EP1498579A1 - Retaining device for mounting a flask onto a rotor - Google Patents

Retaining device for mounting a flask onto a rotor Download PDF

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Publication number
EP1498579A1
EP1498579A1 EP20040291803 EP04291803A EP1498579A1 EP 1498579 A1 EP1498579 A1 EP 1498579A1 EP 20040291803 EP20040291803 EP 20040291803 EP 04291803 A EP04291803 A EP 04291803A EP 1498579 A1 EP1498579 A1 EP 1498579A1
Authority
EP
European Patent Office
Prior art keywords
flange
diameter
foot
rod
recess
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.)
Granted
Application number
EP20040291803
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German (de)
French (fr)
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EP1498579B1 (en
Inventor
Kamel Benderradji
Marc Marchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
SNECMA SAS
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Publication date
Application filed by SNECMA Moteurs SA, SNECMA SAS filed Critical SNECMA Moteurs SA
Publication of EP1498579A1 publication Critical patent/EP1498579A1/en
Application granted granted Critical
Publication of EP1498579B1 publication Critical patent/EP1498579B1/en
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Classifications

    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/501—Elasticity

Definitions

  • the invention relates to a device for retaining a flange annular against a radial face of a disk and rotor.
  • a device for retaining a annular flange against a radial face of a rotor disc said disc having in said radial face an annular recess delimited by several walls, one of which is formed by the inner face of a flange which extends radially outwards, and said flange having, in its radially inner part, an annular base bearing against the wall radially outside the recess and a foot that extends radially inwards in the recess from the base, said device having a split annular retaining ring disposed in the recess, this ring having a first radial surface abutting against the inner face of the flange, a second radial surface abutting against the axially outer face of the foot and a peripheral surface in stop against said foot or said base.
  • the flange is intended to prevent the Axial displacement of fir-type vane blades whose feet are mounted in axial notches provided on the periphery of the disc of rotor.
  • To mount the flange we first have the annular ring split in the recess of the disc, and then compressed radially towards inside the recess by means of tools pressing on the wall ring device until these tools come to press the flange of the disc. Then, slide the base of the flange along the radially outer wall of the recess.
  • the ring has at its axially inner end a rabbet device in which the radially inner portion of the foot.
  • the outer diameter of the ring is smaller than the inner diameter the base of the flange to allow the release of the tools of compression during assembly and their introduction during disassembly possible.
  • the diameter of the bore of the flange foot is greater than diameter of the flange to allow the introduction of the inner portion of the flange in the recess around the compression tools in support against the periphery of the flange.
  • the flange being subjected to axial stresses during shocks on blades because of the ingestion of debris, which is taken up by the retaining ring there are shear moments on the ring because of the differences in diameter between the bore of the foot and the flange.
  • the manufacture of this ring requires expensive machining.
  • the retaining ring remains in the recess when dismounting the flange for repair or replacement of a dawn for example.
  • This ring is thus different from a circlip traditional that is expanded by means of a piece for its implementation around a tree and retracts elastically into a throat arranged on the periphery of the tree.
  • the object of the invention is to propose a retention system axial axis of a rotor disc flange that is simple to perform and little expensive and which makes it easier to assemble the parts.
  • the invention achieves its goal by the fact that the ring is formed by a rod interposed axially between the foot of the flange and the flange, and whose peripheral surface abuts against the base, said peripheral surface and said flange comprising in correspondence notches opening outwards and intended to receive tools for compression of said ring which retract into the contour of the flange when mounting or dismounting said flange.
  • This groove preferably has a U-shaped section and the rod has opposite planar radial faces.
  • the axial width of the groove is equal to or slightly greater than the thickness of the ring.
  • the foot of the flange has a bore whose diameter is substantially equal to the diameter of the flange.
  • the terms “inside” and “outside” designate a wall or a surface respectively near or far from the axis of rotation of the disk
  • the terms “internal” and “external” refer to a wall or a surface respectively close to or distant from the plane median of the disc 1.
  • the annular recess 7 is delimited radially on the outside by a substantially cylindrical wall 9 connected by a surface concave 10a an annular groove 12, of U-section, arranged behind a flange 13 which extends radially outwards and whose diameter is slightly greater than the diameter of the shoulder 14 formed by the concave surface 10 and the inner axial face of the groove 12.
  • the radially inner portion 6 of the flange 5 has a base 15 which extends into the recess 7 and which has a surface cylindrical peripheral 15a which bears against the cylindrical wall 9, and a foot 16 disposed under the base 15 and which extends radially towards inside.
  • the diameter of the bore 17 of the foot 16 is substantially equal or slightly greater than the diameter of the flange 13, in order to allow introducing the radially inner portion 6 of the flange 5 into the recess 7 during assembly, or its extraction for the needs of repair or maintenance of the blades 3.
  • the outer face 18 of the foot 16 is disposed in a radial plane passing through the groove 12 in the vicinity of the shoulder 14. This face 18 is connected to the radially inner face of the base 15, and forms with the latter a rabbet 19.
  • the ring 8 has two parallel axial faces perpendicular to the axis of rotation of the disc 1, namely an axial face external 20 bearing against the inner face of the flange 13 and a face internal axial 21 bearing against the outer face 18 of the foot 16 and its peripheral surface 22 bears against the radially inner face from the base 15.
  • the depth of the groove 7 is calculated to allow the retraction of the claws 25, during the compression of the rod 8.
  • the inner diameter of the rod 8, not subject to constraints, is preferably smaller than the diameter of the shoulder 14, so that the 8 is correctly positioned with respect to the groove when setting in place of the claws 25 in the notches 30b of the ring 8.
  • the rod 8 which is in the form of a split washer, is easy to manufacture and inexpensive.
  • the volume of the recess 7 can be limited to the maximum, which reinforces the periphery of the disc 1 which, in general, is subject to considerable centrifugal forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

The device has a split ring arranged in a recess (7) and having a rod (8) placed between bottom of an end cover (5) and a flange (13), and a peripheral surface against an annular base. The surface and the flange have notches (30a, 30b) opening radially towards outside and receiving prongs of the rod. The prongs are concealed in the edge of the flange during assembling or disassembling of the cover.

Description

L'invention concerne un dispositif de rétention d'un flasque annulaire contre une face radiale d'un disque et rotor.The invention relates to a device for retaining a flange annular against a radial face of a disk and rotor.

Elle concerne plus précisément un dispositif pour retenir un flasque annulaire contre une face radiale d'un disque de rotor, ledit disque présentant dans ladite face radiale un évidement annulaire délimité par plusieurs parois dont l'une est formée par la face interne d'une bride qui s'étend radialement vers l'extérieur, et ledit flasque présentant, dans sa partie radialement intérieure, une base annulaire en appui contre la paroi radialement extérieure de l'évidement et un pied qui s'étend radialement vers l'intérieur dans l'évidement à partir de la base, ledit dispositif comportant une bague de retenue annulaire fendue disposée dans l'évidement, cette bague ayant une première surface radiale en butée contre la face interne de la bride, une deuxième surface radiale en butée contre la face axialement externe du pied et une surface périphérique en butée contre ledit pied ou ladite base.It concerns more precisely a device for retaining a annular flange against a radial face of a rotor disc, said disc having in said radial face an annular recess delimited by several walls, one of which is formed by the inner face of a flange which extends radially outwards, and said flange having, in its radially inner part, an annular base bearing against the wall radially outside the recess and a foot that extends radially inwards in the recess from the base, said device having a split annular retaining ring disposed in the recess, this ring having a first radial surface abutting against the inner face of the flange, a second radial surface abutting against the axially outer face of the foot and a peripheral surface in stop against said foot or said base.

Un tel dispositif est connu par FR A 2 485 117, équivalent à US 4 304 523. Dans ce document, le flasque est prévu pour empêcher le déplacement axial d'aubes de type à attache sapin dont les pieds sont montés dans des encoches axiales prévues à la périphérie du disque de rotor. Pour monter le flasque, on dispose d'abord la bague annulaire fendue dans l'évidement du disque, puis on la comprime radialement vers l'intérieur de l'évidement au moyen d'outils appuyant sur la paroi périphérique de l'anneau jusqu'à ce que ces outils viennent appuyer sur la bride du disque. Ensuite, on fait coulisser la base du flasque le long de la paroi radialement extérieure de l'évidement.Such a device is known from FR A 2 485 117, equivalent to US 4,304,523. In this document, the flange is intended to prevent the Axial displacement of fir-type vane blades whose feet are mounted in axial notches provided on the periphery of the disc of rotor. To mount the flange, we first have the annular ring split in the recess of the disc, and then compressed radially towards inside the recess by means of tools pressing on the wall ring device until these tools come to press the flange of the disc. Then, slide the base of the flange along the radially outer wall of the recess.

On exerce une force axiale contre le flasque afin que le pied vienne en appui contre la paroi radiale interne de l'évidement. On relâche alors les outils qui comprimaient la bague annulaire. Cette dernière s'expanse radialement vers l'extérieur.It exerts an axial force against the flange so that the foot come to bear against the inner radial wall of the recess. We release then the tools that compressed the ring ring. This last expands radially outward.

Ensuite, on supprime la force axiale exercée sur le flasque. La bague présente à son extrémité axialement intérieure une feuillure périphérique dans laquelle vient loger la portion radialement intérieure du pied. Le diamètre extérieur de la bague est inférieur au diamètre intérieur de la base du flasque afin de permettre le dégagement des outils de compression lors du montage et leur introduction lors d'un démontage éventuel. Le diamètre de l'alésage du pied du flasque est supérieur au diamètre de la bride pour permettre l'introduction de la portion interne du flasque dans l'évidement autour des outils de compression en appui contre la périphérie de la bride.Then, the axial force exerted on the flange is eliminated. The ring has at its axially inner end a rabbet device in which the radially inner portion of the foot. The outer diameter of the ring is smaller than the inner diameter the base of the flange to allow the release of the tools of compression during assembly and their introduction during disassembly possible. The diameter of the bore of the flange foot is greater than diameter of the flange to allow the introduction of the inner portion of the flange in the recess around the compression tools in support against the periphery of the flange.

Le flasque étant soumis à des sollicitations axiales lors de chocs sur les aubes par suite de l'ingestion de débris, qui sont reprises par l'anneau de retenue, il se produit des couples de cisaillement sur la bague du fait des écarts de diamètre entre l'alésage du pied et la bride. Ceci exige que l'anneau de retenue soit massif, tout en étant suffisamment souple pour permettre sa compression et son installation dans l'évidement. La fabrication de cette bague nécessite un usinage coûteux.The flange being subjected to axial stresses during shocks on blades because of the ingestion of debris, which is taken up by the retaining ring there are shear moments on the ring because of the differences in diameter between the bore of the foot and the flange. This requires that the retaining ring be massive, while being sufficiently flexible to allow compression and installation in the recess. The manufacture of this ring requires expensive machining.

FR 2 812 906 a proposé un anneau de retenue modifié qui présente à la périphérie de sa face radiale externe un chanfrein qui permet la compression automatique de ladite bague lors du passage du pied du flasque au cours du montage. Ce pied comporte des encoches pour permettre l'introduction d'outils de compression de la bague pour le démontage. Cette bague est également massive et nécessite un usinage coûteux.FR 2 812 906 proposed a modified retaining ring which present at the periphery of its outer radial face a chamfer which allows the automatic compression of said ring during the passage of foot of the flange during assembly. This foot has notches to allow the introduction of compression tools of the ring for the disassembly. This ring is also massive and requires machining expensive.

Il est à noter que la bague de retenue reste dans l'évidement lors du démontage du flasque pour réparation ou remplacement d'une aube par exemple. Cette bague est ainsi différente d'un circlips traditionnel que l'on expanse au moyen d'une pièce pour sa mise en place autour d'un arbre et qui se rétracte élastiquement dans une gorge ménagée à la périphérie de l'arbre.It should be noted that the retaining ring remains in the recess when dismounting the flange for repair or replacement of a dawn for example. This ring is thus different from a circlip traditional that is expanded by means of a piece for its implementation around a tree and retracts elastically into a throat arranged on the periphery of the tree.

Le but de l'invention est de proposer un système de rétention axial d'un flasque de disque de rotor qui soit simple à réaliser et peu coûteux et qui permette de faciliter le montage des pièces.The object of the invention is to propose a retention system axial axis of a rotor disc flange that is simple to perform and little expensive and which makes it easier to assemble the parts.

L'invention atteint son but par le fait que la bague est constituée par un jonc interposé axialement entre le pied du flasque et la bride, et dont la surface périphérique est en butée contre la base, ladite surface périphérique et ladite bride comportant en correspondance des encoches débouchant vers l'extérieur et destinées à recevoir des outils de compression dudit jonc qui s'escamotent dans le contour de la bride lors du montage ou du démontage dudit flasque.The invention achieves its goal by the fact that the ring is formed by a rod interposed axially between the foot of the flange and the flange, and whose peripheral surface abuts against the base, said peripheral surface and said flange comprising in correspondence notches opening outwards and intended to receive tools for compression of said ring which retract into the contour of the flange when mounting or dismounting said flange.

Très avantageusement, la portion radialement intérieure du jonc loge dans une rainure ménagée derrière la bride. Very advantageously, the radially inner portion of the ring is housed in a groove formed behind the flange.

Cette rainure a de préférence une section en U et le jonc présente des faces radiales opposées planes. La largeur axiale de la rainure est égale ou légèrement supérieure à l'épaisseur du jonc.This groove preferably has a U-shaped section and the rod has opposite planar radial faces. The axial width of the groove is equal to or slightly greater than the thickness of the ring.

Le pied du flasque présente un alésage dont le diamètre est sensiblement égal au diamètre de la bride.The foot of the flange has a bore whose diameter is substantially equal to the diameter of the flange.

D'autres avantages et caractéristiques de l'invention ressortiront à la lecture de la description suivante faite à titre d'exemple et en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective d'une partie d'un disque de rotor de turbomachine équipée d'un flasque de retenue d'aubes, ces aubes n'étant pas montrées sur cette figure par souci de clarté,
  • la figure 2 est une coupe selon un plan contenant l'axe de rotation du disque aubagé de la figure 1 ;
  • la figure 3 montre le positionnement du jonc avant la mise en place du flasque ; et
  • les figures 4 à 6 montrent les diverses étapes du montage du flasque.
Other advantages and characteristics of the invention will become apparent on reading the following description given by way of example and with reference to the appended drawings in which:
  • FIG. 1 is a perspective view of a portion of a turbomachine rotor disk equipped with a blade retaining flange, these blades not being shown in this figure for the sake of clarity,
  • Figure 2 is a section along a plane containing the axis of rotation of the blisk of Figure 1;
  • Figure 3 shows the positioning of the rod before the establishment of the flange; and
  • Figures 4 to 6 show the various stages of mounting the flange.

Les dessins montrent un disque 1 de turbomachine qui comporte à sa périphérie une pluralité d'alvéoles 2 sensiblement axiales, destinées à recevoir des pieds d'aubes 3 qui s'étendent radialement vers l'extérieur. Ces aubes sont immobilisées axialement au moins sur une face 4 du disque 1 par un flasque annulaire 5 dont la portion 6 radialement intérieure loge dans un évidement annulaire 7 ménagé dans la face 4 et y est immobilisée par une bague de retenue qui, selon l'invention, se présente sous la forme d'un jonc 8 fendu.The drawings show a turbomachine disk 1 which has at its periphery a plurality of substantially axial cells 2, intended to receive blade roots 3 which extend radially towards outside. These blades are immobilized axially at least on one side 4 of the disc 1 by an annular flange 5 whose portion 6 radially interior is housed in an annular recess 7 formed in the face 4 and is immobilized by a retaining ring which, according to the invention, is present in the form of a slotted ring 8.

Dans le présent mémoire, les termes "intérieur" et "extérieur" désignent une paroi ou une surface respectivement proche ou éloignée de l'axe de rotation du disque, et les termes "interne" et "externe" désignent une paroi ou une surface respectivement proche ou éloignée du plan médian du disque 1.In this memo, the terms "inside" and "outside" designate a wall or a surface respectively near or far from the axis of rotation of the disk, and the terms "internal" and "external" refer to a wall or a surface respectively close to or distant from the plane median of the disc 1.

L'évidement annulaire 7 est délimité radialement à l'extérieur par une paroi 9 sensiblement cylindrique raccordée par une surface concave 10a une rainure annulaire 12, de section en U, disposée derrière une bride 13 qui s'étend radialement vers l'extérieur et dont le diamètre est légèrement supérieur au diamètre de l'épaulement 14 formé par la surface concave 10 et la face axiale interne de la rainure 12. The annular recess 7 is delimited radially on the outside by a substantially cylindrical wall 9 connected by a surface concave 10a an annular groove 12, of U-section, arranged behind a flange 13 which extends radially outwards and whose diameter is slightly greater than the diameter of the shoulder 14 formed by the concave surface 10 and the inner axial face of the groove 12.

Dans l'exemple montré sur les dessins, la rainure 12 et la bride 13 émergent sur la face 4 du disque 3, mais cette disposition n'est pas obligatoire pour la mise en oeuvre de l'invention.In the example shown in the drawings, the groove 12 and the flange 13 on the face of disk 3, but this provision is not obligatory for the implementation of the invention.

La portion 6 radialement intérieure du flasque 5 présente une base 15 qui s'étend dans l'évidement 7 et qui présente une surface périphérique 15a cylindrique qui est en appui contre la paroi cylindrique 9, ainsi qu'un pied 16 disposé sous la base 15 et qui s'étend radialement vers l'intérieur. Le diamètre de l'alésage 17 du pied 16 est sensiblement égal ou légèrement supérieur au diamètre de la bride 13, afin de permettre l'introduction de la portion 6 radialement intérieure du flasque 5 dans l'évidement 7 lors du montage, ou son extraction pour des besoins de réparation ou d'entretien des aubes 3. La face 18 externe du pied 16 est disposée dans un plan radial passant dans la rainure 12 au voisinage de l'épaulement 14. Cette face 18 se raccorde à la face radialement intérieure de la base 15, et forme avec cette dernière une feuillure 19.The radially inner portion 6 of the flange 5 has a base 15 which extends into the recess 7 and which has a surface cylindrical peripheral 15a which bears against the cylindrical wall 9, and a foot 16 disposed under the base 15 and which extends radially towards inside. The diameter of the bore 17 of the foot 16 is substantially equal or slightly greater than the diameter of the flange 13, in order to allow introducing the radially inner portion 6 of the flange 5 into the recess 7 during assembly, or its extraction for the needs of repair or maintenance of the blades 3. The outer face 18 of the foot 16 is disposed in a radial plane passing through the groove 12 in the vicinity of the shoulder 14. This face 18 is connected to the radially inner face of the base 15, and forms with the latter a rabbet 19.

Dans cette feuillure 19 loge la portion radialement extérieure du jonc 8, dont la portion radialement intérieure loge en partie dans la rainure 12.In this rabbet 19 houses the radially outer portion of the 8, the radially inner portion of which is partly groove 12.

Le jonc 8 présente deux faces axiales parallèles perpendiculaires à l'axe de rotation du disque 1, à savoir une face axiale externe 20 en appui contre la face interne de la bride 13 et une face axiale interne 21 en appui contre la face externe 18 du pied 16 et sa surface périphérique 22 est en appui contre la face radialement intérieure de la base 15.The ring 8 has two parallel axial faces perpendicular to the axis of rotation of the disc 1, namely an axial face external 20 bearing against the inner face of the flange 13 and a face internal axial 21 bearing against the outer face 18 of the foot 16 and its peripheral surface 22 bears against the radially inner face from the base 15.

Pour permettre le montage ou le démontage du flasque 5, le jonc 8 est rétracté dans la rainure 12 au moyen d'outils de compression. Comme on le voit clairement sur la figure 1, la bride 13 et la périphérie du jonc 8 présentent en correspondance une pluralité d'encoches 30a sur la bride 13 et 30b sur le jonc 8, dans lesquelles on positionne les griffes 25 des outils de compression, ces griffes étant dimensionnées de telle manière que, lorsque le jonc 8 est rétracté, les paroi délimitant les paires d'encoches 30a et 30b étant alignées, les griffes 25 s'escamotent dans le diamètre ou le contour de la bride 13 et sont alors positionnées dans le cylindre géométrique défini par l'alésage 17 du pied 16.To allow the assembly or the disassembly of the flange 5, the 8 is retracted into the groove 12 by means of compression tools. As can be seen clearly in FIG. 1, the flange 13 and the periphery of the 8 have correspondingly a plurality of notches 30a on the flange 13 and 30b on the rod 8, in which the claws are positioned 25 compression tools, these claws being dimensioned such way that, when the rod 8 is retracted, the walls defining the pairs with notches 30a and 30b being aligned, the claws 25 retract into the diameter or the contour of the flange 13 and are then positioned in the geometric cylinder defined by the bore 17 of the foot 16.

La profondeur de la rainure 7 est calculée pour permettre l'escamotage des griffes 25, lors de la compression du jonc 8. The depth of the groove 7 is calculated to allow the retraction of the claws 25, during the compression of the rod 8.

Avant de mettre en place le flasque 5, on introduit le jonc 8 dans l'évidement 7, sa partie radialement intérieure étant de préférence dans la rainure 12, ainsi que cela est montré sur la figure 3. Les griffes 25 de l'outil de compression sont écartées vers l'extérieur et on les dispose dans les encoches 30b du jonc 8. On rapproche les griffes 25 vers l'axe de rotation du disque 1 par serrage, ce qui comprime le jonc 8 qui s'escamote dans la rainure 7.Before setting up the flange 5, we introduce the ring 8 in the recess 7, its radially inner part being preferably in the groove 12, as shown in Figure 3. The claws 25 of the compression tool are spread outward and are available in the notches 30b of the ring 8. The claws 25 are brought closer to the axis of rotation of the disk 1 by clamping, which compresses the ring 8 which retracts in the groove 7.

Lorsque les griffes 25 sont en appui contre les encoches 30a de la bride 13, comme cela est montré sur la figure 4, on rapproche le flasque 5 du disque 1 et on fait passer le pied 16 au-dessus de la bride 13, du jonc 8 et des griffes 25. On plaque alors le flasque 5 contre la face axiale 4, en appliquant sur lui une pression axiale F puis on retire les griffes 25, comme cela est représenté par une flèche sur la figure 5. Le jonc 8 s'expanse alors et sa périphérie 22 vient en appui contre la base 15. On supprime la pression axiale F exercée sur le flasque 5, et le jonc 8 est alors comprimé entre le pied 16 et la bride 13, ainsi que cela est montré sur la figure 6. Le démontage du flasque 5 se fait selon le processus inverse.When the claws 25 bear against the notches 30a of the flange 13, as shown in FIG. 4, the flange 5 of the disk 1 and the foot 16 is passed over the flange 13, of the ring 8 and claws 25. Then plate 5 flange against the face axial axis 4, by applying axial pressure F to it and then removing the claws 25, as shown by an arrow in FIG. ring 8 then expands and its periphery 22 bears against the base 15. It suppresses the axial pressure F exerted on the flange 5, and the rod 8 is then compressed between the foot 16 and the flange 13, as this is shown in Figure 6. The disassembly of the flange 5 is done according to the reverse process.

Le diamètre de l'épaulement 14 peut être égal au diamètre de la bride 13. Mais avantageusement, le diamètre de l'épaulement 14 est au plus égal au diamètre du fond des encoches 30a de la bride 13. Cette disposition permet aux griffes 25 de s'étendre au-dessus de l'épaulement 14, lors de la compression du jonc 8 sans gêner le montage du flasque 5.The diameter of the shoulder 14 may be equal to the diameter of the flange 13. But advantageously, the diameter of the shoulder 14 is at more equal to the diameter of the bottom of the notches 30a of the flange 13. This arrangement allows the claws 25 to extend above the shoulder 14, during the compression of the rod 8 without interfering with the mounting of the flange 5.

Le diamètre intérieur du jonc 8, non soumis à des contraintes, est de préférence inférieur au diamètre de l'épaulement 14, afin que le jonc 8 soit correctement positionné par rapport à la rainure lors de la mise en place des griffes 25 dans les encoches 30b du jonc 8.The inner diameter of the rod 8, not subject to constraints, is preferably smaller than the diameter of the shoulder 14, so that the 8 is correctly positioned with respect to the groove when setting in place of the claws 25 in the notches 30b of the ring 8.

Lorsque la rainure 7 émerge sur la face 4 du disque 1, la mise en place du jonc 8 sur le disque 8 est plus aisée.When the groove 7 emerges on the face 4 of the disc 1, the setting in place of the ring 8 on the disc 8 is easier.

Le jonc 8, qui se présente sous la forme d'une rondelle fendue, est facile à fabriquer et peu coûteux. En outre, le volume de l'évidement 7 peut être limité au maximum, ce qui renforce la périphérie du disque 1 qui, en général, est soumise à des forces centrifuges considérables.The rod 8, which is in the form of a split washer, is easy to manufacture and inexpensive. In addition, the volume of the recess 7 can be limited to the maximum, which reinforces the periphery of the disc 1 which, in general, is subject to considerable centrifugal forces.

Claims (7)

Dispositif pour retenir un flasque annulaire (5) contre une face radiale (4) d'un disque de rotor (1), ledit disque présentant dans ladite face radiale un évidement annulaire (7) délimité par plusieurs parois dont l'une est formée par la face interne d'une bride (13) qui s'étend radialement vers l'extérieur, et ledit flasque (5) présentant, dans sa partie radialement intérieure, une base annulaire (15) en appui contre la paroi radialement extérieure (9) de l'évidement (7) et un pied (16) qui s'étend radialement vers l'intérieur dans l'évidement (7) à partir de la base (15), ledit dispositif comportant une bague de retenue annulaire fendue disposée dans l'évidement (7), cette bague ayant une première surface radiale en appui contre la face interne de la bride, une deuxième surface radiale en appui contre la face axialement externe du pied et une surface périphérique en butée contre ledit pied ou ladite base,
   caractérisé par le fait que la bague est constituée par un jonc (8) interposé axialement entre le pied (16) du flasque (5) et la bride (13), et dont la surface périphérique (22) est en butée contre la base (15), ladite surface périphérique (22) et ladite bride (13) comportant en correspondance des encoches (30a, 30b) débouchant radialement vers l'extérieur et destinées à recevoir des outils de compression (25) dudit jonc (8), qui s'escamotent dans le contour de ladite bride (13) lors du montage ou du démontage dudit flasque (5).Device for retaining an annular flange (5) against a radial face (4) of a rotor disk (1), said disk having in said radial face an annular recess (7) delimited by a plurality of walls, one of which is formed by the inner face of a flange (13) which extends radially outwards, and said flange (5) having, in its radially inner portion, an annular base (15) bearing against the radially outer wall (9) of the recess (7) and a foot (16) extending radially inwards into the recess (7) from the base (15), said device having a split annular retaining ring disposed in the recess (7), this ring having a first radial surface bearing against the inner face of the flange, a second radial surface bearing against the axially outer face of the foot and a peripheral surface abutting against said foot or said base,
characterized in that the ring is constituted by a rod (8) interposed axially between the foot (16) of the flange (5) and the flange (13), and whose peripheral surface (22) abuts against the base ( 15), said peripheral surface (22) and said flange (13) having in correspondence notches (30a, 30b) opening radially outwardly and intended to receive compression tools (25) of said rod (8), which are retract into the contour of said flange (13) during assembly or disassembly of said flange (5). Dispositif selon la revendication 1, caractérisé par le fait que la portion radialement intérieure du jonc (8) loge dans une rainure (12) ménagée derrière la bride (13).Device according to claim 1, characterized in that the radially inner portion of the rod (8) accommodates in a groove (12) formed behind the flange (13). Dispositif selon la revendication 2, caractérisé par le fait que la rainure (12) a une section en U.Device according to claim 2, characterized in that the groove (12) has a U-section. Dispositif selon l'une des revendications 2 ou 3, caractérisé par le fait que le diamètre de l'épaulement (14) formé par la rainure (12) et la paroi (10) de la cavité (7) a un diamètre au plus égal au diamètre de la bride (13).Device according to one of claims 2 or 3, characterized in that the diameter of the shoulder (14) formed by the groove (12) and the wall (10) of the cavity (7) has a diameter at most equal to the diameter of the flange (13). Dispositif selon la revendication 4, caractérisé par le fait que le diamètre de l'épaulement (14) est au plus égal au diamètre du fond des encoches (30a) de la bride (13). Device according to claim 4, characterized in that the diameter of the shoulder (14) is at most equal to the bottom diameter of the notches (30a) of the flange (13). Dispositif selon l'une quelconque des revendications 2 à 5, caractérisé par le fait que le jonc (8) présente des faces radiales opposées planes, et l'épaisseur du jonc (8) est au plus égale à la largeur de la rainure (7).Device according to any one of claims 2 to 5, characterized in that the rod (8) has opposite planar radial faces, and the thickness of the rod (8) is at most equal to the width of the groove (7). ). Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé par le fait que le pied (16) du flasque (5) présente un alésage (17) dont le diamètre est sensiblement égal au diamètre de la bride (13).Device according to any one of claims 1 to 6, characterized in that the foot (16) of the flange (5) has a bore (17) whose diameter is substantially equal to the diameter of the flange (13).
EP04291803.7A 2003-07-17 2004-07-15 Rotor disk comprising an annular flange Active EP1498579B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308713A FR2857691B1 (en) 2003-07-17 2003-07-17 RETENTION OF ROTOR FLASK
FR0308713 2003-07-17

Publications (2)

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EP1498579A1 true EP1498579A1 (en) 2005-01-19
EP1498579B1 EP1498579B1 (en) 2015-12-02

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EP04291803.7A Active EP1498579B1 (en) 2003-07-17 2004-07-15 Rotor disk comprising an annular flange

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US (1) US7217100B2 (en)
EP (1) EP1498579B1 (en)
JP (1) JP4181528B2 (en)
CA (1) CA2475043C (en)
FR (1) FR2857691B1 (en)
RU (1) RU2340799C2 (en)
UA (1) UA82660C2 (en)

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FR2899636A1 (en) * 2006-04-10 2007-10-12 Snecma Sa AXIAL RETENTION DEVICE FOR A TURBOMACHINE ROTOR DISC FLASK
EP1956194A1 (en) * 2007-02-06 2008-08-13 Siemens Aktiengesellschaft Turbine assembly comprising a securing member and process of securing a side plate
EP2009244A1 (en) 2007-06-27 2008-12-31 Snecma Device for axial retention of vanes mounted on a turbomachine rotor disc
WO2010049196A1 (en) * 2008-10-30 2010-05-06 Siemens Aktiengesellschaft Gas turbine having sealing plates on the turbine disc
FR2939834A1 (en) * 2008-12-17 2010-06-18 Turbomeca TURBINE WHEEL WITH AXIAL RETENTION SYSTEM OF AUBES
EP2514923A1 (en) * 2011-04-18 2012-10-24 MTU Aero Engines GmbH Screen device, integrated bladed rotor base body, method and fluid flow engine
WO2014137435A3 (en) * 2013-03-05 2014-11-13 Rolls-Royce North American Technologies, Inc. Turbine segmented cover plate retention method
GB2518945A (en) * 2013-07-30 2015-04-08 Snecma A device for guiding variable pitch diffuser vanes of a turbine engine
FR3026430A1 (en) * 2014-09-29 2016-04-01 Snecma TURBINE WHEEL IN A TURBOMACHINE
FR3091719A1 (en) * 2019-01-15 2020-07-17 Safran Aircraft Engines rotor disc sealing flange area
FR3108669A1 (en) * 2020-03-25 2021-10-01 Safran Aircraft Engines BLADDER WHEEL OF AN AIRCRAFT TURBINE, TURBINE INCLUDING SUCH A BLADE WHEEL AND METHOD OF MOUNTING SUCH A BLADE WHEEL

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FR2893093B1 (en) * 2005-11-08 2008-02-08 Snecma Sa MOUNTING A COMPOSITE RING ON A ROTOR DISC OF A TURBOMACHINE.
US8643244B2 (en) 2011-07-25 2014-02-04 Hamilton Sundstrand Corporation Strength cast rotor for an induction motor
FR2982635B1 (en) * 2011-11-15 2013-11-15 Snecma AUBES WHEEL FOR A TURBOMACHINE
RU2493371C1 (en) * 2012-05-11 2013-09-20 Открытое акционерное общество "Авиадвигатель" Turbojet turbine rotor
US9228443B2 (en) * 2012-10-31 2016-01-05 Solar Turbines Incorporated Turbine rotor assembly
US9453422B2 (en) * 2013-03-08 2016-09-27 General Electric Company Device, system and method for preventing leakage in a turbine
FR3020408B1 (en) * 2014-04-24 2018-04-06 Safran Aircraft Engines ROTARY ASSEMBLY FOR TURBOMACHINE
US10215037B2 (en) * 2016-05-13 2019-02-26 United Technologies Corporation Contoured retaining ring
US10502061B2 (en) 2016-09-28 2019-12-10 Pratt & Whitney Canada Corp. Damper groove with strain derivative amplifying pockets
FR3092609B1 (en) * 2019-02-12 2021-02-12 Safran Aircraft Engines TURBINE ASSEMBLY FOR AIRCRAFT TURBOMACHINE WITH IMPROVED DISC COOLING CIRCUIT
US11525464B2 (en) 2021-03-23 2022-12-13 Pratt & Whitney Canada Corp. Rotor with centrifugally wedged damper
US11391157B1 (en) 2021-03-23 2022-07-19 Pratt & Whitney Canada Corp. Damped rotor assembly

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Cited By (24)

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Publication number Priority date Publication date Assignee Title
EP1845235A1 (en) 2006-04-10 2007-10-17 Snecma Device for axial retention of a turbomachine rotor disc cover plate
FR2899636A1 (en) * 2006-04-10 2007-10-12 Snecma Sa AXIAL RETENTION DEVICE FOR A TURBOMACHINE ROTOR DISC FLASK
US7857593B2 (en) 2006-04-10 2010-12-28 Snecma Retaining device for axially retaining a rotor disk flange in a turbomachine
EP1956194A1 (en) * 2007-02-06 2008-08-13 Siemens Aktiengesellschaft Turbine assembly comprising a securing member and process of securing a side plate
US8348620B2 (en) 2007-06-27 2013-01-08 Snecma Device for axially retaining blades mounted on a turbomachine rotor disk
EP2009244A1 (en) 2007-06-27 2008-12-31 Snecma Device for axial retention of vanes mounted on a turbomachine rotor disc
FR2918106A1 (en) * 2007-06-27 2009-01-02 Snecma Sa AXIS RETAINING DEVICE OF AUBES MOUNTED ON A TURBOMACHINE ROTOR DISC.
WO2010049196A1 (en) * 2008-10-30 2010-05-06 Siemens Aktiengesellschaft Gas turbine having sealing plates on the turbine disc
CN102203389B (en) * 2008-10-30 2014-03-05 西门子公司 Gas turbine having sealing plates on turbine disc
CN102203389A (en) * 2008-10-30 2011-09-28 西门子公司 Gas turbine having sealing plates on the turbine disc
US8573943B2 (en) 2008-10-30 2013-11-05 Siemens Aktiengesellschaft Gas turbine having sealing plates on the turbine disc
FR2939834A1 (en) * 2008-12-17 2010-06-18 Turbomeca TURBINE WHEEL WITH AXIAL RETENTION SYSTEM OF AUBES
WO2010076493A1 (en) * 2008-12-17 2010-07-08 Turbomeca Turbine wheel with an axial retention system for vanes
US8721293B2 (en) 2008-12-17 2014-05-13 Turbomeca Turbine wheel with an axial retention system for vanes
EP2514923A1 (en) * 2011-04-18 2012-10-24 MTU Aero Engines GmbH Screen device, integrated bladed rotor base body, method and fluid flow engine
WO2014137435A3 (en) * 2013-03-05 2014-11-13 Rolls-Royce North American Technologies, Inc. Turbine segmented cover plate retention method
US9803485B2 (en) 2013-03-05 2017-10-31 Rolls-Royce North American Technologies, Inc. Turbine segmented cover plate retention method
GB2518945A (en) * 2013-07-30 2015-04-08 Snecma A device for guiding variable pitch diffuser vanes of a turbine engine
GB2518945B (en) * 2013-07-30 2020-04-08 Snecma A device for guiding variable pitch diffuser vanes of a turbine engine
FR3026430A1 (en) * 2014-09-29 2016-04-01 Snecma TURBINE WHEEL IN A TURBOMACHINE
US9890652B2 (en) 2014-09-29 2018-02-13 Snecma Turbine wheel for a turbine engine
FR3091719A1 (en) * 2019-01-15 2020-07-17 Safran Aircraft Engines rotor disc sealing flange area
US11365643B2 (en) 2019-01-15 2022-06-21 Safran Aircraft Engines Rotor disc sealing flange sector
FR3108669A1 (en) * 2020-03-25 2021-10-01 Safran Aircraft Engines BLADDER WHEEL OF AN AIRCRAFT TURBINE, TURBINE INCLUDING SUCH A BLADE WHEEL AND METHOD OF MOUNTING SUCH A BLADE WHEEL

Also Published As

Publication number Publication date
RU2340799C2 (en) 2008-12-10
US7217100B2 (en) 2007-05-15
UA82660C2 (en) 2008-05-12
FR2857691B1 (en) 2006-02-03
FR2857691A1 (en) 2005-01-21
EP1498579B1 (en) 2015-12-02
US20050042108A1 (en) 2005-02-24
JP2005036811A (en) 2005-02-10
CA2475043A1 (en) 2005-01-17
RU2004122000A (en) 2006-01-27
JP4181528B2 (en) 2008-11-19
CA2475043C (en) 2011-09-27

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