EP4115052A1 - Procédé pour remboiter des talons d'aubes d'une roue de rotor dans une turbomachine d'aéronef - Google Patents
Procédé pour remboiter des talons d'aubes d'une roue de rotor dans une turbomachine d'aéronefInfo
- Publication number
- EP4115052A1 EP4115052A1 EP21713729.8A EP21713729A EP4115052A1 EP 4115052 A1 EP4115052 A1 EP 4115052A1 EP 21713729 A EP21713729 A EP 21713729A EP 4115052 A1 EP4115052 A1 EP 4115052A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- endoscope
- heel
- blades
- turbomachine
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
-
- 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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- 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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/16—Form or construction for counteracting blade vibration
-
- 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
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- 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
- F05D2230/80—Repairing, retrofitting or upgrading methods
-
- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/24—Rotors for 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
- F05D2260/00—Function
- F05D2260/80—Diagnostics
Definitions
- TITLE PROCEDURE FOR REMOTING BLADDER HEADS FROM A ROTOR WHEEL IN AN AIRCRAFT TURBOMACHINE
- the present invention relates to a method for relocating blade stubs from a rotor wheel in an aircraft turbomachine, as well as to a re-nesting device for implementing such a method.
- an axial turbine of a turbomachine is composed of a succession of axial stages (along the axis of circulation of the gas flows) arranged at the same time. one behind the other.
- Each stage comprises a movable bladed wheel forming the rotor and a bladed distributor forming the stator.
- the movable wheel is rotated vis-à-vis the corresponding distributor.
- the upstream and downstream are defined with respect to the normal flow direction of the air flows (from upstream to downstream) through the turbomachine.
- the term “axis of the turbomachine” is used to refer to the axis of rotation of the main rotor of the turbomachine.
- the axial direction corresponds to the direction of the axis of the turbomachine, and a radial direction is a direction perpendicular to the axis of the turbomachine and intersecting this axis.
- an axial plane is a plane containing the axis of the turbomachine, and a radial plane is a plane perpendicular to this axis.
- a turbomachine blade comprises a blade extending along the stacking axis of the blade, between the proximal and distal (ie, inner and outer) ends of the blade.
- the movable wheel conventionally consists of an annular disc centered on the axis of rotation of the wheel, on which a plurality of blades are attached.
- An example of a blade is shown in FIG. 1.
- a blade of this type is described in patent document FR-A1-3 079 847.
- This blade 10 comprises a blade 16 extending along the stacking axis X of the vane, between the proximal 10A and distal 10B ends of the vane 10. At its proximal end 10A, the vane comprises a platform 19 and a foot 12 by which it is fixed to the disc (not shown). At its distal end 10B, the blade 10 has a heel 14.
- the heel 14 comprises a platform 20 outwardly delimiting the flow stream of the gas circulating between the blades 16, and having side edges 21, 22 opposite.
- the platform 20 comprises an upstream part 24 called “upstream spoiler” and a downstream part 28 called “downstream spoiler”.
- the heel 14 also comprises upstream 31 and downstream 32 sealing wipers extending radially outward from the outer face of the platform 20.
- Each of the lateral edges 21, 22 of the platform has, between the upstream wipers 31 and downstream 32, a substantially “U” profile. In the case of other blades, this profile can take the form of a “Z” or a “V”, for example.
- the blades 10 are mounted on their disc with a torsional stress about a torsion axis positioned relative to to the stacking axis X.
- the geometry of the heels 14 is such that each blade 10 is put under torsional stress by pressing on the neighboring blades 10 at the level of the lateral edges 21 and 22.
- These lateral edges 21, 22 therefore define inter-blade contact surfaces and are the site of significant friction during operation of the turbomachine.
- the invention thus proposes a method for re-fitting the heels of blades of a rotor wheel in an aircraft turbomachine, the rotor wheel comprising a disc carrying blades which each comprise a blade extending between a root and a blade. heel, the heel of each vane having side edges comprising complementary shapes to the side edges of the heels of adjacent vanes, the side edges of the heels being nested within each other such that antiwear coatings of these edges contact each other in one position desired interlocking, and at least one of the side edges of at least one of the heels can be dislocated from the side edge of an adjacent heel in an undesired dislocation position.
- the method comprises, when such an unwanted dislocation position is detected, a step of inserting a re-nesting device into the turbomachine, and a step of moving said at least one bead to bring it. from this unwanted position to the desired nesting position by leaning on and exerting a force on the blade or each blade whose heel is dislocated.
- the method according to the invention makes it possible to replace the disengaged mobile blade (s) directly under the wing, without requiring the engine or the turbine to be dismantled from the turbomachine. In this way, it is possible to avoid early removal or dynamic failure of the part and therefore of the engine or turbine.
- the method according to the invention therefore makes it possible to maximize and optimize the use of the motor, while ensuring healthier operation of the blades.
- Such a method also allows a reduction in costs (the number of parts to be changed being reduced due to the maximization of the use of the parts as well as the reduction of anticipated turbine removals), as well as a reduction in the number of parts. repairs to be carried out in maintenance operations.
- the method according to the invention may include one or more of the following characteristics, taken in isolation from each other or in combination with each other:
- the repositioning device comprises an endoscope; the repositioning device is inserted through an endoscopy orifice of the turbomachine or through the rear or downstream of the turbomachine;
- the repositioning device comprises an endoscope comprising lighting and viewing means as well as clamps or hooks configured to cooperate with the blade or the heel of a blade to perform the displacement step;
- the clamps or hooks are retractable and / or movable relative to each other and / or relative to the endoscope;
- the endoscope comprises clamps which are each configured to grip a leading edge and / or a trailing edge of the blade, or even also of an adjacent blade, during the displacement step;
- the endoscope has a first clamp configured to grip a leading edge of the blade, and a second clamp oriented in a direction different from that of the first clamp and configured to grip a trailing edge of an adjacent blade;
- the endoscope comprises hooks which are each configured to cooperate with a spoiler of a heel and / or a leading or trailing edge of the blade, or even also of an adjacent blade, during the displacement step ;
- the endoscope has a first hook mounted to slide in relation to a second fixed hook of the endoscope
- the endoscope comprises an organ, for example in the form of a roller, this organ being movable in rotation about an axis, the method comprising the engagement of the organ between two adjacent blades and the rotation of the organ around said organ axis during the displacement step so that the member bears on the two blades and urges them in substantially opposite directions;
- the endoscope comprises an inflatable member, the method comprising the engagement of the organ between two adjacent blades and the inflation of the organ during the displacement step so that the organ takes up support on the two blades and urge them in substantially opposite directions.
- the present invention also relates to a repositioning device for implementing the method as described above, in which it comprises an endoscope comprising lighting and display means as well as at least one of the elements chosen from:
- a movable or inflatable member configured to be engaged between two adjacent blades and to urge them in substantially opposite directions.
- Figure 1 is a schematic perspective view of a turbine wheel blade
- Figure 2 is a schematic view on a larger scale of a heel of a turbine wheel blade
- Figure 3 is a very schematic perspective view of a turbine engine blade blade
- Figure 4 is a schematic perspective view of the distal end of a repositioning device according to a first embodiment of the invention, in the deployed position,
- Figure 5 is a schematic perspective view of the distal end of the repositioning device of Figure 4, in the stored position,
- FIG. 6 is a side view of the distal end of a repositioning device according to a second embodiment of the invention, the distal end comprising two hooks according to a first variant embodiment
- Figure 7 is a sectional view, taken along a sectional plane AA, of the distal end of the repositioning device of Figure 6,
- Figure 8 is a schematic view of the distal end of the repositioning device of Figure 6,
- Figure 9 is a view similar to that of Figure 6, the distal end comprising two hooks according to a second variant embodiment
- Figure 10 is a view similar to that of Figure 8, the distal end comprising two hooks according to a third variant embodiment
- FIG. 11 is a perspective view from below of first means for transmitting a mechanical force between the two hooks of the repositioning device according to the second embodiment of the invention, the first means comprising a cable,
- FIG. 12 is a vertical sectional view, taken at the level of the fixing of the cable, of one of the two hooks of FIG. 11,
- Figure 13 is a vertical sectional view of second means for transmitting a mechanical force between the two hooks of the repositioning device according to the second embodiment of the invention
- FIG. 14 is a schematic perspective view of the distal end of a repositioning device according to a third embodiment of the invention, in the position of insertion between two rotor blades
- FIG. 15 is a schematic perspective view of the distal end of the repositioning device of FIG. 14, in the position of repositioning of the heel of one of the blades, and
- Figure 16 is a perspective view of the distal end of a repositioning device according to a fourth embodiment of the invention.
- the invention relates to a method and a device 40 for repositioning heels 14 of blades 10 of a turbomachine movable wheel.
- a movable wheel (not visible in the figures) forms the rotor of the axial turbine of the turbomachine, and conventionally consists of an annular disc centered on the axis of rotation of the wheel, on which the blades 10 are fixed.
- Such a blade 10 is visible in FIG. 1.
- the blade 10 comprises a blade 16 extending along the stacking axis X of the blade, between the proximal 10A and distal 10B ends of the blade 10.
- the blade At its proximal end 10A, the blade comprises a platform 19 and a foot 12 by which it is fixed to the disc (not shown).
- the blade 10 At its distal end 10B, the blade 10 has the heel 14.
- their heels 14 are arranged edge to edge so as to form a circumferential crown defining a surface of revolution around the axis. Has wheel rotation.
- the particular function of this ring is to delimit the outer surface of the flow path of the gas flows circulating between the blades 16 and to limit gas leaks at the distal end 10B of the blades 10.
- the heel 14 comprises a platform 20 outwardly delimiting the flow stream of the gas circulating between the blades 16, and having side edges 21, 22 opposite.
- the platform 20 comprises an upstream part 24 called “upstream spoiler” and a downstream part 28 called “downstream spoiler”.
- the heel 14 also comprises upstream 31 and downstream 32 sealing wipers extending radially outward from the outer face of the platform 20.
- Each of the lateral edges 21, 22 of the platform has, between the upstream wipers 31 and downstream 32, a substantially “U” profile. In the case of other blades, this profile can take the form of a “Z” or a “V”, for example.
- the blades 10 are mounted on their disc with a torsional stress about a torsion axis positioned relative to to the stacking axis X.
- the geometry of the heels 14 is such that each vane 10 is put under torsional stress by bearing on the adjacent blades 10 at the level of the lateral edges 21 and 22.
- the lateral edges 21, 22 of each blade 10, which comprise shapes complementary to the lateral edges 22, 21 of the heels 14 of the adjacent blades 10, therefore define surfaces of inter-blade contact and are the site of significant friction during operation of the turbomachine. To be protected against wear, these edges are provided with a coating of anti-wear material resistant to friction. It may, for example, be a material marketed under the trademark Stellite®. This coating 36 is visible in Figure 2.
- this anti-wear coating 36 is deposited on the side edges 21, 22 by welding, for example by drop welding, involving the creation of an electric arc for the melting of the material. This is often a manual operation, the Stellite® type alloy being in the form of a liquid drop during deposition.
- Stellite® alloy is a steel alloy with a high chromium (Cr) and cobalt (Co) content. It may also contain a small amount of tungsten (W) or molybdenum (Mo) and a small amount of carbon (C). Stellite® alloy is not forgeable and must be either cast or welded to an object of which it forms a part or to which it is inserted.
- the side edges 21, 22 of the heels 14 are interlocked with each other so that the wear-resistant coverings 36 of the edges 21, 22 are in contact with each other in a desired interlocking position.
- the vanes 10 may be subject to interference linked to the other parts and at least one of the vanes 10 may thus not return to its initial assembled position. This can cause loss of contact between adjacent side edges 21, 22. Such a loss of contact and the play appearing as a result between the heels 14 can cause the disengagement of a blade, that is to say that the male and female faces which must be in contact are no longer in contact with a blade. axial offset of the heel of the blade. For the remainder of the description, it will be assumed that the heel 14A of a blade 10A (shown in Figures 14 and 15) is dislocated from its normal nesting position.
- Figure 3 shows the leading 26a and trailing 26b edges of a blade 26.
- the references CR10, CR50 and CR90 in FIG. 3 denote heights in the gas flow stream in which the blade 26 is intended to extend.
- CR50 denotes the mid-height of the stream and therefore is situated on a centered circumference. on the axis of revolution of the vein and located midway between the external and internal peripheries of the vein.
- CR10 is located on a circumference centered on the axis of revolution of the vein and located at 10% of the height of the vein, measured from its inner periphery.
- CR90 is located on a circumference centered on the axis of revolution of the vein and located at 90% of the vein height, measured from its inner periphery.
- the repositioning device 40 includes an endoscope 42.
- Figures 4 and 5 illustrate a first embodiment of the endoscope 42 according to the invention.
- the endoscope 42 has a generally elongated shape and is preferably flexible. It comprises a proximal end located on the operator's side, and a distal end which must be located as close as possible to the blade to be re-fitted, only this distal end being shown in the drawings. This distal end comprises a head 46.
- the endoscope 42 is equipped with optical illumination and display elements, such as a first optical fiber of which a proximal end is connected to a camera and of which a distal end 48a opens onto at least one lens, for example at the level of the head 46, and a second optical fiber of which a proximal end is connected to a light source and a distal end 48b opens at the level of the head 46.
- optical illumination and display elements such as a first optical fiber of which a proximal end is connected to a camera and of which a distal end 48a opens onto at least one lens, for example at the level of the head 46, and a second optical fiber of which a proximal end is connected to a light source and a distal end 48b opens at the level of the head 46.
- the head 46 is located at one end of a body 50 of the endoscope 42.
- This body 50 has a generally tubular shape and serves in particular to support the positioning clamps 52, 54.
- the endoscope 42 comprises two positioning clamps 52, 54.
- the two positioning clamps 52, 54 are oriented inversely with respect to the direction of extension of the body 50.
- the grippers 52, 54 have jaws 56 or fixed jaws.
- the clamps 52, 54 each have a general V shape, the angle between the jaws 56 of which is determined so that the clamps can be engaged on the leading edge 26a or trailing edge 26b of a blade. More specifically, a first clamp 52 is configured to grip the leading edge 26a of a blade, while the second clamp 54 is configured to grip the trailing edge 26b of an adjacent blade, or vice versa.
- the clamps 52, 54 have free ends which are advantageously each equipped with a contact element which is preferably made of a material which is not liable to damage the blade during contact. This is, for example, PTFE or any other plastic material, or even Teflon.
- the clamps 52, 54 are each carried by a separate retractable arm 58, 60.
- Each retractable arm 58, 60 has a rectilinear shape and comprises a longitudinal end 58a, 60a articulated on the head 46 or the body 50, and an opposite longitudinal end 58b, 60b where the corresponding clamp 52, 54 is located.
- Each clamp 52, 54 can be formed in one piece with its corresponding arm 58, 60, but can also be movable along the arm 58, 60 in order to allow the adjustment of its position to best adapt to each blade. . They extend in an opposite direction, substantially parallel to the direction of extension of the body 50. The jaws 56 of each clamp 52, 54 are located in planes parallel to each other.
- Each arm 58, 60 is movable from a deployed position shown in Figure 4, in which it extends substantially perpendicular to the direction of extension of the body 50, to a storage position, shown in Figure 5, in which it extends parallel to this direction of extension and along the body 50.
- each arm 58, 60 is here provided by two corresponding rods 62, 64.
- Each first rod 62 extends along the direction extension of the body 50 and comprises a longitudinal end articulated on the end 60a of the arm 60, and an opposite longitudinal end connected to a traction member accessible by the user or controlled by the user, from the proximal end of the endoscope 42.
- a traction member is for example a jack (not shown in the drawings).
- Each second rod 64 extends obliquely between a first rod 62 and the corresponding arm 58, 60, and comprises a longitudinal end articulated on the end 60b of the arm, and an opposite longitudinal end articulated on the rod 62, in the vicinity of its end connected to the traction member.
- the distance between the clamps 52, 54 corresponds to the distance between CR10 and CR90.
- the endoscope 42 may be inserted in a first stage through an endoscopy port in the turbomachine, or through the rear or downstream of the latter in the case of rear stages.
- the endoscope 42 can be used in the following way during a second step: a first clamp 52 is used to block the leading edge 26a of the blade of the dislocated blade. in CR10, while the second clamp 54 makes it possible to pull or push the trailing edge 26b of an adjacent blade in CR90, in order to relocate the heel of the dislocated blade.
- the heel is moved via the joint action of the clamps 52, 54, in order to bring it from its dislocated position to a desired interlocking position.
- Figures 6 to 13 illustrate a second embodiment of the endoscope 42 according to the invention.
- the endoscope 42 has a generally elongated shape and preferably cylindrical.
- the endoscope 42 comprises a proximal end located on the operator's side, and a distal end which must be located as close as possible to the blade to be re-fitted, only this distal end being shown in the drawings.
- This distal end comprises hooks 66.
- the endoscope 42 further comprises means 68, 70, 72, 74, 76, 78 for transmitting a generally axial mechanical force (along the motor axis) between the hooks 66.
- the distal end of the endoscope 42 comprises two hooks 66.
- Each of the hooks 66 is configured to rest on a spoiler 24, 28 of a heel 14, or a leading edge 26a or trailing edge 26b of a blade.
- the hooks 66 are surface coated with a material which is not liable to damage the blades 16 upon contact. This is, for example, PTFE or any other plastic material, or even Teflon.
- the two hooks 66 extend in the same plane and are oriented in the same direction with respect to the direction of extension of the body of the endoscope 42.
- the two hooks 66 are configured to bear on respective spoilers 24, 28 of two heels of adjacent blades 10, of which the blade 10a comprising the dislocated heel 14a, and thus exert a generally axial force in the upper part on these two blades. More precisely, a first hook 66a is configured to bear on the upstream spoiler 24 of the dislocated heel 14a, and a second hook 66b is configured to bear on the downstream spoiler 28 of the heel of an adjacent vane, or vice versa.
- Such a first variant embodiment is particularly suitable for a slightly inclined gas flow stream.
- the two hooks 66 extend in the same plane and are oriented in opposite directions with respect to the direction of extension of the body of the endoscope 42.
- a first hook 66a is configured to rest on the leading edge of the blade of the dislocated vane
- a second hook 66b is configured to rest on the trailing edge of the blade of an adjacent vane, or vice versa.
- the two hooks 66 extend in substantially perpendicular planes.
- the two hooks 66 are thus offset by a quarter of a turn relative to the direction of extension of the body of the endoscope 42.
- a first hook 66a is configured to bear on the upstream spoiler 24 of the dislocated heel. 14a
- a second hook 66b is configured to bear on the trailing edge 26b of the blade of an adjacent vane 10, or vice versa.
- Such a third variant embodiment is particularly suitable for a strongly inclined gas flow stream.
- one of the two hooks 66 for example the first hook 66a, has a profile in the form of a half-moon. This makes it possible to guarantee the respective angular position of the two hooks 66.
- one of the two hooks 66a, 66b is slidably mounted relative to the other hook 66b, 66a which is fixed to it relative to the body of the endoscope 42.
- the means for transmitting an axial force between the hooks comprise a cable 68.
- the means for transmitting an axial force also comprise a spring 70 compressed resting on the hooks 66.
- Such a spring 70 which is visible in FIG. 12, makes it possible to keep the hooks 66 in the free state in the open position, when the endoscope 42 is inserted into the turbomachine.
- the cable 68 is fixed by one of its ends to the slidably mounted hook and is intended to be actuated by an operator of the endoscope 42, in order to exert the overall axial force between the two hooks 66.
- the cable 68 is fixed to the first hook 66a via a flat support, typically via a slider 72 provided on the first hook 66a.
- the means for transmitting an axial force between the hooks comprise an electric motor 74, a helical screw 76, and a rack 78.
- the electric motor 74 is integral with one of the two hooks, for example the second hook 66b in the example shown (this second hook 66b being the fixed hook in this exemplary embodiment).
- the rack 78 is fixed to the other hook, for example to the first hook 66a in the example shown.
- the helical screw 76 connects the electric motor 74 to the rack 78, and thus allows the axial translational movement of the first hook 66a relative to the second hook 66b.
- the endoscope 42 may be inserted in a first stage through an endoscopy port in the turbomachine, or through the rear or downstream of the latter in the case of rear stages.
- the hooks 66 are positioned so as to rest on a spoiler 24, 28 of the dislocated heel 14a, or a leading edge 26a or trailing edge 26b of a blade.
- the endoscope 42 can be used as follows during a second step: a generally axial mechanical force is applied to the hooks 66, and therefore to the blades 10 adjacent on which the hooks 66 are positioned, via the means 68, 70, 72, 74, 76, 78.
- the dislocated heel 14a is moved via the joint action of the hooks 66, in order to to bring it from its dislocated position to a desired nesting position.
- Figures 14 and 15 illustrate a third embodiment of the endoscope 42 according to the invention.
- the endoscope 42 includes a proximal end located on the operator's side, and a distal end which must be located as close as possible to the blade 10A to be repositioned, only this distal end being shown in the drawings.
- This distal end comprises a member 86 movable in rotation about an X axis.
- the member 86 is in the form of a roller.
- the endoscope 42 also comprises lighting and viewing means, such as for example a light source and a camera, such means not being shown in FIGS. 14 and 15 for reasons of clarity.
- the endoscope 42 also includes means for rotating the member 86 about its axis X.
- Such rotating means consist for example of a braided cable system connecting the endoscope.
- organ 86 has a crank opposite to it. In this case, the rotation of the member 86 around its axis X is carried out manually by an operator, via the crank.
- the rotating means may comprise an electric motor, either connected directly to the member 86 by a spline system, or offset and connected to a braided cable. In this case, the rotation of the member 86 about its axis X is effected electrically via the motor.
- the rotating means may comprise a centrifugal impeller system connected to the member 86, and to which an air pressure is applied. In the latter case, the rotation of the member 86 about its axis X is carried out pneumatically.
- the member 86 is preferably made of a material which is not liable to damage the blades 16 during contact. It is for example PTFE or any other plastic material, or even Teflon.
- the member 86 When the member 86 is in the form of a roller, the latter has a substantially elliptical shape, which is defined as a function of the stage of the turbomachine in which the roller is to be used.
- the roller 86 has an elliptical shape, the small width of which is substantially equal to 7 mm, and the large width of which is between 15 mm and 30 mm.
- the dimensions of the roller 86 are also chosen so as to be compatible with the dimensions of the endoscopy orifice of the turbomachine.
- the endoscope 42 can be inserted during a first step through an endoscopy orifice of the turbomachine, or else through the rear or downstream of the latter in the case of rear stages.
- the roller 86 is positioned in its small width between two adjacent blades 16 of two blades 10, including the blade 10A comprising the dislocated heel 14A.
- a mechanical force is applied by the roller 86 on the two blades 16 during its insertion, via the endoscope 42, so as to separate the two corresponding blades 10.
- the endoscope 42 can be used in the following way during a second step: the roller 86 is rotated around its axis X by the rotating means so as to push the two blades 16 to pass its great width.
- the roller 86 thus bears on the two blades 16 and urges them in substantially opposite directions D1, D2.
- This movement of the roller 86 makes it possible to move the two corresponding vanes 10 in a tangential direction, which gives the dislocated vane 10A more freedom to return to the normal position.
- the heel 14A is moved via the action of the member 86, in order to bring it from its dislocated position to a desired interlocking position.
- Figure 16 illustrates a fourth embodiment of the endoscope 42 according to the invention.
- the endoscope 42 comprises a proximal end located on the operator's side, and a distal end which must be located as close as possible to the blade to be re-fitted, only this distal end being shown in FIG. 16.
- This distal end comprises a inflatable organ 88.
- the member 88 is in the form of a pneumatic cushion.
- the pneumatic cushion 88 is made of a flexible and waterproof material, such as for example rubber.
- the endoscope 42 also comprises lighting and viewing means, such as for example a light source and a camera, such means not being shown in FIG. 16 for reasons of clarity.
- the endoscope 42 also comprises air supply means intended to supply air to the inflatable member 88.
- Such means comprise, for example, an air duct 90 extending axially in the body of the endoscope 42.
- the endoscope 42 may be inserted in a first step through the rear or downstream of the turbine of the turbomachine for the rear stages.
- the inflatable member 88 is positioned between two adjacent blades of two blades, including the blade comprising the dislocated heel.
- the endoscope 42 can be used as follows in a second step: the inflatable member 88 is inflated via the air supply means. Under the pressure of the air which is blown into it, the inflatable member 88 thus comes to bear on the two adjacent blades and urges them in substantially opposite directions.
- This inflation of the member 88 makes it possible to move the two corresponding vanes in a tangential direction, which gives the dislocated vane more freedom to return to the normal position. In this way, the heel is moved via the action of the member 88, in order to bring it from its dislocated position to a desired interlocking position.
- the method and the repositioning device 40 according to the invention make it possible to reposition the heels of blades of a rotor wheel in an aircraft turbomachine, without requiring removal or disassembly of the engine or of the turbine. of the turbomachine. In this way, it is possible to avoid early removal or dynamic failure of the blades and therefore of the engine or turbine.
- the method and device according to the invention therefore make it possible to maximize and optimize the use of the motor, while ensuring healthier operation of the blades. They also allow a reduction in costs, as well as a reduction in the number of repairs to be carried out in maintenance operations.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002179A FR3107921B1 (fr) | 2020-03-04 | 2020-03-04 | Procede pour remboiter des talons d’aubes d’une roue de rotor dans une turbomachine d’aeronef |
| PCT/FR2021/050341 WO2021176168A1 (fr) | 2020-03-04 | 2021-03-01 | Procédé pour remboiter des talons d'aubes d'une roue de rotor dans une turbomachine d'aéronef |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4115052A1 true EP4115052A1 (fr) | 2023-01-11 |
| EP4115052B1 EP4115052B1 (fr) | 2025-06-04 |
Family
ID=71661979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21713729.8A Active EP4115052B1 (fr) | 2020-03-04 | 2021-03-01 | Procédé pour remboiter des talons d'aubes d'une roue de rotor dans une turbomachine d'aéronef |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11988111B2 (fr) |
| EP (1) | EP4115052B1 (fr) |
| CN (1) | CN115066538B (fr) |
| FR (1) | FR3107921B1 (fr) |
| WO (1) | WO2021176168A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12186848B1 (en) | 2024-01-26 | 2025-01-07 | General Electric Company | Method and apparatus for servicing engines |
| US12195202B1 (en) * | 2024-01-26 | 2025-01-14 | General Electric Company | System and method for servicing aircraft engines |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2612249B1 (fr) | 1987-03-12 | 1992-02-07 | Alsthom | Aubage mobile pour turbines a vapeur |
| US7179223B2 (en) * | 2002-08-06 | 2007-02-20 | Olympus Optical Co., Ltd. | Endoscope apparatus having an internal channel |
| JP4358494B2 (ja) * | 2002-10-02 | 2009-11-04 | オリンパス株式会社 | 内視鏡システム |
| EP1873355A1 (fr) * | 2006-06-27 | 2008-01-02 | Siemens Aktiengesellschaft | Aube de turbine |
| FR2950104B1 (fr) * | 2009-09-11 | 2011-12-09 | Snecma | Roue de turbomachine |
| US10265810B2 (en) * | 2015-12-03 | 2019-04-23 | General Electric Company | System and method for performing an in situ repair of an internal component of a gas turbine engine |
| EP3318716B2 (fr) * | 2016-11-04 | 2023-01-11 | General Electric Company | Installation ou dépose d'aube de turbine sur l'emplanture d'aube de turbine |
| KR101874243B1 (ko) * | 2017-03-31 | 2018-07-03 | 두산중공업 주식회사 | 버킷의 진동감쇠구조와 이를 포함하는 버킷 및 터보머신 |
| EP3434864B1 (fr) * | 2017-07-27 | 2020-12-16 | General Electric Company | Procédé et système de réparation d'une turbomachine |
| FR3079847B1 (fr) | 2018-04-10 | 2023-11-10 | Safran Aircraft Engines | Procede de fabrication d'un element aubage metallique d'une turbomachine d'aeronef |
-
2020
- 2020-03-04 FR FR2002179A patent/FR3107921B1/fr active Active
-
2021
- 2021-03-01 WO PCT/FR2021/050341 patent/WO2021176168A1/fr not_active Ceased
- 2021-03-01 EP EP21713729.8A patent/EP4115052B1/fr active Active
- 2021-03-01 CN CN202180013583.XA patent/CN115066538B/zh active Active
- 2021-03-01 US US17/796,305 patent/US11988111B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021176168A1 (fr) | 2021-09-10 |
| FR3107921B1 (fr) | 2022-08-05 |
| US20230091418A1 (en) | 2023-03-23 |
| FR3107921A1 (fr) | 2021-09-10 |
| EP4115052B1 (fr) | 2025-06-04 |
| CN115066538A (zh) | 2022-09-16 |
| CN115066538B (zh) | 2025-08-22 |
| US11988111B2 (en) | 2024-05-21 |
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