EP3105011A1 - System for clamping a part and method for sealing the inner casing of a low-pressure rectifier of a turbomachine - Google Patents

System for clamping a part and method for sealing the inner casing of a low-pressure rectifier of a turbomachine

Info

Publication number
EP3105011A1
EP3105011A1 EP15706915.4A EP15706915A EP3105011A1 EP 3105011 A1 EP3105011 A1 EP 3105011A1 EP 15706915 A EP15706915 A EP 15706915A EP 3105011 A1 EP3105011 A1 EP 3105011A1
Authority
EP
European Patent Office
Prior art keywords
clamping
pneumatic
hydraulic
sealing
jack
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
EP15706915.4A
Other languages
German (de)
French (fr)
Other versions
EP3105011B1 (en
Inventor
Romain René Marcel CHARDONNET
Jean-Yves François Henri MAILLET
Erwan SOUBIGOU
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
Safran Aircraft Engines SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Safran Aircraft Engines SAS filed Critical Safran Aircraft Engines SAS
Publication of EP3105011A1 publication Critical patent/EP3105011A1/en
Application granted granted Critical
Publication of EP3105011B1 publication Critical patent/EP3105011B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/14—Clamps for work of special profile
    • 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
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • 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
    • F01D5/005—Repairing methods or devices
    • 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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • 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
    • F05D2230/30—Manufacture with deposition of material
    • 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
    • F05D2300/516—Surface roughness

Definitions

  • the present invention relates generally to the clamping of workpieces.
  • Such a system comprises for example a holding pad which forms a first jaw and which is coupled to a clamping screw. Said clamping screw passes through said pad and is engaged in a reference support with respect to which it is desired to position the part during the intervention.
  • Such a manual system has the disadvantage of not allowing a uniform clamping of a flange to another and require long setting times.
  • the force exerted on the part is not repetitive and can be highly variable from one operator to another.
  • Clamping is done by hydraulic or pneumatic compression.
  • Control and monitoring of the clamping pressure is also complex.
  • rectifier must be rotated.
  • a clamping by pneumatic or hydraulic energy would require to be able to accompany this rotation by winding the pipes of the hydraulic or pneumatic supply, which is particularly complex to organize.
  • the center of the rectifier can not be used to pass such pipes since it is used for other functions in these operations.
  • An object of the invention is to solve the problems of the state of the art and to propose a system that does not have the aforementioned drawbacks.
  • the invention proposes a clamping system comprising a clamping jaw mounted on the axis of a pneumatic or hydraulic jack, wherein said jack is of a structure which, when the supply of said jack in pneumatic or hydraulic energy is cut off, drives the clamping jaw towards its clamping position, supplying said jack with pneumatic or hydraulic energy opposing said clamping, characterized in that it comprises locking means of the jack when the clamping jaw is in the released position.
  • the proposed clamping system keeps the workpiece clamped when the pneumatic supply is cut off. This eliminates various needs for power, energy storage, etc.
  • the clamping is made repetitive, regardless of the flange.
  • the invention also proposes a method for sealing and / or injecting abradable onto the inner shell of a low-pressure turbomachine rectifier, characterized in that it comprises the following steps:
  • a tool for sealing and / or injecting abradable on the inner shell of a low-pressure turbomachine rectifier characterized in that it comprises an intervention bench and at least one flange comprising such a system. clamping.
  • FIG. 1 shows schematically in perspective a low-pressure turbomachine rectifier
  • FIG. 2 schematically illustrates the principle of an energized positive clamping system according to a possible embodiment of the invention
  • FIG. 3 illustrates in perspective an exemplary embodiment for the clamping system of FIG. 2;
  • FIG. 4 illustrates an example of use for clamping the inner ferrule or the outer shell of a low-pressure turbomachine rectifier.
  • the rectifier R illustrated in FIG. 1 comprises an inner ferrule VI, an outer ferrule VE and blades A assembled by welding to the outer ferrule VE.
  • These blades A are integral with the inner ring VI through an abradable surface AB.
  • this abradable surface is performed during sealing and injection operations requiring clamping of the outer shell VE and the inner ring VI on a support structure of a response bench.
  • the inner ferrule VI and outer ferrule VE are held at several points by means of reference flanges.
  • Such a clamping system is a system comprising one or more springs 2 exerting on the piston 3 of a jack 4 a force which is used to perform said clamping.
  • a hydraulic / pneumatic circuit 10 is provided, but only to ensure the loosening of the clamping system 1, no power supply being necessary for clamping.
  • one or more spring (s) 2 is (are) compressed (s) between the piston 3 and the bottom 5a of the body 5 of the cylinder 4.
  • the piston 3 is integral with the axis 6 of the cylinder, which opens out of the body 5.
  • said axis 6 is itself integral with a clamping jaw 7.
  • a cam 8 is provided to lock the clamping jaw 7 and the axis 6 in a disengaged high position (release position).
  • said cam 8 cooperates with a groove 9 that has the axis 6 and in which it is possible to engage said cam 8 when the jaw
  • the positioning of the cam on the cylinder 4 or disengagement is for example made manually.
  • the loosening is obtained by supplying pneumatic energy to the circuit 10 along the arrow E. A force is exerted against the piston 3, which is movable in the direction of the rise along the arrow M inside said body 5 and compresses the springs 2.
  • the displacement of the piston 3 and the axis 6 inside the body 5 of the jack 4 is done in a helical movement to rotate the jaw 7 90 degrees on itself when it moves to the loosening position.
  • a helical movement facilitates the disengagement of the workpiece to be clamped.
  • FIG. 4 illustrates the use of clamping systems of the type of the system 1 which has just been described in order to carry out the positioning of the rings VI and VE of a rectifier R on an intervention bank B.
  • the different reference flanges 1 are first fixed in a precise manner on the bench B by means of the fastening means 11 (FIG. 3) that they comprise, the flanges 1 and the bench B constituting part of the tooling of FIG. intervention.
  • the rectifier R is thus maintained in position on the intervention bench B, the sealing operations are performed on the inner surfaces of the inner shell and in the openings thereof.
  • the sealing is done for example by depositing an RTV silicone. It allows to create a sealing of the track before injection of the abradable material itself.
  • the polymerization of the abradable material is then carried out on openings of the inner ferrule.
  • the unclamping / unlocking of the different flanges 1 is then ensured by putting the different flanges under hydraulic / pneumatic pressure.
  • the reference flanges 1 can then be removed.
  • the cams 8 can be disengaged in order to limit the biasing of the springs 2.
  • the clamping performed is particularly reliable and is not dependent on the level of hydraulic / pneumatic pressure provided by the circuits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)
  • Surgical Instruments (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The invention relates to a clamping system (1) comprising a clamping jaw (7) mounted on the shaft of a pneumatic or hydraulic cylinder (4), wherein said cylinder has a structure which drives the clamping jaw towards its clamping position when the pneumatic or hydraulic energy supply of the cylinder is interrupted, the pneumatic or hydraulic energy supply of the cylinder opposing the clamping, and where means (8) are provided for locking the cylinder when the clamping jaw is in a non-clamped position.

Description

SYSTEME DE BRIDAGE DE PIECE ET PROCEDE D ETANCHAGE DE LA VIROLE INTERIEURE D'UN REDRESSEUR BASSE PRESSION DE  PIECE CLAMPING SYSTEM AND METHOD FOR LOCKING THE INTERNAL VIROL OF A LOW PRESSURE RECTIFIER
TURBOMACHINE  TURBOMACHINE
DOMAINE TECH NIQUE GÉNÉRAL ET ART ANTÉRIEUR La présente invention concerne de façon générale le bridage de pièces. GENERAL TECHNICAL FIELD AND PRIOR ART The present invention relates generally to the clamping of workpieces.
Elle trouve avantageusement application dans le domaine de l'aéronautique pour la mise en œuvre d'opérations d'étanchage et/ou d'injection d'abradable sur des viroles intérieures de redresseurs basse pression de turbomachines.  It finds advantageously application in the field of aeronautics for the implementation of sealing operations and / or injection of abradable on inner rings of low pressure turbomachine rectifiers.
ETAT DE LA TECH NIQUE STATE OF THE TECH NIC
Il est classique de maintenir des pièces dans des positions précises sur des bancs d'intervention grâce à des brides de référence. It is traditional to maintain parts in precise positions on work benches using reference flanges.
On connaît notamment des systèmes de bridage à réglage manuel . Un tel système comporte par exemple un patin de maintien qui forme une première mâchoire et qui est couplé à une vis de serrage. Ladite vis de serrage traverse ledit patin et est engagée dans un support de référence par rapport auquel on souhaite positionner la pièce pendant l'intervention .  In particular known clamping systems with manual adjustment. Such a system comprises for example a holding pad which forms a first jaw and which is coupled to a clamping screw. Said clamping screw passes through said pad and is engaged in a reference support with respect to which it is desired to position the part during the intervention.
Un tel système manuel a l'inconvénient de ne pas permettre un serrage uniforme d'une bride à l'autre et de nécessiter des temps de mise en place longs.  Such a manual system has the disadvantage of not allowing a uniform clamping of a flange to another and require long setting times.
Par ailleurs l'effort exercé sur la pièce n'est pas répétitif et peut être fortement variable d'un opérateur à l'autre.  Moreover, the force exerted on the part is not repetitive and can be highly variable from one operator to another.
On connaît par ailleurs des systèmes de bridage à commande hydraulique ou pneumatique.  Also known clamping systems with hydraulic or pneumatic control.
Le serrage y est réalisé par compression hydraulique ou pneumatique.  Clamping is done by hydraulic or pneumatic compression.
Ceci suppose toutefois de disposer d'un stockage d'énergie hydraulique ou pneumatique important et en particulier de pouvoir disposer de réserves de sécurité pour pallier les cas d'une éventuelle défaillance dans la production de la pression hydraulique ou pneumatique. However, this presupposes having a large hydraulic or pneumatic energy storage and in particular the ability to have safety reserves to mitigate the case of a possible failure in the production of hydraulic or pneumatic pressure.
La gestion de l'énergie et la maintenance de ces systèmes sont onéreuses.  Energy management and maintenance of these systems is expensive.
Le pilotage et la surveillance de la pression de serrage s'avère en outre complexe.  Control and monitoring of the clamping pressure is also complex.
Par ailleurs, ces techniques sont peu adaptées aux opérations d'étanchage et/ou d'injection d'abradable sur des viroles intérieures de redresseur basse pression de turbomachines.  Furthermore, these techniques are poorly adapted to sealing and / or abradable injection operations on domestic shrouds of low pressure turbomachine rectifiers.
Lors de ces opérations en effet, le redresseur doit être mis en rotation. Un bridage par énergie pneumatique ou hydraulique nécessiterait de pouvoir accompagner cette rotation par un enroulement des tuyaux de l'alimentation hydraulique ou pneumatique, ce qui est particulièrement complexe à organiser.  During these operations indeed, the rectifier must be rotated. A clamping by pneumatic or hydraulic energy would require to be able to accompany this rotation by winding the pipes of the hydraulic or pneumatic supply, which is particularly complex to organize.
En particulier, le centre du redresseur ne peut être utilisé pour faire passer de tels tuyaux étant donné qu'il est utilisé pour d'autres fonctions dans ces opérations.  In particular, the center of the rectifier can not be used to pass such pipes since it is used for other functions in these operations.
Parmi les systèmes de bridage à commande hydraulique ou pneumatique, il existe des systèmes pour lesquels la commande déclenche le désengagement du système (document EP 1 310 331 A2).  Among the hydraulically or pneumatically controlled clamping systems, there are systems for which the control triggers the disengagement of the system (document EP 1 310 331 A2).
PRÉSENTATION GÉNÉRALE DE L'INVENTION GENERAL PRESENTATION OF THE INVENTION
Un but de l'invention est de résoudre les problématiques de l'état de la technique et de proposer un système qui ne présente pas les inconvénients précités. An object of the invention is to solve the problems of the state of the art and to propose a system that does not have the aforementioned drawbacks.
Plus particulièrement l'invention propose un système de bridage comportant une mâchoire de bridage montée sur l'axe d'un vérin pneumatique ou hydraulique, dans lequel ledit vérin est d'une structure qui, lorsque l'alimentation dudit vérin en énergie pneumatique ou hydraulique est coupée, entraîne la mâchoire de bridage vers sa position de serrage, l'alimentation dudit vérin en énergie pneumatique ou hydraulique s'opposant audit serrage , caractérisé en ce qu'il comporte des moyens de verrouillage du vérin lorsque la mâchoire de bridage est en position desserrée. More particularly, the invention proposes a clamping system comprising a clamping jaw mounted on the axis of a pneumatic or hydraulic jack, wherein said jack is of a structure which, when the supply of said jack in pneumatic or hydraulic energy is cut off, drives the clamping jaw towards its clamping position, supplying said jack with pneumatic or hydraulic energy opposing said clamping, characterized in that it comprises locking means of the jack when the clamping jaw is in the released position.
Le système de serrage proposé permet de maintenir bridée la pièce lorsque l'on coupe l'alimentation pneumatique. On supprime ainsi les besoins divers d'alimentation, de stockage d'énergie, etc.  The proposed clamping system keeps the workpiece clamped when the pneumatic supply is cut off. This eliminates various needs for power, energy storage, etc.
Le bridage est rendu très fiable et sans risque pour l'opérateur. Clamping is made very reliable and safe for the operator.
En particulier, le serrage est rendu répétitif, quelle que soit la bride. In particular, the clamping is made repetitive, regardless of the flange.
Du fait qu'il est rendu permanent, le système ne nécessite en outre pas ou peu d'opérations de maintenance.  Because it is made permanent, the system also requires no or few maintenance operations.
L'invention propose également un procédé d'étanchage et/ou d'injection d'abradable sur la virole intérieure d'un redresseur basse pression de turbomachine, caractérisé en ce qu'il comporte les étapes suivantes :  The invention also proposes a method for sealing and / or injecting abradable onto the inner shell of a low-pressure turbomachine rectifier, characterized in that it comprises the following steps:
- positionnement sur un banc d'intervention de brides comportant un système de bridage du type précité, positionnement du redresseur sur ledit banc,  positioning on a flange intervention bench comprising a clamping system of the aforementioned type, positioning the rectifier on said bench,
- enlèvement des moyens de verrouillage du vérin situés au niveau de la virole extérieure,  removal of the locking means of the jack located at the outer ring,
- serrage d'au moins une bride par coupure de son alimentation pneumatique ou hydraulique.  - Clamping at least one flange by cutting off its pneumatic or hydraulic supply.
Elle propose en outre un outillage pour étanchage et/ou injection d'abradable sur la virole intérieure d'un redresseur basse pression de turbomachine, caractérisé en ce qu'il comporte un banc d'intervention et au moins une bride comportant un tel système de bridage.  It also proposes a tool for sealing and / or injecting abradable on the inner shell of a low-pressure turbomachine rectifier, characterized in that it comprises an intervention bench and at least one flange comprising such a system. clamping.
PRÉSENTATION DES FIGURES PRESENTATION OF FIGURES
D'autres caractéristiques et avantages de l'invention ressortiront encore de la description qui suit, laquelle est purement illustrative et non limitative, et doit être lue en regard des figures annexées sur lesquelles : Other characteristics and advantages of the invention will emerge from the description which follows, which is purely illustrative and nonlimiting, and should be read with reference to the appended figures in which:
- La figure 1 représente schématiquement en perspective un redresseur basse pression de turbomachine ; - La figure 2 illustre schématiquement le principe d'un système énergisé à serrage positif conforme à un mode de réalisation possible de l'invention ; - Figure 1 shows schematically in perspective a low-pressure turbomachine rectifier; FIG. 2 schematically illustrates the principle of an energized positive clamping system according to a possible embodiment of the invention;
- La figure 3 illustre en perspective un exemple de réalisation pour le système de bridage de la figure 2 ;  FIG. 3 illustrates in perspective an exemplary embodiment for the clamping system of FIG. 2;
- La figure 4 illustre un exemple d'utilisation pour le bridage de la virole intérieure ou de la virole extérieure d'un redresseur basse pression de turbomachine.  - Figure 4 illustrates an example of use for clamping the inner ferrule or the outer shell of a low-pressure turbomachine rectifier.
DESCRIPTION D'UN OU PLUSIEURS MODES DE REALISATION OU DE MISE EN ŒUVRE DESCRIPTION OF ONE OR MORE MODES OF REALIZATION OR IMPLEMENTATION
Le redresseur R illustré sur la figure 1 comporte une virole intérieure VI, une virole extérieure VE et des aubes A assemblées par soudage à la virole extérieure VE. The rectifier R illustrated in FIG. 1 comprises an inner ferrule VI, an outer ferrule VE and blades A assembled by welding to the outer ferrule VE.
Ces aubes A sont solidaires de la virole intérieure VI par le biais d'une surface abradable AB.  These blades A are integral with the inner ring VI through an abradable surface AB.
Le dépôt de cette surface abradable est réalisé lors d'opérations d'étanchage et d'injection nécessitant un bridage de la virole extérieure VE et de la virole intérieure VI sur une structure support d'un banc d'intervention.  The deposition of this abradable surface is performed during sealing and injection operations requiring clamping of the outer shell VE and the inner ring VI on a support structure of a response bench.
À cet effet, la virole intérieure VI et la virole extérieure VE sont maintenues en plusieurs points au moyen de brides de référence.  For this purpose, the inner ferrule VI and outer ferrule VE are held at several points by means of reference flanges.
Pour ce faire, il est proposé d'utiliser des systèmes de bridage à serrage permanent du type du système 1 illustré sur la figure 2.  To do this, it is proposed to use permanent clamping systems of the type of the system 1 illustrated in FIG.
Un tel système de bridage est un système comportant un ou plusieurs ressorts 2 exerçant sur le piston 3 d'un vérin 4 un effort qui est utilisé pour réaliser ledit serrage.  Such a clamping system is a system comprising one or more springs 2 exerting on the piston 3 of a jack 4 a force which is used to perform said clamping.
Un circuit hydraulique / pneumatique 10 est prévu, mais uniquement pour assurer le desserrage du système de bridage 1, aucune alimentation n'étant nécessaire pour le bridage.  A hydraulic / pneumatic circuit 10 is provided, but only to ensure the loosening of the clamping system 1, no power supply being necessary for clamping.
Dans l'exemple schématique illustré sur la figure 2, un ou plusieurs ressort(s) 2 est (sont) comprimé(s) entre le piston 3 et le fond 5a du corps 5 du vérin 4. Le piston 3 est solidaire de l'axe 6 du vérin, lequel débouche du corps 5. À son extrémité opposée au piston 3, ledit axe 6 est lui-même solidaire d'une mâchoire de bridage 7. In the schematic example illustrated in Figure 2, one or more spring (s) 2 is (are) compressed (s) between the piston 3 and the bottom 5a of the body 5 of the cylinder 4. The piston 3 is integral with the axis 6 of the cylinder, which opens out of the body 5. At its end opposite the piston 3, said axis 6 is itself integral with a clamping jaw 7.
Une came 8 est prévue pour bloquer la mâchoire de bridage 7 et l'axe 6 dans une position haute dégagée (position de desserrage). À cet effet, ladite came 8 coopère avec une rainure 9 que présente l'axe 6 et dans laquelle il est possible d'engager ladite came 8 lorsque la mâchoire A cam 8 is provided to lock the clamping jaw 7 and the axis 6 in a disengaged high position (release position). For this purpose, said cam 8 cooperates with a groove 9 that has the axis 6 and in which it is possible to engage said cam 8 when the jaw
7 est en position haute. 7 is in the up position.
La mise en position de la came sur le vérin 4 ou son désengagement sont par exemple réalisés manuellement.  The positioning of the cam on the cylinder 4 or disengagement is for example made manually.
Lorsque la came 8 et la rainure 9 sont désengagées, les ressorts 2 repoussent le piston 3 du vérin 4. Ledit piston 3 se déplace à l'intérieur du corps 5 du vérin 4. La mâchoire 7, qui se déplace avec le piston 3, est mobile dans le sens de la descente suivant la flèche D pour réaliser le serrage de la pièce à brider.  When the cam 8 and the groove 9 are disengaged, the springs 2 push back the piston 3 of the jack 4. Said piston 3 moves inside the body 5 of the jack 4. The jaw 7, which moves with the piston 3, is movable in the direction of the descent along the arrow D to clamp the workpiece to be clamped.
Le desserrage s'obtient par alimentation en énergie pneumatique du circuit 10 suivant la flèche E. Un effort est exercé contre le piston 3, lequel est mobile dans le sens de la montée suivant la flèche M à l'intérieur dudit corps 5 et comprime les ressorts 2.  The loosening is obtained by supplying pneumatic energy to the circuit 10 along the arrow E. A force is exerted against the piston 3, which is movable in the direction of the rise along the arrow M inside said body 5 and compresses the springs 2.
Lorsque l'énergie hydraulique / pneumatique est par contre coupée, les ressorts 2 exercent leur effort de compression, mais la mâchoire 7 reste dans sa position haute de desserrage si la came 8 a été engagée dans la rainure 9.  When the hydraulic / pneumatic power is cut off, the springs 2 exert their compressive force, but the jaw 7 remains in its upper loosening position if the cam 8 has been engaged in the groove 9.
Il peut en outre être prévu que le déplacement du piston 3 et de l'axe 6 à l'intérieur du corps 5 du vérin 4 se fasse selon un mouvement hélicoïdal permettant de faire tourner la mâchoire 7 de 90 degrés sur elle-même lorsqu'elle se déplace vers la position de desserrage. Un tel mouvement hélicoïdal facilite le désengagement de la pièce à brider.  It may further be provided that the displacement of the piston 3 and the axis 6 inside the body 5 of the jack 4 is done in a helical movement to rotate the jaw 7 90 degrees on itself when it moves to the loosening position. Such a helical movement facilitates the disengagement of the workpiece to be clamped.
Par ailleurs, ainsi que représenté sur la figure 3, le corps 5 du vérin Moreover, as shown in FIG. 3, the body 5 of the jack
4 peut être associé à différents moyens 11 (mâchoires de serrage par exemple) qui permettent de fixer le système 1 sur un support donné avec précision. 4 may be associated with different means 11 (clamping jaws for example) which allow to fix the system 1 on a given support with precision.
La figure 4 illustre l'utilisation de systèmes de bridage du type du système 1 qui vient d'être décrit pour réaliser le positionnement des viroles VI et VE d'un redresseur R sur un banc d'intervention B. Les différentes brides de référence 1 sont tout d'abord fixées de façon précise sur le banc B grâce aux moyens de fixation 11 (Figure 3) qu'elles comportent, les brides 1 et le banc B constituant une partie de l'outillage d'intervention. FIG. 4 illustrates the use of clamping systems of the type of the system 1 which has just been described in order to carry out the positioning of the rings VI and VE of a rectifier R on an intervention bank B. The different reference flanges 1 are first fixed in a precise manner on the bench B by means of the fastening means 11 (FIG. 3) that they comprise, the flanges 1 and the bench B constituting part of the tooling of FIG. intervention.
Puis le redresseur R est mis en place sur ledit banc B.  Then the rectifier R is placed on said bench B.
Les cames de blocage des brides 1 de référence situées au niveau de la virole extérieure VE sont ensuite enlevées.  The locking cams of the reference flanges 1 located at the external ferrule VE are then removed.
Ces brides 1 de référence sont alors serrées sur la virole extérieure VE par coupure de la pression pneumatique dans le circuit.  These reference flanges 1 are then tightened on the outer shell VE by cutting off the pneumatic pressure in the circuit.
La virole VE étant ainsi bridée, on procède ensuite au bridage de la virole intérieure VI.  VE ferrule being thus clamped, it then proceeds to clamp the inner ferrule VI.
Le redresseur R étant ainsi maintenu en position sur le banc d'intervention B, les opérations d'étanchage sont réalisées sur les surfaces intérieures de la virole intérieure ainsi que dans les ajours de celle-ci.  The rectifier R is thus maintained in position on the intervention bench B, the sealing operations are performed on the inner surfaces of the inner shell and in the openings thereof.
L'étanchage se fait par exemple par dépôt d'un silicone RTV. Il permet de créer une étanchéité de la piste avant injection de la matière abradable elle-même.  The sealing is done for example by depositing an RTV silicone. It allows to create a sealing of the track before injection of the abradable material itself.
La polymérisation de la matière abradable est ensuite réalisée sur ajours de la virole intérieure.  The polymerization of the abradable material is then carried out on openings of the inner ferrule.
Le débridage/déverrouillage des différentes brides 1 est ensuite assuré en remettant les différentes brides sous pression hydraulique / pneumatique.  The unclamping / unlocking of the different flanges 1 is then ensured by putting the different flanges under hydraulic / pneumatic pressure.
Lorsque les différentes cames 8 sont repositionnées, la pression hydraulique / pneumatique peut à nouveau être coupée.  When the different cams 8 are repositioned, the hydraulic / pneumatic pressure can be cut again.
Les brides de référence 1 peuvent alors être enlevées.  The reference flanges 1 can then be removed.
Lorsque les brides 1 ne sont pas utilisées, les cames 8 peuvent être désengagées afin de limiter la sollicitation des ressorts 2.  When the flanges 1 are not used, the cams 8 can be disengaged in order to limit the biasing of the springs 2.
On comprend que l'énergie ainsi nécessitée pour la réalisation des bridages est faible.  It is understood that the energy thus required for performing the clamping is low.
Par ailleurs, le bridage réalisé est particulièrement fiable et n'est pas dépendant du niveau de la pression hydraulique / pneumatique assurée par les circuits.  Furthermore, the clamping performed is particularly reliable and is not dependent on the level of hydraulic / pneumatic pressure provided by the circuits.
Il est répétitif, le serrage étant le même quel que soit la bride. Il se réalise rapidement et est sans effort pour l'utilisateur réalise le bridage. It is repetitive, the tightening being the same regardless of the flange. It is realized quickly and is effortless for the user realizes the clamping.
Il ne nécessite pas de stockage d'énergie hydraulique pneumatique important.  It does not require significant pneumatic hydraulic energy storage.
Il ne nécessite que très peu de maintenance.  It requires very little maintenance.

Claims

REVENDICATIONS
Système de bridage comportant une mâchoire de bridage montée sur l'axe d'un vérin pneumatique ou hydraulique, dans lequel ledit vérin est d'une structure qui, lorsque l'alimentation dudit vérin en énergie pneumatique ou hydraulique est coupée, entraine la mâchoire de bridage vers sa position de serrage, l'alimentation dudit vérin en énergie pneumatique ou hydraulique s'opposant audit serrage, caractérisé en ce qu'il comporte des moyens de verrouillage du vérin lorsque la mâchoire de bridage est en position desserrée. A clamping system comprising a clamping jaw mounted on the axis of a pneumatic or hydraulic jack, wherein said jack is of a structure which, when the supply of said jack in pneumatic or hydraulic energy is cut, causes the jaw of clamping to its clamping position, the supply of said cylinder in pneumatic or hydraulic energy opposing said clamping, characterized in that it comprises locking means of the cylinder when the clamping jaw is in the released position.
Système de bridage selon la revendication 1, caractérisé en ce que ledit vérin comporte un piston et au moins un ressort de compression qui agit à encontre du piston, la mâchoire de bridage étant liée audit piston et étant déplacée, pour réaliser son serrage, sous l'effort de compression du ou des ressorts. Clamping system according to claim 1, characterized in that said jack comprises a piston and at least one compression spring which acts against the piston, the clamping jaw being connected to said piston and being moved, to achieve its clamping, under compression force of the spring or springs.
Système de bridage selon l'une des revendications 1 à 2, caractérisé en ce que la structure du vérin est adaptée pour que le déplacement de la mâchoire de bridage entre ses positions de serrage et de desserrage se fasse selon un mouvement hélicoïdal . Clamping system according to one of claims 1 to 2, characterized in that the cylinder structure is adapted so that the displacement of the clamping jaw between its clamping and loosening positions is done in a helical motion.
Système de bridage selon la revendication 3, caractérisé en ce que la rotation de la mâchoire de bridage entre les positions de serrage et de desserrage est de 90°. Clamping system according to claim 3, characterized in that the rotation of the clamping jaw between the clamping and unclamping positions is 90 °.
Procédé d'étanchage et/ou d'injection d'abradable sur la virole intérieure d'un redresseur basse pression de turbomachine, caractérisé en ce qu'il comporte les étapes suivantes consistant à : A process for sealing and / or injecting abradable material onto the inner shell of a turbomachine low-pressure rectifier, characterized in that it comprises the following steps:
positionner sur un banc d'intervention de brides comportant un système de bridage selon l'une des revendications précédentes, positionner le redresseur sur ledit banc, position on a flange intervention bench comprising a clamping system according to one of the preceding claims, position the rectifier on said bench,
Enlever les moyens de verrouillage du vérin situés au niveau de la virole extérieure,  Remove the cylinder locking means located at the outer shell,
- serrer au moins une bride par coupure de son alimentation pneumatique ou hydraulique. - tighten at least one flange by cutting off its pneumatic or hydraulic supply.
Procédé selon la revendication 5, caractérisé en ce que l'on réalise le bridage de la virole extérieure, puis le bridage de la virole intérieure. Process according to Claim 5, characterized in that the outer ring is clamped and then the inner ring is clamped.
Procédé selon l'une des revendications 5 ou 6, caractérisé en ce que, après les opérations d'étanchage et/ou de polymérisation, les brides sont déverrouillées par alimentation pneumatique ou hydraulique. Method according to one of claims 5 or 6, characterized in that, after the sealing and / or polymerization operations, the flanges are unlocked by pneumatic or hydraulic supply.
Outillage pour étanchage et/ou injection d'abradable sur la virole intérieure d'un redresseur basse pression de turbomachine, caractérisé en ce qu'il comporte un banc d'intervention et au moins une bride comportant un système de bridage selon l'une des revendications 1 à 4. Tool for sealing and / or injecting abradable on the inner shell of a low-pressure turbomachine rectifier, characterized in that it comprises an intervention bench and at least one flange comprising a clamping system according to one of the Claims 1 to 4.
EP15706915.4A 2014-02-14 2015-02-12 System for clamping a part and method for sealing the inner casing of a low-pressure rectifier of a turbomachine Active EP3105011B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1451204A FR3017556B1 (en) 2014-02-14 2014-02-14 PART CLAMPING SYSTEM AND METHOD FOR SEALING THE INTERNAL VIROL OF A TURBOMACHINE LOW PRESSURE RECTIFIER
PCT/FR2015/050354 WO2015121592A1 (en) 2014-02-14 2015-02-12 System for clamping a part and method for sealing the inner casing of a low-pressure rectifier of a turbomachine

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EP3105011A1 true EP3105011A1 (en) 2016-12-21
EP3105011B1 EP3105011B1 (en) 2018-04-04

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US (1) US10493600B2 (en)
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CN (1) CN106232299B (en)
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CN111376128B (en) * 2020-04-30 2021-10-22 安徽中材新材料科技有限公司 Cylindrical grinding machine

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FR3017556B1 (en) 2016-09-16
BR112016018524B1 (en) 2021-02-02
RU2016136760A3 (en) 2018-10-22
WO2015121592A1 (en) 2015-08-20
US10493600B2 (en) 2019-12-03
EP3105011B1 (en) 2018-04-04
CA2939059C (en) 2021-12-07
CN106232299A (en) 2016-12-14
BR112016018524A2 (en) 2018-05-08
RU2700438C2 (en) 2019-09-17
US20170173762A1 (en) 2017-06-22
CA2939059A1 (en) 2015-08-20
CN106232299B (en) 2019-06-14
RU2016136760A (en) 2018-03-19
FR3017556A1 (en) 2015-08-21

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