JP2000217284A - Rotating electric machine stator - Google Patents

Abstract

(57) [Problem] To provide a stator having a configuration for preventing magnetic vibration of a stator of a rotating electric machine. further,
Provided is a highly reliable stator for a rotating electric machine having a configuration that enables inspection and investigation of a stator coil of the rotating electric machine in which magnetic vibration is generated. SOLUTION: A stator core 1 divided in a circumferential direction is provided.
A stator of a rotating electrical machine, comprising: a stator frame 5 spaced radially outward from the outer periphery of the stator core; and a stator frame joining plate 2 disposed between the stator core 1 and the stator frame 5. At
A stator for a rotating electric machine, characterized in that a vibration-proof stay 3 connected to a spring plate 4 is mounted on a radially outer side of a stator frame joining plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic vibration of a vertical rotating electric machine such as a water turbine generator, a generator motor, a variable speed generator motor, a synchronous phase adjuster, and a flywheel generator which constitute a stator core in a circumferential direction. The present invention relates to a stator core of a rotating electric machine which facilitates a prevention method and a magnetic vibration investigation during a main engine operation.

[0002]

2. Description of the Related Art In many cases, a stator core of a rotating electric machine of a hydraulic power plant is divided and transported together with a stator frame due to transportation restrictions accompanying construction of a hydroelectric power plant, and is integrally assembled on site. In this case, care is taken so that an inexorable liner or the like may be inserted into the stator core division surface to assemble without any gap. However, the stator core has a higher temperature than the stator frame due to iron loss due to excitation during operation, and internal stress is generated in the stator core in the circumferential direction due to thermal expansion. Under the influence of this heat cycle due to the shutdown, the insulating liner inserted in the stator core joint is damaged, and as a result, a gap is generated in the stator core division surface. The stator core having a gap in the stator division surface loses its rigidity as a ring, and generates magnetic vibration twice the power system frequency. If the operation is continued for many months, the magnetic vibration increases the gap between the stator core division surfaces, and the joint between the stator core punching key and the stator core mounted on the inner circumference of the stator also causes magnetic vibration. Abrasion occurs and a gap is generated.
Due to such a gap, magnetic vibration is generated at the same time when the main engine is started and excited, but when this is repeated, the vibration value increases and the slot wedges holding down the stator coil in the stator core due to the vibration and the stator are protruded and the stator is vibrated. Wear of the coil's insulation layer may occur, eventually leading to stator coil insulation damage ground faults. Therefore, various measures have been taken to prevent this harmful magnetic vibration.

Further, a configuration and a method for suppressing vibration and noise generated from the rotor for various reasons have been disclosed. For example, a configuration for suppressing vibration and noise transmitted from a stator core to a stator frame is disclosed in Japanese Utility Model Laid-Open Publication No. 61-195538.
The fastening wedge made of a vibration-proof material is used to prevent vibration and noise. According to this configuration, the vibration noise transmitted to the stator frame is suppressed by fitting a wedge made of a vibration-proof material between the iron core and the stator frame. Japanese Patent Laying-Open No. 4-364339 discloses a configuration in which a groove is provided on the outer peripheral surface of a stator core, and the groove is filled with a vibration damping member having a coefficient of thermal expansion larger than that of the stator core. With such a configuration, transmission of vibration generated due to a difference in magnetic attraction due to imbalance of the air gap is suppressed. 63-182647
Japanese Patent Application Publication No. JP-A-2005-115122 discloses a configuration in which a cutout portion of an iron core is pressed with a tip end of a screw screwed into a frame to prevent magnetic vibration. With such a configuration, by forcibly deforming the annular portion and the frame of the stator core to change the vibration mode and change the natural frequency, vibration generated by resonance is prevented. Further, Japanese Patent Application Laid-Open No. 5-304742
In the publication, a rib fitted to a key groove provided in an outer peripheral direction of a core, a plurality of core support plates fixed to the rib, and a central portion elastically supporting the core support plate on a partition plate are provided on the core support plate. There is disclosed a stator having a spring rod fixed to both ends and fixed to a partition plate. With this configuration, transmission of iron core magnetic vibration to the stator frame is prevented.

[0004] Two conventional countermeasures are generally taken as conventional countermeasures against magnetic vibration when a stator divided in the circumferential direction is used as the stator. That is,
In the first countermeasure, as shown in FIG. 15, wedges 44 are driven into the outer peripheral side of the stator core and the inner peripheral side of the stator frame shelf plate 33 in the rotating electric machine in which the stator core 1 is divided in the circumferential direction, A configuration is used in which external pressure is applied to the iron core to reduce the gap between the iron core joints. The second conventional countermeasure is to disassemble the existing stator core using a long outage such as overhaul or replacing the stator coil, etc., and fix the new stator core by reloading it to an endless core. This is a method of eliminating magnetic core vibration by eliminating the split surface of the iron core.

The inner diameter of the stator frame on which the stator core is mounted is made larger than the outer diameter of the stator core for the operation of laminating the stator core. There is a slight gap between the divided surfaces. In order to fill this gap, the stator frame joint plate is firmly bolted by inserting an insulating liner into the stator core division surface at the time of stator integral assembly on site, but if this insulating liner thickness is insufficient, Therefore, a gap remains in the stator frame and the outer periphery of the stator core. The stator core temperature rises and the stator core receives external pressure due to the temperature difference with the stator frame, and compressive force acts on the stator core division surface, but this gap is reduced to some extent, but does not reach zero completely . Even if the insulation liner thickness is sufficient, the stator core is divided by the effect of the heat cycle on the internal stress in the circumferential direction of the core caused by the temperature difference (difference in thermal expansion) between the stator core and stator frame during operation. Due to the movement of the face, the normal iron core mating face shown in FIG.
As shown in (b), the insulating liner is damaged as shown by the "E" part, and a gap is generated in the stator core division surface. FIG. 1 is an enlarged view of a portion "E" in which the insulating liner 45 is damaged and a gap is formed in the stator core dividing surface.
6 (c).

[0006] When a gap is formed in the stator core division surface, the stator core division surface is struck by an alternating magnetic flux during operation to generate magnetic vibration. As shown in FIG. 15, the magnetic vibration is caused by the outer circumferential surface of the stator core 1 and the stator frame shelf 3 in the assembled state.
3 can be temporarily reduced by driving the wedge 44 into the gap between the stator cores 1 and applying an external pressure to the stator core 1 to eliminate the gap between the stator core division surfaces. However, stator core 1
And the wedge 44 driven by the influence of the heat cycle of the stator frame and the continuous residual magnetic vibration adjusts, so that additional inspection is required every time the stopped state is checked, and a sufficient effect cannot be obtained permanently.

In addition, the location and method of magnetic vibration investigation during operation are limited due to electrical danger factors such as approaching a rotating body and charging. In particular, in order to quantitatively understand the effect of magnetic vibration on the stator coil installed in the stator core slot, the height of the air duct near both ends of the stator core at the stator coil end There is a problem that the vibration sensor cannot be mounted because of the lack of the vibration sensor. Therefore, it is difficult to investigate or determine the soundness of the stator coil in the mechanism that generates magnetic vibration.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stator having a configuration for preventing a magnetic vibration of a stator of a rotating electric machine. Still another object of the present invention is to provide a highly reliable stator of a rotating electric machine having a configuration that enables inspection and investigation of a stator coil of the rotating electric machine that may generate magnetic vibration.

[0009]

The above object of the present invention is achieved by a first configuration of the present invention. That is, in the first configuration of the present invention, a stator core divided in a circumferential direction, a stator frame spaced radially outward from an outer peripheral surface of the stator core, the stator core and the stator In a stator of a rotating electric machine including a stator frame joining plate disposed between frames, a vibration-proof stay connected to a spring plate is mounted radially outside the stator frame joining plate. The present invention provides a rotating electric machine stator. The above-described anti-vibration stay is fixed between a first support provided on the stator frame joining plate and a second support separated radially outward from the first support,
The second support may be attached to the spring plate via an attachment member.

[0010] The above-mentioned object of the present invention is achieved by a second configuration of the present invention. That is, in the second configuration of the present invention, a stator core divided in a circumferential direction, a stator frame spaced radially outward from an outer peripheral surface of the stator core, the stator core and the stator A stator for a rotating electrical machine including a stator frame joining plate disposed between frames, the stator having a compression ring mounted radially outside the stator core.

Further, the above-mentioned object of the present invention is achieved by a third configuration of the present invention. That is, the third aspect of the present invention
In the configuration of the above, in the stator of the rotating electric machine having the stator core divided in the circumferential direction, the rotation in which the epoxy-based insulating filler is disposed in the gap formed by the end portions of the stator core divided surfaces adjacent to each other. An electric machine stator is provided.

Further, the above-mentioned object of the present invention is achieved by a fourth configuration of the present invention. That is, in the fourth configuration of the present invention, a stator of a rotating electric machine including a stator core divided in a circumferential direction and a stator frame radially outwardly separated from the outer peripheral surface of the stator core, This is achieved by providing a stator of a rotating electric machine including a conversion device for changing a direction of a thermal expansion force of the stator frame during operation of the rotating electric machine. The above conversion device may include a conversion member, the conversion member, and a jack disposed between the stator core and extending through the opening of the stator frame. Further, in the fourth configuration of the present invention, the conversion device may include a reaction force receiving base. Further, the above object of the present invention is achieved by a fifth configuration of the present invention. That is, in the fifth configuration of the present invention, in a stator of a rotating electrical machine including a stator core divided and configured in a circumferential direction, and a stator frame radially outwardly spaced from an outer peripheral surface of the stator core, A stator for a rotating electric machine, comprising: a stator core rib to which a key bar is fixed, a key fitted to the key bar, and a jack bolt for pressing the stator core through the key. You. The above-described object of the present invention is achieved by a sixth configuration of the present invention. That is,
In the sixth configuration of the present invention, in a rotating electric machine in which a stator core is configured in a circumferential direction, a stator of a stator of the rotating electric machine in which the height of air ducts at both ends of the stator core is higher than other air ducts is provided. Provided.

[0013]

FIG. 1 is a sectional side view of a first embodiment of the present invention. As shown in FIG. 1, the stator of the rotating electric machine according to the present invention includes a stator core 1, a stator frame joining plate 2,
Anti-vibration stay 3, spring plate 4, stator frame 5, first support 6 and second support 7 for holding anti-vibration stay 3
And This stator joining plate 2 is installed via a member on a step structure on the foundation. The stator core 1 is provided with ribs 8 having screws at both ends.
In the stator core 1, a clamp member 9 is fastened to the rib 8 by fastening means such as a nut from outside in the axial direction of the rotor and is clamped.

FIG. 2 is a sectional view taken along line AA of FIG. The plurality of stator frame joining plates 2 are arranged in the circumferential direction at least so as to correspond to the joint of the stator core 1. A first support 6 for supporting the anti-vibration stay 3 is attached to the stator joining plate 2.
Is bolted to the stator joining plate 2 via a member 10. The anti-vibration stay 3 is held between the first support 6 and a second support spaced radially outward from the first support 6. Further, the second support 7
Is connected to the spring plate 4 by a mounting member such as a bolt to prevent magnetic vibration. The spring plate 4 is attached to a holding member 11 held on a foundation so that appropriate spring plate deflection is generated according to the temperature.

An anti-vibration stay 3 connected to a spring plate 4 in which an appropriate spring plate deflection is generated in accordance with the temperature is provided between the solid foundation and the stator frame joining plate 2 so that the stator frame is fixed. An external force is applied to the joint plate 2, and the stator core 1 is pressed through the stator joint plate 2, and during operation, an inward force is continuously applied to the stator joint plate 2 to divide the stator core. It is configured to prevent or reduce magnetic vibration generated at the joint of the sub cores 1.

Further, in the present invention, the spring plate 4
It is configured such that appropriate spring plate deflection occurs according to the temperature. By disposing the anti-vibration stay 3 attached to the spring plate 4 between the solid foundation and the stator joining plate 2, an external force corresponding to a temperature change during the operation of the main engine is applied to the stator joining plate 2. , So that magnetic vibration can be prevented or reduced under a wide range of operating conditions.

FIG. 3 is a sectional side view of a second embodiment of the present invention. As shown in FIG. 3, the second embodiment of the present invention employs a configuration in which a compression ring 14 is mounted on the outer peripheral side of the stator core 1 in order to prevent magnetic vibration at the joint of the stator core 1. ing.

Referring to FIG. 3, a stator of a rotating electric machine according to a second embodiment of the present invention comprises a stator core 1, a stator frame joining plate 2, a stator frame 5, and a plurality of blocks 15. The stator core 1 extends circumferentially along the outer peripheral surface of the stator core 1.
And a compression ring 14 for compressing. These blocks 15 abut against the stator core 1 and compress the stator core 1 to apply external force to the stator core 1 from the outside, compress the joints of the divided stator cores 1, and apply magnetic force. Vibration is prevented. In addition, a groove 16 for fitting the compression ring 14 is formed in the block 15 on the outside in the radial direction.

FIG. 4 is a sectional view taken along line BB of FIG. As shown in FIG. 4, these blocks 1
Numerals 5 are provided on the compression ring 14 and are arranged at a constant distance in the circumferential direction except for each block adjacent to the stator frame joining plate 2 so that an external force is uniformly applied. The block 15 adjacent to the stator frame joining plate 2 is separated from the blocks 15 arranged at other positions at a different distance, and is divided into a stator core immediately adjacent to the stator frame joining plate 2. The external force is particularly concentrated near the first joint. The compression ring 14
It has a joint 17 of the compression ring 14 housed in a space defined between the outer surface of the compression ring 14 and the stator frame 5. The joining portion 17 is formed at a position circumferentially separated from the position where the stator frame joining plate 2 is provided, and is configured so as not to hinder the mounting of the stator frame joining plate 2, and is provided with a bolt. The compression ring 14 is tightened by a fastening member such as a nut and a nut so that a required compression force can be applied to the stator core 1.

As described above, the compression ring 14 is wound around the outer periphery of the stator core 1 and tightened,
An external pressure is applied to the stator core 1 by a block 15 attached to the compression ring 14 to eliminate a gap at the joint between the cores, thereby preventing the occurrence of magnetic vibration.

FIG. 5 is a sectional side view of a stator core 1 of a stator according to a third embodiment of the present invention, taken along a joint face.
FIG. 5 shows a stator core 1, a stator frame joining plate 2, and a layer filled with an epoxy-based insulating filler 18 provided in a gap formed by the ends of the divided stator core 1. It is shown.

FIG. 6 is a schematic sectional view of the joint of the stator core 1 of FIG. As shown in FIG.
The stator core 1 is formed such that the ends of the divided stator cores 1 are circumferentially adjacent to each other to form a joint face. At the end of the stator core 1 forming this core mating face,
A plurality of concavo-convex portions 19 that are spaced apart in the radial direction are formed,
The concavo-convex portions 19 face each other when adjacent ends face each other, and define a cavity for accommodating the filler.

In the third embodiment of the present invention, the magnetic vibration is prevented by filling the core mating face with an organic filler. Organic fillers used for this purpose include:
It is preferable to use a thermosetting resin from the viewpoint of having sufficient durability at the temperature generated by the operation of the rotating electric machine and stabilizing, and as a particularly preferable thermosetting resin,
Epoxy resins can be mentioned. When filling the joint surface with the epoxy-based insulating filler 18, first, before the split stator integral assembly, the epoxy-based green filler 18 is applied to the iron core joint surface of the stator core 1 and then divided and fixed. Assemble the child together. By doing so, it is possible to reduce the possibility that a gap is formed in the joint surface as compared with the conventional method of inserting a liner into the joint surface. The epoxy-based insulating filler 18 is filled in the laminated uneven portion 19 of the joint surface of the iron core, and is hardened firmly to form a thick resin layer. Therefore, a displacement of the joint surface caused by repeated thermal expansion of the iron core is caused. By reducing the occurrence of cracks at the joint faces such as cohesive failure and interface isolation due to shear stress, the occurrence of iron core joint gaps can be prevented, and as a result, magnetic vibration can be further prevented.

FIG. 7 is a sectional side view of a fourth embodiment of the present invention. As shown in FIG. 7, the stator of the rotating electric machine according to the present invention includes a stator core 1, a stator frame 5, and a stator thermal elongation force direction changing device 20. The stator thermal expansion force direction conversion device 20 is used as a thermal expansion direction conversion member, and rotates in opposite directions about pins 21a and 21b, and is separated from the cams 22a and 2 in the axial direction of the rotor.
2b and a radially outer end formed on the stator frame 5
The stays 23a and 23b adjacent to the stays 2a and 22b and the cam 22a has a radially outer end on the side that is inserted into the jack openings 26a and 26b of the stator frame 5 and faces the stays 23a and 23b across the pins 21a and 21b. , 22b adjacent to the jack blocks 24a, 24
b. The jacks 25a and 25b are connected to each other. The radially inner surfaces of the jack blocks 24a and 24b abut against the stator core 1 and the jack 2
The force applied by 5a, 25b is transmitted to the stator core 1 through jack blocks 24a, 24b. The cams 22a and 22b are rotatably accommodated in the support member 27, respectively. This support member 27 is supported by a foundation. The thermal expansion force direction changing device 20 includes a cam 22a, a jack 25a,
The jack block 24a constitutes a first element independent of the stator frame 5. The first element is configured such that stays 23a formed on the stator frame 5 are arranged outside the rotor in the axial direction, jacks 25a are arranged inside the rotor in the axial direction, and the radial directions of the stays 23a and the jacks 25a are different. A cam 22a is provided between the outer ends. The second element of the thermal elongation direction changing device 20 has the same configuration as the above-described first element, and the first element and the second element are spaced apart from each other in the rotor axial direction. Has been established.

The operation of the thermal expansion force direction changing device 20 will be described.
0 is transmitted to one end of the cams 22a and 22b.
2a and 22b correspondingly pivot in opposite directions about pins 21a and 21b, respectively.
The jacks 25a, 25b disposed on the sides facing each other with the centers a, 21b are moved in the direction opposite to the direction of thermal expansion of the stator frame 5 to reverse the direction of the thermal expansion force. The jacks 25a, 25b apply external pressure to the stator core 1 via the jack blocks 24a, 24b with the force converted in the opposite direction. When an external pressure is applied to the stator core 1 from the outer periphery, the gap at the joint position of the stator core is reduced, so that the magnetic vibration can be reduced. Furthermore, wedges driven between the stator core outer peripheral surface and the stator frame shelves as countermeasures against magnetic vibration apply external pressure to the stator core continuously during operation. can do.

FIG. 8 is a sectional side view showing a fifth embodiment of the present invention. This fifth embodiment is a modification of the above-described fourth embodiment. Conversion device main bodies 20a, 20b
Are cams 28a, 28b and reaction force receiving bases 29a, 29b.
These are configured independently of the stator frame 5. The thermal expansion force of the stator frame 5 during operation is
When the cams 28a and 28b are transmitted to the stator core 1a, the cams 28a and 28b slide by the reaction force receiving bases 29a and 29b, slide, and the forces converted in the opposite directions by the jacks 25a and 25b are transferred. Blocks for jacks 24a, 24b
External pressure is applied via. The effect obtained by applying an external pressure to the stator core 1 from the outer periphery is the same as that of the fourth embodiment, but the cams 28a and 28b are not supported by the pins, and are directly supported by the reaction force receiving bases 29a and 29b. Since it is held, the conversion mechanism can be simplified, and the effect at the time of thermal expansion force conversion can be improved.

FIG. 9 is a sectional top view of a stator of a rotary electric machine according to a sixth embodiment of the present invention. As shown in FIG.
In this embodiment, the stator core ribs 30 formed separately from the stator core 1 are used to apply an external force to the joint surface of the divided stator cores 1. The key bar 31 and the key bar 3 are provided on the stator core rib 30.
1 and a jack bolt 34 for pressing the key 32 against the iron core 1.

FIG. 10 is an enlarged view of the "C" portion shown in FIG. The stator core ribs 30 are formed by firmly welding and fixing a key bar 31 to a stator frame shelf 33. From the radial inside of this key bar 31, the key 3
2 are fitted, and the jack bolt 34
Is screwed.

FIG. 11 shows a key 32, a key bar 31,
FIG. 4 is an exploded perspective view showing a stator frame shelf board 33. As shown in FIG. 11, the key bar 31 extends in the rotor axial direction,
An accommodation groove 35 in which the key 32 is fitted is formed to be shallower than the radial thickness of the key bar 31. The key bar 31 communicates from the radial outside of the key bar 31 to the radially inward end face 36 of the accommodation groove 35, and
Is provided with a through hole 37 having a diameter smaller than the circumferential width of the hole. A female screw is provided in the through hole 37 so that the jack bolt 34 is screwed from the outside in the radial direction.

The key 32 has a radially outer end face 32a and a radially inner end face 32b opposed thereto. The length of the radially outer end face 32a is equal to the radially inner end face 3a.
2b is shorter than the length. A screw for attaching a key attaching bolt 38 is formed on a radially outer end surface 32 a of the key 32.

The key 32 is fixed to the key bar 31 in the following manner. First, the key 32 is fitted into the accommodation groove 35 provided in the key bar 31 from the radial inside. A jack bolt 34 is screwed into the key 32 from the outside in the radial direction, and by screwing in this manner, the radial position of the key 32 is adjusted so that a predetermined external pressure is applied to the stator core 1. With the external pressure applied to the stator core 1 in this manner, the key 32 is tightened with the key mounting bolt 38 and fixed to the key bar 31. Since external pressure is applied from the outer periphery of the iron core by the jack bolts 34, the gap between the stator iron core joints is reduced, and magnetic vibration can be prevented or reduced.

FIG. 12 is a side view of a seventh embodiment of the present invention. In the embodiment of FIG. 12, the height of the air duct at the end of the stator coil 39 incorporated in the stator core 1 is made higher than the other air ducts. This portion is the “D” portion in FIG. FIG. 13 is an enlarged view of a “D” part in FIG. As shown in FIG. 13, the inner spacing piece 41 is spot-welded to the stator core blank so that the dimension of the air duct height 40 of the stator core 1 is higher than other dimensions of the air duct. Using the stator core 1 in which the pieces 41 are laminated together with the stator core punched plate, an air duct space of a coil end portion having a height dimension higher than the others is formed.

FIG. 14 shows that the vibration sensor 42 is attached to the stator coil 39 in the air duct space having the height dimension thus formed in the stator core 1 and connected to the measuring instrument 43 by a lead wire. Is shown. With this sensor 43, it is possible to investigate the vibration behavior of the stator coil 39 affected by the magnetic vibration of the stator core 1 generated during operation. By doing so, the stator coil 3
9 can be easily determined, and effective treatment can be performed as needed, so that damage to the stator coil can be prevented.

[0034]

According to the present invention, magnetic vibration can be prevented or reduced by eliminating or reducing the gap between the divided stator core joints. Further, by setting the air duct size of the stator core at the stator coil end portion higher than the others, the stator coil can be attached to the space through a vibration sensor. With this configuration, the vibration behavior of the stator coil, which may be affected by the magnetic vibration during operation, can be grasped at any time, and the determination data of the soundness of the stator coil can be obtained, so that a reliable measure can be implemented, The child coil can be prevented from being damaged. Therefore, the present invention can provide a highly reliable stator for a rotating electric machine.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing a configuration of a stator equipped with an anti-vibration stay connected to a spring plate.

FIG. 2 is a cross-sectional top view taken along the line AA of FIG.

FIG. 3 is a cross-sectional side view showing a configuration of a stator in which a compression ring is mounted on an outer periphery of a stator core.

FIG. 4 is a cross-sectional top view taken along line BB of FIG. 3;

FIG. 5 is a cross-sectional side view showing a configuration of a stator in which an epoxy-based insulating filler is applied to a stator core division surface.

FIG. 6 is a schematic cross-sectional view of the stator core mating face of FIG. 5;

FIG. 7 is a cross-sectional side view showing a configuration of a stator equipped with a stator frame thermal extension force direction changing device.

8 is a cross-sectional side view showing a modification of the stator frame thermal extension force direction changing device shown in FIG. 7;

FIG. 9 is a cross-sectional top view showing a configuration of a stator in which jack bolts are mounted on ribs for a stator core.

FIG. 10 is an enlarged view of “C” part in FIG. 9;

FIG. 11 is an exploded perspective view showing a key, a key bar, and a stator frame shelf board.

FIG. 12 is a view showing a configuration of a stator in which a height of an air duct of a stator coil end of a stator core is higher than other air duct dimensions.

FIG. 13 is an enlarged view of “D” part in FIG. 12;

FIG. 14 is a diagram showing a vibration sensor, a stator, and a measuring instrument.

FIG. 15 is a diagram showing a conventional magnetic vibration preventing method.

FIG. 16 is a diagram showing a normal state (a), a damaged state (b), and an enlarged part (c) of a damaged part of an insulating liner pushed into a stator core joint.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator iron core 2 ... Stator frame joining plate 3 ... Vibration-proof stay 4 ... Spring plate 5 ... Stator frame 6 ... 1st support body 7 ... 2nd support body 8 ... Rib 9 ... Clamp member 10 ... Member DESCRIPTION OF SYMBOLS 11 ... Holding member 14 ... Compression ring 15 ... Block 16 ... Compression ring groove 17 ... Joining part 18 ... Epoxy-based green filler 19 ... Laminate unevenness 20, 20a, 20b ... Stator heat expansion method converter 21a, 21b ... Pins 22a, 22b ... Cams 23a, 23b ... Stays 24a, 24b ... Jack blocks 25a, 25b ... Jacks 26a, 26b ... Jack openings 27 ... Support members 28a, 28b ... Cams 29a, 29b ... Reaction force receiving tables 30 ... Rib for stator core 31 Key bar 32 Key 32a Radially outer end face 32b Radial inner end face 33 Stator frame shelf 34 Jack bolt 35 Housing Groove 36 ... Radially inward end face 37 ... Through hole 38 ... Key mounting bolt 39 ... Stator coil 40 ... Air duct height 41 ... Inner spacing piece 42 ... Vibration sensor 43 ... Measuring instrument 44 ... Wedge 45 ... Insulating liner

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H002 AA00 AA04 AC03 AC06 5H605 AA00 AA04 BB02 BB14 CC01 CC03 CC10 DD03 DD38 EA02 EA11 GG04 GG06

Claims (9)

[Claims] 1. A stator core divided in a circumferential direction, a stator frame radially separated from an outer peripheral surface of the stator core, and a stator core disposed between the stator core and the stator frame. A stator for a rotating electrical machine, comprising: a stator frame joining plate provided with a vibration isolating stay connected to a spring plate radially outside the stator frame joining plate. . 2. An anti-vibration stay fixed between a first support provided on the stator frame joining plate and a second support spaced radially outward from the first support. The stator according to claim 1, wherein the second support is attached to the spring plate via an attachment member. 3. A stator core divided in a circumferential direction, a stator frame spaced radially outward from an outer peripheral surface of the stator core, and a stator core disposed between the stator core and the stator frame. A stator for a rotating electrical machine, comprising: a stator frame joining plate provided with a compression ring mounted radially outside the stator core. 4. In a stator of a rotating electrical machine having a stator core divided in a circumferential direction, an epoxy-based insulating filler is disposed in a gap formed by ends of stator cores adjacent to each other. Characteristic stator of rotating electric machine. 5. A rotating electric machine, comprising: a stator core divided in a circumferential direction; and a stator frame radially outwardly spaced from an outer peripheral surface of the stator core. A stator for a rotating electrical machine, comprising: a converter for changing a direction of a thermal expansion force of the stator frame. 6. The conversion device according to claim 5, wherein the conversion device includes a conversion member and a jack disposed between the conversion member and a stator core and extending through an opening of the stator frame. The stator of the rotating electric machine described. 7. The rotating electric machine stator according to claim 5, wherein the conversion device includes a reaction force receiving base. 8. A stator in which a key bar is fixed in a stator of a rotating electric machine including a stator core divided in a circumferential direction and a stator frame radially outwardly spaced from an outer peripheral surface of the stator core. A stator for a rotating electric machine, comprising: a core core rib, a key fitted to the key bar, and a jack bolt for pressing the stator core through the key. 9. A stator for a rotating electric machine in which a stator iron core is formed in a circumferential direction, wherein heights of air ducts at both ends of the stator core are higher than other air ducts.