EP1696134B1 - Regulation device for centering the unison ring for the variable stator vanes of a turbomachine. - Google Patents

Regulation device for centering the unison ring for the variable stator vanes of a turbomachine. Download PDF

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Publication number
EP1696134B1
EP1696134B1 EP06110207.5A EP06110207A EP1696134B1 EP 1696134 B1 EP1696134 B1 EP 1696134B1 EP 06110207 A EP06110207 A EP 06110207A EP 1696134 B1 EP1696134 B1 EP 1696134B1
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EP
European Patent Office
Prior art keywords
pad
control ring
ring
compressor according
tubular portion
Prior art date
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Application number
EP06110207.5A
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German (de)
French (fr)
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EP1696134A2 (en
EP1696134A3 (en
Inventor
Alain Bromann
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Safran Aircraft Engines SAS
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SNECMA SAS
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Publication of EP1696134A2 publication Critical patent/EP1696134A2/en
Publication of EP1696134A3 publication Critical patent/EP1696134A3/en
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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/644—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins for adjusting the position or the alignment, e.g. wedges or eccenters

Definitions

  • the present invention relates to the general field of devices for adjusting the centering of a synchronization ring controlling turbomachine pivoting vanes on the axis thereof.
  • stator vane stages In a turbomachine, it is known to use one or more stages of stator vanes for adjusting the flow and the flow direction of the gases passing through the compression section as a function of the operating speed of the turbomachine.
  • stator vane stages comprise a plurality of blades (called variable pitch vanes) which are pivotable about their stator connection axis so that their stall angle can be varied according to the operating speed of the stator. the turbomachine.
  • Known devices for controlling the variable pitch vanes usually comprise a control member in the form of a ring surrounding a casing of the turbomachine and a plurality of levers or links, each link having a first end connected to the control ring by a hinge and a second end mounted on the pivot of a respective blade.
  • the synchronized modification of the angular position of the blades is thus achieved by rotation of the ring around the axis of the turbomachine.
  • each pad is secured to a shoe holder with a rod which passes through the ring from one side and which is screwed into the ring from below it. Also, due to the presence of the casing shell, it is no longer possible to disassemble a pad from below the ring.
  • EP 0,375,593 , EP 0.741.247 , FR 2,617,544 and EP 1,403,467 disclose centering adjustment devices of the control ring according to the preamble of claim 1.
  • the main object of the present invention is thus to overcome such disadvantages by proposing a device for adjusting the centering of the ring that is simple, reliable and which saves time during assembly and disassembly.
  • a turbomachine compressor according to claim 1 is provided.
  • Fixing under the control ring means a fixing of the shoe holder against an inner surface of the ring.
  • assembly from above the control ring is meant an assembly of fastening systems from the outside of the ring.
  • the device comprises means for adjusting the radial position of the pads.
  • the shoe holder has a substantially tubular portion which extends longitudinally from an inner surface of the control ring towards the inside thereof and which is adapted to receive a complementary tubular portion of the shoe, the device comprising in addition, a screw intended to be screwed into the tubular portion of the pad so as to allow adjustment of the radial position of the pad.
  • the device may also comprise means for locking the pad in rotation in the shoe-holder.
  • the device may also comprise means for locking the screw in the pad.
  • a spring is interposed between the tubular portion of the shoe-holder and the tubular portion of the shoe so as to ensure damping of the shoe on the circular surface.
  • Each shoe-holder may be disposed in the radial extension of the dovetail pin with which it is associated.
  • each shoe holder can be advantageously fixed on the control ring by means of two attachment systems which are arranged symmetrically on either side of the blade of the blade with which it is associated.
  • each shoe-holder may be angularly offset relative to the pin of the blade with which it is associated.
  • the fastening systems each consist of a screw to be screwed into the control ring from above and a clamping nut.
  • the figure 1 partially represents a turbomachine compressor of axis XX.
  • the compressor comprises an annular stator envelope 10 which is centered on the axis XX of the turbomachine and which surrounds an annular rotor 12 so as to define an annular stream 14 of gas flow.
  • the compressor further comprises a plurality of blades which form several stages in the flow channel 14, some of which are formed of variable-pitch vanes 16. These variable-pitch vanes 16 are pivotable about an axis 18 which passes through the stator casing 10.
  • Each axis (or pivot) 18 of the variable-pitch vanes 16 is connected to one end of a rod or control lever 20 via a nozzle 22.
  • the other end of the rods 20 is articulated around pins 24 arranged radially on a control ring 26 which surrounds a circular surface 28 centered on the axis XX of the turbomachine and to which it must be coaxial.
  • the invention relates to a device for adjusting the centering of the control ring 26 relative to the axis XX of the turbomachine. More specifically, such a device must be able to maintain a fixed radial spacing between the control ring 26 and the circular surface 28 which is centered on the axis XX.
  • the device for adjusting the centering of the control ring 26 comprises in particular a plurality of pads 30 intended to come into contact with the circular surface 28.
  • Each shoe 30 is integral with a shoe holder 32.
  • the shoe holder 32 has a substantially tubular portion 34 which extends longitudinally from an inner surface 26a of the control ring 26 inwardly thereof.
  • the shoe 30 is for example crimped at the free end of the tubular portion 34.
  • tubular portion 34 of the shoe holder 32 ends with two fastening flanges 36 which come into contact with the inner surface 26a of the ring 26.
  • fastening systems 38 allow to fix the shoe holder 32 under the control ring 26.
  • two screws 38a thus traverse the ring 26 radially and clamping nuts 38b are screwed at their free end against the fastening flanges 36 of the shoe holder 32.
  • the screws 38a of these fastening systems 38 are assembled from above the ring, that is from the outside towards the inside thereof, and the tightening nuts 38b are fixed under the shoe holder 32.
  • the shoe holder 32 may be disposed in the radial extension of the journal 24 of the blade with which it is associated.
  • the shoe holder 32 is advantageously fixed under the control ring 26 by means of two fastening systems 38 which are arranged symmetrically on either side of the trunnion 24 of the blade with which it is associated .
  • the shoe holder can be angularly offset relative to the pin of the blade with which it is associated.
  • the tubular portion 34 of the shoe-holder 30 which extends longitudinally from the control ring 26 inwardly thereof and which terminates in the two fastening flanges 36 is adapted to receive, for example by sliding, a complementary tubular portion 40 of the pad 30.
  • the pad 30 is crimped at a free end of its tubular portion 40.
  • the device further comprises a screw 42 intended to be screwed into the tubular portion 40 of the pad 30 so as to allow adjustment of the radial position thereof.
  • the tubular portion 40 of the shoe 30 has an internal thread (not shown in the figures) complementary to that of the screw.
  • the adjusting screw 42 extends longitudinally from the control ring 26 inwardly thereof. As illustrated by figure 3 , the head of the screw 42 is thus trapped between the inner surface 26a of the ring 26 and the tubular portion 34 of the shoe holder 32.
  • Locking means of the adjusting screw 42 in the pad 30 are also provided to ensure a locking of the radial position thereof.
  • these locking means are in the form of a self-braking sleeve 44 interposed between the screw 42 and the tubular portion 40 of the shoe 30.
  • these locking means could be composed of an elliptical deformation of the tapping or a self-braking insert thread or any other known means of braking a screw in a threaded passage.
  • the respective tubular portions 34, 40 of the shoe holder 32 and the shoe 30 each have a substantially polygonal cross-section so as to lock the shoe 30 in rotation in the shoe holder 32.
  • these straight sections are thus substantially square in shape.
  • they could be rectangular, triangular, hexagonal, etc.
  • the adjustment of the radial position of the pad 30 with respect to the circular surface 28 is effected as follows.
  • the device is first fixed under the control ring 26 by means of the attachment systems 38.
  • the screw 42 By screwing more or less the screw 42 in the tubular portion 40 of the pad, the latter slides (without rotation) in the tubular portion 34 of the shoe holder 32 which is fixed.
  • the pad 30 can thus move radially relative to the circular surface 28.
  • the self-braking sleeve 44 (or any other equivalent means) then allows to block the adjustment of the pad thus made.
  • the access to the adjusting screw 42 can be effected either by dismounting beforehand the control lever 20 and the pin 24 which is associated with it when the shoe holder 32 is disposed in the radial extension thereof. (case of figure 3 ), or directly through a passage provided in the ring (not shown in the figures).
  • the device for adjusting the centering of the control ring further comprises a spring 46 which is interposed between the respective tubular portions 34, 40 of the shoe holder 32 and the shoe 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)

Description

Arrière-plan de l'inventionBackground of the invention

La présente invention se rapporte au domaine général des dispositifs de réglage du centrage d'un anneau de synchronisation de commande d'aubes pivotantes de turbomachine sur l'axe de celle-ci.The present invention relates to the general field of devices for adjusting the centering of a synchronization ring controlling turbomachine pivoting vanes on the axis thereof.

Dans une turbomachine, il est connu d'utiliser un ou plusieurs étages d'aubes de stator pour ajuster le flux et la direction d'écoulement des gaz traversant la section de compression en fonction du régime de fonctionnement de la turbomachine. Ces étages d'aubes de stator comportent une pluralité d'aubes (appelées aubes à calage variable) qui peuvent pivoter autour de leur axe de liaison au stator de manière à ce que leur angle de calage puisse être modifié en fonction du régime de fonctionnement de la turbomachine.In a turbomachine, it is known to use one or more stages of stator vanes for adjusting the flow and the flow direction of the gases passing through the compression section as a function of the operating speed of the turbomachine. These stator vane stages comprise a plurality of blades (called variable pitch vanes) which are pivotable about their stator connection axis so that their stall angle can be varied according to the operating speed of the stator. the turbomachine.

Les dispositifs connus pour la commande des aubes à calage variable comportent habituellement un organe de commande sous forme d'un anneau entourant un carter de la turbomachine et une pluralité de leviers ou biellettes, chaque biellette ayant une première extrémité reliée à l'anneau de commande par une articulation et une deuxième extrémité montée sur le pivot d'une aube respective. La modification synchronisée de la position angulaire des aubes est ainsi réalisée par rotation de l'anneau autour de l'axe de la turbomachine.Known devices for controlling the variable pitch vanes usually comprise a control member in the form of a ring surrounding a casing of the turbomachine and a plurality of levers or links, each link having a first end connected to the control ring by a hinge and a second end mounted on the pivot of a respective blade. The synchronized modification of the angular position of the blades is thus achieved by rotation of the ring around the axis of the turbomachine.

Afin d'améliorer le rendement des turbomachines, il est nécessaire d'augmenter la précision de l'angle de calage des aubes de stator. Pour ce faire, il est connu de chercher à assurer une excellente coaxialité entre l'anneau de commande de ces aubes et une surface circulaire de la turbomachine telle que l'enveloppe du carter. Cette coaxialité est généralement obtenue à l'aide de patins liés à l'anneau de commande par des dispositifs de montage et venant entourer l'enveloppe du carter avec un jeu très faible.In order to improve the efficiency of the turbomachines, it is necessary to increase the precision of the angle of adjustment of the stator vanes. To do this, it is known to seek to ensure excellent coaxiality between the control ring of these blades and a circular surface of the turbomachine such as the casing of the casing. This coaxiality is generally obtained using pads connected to the control ring by mounting devices and surrounding the casing housing with a very low clearance.

Les dispositifs de montage des patins sur l'anneau de commande doivent donc permettre le réglage des patins en direction radiale. On connaît ainsi le document US 5,387,080 qui divulgue un dispositif réglage de la coaxialité d'un anneau de commande utilisant des patins dont la position radiale est réglée grâce à une vis double dont les deux portions ont des angles d'hélice différant légèrement.The mounting devices of the pads on the control ring must therefore allow the adjustment of the pads in the radial direction. We thus know the document US5,387,080 which discloses a device adjusting the coaxiality of a control ring using skids whose radial position is adjusted by means of a double screw whose two portions have slightly different helix angles.

Avec ce type de dispositif, il a été constaté que pendant les différentes phases de fonctionnement de la turbomachine certains patins ne sont plus en contact avec l'enveloppe du carter, ce qui entraîne des vibrations provoquant une usure complète du filetage de la vis double. Il en résulte que le réglage du jeu entre les patins et l'enveloppe du carter n'est alors plus possible.With this type of device, it has been found that during the various phases of operation of the turbomachine some pads are no longer in contact with the casing of the casing, which causes vibrations causing complete wear of the thread of the double screw. As a result, adjustment of the clearance between the pads and the housing casing is then no longer possible.

En outre, avec ce dispositif, il n'est pas possible de démonter un ou plusieurs patins sans avoir à démonter l'ensemble des pièces de l'étage d'aubes à calage variable, et notamment l'anneau de commande. En effet, chaque patin est solidaire d'un porte-patin muni d'une tige qui traverse l'anneau de part en part et qui est vissée dans l'anneau par le dessous de celui-ci. Aussi, en raison de la présence de l'enveloppe de carter, il n'est plus possible de démonter un patin par le dessous de l'anneau.In addition, with this device, it is not possible to disassemble one or more pads without having to disassemble all the parts of the variable-pitch blade stage, and in particular the control ring. Indeed, each pad is secured to a shoe holder with a rod which passes through the ring from one side and which is screwed into the ring from below it. Also, due to the presence of the casing shell, it is no longer possible to disassemble a pad from below the ring.

EP 0,375,593 , EP 0,741,247 , FR 2,617,544 et EP 1,403,467 divulguent des dispositifs de réglage du centrage de l'anneau de commande selon le préambule de la revendication 1. EP 0,375,593 , EP 0.741.247 , FR 2,617,544 and EP 1,403,467 disclose centering adjustment devices of the control ring according to the preamble of claim 1.

Objet et résumé de l'inventionObject and summary of the invention

La présente invention a donc pour but principal de pallier de tels inconvénients en proposant un dispositif de réglage du centrage de l'anneau simple, fiable et permettant un gain de temps au montage et au démontage.The main object of the present invention is thus to overcome such disadvantages by proposing a device for adjusting the centering of the ring that is simple, reliable and which saves time during assembly and disassembly.

A cet effet, il est prévu un compresseur de turbomachine selon la revendication 1.For this purpose, a turbomachine compressor according to claim 1 is provided.

Par fixation sous l'anneau de commande, on entend une fixation du porte-patin contre une surface interne de l'anneau. Par assemblage par le dessus de l'anneau de commande, on entend un assemblage des systèmes d'attache par l'extérieur de l'anneau.Fixing under the control ring means a fixing of the shoe holder against an inner surface of the ring. By assembly from above the control ring is meant an assembly of fastening systems from the outside of the ring.

Le fait de fixer chaque porte-patin sous l'anneau en utilisant des systèmes d'attache assemblés par le dessus de l'anneau permet un démontage des systèmes d'attache par le dessus de l'anneau. Lorsque l'on souhaite intervenir sur un patin, il n'est donc pas nécessaire de démonter l'anneau de commande et chaque pièce du système de calage variable. De la sorte, le montage et le démontage des patins se trouvent grandement facilité.Attaching each shoe holder under the ring using fastening systems assembled from the top of the ring allows disassembly of the fastening systems from above the ring. When it is desired to intervene on a pad, it is therefore not necessary to disassemble the control ring and each piece of the variable locking system. In this way, the assembly and disassembly of the pads are greatly facilitated.

Selon l'invention, le dispositif comporte des moyens de réglage de la position radiale des patins.According to the invention, the device comprises means for adjusting the radial position of the pads.

Ainsi, le porte-patin comporte une partie sensiblement tubulaire qui s'étend longitudinalement depuis une surface interne de l'anneau de commande vers l'intérieur de celui-ci et qui est apte à recevoir une partie tubulaire complémentaire du patin, le dispositif comportant en outre une vis destinée à être vissée dans la partie tubulaire du patin de façon à permettre un réglage de la position radiale du patin.Thus, the shoe holder has a substantially tubular portion which extends longitudinally from an inner surface of the control ring towards the inside thereof and which is adapted to receive a complementary tubular portion of the shoe, the device comprising in addition, a screw intended to be screwed into the tubular portion of the pad so as to allow adjustment of the radial position of the pad.

Selon une autre caractéristique particulière de l'invention, le dispositif peut également comporter des moyens de blocage en rotation du patin dans le porte-patin.According to another particular characteristic of the invention, the device may also comprise means for locking the pad in rotation in the shoe-holder.

Selon encore une autre caractéristique particulière de l'invention, le dispositif peut aussi comporter des moyens de blocage de la vis dans le patin.According to yet another particular characteristic of the invention, the device may also comprise means for locking the screw in the pad.

De préférence, un ressort est intercalé entre la partie tubulaire du porte-patin et la partie tubulaire du patin de façon à assurer un amortissement du patin sur la surface circulaire.Preferably, a spring is interposed between the tubular portion of the shoe-holder and the tubular portion of the shoe so as to ensure damping of the shoe on the circular surface.

Chaque porte-patin peut être disposé dans le prolongement radial du tourillon de l'aube à laquelle il est associé. Dans ce cas, chaque porte-patin peut être avantageusement fixé sur l'anneau de commande au moyen de deux systèmes d'attache qui sont disposés symétriquement de part et d'autre du tourillon de l'aube à laquelle il est associé.Each shoe-holder may be disposed in the radial extension of the dovetail pin with which it is associated. In this case, each shoe holder can be advantageously fixed on the control ring by means of two attachment systems which are arranged symmetrically on either side of the blade of the blade with which it is associated.

Alternativement, chaque porte-patin peut être décalé angulairement par rapport au tourillon de l'aube à laquelle il est associé.Alternatively, each shoe-holder may be angularly offset relative to the pin of the blade with which it is associated.

De préférence, les systèmes d'attache se composent chacun d'une vis destinée à être vissée dans l'anneau de commande par le dessus de celui-ci et d'un écrou de serrage.Preferably, the fastening systems each consist of a screw to be screwed into the control ring from above and a clamping nut.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-dessous, en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Sur les figures :

  • la figure 1 représente schématiquement un étage d'aubes pivotantes à anneau de commande ;
  • la figure 2 est une vue en coupe d'un dispositif de réglage ne faisant pas partie de l'invention ;
  • la figure 3 est une vue en coupe d'un dispositif de réglage selon un mode de réalisation de l'invention ;
  • la figure 4 est une vue en coupe selon IV-IV de la figure 3 ; et
  • la figure 5 est une vue en coupe d'un dispositif de réglage selon un autre mode de réalisation de l'invention.
Other features and advantages of the present invention will emerge from the description given below, with reference to the accompanying drawings which illustrate an embodiment having no limiting character. In the figures:
  • the figure 1 schematically represents a stage of pivoting vanes with a control ring;
  • the figure 2 is a sectional view of a control device not forming part of the invention;
  • the figure 3 is a sectional view of an adjusting device according to an embodiment of the invention;
  • the figure 4 is a sectional view along IV-IV of the figure 3 ; and
  • the figure 5 is a sectional view of an adjusting device according to another embodiment of the invention.

Description détaillée d'un mode de réalisationDetailed description of an embodiment

La figure 1 représente partiellement un compresseur de turbomachine d'axe X-X. Le compresseur comporte une enveloppe annulaire de stator 10 qui est centrée sur l'axe X-X de la turbomachine et qui entoure un rotor annulaire 12 de manière à définir une veine annulaire 14 d'écoulement des gaz.The figure 1 partially represents a turbomachine compressor of axis XX. The compressor comprises an annular stator envelope 10 which is centered on the axis XX of the turbomachine and which surrounds an annular rotor 12 so as to define an annular stream 14 of gas flow.

Le compresseur comporte en outre une pluralité d'aubes qui forment plusieurs étages dans la veine d'écoulement 14, dont certains sont formés d'aubes à calage variable 16. Ces aubes à calage variable 16 sont pivotantes autour d'un axe 18 qui traverse l'enveloppe de stator 10.The compressor further comprises a plurality of blades which form several stages in the flow channel 14, some of which are formed of variable-pitch vanes 16. These variable-pitch vanes 16 are pivotable about an axis 18 which passes through the stator casing 10.

Chaque axe (ou pivot) 18 des aubes à calage variable 16 est relié à une extrémité d'une biellette ou levier de commande 20 par l'intermédiaire d'un embout 22. L'autre extrémité des biellettes 20 est articulée autour de tourillons 24 disposés radialement sur un anneau de commande 26 qui entoure une surface circulaire 28 centrée sur l'axe X-X de la turbomachine et à laquelle il doit être coaxial.Each axis (or pivot) 18 of the variable-pitch vanes 16 is connected to one end of a rod or control lever 20 via a nozzle 22. The other end of the rods 20 is articulated around pins 24 arranged radially on a control ring 26 which surrounds a circular surface 28 centered on the axis XX of the turbomachine and to which it must be coaxial.

L'invention vise un dispositif permettant de régler le centrage de l'anneau de commande 26 par rapport à l'axe X-X de la turbomachine. Plus précisément, un tel dispositif doit être capable de maintenir un espacement radial fixe entre l'anneau de commande 26 et la surface circulaire 28 qui est centrée sur l'axe X-X.The invention relates to a device for adjusting the centering of the control ring 26 relative to the axis XX of the turbomachine. More specifically, such a device must be able to maintain a fixed radial spacing between the control ring 26 and the circular surface 28 which is centered on the axis XX.

Comme illustré sur les figures 3 à 5, le dispositif de réglage du centrage de l'anneau de commande 26 selon l'invention comporte notamment une pluralité de patins 30 destinés à venir en contact de la surface circulaire 28.As illustrated on Figures 3 to 5 , the device for adjusting the centering of the control ring 26 according to the invention comprises in particular a plurality of pads 30 intended to come into contact with the circular surface 28.

On décrira maintenant le dispositif illustré par la figure 2 (ne faisant pas partie de l'invention mais utile à la compréhension de celle-ci).We will now describe the device illustrated by the figure 2 (not part of the invention but useful for understanding thereof).

Chaque patin 30 est solidaire d'un porte-patin 32. Le porte-patin 32 présente une partie 34 sensiblement tubulaire qui s'étend longitudinalement depuis une surface interne 26a de l'anneau de commande 26 vers l'intérieur de celui-ci. Le patin 30 est par exemple serti à l'extrémité libre de la partie tubulaire 34.Each shoe 30 is integral with a shoe holder 32. The shoe holder 32 has a substantially tubular portion 34 which extends longitudinally from an inner surface 26a of the control ring 26 inwardly thereof. The shoe 30 is for example crimped at the free end of the tubular portion 34.

Au niveau de son extrémité opposée au patin 30, la partie tubulaire 34 du porte-patin 32 se termine par deux brides de fixation 36 qui viennent en contact de la surface interne 26a de l'anneau 26.At its end opposite the shoe 30, the tubular portion 34 of the shoe holder 32 ends with two fastening flanges 36 which come into contact with the inner surface 26a of the ring 26.

Par l'intermédiaire de ces brides 36, des systèmes d'attache 38, par exemple de type boulonnage, permettent de fixer le porte-patin 32 sous l'anneau de commande 26. Sur l'exemple de réalisation de la figure 2, deux vis 38a traversent ainsi radialement l'anneau 26 et des écrous de serrage 38b sont vissés à leur extrémité libre contre les brides de fixation 36 du porte-patin 32.Through these flanges 36, fastening systems 38, for example bolting type, allow to fix the shoe holder 32 under the control ring 26. In the embodiment of the figure 2 two screws 38a thus traverse the ring 26 radially and clamping nuts 38b are screwed at their free end against the fastening flanges 36 of the shoe holder 32.

Comme illustré sur la figure 2, les vis 38a de ces systèmes d'attache 38 sont assemblées par le dessus de l'anneau, c'est-à-dire de l'extérieur vers l'intérieur de celui-ci, et les écrous de serrage 38b sont fixés sous le porte-patin 32.As illustrated on the figure 2 , the screws 38a of these fastening systems 38 are assembled from above the ring, that is from the outside towards the inside thereof, and the tightening nuts 38b are fixed under the shoe holder 32.

Ainsi, il est possible d'agir aisément sur les écrous de serrage 38b par le dessous de l'anneau et de dévisser les vis 38a par le dessus de l'anneau sans avoir à démonter l'anneau de commande et les pièces fixées sur celui-ci. De la sorte, le démontage du porte-patin 32 peut être réalisé simplement en agissant sur ces systèmes d'attache et sans avoir à toucher à l'anneau de commande.Thus, it is possible to easily act on the tightening nuts 38b from below the ring and to unscrew the screws 38a from above the ring without having to disassemble the control ring and the parts fixed on the ring. -this. In this way, the disassembly of the shoe holder 32 can be achieved simply by acting on these fastening systems and without having to touch the control ring.

Comme le montre l'exemple de la figure 2, le porte-patin 32 peut être disposé dans le prolongement radial du tourillon 24 de l'aube à laquelle il est associé. Dans ce cas, le porte-patin 32 est avantageusement fixé sous l'anneau de commande 26 au moyen de deux systèmes d'attache 38 qui sont disposés symétriquement de part et d'autre du tourillon 24 de l'aube à laquelle il est associé.As the example of the figure 2 , the shoe holder 32 may be disposed in the radial extension of the journal 24 of the blade with which it is associated. In this case, the shoe holder 32 is advantageously fixed under the control ring 26 by means of two fastening systems 38 which are arranged symmetrically on either side of the trunnion 24 of the blade with which it is associated .

Alternativement, selon une variante de réalisation non représentée sur les figures, le porte-patin peut être décalé angulairement par rapport au tourillon de l'aube à laquelle il est associé.Alternatively, according to an alternative embodiment not shown in the figures, the shoe holder can be angularly offset relative to the pin of the blade with which it is associated.

Dans l'exemple de réalisation de la figure 2, on remarquera également que la position radiale du patin 30 par rapport à la surface circulaire 28 n'est pas réglable. Cette solution nécessite donc de bien maîtriser les tolérances dimensionnelles des pièces du dispositif pour assurer un jeu fonctionnel entre le patin et la surface circulaire.In the exemplary embodiment of the figure 2 it will also be noted that the radial position of the shoe 30 with respect to the circular surface 28 is not adjustable. This solution therefore requires good control of the dimensional tolerances of the parts of the device to ensure a functional clearance between the pad and the circular surface.

On décrira maintenant le mode de réalisation du dispositif de l'invention illustré par les figures 3 et 4. Les éléments en commun avec le dispositif de la figure 2 sont identifiés par les mêmes références et ne seront donc pas décrits à nouveau.We will now describe the embodiment of the device of the invention illustrated by the Figures 3 and 4 . The elements in common with the device of the figure 2 are identified by the same references and will not be described again.

Par rapport au mode de réalisation décrit précédemment, la partie tubulaire 34 du porte-patin 30 qui s'étend longitudinalement depuis l'anneau de commande 26 vers l'intérieur de celui-ci et qui se termine par les deux brides de fixation 36 est apte à recevoir, par exemple par coulissement, une partie tubulaire complémentaire 40 du patin 30. Dans cette situation, le patin 30 est serti à une extrémité libre de sa partie tubulaire 40.Compared to the embodiment described above, the tubular portion 34 of the shoe-holder 30 which extends longitudinally from the control ring 26 inwardly thereof and which terminates in the two fastening flanges 36 is adapted to receive, for example by sliding, a complementary tubular portion 40 of the pad 30. In this situation, the pad 30 is crimped at a free end of its tubular portion 40.

Le dispositif comporte en outre une vis 42 destinée à être vissée dans la partie tubulaire 40 du patin 30 de façon à permettre un réglage de la position radiale de celui-ci. A cet effet, la partie tubulaire 40 du patin 30 présente un taraudage interne (non représenté sur les figures) complémentaire à celui de la vis.The device further comprises a screw 42 intended to be screwed into the tubular portion 40 of the pad 30 so as to allow adjustment of the radial position thereof. For this purpose, the tubular portion 40 of the shoe 30 has an internal thread (not shown in the figures) complementary to that of the screw.

La vis de réglage 42 s'étend longitudinalement depuis l'anneau de commande 26 vers l'intérieur de celui-ci. Comme illustré par la figure 3, la tête de la vis 42 est ainsi emprisonnée entre la surface interne 26a de l'anneau 26 et la partie tubulaire 34 du porte-patin 32.The adjusting screw 42 extends longitudinally from the control ring 26 inwardly thereof. As illustrated by figure 3 , the head of the screw 42 is thus trapped between the inner surface 26a of the ring 26 and the tubular portion 34 of the shoe holder 32.

Des moyens de blocage de la vis de réglage 42 dans le patin 30 sont par ailleurs prévus afin d'assurer un blocage de la position radiale de celui-ci.Locking means of the adjusting screw 42 in the pad 30 are also provided to ensure a locking of the radial position thereof.

Sur l'exemple des figures 3 et 4, ces moyens de blocage se présentent sous la forme d'une douille auto-freinante 44 interposée entre la vis 42 et la partie tubulaire 40 du patin 30. Alternativement, ces moyens de blocage pourraient être composés d'une déformation elliptique du taraudage ou d'un filet rapporté auto-freinant ou de tout autre moyen connu de freinage d'une vis dans un passage taraudé.On the example of Figures 3 and 4 these locking means are in the form of a self-braking sleeve 44 interposed between the screw 42 and the tubular portion 40 of the shoe 30. Alternatively, these locking means could be composed of an elliptical deformation of the tapping or a self-braking insert thread or any other known means of braking a screw in a threaded passage.

Selon une caractéristique avantageuse de l'invention, les parties tubulaires 34, 40 respectives du porte-patin 32 et du patin 30 présentent chacune une section droite sensiblement polygonale de façon à bloquer en rotation le patin 30 dans le porte-patin 32.According to an advantageous characteristic of the invention, the respective tubular portions 34, 40 of the shoe holder 32 and the shoe 30 each have a substantially polygonal cross-section so as to lock the shoe 30 in rotation in the shoe holder 32.

Sur l'exemple de la figure 4, ces sections droites sont ainsi de forme sensiblement carrée. Alternativement, elles pourraient être rectangulaire, triangulaire, hexagonale, etc.On the example of the figure 4 these straight sections are thus substantially square in shape. Alternatively, they could be rectangular, triangular, hexagonal, etc.

Le réglage de la position radiale du patin 30 par rapport à la surface circulaire 28 s'effectue de la manière suivante. Le dispositif est d'abord fixé sous l'anneau de commande 26 au moyen des systèmes d'attache 38. En vissant plus ou moins la vis 42 dans la partie tubulaire 40 du patin, cette dernière coulisse (sans rotation) dans la partie tubulaire 34 du porte-patin 32 qui est fixe.The adjustment of the radial position of the pad 30 with respect to the circular surface 28 is effected as follows. The device is first fixed under the control ring 26 by means of the attachment systems 38. By screwing more or less the screw 42 in the tubular portion 40 of the pad, the latter slides (without rotation) in the tubular portion 34 of the shoe holder 32 which is fixed.

Sous l'effet du vissage, le patin 30 peut ainsi se déplacer radialement par rapport à la surface circulaire 28. La douille auto-freinante 44 (ou tout autre moyen équivalent) permet alors de bloquer le réglage du patin ainsi effectué.Under the effect of the screwing, the pad 30 can thus move radially relative to the circular surface 28. The self-braking sleeve 44 (or any other equivalent means) then allows to block the adjustment of the pad thus made.

On notera que l'accès à la vis de réglage 42 peut s'effectuer soit en démontant au préalable le levier de commande 20 et le tourillon 24 qui lui est associé lorsque le porte-patin 32 est disposé dans le prolongement radial de celui-ci (cas de la figure 3), soit directement au travers d'un passage prévu dans l'anneau (cas non représenté sur les figures).It will be noted that the access to the adjusting screw 42 can be effected either by dismounting beforehand the control lever 20 and the pin 24 which is associated with it when the shoe holder 32 is disposed in the radial extension thereof. (case of figure 3 ), or directly through a passage provided in the ring (not shown in the figures).

On décrira maintenant le mode de réalisation du dispositif de l'invention illustré par la figure 5. Les éléments en commun avec le dispositif des figures 3 et 4 sont identifiés par les mêmes références et ne seront donc pas décrits à nouveau.We will now describe the embodiment of the device of the invention illustrated by the figure 5 . The elements in common with the device of Figures 3 and 4 are identified by the same references and will not be described again.

Par rapport au mode de réalisation décrit précédemment, le dispositif de réglage du centrage de l'anneau de commande comporte en outre un ressort 46 qui est intercalé entre les parties tubulaires 34, 40 respectives du porte-patin 32 et du patin 30.Compared to the embodiment described above, the device for adjusting the centering of the control ring further comprises a spring 46 which is interposed between the respective tubular portions 34, 40 of the shoe holder 32 and the shoe 30.

La présence d'un tel ressort 46 a pour effet d'assurer, sur l'ensemble de l'anneau de commande 26, un amortissement des patins 30 sur la surface circulaire 28.The presence of such a spring 46 has the effect of ensuring, over the entire control ring 26, a damping of the pads 30 on the circular surface 28.

Par l'intermédiaire de tels ressorts, il est en effet possible d'amortir les vibrations qui se produisent au niveau de l'anneau de commande 26 et qui sont transmises aux patins 30. De la sorte, l'adjonction d'un ressort entre le porte-patin et le patin permet d'avoir un contact permanent entre la surface circulaire 28 et les patins 30 pendant les différentes phases de fonctionnement de la turbomachine.By means of such springs, it is indeed possible to damp the vibrations that occur at the control ring 26 and which are transmitted to the pads 30. In this way, the addition of a spring between the shoe-holder and the shoe makes it possible to have a permanent contact between the circular surface 28 and the shoes 30 during the various phases of operation of the turbomachine.

Claims (9)

  1. A turbomachine compressor comprising a device for adjusting the centering of a control ring (26) for pivoting vanes (16) of a turbomachine, the device comprising a plurality of pads (30) for coming into contact with a circular surface (28) that is coaxial with the ring (26), each pivoting vane (16) being connected to the control ring (26) via a lever (20) having a first end secured to the control ring via a crank pin (24) disposed radially on said ring, and a second end mounted on a pivot (18) of the vane (16), each of said pads (30) being secured to a pad carrier (32), wherein each pad carrier (32) being secured under the control ring (26) by attachment systems (38) that are designed to be assembled from over the ring, characterised in that each pad carrier (32) comprises a substantially tubular portion (34) extending longitudinally from the inside surface (26a) of the control ring (26) towards the inside thereof and suitable for receiving a complementary tubular portion (40) of the pad (30), the device further comprising a screw (42) for screwing into the complementary tubular portion (40) of the pad in such a manner as to enable the radial position of the pad to be adjusted.
  2. A compressor according to claim 1, characterised in that it further comprises means for locking the pad (30) against turning relative to the pad carrier (32).
  3. A compressor according to claim 2, characterised in that the respective tubular portions (34, 40) of the pad carrier (32) and of the pad (30) present respective right sections that are substantially polygonal so as to prevent the pad (30) from turning in the pad carrier (32).
  4. A compressor according to any one of claims 1 to 3, characterised in that it further comprises means (44) for locking the adjustment screw (42) in the pad (30).
  5. A compressor according to any one of claims 1 to 4, characterised in that it further comprises a spring (46) that is interposed between the tubular portion (34) of the pad carrier (32) and the tubular portion (40) of the pad (30) so as to provide a damping of the pad against the circular surface (28).
  6. A compressor according to any one of claims 1 to 5, characterised in that each pad carrier (32) is disposed radially in line with the crank pin (24) of the vane with which it is associated.
  7. A compressor according to claim 6, characterised in that each pad carrier (32) is secured to the control ring (26) by means of two attachment systems (38) that are disposed symmetrically on either side of the crank pin (24) of the vane with which it is associated.
  8. A compressor according to any one of claims 1 to 5, characterised in that each pad carrier (32) is angularly offset relative to the crank pin (24) of the vane with which it is associated.
  9. A compressor according to any one of claims 1 to 8, characterised in that each attachment system (38) comprises a screw (38a) for screwing into the control ring (26) from the outside thereof and a clamping nut (38b).
EP06110207.5A 2005-02-25 2006-02-21 Regulation device for centering the unison ring for the variable stator vanes of a turbomachine. Active EP1696134B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0501931A FR2882578B1 (en) 2005-02-25 2005-02-25 DEVICE FOR ADJUSTING THE CENTERING OF A SYNCHRONIZATION RING FOR THE CONTROL OF TURBOMACHINE SWIVELING BLADES

Publications (3)

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EP1696134A2 EP1696134A2 (en) 2006-08-30
EP1696134A3 EP1696134A3 (en) 2012-11-14
EP1696134B1 true EP1696134B1 (en) 2014-04-02

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EP06110207.5A Active EP1696134B1 (en) 2005-02-25 2006-02-21 Regulation device for centering the unison ring for the variable stator vanes of a turbomachine.

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US (1) US7244098B2 (en)
EP (1) EP1696134B1 (en)
JP (1) JP4887059B2 (en)
CN (1) CN1824957B (en)
CA (1) CA2537435C (en)
FR (1) FR2882578B1 (en)
RU (1) RU2395694C2 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897121B1 (en) * 2006-02-09 2008-05-02 Snecma Sa DEVICE FOR ADJUSTING THE CENTERING OF A SYNCHRONIZATION RING FOR THE CONTROL OF TURBOMACHINE SWIVELING BLADES
US8092157B2 (en) * 2007-12-19 2012-01-10 United Technologies Corporation Variable turbine vane actuation mechanism having a bumper ring
EP2107217A1 (en) * 2008-03-31 2009-10-07 Siemens Aktiengesellschaft Unison ring assembly for an axial compressor casing
US8864450B2 (en) * 2011-02-01 2014-10-21 United Technologies Corporation Gas turbine engine synchronizing ring bumper
US8794910B2 (en) * 2011-02-01 2014-08-05 United Technologies Corporation Gas turbine engine synchronizing ring bumper
EP2900955B1 (en) 2012-09-28 2017-08-30 United Technologies Corporation Synchronization ring runner with cradle
US20140093362A1 (en) * 2012-09-28 2014-04-03 United Technologies Corporation Gas turbine engine components and method of assembly
FR3024996B1 (en) * 2014-08-22 2019-03-22 Safran Aircraft Engines CONTROL RING OF A VARIABLE SHIFT AUBRA STAGE FOR A TURBOMACHINE
JP2017527733A (en) 2014-09-12 2017-09-21 ゼネラル・エレクトリック・カンパニイ Axial flow-centrifugal compressor with variable output guide vanes
EP3000985B1 (en) * 2014-09-29 2021-05-26 Rolls-Royce North American Technologies, Inc. Unison ring self-centralizers and method of centralizing
RU2561371C1 (en) * 2014-10-15 2015-08-27 Открытое акционерное общество "Уфимское моторостроительное производственное объединение" ОАО "УМПО" Compressor stator of gas-turbine engine
FR3029562B1 (en) * 2014-12-09 2016-12-09 Snecma CONTROL RING OF A VARIABLE SHIFT AUBRA STAGE FOR A TURBOMACHINE
JP6674763B2 (en) * 2015-11-04 2020-04-01 川崎重工業株式会社 Variable vane operating device
GB2557565A (en) * 2016-07-18 2018-06-27 Rolls Royce Plc Variable stator vane mechanism
DE102016215807A1 (en) * 2016-08-23 2018-03-01 MTU Aero Engines AG Inner ring for a vane ring of a turbomachine
GB201614803D0 (en) * 2016-09-01 2016-10-19 Rolls Royce Plc Variable stator vane rigging
US10753224B2 (en) * 2017-04-27 2020-08-25 General Electric Company Variable stator vane actuator overload indicating bushing
DE102017109952A1 (en) * 2017-05-09 2018-11-15 Rolls-Royce Deutschland Ltd & Co Kg Rotor device of a turbomachine
FR3077851B1 (en) * 2018-02-09 2020-01-17 Safran Aircraft Engines CONTROL ASSEMBLY OF A VARIABLE SETTING BLADE STAGE FOR A TURBOMACHINE
US10801362B2 (en) 2018-06-19 2020-10-13 General Electric Company Self centering unison ring
DE102018210601A1 (en) * 2018-06-28 2020-01-02 MTU Aero Engines AG SEGMENT RING FOR ASSEMBLY IN A FLOWING MACHINE
US10815820B2 (en) 2019-02-05 2020-10-27 Raytheon Technologies Corporation Integral shear locking bumper for gas turbine engine
FR3119859B1 (en) * 2021-02-15 2024-01-12 Safran Aircraft Engines CONTROL RING OF A STAGE OF VARIABLE PITCH BLADE FOR A TURBOMACHINE
US11505306B2 (en) 2021-04-05 2022-11-22 General Electric Company Variable pitch fan assembly with remote counterweights
US11920482B2 (en) * 2022-03-10 2024-03-05 General Electric Company Device for fixing position of adjustable rows of guide vanes of turbomachine
CN116733609B (en) * 2023-08-16 2023-10-31 成都市鸿侠科技有限责任公司 Aeroengine intake duct extension board shock-absorbing structure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6121840A (en) * 1984-07-10 1986-01-30 Nissan Motor Co Ltd Sealing structure for openable/closable body of car
GB2206381B (en) 1987-06-30 1991-10-09 Rolls Royce Plc A variable stator vane arrangement for a compressor
US4826399A (en) * 1988-05-06 1989-05-02 General Motors Corporation Unison ring mounting arrangement
US4925364A (en) * 1988-12-21 1990-05-15 United Technologies Corporation Adjustable spacer
CA2082709A1 (en) * 1991-12-02 1993-06-03 Srinivasan Venkatasubbu Variable stator vane assembly for an axial flow compressor of a gas turbine engine
FR2699595B1 (en) * 1992-12-23 1995-01-20 Snecma Device for guiding in rotation a control ring for pivoting vanes.
DE19516382A1 (en) * 1995-05-04 1996-11-07 Deutsche Forsch Luft Raumfahrt Adjustment ring
US6884025B2 (en) 2002-09-30 2005-04-26 United Technologies Corporation Shim lock/pin anti-rotation bumper design

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Publication number Publication date
RU2395694C2 (en) 2010-07-27
CN1824957B (en) 2012-05-16
FR2882578B1 (en) 2007-05-25
US7244098B2 (en) 2007-07-17
EP1696134A2 (en) 2006-08-30
US20060193720A1 (en) 2006-08-31
EP1696134A3 (en) 2012-11-14
CA2537435A1 (en) 2006-08-25
CA2537435C (en) 2013-06-18
FR2882578A1 (en) 2006-09-01
CN1824957A (en) 2006-08-30
JP2006233969A (en) 2006-09-07
RU2006105521A (en) 2007-08-27
JP4887059B2 (en) 2012-02-29

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