WO2011098712A1 - Ensemble avec dispositif de commande par cremailleres de la position angulaire d'aubes pivotantes de turbomachine - Google Patents
Ensemble avec dispositif de commande par cremailleres de la position angulaire d'aubes pivotantes de turbomachine Download PDFInfo
- Publication number
- WO2011098712A1 WO2011098712A1 PCT/FR2011/050236 FR2011050236W WO2011098712A1 WO 2011098712 A1 WO2011098712 A1 WO 2011098712A1 FR 2011050236 W FR2011050236 W FR 2011050236W WO 2011098712 A1 WO2011098712 A1 WO 2011098712A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- rack
- guide
- radial
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/002—Propeller-blade pitch changing with individually adjustable blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/46—Arrangements of, or constructional features peculiar to, multiple propellers
- B64C11/48—Units of two or more coaxial propellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/026—Aircraft characterised by the type or position of power plants comprising different types of power plants, e.g. combination of a piston engine and a gas-turbine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05D2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the invention relates to an assembly comprising an actuating ring, a plurality of pivoting vanes distributed azimutally around a first axis, and a control device for controlling the angular position of said pivoting vanes.
- a stage of pivoting vanes in a turbomachine, can be controlled by means of an actuating ring. When it rotates along the axis of the turbomachine relative to the rotor structure which supports the blades, this rotation causes a pivoting of the blades which take a desired angular position.
- a control device of this type is disclosed by the patent application EP1953084.
- the invention is more particularly an assembly equipping a turbomachine whose blades are called to rotate at a high rotational speed (for example, at 1000 rpm or more), and / or to operate at high temperature.
- a device for controlling turbine engine pivoting vanes transmits to the vanes the angular position control by means of bevel gears, arranged inside a polygonal ring supporting the vanes.
- bevel gears arranged inside a polygonal ring supporting the vanes.
- the object of the invention is therefore to provide an assembly comprising an actuating ring, a plurality of pivoting vanes distributed azimuthally about a first axis, and a control device for controlling said plurality of pivoting vanes by means of the actuating ring, each of said vanes having a toothing;
- the blade control device is capable of controlling the angular position of the pivoting vanes reliably, occupies a relatively small volume, in particular upstream of the polygonal ring (or equivalent means) supporting the blades; and finally, is able to operate in a wide range of temperatures, and / or at high rotational speeds.
- said assembly comprises racks mounted on the crown
- each rack is meshed with the toothing of one of the blades to place the latter in a selected angular position
- each rack is held in the radial direction by radial positioning means fixed to the blade;
- each rack is mounted on the ring by means of a plurality of guides spaced along the circumference of the ring, linking the movements of the rack in the circumferential direction to those of the ring, and able to slide on the one hand by relative to the crown, for each guide in the radial direction which is specific to it, and secondly with respect to the rack, in a direction of substantially radial movement specific to the rack.
- the term 'azimuth' means 'in a plane perpendicular to the axis considered', that is to say in the present case, a plane perpendicular to the first axis (which corresponds to the axis of the turbomachine, when the invention is integrated in a turbomachine).
- the pivoting vanes whose angular position is controlled by the control device according to the invention may or may not be distributed angularly in a regular manner around the axis of the turbomachine.
- the invention can be implemented in different ways.
- all the blades arranged azimutally and forming a blade wheel are driven and controlled angularly by the actuating ring.
- the latter in turn is driven by drive crown control means, for example by a jack controlled by an electronic control unit.
- an objective of the invention may notably include allowing the blade to be pivoted, even though the blade interior space is too small to allow the control of all of those by means of bevel gears arranged inside the polygonal ring supporting the blades.
- a portion of the blades are driven by gears or equivalent means located (s) inside the support ring of the blades.
- These blades are called driving blades, insofar as in their turn they drag the rest of the blades, called driven blades.
- the angular position of the blades is controlled angularly by first control means , for example by sprockets located inside the blade support ring, the rest of the vanes, that is to say the blades which are not controlled by the first control means, constitutes the second group of blades, "driven blades".
- the angular position of the driven blades is controlled by the control device of an assembly according to the invention.
- the control device comprises means for coupling between the driving blades and the actuating ring. These coupling means ensure that each change of angular position of the driving blades causes a corresponding rotation of the actuating ring.
- these coupling means may comprise racks identical to those fitted to the blades of the second group of blades, meshing with corresponding teeth of the driving blades. Since all the racks are connected to the driving ring, it follows that the movement in the circumferential direction communicated to the actuating ring is common to all the racks and is therefore transmitted to all the vanes. .
- the actuating ring in this case is a synchronizing ring, which synchronizes the pivoting movements of all the vanes of the impeller.
- a first characteristic of the invention consists in the fact that each pivoting blade is actuated by means of a toothing, which meshes with a corresponding toothing of a rack.
- the racks are mounted on the actuating ring by means of guides.
- the guides are parts or sets of parts that provide a connection between the actuating ring and the rack.
- the guides rotate the crown and the rack in rotation, whereby all rotation of the actuating ring relative to the rotor structure is transmitted to the racks (an extremely small gap remains possible because of the sliding possibilities of the guides relative to the rack).
- the teeth of a blade can be here a toothing formed directly on the blade, or a toothing formed on a piece fixed to the blade.
- the indication that the rack is mounted on the ring may designate a rack mounted on any surface of the ring, whether it is a radially outer surface (this is the preferred solution because the congestion problems are less), a "slice" surface of the rack, whose normal is approximately parallel to the axis of rotation of the turbine engine, or even a radially inner surface to the actuating ring .
- the most interesting feature of the invention lies in the connection mode between the racks and the actuating ring. It has indeed been found during the design of the invention that the rack can not be attached to the actuating ring or be part of it: On the contrary, it is essential to ensure a possibility of relative radial movement between the rack and the crown, to ensure reliable operation of the angular control device of the blades.
- the assemblies according to the invention comprise in particular control devices (in particular in particular on board aircraft) controlling pivoting vanes called to reach speeds of rotation and / or to be subjected to high temperatures.
- these devices are thus subjected on the one hand to centrifugal forces related to the rotation of the rotor of the turbomachine, and / or on the other hand, to significant thermal variations which cause expansions of the various parts involved.
- the reliable operation of the control device requires a very precise meshing of the toothing of the actuating ring with the corresponding toothing of the blade. It is therefore imperative that the teeth have exactly the same pitch. Therefore, an increase in the pitch of the toothing of the actuating ring can not be accepted, when the toothing of the pivoting blade, for its part, keeps a constant pitch.
- the angular displacements of the ring gear with respect to the rotor structure are not transmitted at dawn directly from a toothing of the ring gear, but are transmitted via racks mounted on the crown, mounted in the manner indicated above.
- the mounting mode of the racks on the ring allows that the pitch of the teeth of the racks remains constant, even at high rotational speeds of the rotor or in case of large temperature variations.
- each section individually, naturally undergoes centrifugal forces.
- the centrifugal forces themselves cause almost no elongation of the racks in the circumferential direction.
- connection between the racks and the ring is such that an elongation of the ring in the circumferential direction, resulting from its overall expansion, does not communicate with the racks, and thus no constraint circumferential is transmitted to the racks by the crown via the guides.
- the guides are able to slide relative to the ring, when it undergoes an overall expansion, the guides remain in a fixed position (relative to the blade), regardless of the radial expansion of the crown. Also, this radial expansion (or contraction) of the crown causes no change in the pitch of the teeth of the racks.
- the second reason that makes it necessary for the rack to have a degree of freedom with respect to the actuating ring is the deformation experienced by the rotor structure during rotation. This deformation occurs at the blade pivot points, which move radially under the effect of the traction exerted by the blades and resulting considerable centrifugal forces exerted on them.
- the actuating ring generally having a form of revolution, does not undergo such deformation.
- the difference in radial displacement between the blade pivot and the actuating ring causes a radial displacement between the blade pivot and the crown.
- the respective teeth of the rack and dawn must remain at all times facing each other, especially in the radial direction, to be able to perform their function reliably and sustainably.
- control device of an assembly according to the invention therefore provides that the radial position of the rack is linked to that of the blade pivot.
- the mounting means of the rack on the actuating ring fix five of its six degrees of freedom of movement relative to the ring, only a displacement in a substantially radial direction remaining possible.
- the direction of movement of each rack is parallel to the axis of the blade. This is naturally the dawn whose teeth are meshed with the rack. Indeed, the previously indicated deformation of the rotor structure results from the forces transmitted by the blades. These forces apply to the rotor structure at the location of the blade pivots and in the radial direction at these points. Also, the direction of movement, which is that of the movement that must perform the rack to accompany the deformation of the rotor structure, is preferably parallel to the direction of the axis of the blade associated with the rack.
- At least one of the guides has a ring guide rod slidably engaged in a ring guide passage formed in the ring in a radial direction for the guide.
- a radial direction for the guide here designates a direction radial with respect to the axis of the turbomachine at the location of the guide, for example the radial direction at the center of gravity of the guide.
- the ring guide rod is a profiled bar, which allows particularly simple radial relative movement of the actuating ring relative to the guide, and therefore, relative to the rack, without generating circumferential stress on the rack . It may have a circular section, but also more generally have any section.
- At least one of said guides comprises a section guide rod, slidably engaged in a section guide passage arranged in the direction of movement of the rack in question.
- the section guide rod is a profiled bar, which allows a very simple way to allow the guide to ensure its guide function of the rack, while allowing the movement thereof in the direction of movement.
- the section guide rod may have a circular section, but also more generally have any section.
- a guide may comprise, for example, several parallel bars for guiding the rack.
- a non-zero angle is formed (almost always) between the section and ring guide rods. This angle is the angle formed between the direction of movement (relative to the rack) and the radial direction for the guide. This angle is generally low, for example less than 10 °.
- a guide includes both a ring guide rod and a section guide rod
- the guide is a piece formed by the ring guide rod, the section guide rod. , and a junction portion connecting the ring and stub rods.
- This is usually a single piece, although it can also be an assembly.
- the joining part may in particular be a connecting block, connecting the ring and stub rods.
- the joining portion may comprise in particular an antirotation function of the guide relative to the crown, in particular to maintain the guides in the desired position, even in the absence of the rack.
- the control device comprises rotational locking means arranged on the ring, adapted to prevent rotation of a first guide relative to the ring around a radial direction. These locking means can be integrated in the actuating ring or fixed thereto. These rotational locking means serve to facilitate the mounting of the rack on the actuating ring.
- the first guide has a flat perpendicular to the axis of the turbomachine, and the ring has a flat surface arranged near said flat so as to prevent rotation of the guide around a radial direction .
- the locking in rotation can be achieved by using lateral surfaces of the joining part. arranged so as to be perpendicular to the direction of the axis of the turbomachine.
- control device comprises at least one guide bearing, such as a ball cage, disposed in one of said passages for sliding in said passage of the rod extending in said passage.
- a guide bearing is used in particular to minimize the friction forces transmitted between the actuating ring and the rack, which is desirable to allow optimal positioning of the racks relative to the ring, and thus improve the operation of the device. ordered.
- control device further comprises a damping system in radial abutment of said bearing.
- the radial positioning means comprise, for each blade, an arcuate rib, of radial axis, arranged in a device for attaching and pivoting the blade, and engaged in a groove of the rack meshed with the blade to impose on said rack a radial position (that is to say, so tiny that the rib imposes a radial position to the rack geared with dawn).
- the attachment and pivot device of the blade is the part or the assembly of parts located at the end of the blade located on the side of the blade pivot and ensuring the connection between the profiled portion of the blade and the rotor structure.
- the rib secured to the base of the blade has an arcuate shape, with the same axis as the pivot axis of the blade, which allows its interaction with the rack is not changed, whatever the angular position adopted by dawn.
- the rib transmits a force to the rack in the radial direction, which imposes on the rack a radial position.
- the invention also relates to a turbomachine comprising an assembly comprising an actuating ring, a plurality of pivoting vanes distributed azimutally about an axis of the turbomachine, and a control device for controlling the angular position of said pivoting vanes; each of said vanes having a toothing; turbomachine whose control device is able to operate, even if said blades undergo significant thermal variations and / or are driven at a high rotational speed.
- the assembly that comprises the turbomachine is an assembly as defined above.
- the invention can be implemented in a turbomachine in which the blades controlled by the control device are blades whose radially outer end is free.
- the invention therefore particularly relates to turboprop engines.
- FIG. 1 is a schematic overview of a turbomachine according to the invention.
- FIG. 2 is a partial schematic view of the control device of an assembly according to the invention.
- FIG. 3 is an exploded partial perspective view of the control device of FIG. 2;
- - Figures 4, 5 and 6 are sections along the axis of rotation of the control device of Figure 2, respectively in operation at moderate speed, high speed and stopped;
- FIG. 7 is a partial schematic perspective view of the actuator ring of the control device of Figure 2, with two guides;
- FIG. 8 is a partial diagrammatic perspective view of the control device of FIG. 2.
- the turbomachine 10 shown in FIG. 1 comprises a nacelle 12, as well as two rotors 20 and 22 designed to rotate about an axis of rotation A of the turbomachine 10.
- Each of these rotors 20 and 22 has a plurality of pivoting vanes 30, respectively fixed on structures or housings 31 and 33 of the rotors 20 and 22.
- the vanes 30 are thus arranged in two rows of vanes, placed one behind the other in the direction of movement of the rotor, and provided to rotate in opposite directions, contrarotatively.
- Each of the pivoting vanes 30 is a blade which extends radially with respect to the axis A of rotation of the turbomachine 10, said axis of the turbomachine.
- the radially outer ends of each blade 30 are free.
- Each of these blades 30 can pivot about its axis in order to modify its interaction with the flow of air passing around the turbomachine 10 in the general direction of the axis A.
- the blades 30 are all identical, and are arranged at angular positions regularly distributed on the periphery of the rotor.
- the turbomachine 10 comprises a control device for controlling the angular position or the orientation of the blades 30.
- This control device comprises an actuating ring 40 arranged in the rotor (FIG. 2).
- This actuating ring 40 is controlled by control and actuation means, not shown, in a known manner.
- the crown 40 can move in rotation about the axis A to transmit angular position (or orientation) control to the blades 30.
- the actuating ring 40 has a generally annular shape and is arranged so that its axis coincides with the axis A of the rotor.
- On the outer surface 42 of the actuating ring are mounted a set of racks 50, one rack 50 opposite each blade 30 whose angular position must be controlled. These racks 50 serve to transmit the rotation control of the actuating ring to the blades 30.
- Each vane 30 is fixed to the rotor structure by a vane attachment and pivoting device 32.
- Each vane attachment and pivoting device 32 is fixed to the rotor structure 31 by at least one bearing. shown, which allows the dawn to rotate around its axis B.
- Each blade attachment and pivoting device 32 comprises an orientation plate 35, having substantially the shape of a disk B axis, a portion of the periphery is occupied by a toothing 34.
- This plate 35 comprises a slot provided to receive and fix the foot of the blade 30, by cooperation of form.
- the toothing 34 is positioned on the periphery of the plate 35 so that in the average angular position of the blade, the point of contact provided between the plate 35 and the rack 50 is directed towards the front of the turbomachine, following the axis A of this one.
- each rack 50 has substantially the shape of a portion of ring or arc of circle, having as axis the axis A of the turbomachine.
- Each rack 50 has a toothing 52 which extends over a surface of the rack directed towards the rear of the turbomachine.
- the respective teeth 34 and 52 of the blade attachment and pivoting device 32 and the rack 50 face each other and are arranged to mesh together like conical gears.
- a rotation about the axis A of the actuating ring 40 causes a rotation about their radial axes B of the vanes 30.
- the racks 50 are mounted on the actuating ring so as to leave free one degree of freedom of the racks relative to the actuating ring, (the other 5 degrees of freedom being thus blocked).
- FIG. 3 is an exploded view on which appear different elements of the control device. We can thus distinguish:
- Each of the guides 62A and 62B includes a section guide rod (64A, 64B) and a ring guide rod (66A, 66B); each section guide rod being attached to the ring guide rod by means of a paver-shaped joining portion (68A, 68B).
- the section guide rods 64A, 64B have a straight rod shape, and extend in a radial direction B.
- This radial direction B is the radial direction at the midpoint of the rack 50 and is the radial direction at the pivot point from dawn 30.
- the rack 50 has two section guide passages
- section guide rods 64A, 64B which cross the rack from side to side in the direction B, to allow the passage of section guide rods 64A, 64B.
- These passages 54A, 54B are located near the two ends 56A, 56B of the rack 50 in the circumferential direction.
- the rack 50 is arranged to allow the section guide rods 64A, 64B to slide easily within the passages 54A, 54B.
- the passages 54A, 54B are equipped with section guide bearings 55A, 55B, made in the form of cylindrical sleeves of low friction material ( ⁇ 0.15), or coated with such a material.
- the section guide rods 64A, 64B in association with the passages 54A, 54B allow relative movement of the rack 50 with respect to the actuating ring 40 in the direction B, which is substantially radial and common for all guides (both guides 62A, and 62B).
- the direction B is the radial direction at the pivot point of the blade 30.
- the guides 62A, 62B each comprise a ring guiding rod 66A, 66B. These rods are in the form of straight bars arranged in radial passages 44A, 44B (ring guide passages) formed in the ring 40. Each of these radial passages 44A, 44B extends in the radial direction at the point where it turns out that.
- the radial passages 44A, 44B are arranged to allow the ring guide rods 66A, 66B to slide relative to the actuating ring in their respective radial directions.
- ring guide bearings 46A, 46B are disposed within the radial passages 44A, 44B. In the embodiment shown, these bearings are simply cylindrical sleeves made of material with a low coefficient of friction ( ⁇ 0.15), or coated with such a material.
- these bearings comprise an enlarged flange, arranged at the inner radial end of the passages 44A, 44B.
- This collar has a diameter too large to allow it to pass through these passages, which prevents any outward movement of the bearings 46A, 46B during the rotation of the rotor, under the effect of centrifugal forces.
- the ring guide bearings may be in the form of a ball cage.
- damping systems of the radial abutment can be provided on ring and / or section guide bearings.
- section guide bearings 55 A, 55 B or ring 46A, 46 B may be locked in rotation to prevent them from rotating about their axis.
- Such locking can be obtained by providing a flat on the circumference of the bearing, locking in a corresponding flat portion arranged in the passage housing the bearing.
- the flat may also be provided at the collars mentioned above.
- Figures 4 and 5 show by comparison a relative movement between the rack 50 and the guides 62A and 62B.
- the rotor rotates at moderate speed.
- the rotor rotates at full speed.
- the centrifugal forces cause a strong radial outward movement of the blade pivot and consequently of the rack which is connected thereto (by means which will be presented later).
- the actuating ring 40 deforms little with respect to the rotor structure under the effect of centrifugal forces. A relative displacement in the radial direction therefore takes place between the blade and the blade pivot, linked to the rack, on the one hand, and the actuating ring, on the other hand.
- FIGS. 4 and 6 also show by comparison a relative displacement between the rack 50 and the guides 62A and 62B, in another case of biasing the rotor 20.
- the rotor rotates at moderate speed.
- the actuating ring 40 retracts radially relative to the position it takes (or the volume it occupies) when it is rotating, since it no longer undergoes centrifugal forces.
- the actuating ring 40 is thus shown lower in FIG. 6 than in FIG. 4, with respect to the guides 62A and 62B.
- the relative positions of the rack 50 with respect to the guides 62A and 62B have not changed.
- Figure 7 shows the shape of the connecting portion 68A, 68B of the guides 62A, 62B.
- the ring guide rods 64A, 64B make an angle with the section guide rods 66A, 66B. This angle is the angle formed between the radial direction for the guides and the radial direction at the blade pivot point (direction B).
- the joining portion 68A, 68B has substantially a rectangular parallelepiped shape. It has in particular two parallel flat surfaces, said front and rear surfaces 67A, 67B and 69A, 69B for the connecting portions 68A and 68B respectively, whose normals are respectively directed towards the front and towards the rear of the turbomachine.
- a groove 45 On the radially outer surface 42 of the crown ring 40 is formed a groove 45.
- This groove 45 has two lateral surfaces 47 and 49 respectively directed towards the rear and towards the front of the turbomachine.
- the width of the groove 45 is approximately equal (very slightly greater) than the distance between the front and rear surfaces 67A, 67B and 69A, 69B of the joining portions 68A, 68B. Also, when the guides 62A, 62B are mounted on the rim, the joining portion 68A, 68B is locked in rotation between the side surfaces 47 and 49 of the groove 45.
- FIG. 8 shows the radial positioning means provided for the racks 50.
- the right part of FIG. 8 notably has the blade attachment and pivoting device 32 and the toothing 34 formed on the orientation plate 35.
- the radial positioning means comprise mainly a rib 70 arcuate, radial axis B, arranged on a fixed flange fixed and integrated in the device 32 for attaching and pivoting the blade.
- the rib 70 is engaged in a groove 72 of the rack 50 meshing with the blade 30. Due to the engagement of the rib 70 in the groove 72, the movements in the radial direction of the blade root 32 are transmitted to the rack 50. In this way, the rib 70 imposes on the rack 50 a radial position, that is to say a position along the axis B of the blade, regardless of the radial position of the actuating ring 40.
- the radial displacements of the rack 50 with respect to the actuating ring simply cause the section guide rods 64A, 64B to slide in the section guide passages 54A, 54B independently of the connected displacements of the crown and the rack. in the circumferential direction.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Turbines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/578,765 US9068574B2 (en) | 2010-02-12 | 2011-02-07 | Assembly having a control device with racks for controlling the angular position of pivotally-mounted blades in a turbine engine |
| GB1213488.8A GB2489878B (en) | 2010-02-12 | 2011-02-07 | An assembly having a control device with racks for controlling the angular position of pivotally-mounted blades in a turbine engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1000582A FR2956377B1 (fr) | 2010-02-12 | 2010-02-12 | Dispositif de commande par cremalleres de la position angulaire d'aubes pivotantes de turbomachine |
| FR1000582 | 2010-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011098712A1 true WO2011098712A1 (fr) | 2011-08-18 |
Family
ID=42732687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2011/050236 Ceased WO2011098712A1 (fr) | 2010-02-12 | 2011-02-07 | Ensemble avec dispositif de commande par cremailleres de la position angulaire d'aubes pivotantes de turbomachine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9068574B2 (fr) |
| FR (1) | FR2956377B1 (fr) |
| GB (1) | GB2489878B (fr) |
| WO (1) | WO2011098712A1 (fr) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493964A (zh) * | 2011-12-29 | 2012-06-13 | 鞍山风机集团有限责任公司 | 一种轴流通风机动叶调节装置 |
| CN104929858A (zh) * | 2015-05-16 | 2015-09-23 | 张效新 | 一种直齿条式风轮叶片调节机构 |
| CN105351146A (zh) * | 2015-11-23 | 2016-02-24 | 清新张家口能源科技有限公司 | 一种风机叶片角度连杆式复合调节机构 |
| FR3031958A1 (fr) * | 2015-01-23 | 2016-07-29 | Franck Andre-Marie Guigan | Helice a geometrie variable |
| CN109484598A (zh) * | 2018-10-22 | 2019-03-19 | 哈尔滨工程大学 | 一种可调螺距式水空两用推进器 |
| CN109769788A (zh) * | 2019-01-02 | 2019-05-21 | 北京农业智能装备技术研究中心 | 雾化器、雾化系统及雾化施药的方法 |
| CN109819955A (zh) * | 2019-01-02 | 2019-05-31 | 北京农业智能装备技术研究中心 | 桨叶组件及航空雾化系统 |
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| CA2891864A1 (fr) * | 2014-05-30 | 2015-11-30 | Daniel Alan NIERGARTH | Rotor a pas variable dote de contrepoids eloignes |
| US9869190B2 (en) | 2014-05-30 | 2018-01-16 | General Electric Company | Variable-pitch rotor with remote counterweights |
| US10072510B2 (en) | 2014-11-21 | 2018-09-11 | General Electric Company | Variable pitch fan for gas turbine engine and method of assembling the same |
| CN104632702B (zh) * | 2014-12-30 | 2017-04-05 | 东方电气集团东方汽轮机有限公司 | 轴流压气机进气导叶的同步传动机构 |
| FR3036141B1 (fr) * | 2015-05-12 | 2019-08-09 | Safran Aircraft Engines | Arbre de commande radial pour dispositif de commande de l'orientation des pales de soufflante d'une turbomachine a soufflante non carenee et procede de montage d'un tel arbre. |
| US10100653B2 (en) | 2015-10-08 | 2018-10-16 | General Electric Company | Variable pitch fan blade retention system |
| US10107130B2 (en) * | 2016-03-24 | 2018-10-23 | United Technologies Corporation | Concentric shafts for remote independent variable vane actuation |
| US11674435B2 (en) | 2021-06-29 | 2023-06-13 | General Electric Company | Levered counterweight feathering system |
| US11795964B2 (en) | 2021-07-16 | 2023-10-24 | General Electric Company | Levered counterweight feathering system |
| IT202200022992A1 (it) * | 2022-11-08 | 2024-05-08 | Ge Avio Srl | Elica a passo variabile di un motore a turbina a gas |
| US12497908B2 (en) | 2024-03-13 | 2025-12-16 | General Electric Company | Turbine engine including a fan assembly having a damper |
| US12460549B1 (en) | 2025-05-30 | 2025-11-04 | General Electric Company | Pitch-controlled blade retention collar |
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| US3876334A (en) * | 1974-04-08 | 1975-04-08 | United Aircraft Corp | Variable pitch rate means |
| US3893789A (en) * | 1973-02-21 | 1975-07-08 | United Aircraft Corp | Pitch change actuator for a variable pitch fan propulsor |
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| US4968217A (en) * | 1989-09-06 | 1990-11-06 | Rolls-Royce Plc | Variable pitch arrangement for a gas turbine engine |
| US5174716A (en) * | 1990-07-23 | 1992-12-29 | General Electric Company | Pitch change mechanism |
| EP1953084A1 (fr) | 2007-01-26 | 2008-08-06 | Snecma | Turbopropulseur à hélice à pas réglable |
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| US3422625A (en) * | 1966-08-05 | 1969-01-21 | Garrett Corp | Jet engine with an axial flow supersonic compressor |
| US5152668A (en) * | 1990-07-23 | 1992-10-06 | General Electric Company | Pitch change mechanism for prop fans |
| US5282719A (en) * | 1991-05-13 | 1994-02-01 | Alliedsignal Inc. | Quad mode fan pitch actuation system for a gas turbine engine |
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- 2011-02-07 GB GB1213488.8A patent/GB2489878B/en active Active
- 2011-02-07 US US13/578,765 patent/US9068574B2/en active Active
- 2011-02-07 WO PCT/FR2011/050236 patent/WO2011098712A1/fr not_active Ceased
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|---|---|---|---|---|
| US3893789A (en) * | 1973-02-21 | 1975-07-08 | United Aircraft Corp | Pitch change actuator for a variable pitch fan propulsor |
| US3876334A (en) * | 1974-04-08 | 1975-04-08 | United Aircraft Corp | Variable pitch rate means |
| US4657484A (en) * | 1984-09-04 | 1987-04-14 | General Electric Company | Blade pitch varying means |
| US4968217A (en) * | 1989-09-06 | 1990-11-06 | Rolls-Royce Plc | Variable pitch arrangement for a gas turbine engine |
| US5174716A (en) * | 1990-07-23 | 1992-12-29 | General Electric Company | Pitch change mechanism |
| EP1953084A1 (fr) | 2007-01-26 | 2008-08-06 | Snecma | Turbopropulseur à hélice à pas réglable |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493964A (zh) * | 2011-12-29 | 2012-06-13 | 鞍山风机集团有限责任公司 | 一种轴流通风机动叶调节装置 |
| FR3031958A1 (fr) * | 2015-01-23 | 2016-07-29 | Franck Andre-Marie Guigan | Helice a geometrie variable |
| CN104929858A (zh) * | 2015-05-16 | 2015-09-23 | 张效新 | 一种直齿条式风轮叶片调节机构 |
| CN104929858B (zh) * | 2015-05-16 | 2017-09-15 | 张效新 | 一种直齿条式风轮叶片调节机构 |
| CN105351146A (zh) * | 2015-11-23 | 2016-02-24 | 清新张家口能源科技有限公司 | 一种风机叶片角度连杆式复合调节机构 |
| CN109484598A (zh) * | 2018-10-22 | 2019-03-19 | 哈尔滨工程大学 | 一种可调螺距式水空两用推进器 |
| CN109769788A (zh) * | 2019-01-02 | 2019-05-21 | 北京农业智能装备技术研究中心 | 雾化器、雾化系统及雾化施药的方法 |
| CN109819955A (zh) * | 2019-01-02 | 2019-05-31 | 北京农业智能装备技术研究中心 | 桨叶组件及航空雾化系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2489878A (en) | 2012-10-10 |
| US9068574B2 (en) | 2015-06-30 |
| US20130011261A1 (en) | 2013-01-10 |
| GB2489878B (en) | 2016-06-22 |
| FR2956377B1 (fr) | 2012-09-14 |
| GB201213488D0 (en) | 2012-09-12 |
| FR2956377A1 (fr) | 2011-08-19 |
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