JP5980405B1 - Wing removal method, apparatus and jig for performing this method, and wing set provided with this apparatus - Google Patents

Abstract

An object of the present invention is to easily remove a wing from a groove extending in a circumferential direction without damaging the wing. A detaching device is disposed between a first wing 40a and a second wing 40b adjacent to each other in the circumferential direction Dc, and is formed with a first facing surface 132a facing the outer surface of the first wing 40a. With respect to the second member 110b, the second member 110b, which is disposed between the member 110a, the first wing 40a and the second wing 40b, and is formed with an opposing surface 132b facing the outer surface of the second wing 40b. A separating mechanism 150 that moves the first member 110a in a relatively separating direction. [Selection] Figure 7

Description

  The present invention relates to a method for removing blades in a rotating machine, a device and jig for carrying out the method, and a blade set including the device.

  An axial compressor that is a kind of rotating machine includes a rotor that rotates about an axis, a casing that covers the rotor, and a plurality of stationary blade rows that are fixed inside the casing. The rotor has a rotor shaft and a plurality of moving blade rows attached to the rotor shaft. Each moving blade row is arranged upstream of any one of the plurality of stationary blade rows. The moving blade row is composed of a plurality of moving blades arranged in the circumferential direction with respect to the axis. The stationary blade row is also composed of a plurality of stationary blades arranged in the circumferential direction with respect to the axis.

  Patent Document 1 below discloses the above axial flow compressor. The casing of this axial flow compressor has a stationary blade retaining ring to which one stationary blade row is attached. The stator blade retaining ring is formed with a groove that is recessed outward in the radial direction with respect to the axis and extends in the circumferential direction with respect to the axis. Each of the plurality of stationary blades constituting one stationary blade row includes a blade body extending in the radial direction with respect to the axis, and a blade root provided on the radially outer side of the blade body. The plurality of stationary blades are attached to the stationary blade retaining ring by fitting the blade roots of the stationary blades into the grooves of the stationary blade retaining ring.

JP 2007-138944 A

  In the rotating machine described in Patent Document 1, the stationary blade may adhere to the stationary blade holding ring after a long operation. For this reason, when inspecting or repairing the rotary machine described in Patent Document 1, it may be difficult to remove the stationary blade from the groove of the stationary blade holding ring without damaging the stationary blade.

  Then, an object of this invention is to provide the technique which can remove a wing | blade easily from a groove | channel, without damaging a wing | blade.

An apparatus for removing a wing as one aspect according to the invention for achieving the above object is as follows.
In a plurality of blade removal devices, in which a blade root is fitted in a groove that is recessed in the radial direction with respect to the axis and extends in the circumferential direction with respect to the axis, the first of the plurality of blades adjacent in the circumferential direction. A first member disposed between the one wing and the second wing, wherein an outer surface of the first wing is opposed to a surface on the second wing side; the first wing and the first wing; A second member disposed between two wings and formed with an opposing surface facing the surface on the first wing side of the outer surface of the second wing, and the first member with respect to the second member A separation mechanism that moves the member in a relatively separating direction.

  In the detaching device, the first member is moved in a direction away from the second blade by moving the first member in a direction away from the second member by the separation mechanism. To do. Therefore, with the said removal apparatus, a wing | blade can be easily removed from a groove | channel.

  Moreover, in the said removal apparatus, since a wing | blade is pushed to a separation direction and this wing | blade is moved to a separation direction via a 1st member or a 2nd member, damage to the wing | blade in the removal process can be suppressed.

  Here, the wing removal apparatus as the one aspect may include a guide mechanism that regulates a relative movement direction of the first member with respect to the second member in the circumferential direction.

  In the said removal apparatus, since a 1st member moves to the circumferential direction relatively with respect to a 2nd member, a wing | blade can be moved to the circumferential direction easily.

  In the wing removal device according to the aspect, one of the facing surface of the first member and the facing surface of the second member is opposed to a ventral side surface of the wing body in the wing. And corresponding to the shape of the abdominal side surface, at least a part forms a ventral side opposing surface having a convex curved surface, and the other opposing surface opposes the back side surface of the wing body in the wing, and the back side surface Corresponding to the shape, a back side facing surface having a concave curved surface may be formed.

  In the detaching device, the opposed surface having a shape corresponding to the shape of the blade surface is opposed to the blade surface of the blade, and the blade surface is pushed by the opposed surface, so that the relative movement of the blade surface with respect to the opposed surface is suppressed. Can do. That is, the relative movement of the first wing with respect to the first member and the relative movement of the second wing with respect to the second member can be suppressed. For this reason, the first blade can be efficiently and easily moved by the relative movement of the first member with respect to the second member.

  In the wing removal apparatus having the ventral-side facing surface and the back-side facing surface, the facing surface is a wing edge that is one edge of a front edge and a rear edge of a wing body in the wing, and You may have a concave curved surface corresponding to the blade edge part including the part by the side of the said blade edge of an opposing surface, and corresponding to the shape of the said blade edge part.

  Specifically, the ventral facing surface is opposed to a front edge portion including a front edge of a wing body in the wing and a front edge side portion of the ventral side surface, and is a concave curved surface corresponding to the shape of the front edge portion. You may have. In this case, the abdomen facing surface is opposed to the front edge part of the wing body including the front edge of the wing body, and has a concave curved surface corresponding to the shape of the front edge part. Can be prevented from moving to the upstream side in the axial direction, that is, the front side. Further, the back side facing surface is opposed to a rear edge including a rear edge of the wing body and a rear edge side portion of the back side surface of the wing, and has a concave curved surface corresponding to the shape of the rear edge portion. Also good. In this case, in the detaching apparatus, the back-side facing surface faces the rear edge of the wing body including the rear edge of the wing body, and has a concave curved surface corresponding to the shape of the rear edge portion. It is possible to suppress the wing body from moving downstream in the axial direction, that is, to the rear side with respect to the surface.

  In any one of the above-described wing removal devices having the ventral facing surface and the dorsal facing surface, the contact point between the ventral facing surface and the virtual circle, the back facing surface and the virtual circle You may provide the guide mechanism which regulates the relative movement direction of the said 1st member with respect to a said 2nd member in the said circumferential direction which has an angle with respect to the line segment which connects a contact.

  Direction of action of reaction force received by the ventral side facing surface from the ventral side when pushing the ventral side of the wing body with the ventral facing surface, and back side to dorsal side when pressing the back side of the wing body with the dorsal facing surface The acting direction of the reaction force received by the facing surface is a direction inclined with respect to the circumferential direction. In the detaching device, the first member can be moved in the circumferential direction relative to the second member even if each member receives a reaction force whose action direction is inclined with respect to the circumferential direction from the wing body. .

  In the blade removing device including the guide mechanism, the guide mechanism is fixed to at least one of the first member and the second member, and extends in the circumferential direction, and the first member. And a guide groove formed on the other of the second member, recessed in the radial direction with respect to the axis, and extending in the circumferential direction so that the guide rod can be inserted therethrough.

  In the detaching device, the guide bar can be inserted into the guide groove not only from the direction in which the guide groove extends, but also from the direction perpendicular to this direction. Therefore, in the said removal apparatus, a space required when putting a guide rod in a guide groove can be made small.

  In the wing removal device having the guide rod and the guide groove, the guide mechanism includes a first guide rod as the guide rod fixed to the first member, and the second member fixed to the second member. A second guide rod as a guide rod, a second guide groove as the guide groove formed in the first member through which the second guide rod can be inserted, and the first guide rod formed in the second member A first guide groove as the guide groove that can be inserted, and the direction of the opening of the first guide groove with respect to the groove bottom is opposite to the direction of the opening of the second guide groove with respect to the groove bottom. Also good.

  In the blade removing device having the first guide rod and the second guide rod, the first guide rod is one of the first members in the axial direction in which the axis extends with respect to the opposing surface. The second guide groove, which is fixed to the region on the side and into which the second guide rod enters, may be formed in the region on the other side in the axial direction of the first member with respect to the facing surface. .

  In the detaching device, the guide rod and the guide groove into which the guide rod is inserted are provided on both sides of the opposing surface that presses the wing. Therefore, in the relative movement process of the first member with respect to the second member, One member can be prevented from tilting.

  In the wing removal apparatus as the one aspect, the facing surface of the first member is a surface facing a blade root of the first wing, and the facing surface of the second member is the second member. It may be a surface facing the blade root of the wing.

  In the blade removing device, in which the facing surface is a surface facing the blade root, the blade is provided with a guide mechanism that regulates a relative movement direction of the first member with respect to the second member in the circumferential direction. In the state where the facing surface of the first member faces the blade root of the first wing and the facing surface of the second member faces the blade root of the second wing, It may be located between the blade root and the blade root of the second blade.

  In any of the above blade removal devices, wherein the facing surface is a surface facing the blade root, a guide mechanism that regulates a relative movement direction of the first member with respect to the second member in the circumferential direction. And the guide mechanism is fixed to at least one of the first member and the second member, and extends to the other of the first member and the second member. And a guide hole that extends in the circumferential direction and through which the guide rod can be inserted.

  In the blade removing device, wherein the opposed surface is a surface opposed to the blade root, and the guide rod and the guide hole, the guide mechanism is the guide rod fixed to the first member. The first guide rod, the second guide rod as the guide rod fixed to the second member, and the second guide as the guide hole formed in the first member and through which the second guide rod can be inserted. A first guide hole as the guide hole formed in the second member and through which the first guide rod can be inserted, wherein the first guide rod is the opposite of the first member. The second guide hole is fixed to a region on the other side in the axial direction with respect to the opposing surface of the first member. It may be formed.

  In any one of the wing removal devices described above, the first member and the second member have a groove bottom facing surface that faces the groove bottom surface of the groove, and the separation mechanism includes the first member and the first member. A tapered surface formed on at least one of the second members and gradually approaching the other member as it approaches the groove bottom facing surface of the one member; and the tapered surface and the other member And a wedge disposed between the tapered surface and the tapered surface.

  In the blade removing device having the tapered surface, the taper facing surface of the other member is a taper surface that gradually approaches the one member as it approaches the groove bottom facing surface of the other member. May be.

  In any one of the above blade removing devices having the tapered surface, the direction is along the tapered surface and is perpendicular to the taper inclination direction that approaches the groove bottom facing surface in the shortest distance, and the The taper extending direction, which is a direction along the tapered surface, may be an axis direction in which the axis extends and a direction intersecting the circumferential direction.

  In any one of the above-described wing removal devices having the tapered surface, the one member includes a first surface extending in a direction intersecting an axial direction in which the axis extends, and the first surface. A second surface extending in a direction intersecting the axial direction at a position displaced in the axial direction and the circumferential direction is formed, and the other member extends in a direction intersecting the axial direction. A first surface and a second surface extending in a direction intersecting the axial direction at a position shifted from the first surface of the other member in the axial direction and the circumferential direction, The first surface of the member is formed at a position that can face the first surface of the one member in the axial direction, and the second surface of the other member is the first surface of the other member. Formed in a position that can face the two surfaces in the axial direction, The taper surface is formed between the first surface and the second surface of the material, and the taper facing surface is formed between the first surface and the second surface of the other member. May be.

  In any of the above wing removal apparatuses, the separation mechanism includes an actuator that generates a force for moving the first member relative to the second member. May be.

  In any one of the wing removal devices described above, the wing removal device is formed of a soft material softer than the first member and the second member, and is between the first surface of the first wing and the facing surface of the first member. And a buffer member disposed between at least one of the second wing and the second portion between the facing surface of the second member.

The wing set as one aspect according to the invention for achieving the above-described object is:
One of the above-described wing removal devices, a wing holding member in which the groove is formed, and the wing fitted in the groove.

The jig as one aspect according to the invention for achieving the object is
A jig composed of a pair of members, a first member and a second member, disposed between a plurality of wings adjacent in the circumferential direction, the convex curved surface corresponding to the concave curved surface of the flank side of the wing, or the wing An opposing surface having at least a part of a concave curved surface corresponding to the convex curved surface of the back side surface, and a separation mechanism for moving the first member and the second member in a direction to separate each other, A tapered surface that is not parallel to the opposing surface is included .

Here, in the jig may have a guide rod and / or guide grooves extending in a direction along the facing surface substantially perpendicular to the plane. The surface substantially perpendicular to the facing surface includes not only a surface perpendicular to the facing surface but also a surface that forms an angle of 0 ° to 45 ° with respect to the vertical surface.

A method for removing a wing as one aspect according to the invention for achieving the above object is as follows:
In a method for removing a plurality of blades, the blade roots being fitted in grooves that are recessed in the radial direction with respect to the axis and extending in the circumferential direction with respect to the axis, the first blade and the second blade adjacent in the circumferential direction, A first member formed with a facing surface facing a part of the outer surface of the first wing, and a second member formed with a facing surface facing a part of the outer surface of the second wing. A preparation step of preparing a removal device comprising: a separation mechanism that moves the first member in a direction of separating the first member relative to the second member; and the second of the outer surfaces of the first blade An arrangement step in which the facing surface of the first member is opposed to a surface on the wing side, and the facing surface of the second member is opposed to a surface on the first wing side among the outer surfaces of the second wing; The separation mechanism moves the first member relatively away from the second member. A spacing step of, for the execution.

  In the removal method, the blade can be easily removed from the groove while suppressing damage to the blade, as in the above-described removal device.

  In the blade removal method, the blade holding member formed with the groove is formed with a pair of surfaces extending in the circumferential direction and facing opposite sides in the axial direction in which the axis extends. The one member and the second member are formed with restriction surfaces that come into contact with the pair of surfaces in the execution of the arranging step, and in the separation step, the first member and the second member are formed on the pair of surfaces of the blade holding member. The first member may be moved relative to the second member while the regulating surfaces of the two members are in contact with each other.

  In the removal method, the relative movement direction of the first member with respect to the blade holding member can be regulated in the circumferential direction in the separation step.

  In any of the above-described wing removal methods, the removal device regulates the relative movement direction of the first member with respect to the second member in a direction that becomes the circumferential direction in the execution of the arrangement step. May be provided.

  In the removal method, the relative movement direction of the first member with respect to the second member can be restricted in the circumferential direction in the separation step.

  Further, in any one of the above blade removal methods, in the preparation step, a first removal device as the removal device is prepared, and the placement step includes the first blade and the second blade. Including a first disposing step of disposing the first detaching device between the first member and the second member by the separating mechanism of the first detaching device after the first disposing step. Including a first separation step of moving the first member in a relatively separating direction, and in the first removal device, the opposing surface of the first member and the opposing surface of the second member, One opposing surface is opposed to the ventral side surface of the wing body in the wing in the execution of the first arrangement step, and at least part of the opposing surface has a convex curved surface corresponding to the shape of the ventral side surface. And the other facing surface is the back of the wing body in the wing in the execution of the first arrangement step. Facing the surface corresponding to the shape of the back side, it may form the back side opposing face having a concave curved surface.

  In this removal method, the wing surface of the wing is opposed to the wing surface corresponding to the shape of the wing surface, and the wing surface is pushed by this facing surface, so that the relative movement of the wing surface with respect to the facing surface is suppressed. Can do. That is, the relative movement of the first wing with respect to the first member and the relative movement of the second wing with respect to the second member can be suppressed. For this reason, the first blade can be efficiently and easily moved by the relative movement of the first member with respect to the second member.

  In the wing removal method of preparing the first removal device in the preparation step, the abdomen facing surface includes a front edge of a wing body and a front edge side portion of the abdomen side surface of the wing. You may have a concave curved surface which opposes a part and respond | corresponds to the shape of the said front edge part.

  In the wing removal method according to any one of the above, wherein the first removal device is prepared in the preparation step, the first removal device includes a contact point between the ventral surface and a virtual circle, and the back side. The relative movement direction of the first member with respect to the second member is set in a direction that has an angle with respect to a line segment that connects the contact point between the opposing surface and the virtual circle and that becomes the circumferential direction in the execution of the first arrangement step. You may provide the 1st guide mechanism to regulate.

  The direction of action of the reaction force received by the ventral side facing surface from the ventral side surface of the wing body and the direction of action of the reaction force received by the back side facing surface from the back side surface of the wing body are directions inclined with respect to the circumferential direction. In the removal method, the first member can be moved in the circumferential direction relatively to the second member even when each member receives a reaction force whose action direction is inclined with respect to the circumferential direction from the wing body. .

  In the wing removal method, wherein the first removal device prepared in the preparation step has a first guide mechanism, the first guide mechanism is at least one of the first member and the second member. A guide rod fixed to the circumferential direction and formed on the other of the first member and the second member, recessed in a radial direction with respect to the axis, and extending in the circumferential direction so that the guide rod is inserted therethrough. A guide groove, and in the first arrangement step, after one of the first member and the second member is arranged between the first blade and the second blade. The other member is moved in the radial direction, the other member is disposed between the first wing and the second wing, and the guide rod of the one member is moved to the guide of the other member. You may put in a groove.

  In the assembled state in which the guide rod enters the guide groove and the first member and the second member are assembled, the first member and the second member may not be disposed between the first blade and the second blade. In the removal method, the guide bar can be inserted into the guide groove not only from the direction in which the guide groove extends but also from the radial direction perpendicular to this direction. Therefore, in the said removal method, even if it arrange | positions a 1st member and a 2nd member separately at a 1st arrangement | positioning process, a 1st member and a 2nd member can be made the above-mentioned assembly | attachment state.

  In the wing removal method according to any one of the above, the first removal device is prepared in the preparation step, and in the first arrangement step, the buffer is softer than the wing, the first member, and the second member. A member is disposed between the wing body of the first wing and the facing surface of the first member, and the buffer member is disposed between the wing body of the second wing and the facing surface of the second member. You may arrange | position between.

  In the removal method, damage to the blade surface during execution of the first separation step can be further suppressed.

  In any one of the above-described wing removal methods, wherein the first removal device is prepared in the preparation step, the blade root of the wing is formed with a ventral side surface with respect to a back side surface of the wing body in the wing. A ventral ventral end surface and a dorsal end surface facing away from the ventral end surface, and in the preparing step, in addition to the first detaching device as the detaching device, A second detaching device as a detaching device is prepared, and the arranging step includes the first member in the second detaching device between the first wing and the second wing after the first separating step. And a second disposing step of disposing the second member, and the separating step includes the second disposing device after the second disposing step by the separating mechanism of the second removing device. A second separation step of moving the first member of the second removal device relative to the member in a direction of separating the first member. In the second detaching device, one of the opposing surface of the first member and the opposing surface of the second member is the ventral end surface of the blade root of the first wing. In addition, a ventral-side facing surface that is opposed in the execution of the second placement step is formed, and the other facing surface is opposed to the dorsal side end surface of the blade root in the second wing in the execution of the second placement step. A back side facing surface may be formed.

  In the removal method, even if the first blade is firmly fixed to the groove, the first blade can be easily moved in the circumferential direction with respect to the groove by executing the second separation step.

  In the wing removal method of preparing the second removal device in the preparation step, the second removal device restricts a relative movement direction of the first member with respect to the second member in the circumferential direction. The second guide mechanism is disposed in the groove between the blade root of the first blade and the blade root of the second blade in the execution of the second arrangement step. May be.

  In the wing removal method, wherein the first removal device prepared in the preparation step includes the second guide mechanism, the second guide mechanism is at least one of the first member and the second member. And a guide hole formed in the other of the first member and the second member and extending in the circumferential direction and through which the guide bar can be inserted. May be.

  In any of the above wing removal methods, the first member and the second member have a groove bottom facing surface that faces the groove bottom surface of the groove, and the separation mechanism includes the first member and the first member. A tapered surface formed on at least one of the second members and gradually approaching the other member as it approaches the groove bottom facing surface of the one member; and the tapered surface and the other member A wedge disposed between the taper surface and the taper surface facing the taper surface, and in the separation step, the wedge may be driven between the taper surface and the taper surface.

  According to one aspect of the present invention, a wing can be easily removed from a groove extending in the circumferential direction without damaging the wing.

It is a typical sectional view of a gas turbine in one embodiment concerning the present invention. It is principal part sectional drawing of the gas turbine in one Embodiment which concerns on this invention. It is a perspective view of a stationary blade and a division holding ring in one embodiment concerning the present invention. It is a perspective view of the 1st detaching device in one embodiment concerning the present invention. It is a top view of the 1st detaching device in one embodiment concerning the present invention. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. It is a top view of the 2nd detachment device in one embodiment concerning the present invention. It is the IX-IX sectional view taken on the line in FIG. It is a flowchart which shows the removal procedure of the stationary blade in one Embodiment which concerns on this invention. It is a figure which shows the 1st modification of the separation mechanism in one Embodiment which concerns on this invention. It is a figure which shows the 2nd modification of the separation mechanism in one Embodiment which concerns on this invention. It is a figure which shows the 3rd modification of the separation mechanism in one Embodiment which concerns on this invention. It is a figure showing the 1st modification of the 1st member and the 2nd member in one embodiment concerning the present invention. It is a figure which shows the 2nd modification of the 1st member in one Embodiment which concerns on this invention, and a 2nd member.

  Hereinafter, an embodiment of the present invention and its modification will be described in detail with reference to the drawings.

"Embodiment of rotating machine"
An embodiment of a rotating machine will be described with reference to FIGS.

  The rotating machine of this embodiment is a compressor of a gas turbine. As shown in FIG. 1, the gas turbine 1 includes a compressor 30 that compresses air A, a combustor 20 that generates combustion gas G by burning fuel F in the air A compressed by the compressor 30, and And a turbine 10 driven by combustion gas G.

  The compressor 30 includes a compressor rotor 31 that rotates about an axis Ar, a compressor casing 35 that covers the compressor rotor 31, and a plurality of stationary blade rows 37. The turbine 10 includes a turbine rotor 11 that rotates about an axis Ar, a turbine casing 15 that covers the turbine rotor 11, and a plurality of stationary blade rows 17.

  The compressor rotor 31 and the turbine rotor 11 are located on the same axis Ar, and are connected to each other to form the gas turbine rotor 2. For example, a rotor of a generator GEN is connected to the gas turbine rotor 2. The compressor casing 35 and the turbine casing 15 are connected to each other to form the gas turbine casing 5. In the following, the direction in which the axis Ar extends is referred to as the axial direction Da, the circumferential direction around the axis Ar is simply referred to as the circumferential direction Dc, and the direction perpendicular to the axis Ar is referred to as the radial direction Dr. Further, in the axial direction Da, the compressor 30 side is defined as the upstream side Dau and the opposite side as the downstream side Dad with reference to the turbine 10. In addition, the side closer to the axis Ar in the radial direction Dr is referred to as a radial inner side Dri, and the opposite side is referred to as a radial outer side Dro.

  As shown in FIG. 2, the turbine rotor 11 includes a rotor shaft 12 that extends in the axial direction Da around the axis line Ar, and a plurality of blade rows 13 that are attached to the rotor shaft 12. The plurality of blade rows 13 are arranged in the axial direction Da. Each rotor blade row 13 is composed of a plurality of rotor blades arranged in the circumferential direction Dc. A stationary blade row 17 is arranged on each upstream side Dau of the plurality of blade rows 13. Each stationary blade row 17 is provided inside the turbine casing 15. Each stationary blade row 17 is configured by a plurality of stationary blades arranged in the circumferential direction Dc.

  The compressor rotor 31 includes a rotor shaft 32 extending in the axial direction Da around the axis line Ar, and a plurality of rotor blade rows 33 attached to the rotor shaft 32. The plurality of blade rows 33 are arranged in the axial direction Da. Each rotor blade row 33 is composed of a plurality of rotor blades arranged in the circumferential direction Dc. A stationary blade row 37 is disposed on each downstream side Dad of the plurality of blade rows 33. Each stationary blade row 37 is provided inside the compressor casing 35. Each stationary blade row 37 is configured by a plurality of stationary blades arranged in the circumferential direction Dc. An annular space between the outer peripheral side of the rotor shaft 32 and the inner peripheral side of the compressor casing 35 forms an air compression passage 39 that is compressed while air flows.

  The compressor casing 35 has a stationary blade holding ring 36 to which each stationary blade row 37 is attached. The stationary blade holding ring 36 has a plurality of divided holding rings 60. The plurality of divided holding rings 60 are arranged in the circumferential direction Dc, and constitute one annular stationary blade holding ring 36 around the axis Ar. The stationary blade retaining ring 36 defines a part of the radially outer edge of the annular air compression passage 39.

  As shown in FIG. 3, each of the plurality of stationary blades 40 constituting the stationary blade row 37 has a blade body 41 extending in the radial direction Dr and a blade root 50 provided on the radially outer side Drro of the blade body 41. And having.

  The wing body 41 has an airfoil shape. An end of the upstream side Dau of the wing body 41 forms a leading edge 42, and an end of the downstream side Dad forms a trailing edge 43. Of the surfaces facing the circumferential direction Dc on the surface of the wing body 41, the convex surface forms the back side surface (negative pressure surface) 45, and the concave surface forms the ventral side surface (positive pressure surface) 44. For the convenience of the following explanation, the ventral side (= pressure surface side) of the wing body 41 in the circumferential direction Dc is the circumferential abdominal side Dcp, and the back side (= negative pressure surface side) of the wing body 41 is the circumferential back side Dcn. And Further, the upstream side Dau in the axial direction Da may be referred to as the front side, and the downstream side Dad in the axial direction Da may be referred to as the rear side.

  The blade root 50 has a gas path surface 51, a peripheral surface 52, a bottom surface 57, a front step surface 58, and a rear step surface 59. The gas path surface 51 faces the radially inner side Dri and is in contact with the air flowing in the air compression flow path 39. The gas path surface 51 has a rectangular shape when viewed from the radial direction Dr. The wing body 41 is formed on the gas path surface 51. The peripheral surface 52 includes a first front end surface 53a, a second front end surface 53b, a first rear end surface 54a, a second rear end surface 54b, a ventral side end surface 55, and a back side end surface 56.

  The first front end surface 53a extends from the edge of the front side Dau of the gas path surface 51 to the radially outer side Dro. The first front end surface 53a faces the front side Dau. The first rear end surface 54 a extends from the edge of the rear side Dad of the gas path surface 51 to the radially outer side Dro. The first rear end face 54a faces the rear side Dad. The first rear end face 54a is substantially parallel to the first front end face 53a. The front step surface 58 extends from the edge of the first front end surface 53a on the radially outer side Dro to the front side Dau. The rear step surface 59 extends from the edge of the first rear end surface 54a on the radially outer side Dro to the rear Dad. Both the front step surface 58 and the rear step surface 59 face the radially inner side Dri and are substantially parallel to the gas path surface 51. The second front end surface 53b extends from the edge of the front side Dau of the front step surface 58 to the radially outer side Dro. The second front end surface 53b faces the front side Dau. The second rear end surface 54 b extends from the edge of the rear side Dad of the rear step surface 59 to the radially outer side Dro. The second rear end face 54b faces the rear side Dad. The second rear end face 54b is substantially parallel to the second front end face 53b. The distance in the axial direction Da between the second front end face 53b and the second rear end face 54b is larger than the distance in the axial direction Da between the first front end face 53a and the first rear end face 54a.

  The ventral end face 55 extends from the edge of the gas path face 51 in the circumferential direction ventral side Dcp to the radially outer side Dro. The ventral end surface 55 faces the circumferential ventral side Dcp. The ventral side end surface 55 includes the first front end surface 53a, the front step surface 58, the second front end surface 53b, the first rear end surface 54a, the rear step surface 59, and the respective edges of the circumferential rear side Dcp of the second rear end surface 54b. linked. The back side end face 56 extends from the edge of the circumferential back side Dcn of the gas path surface 51 to the radially outer side Dro. The back side end face 56 faces the circumferential back side Dcn. The ventral side end surface 55 includes the first front end surface 53a, the front step surface 58, the second front end surface 53b, the first rear end surface 54a, the rear step surface 59, and the respective edges of the circumferential rear side Dcn of the second rear end surface 54b. linked. The dorsal end surface 56 is substantially parallel to the ventral end surface 55. The bottom surface 57 faces the radially outer side Dro and is substantially parallel to the gas path surface 51. The bottom surface 57 is connected to each edge of the radially outer side Dro of the second front end surface 53b, the second rear end surface 54b, the ventral side end surface 55, and the back side end surface 56.

  The split holding ring 60 is formed with a groove 70 that is recessed radially outward Dro and extends in the circumferential direction Dc. The split holding ring 60 includes a front inner peripheral surface 61, a rear inner peripheral surface 62, a front side surface 63, a rear side surface 64, an outer peripheral surface 65, and a pair of split surfaces 66 as outer surfaces.

  Each of the front inner peripheral surface 61 and the rear inner peripheral surface 62 extends in the circumferential direction Dc while facing the radial inner side Dri. The rear inner peripheral surface 62 is separated from the front inner peripheral surface 61 to the rear side Dad. Both the front inner peripheral surface 61 and the rear inner peripheral surface 62 are in contact with the air flowing in the air compression passage 39. The edge of the rear side Dad of the front inner peripheral surface 61 forms a front opening edge of the opening in the groove 70 of the divided holding ring 60. The edge of the front side Dau of the rear inner peripheral surface 62 forms a rear opening edge of the opening in the groove 70 of the divided holding ring 60. The front side surface 63 extends from the edge of the front side Dau of the front inner peripheral surface 61 to the radially outer side Dro. The front side surface 63 faces the front side Dau. The rear side surface 64 extends from the edge of the rear side Dad of the rear inner peripheral surface 62 to the radially outer side Dro. The rear side surface 64 faces the rear side Dad. The rear side surface 64 is substantially parallel to the front side surface 63. Of the pair of split surfaces 66, one split surface 66 faces one side in the circumferential direction Dc, and extends radially outward from the edge on one side of the front inner peripheral surface 61 and the rear inner peripheral surface 62 in the circumferential direction Dc. It has spread. The other split surface 66 faces the other side in the circumferential direction Dc and extends from the other side edge in the circumferential direction Dc of the front inner peripheral surface 61 and the rear inner peripheral surface 62 to the radially outer side Dro. The edges of the front side Dau of each dividing surface 66 are all connected to the front side surface 63. In addition, each edge of the rear surface Dad of each divided surface 66 is connected to the rear surface 64. The outer peripheral surface 65 faces the radially outer side Dro and extends in the circumferential direction Dc. The outer peripheral surface 65 is connected to the respective edges of the front side surface 63, the rear side surface 64, the outer peripheral surface 65, and the pair of split surfaces 66 on the radially outer side Dro.

  The groove 70 of the split retaining ring 60 is defined by a front opening surface 73, a rear opening surface 74, a groove front step surface 78, a groove rear step surface 79, a groove front side surface 75, a groove rear side surface 76, and a groove bottom surface 77. The front opening surface 73, the rear opening surface 74, the groove front step surface 78, the groove rear step surface 79, the groove front side surface 75, the groove rear side surface 76, and the groove bottom surface 77 are all surfaces extending in the circumferential direction Dc. The front opening surface 73 extends from the edge of the rear side Dad of the front inner peripheral surface 61, that is, from the front opening edge to the radially outer side Dro. The front opening surface 73 faces the rear side Dad. The rear opening surface 74 extends from the front Dau edge of the rear inner peripheral surface 62, that is, from the rear opening edge to the radially outer side Dro. The rear opening surface 74 faces the front side Dau. The rear opening surface 74 faces the front opening surface 73 with an interval in the axial direction Da. The rear opening surface 74 is substantially parallel to the front opening surface 73.

  The groove front step surface 78 extends from the edge of the front opening surface 73 on the radially outer side Dro to the front side Dau. The groove rear step surface 79 extends from the edge of the rear opening surface 74 on the radially outer side Dro to the rear Dad. Both the groove front step surface 78 and the groove rear step surface 79 face the radially outer side Dro. The groove front side surface 75 extends from the edge of the front side Dau of the groove front step surface 78 to the radially outer side Dro. The groove front side surface 75 faces the rear side Dad. The groove rear side surface 76 extends from the edge of the rear side Dad of the rear groove step surface 79 to the radially outer side Dro. The groove rear side surface 76 faces the front side Dau. The groove rear side surface 76 faces the groove front side surface 75 with an interval in the axial direction Da. The groove rear side surface 76 is substantially parallel to the groove front side surface 75. The groove bottom surface 77 extends in the circumferential direction Dc while facing the radially inner side Dri. The groove bottom surface 77 is connected to each edge of the radially outer side Dro of the groove front side surface 75 and the groove rear side surface 76.

  The dividing surface 66 is connected to each edge in the circumferential direction Dc of the front opening surface 73, the rear opening surface 74, the groove front step surface 78, the groove rear step surface 79, the groove front side surface 75, the groove rear side surface 76, and the groove bottom surface 77. Yes. Therefore, the edge of the opening is formed in the dividing surface 66. This opening forms a blade root inlet / outlet 69 for taking the blade root 50 into and out of the groove 70.

  The blade root 50 of the stationary blade 40 enters the groove 70 of the split holding ring 60 described above. In a mounted state where the blade root 50 is in the groove 70, the gas path surface 51 of the blade root 50 and the front inner peripheral surface 61 and the rear inner peripheral surface 62 of the split retaining ring 60 are substantially flush with each other. It is. In this mounted state, the first front end surface 53 a of the blade root 50 faces the front opening surface 73 of the split holding ring 60 and is substantially in contact with the front opening surface 73. Further, the first rear end surface 54 a of the blade root 50 is opposed to the rear opening surface 74 of the divided holding ring 60 and is substantially in contact with the rear opening surface 74.

  Furthermore, in this mounted state, the front step surface 58 of the blade root 50 faces the front groove step surface 78 of the split retaining ring 60 and substantially contacts the front groove surface 78. Further, the rear step surface 59 of the blade root 50 faces the rear groove step surface 79 of the split retaining ring 60 and is substantially in contact with the rear groove step surface 79. In this mounted state, the second front end face 53 b of the blade root 50 faces the groove front side surface 75 of the split holding ring 60 and is substantially in contact with the groove front side surface 75. Further, the second rear end surface 54 b of the blade root 50 faces the groove rear side surface 76 of the split holding ring 60 and substantially contacts the groove rear side surface 76. In this mounted state, the bottom surface 57 of the blade root 50 faces the groove bottom surface 77 of the split retaining ring 60 and substantially contacts the groove bottom surface 77.

  In the mounted state, of the two stationary blades 40 adjacent to each other in the circumferential direction Dc, the ventral side end surface 55 of the first stationary blade 40a faces the back side end surface 56 of the second stationary blade 40b. It substantially contacts the back end face 56 of 40b.

  As described above, in the mounted state, each surface of the blade root 50 and each surface that defines the groove 70 of the divided retaining ring 60 are substantially in contact with each other. For this reason, when the rotating machine is operated for a long period of time, the blade root 50 may be fixed in the groove 70 of the split holding ring 60.

  In addition, the blade root 50 of the stationary blade 40 demonstrated above may be called a dovetail. For this reason, the groove 70 of the split retaining ring 60 is sometimes called a dovetail groove. The groove 70 of the split holding ring 60 is not limited to the above shape as long as it functions as a dovetail groove. Further, the blade root 50 of the stationary blade 40 is not limited to the above shape as long as it functions as a tenon groove tenon.

"Embodiment of the first removal device"
Embodiment of a 1st removal apparatus is described with reference to FIGS.

  As shown in FIG. 4, the first removal device 100 of the present embodiment includes a first member 110a and a second member 110b disposed between the first stator blade 40a and the second stator blade 40b, and a second member. A separation mechanism 150 that moves the first member 110a relative to the member 110b and a guide mechanism 160 that regulates the relative movement direction of the first member 110a with respect to the second member 110b.

  As shown in FIG. 4 and FIG. 7, the first member 110a and the second member 110b are both radially outer surfaces 111a and 111b and radially inner surfaces 118a and 118b facing opposite sides, and radially outer. Member side surfaces 121a and 121b and blade side surfaces 131a and 131b connecting the side surfaces 111a and 111b and the radially inner side surfaces 118a and 118b are provided. In addition, "a" is attached | subjected as a subscript of a code | symbol about the component of the 1st member 110a, and "b" is attached as a subscript of a code | symbol about the component of the 2nd member 110b.

  The blade side surfaces 131a and 131b have opposing surfaces 132a and 132b, front blade side surfaces 135a and 135b, and rear blade side surfaces 136a and 136b. The facing surfaces 132a and 132b correspond to the blade surface shape of the wing body 41 and substantially have an inverted shape of the blade surface shape. The opposing surfaces 132a and 132b include front edge side facing portions 133a and 133b facing the front edge 42 side of the wing body 41 and rear edge side facing portions 134a and 134b facing the rear edge 43 side of the wing body 41. Have. The front wing side surfaces 135a and 135b are connected to the front edge side facing portions 133a and 133b of the facing surfaces 132a and 132b. The rear blade side surfaces 136a and 136b are connected to the rear edge side facing portions 134a and 134b of the facing surfaces 132a and 132b. Therefore, the opposing surfaces 132a and 132b are located between the front blade side surfaces 135a and 135b and the rear blade side surfaces 136a and 136b. The front wing side surfaces 135a and 135b are substantially parallel to the rear wing side surfaces 136a and 136b. In the first member 110a, the front blade side surface 135a is located closer to the member side surface 121a than the rear blade side surface 136a. Further, in the second member 110b, the rear wing side surface 136b is located closer to the member side surface 121b than the front wing side surface 135b.

  The member side surfaces 121a and 121b include front member side surfaces 122a and 122b, tapered surfaces 125a and 125b, rear member side surfaces 123a and 123b, first guide surfaces 126a and 126b, and second guide surfaces 127a and 127b. . The front member side surfaces 122a and 122b and the front wing side surfaces 135a and 135b have a back-to-back positional relationship. The front member side surfaces 122a and 122b are substantially parallel to the front blade side surfaces 135a and 135b. The rear member side surfaces 123a and 123b and the rear wing side surfaces 136a and 136b have a back-to-back positional relationship. The rear member side surfaces 123a and 123b are substantially parallel to the rear blade side surfaces 136a and 136b and the front member side surfaces 122a and 122b. The rear member side surfaces 123a and 123b are located closer to the blade side surfaces 131a and 131b than the front member side surfaces 122a and 122b.

  In the first member 110a, the first guide surface 126a extends from the edge of the rear side Dad of the front member side surface 122a to the blade side surface 131a side. In the second member 110b, the first guide surface 126b extends from the edge of the rear side Dad of the front member side surface 122b to the side opposite to the blade side surface 131b. The first guide surfaces 126a and 126b extend in a direction intersecting the axial direction Da and are perpendicular to the front member side surfaces 122a and 122b. In the first member 110a, the second guide surface 127a extends from the edge of the front side Dau of the rear member side surface 123a to the side opposite to the blade side surface 131a. In the second member 110b, the second guide surface 127b extends from the edge of the front side Dau of the rear member side surface 123b to the blade side surface 131b. The second guide surfaces 127a and 127b extend in a direction intersecting the axial direction Da, are perpendicular to the rear member side surfaces 123a and 123b, and are parallel to the first guide surfaces 126a and 126b. The second guide surfaces 127a and 127b are located on the rear side Dad from the first guide surfaces 126a and 126b. That is, the second guide surfaces (second surfaces) 127a and 127b are formed at positions shifted in the axial direction Da and the circumferential direction Dc with respect to the first guide surfaces (first surfaces) 126a and 126b.

  The tapered surfaces 125a and 125b are located between the first guide surfaces (first surfaces) 126a and 126b and the second guide surfaces (second surfaces) 127a and 127b. The tapered surfaces 125a and 125b are inclined so as to gradually move away from the blade side surfaces 131a and 131b as they approach the radially outer side surfaces (groove bottom facing surfaces) 111a and 111b from the radially inner side surfaces 118a and 118b. Edges of the front side Dau of the tapered surfaces 125a and 125b are connected to the first guide surfaces 126a and 126b. The edges of the rear side Dad of the tapered surfaces 125a and 125b are connected to the second guide surfaces 127a and 127b.

  The radially inner side surfaces 118a and 118b are planes perpendicular to the front member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b.

  The radially outer surfaces 111a and 111b are front radial outer surfaces 112a and 112b, blade root facing surfaces 114a and 114b, rear radial outer surfaces 113a and 113b, front regulating surfaces 115a and 115b, and rear regulating surfaces 116a. , 116b. The front radial direction outer surfaces 112a and 112b, the blade root facing surfaces 114a and 114b, and the rear radial direction outer surfaces 113a and 113b are all substantially perpendicular to the front member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b. It is a flat surface. The front radial direction outer surfaces 112a and 112b are connected to the edges of the front member side surfaces 122a and 122b on the radial direction outer surfaces 111a and 111b side. The rear radial direction outer surfaces 113a and 113b are connected to the edges of the rear member side surfaces 123a and 123b on the radial outer side surfaces 111a and 111b. The blade root facing surfaces 114a and 114b are located between the front radial direction outer surfaces 112a and 112b and the rear radial direction outer surfaces 113a and 113b. The blade root facing surfaces 114a and 114b are located closer to the radially inner side surfaces 118a and 118b than the front radially outer surfaces 112a and 112b and the rear radially outer surfaces 113a and 113b.

  The front regulating surfaces 115a and 115b are connected to the front radial direction outer surfaces 112a and 112b and the blade root facing surfaces 114a and 114b. The front regulating surfaces 115a and 115b are substantially perpendicular to the front radial direction outer surfaces 112a and 112b. The rear regulating surfaces 116a and 116b are connected to the rear radial direction outer surfaces 113a and 113b and the blade root facing surfaces 114a and 114b. The rear regulating surfaces 116a and 116b are substantially perpendicular to the rear radial direction outer surfaces 113a and 113b. The rear regulating surfaces 116a and 116b face the front regulating surfaces 115a and 115b, and are parallel to the front regulating surfaces 115a and 115b. The distance between the front restricting surfaces 115a and 115b and the rear restricting surfaces 116a and 116b is slightly longer than the distance between the front side surface 63 and the rear side surface 64 of the divided holding ring 60. The distance between the front side surface 63 and the rear side surface 64 is substantially the same. The first guide surfaces 126a and 126b and the second guide surfaces 127a and 127b described above are all parallel to the front regulating surfaces 115a and 115b and the rear regulating surfaces 116a and 116b.

  The facing surface 132a of the first member 110a forms a ventral facing surface 132a that faces the ventral side surface 44 of the wing body 41. The front edge side facing portion 133a in the ventral side facing surface 132a faces the front edge portion 42a including the front edge 42 of the wing body 41 and the front edge 42 side portion of the abdominal side surface 44. The front edge portion 42a of the wing body 41 forms a convex curved surface. For this reason, the front edge side facing portion 133a forms a concave curved surface that is an inverted shape of the convex curved surface. The rear edge side facing portion 134a in the ventral side facing surface 132a faces the rear edge portion 43a that is a portion of the rear side Dad rather than the front edge portion 42a in the ventral side surface 44 of the wing body 41. The rear edge portion 43a of the wing body 41 forms a concave curved surface. For this reason, the trailing edge side facing portion 134a forms a convex curved surface that is an inverted shape of the concave curved surface.

  The facing surface 132 b of the second member 110 b forms a back-side facing surface 132 b that faces the back side surface 45 of the wing body 41. The back side surface 45 of the wing body 41 forms a convex curved surface. For this reason, the front edge side facing portion 133b and the rear edge side facing portion 134b of the back side facing surface 132b form a concave curved surface that is an inverted shape of the convex curved surface.

  The guide mechanism 160 includes a first guide rod 161a fixed to the first member 110a, a second guide rod 161b fixed to the second member 110b, and a second guide rod 161b formed on the first member 110a. A second guide groove 162a and a first guide groove 162b formed in the second member 110b and into which the first guide rod 161a can be inserted. The first guide rod 161a is provided on the rear member side surface 123a of the first member 110a. The second guide bar 161b is provided on the front member side surface 122a of the second member 110b. The first guide groove 162b is recessed from the rear radial direction outer side surface 113b of the second member 110b toward the radial inner side surface 118b. The second guide groove 162a is recessed from the radially inner side surface 118a of the first member 110a toward the front radially outer side surface 112a. The first guide rod 161a provided in the first member 110a and the second guide groove 162a formed in the first member 110a are both a front regulating surface 115a and a rear regulating surface 116a of the first member 110a, and It extends in a direction parallel to the first guide surface 126a and the second guide surface 127a. The second guide rod 161b provided in the second member 110b and the first guide groove 162b formed in the second member 110b are both a front regulating surface 115b and a rear regulating surface 116b of the second member 110b, It extends in a direction parallel to the first guide surface 126b and the second guide surface 127b.

  The ventral-side facing surface 132a and the tapered surface 125a of the first member 110a are formed between the first guide rod 161a and the second guide groove 162a of the first member 110a. Further, the back-side facing surface 132b and the tapered surface 125b of the second member 110b are formed between the second guide rod 161b and the first guide groove 162b of the second member 110b.

  Here, the first guide rod 161a of the first member 110a is inserted into the first guide groove 162b of the second member 110b, and the second guide rod 161b of the second member 110b is inserted into the second guide groove 162a of the first member 110a. Consider the inserted assembly state.

  In this assembled state, the first guide rod 161a, the second guide rod 161b, the first guide groove 162b, the second guide groove 162a, the front regulating surface 115a and the rear regulating surface 116a of the first member 110a, and the first member 110a. The first guide surface 126a and the second guide surface 127a, the front regulating surface 115b and the rear regulating surface 116b of the second member 110b, and the first guide surface 126b and the second guide surface 127b of the second member 110b are parallel to each other.

  In this assembled state, the tapered surface 125a of the first member 110a and the tapered surface 125b of the second member 110b are opposed to each other. Further, the first guide surface 126a of the first member 110a and the first guide surface 126b of the second member 110b face each other and are in surface contact with each other. Furthermore, the second guide surface 127a of the first member 110a and the second guide surface 127b of the second member 110b face each other and are in surface contact with each other. As described above, the first guide surface 126a and the second guide surface 127a of the first member 110a are parallel to the first guide rod 161a. Further, the first guide surface 126b and the second guide surface 127b of the second member 110b are parallel to the second guide rod 161b. Therefore, the first guide surface 126a and the second guide surface 127a of the first member 110a and the first guide surface 126b and the second guide surface 127b of the second member 110b are all the first member 110a with respect to the second member 110b. It functions as a part of the guide mechanism 160 that regulates the relative movement direction.

  In this assembled state, as shown in FIG. 5, a virtual circle C is assumed that is in contact with the abdomen facing surface 132a of the first member 110a and the back facing surface 132b of the second member 110b. In the present embodiment, the first guide rod 161a and the second guide line 161 are connected to a line segment L connecting the contact point Ca between the virtual circle C and the ventral facing surface 132a and the contact point Cb between the virtual circle C and the back facing surface 132b. The guide bar 161b is inclined. In other words, with respect to the line segment L, the first guide bar 161a, the second guide bar 161b, and the like extend in an angled direction.

  The separation mechanism 150 includes a tapered surface 125a of the first member 110a, a tapered surface 125b of the second member 110b, and a wedge 151. The wedge 151 is disposed between the tapered surface 125a of the first member 110a and the tapered surface 125b of the second member 110b in the assembled state. The wedge 151 has a first wedge surface 152a and a second wedge surface 152b. The angle formed by the second wedge surface 152b with respect to the first wedge surface 152a is substantially equal to the angle formed by the tapered surface 125b of the second member 110b with respect to the tapered surface 125a of the first member 110a in the assembled state. .

  As shown in FIGS. 5 and 7, the first detaching device 100 further includes a buffer plate (buffer member) disposed between the ventral side facing surface 132 a of the first member 110 a and the ventral side surface 44 of the stationary blade 40. ) 170 and a buffer plate (buffer member) 170 disposed between the back-side facing surface 132b of the second member 110b and the back side surface 45 of the stationary blade 40. The buffer plate 170 is formed of a soft material softer than the stationary blade 40, the first member 110a, and the second member 110b. The stationary blade 40 is made of, for example, stainless steel. Moreover, the 1st member 110a and the 2nd member 110b are formed with steel, for example. On the other hand, the buffer plate 170 is made of copper that is softer than stainless steel or steel.

  In the present embodiment, the first member 110a, the first guide rod 161a fixed to the first member 110a, and the second guide groove 162a formed in the first member 110a constitute a jig. In this embodiment, the second member 110b, the second guide rod 161b fixed to the second member 110b, and the first guide groove 162b formed in the second member 110b constitute a jig.

“Second Embodiment of Removal Device”
Embodiment of a 2nd removal apparatus is demonstrated with reference to FIG.8 and FIG.9.

  As shown in FIG.8 and FIG.9, the 2nd removal apparatus 200 of this embodiment is the 1st member 210a and the 2nd member 210b which are arrange | positioned between the 1st stator blade 40a and the 2nd stator blade 40b. A separation mechanism 250 that moves the first member 210a relatively away from the second member 210b, and a guide mechanism 260 that regulates the relative movement direction of the first member 210a relative to the second member 210b. .

  The first member 210a and the second member 210b have a rectangular parallelepiped shape having the same shape and the same size. The first member 210a and the second member 210b include radial outer surfaces 211a and 211b and radially inner side surfaces 218a and 218b facing opposite sides, member side surfaces 221a and 221b and blade side surfaces 231a facing opposite sides. 231b, and front surfaces 215a, 215b and rear surfaces 216a, 216b facing opposite sides.

  The rear surfaces 216a and 216b are parallel to the front surfaces 215a and 215b. The distance between the front surfaces 215a and 215b and the rear surfaces 216a and 216b is slightly shorter than the distance between the front opening surface 73 and the rear opening surface 74 of the divided holding ring 60, but the front opening surface of the divided holding ring 60. The distance between the opening 73 and the rear opening surface 74 is substantially the same. The distance between the radially inner surfaces 218a and 218b and the radially outer surfaces 211a and 211b is larger than the groove depth of the groove 70 of the split retaining ring 60. The groove depth dimension is a dimension from the front inner peripheral surface 61 to the groove bottom surface 77 of the divided holding ring 60.

  The blade side surfaces 231a, 231b of the first member 210a and the second member 210b of the second removal device 200 are different from the blade side surfaces 131a, 131b of the first member 110a and the second member 110b of the first removal device 100, It is formed with one plane. The blade side surfaces 231a and 231b are formed continuously from the edge of the radially inner side surfaces 218a and 218b to the edge of the radially outer side surfaces 211a and 211b. Of the blade side surface 231a of the first member 210a, the surface on the radial outer surface 211a side forms a facing surface 232a that faces the ventral end surface 55 of the blade root 50 of the first stationary blade 40a. Of the blade side surface 231b of the second member 210b, the surface on the radial outer surface 211b side forms a facing surface 232b that faces the back side end surface 56 of the blade root 50 of the second stationary blade 40b.

  The member side surfaces 221a and 221b have main member side surfaces 222a and 222b and tapered surfaces 225a and 225b. The main member side surfaces 222a and 222b are formed in one plane. The main member side surfaces 222a and 222b are formed continuously from the edge of the radially inner side surfaces 218a and 218b to the edge of the radially outer side surfaces 211a and 211b. The tapered surfaces 225a and 225b are formed at substantially intermediate positions between the front surfaces 215a and 215b and the rear surfaces 216a and 216b in the main member side surfaces 222a and 222b. The tapered surfaces 225a and 225b are inclined so as to gradually move away from the blade side surfaces 231a and 231b as they go from the radially inner side surfaces 218a and 218b to the radially outer side surfaces 211a and 211b.

  The guide mechanism 260 includes a first guide bar 261a fixed to the first member 210a, a second guide bar 261b fixed to the second member 210b, and a second guide bar 261b formed on the first member 210a. A second guide hole 262a and a first guide hole 262b formed in the second member 210b and into which the first guide rod 261a can be inserted. The first guide rod 261a is provided at a position closer to the rear surface 216a than the tapered surface 225a in the main member side surface 222a of the first member 210a. The second guide bar 261b is provided at a position closer to the front surface 215b than the tapered surface 225b in the main member side surface 222b of the second member 210b. The first guide hole 262b is recessed in the main member side surface 222b of the second member 210b from the position on the rear surface 216b side to the blade side surface 231b side from the tapered surface 225b. The second guide hole 262a is recessed from the position on the front surface 215a side to the blade side surface 231a side from the tapered surface 225a in the main member side surface 222a of the first member 210a. The first guide rod 261a provided in the first member 210a and the second guide hole 262a formed in the first member 210a both extend in a direction parallel to the front surface 215a and the rear surface 216a of the first member 210a. ing. The second guide rod 261b provided in the second member 210b and the first guide hole 262b formed in the second member 210b both extend in a direction parallel to the front surface 215b and the rear surface 216b of the second member 210b. ing.

  The tapered surface 225a of the first member 210a is formed between the first guide rod 261a and the second guide hole 262a of the first member 210a. The tapered surface 225b of the second member 210b is formed between the second guide rod 261b and the first guide hole 262b of the second member 210b.

  Here, the first guide rod 261a of the first member 210a is inserted into the first guide hole 262b of the second member 210b, and the second guide rod 261b of the second member 210b is inserted into the second guide hole 262a of the first member 210a. Consider the inserted assembly state.

  In this assembled state, the first guide rod 261a, the second guide rod 261b, the first guide hole 262b, the second guide hole 262a, the front surface 215a and the rear surface 216a of the first member 210a, the front surface 215b and the rear surface of the second member 210b. 216b are parallel to each other.

  In this assembled state, the tapered surface 225a of the first member 210a and the tapered surface 225b of the second member 210b are opposed to each other.

  The separation mechanism 250 includes a tapered surface 225a of the first member 210a, a tapered surface 225b of the second member 210b, and a wedge 151. The wedge 151 is disposed between the tapered surface 225a of the first member 210a and the tapered surface 225b of the second member 210b in the assembled state. The wedge 151 has a first wedge surface 152a and a second wedge surface 152b. The angle formed by the second wedge surface 152b with respect to the first wedge surface 152a is substantially equal to the angle formed by the tapered surface 225b of the second member 210b with respect to the tapered surface 225a of the first member 210a in the assembled state. .

  The wedge 151 of the first removal device 100 and the wedge 151 of the second removal device 200 are the same. For this reason, the angle of the tapered surface 225b of the second member 210b with respect to the tapered surface 225a of the first member 210a in the assembled state in the second detaching device 200 is the first in the assembled state in the first detaching device 100. The angle of the tapered surface 125b of the second member 110b with respect to the tapered surface 125a of the member 110a is substantially equal.

  Note that the wedge of the second removal device 200 may not be the same as the wedge 151 of the first removal device 100. In this case, the angle of the tapered surface 225b of the second member 210b with respect to the tapered surface 225a of the first member 210a in the assembled state in the second removing device 200 is the first in the assembled state in the first removing device 100. The angle of the tapered surface 125b of the second member 110b may not be equal to the tapered surface 125a of the member 110a.

"Embodiment of a method for removing a stationary blade"
An embodiment of a method for removing the stationary blade 40 will be described with reference to a flowchart shown in FIG.

  First, the first removal device 100 and the second removal device 200 described above and the buffer plate 170 are prepared (S1: preparation step).

  Next, as shown in FIGS. 5 to 7, the first member 110 a and the second member of the first removal device 100 are disposed between the first stator blade 40 a and the second stator blade 40 b adjacent in the circumferential direction Dc. 110b and the buffer plate 170 are arranged (S2a: first arrangement step).

  In the first arrangement step (S2a), first, the buffer plate 170 is wound around the wing body 41 of the first stationary blade 40a so that almost the entire ventral side surface 44 of the first stationary blade 40a is covered. Further, the buffer plate 170 is wound around the wing body 41 of the second stationary blade 40b so that substantially the entire back side 45 of the second stationary blade 40b is covered.

  Next, the first member 110a is disposed between the first stationary blade 40a and the second stationary blade 40b. At this time, as shown in FIGS. 5 and 7, the ventral side facing surface 132a of the first member 110a is opposed to the blade root side (radially outer side Dro) portion of the ventral side surface 44 of the first stationary blade 40a. At the same time, the blade root facing surface 114a of the first member 110a is opposed to the gas path surface 51 of the first stationary blade 40a. Further, as shown in FIG. 6, the front regulating surface 115 a of the first member 110 a is opposed to the front side surface 63 of the divided holding ring 60, and the rear regulating surface 116 a of the first member 110 a is arranged on the rear side surface 64 of the divided holding ring 60. To face. The front regulating surface 115a of the first member 110a contacts the front side surface 63 of the split holding ring 60. The rear regulating surface 116a of the first member 110a contacts the rear side surface 64 of the divided holding ring 60. The front side surface 63 and the rear side surface 64 of the divided holding ring 60 are perpendicular to the axial direction Da and extend in the circumferential direction Dc. For this reason, when the first member 110a is arranged as described above, the front regulating surface 115a and the rear regulating surface 116a of the first member 110a also extend in the circumferential direction Dc perpendicular to the axial direction Da. Therefore, the first guide rod 161a and the second guide groove 162a of the first member 110a also extend in the circumferential direction Dc in a plane perpendicular to the axial direction Da.

  Next, the second member 110b is disposed between the first stator blade 40a and the second stator blade 40b. At this time, as shown in FIGS. 5 and 7, the back-side facing surface 132b of the second member 110b is made to face the blade root side (radially outer side Dro) portion of the back side surface 45 of the second stationary blade 40b. At the same time, the blade root facing surface 114b of the second member 110b is opposed to the gas path surface 51 of the second stationary blade 40b. Further, as shown in FIG. 6, the front regulating surface 115 b of the second member 110 b is opposed to the front side surface 63 of the divided holding ring 60, and the rear regulating surface 116 b of the second member 110 b is arranged on the rear side surface 64 of the divided holding ring 60. To face. The front regulating surface 115b of the second member 110b contacts the front side surface 63 of the divided holding ring 60. The rear regulating surface 116 b of the second member 110 b contacts the rear side surface 64 of the divided holding ring 60. Further, the second guide rod 161b of the second member 110b is inserted into the second guide groove 162a of the first member 110a, and the first guide rod 161a of the first member 110a is inserted into the first guide groove 162b of the second member 110b. Put in. When inserting the second guide rod 161b of the second member 110b into the second guide groove 162a of the first member 110a, as shown in FIGS. 4 and 6, the second guide rod 161b on the radially inner side surface 118a of the first member 110a. The second guide rod 161b is inserted from the opening of the guide groove 162a. In addition, when the first guide rod 161a of the first member 110a is inserted into the first guide groove 162b of the second member 110b, the opening of the first guide groove 162b on the rear radial direction outer side surface 113b of the second member 110b. Insert the first guide rod 161a. That is, in this embodiment, the 2nd member 110b can be assembled | attached with respect to the arrange | positioned 1st member 110a by moving the 2nd member 110b from radial direction inner side Dri to radial direction outer side Dro.

  With the above, the second member 110b is arranged between the first stator blade 40a and the second stator blade 40b, and is assembled to the already-arranged first member 110a, and the first arrangement step (S2a) is completed. To do. In this state, the first guide rod 161a and the second guide groove 162a of the first member 110a also extend in the circumferential direction Dc in a plane perpendicular to the axial direction Da. Further, the buffer plate 170 is sandwiched between the abdominal side surface 44 of the first stationary blade 40a and the abdominal side facing surface 132a of the first member 110a, and the back side surface 45 of the second stationary blade 40b is opposed to the back side of the second member 110b. The buffer plate 170 is sandwiched by the surface 132b.

  When the blade body 41 of the stationary blade 40 is pushed in the circumferential direction Dc, it is applied to the stationary blade 40 even if the blade body 41 is pushed with the same force by pushing the blade root side of the blade body 41 rather than the tip side of the blade body 41. The moment can be reduced. For this reason, in this embodiment, the opposing surfaces 132a and 132b of the members 110a and 110b are opposed to the blade root side portion of the wing body 41. In the present embodiment, in the assembled state of the first member 110a and the second member 110b, the dimension in the circumferential direction Dc of the combination of the first member 110a and the second member 110b is that of each of the members 110a and 110b. The facing surfaces 132a and 132b are set so as to face the blade root 50 side portion of the blade body 41.

  By the way, the separation dimension in the circumferential direction Dc between the blade body 41 of the first stator blade 40a and the blade body 41 of the second stator blade 40b is smaller on the tip side than on the blade root side. In other words, the distance dimension is smaller on the radially inner side Dri than on the radially outer side Dro. For this reason, inserting the first member 110a and the second member 110b in an assembled state from the radially inner side Dri between the blade body 41 of the first stator blade 40a and the blade body 41 of the second stator blade 40b is not possible. Difficult or impossible.

  In the present embodiment, the guide grooves 162a and 162b are formed in portions where the guide rods 161a and 161b are inserted. Therefore, in the present embodiment, as described above, even if the second member 110b is moved in the radial direction Dr instead of the circumferential direction Dc in which the guide rods 161a and 161b extend, the guide rods 161a and 161b are moved. Can be put in each of the guide grooves 162a and 162b. Therefore, in the present embodiment, the first member 110a and the second member 110b are individually provided on the blade root side portion between the blade body 41 of the first stator blade 40a and the blade body 41 of the second stator blade 40b. Can be placed.

  Next, the separation mechanism 150 moves the first member 110a relatively away from the second member 110b (S3a: first separation step). Specifically, with the first wedge surface 152a of the wedge 151 in contact with the tapered surface 125a of the first member 110a and the second wedge surface 152b of the wedge 151 in contact with the tapered surface 125b of the second member 110b, This wedge 151 is driven into the blade root side. When the wedge 151 is driven, a force for separating the first member 110a and the second member 110b acts on the first member 110a and the second member 110b. Therefore, the force which separates both acts also on the 1st stator blade 40a and the 2nd stator blade 40b. As a result, the first stationary blade 40a moves in a direction relatively away from the second stationary blade 40b. In this movement process, the first member 110a moves in the circumferential direction Dc in which the guide rods 161a and 161b and the guide grooves 162a and 162b extend.

  In the present embodiment, the impact force driven by the wedge 151 acts on the blade body 41 of the first stator blade 40a and the blade body 41 of the second stator blade 40b via the first member 110a and the second member 110b. The change in the surface shape of the wing body 41 greatly affects the performance of the compressor 30. For this reason, in this embodiment, the buffer plate 170 is arrange | positioned between the 1st member 110a and the 1st stator blade 40a, and between the 2nd member 110b and the 2nd stator blade 40b, and the 1st stator blade The impact force acting on the wing body 41 of the 40a and the wing body 41 of the second stationary blade 40b is reduced.

  By the way, as shown in FIG. 5, when a force F acts on the ventral side surface 44 of the first stationary blade 40a from the ventral-side facing surface 132a of the first member 110a, the first member 110a from the ventral side surface 44 of the first stationary blade 40a. The reaction force N acts on the ventral facing surface 132a. This reaction force N is a force perpendicular to the tangent to the ventral side surface 44. A tangent to the ventral side 44 is inclined with respect to the axial direction Da. Therefore, the direction of action of the reaction force N is a direction inclined with respect to the circumferential direction Dc. That is, the acting direction of the reaction force N includes the axial direction Da component in addition to the circumferential direction Dc component. In other words, a force inclined with respect to the circumferential direction Dc acts between the first member 110a and the first stationary blade 40a. For this reason, when the first member 110a receives the reaction force N, the first member 110a also tries to move in the axial direction Da. Therefore, in the present embodiment, a guide mechanism 160 is provided to restrict the relative movement direction of the first member 110a to the second member 110b in the circumferential direction Dc. Further, in the present embodiment, the front regulating surface 115a of the first member 110a is brought into contact with the front side surface 63 of the divided holding ring 60, and the rear regulating surface 116a of the first member 110a is brought into contact with the rear side surface 64 of the divided holding ring 60. Thus, the relative movement direction of the first member 110a with respect to the divided holding ring 60 is restricted to the circumferential direction Dc.

  The reaction direction of the reaction force N is determined by the line segment L connecting the contact point Ca between the virtual circle C and the ventral facing surface 132a described above with reference to FIG. 5 and the contact point Cb of the virtual circle C and the back facing surface 132b. Approximate the extending direction. For this reason, in this embodiment, the first guide bar 161a and the second guide bar 161b are inclined with respect to the line segment L so that the first guide bar 161a, the second guide bar 161b, and the like extend in the circumferential direction Dc. Yes.

  Further, the acting direction of the force F received by the first stationary blade 40a from the first member 110a is also a force inclined with respect to the circumferential direction Dc. More specifically, the direction of the force F includes a component toward the axial upstream side Dau in addition to the circumferential direction Dc component. For this reason, the first stationary blade 40a tends to move also in the axial upstream Dau with respect to the first member 110a. Therefore, in the present embodiment, the front edge side facing portion 133a on the ventral side facing surface 132a of the first member 110a is opposed to the front edge portion 42a of the wing body 41 including the front edge 42 of the wing body 41 in the first stationary blade 40a. Thus, the first stator blade 40a is restricted from moving toward the axial upstream Dau with respect to the first member 110a.

  When the first separation step (S3a) is completed, the first member 110a and the second member 110b are removed from between the first stator blade 40a and the second stator blade 40b (S4a: first arrangement release step). When the first separation step (S3a) is finished, the interval in the circumferential direction Dc between the first stator blade 40a and the second stator blade 40b is widened. For this reason, in this 1st arrangement | positioning cancellation | release process (S4a), the 1st member 110a and the 2nd member 110b can be removed with the assembly state from between the 1st stator blade 40a and the 2nd stator blade 40b.

  Next, as shown in FIGS. 8 and 9, the first member 210a and the second member 210b of the second removal device 200 are disposed between the first stator blade 40a and the second stator blade 40b (S2b). : 2nd arrangement | positioning process).

  In the second arrangement step (S2b), first, the first member 210a and the second member 210b of the second removal device 200 are put into an assembled state. That is, the first guide rod 261a of the first member 210a is put into the first guide hole 262b of the second member 210b, and the second guide rod 261b of the second member 210b is put into the second guide hole 262a of the first member 210a.

  By performing the first separation step (S3a), the ventral end surface 55 of the blade root 50 of the first stationary blade 40a and the back side end surface 56 of the blade root 50 of the second stationary blade 40b are separated in the circumferential direction Dc. . Therefore, here, the assembled first member 210a and second member 210b are disposed between the blade root 50 of the first stationary blade 40a and the blade root 50 of the second member 210b. At this time, the opposing surface 232a of the first member 210a is opposed to the ventral end surface 55 of the blade root 50 of the first stationary blade 40a, and the opposing surface 232b of the second member 210b is opposed to the blade root 50 of the second stationary blade 40b. It is made to oppose the back side end surface 56. FIG. Further, the radially outer surfaces 211 a and 211 b of the first member 210 a and the second member 210 b are brought close to the groove bottom surface 77 of the split holding ring 60. As described above, when the assembled first member 210 a and second member 210 b are put into the groove 70 of the split holding ring 60, the front surfaces 215 a and 215 b of the first member 210 a and second member 210 b are connected to the split holding ring 60. While contacting the front opening surface 73, the rear surfaces 216a and 216b of the first member 210a and the second member 210b contact the rear opening surface 74 of the split holding ring 60. The front opening surface 73 and the rear opening surface 74 of the split holding ring 60 are perpendicular to the axial direction Da and extend in the circumferential direction Dc. Therefore, when the first member 210a and the second member 210b are arranged as described above, the first guide rod 261a and the second guide hole 262a of the first member 210a, the second guide rod 261b of the second member 210b and the second One guide hole 262b extends in the circumferential direction Dc in a plane perpendicular to the axial direction Da.

  Next, the separation mechanism 250 moves the first member 210a relatively away from the second member 210b (S3b: second separation step). Specifically, with the first wedge surface 152a of the wedge 151 in contact with the tapered surface 225a of the first member 210a and the second wedge surface 152b of the wedge 151 in contact with the tapered surface 225b of the second member 210b, This wedge 151 is driven into the blade root side. When the wedge 151 is driven, a force for separating the first member 210a and the second member 210b acts on the first member 210a and the second member 210b. Therefore, the force which separates both acts also on the 1st stator blade 40a and the 2nd stator blade 40b. As a result, the first stationary blade 40a moves in a direction relatively away from the second stationary blade 40b. In this movement process, the first member 210a moves with respect to the second member 210b in the circumferential direction Dc in which the guide rods 261a and 261b and the guide holes 262a and 262b extend. Further, the front surfaces (restricting surfaces) 215a and 215b of the first member 210a and the second member 210b are in contact with the front opening surface 73 of the split holding ring 60, and the rear surfaces (restricting surfaces) of the first member 210a and the second member 210b. Surface) 216a and 216b are in contact with the rear opening surface 74 of the divided holding ring 60, and therefore the first member 210a has a circumference in which the front opening surface 73 and the rear opening surface 74 extend with respect to the divided holding ring 60. Move in direction Dc.

  Even if the first stationary blade 40a is firmly fixed to the divided holding ring 60 by the execution of the second separation step (S3b), the first stationary blade 40a is easily arranged in the circumferential direction Dc with respect to the divided holding ring 60. Will be able to move to.

  When the second separation step (S3b) is completed, the first member 210a and the second member 210b are moved to the radially inner side Dri, and the first member 210a and the second stator blade 40b are interposed between the first stator blade 40a and the second stator blade 40b. The second member 210b is removed (S4b: second arrangement releasing step).

  Next, the first stationary blade 40 a that can be easily moved in the circumferential direction Dc with respect to the divided holding ring 60 is moved in the circumferential direction Dc, and the first static blade that has been contained in the groove 70 of the divided holding ring 60. The blade root 50 of the blade 40a is taken out from the blade root inlet / outlet 69 (see FIG. 3) of the split holding ring 60 (S5: stationary blade extraction step). This completes the removal of the first stationary blade 40a. Hereinafter, if necessary, the other stationary blades 40 are also detached from the split retaining ring 60 in the same procedure as described above. However, when the other stationary blades 40 are continuously removed, it is not necessary to perform the preparation step (S1) again.

  As described above, in the present embodiment, the second stationary blade 40b is moved by moving the first members 110a and 210a relatively away from the second members 110b and 210b by the separation mechanisms 150 and 250. In contrast, the first stationary blade 40a moves in a direction away from each other. Therefore, in this embodiment, the stationary blade 40 can be easily moved relative to the divided holding ring 60. Moreover, in the present embodiment, the movement direction of the first members 110a and 210a with respect to the divided holding ring 60 is restricted to the circumferential direction Dc, and the relative movement direction of the first members 110a and 210a with respect to the second members 110b and 210b is circumferential. Since it is restricted to Dc, the stationary blade 40 can be moved relative to the split retaining ring 60 more easily.

  Furthermore, in this embodiment, even if the first stator blade 40a is firmly fixed to the groove 70, the first stator blade 40a is circumferentially moved with respect to the groove 70 in the execution of the second separation step (S3b). It becomes easy to move to Dc.

  In the present embodiment, the stationary blade 40 is moved in the separation direction by pushing the stationary blade 40 in the separation direction via the first members 110a and 210a or the second members 110b and 210b. 40 damage can be suppressed. Moreover, in the present embodiment, in the first arrangement step (S2a), between the abdominal side surface 44 of the first stationary blade 40a and the abdominal side facing surface 132a of the first member 110a, and the back side surface 45 of the second stationary blade 40b. Since the buffer plate 170 is disposed between the second member 110b and the back-side facing surface 132b of the second member 110b, damage to the blade surface during the first separation step (S3a) of the blade surface can be suppressed.

  If the first stator blade 40a can be easily moved in the circumferential direction Dc with respect to the divided retaining ring 60 by executing the first separation step (S3a), the second arrangement step (S2b), the second There is no need to perform the two separation step (S3b) and the second disposition process (S4b).

  In the above embodiment, the blade set includes the first removal device 100, the divided holding ring 60, and the plurality of stationary blades 40. Moreover, this wing | blade set may have the 2nd removal apparatus 200 further as needed.

"First variation of separation mechanism"
With reference to FIG. 11, the 1st modification of the separation mechanism 150 in the 1st removal apparatus 100 is demonstrated.

  The separation mechanism 150a of the present modification includes a tapered surface 125a of the first member 110a, a tapered opposing surface 125ba of the second member 110ba, and a wedge 151a. The first member 110a in this modification has the same shape as the first member 110a of the above-described embodiment, and has the aforementioned tapered surface 125a. On the other hand, the second member 110ba in this modification is partly different from the shape of the second member 110b of the above embodiment, and does not have the tapered surface 125b, but instead has the tapered facing surface 125ba described above. The taper facing surface 125ba faces the taper surface 125a of the first member 110a in the assembled state of the first member 110a and the second member 110ba. Further, the taper facing surface 125ba is substantially perpendicular to the blade root facing surface 114b.

  The wedge 151a has a first wedge surface 152a and a second wedge surface 152ba. The angle formed by the second wedge surface 152ba with respect to the first wedge surface 152a is substantially the same as the angle formed by the tapered opposing surface 125ba of the second member 110ba with respect to the tapered surface 125a of the first member 110a in the assembled state. equal.

  Also in this modified example, in the first separation step (S3a), the first wedge surface 152a of the wedge 151a is brought into contact with the tapered surface 125a of the first member 110a, and the second wedge surface 152ba of the wedge 151a is moved in the first separation step (S3a). The wedge 151a is driven into the blade root side in a state where the second member 110ba is in contact with the taper facing surface 125ba of the second member 110ba. As a result, a force that separates both the first member 110a and the second member 110ba acts, and the first stator blade 40a moves relative to the second stator blade 40b.

  In this modification, the angle formed by the second wedge surface 152ba with respect to the first wedge surface 152a of the wedge 151a can be reduced. For this reason, the width of the wedge 151a of this modification can be made smaller than the width of the wedge 151 of the above embodiment. Therefore, even when the distance dimension in the circumferential direction Dc between the tip of the blade body 41 of the first stator blade 40a and the tip of the blade body 41 of the second stator blade 40b is narrow, the wedge 151a can be easily passed between them. it can.

  In this modification, the taper surface 125a is formed on the first member 110a, and the taper facing surface 125ba is formed on the second member 110ba. However, a taper facing surface may be formed on the first member, and a taper surface may be formed on the second member.

  Further, the separation mechanism 150 a of this modification is a modification of the separation mechanism 150 in the first removal apparatus 100. However, the separation mechanism 250 in the second removal apparatus 200 may also be configured in the same manner as in this modification.

"Second variation of separation mechanism"
With reference to FIG. 12, the 2nd modification of the separation mechanism 150 in the 1st removal apparatus 100 is demonstrated.

  The separation mechanism 150x of this modification has a hydraulic cylinder 153. The hydraulic cylinder 153 includes a cylinder casing 154 and a cylinder head 155 that moves relative to the cylinder casing 154.

  The first member 110ax includes a radial outer side surface 111a, a radial inner side surface 118a, and a blade side surface 131a similar to the first member 110a of the above embodiment. The second member 110bx also has a radially outer side surface 111b, a radially inner side surface 118b, and a blade side surface 131b similar to the second member 110b of the above embodiment. A head receiving surface 125ax that is in contact with the cylinder head 155 is formed on the member side surface 121a side of the first member 110ax of the present modification. A storage groove 125bx for storing the cylinder casing 154 is formed on the side surface 121b of the second member 110bx.

  In this modification, the first separation step (S3a) is executed by driving the hydraulic cylinder 153 after the first arrangement step (S2a), as in the above embodiment.

  In this modification, the hydraulic cylinder 153 is used as the separation mechanism 150x, but another actuator such as a pneumatic cylinder or an electromagnetic actuator may be used. Moreover, this modification is a modification of the separation mechanism 150 in the first removal apparatus 100 as described above. However, as for the separation mechanism 250 in the second detaching apparatus 200, an actuator may be used as in this modification.

“Third Modification of Separation Mechanism”
With reference to FIG. 13, the 3rd modification of the separation mechanism 150 in the 1st removal apparatus 100 is demonstrated.

  The separation mechanism 150y of this modification has both screw bolts 156, a first screw hole 125ay formed in the first member 110ay, and a second screw hole 125by formed in the second member 110by. Both screw bolts 156 have a first male screw portion 157a, a second male screw portion 157b, and a bolt head portion 158. The screw axis of the first male screw part 157a and the screw axis of the second male screw part 157b are located on the same straight line. The bolt head 158 is formed between the first male screw portion 157a and the second male screw portion 157b. The second male screw portion 157b is a reverse screw with respect to the first male screw portion 157a.

  The first member 110ay includes a radially outer side surface 111a, a radially inner side surface 118a, and a blade side surface 131a similar to the first member 110a of the above embodiment. The second member 110by also has a radially outer side surface 111b, a radially inner side surface 118b, and a blade side surface 131b similar to the second member 110b of the above embodiment. A first screw hole 125ay that is recessed toward the blade side surface 131a is formed on the member side surface 121a side of the first member 110ay. The first screw hole 125ay is a screw hole into which the first male screw portion 157a of both screw bolts 156 can be screwed. A second screw hole 125by that is recessed toward the blade side surface 131b is formed on the member side surface 121b side of the second member 110by. The second screw hole 125by is a screw hole into which the second male screw portion 157b of both screw bolts 156 can be screwed.

  In the present modification, after the first arrangement step (S2a), the bolt heads 158 of both screw bolts 156 are operated with a tool, and the both screw bolts 156 are rotated, as in the above embodiment, the first separation step (S3a ) Is executed.

  In this modification, both screw bolts 156 are used as the separation mechanism 150y, but a general single screw bolt may be used. In this case, a male screw hole is formed in one member of the first member 110a and the second member 110b, and on the other hand, a part of the single screw bolt is rotatable, and the single screw bolt is moved in the screw axial direction Da. A support hole or a support groove that is impossiblely supported is formed. Moreover, this modification is a modification of the separation mechanism 150 in the first removal apparatus 100 as described above. However, both the screw bolts 156 or the single screw bolts may be used for the separation mechanism 250 in the second detaching apparatus 200 as in this modification.

"First modification of first member and second member"
With reference to FIG. 14, the 1st modification of the 1st member 110a and the 2nd member 110b in the 1st removal apparatus 100 is demonstrated.

  In the first member 110a and the second member 110b in the embodiment, the tapered surfaces 125a and 125b are provided between the first guide surfaces (first surfaces) 126a and 126b and the second guide surfaces (second surfaces) 127a and 127b. Is formed. On the other hand, the first guide surfaces 126a and 126b and the second guide surfaces 127a and 127b are not formed on the first member 110ab and the second member 110bb in this modification. That is, the member side surfaces 121ab and 121bb of the first member 110ab and the second member 110bb in this modification have main member side surfaces 122ab and 122bb and tapered surfaces 125a and 125b, and the first guide surface 126a in the above embodiment. 126b and second guide surfaces 127a and 127b. Therefore, the member side surfaces 121ab and 121bb of the first member 110ab and the second member 110bb in this modification are flat surfaces except for the tapered surfaces 125a and 125b, and the first guide rod 161a and the second guide rod 161b are The surface is perpendicular to the extending direction.

  As described above, in the present modification, the member side surfaces 121ab and 121bb of the first member 110ab and the second member 110bb are simplified, so that the manufacturing costs of the first member 110ab and the second member 110bb can be suppressed.

  Further, the opposing surface 132bb of the second member 110bb in this modified example, that is, the rear edge side opposing portion 134bb of the back side opposing surface 132bb, is a portion of the rear edge 43 of the wing body 41 and the portion of the rear side surface 45 on the rear edge 43 side. Opposing rear edge 43a is included. The rear edge portion 43a of the wing body 41 forms a convex curved surface. For this reason, the trailing edge side facing portion 134bb has a concave curved surface that is the inverted shape of the convex curved surface. The front edge side facing portion 133b in the back side facing surface 132bb faces the front portion 42a that is a portion of the front side Dau rather than the rear edge portion 43a in the back side surface 45 of the wing body 41, as in the above embodiment. The front edge portion 42a on the back side surface 45 forms a convex curved surface. For this reason, the front edge side facing portion 133b in the back facing surface 132bb forms a concave curved surface that is an inverted shape of the convex curved surface.

  As described above, the acting direction of the force received by the first stationary blade 40a from the first member 110ab and the acting direction of the second stationary blade 40b received from the second member 110bb are forces inclined with respect to the circumferential direction Dc. . For this reason, the second stationary blade 40b tends to move not only in the circumferential direction Dc but also in the axial downstream Dad with respect to the second member 110bb. Therefore, in the present modification, the trailing edge side facing portion 134bb of the back side facing surface 132bb of the second member 110a is opposed to the trailing edge portion 43a of the blade body 41 including the trailing edge 43 of the blade body 41 of the second stationary blade 40b. Thus, the second stator blade 40b is restricted from moving toward the axially upstream side Dad with respect to the second member 110b.

"Second modification of first member and second member"
With reference to FIG. 15, the 2nd modification of the 1st member in the 1st removal apparatus 100 and a 2nd member is demonstrated.

  The member side surfaces 121ac and 121bc of the first member 110ac and the second member 110bc of the present modification include front member side surfaces 122a and 122b, tapered surfaces 125ac and 125bc, rear member side surfaces 123a and 123b, and inclined surfaces 128a and 128b. Have. The rear member side surfaces 123a and 123b are formed on the rear side Dad at intervals with respect to the front member side surfaces 122a and 122b, as in the above embodiment. The inclined surfaces 128a and 128b are formed between the front member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b in order to connect the front member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b.

  The front member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b are surfaces that are perpendicular to the direction in which the first guide bar 161a and the second guide bar 161b extend. In the first member 110ac, the rear member side surface 123a is located closer to the blade side surface 131a than the front member side surface 122a. In the second member 110bc, the rear member side surface 123a is located on the opposite side of the wing side surface 131b with respect to the front member side surface 122a. Therefore, the inclined surfaces 128a and 128b connecting the member side surfaces 122a and 122b and the rear member side surfaces 123a and 123b are surfaces perpendicular to the radial inner side surfaces 118a and 118b, but the first guide rod 161a and the second guide rod. The surface is inclined with respect to the direction in which 161b extends and is also inclined with respect to a surface perpendicular to the direction in which the first guide rod 161a and the second guide rod 161b extend.

  Tapered surfaces 125ac and 125bc are formed in the inclined surfaces 128a and 128b. The tapered surfaces 125ac and 125bc are inclined so as to gradually move away from the blade side surfaces 131a and 131b as they approach the radially outer side surfaces (groove bottom facing surfaces) 111a and 111b from the radially inner side surfaces 118a and 118b.

  Here, the direction along the tapered surfaces 125ac and 125bc and approaching the radially outer surfaces (groove bottom facing surfaces) 111a and 111b with the shortest distance is defined as a tapered inclination direction Dti. Further, a direction perpendicular to the taper inclination direction Dti and along the taper surfaces 125ac and 125bc is defined as a taper extending direction Dte. Since the tapered surfaces 125ac and 125bc are formed in the inclined surfaces 128a and 128b as described above, the taper extending direction Dte is in the direction in which the first guide rod 161a and the second guide rod 161b extend. The direction is inclined and also inclined to a plane perpendicular to the direction in which the first guide bar 161a and the second guide bar 161b extend. In other words, the taper extending direction Dte on the tapered surfaces 125ac, 125bc of the present modification is a direction inclined with respect to the axial direction Da and the circumferential direction Dc.

  As described above, in this modification, the taper extending direction Dte on the tapered surfaces 125ac and 125bc is a direction intersecting the axial direction Da and the circumferential direction Dc. It becomes easy to apply a force perpendicular to the blade surface of the wing body 41 whose string is inclined.

  In this modified example, as in the first modified example, the rear edge side facing portion 134bb on the back side facing surface 132bb includes a rear edge 43 of the wing body 41 and a rear edge 43 side portion on the back side surface 45. Opposite the edge 43a. As described above, the rear edge portion 43a of the wing body 41 forms a convex curved surface. For this reason, the trailing edge side facing portion 134bb has a concave curved surface that is the inverted shape of the convex curved surface. The front edge side facing portion 133b in the back side facing surface 132bb faces the front edge portion 42a, which is a portion of the front side Dau rather than the rear edge portion 43a in the back side surface 45 of the wing body 41, as in the above embodiment.

"Other variations"
In the said embodiment, the buffer board 170 is arrange | positioned in the back side opposing surface 132b of the 1st member 110a in the 1st removal apparatus 100, and the back side opposing surface 132b of the 2nd member 110b. That is, in the said embodiment, the 1st member 110a and the 2nd member 110b in the 1st removal apparatus 100, and the buffer plate (buffer member) 170 are independent members. However, the first member and the buffer member may be integrated, and the second member and the buffer member may be integrated. In this case, for example, an intermediate product of the first member may be formed of steel or the like, and a buffer member formed of copper or the like may be attached or pressure-bonded to the opposite surface side of the intermediate product, and this may be used as the first member. In this case, the surface of the buffer member becomes the opposing surface of the first member.

  In the first detaching device 100 of the above embodiment, the facing surface of the first member 110a is a ventral facing surface 132a, and the facing surface of the second member 110b is a back facing surface 132b. However, the facing surface of the first member 110a may be a back facing surface, and the facing surface of the second member 110b may be a ventral facing surface.

  In the embodiment and each of the above-described modifications, the stationary blade 40 fitted in the groove 70 of the stationary blade holding ring (blade holding member) 36 is removed from the groove 70. However, when removing the moving blade fitted in the groove of the rotor shaft (blade holding member) 12 from the groove, the moving blade can be easily removed from the groove by using the same removal device as described above. The groove of the rotor shaft 12 extends in the circumferential direction Dc, like the groove 70 of the stationary blade holding ring 36. However, an opening is formed in the groove toward the axial direction Da or the radial direction Dr, and the blade root of the moving blade is drawn out from the groove.

  The said embodiment is an example which removes the stationary blade 40 in the compressor 30 of the gas turbine 1. FIG. However, the removal object of the present invention is not limited to the stationary blade 40 in the compressor 30 of the gas turbine 1. That is, if the blade roots of a plurality of stationary blades are fitted in grooves that are recessed toward the radially outer side Dro with respect to the axis Ar and extend in the circumferential direction Dc with respect to the axis Ar, the stationary blades may be targeted for removal.

  1: gas turbine, 2: gas turbine rotor, 5: gas turbine casing, 10: turbine, 11: turbine rotor, 12, 32: rotor shaft, 13, 33: moving blade row, 15: turbine casing, 17, 37: stationary blade row, 20: combustor, 30: compressor, 31: compressor rotor, 35: compressor casing, 36: stationary blade retaining ring (blade retaining member), 39: air compression flow path, 40: static Wings (or simply wings), 40a: first vane (or simply first wing), 40b: second vane (or simply second wing), 41: wing body, 42: leading edge, 42a: leading edge 43: rear edge, 43b: rear edge portion, 44: ventral side surface (positive pressure surface), 45: back side surface (negative pressure surface), 50: blade root, 51: gas path surface, 52: peripheral surface, 53a: first front end Surface, 53b: second front end surface, 54a: first rear end surface, 54b: second rear end surface, 55: ventral side end surface, 56: back side end surface, 57: bottom surface 58: front step surface, 59: rear step surface, 60: split retaining ring (blade holding member), 61: front inner peripheral surface, 62: rear inner peripheral surface, 63: front side surface, 64: rear side surface, 65: Outer peripheral surface, 66: splitting surface, 69: blade root entrance / exit, 70: groove, 73: front opening surface, 74: rear opening surface, 75: groove front side surface, 76: groove rear side surface, 77: groove bottom surface, 78: groove Front step surface, 79: Step surface after groove, 100: First removal device, 110a, 110ab, 110bc, 110ax, 110ay: First member, 110b, 110ba, 110bb, 110bc, 110bx, 110by: Second member, 111a , 111b: radially outer surface (groove bottom facing surface), 112a, 112b: front radially outer surface, 113a, 113b: rear radially outer surface, 114a, 114b: blade root facing surface, 115a, 115b: front regulating surface 116a, 116b Rear regulating surface, 118a, 118b: radially inner side surface, 121a, 121ab, 121ac, 121b, 121bb, 121bc: member side surface, 122a, 122b: front member side surface, 123a, 123b: rear member side surface, 125a, 125ac, 125b, 125bc: taper surface, 125ba: taper facing surface, 126a, 126b: first guide surface (first surface), 127a, 127b: second guide surface (second surface), 128a, 128b: inclined surfaces, 131a, 131b: Wing side, 132a: facing surface (abdominal facing surface), 132b: facing surface (back facing surface), 133a, 133b: leading edge facing portion, 134a, 134b, 134bb: trailing edge facing portion, 135a, 135b: front Blade side surface, 136a, 136b: rear blade side surface, 150, 150a, 150x, 150y: separation mechanism, 1, 151a: wedge, 153: hydraulic cylinder (actuator), 156: both screw bolts, 160: guide mechanism, 161a: first guide rod, 161b: second guide rod, 162a: second guide groove, 162b: first guide Groove, 170: buffer plate (buffer member), 200: second removing device, 210a: first member, 210b: second member, 211a, 211b: radially outer surface, 215: front surface (regulating surface), 216: Rear surface (regulating surface), 218a, 218b: radially inner side surface, 221a, 221b: member side surface, 222a, 222b: main member side surface, 225a, 225b: tapered surface, 250: separation mechanism, 260: guide mechanism, 261a: first One guide bar, 261b: second guide bar, 262a: second guide hole, 262b: first guide hole, Da: axial direction, Dau: upstream side (front side), Dad: downstream side (rear side), Dc: circumferential direction, Dcp: circumferential direction ventral side, Dcn: circumferential direction dorsal side, Dr: radial direction, Dri: radial direction inside, Dro: radial direction outside, Dti: taper inclination direction , Dte: taper extending direction

Claims (29)

In a plurality of blade removal devices in which a blade root is fitted in a groove recessed in a radial direction with respect to an axis and extending in a circumferential direction with respect to the axis,
Among the plurality of wings, disposed between the first wing and the second wing adjacent in the circumferential direction, and an opposing surface is formed that faces the surface on the second wing side among the outer surfaces of the first wing. A first member that is
A second member that is disposed between the first wing and the second wing, and is formed with an opposing surface that faces the surface on the first wing side among the outer surfaces of the second wing;
A separation mechanism that moves the first member in a direction relatively away from the second member;
Wing removal device comprising: The wing removal device according to claim 1,
A blade removing device comprising a guide mechanism for restricting a relative movement direction of the first member to the second member in the circumferential direction. The wing removal device according to claim 1 or 2,
One of the facing surfaces of the first member and the facing surface of the second member is opposed to the ventral side surface of the wing body in the wing, and corresponds to the shape of the ventral side surface, A part of which forms a ventral-side facing surface having a convex curved surface, the other facing surface faces the back side surface of the wing body in the wing, and has a concave curved surface corresponding to the shape of the back side surface. On the opposite side,
Wing removal device. The wing removal device according to claim 3,
The facing surface is opposed to a blade edge portion including a blade edge which is one edge of the front edge and the rear edge of the blade body in the wing and a portion of the facing surface on the blade edge side, Having a concave curved surface corresponding to the shape of the wing edge,
Wing removal device. The wing removal device according to claim 3 or 4,
The first member relative to the second member in the circumferential direction having an angle with respect to a line segment connecting the contact point between the ventral facing surface and the virtual circle and the contact point between the back facing surface and the virtual circle. Provided with a guide mechanism that regulates the moving direction,
Wing removal device. In the wing | blade removal apparatus of Claim 2 or 5,
The guide mechanism is fixed to at least one of the first member and the second member, and is formed on the other of the guide rod extending in the circumferential direction and the first member and the second member. A guide groove that is recessed in a radial direction with respect to the axis, and extends in the circumferential direction so that the guide rod can be inserted therethrough.
Wing removal device. The wing removal apparatus according to claim 6,
The guide mechanism is formed on the first member, the first guide rod as the guide rod fixed to the first member, the second guide rod as the guide rod fixed to the second member, and the first member. A second guide groove as the guide groove through which the second guide rod can be inserted; and a first guide groove as the guide groove formed in the second member and through which the first guide rod can be inserted. ,
The direction of the opening with respect to the groove bottom of the first guide groove is opposite to the direction of the opening with respect to the groove bottom of the second guide groove.
Wing removal device. The wing removal device according to claim 7,
The first guide bar is fixed to a region on one side of the first member in the axial direction in which the axis extends with respect to the facing surface, and the second guide groove into which the second guide bar enters is Of the first member, it is formed in a region on the other side in the axial direction with respect to the facing surface.
Wing removal device. The wing removal device according to claim 1,
The facing surface of the first member is a surface facing the blade root of the first wing, and the facing surface of the second member is a surface facing the blade root of the second wing.
Wing removal device. The wing removal device according to claim 9,
A guide mechanism for restricting a relative movement direction of the first member to the second member in the circumferential direction;
The guide mechanism is configured so that the facing surface of the first member faces the blade root of the first wing, and the facing surface of the second member faces the blade root of the second wing. Located between the root of the first wing and the root of the second wing,
Wing removal device. The apparatus for removing a wing according to claim 9 or 10,
A guide mechanism for restricting a relative movement direction of the first member to the second member in the circumferential direction;
The guide mechanism is fixed to at least one of the first member and the second member, and is formed on the other of the guide rod extending in the circumferential direction and the first member and the second member. A guide hole extending in the circumferential direction and allowing the guide rod to be inserted therethrough,
Wing removal device. The wing removal device according to claim 11,
The guide mechanism is formed on the first member, the first guide rod as the guide rod fixed to the first member, the second guide rod as the guide rod fixed to the second member, and the first member. A second guide hole as the guide hole through which the second guide rod can be inserted; and a first guide hole as the guide hole formed in the second member through which the first guide rod can be inserted. ,
The first guide rod is fixed to a region on one side in the axial direction in which the axis extends with respect to the facing surface of the first member, and the second guide hole is, of the first member, It is formed in a region on the other side in the axial direction with respect to the facing surface.
Wing removal device. In the wing | blade removal apparatus as described in any one of Claim 1 to 12,
The first member and the second member have a groove bottom facing surface that faces the groove bottom surface of the groove,
The separation mechanism is formed on at least one member of the first member and the second member, and has a tapered surface that gradually approaches the other member as it approaches the groove bottom facing surface of the one member. A wedge disposed between the taper surface and a taper facing surface facing the taper surface at the other member,
Wing removal device. The wing removal device according to claim 13,
The taper facing surface of the other member is a tapered surface that gradually approaches the one member as it approaches the groove bottom facing surface of the other member.
Wing removal device. The wing removal device according to claim 13 or 14,
The taper extending direction, which is a direction along the taper surface and perpendicular to the taper inclination direction approaching the groove bottom facing surface at the shortest distance and along the taper surface, is an axis along which the axis extends. Direction intersecting the direction and the circumferential direction,
Wing removal device. In the wing removal device according to any one of claims 13 to 15,
The one member has a first surface extending in a direction intersecting the axial direction in which the axis extends, and intersects the axial direction at a position shifted from the first surface in the axial direction and the circumferential direction. A second surface extending in a direction to be formed,
The other member has a first surface extending in a direction intersecting the axial direction, and a position shifted from the first surface of the other member in the axial direction and the circumferential direction with respect to the axial direction. And a second surface extending in a crossing direction,
The first surface of the other member is formed at a position that can face the first surface of the one member in the axial direction;
The second surface of the other member is formed at a position that can face the second surface of the other member in the axial direction;
The tapered surface is formed between the first surface and the second surface of the one member,
The taper facing surface is formed between the first surface and the second surface of the other member.
Wing removal device. In the wing | blade removal apparatus as described in any one of Claim 1 to 12,
The separation mechanism includes an actuator that generates a force for moving the first member in a direction of separating the first member relative to the second member.
Wing removal device. In the wing removal device according to any one of claims 1 to 17,
It is formed of a soft material softer than the first member and the second member, and between the first wing and the first surface of the first member, and between the second wing and the second member. A buffer member disposed between at least one of the second and the opposing surface;
Wing removal device. A wing removal device according to any one of claims 1 to 18,
A blade holding member in which the groove is formed;
The wings fitted in the grooves;
Wing set with. A jig composed of a pair of members, a first member and a second member, arranged between a plurality of blades adjacent in the circumferential direction,
The first member and the second member are spaced apart from each other and a convex surface corresponding to a concave curved surface on the ventral side surface of the wing or a concave curved surface corresponding to the convex curved surface on the back side surface of the wing. A separation mechanism that moves in a direction,
The said separation mechanism is a jig | tool containing the taper surface which is not parallel to the said opposing surface. The jig according to claim 20,
Jig having a guide rod and / or guide grooves extending in a direction along the facing surface substantially perpendicular to the plane. In the method for removing a plurality of blades, the blade roots are fitted in grooves that are recessed in the radial direction with respect to the axis and extend in the circumferential direction with respect to the axis,
Of the first wing and the second wing adjacent in the circumferential direction, a first member formed with an opposing surface facing a part of the outer surface of the first wing, and a part of the outer surface of the second wing A preparation step of preparing a detaching device comprising: a second member having a facing surface facing the first member; and a separation mechanism for moving the first member in a direction of separating the first member relative to the second member. When,
The opposing surface of the first member is made to face the second wing side surface of the first wing surface, and the second wing side surface of the second wing surface is made to face the second wing side surface. An arrangement step of opposing the opposing surfaces of the members;
A separation step of moving the first member in a direction relatively away from the second member by the separation mechanism;
Perform the wing removal method. The method of removing a wing according to claim 22,
The blade holding member in which the groove is formed is formed with a pair of surfaces extending in the circumferential direction and facing opposite sides in the axial direction in which the axis extends.
The first member and the second member are formed with restriction surfaces that contact the pair of surfaces in the execution of the arrangement process,
In the separation step, the first member is moved relative to the second member while the first member and the regulating surface of the second member are brought into contact with the pair of surfaces of the blade holding member.
How to remove the wing. The method of removing a wing according to claim 22 or 23,
The removal device includes a guide mechanism that regulates a relative movement direction of the first member with respect to the second member in a direction that becomes the circumferential direction by execution of the arrangement step.
How to remove the wing. The method of removing a wing according to claim 22 or 23,
In the preparation step, a first removal device as the removal device is prepared,
The arrangement step includes a first arrangement step of arranging the first removal device between the first wing and the second wing,
The separation step includes a first separation step of moving the first member in a direction of separating the first member relative to the second member by the separation mechanism of the first removal device after the first arrangement step. Including
In the first detaching device, one of the facing surfaces of the first member and the facing surface of the second member is the antinode of the wing body in the wing in the execution of the first arranging step. Opposite the side surface, corresponding to the shape of the ventral side surface, at least partly forms a ventral side opposing surface having a convex curved surface, and the other opposing surface is the wing of the wing in the execution of the first arrangement step Facing the back side of the body, corresponding to the shape of the back side, forming a back side facing surface having a concave curved surface,
How to remove the wing. The method of removing a wing according to claim 25,
The first removal device has an angle with respect to a line segment connecting a contact point between the ventral facing surface and the virtual circle and a contact point between the back facing surface and the virtual circle, and executes the first arrangement step. A first guide mechanism that regulates a relative movement direction of the first member with respect to the second member in the circumferential direction.
How to remove the wing. The method of removing a wing according to claim 26,
The first guide mechanism is fixed to at least one of the first member and the second member, and extends to the other of the guide member extending in the circumferential direction and the first member and the second member. A guide groove formed and recessed in a radial direction with respect to the axis, extending in the circumferential direction and allowing the guide rod to be inserted therethrough,
In the first arrangement step, one of the first member and the second member is arranged between the first wing and the second wing, and then the other member is moved in the radial direction. The other member is disposed between the first wing and the second wing, and the guide rod of the one member is placed in the guide groove of the other member.
How to remove the wing. The method for removing a wing according to any one of claims 25 to 27,
The blade root of the wing has an abdominal abdomen end surface in which a ventral side surface is formed with respect to a back side surface of the wing body in the wing, and a dorsal end surface facing the opposite side to the abdomen end surface. ,
In the preparation step, in addition to the first removal device as the removal device, a second removal device as the removal device is prepared,
The arrangement step includes a second arrangement step of arranging the first member and the second member in the second removal device between the first blade and the second blade after the first separation step. Including
In the separation step, the first member of the second removal device is moved with respect to the second member of the second removal device by the separation mechanism of the second removal device after the second arrangement step. Including a second separation step of moving in a relatively separating direction;
Of the opposing surface of the first member and the opposing surface of the second member in the second removal device, one opposing surface is on the ventral side end surface of the blade root of the first wing, A ventral-side facing surface that faces in the execution of the second placement step is formed, and the other facing surface faces the back-side end surface of the blade root in the second wing in the execution of the second placement step. A side facing surface,
How to remove the wing. The method of removing a wing according to any one of claims 22 to 28,
The first member and the second member have a groove bottom facing surface that faces the groove bottom surface of the groove,
The separation mechanism is formed on at least one member of the first member and the second member, and has a tapered surface that gradually approaches the other member as it approaches the groove bottom facing surface of the one member. A wedge disposed between the taper surface and a taper facing surface facing the taper surface at the other member,
In the separation step, the wedge is driven between the tapered surface and the tapered surface.
How to remove the wing.

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