EP2323807A1 - Method of polishing bladed disks (blisks) for a turbomachine and polishing device - Google Patents

Method of polishing bladed disks (blisks) for a turbomachine and polishing device

Info

Publication number
EP2323807A1
EP2323807A1 EP09809337A EP09809337A EP2323807A1 EP 2323807 A1 EP2323807 A1 EP 2323807A1 EP 09809337 A EP09809337 A EP 09809337A EP 09809337 A EP09809337 A EP 09809337A EP 2323807 A1 EP2323807 A1 EP 2323807A1
Authority
EP
European Patent Office
Prior art keywords
polishing
disk
support
wheel
longitudinal axis
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
EP09809337A
Other languages
German (de)
French (fr)
Other versions
EP2323807B1 (en
Inventor
Cyrille Baudimont
Jean-François Laurent CHABOT
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 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 SNECMA SAS filed Critical SNECMA SAS
Publication of EP2323807A1 publication Critical patent/EP2323807A1/en
Application granted granted Critical
Publication of EP2323807B1 publication Critical patent/EP2323807B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/003—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor whereby the workpieces are mounted on a holder and are immersed in the abrasive material
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • 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
    • F05D2230/90—Coating; Surface treatment
    • 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
    • F05D2250/60—Structure; Surface texture
    • F05D2250/62—Structure; Surface texture smooth or fine
    • F05D2250/621—Structure; Surface texture smooth or fine polished
    • 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 mainly to a method of polishing disks provided with a blade and comprising an aerodynamic stream for turbomachines, more particularly to a method of polishing centrifugal wheels for a turbomachine compressor and bladed disks, and to a device polishing for the implementation of such a method.
  • Turbomachines conventionally comprise a compressor, a compression chamber and a turbine.
  • the compressor is intended to increase the pressure of the atmospheric air, the combustion chamber mixes the air which is compressed by the compressor with fuel and burns this mixture, and the turbine, placed in the ejected stream, is driven by this very hot air flow. It serves to drive the compressor via the axis of the turbomachine.
  • the compressor comprises rotors, said rotors comprising bladed disks, some of which are called centrifugal spinning wheels, and stators.
  • a centrifugal wheel, designated subsequently wheel has a substantially frustoconical body and blades spread over the entire surface of the body. These blades delimit two by two with the frustoconical body, a stream of air flow in the form of a helix portion.
  • a centrifugal wheel thus has a complex shape.
  • This wheel is, for some applications, cut directly into the mass, for example in a titanium alloy block or nickel. Such a wheel may also be obtained by casting, by rapid prototyping or electrochemically.
  • the surface state of the wheel especially the surface of the frustoconical body forming the bottom of the vein along which the air flows, and that of the blades, are of great importance and a particular care is brought to their realization.
  • Ra is a statistical value and corresponds to the arithmetical average deviation from the mean line; Rt is the maximum height of the peaks).
  • Ra is a statistical value and corresponds to the arithmetical average deviation from the mean line; Rt is the maximum height of the peaks.
  • this roughness value can not be obtained directly by machining, by foundry or by another technique of realization of the wheel. A polishing step is therefore necessary in order to achieve the required surface quality.
  • Polishing can be done manually using abrasive belts. This technique has the advantage of allowing the polishing of parts of complex shapes. However, this polishing is very long, so it is expensive in labor. Moreover, its quality depends entirely on the operator who performs this polishing.
  • Machines such as those described in US Pat. No. 2,547,056 can be used, however they are of very complex structures and do not allow the polishing of pieces of complex shapes.
  • the object of the present invention is achieved by a polishing process using at least one polishing agent in which it is intended to move the wheel, or more generally the disk provided with a blade having blades defining air veins formed of a portion of a helix, in a helical movement whose pitch is close to the pitch of the helix.
  • Two blades of the wheel define a vein of air, this air stream has substantially the profile of a conical propeller portion.
  • the pitch of the helix formed by the air vein is then called the "impeller pitch”. All the air veins delimited by two successive blades have substantially the same profile in a helix.
  • the wheel is moved in translation and in rotation so as to reproduce the portion of the propeller described by the air veins.
  • the rotational and translational speeds are then adapted so that any point of the wheel has a displacement whose trajectory is close to the propeller of the wheel.
  • the movement of the polishing agent with respect to the blading is substantially that of the flow of air between the blades, which improves the performance of the process.
  • the method according to the invention provides for reciprocating movement, the blade is then moved in a first direction of rotation and a first direction of translation, then is moved in a second direction of rotation opposite to the first direction. rotation and in a second direction of translation opposite to the first direction of translation, these two combinations of movement being reproduced alternately.
  • the main subject of the present invention is therefore a method of polishing a disk provided with a blade, the blade comprising a plurality of blades defining in pairs an air stream having substantially a general shape in the form of a portion of a blade.
  • p-pitch helix said disk being immersed in a bed of polishing agent, said method comprising at least: a step A of moving said disk in a first direction of rotation about the longitudinal axis of the disk and in a first direction of translation along said longitudinal axis simultaneously, so that the path of each point of said disk is at least a portion of a helix whose pitch is close to the pitch p of the helix from which the general shape of the veins is derived air.
  • the method according to the invention may also comprise at least: a step B subsequent to step A of displacement in rotation around the longitudinal axis of the disc in a second direction opposite to the first direction and displacement in translation along said longitudinal axis in a second direction opposite to the first direction simultaneously so that all the points of the disc travel respectively the same propellers as in step A but in in the opposite way.
  • steps A and B are repeated alternately.
  • the rotational speed of the impeller and the speed of translation of the impeller are advantageously connected by a coefficient of proportionality calculated as a function of the tangent of the helical portion from which the general shape of the air streams originates.
  • the method according to the invention may comprise a step C, prior to step A, of determining the static pressure to be applied to the disk and setting up a quantity of polishing agent given as a function of the static pressure determined. previously above said disk.
  • the polishing agent may consist of solid abrasive particles of shapes suitable for circulation between the rotor blades.
  • the polishing agent may be mixed with water, with an acid adapted to the material to be polished or mixed with a medium so as to form a paste.
  • the polishing process advantageously applies to centrifugal wheels for a turbomachine compressor.
  • the present invention also relates to a polishing device comprising a tank intended to be filled with a polishing agent, a disk support provided with a blade, one blade comprising a plurality of vanes defining in pairs an air stream having substantially a general shape in the form of a helix portion p step, and drive means capable of rotating the support about its longitudinal axis and in translation along said longitudinal axis simultaneously, the drive means being programmed so as to go through each point of the support at minus a portion of a helix whose pitch is close to the pitch p of the helix from which the general shape of the air veins of the disk to be polished results.
  • the support may comprise a shaft of longitudinal axis on which the disk to be polished is intended to be fixed coaxially and in which the tank has a bottom provided with an opening through which said support shaft, the device also comprising means sealing between the bottom of the tank and the disc.
  • the sealing means advantageously comprise a tube capable of sliding in said opening in the longitudinal direction in a sealed manner, a plate on which the disk is intended to be mounted, said plate being fixed on a longitudinal end of the tube penetrating into the tank, said tube having an outer diameter substantially equal to the outer diameter of the portion of the disc resting on the tube and the diameter of the opening in the tank.
  • the face of the plate intended to be in contact with the disc comprises an annular groove receiving a seal intended to come into contact with the disc and to prevent penetration of the polishing agent between the disc and the plate.
  • the device according to the invention may comprise means for holding the disk on the support, said disk being intended to be held by clamping between a plate fixed on a free end of the support shaft and the plate.
  • the device according to the invention advantageously comprises a seal between the tank and the tube, of the O-ring or lip seal type.
  • the diameter of the tube is substantially equal to the diameter of the disk on the side of its trailing edge.
  • the drive means comprise, for example a first motor for driving the support in rotation about its longitudinal axis and a second motor for driving the support in translation along said longitudinal axis, the first motor being adapted to drive the support. in rotation in a first direction and in a second direction opposite to the first direction alternately, and the second motor being able to drive the support in translation in a first direction of translation and in a second direction of translation opposite to the first direction so as to alternative.
  • the polishing device according to the invention is advantageously used to polish a turbomachine compressor centrifugal wheel.
  • FIG. 1 is a perspective view of a centrifugal impeller to which the invention can be applied
  • FIG. a schematic representation in section of a polishing device according to the present invention, the wheel being in place
  • Figure 3 is a representation of the polishing device of Figure 2, the polishing device being in a different state, the wheel being in place.
  • FIG 1 there can be seen an example of compressor centrifugal wheel 2 to which the invention applies.
  • a centrifugal wheel is a part movable in rotation about the longitudinal axis of the turbomachine and is driven by the turbine.
  • the wheel 2 comprises a flange 3 of substantially annular shape of axis X.
  • the flange 3 comprises, at a first longitudinal end, a large base 3.1 of larger diameter and, at a second longitudinal end, a small base 3.2 of smaller diameter, the largest diameter and the smallest diameter being connected by a concave annular surface 4 called vein.
  • the wheel 2 also comprises blades 6 projecting from the concave annular surface 4.
  • the blades 6 are distributed over the entire outer periphery of the flange 3 in a regular manner, and extend from the small base 3.2 of the flange to the large base 3.1 flange 3, and are connected to the flange by spokes.
  • the ends 6.1 of the blades on the side of the small base 3.2 form the leading edges and the ends of the side of the large base 3.1 form the trailing edges.
  • Each blade 6 has, seen from above, approximately the shape of a helix portion. All blades are substantially identical and therefore from the same portion of pitch helix p. The blades delimit two by two air veins in which the air to be compressed flows from the leading edge to the trailing edge. The air streams therefore have a generally helical portion-like profile substantially identical to that of the blades 6.
  • the wheel may be made by machining a metal block, for example titanium. At the end of the machining step, the surface of the impeller is faceted and is unacceptable in the state. It can also be produced directly by casting, rapid prototyping or electrochemical process. This wheel then undergoes in a known manner a polishing step.
  • the present invention provides a simple polishing method of implementation and a robust polishing device of such a wheel, also providing improved aerodynamic properties to the wheel.
  • FIGS 2 and 3 we can see an embodiment of a polishing device according to the present invention comprising a tank 8 for containing a polishing agent.
  • the wheel 2 is shown schematically.
  • the polishing agent is formed at least in part by abrasive solid particles.
  • the polishing agent may be contained in a paste or mixed with a fluid, such as water.
  • the particles forming the polishing agent may be formed of alumina, silicon carbide, boron carbide, etc. This list is not exhaustive, the material of the particles being chosen as a function of the material of the part to be polished. The size of these particles is also chosen according to the surface state to be achieved. It can be expected to associate the abrasive particles with a chemical abrasive, such as an acid.
  • the polishing device also comprises a mobile support 10 able to move the wheel 2 in rotation about an axis X 1 and in translation along the axis X 1 in the tank 8.
  • the displacement of the support in the tank is controlled so that any point thereof moves in a helix of not identical, or at least close to the pitch p of the one from which the blades of the wheel are derived.
  • the polishing device comprises drive means (not shown) of the support intended to simultaneously apply to the support 10 a rotational movement and a translational movement, each movement having a determined speed so as to reproduce the pitch p of the propeller.
  • the drive means are able to move the support 10 so that any point thereof traverses a given pitch helix in a direction, for example from the bottom upwards, then travels the same helix in a direction opposite, that is, from top to bottom.
  • the support is reciprocated, and moves up and down alternately.
  • the polishing agent between the blades 6 is then reciprocated with respect to the helical impeller and not p. This back-and-forth movement also allows for a more compact device since the displacement travel of the disc can be reduced.
  • the drive means can move the carrier 10 on less than one helix pitch, one helix pitch or more than one helix pitch. Therefore, by fixing a wheel 2 on the support so that the axis X of the wheel 2 is coaxial with the axis Xl of rotation of the support, the polishing agent will move between the blades 6 substantially reproducing the lines of current in the veins of air. So the polishing is done so directional and improves the aerodynamic performance of the wheel 2.
  • the device as shown has an opening 11 in the bottom of the tank 8 for the passage of the support 10.
  • the support 10 is formed of a shaft 12 of axis X1 around which the wheel 2 is mounted, driven by the drive means.
  • the support 10 comprises means for fixedly securing the impeller 2 on a free end (not visible) of the shaft 12 located in the tank 8.
  • These securing means are, for example formed by a clamping system sandwiching a central portion of the wheel 2 does not require polishing by the device according to the invention.
  • a plate 14, closing the central bore of the wheel 2, is provided and is part of the clamping system.
  • the plate 14 is for example maintained by means of a bolt screwed into the shaft 12.
  • a seal is also provided between the support 10 and the tank 8, more particularly between the support 10 and the opening 11.
  • the rod 12 is surmounted by a plate 19 serving to support the wheel 2, on which the large base 3.1 of the wheel.
  • a tube 16 of outside diameter substantially equal to the outer diameter of the flywheel side edge is fixed, by a longitudinal end 16.1, on the plate 19, for example by means of a weld, the plate 19 then forms the bottom of the tube 16
  • the diameter of the opening 11 is substantially equal to the outside diameter of the tube 16 to ensure contact sliding between the tube 16 and the periphery of the opening 11.
  • the plate 19 comprises at its outer periphery an annular groove in which a seal 21 is disposed. This seal 21 seals between the plate 19 and the wheel 2 to prevent particles or fluid, for example an acid, to be inserted between the wheel and the plate.
  • the tube 16 is able to move at least in translation along the axis Xl to follow the wheel 2 and stay in contact therewith.
  • a seal 17, of O-ring or lip seal type, is also provided to confirm the seal between the tube 16 and the bottom of the tank 8.
  • the wheel rests directly on the longitudinal end 16.1 of the tube 16, 1 'sealing between the tube 16 and the wheel 2 is then obtained by a simple metal / metal contact or by a seal additional.
  • the tube 16 is immobile with respect to the wheel 2, ie it moves in a movement identical to that of the wheel 2 in order to avoid any relative displacement between the tube 16 and the wheel 2, thus improving the seal between the tube 16 and the wheel 2 and avoids wear of the tube 16 and / or the wheel 2.
  • the wheel 2 is immersed in a bed of polishing agent (not shown).
  • the abrasive particles are disposed above the surface to be polished, the static pressure of the abrasive particles on the impeller 2 is therefore directly proportional to the height of the particles above the impeller 2, which corresponds to the distance average immersion of the wheel 2 in the tank 8.
  • the abrasive particles are such that they behave like a fluid.
  • the relative velocity between the polishing agent and the impeller depends directly on the rotational speed of the impeller 2, so is the speed of movement of the carrier 10. Therefore, it is it is possible to vary the polishing time of the wheel 2 by varying the speed of movement of the support 10.
  • the drive means comprise a first motor for rotating the support and a second motor for translating the support 10 along the X axis.
  • the speed of movement of the particles relative to the wheel may be between 2 m / min and 20 m / min; the polishing time can then be understood between 10 min and 5 hours. It should be noted that these are estimated speeds.
  • the parameters are adjusted after experimentation by finding the best compromise between the processing time, the preservation of the workpiece and the roughness criterion Ra obtained.
  • the translational and rotational speeds are connected by a coefficient of proportionality which is obtained from the value of the tangent of the impeller of the impeller.
  • the speeds of rotation and translation therefore vary during the movement since the tangent of the helix varies, but it can also be expected a constant proportionality between the two speeds. It is recalled that the bottom of the spinning wheel vein has a concave annular surface.
  • the polishing device according to the present invention is in the low position, which corresponds to the rest position.
  • the wheel 2 is fixed on the support 10, for that the wheel 2 is mounted around the shaft 12 of the support 10 which passes through the central bore of the wheel, the wheel 2 and the support 10 being then coaxial and motionless relative to each other.
  • the wheel 2 then bears on the plate 19.
  • the plate 14 is then fixed on the upper end of the shaft 12 of the support 10 and holds the wheel tightly between the plate 19 and the plate 14.
  • the polishing agent is then placed in the tank 8, the amount of polishing agent, more particularly the polishing agent height covering the wheel 2, is determined as a function of the polishing that it is desired to carry out, in particular the duration of it.
  • the drive means are then started up, their control having been programmed according to the pitch of the blade propeller 6 of the wheel 2 to be reproduced.
  • the first and second motors then rotate and translate respectively the support 10 which moves the wheel 2 in the tank 8 filled with polishing agent, the tube 16 sliding in a sealed manner through the bottom of the tank 8, as one can see it in Figure 2.
  • the speed of rotation of the support and the time during which the wheel is polished are previously determined according to the required level of polishing, these characteristics being generally determined by experience.
  • the wheel is then moved in rotation and in translation, in the example shown it turns counterclockwise (arrow 18) and moves upwards (arrow 20). All the points of the wheel 2 thus traverse virtual helices with pitch p from bottom to top, until reaching a high position shown in FIG.
  • the direction of relative displacement of the polishing agent and the spinning wheel is substantially the same as that which the air will travel in the wheel when it equips the compressor.
  • the wheel 2 enters the tank 8 through a lower end of the tank 8, but it could be expected that the impeller enters the tank at its upper end and moves towards the lower end of the tank. tank.
  • the pressure exerted by the particles would not be simply the static pressure proportional to the height of particles, but would be that applied by the support in an axial direction oriented towards the bottom of the tank. Therefore, the control of this pressure would be more complex than in the example shown.
  • the method according to the present invention makes it possible to polish any type of wheel, whatever their dimensions.
  • polishing according to the method of the invention can be easily automated, it does not require human intervention during polishing. It is also simple and robust.
  • this method applies to all materials by choosing the appropriate abrasive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

Device for polishing centrifugal impellers (2) for a turbomachine compressor, comprising a tank (8) intended to be filled with a polishing agent, an impeller support (10) able to turn the impeller (2) about its axis and move it along its axis so that all points of the impeller (2) are moved in a helical path the pitch of which is similar to that of the helix from which the overall shape of the airstreams of the impeller, delimited by the impeller blades, is derived.

Description

PROCEDE DE POLISSAGE DE DISQUES MUNIS D'UN AUBAGE POUR TURBOMACHINE ET DISPOSITIF DE POLISSAGE METHOD OF POLISHING DISCS WITH TURBOMACHINE-BASED TANK AND POLISHING DEVICE
DESCRIPTIONDESCRIPTION
DOMAINE TECHNIQUE ET ART ANTÉRIEURTECHNICAL FIELD AND PRIOR ART
La présente invention se rapporte principalement à un procédé de polissage de disques munis d'un aubage et comportant une veine aérodynamique pour turbomachines, plus particulièrement à un procédé de polissage de rouets centrifuges pour compresseur de turbomachine et de disques aubagés monoblocs, et à un dispositif de polissage pour la mise en œuvre d'un tel procédé .The present invention relates mainly to a method of polishing disks provided with a blade and comprising an aerodynamic stream for turbomachines, more particularly to a method of polishing centrifugal wheels for a turbomachine compressor and bladed disks, and to a device polishing for the implementation of such a method.
Les turbomachines comportent classiquement un compresseur, une chambre de compression et une turbine .Turbomachines conventionally comprise a compressor, a compression chamber and a turbine.
Le compresseur est destiné à augmenter la pression de l'air atmosphérique, la chambre de combustion mélange l'air qui est comprimé par le compresseur avec du carburant et brûle ce mélange, et la turbine, placée dans le flux éjecté, est entraînée par ce flux d'air très chaud. Elle sert à entraîner le compresseur par l'intermédiaire de l'axe de la turbomachine . Le compresseur comporte des rotors, lesdits rotors comportant des disques aubagés, appelés pour certains d'entre eux des rouets centrifuges, et des stators. Un rouet centrifuge, désigné par la suite rouet, comporte un corps sensiblement tronconique et des pales réparties sur toute la surface du corps. Ces pales délimitent deux à deux avec le corps tronconique, une veine d'écoulement d'air en forme de portion d'hélice.The compressor is intended to increase the pressure of the atmospheric air, the combustion chamber mixes the air which is compressed by the compressor with fuel and burns this mixture, and the turbine, placed in the ejected stream, is driven by this very hot air flow. It serves to drive the compressor via the axis of the turbomachine. The compressor comprises rotors, said rotors comprising bladed disks, some of which are called centrifugal spinning wheels, and stators. A centrifugal wheel, designated subsequently wheel, has a substantially frustoconical body and blades spread over the entire surface of the body. These blades delimit two by two with the frustoconical body, a stream of air flow in the form of a helix portion.
Un rouet centrifuge présente donc une forme complexe.A centrifugal wheel thus has a complex shape.
Ce rouet est, pour certaines applications, taillé directement dans la masse, par exemple dans un bloc en alliage de titane ou de nickel. Un tel rouet peut également être obtenu par fonderie, par prototypage rapide ou par voie électrochimique.This wheel is, for some applications, cut directly into the mass, for example in a titanium alloy block or nickel. Such a wheel may also be obtained by casting, by rapid prototyping or electrochemically.
En outre, du fait de la fonction aérodynamique que doivent remplir les rouets centrifuges, l'état de surface du rouet, plus spécialement de la surface du corps tronconique formant le fond de la veine le long de laquelle s'écoule l'air, et celui des pales, revêtent une grande importance et un soin tout particulier est apporté à leur réalisation .In addition, because of the aerodynamic function which the centrifugal wheels must fulfill, the surface state of the wheel, especially the surface of the frustoconical body forming the bottom of the vein along which the air flows, and that of the blades, are of great importance and a particular care is brought to their realization.
Pour satisfaire aux conditions aérodynamiques de l'air s' écoulant sur le rouet, le critère de rugosité Ra ne doit pas dépasser 0,6 μm (Ra est une valeur statistique et correspond à l'écart moyen arithmétique par rapport à la ligne moyenne ; Rt est la hauteur maximale des crêtes) . Or cette valeur de rugosité ne peut être obtenue directement par usinage, par fonderie ou par une autre technique de réalisation du rouet. Une étape de polissage est donc nécessaire afin d'atteindre la qualité de surface exigée.To satisfy the aerodynamic conditions of the air flowing on the wheel, the roughness criterion Ra must not exceed 0.6 μm (Ra is a statistical value and corresponds to the arithmetical average deviation from the mean line; Rt is the maximum height of the peaks). However this roughness value can not be obtained directly by machining, by foundry or by another technique of realization of the wheel. A polishing step is therefore necessary in order to achieve the required surface quality.
Il existe plusieurs techniques pour polir de telles pièces. Le polissage peut être effectué manuellement à l'aide de bandes abrasives. Cette technique présente l'avantage de permettre le polissage de pièces de formes complexes. Cependant, ce polissage est très long, il est donc coûteux en main d'œuvre. Par ailleurs, sa qualité dépend entièrement de l'opérateur qui effectue ce polissage.There are several techniques for polishing such pieces. Polishing can be done manually using abrasive belts. This technique has the advantage of allowing the polishing of parts of complex shapes. However, this polishing is very long, so it is expensive in labor. Moreover, its quality depends entirely on the operator who performs this polishing.
Des machines, telles que celles décrites dans le brevet US 2 547 056 peuvent être utilisées, cependant elles sont de structures très complexes et ne permettent pas le polissage de pièces de formes complexes .Machines, such as those described in US Pat. No. 2,547,056 can be used, however they are of very complex structures and do not allow the polishing of pieces of complex shapes.
Il existe également un polissage au moyen de particules abrasives, tel que décrit dans le document JP 57211469. Cette technique prévoit de monter un couvercle sur le rouet de manière à enfermer la zone active du rouet comportant les pales dans un espace clos et à placer dans ce volume des particules abrasives, puis de mettre en rotation le rouet autour de son axe disposé horizontalement. La rotation et la gravité provoquent le déplacement des particules sur la surface à polir. Lorsque l'état de surface requis est atteint, la rotation du rouet est interrompue, le couvercle et les particules sont retirés. Avec cette technique, il existe un risque de ne pas atteindre le critère de rugosité Ra voulu du fait d'une stagnation des particules abrasives dans les zones en question.There is also polishing using abrasive particles, as described in JP 57211469. This technique provides for mounting a cover on the wheel so as to enclose the active area of the impeller comprising the blades in an enclosed space and to place in this volume of abrasive particles, then to rotate the wheel about its axis disposed horizontally. Rotation and gravity cause the particles to move on the surface to be polished. When the required surface condition is reached, rotation of the impeller is interrupted, the cover and the particles are removed. With this technique, there is a risk of not achieving the desired Ra roughness criterion due to stagnation of the abrasive particles in the areas in question.
C'est par conséquent un but de la présente invention de proposer un procédé de polissage de rouets centrifuge, et plus généralement de pièces aubagées de turbomachine, simple, adapté à tous les types de rouets quelle que soit la complexité de leur forme et offrant un état de surface particulièrement performant pour l'écoulement de l'air.It is therefore an object of the present invention to provide a method of polishing spinning wheels, and more generally turbomachine bladed pieces, simple, suitable for all types of spinning wheels regardless of the complexity of their shape and offering a particularly efficient surface condition for the flow of air.
C'est également un but de la présente invention de proposer un dispositif de polissage de disques munis d'un aubage, simple et robuste.It is also an object of the present invention to provide a disk polishing device provided with a blade, simple and robust.
EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION
Le but de la présente invention est atteint par un procédé de polissage utilisant au moins un agent polissant dans lequel on prévoit de déplacer le rouet, ou plus généralement le disque muni d'un aubage comportant des pales définissant des veines d'air formées d'une portion d'hélice, selon un mouvement hélicoïdal dont le pas est proche du pas de l'hélice. Deux pales du rouet délimitent une veine d'air, cette veine d'air a sensiblement le profil d'une portion d'hélice conique. On appelle alors « pas de l'hélice du rouet », le pas de l'hélice formée par la veine d'air. Toutes les veines d'air délimitées par deux pales successives ont sensiblement le même profil en hélice.The object of the present invention is achieved by a polishing process using at least one polishing agent in which it is intended to move the wheel, or more generally the disk provided with a blade having blades defining air veins formed of a portion of a helix, in a helical movement whose pitch is close to the pitch of the helix. Two blades of the wheel define a vein of air, this air stream has substantially the profile of a conical propeller portion. The pitch of the helix formed by the air vein is then called the "impeller pitch". All the air veins delimited by two successive blades have substantially the same profile in a helix.
Selon l'invention, le rouet est déplacé en translation et en rotation de sorte à reproduire la portion d'hélice décrite par les veines d'air. Les vitesses de rotation et de translation sont alors adaptées pour que tout point du rouet ait un déplacement dont la trajectoire est proche de l'hélice du rouet.According to the invention, the wheel is moved in translation and in rotation so as to reproduce the portion of the propeller described by the air veins. The rotational and translational speeds are then adapted so that any point of the wheel has a displacement whose trajectory is close to the propeller of the wheel.
Ainsi le mouvement de l'agent polissant par rapport à l' aubage est sensiblement celui de l'écoulement de l'air entre les pales, ce qui améliore les performances du procédé.Thus the movement of the polishing agent with respect to the blading is substantially that of the flow of air between the blades, which improves the performance of the process.
De manière avantageuse, le procédé selon l'invention prévoit d'appliquer un mouvement alternatif, l'aubage est alors déplacé dans un premier sens de rotation et un premier sens de translation, puis est déplacé dans un deuxième sens de rotation opposé au premier sens de rotation et dans un deuxième sens de translation opposé au premier sens de translation, ces deux combinaisons de mouvement étant reproduites alternativement.Advantageously, the method according to the invention provides for reciprocating movement, the blade is then moved in a first direction of rotation and a first direction of translation, then is moved in a second direction of rotation opposite to the first direction. rotation and in a second direction of translation opposite to the first direction of translation, these two combinations of movement being reproduced alternately.
La présente invention a alors principalement pour objet un procédé de polissage d'un disque muni d'un aubage, l'aubage comportant une pluralité d'aubes définissant deux à deux une veine d'air ayant sensiblement un profil général en forme de portion d'hélice de pas p, ledit disque étant immergé dans un lit d'agent polissant, ledit procédé comportant au moins : - une étape A de déplacement dudit disque dans un premier sens de rotation autour de l'axe longitudinal du disque et dans un premier sens de translation le long dudit axe longitudinal simultanément, de sorte que le parcours de chacun des points dudit disque soit au moins une portion d'une hélice dont le pas est proche du pas p de l'hélice dont est issue la forme générale des veines d'air.The main subject of the present invention is therefore a method of polishing a disk provided with a blade, the blade comprising a plurality of blades defining in pairs an air stream having substantially a general shape in the form of a portion of a blade. p-pitch helix, said disk being immersed in a bed of polishing agent, said method comprising at least: a step A of moving said disk in a first direction of rotation about the longitudinal axis of the disk and in a first direction of translation along said longitudinal axis simultaneously, so that the path of each point of said disk is at least a portion of a helix whose pitch is close to the pitch p of the helix from which the general shape of the veins is derived air.
Le procédé selon l'invention peut également comporter au moins : - une étape B ultérieure à l'étape A de déplacement en rotation autour de l'axe longitudinal du disque dans un deuxième sens opposé au premier sens et de déplacement en translation le long dudit axe longitudinal dans un deuxième sens opposé au premier sens simultanément de sorte que tous les points du disque parcourent respectivement les mêmes hélices qu'à l'étape A mais dans en sens opposé.The method according to the invention may also comprise at least: a step B subsequent to step A of displacement in rotation around the longitudinal axis of the disc in a second direction opposite to the first direction and displacement in translation along said longitudinal axis in a second direction opposite to the first direction simultaneously so that all the points of the disc travel respectively the same propellers as in step A but in in the opposite way.
De manière particulièrement avantageuse, les étapes A et B sont répétées alternativement.Particularly advantageously, steps A and B are repeated alternately.
La vitesse de rotation du rouet et la vitesse de translation du rouet sont avantageusement reliées par un coefficient de proportionnalité calculé en fonction de la tangente de la portion d'hélice dont est issue la forme générale des veines d'air.The rotational speed of the impeller and the speed of translation of the impeller are advantageously connected by a coefficient of proportionality calculated as a function of the tangent of the helical portion from which the general shape of the air streams originates.
Le procédé selon l'invention peut comporter une étape C, préalable à l'étape A, de détermination de la pression statique à appliquer au disque et de mise en place d'une quantité d'agent polissant donnée en fonction de la pression statique déterminée précédemment au-dessus dudit disque. L'agent polissant peut être constitué par des particules abrasives solides, de formes appropriées à la circulation entre les aubages du rouet.The method according to the invention may comprise a step C, prior to step A, of determining the static pressure to be applied to the disk and setting up a quantity of polishing agent given as a function of the static pressure determined. previously above said disk. The polishing agent may consist of solid abrasive particles of shapes suitable for circulation between the rotor blades.
Avantageusement, l'agent polissant peut être mélangé avec de l'eau, avec un acide adapté au matériau à polir ou être mélangé à un média de sorte à former une pâte.Advantageously, the polishing agent may be mixed with water, with an acid adapted to the material to be polished or mixed with a medium so as to form a paste.
Le procédé de polissage s'applique avantageusement aux rouets centrifuges pour un compresseur de turbomachine . La présente invention a également pour objet un dispositif de polissage comportant une cuve destinée à être remplie d'un agent polissant, un support de disque muni d'un aubage, 1 ' aubage comportant une pluralité d'aubes définissant deux à deux une veine d'air ayant sensiblement un profil général en forme de portion d'hélice de pas p, et des moyens d'entraînement aptes à entraîner en rotation le support autour de son axe longitudinal et en translation le long dudit axe longitudinal simultanément, les moyens d'entraînement étant programmés de sorte à faire parcourir à chaque point du support au moins une portion d'hélice dont le pas est proche du pas p de l'hélice dont est issue la forme générale des veines d'air du disque à polir.The polishing process advantageously applies to centrifugal wheels for a turbomachine compressor. The present invention also relates to a polishing device comprising a tank intended to be filled with a polishing agent, a disk support provided with a blade, one blade comprising a plurality of vanes defining in pairs an air stream having substantially a general shape in the form of a helix portion p step, and drive means capable of rotating the support about its longitudinal axis and in translation along said longitudinal axis simultaneously, the drive means being programmed so as to go through each point of the support at minus a portion of a helix whose pitch is close to the pitch p of the helix from which the general shape of the air veins of the disk to be polished results.
Le support peut comporter un arbre d' axe longitudinal sur lequel le disque à polir est destiné à être fixé de manière coaxiale et dans lequel la cuve comporte un fond muni d'une ouverture traversée par ledit arbre du support, le dispositif comportant également des moyens d'étanchéité entre le fond de la cuve et le disque. Les moyens d'étanchéité comportent avantageusement un tube apte à coulisser dans ladite ouverture selon la direction longitudinale de manière étanche, un plateau sur lequel le disque est destiné à être monté, ledit plateau étant fixé sur une extrémité longitudinale du tube pénétrant dans la cuve, ledit tube ayant un diamètre extérieur sensiblement égal au diamètre extérieur de la partie du disque en appui sur le tube et au diamètre de l'ouverture pratiquée dans la cuve . De manière particulièrement avantageuse, la face du plateau destinée à être en contact avec le disque comporte une rainure annulaire recevant un joint d'étanchéité destiné à venir en contact avec le disque et à empêcher la pénétration de l'agent polissant entre le disque et le plateau. Le dispositif selon l'invention peut comporter des moyens de maintien du disque sur le support, ledit disque étant destiné à être maintenu par serrage entre une platine fixée sur une extrémité libre de l'arbre du support et le plateau. Le dispositif selon l'invention comporte avantageusement un joint d'étanchéité entre la cuve et le tube, du type joint torique ou joint à lèvre.The support may comprise a shaft of longitudinal axis on which the disk to be polished is intended to be fixed coaxially and in which the tank has a bottom provided with an opening through which said support shaft, the device also comprising means sealing between the bottom of the tank and the disc. The sealing means advantageously comprise a tube capable of sliding in said opening in the longitudinal direction in a sealed manner, a plate on which the disk is intended to be mounted, said plate being fixed on a longitudinal end of the tube penetrating into the tank, said tube having an outer diameter substantially equal to the outer diameter of the portion of the disc resting on the tube and the diameter of the opening in the tank. In a particularly advantageous manner, the face of the plate intended to be in contact with the disc comprises an annular groove receiving a seal intended to come into contact with the disc and to prevent penetration of the polishing agent between the disc and the plate. The device according to the invention may comprise means for holding the disk on the support, said disk being intended to be held by clamping between a plate fixed on a free end of the support shaft and the plate. The device according to the invention advantageously comprises a seal between the tank and the tube, of the O-ring or lip seal type.
Avantageusement, le diamètre du tube est sensiblement égal au diamètre du disque du côté de son bord de fuite.Advantageously, the diameter of the tube is substantially equal to the diameter of the disk on the side of its trailing edge.
Les moyens d'entraînement comportent, par exemple un premier moteur destiné à entraîner le support en rotation autour de son axe longitudinal et un deuxième moteur destiné à entraîner le support en translation le long dudit axe longitudinal, le premier moteur étant apte à entraîner le support en rotation dans un premier sens et dans un deuxième sens opposé au premier sens de manière alternative, et le deuxième moteur étant apte à entraîner le support en translation dans un premier sens de translation et dans un deuxième sens de translation opposée au premier sens de manière alternative .The drive means comprise, for example a first motor for driving the support in rotation about its longitudinal axis and a second motor for driving the support in translation along said longitudinal axis, the first motor being adapted to drive the support. in rotation in a first direction and in a second direction opposite to the first direction alternately, and the second motor being able to drive the support in translation in a first direction of translation and in a second direction of translation opposite to the first direction so as to alternative.
Le dispositif de polissage selon l'invention est avantageusement utilisé pour polir un rouet centrifuge de compresseur pour turbomachine . BREVE DESCRIPTION DES DESSINSThe polishing device according to the invention is advantageously used to polish a turbomachine compressor centrifugal wheel. BRIEF DESCRIPTION OF THE DRAWINGS
La présente invention sera mieux comprise à l'aide de la description qui va suivre et des dessins en annexe sur lesquels : - la figure 1 est une vue en perspective d'un rouet centrifuge auquel peut être appliqué 1' invention, la figure 2 est une représentation schématique en coupe d'un dispositif de polissage selon la présente invention, le rouet étant en place, la figure 3 est une représentation du dispositif de polissage de la figure 2, le dispositif de polissage étant dans un état différent, le rouet étant en place.The present invention will be better understood with the aid of the following description and the appended drawings in which: FIG. 1 is a perspective view of a centrifugal impeller to which the invention can be applied, FIG. a schematic representation in section of a polishing device according to the present invention, the wheel being in place, Figure 3 is a representation of the polishing device of Figure 2, the polishing device being in a different state, the wheel being in place.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
Dans la suite de la description, nous appliquerons le procédé de polissage à un rouet centrifuge de compresseur de turbomachine, cependant la présente invention s'applique à toute pièce munie d'un aubage, telle qu'un disque aubagé monobloc utilisé dans une turbine.In the following description, we will apply the polishing process to a turbomachine compressor centrifugal wheel, however the present invention is applicable to any part provided with a blade, such as a bladed disk monobloc used in a turbine.
Sur la figure 1, on peut voir un exemple de rouet centrifuge 2 de compresseur auquel s'applique 1' invention . Un rouet centrifuge est une pièce mobile en rotation autour de l'axe longitudinal de la turbomachine et est entraîné par la turbine.In Figure 1, there can be seen an example of compressor centrifugal wheel 2 to which the invention applies. A centrifugal wheel is a part movable in rotation about the longitudinal axis of the turbomachine and is driven by the turbine.
Le rouet 2 comporte un flasque 3 de forme sensiblement annulaire d'axe X. Le flasque 3 comporte, à une première extrémité longitudinale, une grande base 3.1 de plus grand diamètre et, à une deuxième extrémité longitudinale, une petite base 3.2 de plus petit diamètre, le plus grand diamètre et le plus petit diamètre étant raccordés par une surface annulaire concave 4 appelée veine.The wheel 2 comprises a flange 3 of substantially annular shape of axis X. The flange 3 comprises, at a first longitudinal end, a large base 3.1 of larger diameter and, at a second longitudinal end, a small base 3.2 of smaller diameter, the largest diameter and the smallest diameter being connected by a concave annular surface 4 called vein.
Le rouet 2 comporte également des pales 6 en saillie de la surface annulaire concave 4. Les pales 6 sont réparties sur toute la périphérie extérieure du flasque 3 de manière régulière, et s'étendent de la petite base 3.2 du flasque vers la grande base 3.1 du flasque 3, et se raccordent au flasque par des rayons.The wheel 2 also comprises blades 6 projecting from the concave annular surface 4. The blades 6 are distributed over the entire outer periphery of the flange 3 in a regular manner, and extend from the small base 3.2 of the flange to the large base 3.1 flange 3, and are connected to the flange by spokes.
Les extrémités 6.1 des pales du côté de la petite base 3.2 forment les bords d'attaque et les extrémités du côté de la grande base 3.1 forment les bords de fuite.The ends 6.1 of the blades on the side of the small base 3.2 form the leading edges and the ends of the side of the large base 3.1 form the trailing edges.
Chaque pale 6 a, vu de dessus, approximativement la forme d'une portion d'hélice. Toutes les pales sont sensiblement identiques et donc issues d'une même portion d'hélice de pas p. Les pales délimitent deux à deux des veines d'air dans lesquelles l'air à comprimer circule du bord d'attaque vers le bord de fuite. Les veines d'air ont donc un profil général en forme de portion d'hélice sensiblement identique à celle des pales 6. Le rouet peut être réalisé par usinage d'un bloc de métal, par exemple du titane. A la fin de l'étape d'usinage, la surface du rouet est facettée et est inacceptable dans l'état. Il peut également être réalisé directement par fonderie, par prototypage rapide ou pour par procédé électrochimique. Ce rouet subit ensuite de manière connue une étape de polissage.Each blade 6 has, seen from above, approximately the shape of a helix portion. All blades are substantially identical and therefore from the same portion of pitch helix p. The blades delimit two by two air veins in which the air to be compressed flows from the leading edge to the trailing edge. The air streams therefore have a generally helical portion-like profile substantially identical to that of the blades 6. The wheel may be made by machining a metal block, for example titanium. At the end of the machining step, the surface of the impeller is faceted and is unacceptable in the state. It can also be produced directly by casting, rapid prototyping or electrochemical process. This wheel then undergoes in a known manner a polishing step.
La présente invention propose un procédé de polissage de mise en œuvre simple et un dispositif de polissage robuste d'un tel rouet, offrant par ailleurs des propriétés aérodynamiques améliorées au rouet.The present invention provides a simple polishing method of implementation and a robust polishing device of such a wheel, also providing improved aerodynamic properties to the wheel.
Sur les figures 2 et 3, on peut voir un exemple de réalisation d'un dispositif de polissage selon la présente invention comportant une cuve 8 destinée à contenir un agent polissant. Le rouet 2 est représenté schématiquement .In Figures 2 and 3, we can see an embodiment of a polishing device according to the present invention comprising a tank 8 for containing a polishing agent. The wheel 2 is shown schematically.
L'agent polissant est formé au moins en partie par des particules solides abrasives. L'agent polissant peut être contenu dans une pâte ou mélangé à un fluide, tel que de l'eau. Les particules formant l'agent polissant peuvent être formées d'alumine, de carbure de silicium, de carbure de bore... Cette liste n'est pas exhaustive, le matériau des particules étant choisi en fonction du matériau de la pièce à polir. La taille de ces particules est également choisie en fonction de l'état de surface à atteindre. On peut prévoir d'associer aux particules abrasives un abrasif chimique, tel qu'un acide.The polishing agent is formed at least in part by abrasive solid particles. The polishing agent may be contained in a paste or mixed with a fluid, such as water. The particles forming the polishing agent may be formed of alumina, silicon carbide, boron carbide, etc. This list is not exhaustive, the material of the particles being chosen as a function of the material of the part to be polished. The size of these particles is also chosen according to the surface state to be achieved. It can be expected to associate the abrasive particles with a chemical abrasive, such as an acid.
Selon la présente invention, le dispositif de polissage comporte également un support mobile 10 apte à déplacer le rouet 2 en rotation autour d'un axe Xl et en translation le long de l'axe Xl dans la cuve 8.According to the present invention, the polishing device also comprises a mobile support 10 able to move the wheel 2 in rotation about an axis X 1 and in translation along the axis X 1 in the tank 8.
Selon la présente invention, le déplacement du support dans la cuve est commandé de telle sorte que tout point de celui-ci se déplace selon une hélice de pas identique, ou au moins proche du pas p de celle dont sont issues les pales du rouet.According to the present invention, the displacement of the support in the tank is controlled so that any point thereof moves in a helix of not identical, or at least close to the pitch p of the one from which the blades of the wheel are derived.
Pour cela, le dispositif de polissage comporte des moyens d'entraînement (non représentés) du support destinés à appliquer simultanément au support 10 un mouvement de rotation et un mouvement de translation, chaque mouvement ayant une vitesse déterminée de sorte à reproduire le pas p de l'hélice.For this, the polishing device comprises drive means (not shown) of the support intended to simultaneously apply to the support 10 a rotational movement and a translational movement, each movement having a determined speed so as to reproduce the pitch p of the propeller.
De manière avantageuse, les moyens d'entraînement sont aptes à déplacer le support 10 de sorte que tout point de celui-ci parcourt une hélice de pas donné dans une direction, par exemple de bas en haut, puis parcourt la même hélice dans un sens opposé, c'est-à-dire de haut en bas. Ainsi, le support a un mouvement alternatif, et se déplace vers le haut, puis vers le bas alternativement. L'agent polissant entre les pales 6 a alors un mouvement de va-et-vient par rapport au rouet de forme hélicoïdale et de pas p. Ce mouvement de va-et-vient permet également d'avoir un dispositif plus compact puisque la course de déplacement du disque peut être réduite.Advantageously, the drive means are able to move the support 10 so that any point thereof traverses a given pitch helix in a direction, for example from the bottom upwards, then travels the same helix in a direction opposite, that is, from top to bottom. Thus, the support is reciprocated, and moves up and down alternately. The polishing agent between the blades 6 is then reciprocated with respect to the helical impeller and not p. This back-and-forth movement also allows for a more compact device since the displacement travel of the disc can be reduced.
Les moyens d'entraînement peuvent déplacer le support 10 sur moins d'un pas d'hélice, un pas d'hélice ou plus d'un pas d'hélice. Par conséquent, en fixant un rouet 2 sur le support de telle sorte que l'axe X du rouet 2 soit coaxial à l'axe Xl de rotation du support, l'agent polissant va se déplacer entre les pales 6 en reproduisant sensiblement les lignes de courant dans les veines d'air. Le polissage s'opère donc de manière directionnelle et améliore les performances aérodynamiques du rouet 2.The drive means can move the carrier 10 on less than one helix pitch, one helix pitch or more than one helix pitch. Therefore, by fixing a wheel 2 on the support so that the axis X of the wheel 2 is coaxial with the axis Xl of rotation of the support, the polishing agent will move between the blades 6 substantially reproducing the lines of current in the veins of air. So the polishing is done so directional and improves the aerodynamic performance of the wheel 2.
Plus particulièrement, le dispositif tel que représenté comporte une ouverture 11 dans le fond de la cuve 8 pour le passage du support 10. Le support 10 est formé d'un arbre 12 d'axe Xl autour duquel le rouet 2 est monté, entrainé par les moyens d'entraînement. Le support 10 comporte des moyens de solidarisation de manière fixe du rouet 2 sur une extrémité libre (non visible) de l'arbre 12 située dans la cuve 8. Ces moyens de solidarisation sont, par exemple formés par un système de serrage prenant en sandwich un partie centrale du rouet 2 ne nécessitant pas de polissage par le dispositif selon l'invention. Une platine 14, obturant l'alésage central du rouet 2, est prévue et fait partie du système de serrage. La platine 14 est par exemple maintenue au moyen d'un boulon vissé dans l'arbre 12.More particularly, the device as shown has an opening 11 in the bottom of the tank 8 for the passage of the support 10. The support 10 is formed of a shaft 12 of axis X1 around which the wheel 2 is mounted, driven by the drive means. The support 10 comprises means for fixedly securing the impeller 2 on a free end (not visible) of the shaft 12 located in the tank 8. These securing means are, for example formed by a clamping system sandwiching a central portion of the wheel 2 does not require polishing by the device according to the invention. A plate 14, closing the central bore of the wheel 2, is provided and is part of the clamping system. The plate 14 is for example maintained by means of a bolt screwed into the shaft 12.
Une étanchéité est également prévue entre le support 10 et la cuve 8, plus particulièrement entre le support 10 et l'ouverture 11.A seal is also provided between the support 10 and the tank 8, more particularly between the support 10 and the opening 11.
Dans l'exemple de réalisation représenté, la tige 12 est surmontée d'un plateau 19 servant d'appui au rouet 2, sur lequel repose la grande base 3.1 du rouet. Un tube 16 de diamètre extérieur sensiblement égal au diamètre extérieur du rouet côté bord de fuite est fixé, par une extrémité longitudinale 16.1, sur le plateau 19, par exemple au moyen d'une soudure, le plateau 19 forme alors le fond du tube 16. Le diamètre de l'ouverture 11 est sensiblement égal au diamètre extérieur du tube 16 afin d'assurer un contact glissant entre le tube 16 et la périphérie de l'ouverture 11.In the embodiment shown, the rod 12 is surmounted by a plate 19 serving to support the wheel 2, on which the large base 3.1 of the wheel. A tube 16 of outside diameter substantially equal to the outer diameter of the flywheel side edge is fixed, by a longitudinal end 16.1, on the plate 19, for example by means of a weld, the plate 19 then forms the bottom of the tube 16 The diameter of the opening 11 is substantially equal to the outside diameter of the tube 16 to ensure contact sliding between the tube 16 and the periphery of the opening 11.
Le plateau 19 comporte à sa périphérie extérieure une rainure annulaire dans laquelle un joint 21 est disposé. Ce joint 21 assure l'étanchéité entre le plateau 19 et le rouet 2 afin d'éviter que des particules ou du fluide, par exemple un acide, ne vienne s'insérer entre le rouet et le plateau.The plate 19 comprises at its outer periphery an annular groove in which a seal 21 is disposed. This seal 21 seals between the plate 19 and the wheel 2 to prevent particles or fluid, for example an acid, to be inserted between the wheel and the plate.
Le tube 16 est apte à se déplacer au moins en translation le long de l'axe Xl afin de suivre le rouet 2 et de rester en contact avec celui-ci.The tube 16 is able to move at least in translation along the axis Xl to follow the wheel 2 and stay in contact therewith.
Un joint d'étanchéité 17, de type joint torique ou joint à lèvre, est également prévu pour confirmer l'étanchéité entre le tube 16 et le fond de la cuve 8.A seal 17, of O-ring or lip seal type, is also provided to confirm the seal between the tube 16 and the bottom of the tank 8.
Dans une variante de réalisation, on pourrait prévoir que le rouet repose directement sur l'extrémité longitudinale 16.1 du tube 16, 1' ' étanchéité entre le tube 16 et le rouet 2 étant alors obtenue par un simple contact métal/métal ou par un joint supplémentaire. De manière avantageuse, le tube 16 est immobile par rapport au rouet 2, i.e. il se déplace selon un mouvement identique à celui du rouet 2 afin d'éviter tout déplacement relatif entre le tube 16 et le rouet 2, améliorant ainsi l'étanchéité ente le tube 16 et le rouet 2 et évite une usure du tube 16 et/ou du rouet 2. On peut prévoir également de fixer le tube sur le rouet, ou alors de solidariser le tube au support mobile 10 en rotation et en translation Le maintien du rouet est obtenu, de manière avantageuse, par serrage de celui-ci entre la platine 14 et le plateau 19.In an alternative embodiment, it could be provided that the wheel rests directly on the longitudinal end 16.1 of the tube 16, 1 'sealing between the tube 16 and the wheel 2 is then obtained by a simple metal / metal contact or by a seal additional. Advantageously, the tube 16 is immobile with respect to the wheel 2, ie it moves in a movement identical to that of the wheel 2 in order to avoid any relative displacement between the tube 16 and the wheel 2, thus improving the seal between the tube 16 and the wheel 2 and avoids wear of the tube 16 and / or the wheel 2. It is also possible to fix the tube on the wheel, or to secure the tube to the movable support 10 in rotation and in translation Holding the wheel is advantageously obtained by clamping it between the plate 14 and the plate 19.
Le rouet 2 est immergé dans un lit d'agent polissant (non représenté) . Dans cet exemple de réalisation, les particules abrasives sont disposées au-dessus de la surface à polir, la pression statique des particules abrasives sur le rouet 2 est donc directement proportionnelle à la hauteur de particules au dessus du rouet 2, qui correspond à la distance moyenne d'immersion du rouet 2 dans la cuve 8.The wheel 2 is immersed in a bed of polishing agent (not shown). In this embodiment, the abrasive particles are disposed above the surface to be polished, the static pressure of the abrasive particles on the impeller 2 is therefore directly proportional to the height of the particles above the impeller 2, which corresponds to the distance average immersion of the wheel 2 in the tank 8.
Les particules abrasives sont telles qu'elles se comportent comme un fluide.The abrasive particles are such that they behave like a fluid.
Il est alors possible de faire varier l'efficacité du polissage, et donc le temps requis pour obtenir l'état de surface souhaité en modifiant simplement la quantité de particules dans la cuve, plus précisément la hauteur de particules. Aucun moyen spécifique pour exercer une pression supplémentaire sur les particules n'est alors nécessaire. Le réglage de la pression ne s'effectue que de manière mécanique en choisissant la hauteur de l'agent polissant. Ce dispositif est très simple et ne demande aucun moyen de surveillance particulier. Il est donc très robuste. Cependant un tel moyen, de type piston, exerçant un effort axial en direction du fond de la cuve pourrait être envisagé.It is then possible to vary the effectiveness of the polishing, and therefore the time required to obtain the desired surface state by simply changing the amount of particles in the tank, more precisely the height of particles. No specific means for exerting additional pressure on the particles is then necessary. The adjustment of the pressure is carried out only mechanically by choosing the height of the polishing agent. This device is very simple and does not require any particular means of monitoring. It is very robust. However such a means, piston type, exerting an axial force towards the bottom of the tank could be considered.
En outre, la vitesse relative entre l'agent polissant et le rouet dépend directement de la vitesse de rotation du rouet 2, est donc de la vitesse de déplacement du support 10. Par conséquent, il est possible de faire varier le temps de polissage du rouet 2 en faisant varier la vitesse de déplacement du support 10.In addition, the relative velocity between the polishing agent and the impeller depends directly on the rotational speed of the impeller 2, so is the speed of movement of the carrier 10. Therefore, it is it is possible to vary the polishing time of the wheel 2 by varying the speed of movement of the support 10.
Les moyens d'entraînement comportent un premier moteur destiné à entraîner en rotation le support et un deuxième moteur destiné à entraîner en translation le support 10 le long de l'axe X.The drive means comprise a first motor for rotating the support and a second motor for translating the support 10 along the X axis.
A titre d'exemple, la vitesse de déplacement des particules par rapport au rouet peut être comprise entre 2 m/min et 20 m/min ; le temps de polissage peut alors être compris ente 10 min et 5 heures. Il est à noter qu'il s'agit de vitesses estimées. De manière générale, on règle les paramètres après expérimentation en trouvant le meilleur compromis entre le temps de traitement, la préservation de la pièce et le critère de rugosité Ra obtenu.For example, the speed of movement of the particles relative to the wheel may be between 2 m / min and 20 m / min; the polishing time can then be understood between 10 min and 5 hours. It should be noted that these are estimated speeds. In general, the parameters are adjusted after experimentation by finding the best compromise between the processing time, the preservation of the workpiece and the roughness criterion Ra obtained.
Les vitesses de translation et de rotation sont reliées par un coefficient de proportionnalité qui est obtenu à partir de la valeur de la tangente de l'hélice du rouet. Les vitesses de rotation et de translation varient donc au cours du mouvement puisque la tangente de l'hélice varie, mais il peut également être prévu une proportionnalité constante entre les deux vitesses. Il est rappelé que le fond de la veine du rouet a une surface annulaire concave.The translational and rotational speeds are connected by a coefficient of proportionality which is obtained from the value of the tangent of the impeller of the impeller. The speeds of rotation and translation therefore vary during the movement since the tangent of the helix varies, but it can also be expected a constant proportionality between the two speeds. It is recalled that the bottom of the spinning wheel vein has a concave annular surface.
Nous allons maintenant décrire les étapes de polissage au moyen d'un dispositif de polissage selon la présente invention.We will now describe the polishing steps by means of a polishing device according to the present invention.
Sur la figure 2, le dispositif de polissage selon la présente invention se trouve en position basse, ce qui correspond à la position repos. Lors d'une première étape, le rouet 2 est fixé sur le support 10, pour cela on monte le rouet 2 autour de l'arbre 12 du support 10 qui traverse l'alésage central du rouet, le rouet 2 et le support 10 étant alors coaxiaux et immobiles en mouvement l'un par rapport à l'autre.In Figure 2, the polishing device according to the present invention is in the low position, which corresponds to the rest position. In a first step, the wheel 2 is fixed on the support 10, for that the wheel 2 is mounted around the shaft 12 of the support 10 which passes through the central bore of the wheel, the wheel 2 and the support 10 being then coaxial and motionless relative to each other.
Le rouet 2 vient alors en appui sur le plateau 19. La platine 14 est ensuite fixée sur l'extrémité supérieure de l'arbre 12 du support 10 et maintient serré le rouet entre le plateau 19 et la platine 14.The wheel 2 then bears on the plate 19. The plate 14 is then fixed on the upper end of the shaft 12 of the support 10 and holds the wheel tightly between the plate 19 and the plate 14.
L'agent polissant est ensuite mis en place dans la cuve 8, la quantité d'agent polissant, plus particulièrement la hauteur d'agent polissant recouvrant le rouet 2, est déterminée en fonction du polissage que l'on souhaite effectuer, notamment de la durée de celui-ci.The polishing agent is then placed in the tank 8, the amount of polishing agent, more particularly the polishing agent height covering the wheel 2, is determined as a function of the polishing that it is desired to carry out, in particular the duration of it.
Les moyens d'entraînement sont ensuite mis en route, leur commande ayant été programmée en fonction du pas de l'hélice des aubes 6 du rouet 2 à reproduire. Le premier et le deuxième moteur entraînent alors en rotation et en translation respectivement le support 10 qui déplace le rouet 2 dans la cuve 8 remplie d'agent polissant, le tube 16 coulissant de manière étanche à travers le fonds de la cuve 8, comme on peut le voir sur la figure 2.The drive means are then started up, their control having been programmed according to the pitch of the blade propeller 6 of the wheel 2 to be reproduced. The first and second motors then rotate and translate respectively the support 10 which moves the wheel 2 in the tank 8 filled with polishing agent, the tube 16 sliding in a sealed manner through the bottom of the tank 8, as one can see it in Figure 2.
La vitesse de rotation du support et le temps pendant lequel le rouet est poli sont préalablement déterminés en fonction du niveau de polissage requit, ces caractéristiques étant généralement déterminées par l'expérience. Le rouet est alors déplacé en rotation et en translation, dans l'exemple représenté il tourne dans le sens antihoraire (flèche 18) et se déplace vers le haut (flèche 20) . Tous les points du rouet 2 parcourent donc des hélices virtuelles de pas p du bas vers le haut, jusqu'à atteindre une position haute représentée sur la figure 3.The speed of rotation of the support and the time during which the wheel is polished are previously determined according to the required level of polishing, these characteristics being generally determined by experience. The wheel is then moved in rotation and in translation, in the example shown it turns counterclockwise (arrow 18) and moves upwards (arrow 20). All the points of the wheel 2 thus traverse virtual helices with pitch p from bottom to top, until reaching a high position shown in FIG.
Ensuite, la commande des premier et deuxième moteurs est inversée, le rouet tourne dans le sens horaire (flèche 18' sur la figure 2) et se déplace en translation du haut vers bas (flèche 21), tous les points du rouet parcourent les mêmes hélices mais du haut vers le bas .Then, the control of the first and second motors is reversed, the wheel rotates clockwise (arrow 18 'in Figure 2) and moves in translation from top to bottom (arrow 21), all the points of the wheel run the same propellers but from top to bottom.
Par conséquent, la direction de déplacement relatif de l'agent polissant et du rouet, plus particulièrement des parties délimitant les veines d'air est sensiblement la même que celle que l'air va parcourir dans le rouet lorsqu' il équipera le compresseur . Dans l'exemple représenté, le rouet 2 pénètre dans la cuve 8 par une extrémité inférieure de la cuve 8, mais on pourrait prévoir que le rouet pénètre dans la cuve par son extrémité supérieure et se déplace en direction de l'extrémité inférieure de la cuve. Dans ce cas, la pression exercée par les particules ne serait pas simplement la pression statique proportionnelle à la hauteur de particules, mais serait celle appliquée par le support selon une direction axiale orientée vers le fonds de la cuve. Par conséquent, le contrôle de cette pression serait plus complexe que dans l'exemple représenté. On peut également prévoir d'imprimer aux agents polissants un mouvement, par exemple un mouvement de vibration, pour cela il peut être prévu des moyens aptes à mettre la cuve en vibration. Le procédé selon la présente invention permet de polir tout type de rouet, quelles que soient leurs dimensions.Consequently, the direction of relative displacement of the polishing agent and the spinning wheel, more particularly the portions delimiting the air veins, is substantially the same as that which the air will travel in the wheel when it equips the compressor. In the example shown, the wheel 2 enters the tank 8 through a lower end of the tank 8, but it could be expected that the impeller enters the tank at its upper end and moves towards the lower end of the tank. tank. In this case, the pressure exerted by the particles would not be simply the static pressure proportional to the height of particles, but would be that applied by the support in an axial direction oriented towards the bottom of the tank. Therefore, the control of this pressure would be more complex than in the example shown. It is also possible to impart to the polishing agents a movement, for example a vibration movement, for this it may be provided means adapted to put the tank in vibration. The method according to the present invention makes it possible to polish any type of wheel, whatever their dimensions.
En outre, le polissage suivant le procédé de l'invention peut être facilement automatisé, il ne nécessite pas d'intervention humaine pendant le polissage. Il est en outre simple et robuste.In addition, polishing according to the method of the invention can be easily automated, it does not require human intervention during polishing. It is also simple and robust.
De plus, ce procédé s'applique à tous les matériaux en choisissant l'abrasif adapté. In addition, this method applies to all materials by choosing the appropriate abrasive.

Claims

REVENDICATIONS
1. Procédé de polissage d'un disque (2) muni d'un aubage, 1 ' aubage comportant une pluralité de pales (6) définissant deux à deux une veine d'air ayant sensiblement un profil général en forme de portion d'hélice de pas p, ledit disque (2) étant immergé dans un lit d'agent polissant, ledit procédé comportant au moins : - une étape A de déplacement dudit disque1. A method of polishing a disk (2) provided with a vane, the vane comprising a plurality of blades (6) defining in pairs an air stream having substantially a general profile in the form of a helix portion p step, said disk (2) being immersed in a bed of polishing agent, said method comprising at least: a step A of moving said disk
(2) dans un premier sens de rotation autour de l'axe longitudinal (X) du disque (2) et dans un premier sens de translation le long dudit axe longitudinal (X) simultanément, de sorte que le parcours de chacun des points dudit disque (2) soit au moins une portion d'une hélice dont le pas est proche du pas p de l'hélice dont est issue la forme générale des veines d'air.(2) in a first direction of rotation about the longitudinal axis (X) of the disk (2) and in a first direction of translation along said longitudinal axis (X) simultaneously, so that the path of each of the points of said disk (2) is at least a portion of a helix whose pitch is close to the pitch p of the helix which is derived from the general shape of the air veins.
2. Procédé de polissage selon la revendication 1, comportant au moins : une étape B ultérieure à l'étape A de déplacement en rotation autour de l'axe longitudinal2. polishing method according to claim 1, comprising at least: a step B subsequent to the step A of displacement in rotation about the longitudinal axis
(X) du disque (2) dans un deuxième sens opposé au premier sens et de déplacement en translation le long dudit axe longitudinal (X) dans un deuxième sens opposé au premier sens simultanément de sorte que tous les points du disque (2) parcourent respectivement les mêmes hélices qu'à l'étape A mais dans en sens opposé. (X) of the disk (2) in a second direction opposite to the first direction and translational movement along said longitudinal axis (X) in a second direction opposite to the first direction simultaneously so that all the points of the disk (2) traverse respectively the same propellers as in step A but in the opposite direction.
3. Procédé de polissage selon la revendication 2, dans lequel les étapes A et B sont répétées alternativement.The polishing method according to claim 2, wherein steps A and B are repeated alternately.
4. Procédé de polissage selon l'une des revendications 1 à 3, dans lequel la vitesse de rotation du rouet et la vitesse de translation du rouet sont reliées par un coefficient de proportionnalité calculé en fonction de la tangente de la portion d'hélice dont est issue la forme générale des veines d' air .4. Polishing method according to one of claims 1 to 3, wherein the rotational speed of the impeller and the speed of translation of the impeller are connected by a coefficient of proportionality calculated according to the tangent of the propeller portion of which is the general shape of the air veins.
5. Procédé de polissage selon l'une des revendications précédentes, comportant une étape C, préalable à l'étape A, de détermination de la pression statique à appliquer au disque (2) et de mise en place d'une quantité d'agent polissant donnée en fonction de la pression statique déterminée précédemment au-dessus dudit disque (2) .5. Polishing method according to one of the preceding claims, comprising a step C, prior to step A, of determining the static pressure to be applied to the disk (2) and of setting up a quantity of agent. polishing given according to the static pressure previously determined above said disk (2).
6. Procédé de polissage selon l'une des revendications précédentes, dans lequel l'agent polissant comporte aux moins des particules solides, de formes appropriées à la circulation entre les aubages du rouet.6. Polishing method according to one of the preceding claims, wherein the polishing agent comprises at least solid particles, shapes suitable for circulation between the rotor blades.
7. Procédé de polissage selon l'une des revendications précédentes, dans lequel l'agent polissant est mélangé avec de l'eau, avec un acide adapté au matériau du disque à polir ou être mélangé à un média de sorte à former une pâte. Polishing method according to one of the preceding claims, wherein the polishing agent is mixed with water, with an acid adapted to the material of the disc to be polished or mixed with a medium so as to form a paste.
8. Procédé de polissage selon l'une des revendications précédentes, le disque (2) muni d'un aubage étant un rouet centrifuge pour un compresseur de turbomachine .8. Polishing method according to one of the preceding claims, the disc (2) provided with a blade being a centrifugal wheel for a turbomachine compressor.
9. Dispositif de polissage comportant une cuve (8) destinée à être remplie d'agent polissant, un support (10) de disque (2) muni d'un aubage, 1 ' aubage comportant une pluralité d'aubes définissant deux à deux une veine d'air ayant sensiblement un profil général en forme de portion d'hélice de pas p, et des moyens d'entraînement entraînant en rotation le support autour de son axe longitudinal et en translation le long dudit axe longitudinal simultanément de sorte à faire parcourir à chaque point du support (10) au moins une portion d'hélice dont le pas est proche du pas p de l'hélice dont est issue la forme générale des veines d'air du disque (2) à polir.9. Polishing device comprising a tank (8) intended to be filled with polishing agent, a support (10) of disk (2) provided with a vane, one vane comprising a plurality of vanes defining two by two a air stream substantially having a general profile in the form of a pitch helix portion p, and drive means rotating the support about its longitudinal axis and in translation along said longitudinal axis simultaneously so as to make travel at each point of the support (10) at least a portion of helix whose pitch is close to the pitch p of the helix from which is derived the general shape of the air veins of the disc (2) to be polished.
10. Dispositif de polissage selon la revendication précédente, dans lequel le support (10) comporte un arbre (12) d'axe longitudinal (Xl) sur lequel le disque (2) à polir est destiné à être fixé de manière coaxiale, et dans lequel la cuve (8) comporte un fond muni d'une ouverture (11) traversée par ledit arbre (12) du support (10), le dispositif comportant également des moyens d'étanchéité entre le fond de la cuve (8) et le disque (2) . 10. Polishing device according to the preceding claim, wherein the support (10) comprises a shaft (12) of longitudinal axis (Xl) on which the disk (2) to be polished is intended to be fixed coaxially, and in wherein the tank (8) has a bottom provided with an opening (11) traversed by said shaft (12) of the support (10), the device also comprising sealing means between the bottom of the tank (8) and the disc (2).
11. Dispositif de polissage selon la revendication précédente, dans lequel les moyens d'étanchéité comportent un tube (16) apte à coulisser dans ladite ouverture (11) selon une direction longitudinale (Xl) de manière étanche, un plateau (19) sur lequel le disque (2) est destiné à être monté, ledit plateau (19) étant fixé sur un extrémité longitudinale (16.1) du tube (16) pénétrant dans la cuve (8), ledit tube (16) ayant un diamètre extérieur sensiblement égal au diamètre extérieur de la partie du disque (2) en appui sur le tube (16) et au diamètre de l'ouverture (11) pratiquée dans le fond de la cuve (8) .11. Polishing device according to the preceding claim, wherein the sealing means comprise a tube (16) slidable in said opening (11) in a longitudinal direction (Xl) sealingly, a plate (19) on which the disk (2) is intended to be mounted, said plate (19) being fixed on a longitudinal end (16.1) of the tube (16) penetrating into the tank (8), said tube (16) having an outside diameter substantially equal to outer diameter of the portion of the disk (2) resting on the tube (16) and the diameter of the opening (11) formed in the bottom of the tank (8).
12. Dispositif de polissage selon la revendication 11, dans lequel la face du plateau (19) destinée à être en contact avec le disque comporte une rainure annulaire (21) recevant un joint d'étanchéité destiné venir en contact avec le disque et à empêcher la pénétration de l'agent polissant entre le disque et le plateau.Polishing device according to claim 11, wherein the face of the plate (19) intended to be in contact with the disc comprises an annular groove (21) receiving a seal intended to come into contact with the disc and to prevent penetration of the polishing agent between the disc and the tray.
13. Dispositif selon la revendication 11 ou 12, comportant des moyens de maintien du disque sur le support, ledit disque étant destiné à être maintenu par serrage entre une platine (14) fixée sur une extrémité libre de l'arbre (12) du support (10) et le plateau (19) .13. Device according to claim 11 or 12, comprising means for holding the disk on the support, said disk being intended to be held by clamping between a plate (14) fixed on a free end of the shaft (12) of the support (10) and the plate (19).
14. Dispositif de polissage selon l'une des revendications 11 à 13, comportant un joint d'étanchéité (17) entre la cuve (8) et le tube (16), du type joint torique ou joint à lèvre. 14. Polishing device according to one of claims 11 to 13, comprising a seal (17) between the vessel (8) and the tube (16) of the O-ring type or lip seal.
15. Dispositif selon l'une des revendications 11 à 14, dans lequel le diamètre du tube (16) est sensiblement égal au diamètre du disque du côté de son bord de fuite.15. Device according to one of claims 11 to 14, wherein the diameter of the tube (16) is substantially equal to the diameter of the disk on the side of its trailing edge.
16. Dispositif de polissage selon l'une des revendication 9 à 15, dans lequel les moyens d'entraînement comportent un premier moteur destiné à entraîner le support (10) en rotation autour de son longitudinal (Xl) et un deuxième moteur destiné à entraîner le support en translation le long dudit axe longitudinal (Xl), le premier moteur étant apte à entraîner en rotation dans un premier sens et dans un deuxième sens opposé au premier sens de manière alternative, et le deuxième moteur étant apte à entraîner en translation dans un premier sens de translation et dans un deuxième sens de translation opposée au premier sens de manière alternative.16. Polishing device according to one of claims 9 to 15, wherein the drive means comprise a first motor for driving the support (10) in rotation about its longitudinal (Xl) and a second motor for driving. the support in translation along said longitudinal axis (Xl), the first motor being able to drive in rotation in a first direction and in a second direction opposite to the first direction alternatively, and the second motor being able to drive in translation in a first direction of translation and in a second direction of translation opposite the first direction alternatively.
17. Dispositif de polissage selon l'une des revendications 9 à 16, le disque (2) muni d'un aubage étant un rouet centrifuge de compresseur pour turbomachine . 17. A polishing device according to one of claims 9 to 16, the disk (2) provided with a blade being a turbomachine compressor centrifugal wheel.
EP09809337.0A 2008-08-29 2009-08-26 Method of polishing bladed disks (blisks) for a turbomachine and polishing device Active EP2323807B1 (en)

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FR0855808A FR2935280B1 (en) 2008-08-29 2008-08-29 METHOD FOR POLISHING DISCS WITH A TURBOMACHINE BLEEDING AND POLISHING DEVICE.
PCT/EP2009/061004 WO2010023226A1 (en) 2008-08-29 2009-08-26 Method of polishing bladed disks (blisks) for a turbomachine and polishing device

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CN102137736A (en) 2011-07-27
EP2323807B1 (en) 2014-06-25
BRPI0917688A2 (en) 2015-12-01
JP5744734B2 (en) 2015-07-08
US8657647B2 (en) 2014-02-25
CA2734526C (en) 2016-09-13
CN102137736B (en) 2014-07-16
FR2935280A1 (en) 2010-03-05
WO2010023226A1 (en) 2010-03-04
CA2734526A1 (en) 2010-03-04
RU2011111393A (en) 2012-10-10
BRPI0917688B1 (en) 2020-11-10
RU2501641C2 (en) 2013-12-20
US20110256809A1 (en) 2011-10-20
JP2012500730A (en) 2012-01-12
FR2935280B1 (en) 2011-12-09

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