EP1760258A2 - Locking appartus for an axial retention ring of a blade - Google Patents

Locking appartus for an axial retention ring of a blade Download PDF

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Publication number
EP1760258A2
EP1760258A2 EP06119579A EP06119579A EP1760258A2 EP 1760258 A2 EP1760258 A2 EP 1760258A2 EP 06119579 A EP06119579 A EP 06119579A EP 06119579 A EP06119579 A EP 06119579A EP 1760258 A2 EP1760258 A2 EP 1760258A2
Authority
EP
European Patent Office
Prior art keywords
hook
immobilization
slot
ring
cleat
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
EP06119579A
Other languages
German (de)
French (fr)
Other versions
EP1760258B1 (en
EP1760258A3 (en
Inventor
Erick Jacques Boston
Alain Marc Lucien Bromann
Pierre Debeneix
Frédéric Paul Eichstadt
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 EP1760258A2 publication Critical patent/EP1760258A2/en
Publication of EP1760258A3 publication Critical patent/EP1760258A3/en
Application granted granted Critical
Publication of EP1760258B1 publication Critical patent/EP1760258B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
    • F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/326—Locking of axial insertion type blades by other means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • 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
    • F05D2260/30—Retaining components in desired mutual position

Definitions

  • the present invention relates to the technical field of rings for axial retention of the blades of a rotor of a turbomachine, in particular an aircraft engine.
  • It also relates to a retaining ring of the blades of a turbomachine rotor, and a rotor comprising such a device for immobilization in rotation.
  • turbomachine for example an aircraft engine, comprising such a device for immobilizing rotation.
  • axial refers to the axial direction of the turbomachine.
  • a turbomachine rotor is equipped with a disk and vanes carried by the disk, as well as with a retention ring to prevent movement of the vanes in the axial direction, as described in the document FR 2 729 709-A1 .
  • Figure 1 illustrates such a blade retention ring of a rotor, known from the prior art.
  • a disk 10 of a rotor has a disk body 11 and teeth 12 which extend radially from the disk body 11 and are distributed around the circumference thereof.
  • the space between two successive teeth 12 forms a cell 13 oriented axially.
  • Each tooth 12 is provided with at least one hook 6 projecting in an axial direction, which defines on this tooth an elementary groove opening radially inwards.
  • the teeth 12 are provided with an upstream hook 6 and a downstream hook 6.
  • FIG. 2 illustrates a root 14 of a blade 16 inserted into such a cell 13.
  • the two teeth 12 make it possible to contain this blade 16 circumferentially and radially.
  • a retention ring 20 is placed in a groove 22, discontinuous, which corresponds to the succession of elementary grooves.
  • the presence of the retaining ring 20 in the groove 22 makes it possible to prevent axial displacement of the blades 16.
  • the retaining ring 20 is opened by a slot 24 which separates the two ends or strands 26 thereof.
  • the slot 24 of the retaining ring 20 is located at one of the teeth 12 and not between two adjacent teeth 12, in order to prevent the ends of the retention ring 20 from coming out. of the groove 22.
  • each contact face 32 of the respective cleats 30 is in abutment against one of the lateral faces 44 of the abutment hook 60.
  • the slot 24 becomes is located under the hook stop 60 and the retaining ring 20 is prevented from rotating, so that the retaining ring 20 can not spontaneously exit the groove 22 during operation of the turbomachine. It follows that the vanes 16 can not escape from the cells 13 into which their feet 14 are inserted.
  • the present invention proposes a device for immobilization in rotation of a retention ring rotor blades of a turbomachine, which is an alternative to the prior art rotation immobilizer described above.
  • the invention relates to an immobilization device in rotation of a blade retention ring on a rotor disk of a turbomachine in a substantially axial direction of said turbomachine, said rotor disk being provided with hooks distributed around its circumference and defining a groove for receiving said retention ring, including a first and a second successive locking hooks, and said retention ring being provided with a slot, and at least one cleat disposed on one side thereof near said slot.
  • the position of said at least one stopper on said retention ring is such that, when said retention ring is in place in said groove, said at least one stop abuts against said first immobilization hook, and the slot is covered by said second immobilization hook.
  • immobilization hook covers two functions that fill one and / or the other of these two hooks: a stop function for a cleat and a recovery function of the slot.
  • said first immobilization hook is provided with a locking face on its side which is opposite the second hook.
  • said cleat of the retaining ring is provided with a contact face oriented towards its side which is opposite the opposite side of said slot, and said locking face cooperates with said contact face for a setting abutment of said cleat against said first immobilization hook.
  • the positions of said first and second tabs on the retention ring are such that, when said retention ring is in place in said groove, said first and second tabs abut against said first hook of immobilization, on each side thereof, and said slot is covered by said second immobilization hook.
  • said first immobilization hook is provided with a locking face on its side which is opposite said second immobilization hook and another locking face on its opposite side
  • said stops of said retention ring are each having a contact face, the contact face of said second cleat being on its side facing said slot, and the contact face said first cleat being on its side which is opposite its side facing said slot, and said locking faces cooperate with said contact faces for an abutment of said cleats against said first immobilization hook.
  • said first immobilization hook is provided with a locking face on its side which is opposite said second immobilizing hook
  • said second immobilizing hook is provided with a locking face on its side which is opposite said first immobilization hook
  • said cleat of said retaining ring is provided with two contact faces, one of said contact faces being on its side which is opposite said slot, and the other of said contact faces being on its opposite side, and said locking faces cooperate with said contact faces for abutting said first and second locking hooks against said stopper.
  • the groove has two walls, an inner wall closest to the rotor disc and an outer wall farthest from the rotor disc, characterized in that each locking face is located on said corresponding immobilizing hook, and extends in the axial direction from the free surface of said immobilizing hook to the inner wall of said groove.
  • each locking face is oriented in a radial plane of said rotor disk.
  • each locking face is oriented in an oblique plane with respect to a radial plane of said rotor disk.
  • the invention relates to a retaining ring of the blades of a turbomachine rotor, intended to be associated with a rotor disc provided with hooks distributed over its circumference, including a first immobilization hook and a second successive immobilizing hook, said first immobilizing hook being provided with a blocking face on its side which is opposite said second immobilization hook and another blocking face on its opposite side to its side which is opposite said second immobilization hook, said ring having a slot and two tabs, arranged on one side of this ring.
  • said two cleats are arranged on the same side of said slot, so that they can respectively abut against one of said two locking faces of said first immobilization hook.
  • the invention relates to a retaining ring of the blades of a turbomachine rotor, intended to be associated with a rotor disc provided with hooks distributed over its circumference, including a first immobilization hook and a second successive immobilization hook, said first immobilization hook being provided with a locking face on its side which is opposite said second immobilization hook, and said second immobilization hook being provided with a face of blocking on its side which is opposite said first immobilization hook, said ring having a slot.
  • said ring further comprises a single cleat, disposed on one side thereof on one side of said slot near it, so that said single cleat can be in abutment against the locking face of said first immobilization hook and the locking face of said second immobilization hook.
  • the invention relates to a disk / ring assembly, having a retention ring provided with a slot, and having a rotor disc provided with hooks distributed around its circumference and defining a groove for receiving said retention ring, characterized in that said rotor disk has a first immobilization hook and a second immobilization hook successive, in that said retaining ring has at least one cleat disposed on one side thereof near said slot, and in that the position of said latch on said retention ring is such that, when said retention ring is in place in said groove, said cleat is abutting against said first immobilization hook, and the slot is covered by said second immobilization hook.
  • said first immobilization hook is provided with a blocking face on its side which is opposite the second immobilization hook
  • said at least one stopper of the retention ring is provided with a contact face. on its side which is opposed to its side opposite said slot, and said locking face cooperates with said contact face for an abutment of said latch against said first immobilization hook.
  • said retaining ring comprises first and second tabs disposed on one side thereof on the same side of said slot, said first tab being closer than said second cleat of said slot.
  • the positions of said first and second tabs on the retention ring are such that, when said retention ring is in place in said groove, said first and second cleats abut against said first immobilization hook, on each side thereof, and said slot is covered by said second immobilization hook.
  • said first immobilization hook is provided with a locking face on its side which is opposite said second immobilization hook and another locking face on its opposite side
  • said cleats of said retaining ring are each provided with a contact face, the contact face of said second cleat being on its side which is opposite said slot, and the contact face of said first cleat being on its side which is opposite its side facing said slot, and said locking faces cooperate with said contact faces for an abutment of said latches against said first immobilization hook.
  • said retention ring comprises a single cleat disposed on one side thereof near said slot.
  • the position of said cleat on said retention ring is such that, when said retaining ring is in place in said groove, said single cleat abuts against said first immobilization hook and against said second hook immobilization, and said slot is covered by said second immobilization hook.
  • said first hook of immobilization is provided with a locking face on its side which is opposite said second immobilizing hook
  • said second immobilizing hook is provided with a locking face on its side which is opposite said first hook of immobilization
  • said cleat of said retaining ring is provided with two contact faces, one of said contact faces being on its side which is opposite said slot, and the other of said contact faces being on its opposite side, and said locking faces cooperate with said contact faces for abutment of said first and second locking hooks against said stopper.
  • the invention relates to a turbomachine rotor comprising an immobilization device according to the first aspect of the invention and / or a retention ring according to the second aspect of the invention and / or a disk assembly. ring according to the third aspect of the invention.
  • the invention relates to a turbomachine, for example an aircraft engine, comprising an immobilization device according to the first aspect of the invention and / or a retention ring according to the second aspect of the invention.
  • a turbomachine for example an aircraft engine
  • an immobilization device according to the first aspect of the invention and / or a retention ring according to the second aspect of the invention.
  • invention and / or a disk / ring assembly according to the third aspect of the invention.
  • FIGS. 3 and 4 The two embodiments of the rotational immobilization device according to the invention, illustrated in FIGS. 3 and 4, will only be described for their differences with the rotation immobilization device according to the prior art, illustrated in FIG. 2.
  • identical references designate identical characteristics.
  • the retention ring will simply be called “Ring”
  • the first and second immobilization hooks will simply be called “first hook” and “second hook” respectively.
  • a disc 10 of a rotor has teeth 12 which extend radially from its circumference and are distributed on this circumference.
  • the space between two successive teeth 12, 222, 224 forms an axially oriented cavity 13 in which is inserted a foot 14 of a removable blade 16.
  • These two successive teeth 12 have shapes and dimensions which make it possible to contain circumferentially and radially the blade 16 installed between them in the cell 13.
  • the teeth 12 have a protruding portion 4 protruding from the disk 10 in the upstream axial direction and / or a projecting portion 4 protruding from the disk 10 in the downstream axial direction.
  • each projecting portion 4 is formed an elementary groove opening radially inwards, the free end of each projecting portion 4 beyond the elementary groove with respect to the disk body 11 forming a hook 6 oriented radially. towards the inside.
  • Each elementary groove has two walls, an inner wall closest to the rotor disk 10 and an outer wall furthest from the rotor disk 10.
  • the succession of the elementary grooves forms a groove 22, discontinuous, in which the ring 20 is arranged.
  • the ring 20 in the groove 22 constitutes an axial abutment which makes it possible to prevent axial displacement. 16.
  • this ring 20 is opened by a slot 24 which separates its two ends 26 from one another.
  • the hooks 6 are successively a first hook 162 and a second hook 164.
  • the second hook 164 has a geometry similar to the geometry of the hooks 6 of the prior art.
  • the first hook 162 has a modified geometry compared to that of the hooks 6. It has a front face 142 which is the face of its free surface and two side surfaces 144 which are substantially perpendicular to the front surface 142. Each of these two side faces 144 extends from the front face 142 of the first hook 162 to the inner wall of the elementary groove of this first hook 162. Preferably, the two lateral faces 144 are obtained by machining on each lateral side of the first hook 162, that is to say on the side opposite the second hook 164 and on the side opposite this side facing the second hook 164. In other words, the corresponding tooth 12 ends with a hook 162 which has two lateral faces 144, these lateral faces being circumferentially recessed.
  • the lateral faces 144 are oriented along a radial plane of the rotor disk 10.
  • the ring 20 has a slot 24 and two tabs 302, 304 positioned on its face opposite its face facing the rotor disc 10.
  • each cleat 302, 304 is made in the following manner. Two cuts are made on the ring 20, so as to remove a ring sector having a given dimension in the circumferential direction of said ring 20 and the same dimension as the rest of the ring 20 in the axial direction. The removed sector is replaced by a part having the same dimension in the axial direction and the same dimension in the circumferential direction, but having a greater thickness. This piece is fixed to the rest of the ring 20 by welding so as to reconstitute a closed ring 20. Then the cleat 302, 304 is machined in said piece of greater thickness than the remainder of the ring 20. Such a procedure allows precise machining of the cleats 302, 304, ensuring their dimensions and their position on the ring 20.
  • the slot 24 is formed on the ring 20 after the two tabs 302, 304 have been made. It is positioned in such a way that the two catches 302, 304 are arranged on the same side of the slot 24, towards one of the ends 26. of the ring 20.
  • the first cleat 302 is closer to the slot 24 than the second cleat 304.
  • Each cleat 302, 304 has a contact face 32.
  • the contact face 32 of the second cleat 304 is oriented towards the slot 24.
  • the contact face 32 of the second cleat 304 is oriented on the opposite side.
  • each cleat 302, 304 is in abutment against one of the side faces 144 of the first hook 162.
  • the side faces 144 are locking faces of the first hook 162, which cooperate with the respective contact faces 32 of the two tabs 302, 304 of the ring 20.
  • the two ends 26 of the ring 20 and the slot 24 are then under the second hook 164.
  • the position of the two tabs 302, 304 on the ring 20 is suitably set, preferably depending on the dimensions and distances of the first and second hooks 162, 164 of the rotor disc 10.
  • the position of the first tab 302 is defined so that the slot 24 is under the second hook 164 while the contact face 32 of the first catch 302 is against the locking face 144 of the first hook 162.
  • the position of the second stop 304 is defined by the distance between the two cleats 302, 304, which is substantially equal to the distance between the two locking faces 144 of the first hook 162.
  • the ring 20 is prevented from turning in the groove 22. As a result, it can not escape from the groove 22 during the operation of the turbomachine. It follows that the vanes 16 can not escape in the direction of the cell 13 in which they are inserted.
  • the two tabs 302, 304 are located near the slot 24, which reduces the risk that the end 26 of the ring 20 located on the same side as the two tabs 302 , 304 does not escape from the groove 22.
  • the two tabs 302, 304 are located upstream of the slot 24 in the direction of rotation of the rotor, which is designated by the reference numeral 80 in FIG. 3. With this direction of rotation 80, it is the blocking face 144 of the first hook 162 which is opposite the second hook 164 which plays mainly a blocking function, in cooperation with the first catch 302 of the ring 20.
  • hooks 6 are successively a first hook 262 and a second hook 264.
  • the two hooks 262, 264 have a modified geometry compared to that of the hooks 6.
  • Each hook 262, 264 has a front face 142 which is the face of its free surface, and a lateral face 144 which is substantially perpendicular to the front face 142 and facing the other hook 264, 262.
  • the lateral face 144 of the first hook 262, respectively of the second hook 264 extends from the front face 142 of said hook 262, 264, to the inner wall. of the elementary groove of said hook 262, 264.
  • the lateral face 144 of the first hook 262 is obtained by machining on its lateral side which is opposite the second hook 264.
  • each of the corresponding teeth 12 ends with a hook 262, 264 which has a side face 144 on its side opposite the other hook 264, 262, said lateral face being circumferentially recessed.
  • the lateral faces 144 are oriented in a radial plane of the rotor disc 10.
  • the ring 20 has a slot 24 and a single lug 306 positioned on its face opposite its face facing the rotor disk 10.
  • the cleat 306 is preferably made by a method similar to that described for the production of the cleats 302, 304 of the first embodiment of the immobilizer.
  • the slot 24 is made on the ring 20 after the embodiment of the catch 306. It is positioned in such a way that the catch 306 is disposed on one side of the slot 24 and close to it, towards one of the ends 26 of the ring 20.
  • the cleat 306 has two contact faces 32. One of the contact faces 32 of the cleat 306 is oriented on the side of the slot 24 and the other contact face 32 is oriented on the opposite side.
  • each contact face 32 of the cleat 306 is in abutment against the face lateral faces 144 of the first hook 262 and against the lateral face 144 of the second hook 264.
  • the lateral faces 144 of the first hook 162 and the second hook 164 are locking faces which cooperate with the respective contact faces 32 of the cleat 306 of the 20.
  • the two ends 26 of the ring 20 and the slot 24 are then under the second hook 264.
  • the position of the cleat 306 on the ring 20 and the circumferential width or dimension of the cleat 306 are suitably set, preferably depending on the dimensions and distances of the hooks 262, 264 of the rotor disk 10.
  • the distance between the cleat 306 and the slot 24 is defined so that the slot 24 is under the second hook 264 while one of the contact faces 32 of the catch 306 is against one of the two respective locking faces 144 of the two hooks 262, 264
  • the width of the catch 306 is substantially equal to the distance between the locking face 144 of the first hook 262 and the locking face 144 of the second hook 264.
  • the ring 20 is prevented from rotating in the groove 22. As a result, it can not escape the groove 22 during operation of the turbomachine. It follows that the vanes 16 can not escape in the axial direction of the cell 13 in which they are inserted.
  • the cleat 306 is located near the slot 24, which reduces the risk that the end 26 of the ring 20 located on the same side as the cleat 306 escapes. throat 22.
  • the cleat 306 is located upstream of the slot 24 in the direction of rotation of the rotor, which is designated by the reference 80 in FIG. 4. With this direction of rotation 80, it is the locking face 144 of the first hook 262 which plays mainly a blocking function, in cooperation with the cleat 306 of the ring 20.
  • the invention which has just been described thus makes it possible to prevent the ring 20 from rotating in the groove 22. It has the advantage that the slot 24 of the ring 20 is positioned under a hook and not between two hooks.
  • the actual immobilization function (by abutting the contact faces 32 of the catches against the locking faces 144 of the hooks 162, 262, 264 ) and the overlap function of the slot 24 is not provided by a single disk hook as was the case with the immobilizer of the prior art.
  • An advantage of the immobilization device of the ring 20 according to the invention lies in the fact that it is possible to dissociate the width of the slot 24, that is to say the clearance between the two ends or strands 26 of the ring 20, the clearance necessary for mounting the ring 20 between the faces in cooperation, namely at least one of the faces of contact 32 and at least one of the locking faces 144.
  • the first cleat 302 alone would fulfill the immobilization function in rotation of the ring 20, taking into account the direction of rotation represented by the arrow 80.
  • the second cleat 304 allows, in addition, maintain the opening of the slot 24 between the two strands 26, and prevent these two strands 26 come into contact.
  • the immobilization function in rotation of the ring 20 is filled by the abutment of one of the contact faces 32 of the catch 306 with the locking face 144 of the first immobilization hook. 262, taking into account the direction of rotation represented by the arrow 80.
  • the abutment of the other of the contact faces 32 of the cleat 306 with the locking face 144 of the second immobilization hook 264 allows, moreover, to control the position of the strand 26 carrying the cleat 306 relative to the other strand 26, to maintain the opening of the slot 24 between the two strands 26, and to prevent them from coming into contact.
  • the abutment of the cleat 306 against the first hook 262 and against the second hook 264 is achieved by controlling the circumferential dimension of said cleat 306.
  • the control of the circumferential clearance that is to say the opening of the slot 24 between the two strands 26 of the ring 20 has the effect of improving the maintenance of these two. strands 26 in the groove 22, and thus the retention of the ring 20 in the groove 22.
  • the slot 24 is perpendicular to the circumferential direction of the ring 20, but it could be oblique, without departing from the scope of the invention.
  • the locking faces are oriented along a radial plane of the rotor disk, but they could be oriented in an oblique plane with respect to a radial plane of the rotor disk, without departing from the frame. of the invention.
  • the cells 13 into which the feet 14 of the vanes 16 are inserted are oriented axially, but the invention also applies to configurations in which the direction of the cells forms an angle with the direction axial axis of the turbomachine.

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

Abstract

The device has a ring (20) for retaining blades on a rotor disk of a turbomachine. The rotor disk (10) provides a set of blocking hooks (162, 164) that spread around a circumference and defines a groove for placing the ring. The ring is provided with a split and a set of cleat (302, 304), which is arranged on the ring and placed in the groove. The cleat is compressed against one blocking hook and the split is covered by another blocking hook. The former hook is provided with a check face that cooperates with a contact face brings the cleat next to the split. Independent claims are also included for the following: (1) a ring for retaining the blades of a turbomachine rotor (2) a disk/ring assembly of a turbomachine (3) a turbomachine rotor (4) an aircraft engine.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention se rapporte au domaine technique des anneaux de rétention axiale des aubes d'un rotor d'une turbomachine, notamment d'un moteur d'aéronef.The present invention relates to the technical field of rings for axial retention of the blades of a rotor of a turbomachine, in particular an aircraft engine.

Elle vise un dispositif d'immobilisation en rotation d'un tel anneau de rétention.It is a device for immobilizing in rotation of such a retention ring.

Elle vise aussi un anneau de rétention des aubes d'un rotor de turbomachine, ainsi qu'un rotor comportant un tel dispositif d'immobilisation en rotation.It also relates to a retaining ring of the blades of a turbomachine rotor, and a rotor comprising such a device for immobilization in rotation.

Elle vise enfin une turbomachine, par exemple un moteur d'aéronef, comportant un tel dispositif d'immobilisation en rotation.Finally, it relates to a turbomachine, for example an aircraft engine, comprising such a device for immobilizing rotation.

Dans tout le texte, le terme « axial » se rapporte à la direction axiale de la turbomachine.Throughout the text, the term "axial" refers to the axial direction of the turbomachine.

ÉTAT DE LA TECHNIQUE ANTÉRIEURESTATE OF THE PRIOR ART

Il est connu qu'un rotor de turbomachine soit équipé d'un disque et d'aubes portées par le disque, ainsi que d'un anneau de rétention pour empêcher un déplacement des aubes dans la direction axiale, comme décrit dans le document FR 2 729 709-A1 .It is known that a turbomachine rotor is equipped with a disk and vanes carried by the disk, as well as with a retention ring to prevent movement of the vanes in the axial direction, as described in the document FR 2 729 709-A1 .

La figure 1 illustre un tel anneau de rétention des aubes d'un rotor, connu par la technique antérieure.Figure 1 illustrates such a blade retention ring of a rotor, known from the prior art.

En se reportant à la figure 1, un disque 10 d'un rotor comporte un corps de disque 11 et des dents 12 qui s'étendent radialement à partir du corps de disque 11 et sont réparties sur la circonférence de celui-ci. L'espace entre deux dents 12 successives forme une alvéole 13 orientée axialement. Chaque dent 12 est dotée d'au moins un crochet 6 en saillie suivant une direction axiale, qui définit sur cette dent une gorge élémentaire s'ouvrant radialement vers l'intérieur. Sur l'exemple illustré, les dents 12 sont dotées d'un crochet 6 amont et d'un crochet 6 aval.Referring to FIG. 1, a disk 10 of a rotor has a disk body 11 and teeth 12 which extend radially from the disk body 11 and are distributed around the circumference thereof. The space between two successive teeth 12 forms a cell 13 oriented axially. Each tooth 12 is provided with at least one hook 6 projecting in an axial direction, which defines on this tooth an elementary groove opening radially inwards. In the illustrated example, the teeth 12 are provided with an upstream hook 6 and a downstream hook 6.

La figure 2 illustre un pied 14 d'une aube 16 inséré dans une telle alvéole 13. Les deux dents 12 permettent de contenir circonférentiellement et radialement cette aube 16.FIG. 2 illustrates a root 14 of a blade 16 inserted into such a cell 13. The two teeth 12 make it possible to contain this blade 16 circumferentially and radially.

Comme illustré sur la figure 2, et de manière connue, un anneau de rétention 20 est placé dans une gorge 22, discontinue, qui correspond à la succession des gorges élémentaires. La présence de l'anneau de rétention 20 dans la gorge 22 permet d'empêcher un déplacement axial des aubes 16. Pour faciliter son installation dans la gorge 22, l'anneau de rétention 20 est ouvert par une fente 24 qui sépare les deux extrémités ou brins 26 de celui-ci.As illustrated in Figure 2, and in a known manner, a retention ring 20 is placed in a groove 22, discontinuous, which corresponds to the succession of elementary grooves. The presence of the retaining ring 20 in the groove 22 makes it possible to prevent axial displacement of the blades 16. To facilitate its installation in the groove 22, the retaining ring 20 is opened by a slot 24 which separates the two ends or strands 26 thereof.

Il est généralement préféré que la fente 24 de l'anneau de rétention 20 soit située au niveau de l'une des dents 12 et non entre deux dents 12 voisines, afin d'éviter que les extrémités de l'anneau de rétention 20 ne sortent de la gorge 22. A cette fin, il est connu de doter l'anneau de rétention 20 d'un dispositif d'immobilisation en rotation, qui assure que la fente 24 reste positionnée au niveau de l'une dent 12 une fois que l'anneau de rétention 20 a été installé dans la gorge 22.It is generally preferred that the slot 24 of the retaining ring 20 is located at one of the teeth 12 and not between two adjacent teeth 12, in order to prevent the ends of the retention ring 20 from coming out. of the groove 22. For this purpose, it is known to provide the retaining ring 20 with a rotational immobilization device, which ensures that the slot 24 remains positioned at one tooth 12 once the retaining ring 20 has been installed in the groove 22.

Le dispositif d'immobilisation en rotation de l'anneau de rétention 20 selon la technique antérieure, illustré sur la figure 1, comporte :

  • deux taquets 30 de l'anneau de rétention 20, qui sont disposés respectivement aux deux extrémités 26 de celui-ci, de chaque côté de la fente 24, et qui ont chacun une face de contact 32 du côté de la fente 24, et
  • un crochet formant butée 60 de l'une des dents 12, ce crochet formant butée 60 ayant une face frontale 42 et deux faces latérales 44 sensiblement opposées l'une à l'autre, les faces latérales 44 étant obtenues par usinage des côtés latéraux du crochet formant butée 60.
The immobilization device in rotation of the retention ring 20 according to the prior art, illustrated in FIG. 1, comprises:
  • two tabs 30 of the retaining ring 20, which are respectively disposed at both ends 26 thereof, on each side of the slot 24, and which each have a contact face 32 on the side of the slot 24, and
  • a hook forming a stop 60 of one of the teeth 12, this stop-forming hook 60 having a front face 42 and two lateral faces 44 substantially opposite to each other, the lateral faces 44 being obtained by machining the lateral sides of the hook forming a stop 60.

Lorsque l'anneau de rétention 20 est mis en place dans la gorge 22, chaque face de contact 32 des taquets respectifs 30 se trouve en butée contre l'une des faces latérales 44 du crochet formant butée 60. Par suite, la fente 24 se trouve sous le crochet formant butée 60 et l'anneau de rétention 20 est empêché de tourner, de sorte que l'anneau de rétention 20 ne peut pas sortir spontanément de la gorge 22 lors du fonctionnement de la turbomachine. Il s'ensuit que les aubes 16 ne peuvent s'échapper des alvéoles 13 dans lesquelles sont insérés leurs pieds 14.When the retaining ring 20 is put in place in the groove 22, each contact face 32 of the respective cleats 30 is in abutment against one of the lateral faces 44 of the abutment hook 60. As a result, the slot 24 becomes is located under the hook stop 60 and the retaining ring 20 is prevented from rotating, so that the retaining ring 20 can not spontaneously exit the groove 22 during operation of the turbomachine. It follows that the vanes 16 can not escape from the cells 13 into which their feet 14 are inserted.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

La présente invention propose un dispositif d'immobilisation en rotation d'un anneau de rétention des aubes d'un rotor d'une turbomachine, qui constitue une alternative au dispositif d'immobilisation en rotation de la technique antérieure qui a été décrit ci-dessus.The present invention proposes a device for immobilization in rotation of a retention ring rotor blades of a turbomachine, which is an alternative to the prior art rotation immobilizer described above.

Selon un premier aspect, l'invention se rapporte à un dispositif d'immobilisation en rotation d'un anneau de rétention d'aubes sur un disque de rotor d'une turbomachine suivant une direction sensiblement axiale de ladite turbomachine,
ledit disque de rotor étant muni de crochets répartis sur sa circonférence et définissant une gorge pour recevoir ledit anneau de rétention, dont un premier et un deuxième crochets d'immobilisation successifs, et ledit anneau de rétention étant muni d'une fente, et d'au moins un taquet disposé sur une face de celui-ci près de ladite fente. Selon l'invention, la position dudit au moins un taquet sur ledit anneau de rétention est telle que, lorsque ledit anneau de rétention est en place dans ladite gorge, ledit au moins un taquet est en butée contre ledit premier crochet d'immobilisation, et la fente est recouverte par ledit deuxième crochet d'immobilisation.According to a first aspect, the invention relates to an immobilization device in rotation of a blade retention ring on a rotor disk of a turbomachine in a substantially axial direction of said turbomachine,
said rotor disk being provided with hooks distributed around its circumference and defining a groove for receiving said retention ring, including a first and a second successive locking hooks, and said retention ring being provided with a slot, and at least one cleat disposed on one side thereof near said slot. According to the invention, the position of said at least one stopper on said retention ring is such that, when said retention ring is in place in said groove, said at least one stop abuts against said first immobilization hook, and the slot is covered by said second immobilization hook.

Comme cela apparaîtra dans la suite de la description, l'expression « crochet d'immobilisation » couvre deux fonctions que remplissent l'un et/ou l'autre de ces deux crochets : une fonction de butée pour un taquet et une fonction de recouvrement de la fente.As will appear in the following description, the term "immobilization hook" covers two functions that fill one and / or the other of these two hooks: a stop function for a cleat and a recovery function of the slot.

De préférence, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard du deuxième crochet d'immobilisation, ledit taquet de l'anneau de rétention est doté d'une face de contact orientée vers son côté qui est opposé au côté en regard de ladite fente, et ladite face de blocage coopère avec ladite face de contact pour une mise en butée dudit taquet contre ledit premier crochet d'immobilisation.Preferably, said first immobilization hook is provided with a locking face on its side which is opposite the second hook. immobilization, said cleat of the retaining ring is provided with a contact face oriented towards its side which is opposite the opposite side of said slot, and said locking face cooperates with said contact face for a setting abutment of said cleat against said first immobilization hook.

Selon un premier mode de réalisation, le dispositif d'immobilisation comporte :

  • un premier et un deuxième crochets d'immobilisation successifs dudit disque de rotor, et
  • un premier et un deuxième taquets de l'anneau de rétention, disposés sur une face de celui-ci du même côté de ladite fente, ledit premier taquet étant plus proche que ledit deuxième taquet de ladite fente.
According to a first embodiment, the immobilizer comprises:
  • first and second successive immobilizing hooks of said rotor disk, and
  • first and second cleats of the retention ring, disposed on one side thereof on the same side of said slot, said first cleat being closer than said second cleat of said slot.

Selon ce premier mode de réalisation, les positions desdits premier et deuxième taquets sur l'anneau de rétention sont telle que, lorsque ledit anneau de rétention est en place dans ladite gorge, lesdits premier et deuxième taquets sont en butée contre ledit premier crochet d'immobilisation, de chaque côté de celui-ci, et ladite fente est recouverte par ledit deuxième crochet d'immobilisation.According to this first embodiment, the positions of said first and second tabs on the retention ring are such that, when said retention ring is in place in said groove, said first and second tabs abut against said first hook of immobilization, on each side thereof, and said slot is covered by said second immobilization hook.

De préférence, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation et d'une autre face de blocage sur son côté opposé, lesdits taquets dudit anneau de rétention sont dotés chacun d'une face de contact, la face de contact dudit deuxième taquet étant sur son côté qui est en regard de ladite fente, et la face de contact dudit premier taquet étant sur son côté qui est opposé à son côté en regard de ladite fente, et lesdites faces de blocage coopèrent avec lesdites faces de contact pour une mise en butée desdits taquets contre ledit premier crochet d'immobilisation.Preferably, said first immobilization hook is provided with a locking face on its side which is opposite said second immobilization hook and another locking face on its opposite side, said stops of said retention ring are each having a contact face, the contact face of said second cleat being on its side facing said slot, and the contact face said first cleat being on its side which is opposite its side facing said slot, and said locking faces cooperate with said contact faces for an abutment of said cleats against said first immobilization hook.

Selon un deuxième mode de réalisation, le dispositif d'immobilisation comporte :

  • un premier et un deuxième crochets d'immobilisation successifs dudit disque de rotor, et
  • un taquet unique dudit anneau de rétention, disposé sur une face de celui-ci près de ladite fente. Selon ce deuxième mode de réalisation, la position dudit taquet sur ledit anneau de rétention est telle que, lorsque ledit anneau de rétention est en place dans ladite gorge, ledit taquet unique est en butée contre ledit premier crochet d'immobilisation et contre ledit deuxième crochet d'immobilisation, et ladite fente est recouverte par ledit deuxième crochet d'immobilisation.
According to a second embodiment, the immobilizer comprises:
  • first and second successive immobilizing hooks of said rotor disk, and
  • a single cleat of said retention ring, disposed on a face thereof near said slot. According to this second embodiment, the position of said cleat on said retention ring is such that, when said retaining ring is in place in said groove, said single cleat abuts against said first immobilization hook and against said second hook immobilization, and said slot is covered by said second immobilization hook.

De préférence, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation, ledit deuxième crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit premier crochet d'immobilisation, ledit taquet dudit anneau de rétention est doté de deux faces de contact, l'une desdites faces de contact étant sur son côté qui est en regard de ladite fente, et l'autre desdites faces de contact étant sur son côté opposé, et lesdites faces de blocage coopèrent avec lesdites faces de contact pour une mise en butée desdits premier et deuxième crochets d'immobilisation contre ledit taquet.Preferably, said first immobilization hook is provided with a locking face on its side which is opposite said second immobilizing hook, said second immobilizing hook is provided with a locking face on its side which is opposite said first immobilization hook, said cleat of said retaining ring is provided with two contact faces, one of said contact faces being on its side which is opposite said slot, and the other of said contact faces being on its opposite side, and said locking faces cooperate with said contact faces for abutting said first and second locking hooks against said stopper.

De manière commune aux deux modes de réalisation du dispositif d'immobilisation, la gorge a deux parois dont une paroi interne la plus proche du disque de rotor et une paroi externe la plus éloignée du disque de rotor, caractérisé en ce que chaque face de blocage est située sur ledit crochet d'immobilisation correspondant, et s'étend suivant la direction axiale à partir de la surface libre dudit crochet d'immobilisation jusqu'à la paroi interne de ladite gorge.In common with both embodiments of the immobilizer, the groove has two walls, an inner wall closest to the rotor disc and an outer wall farthest from the rotor disc, characterized in that each locking face is located on said corresponding immobilizing hook, and extends in the axial direction from the free surface of said immobilizing hook to the inner wall of said groove.

Selon une variante, chaque face de blocage est orientée selon un plan radial dudit disque de rotor.According to a variant, each locking face is oriented in a radial plane of said rotor disk.

Selon une autre variante, chaque face de blocage est orientée selon un plan oblique par rapport à un plan radial dudit disque de rotor.According to another variant, each locking face is oriented in an oblique plane with respect to a radial plane of said rotor disk.

Selon un deuxième aspect, l'invention se rapporte à un anneau de rétention des aubes d'un rotor de turbomachine, destiné à être associé à un disque de rotor muni de crochets répartis sur sa circonférence, dont un premier crochet d'immobilisation et un deuxième crochet d'immobilisation successifs, ledit premier crochet d'immobilisation étant doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation et d'une autre face de blocage sur son côté opposé à son côté qui est en regard dudit deuxième crochet d'immobilisation, ledit anneau comportant une fente et deux taquets, disposés sur une face de cet anneau. Selon l'invention, lesdits deux taquets sont agencés du même côté de ladite fente, de manière à ce qu'ils puissent se trouver respectivement en butée contre l'une desdites deux faces de blocage dudit premier crochet d'immobilisation.According to a second aspect, the invention relates to a retaining ring of the blades of a turbomachine rotor, intended to be associated with a rotor disc provided with hooks distributed over its circumference, including a first immobilization hook and a second successive immobilizing hook, said first immobilizing hook being provided with a blocking face on its side which is opposite said second immobilization hook and another blocking face on its opposite side to its side which is opposite said second immobilization hook, said ring having a slot and two tabs, arranged on one side of this ring. According to the invention, said two cleats are arranged on the same side of said slot, so that they can respectively abut against one of said two locking faces of said first immobilization hook.

Toujours selon un deuxième aspect, l'invention se rapporte à un anneau de rétention des aubes d'un rotor de turbomachine, destiné à être associé à un disque de rotor muni de crochets répartis sur sa circonférence, dont un premier crochet d'immobilisation et un deuxième crochet d'immobilisation successifs, ledit premier crochet d'immobilisation étant doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation, et ledit deuxième crochet d'immobilisation étant doté d'une face de blocage sur son côté qui est en regard dudit premier crochet d'immobilisation, ledit anneau comportant une fente. Selon l'invention, ledit anneau comporte de plus un taquet unique, disposé sur une face de celui-ci d'un côté de ladite fente à proximité de celle-ci, de manière à ce que ledit taquet unique puisse se trouver en butée contre la face de blocage dudit premier crochet d'immobilisation et la face de blocage dudit second crochet d'immobilisation.Still according to a second aspect, the invention relates to a retaining ring of the blades of a turbomachine rotor, intended to be associated with a rotor disc provided with hooks distributed over its circumference, including a first immobilization hook and a second successive immobilization hook, said first immobilization hook being provided with a locking face on its side which is opposite said second immobilization hook, and said second immobilization hook being provided with a face of blocking on its side which is opposite said first immobilization hook, said ring having a slot. According to the invention, said ring further comprises a single cleat, disposed on one side thereof on one side of said slot near it, so that said single cleat can be in abutment against the locking face of said first immobilization hook and the locking face of said second immobilization hook.

Selon un troisième aspect, l'invention se rapporte à un ensemble disque/anneau,
comportant un anneau de rétention muni d'une fente,
et comportant un disque de rotor muni de crochets répartis sur sa circonférence et définissant une gorge pour recevoir ledit anneau de rétention,
caractérisé en ce que ledit disque de rotor comporte un premier crochet d'immobilisation et un deuxième crochet d'immobilisation successifs,
en ce que ledit anneau de rétention comporte au moins un taquet disposé sur une face de celui-ci près de ladite fente,
et en ce que la position dudit taquet sur ledit anneau de rétention est telle que, lorsque ledit anneau de rétention est en place dans ladite gorge, ledit taquet est en butée contre ledit premier crochet d'immobilisation, et la fente est recouverte par ledit deuxième crochet d'immobilisation.According to a third aspect, the invention relates to a disk / ring assembly,
having a retention ring provided with a slot,
and having a rotor disc provided with hooks distributed around its circumference and defining a groove for receiving said retention ring,
characterized in that said rotor disk has a first immobilization hook and a second immobilization hook successive,
in that said retaining ring has at least one cleat disposed on one side thereof near said slot,
and in that the position of said latch on said retention ring is such that, when said retention ring is in place in said groove, said cleat is abutting against said first immobilization hook, and the slot is covered by said second immobilization hook.

De préférence, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard du deuxième crochet d'immobilisation, ledit au moins un taquet de l'anneau de rétention est doté d'une face de contact sur son côté qui est opposé à son côté en regard de ladite fente, et ladite face de blocage coopère avec ladite face de contact pour une mise en butée dudit taquet contre ledit premier crochet d'immobilisation.Preferably, said first immobilization hook is provided with a blocking face on its side which is opposite the second immobilization hook, said at least one stopper of the retention ring is provided with a contact face. on its side which is opposed to its side opposite said slot, and said locking face cooperates with said contact face for an abutment of said latch against said first immobilization hook.

Selon un premier mode de réalisation de l'ensemble disque/anneau, ledit anneau de rétention comporte un premier et un deuxième taquets, disposés sur une face de celui-ci du même côté de ladite fente, ledit premier taquet étant plus proche que ledit deuxième taquet de ladite fente. Selon ce premier mode de réalisation, les positions desdits premier et deuxième taquets sur l'anneau de rétention sont telles que, lorsque ledit anneau de rétention est en place dans ladite gorge, lesdits premier et deuxième taquets sont en butée contre ledit premier crochet d'immobilisation, de chaque côté de celui-ci, et ladite fente est recouverte par ledit deuxième crochet d'immobilisation.According to a first embodiment of the disk / ring assembly, said retaining ring comprises first and second tabs disposed on one side thereof on the same side of said slot, said first tab being closer than said second cleat of said slot. According to this first embodiment, the positions of said first and second tabs on the retention ring are such that, when said retention ring is in place in said groove, said first and second cleats abut against said first immobilization hook, on each side thereof, and said slot is covered by said second immobilization hook.

Selon ce premier mode de réalisation de l'ensemble disque/anneau, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation et d'une autre face de blocage sur son côté opposé, lesdits taquets dudit anneau de rétention sont dotés chacun d'une face de contact, la face de contact dudit deuxième taquet étant sur son côté qui est en regard de ladite fente, et la face de contact dudit premier taquet étant sur son côté qui est opposé à son côté en regard de ladite fente, et lesdites faces de blocage coopèrent avec lesdites faces de contact pour une mise en butée desdits taquets contre ledit premier crochet d'immobilisation.According to this first embodiment of the disk / ring assembly, said first immobilization hook is provided with a locking face on its side which is opposite said second immobilization hook and another locking face on its opposite side, said cleats of said retaining ring are each provided with a contact face, the contact face of said second cleat being on its side which is opposite said slot, and the contact face of said first cleat being on its side which is opposite its side facing said slot, and said locking faces cooperate with said contact faces for an abutment of said latches against said first immobilization hook.

Selon un deuxième mode de réalisation de l'ensemble disque/anneau, ledit anneau de rétention comporte un taquet unique disposé sur une face de celui-ci près de ladite fente. Selon ce deuxième mode de réalisation, la position dudit taquet sur ledit anneau de rétention est telle que, lorsque ledit anneau de rétention est en place dans ladite gorge, ledit taquet unique est en butée contre ledit premier crochet d'immobilisation et contre ledit deuxième crochet d'immobilisation, et ladite fente est recouverte par ledit deuxième crochet d'immobilisation.According to a second embodiment of the disk / ring assembly, said retention ring comprises a single cleat disposed on one side thereof near said slot. According to this second embodiment, the position of said cleat on said retention ring is such that, when said retaining ring is in place in said groove, said single cleat abuts against said first immobilization hook and against said second hook immobilization, and said slot is covered by said second immobilization hook.

Selon ce deuxième mode de réalisation de l'ensemble disque/anneau, ledit premier crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit deuxième crochet d'immobilisation, ledit deuxième crochet d'immobilisation est doté d'une face de blocage sur son côté qui est en regard dudit premier crochet d'immobilisation, ledit taquet dudit anneau de rétention est doté de deux faces de contact, l'une desdites faces de contact étant sur son côté qui est en regard de ladite fente, et l'autre desdites faces de contact étant sur son côté opposé, et lesdites faces de blocage coopèrent avec lesdites faces de contact pour une mise en butée desdits premier et deuxième crochets d'immobilisation contre ledit taquet.According to this second embodiment of the disk / ring assembly, said first hook of immobilization is provided with a locking face on its side which is opposite said second immobilizing hook, said second immobilizing hook is provided with a locking face on its side which is opposite said first hook of immobilization, said cleat of said retaining ring is provided with two contact faces, one of said contact faces being on its side which is opposite said slot, and the other of said contact faces being on its opposite side, and said locking faces cooperate with said contact faces for abutment of said first and second locking hooks against said stopper.

Selon un quatrième aspect, l'invention se rapporte à un rotor de turbomachine comportant un dispositif d'immobilisation selon le premier aspect de l'invention et/ou un anneau de rétention selon le deuxième aspect de l'invention et/ou un ensemble disque/anneau selon le troisième aspect de l'invention.According to a fourth aspect, the invention relates to a turbomachine rotor comprising an immobilization device according to the first aspect of the invention and / or a retention ring according to the second aspect of the invention and / or a disk assembly. ring according to the third aspect of the invention.

Selon un cinquième aspect, l'invention se rapporte à une turbomachine, par exemple un moteur d'aéronef, comportant un dispositif d'immobilisation selon le premier aspect de l'invention et/ou un anneau de rétention selon le second aspect de l'invention et/ou un ensemble disque/anneau selon le troisième aspect de l'invention.According to a fifth aspect, the invention relates to a turbomachine, for example an aircraft engine, comprising an immobilization device according to the first aspect of the invention and / or a retention ring according to the second aspect of the invention. invention and / or a disk / ring assembly according to the third aspect of the invention.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

L'invention sera mieux comprise à la lecture de la description détaillée qui va suivre de modes de réalisation de l'invention, donnés à titre illustratif et nullement limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1, déjà décrite, représente une vue en perspective d'une portion de disque de rotor, adapté pour un dispositif d'immobilisation en rotation d'un anneau de rétention d'aubes ;
  • la figure 2, déjà décrite, représente une vue en perspective d'un dispositif d'immobilisation en rotation d'un anneau de rétention d'aubes d'un rotor de turbomachine, conformément à la technique antérieure ;
  • la figure 3 représente une vue en perspective d'un dispositif d'immobilisation en rotation d'un anneau de rétention d'aubes d'un rotor de turbomachine, conformément à un premier mode de réalisation d'un dispositif d'immobilisation d'anneau de rétention selon l'invention ;
  • la figure 4 est analogue à la figure 3, pour un deuxième mode de réalisation d'un dispositif d'immobilisation d'anneau de rétention selon l'invention.
The invention will be better understood on reading the following detailed description of embodiments of the invention given as illustrative and in no way limiting, with reference to the accompanying drawings, in which:
  • Figure 1, already described, shows a perspective view of a rotor disc portion, adapted for a device for immobilizing a rotation of a blade retention ring;
  • FIG. 2, already described, represents a perspective view of an immobilization device in rotation of a blade retention ring of a turbomachine rotor, according to the prior art;
  • FIG. 3 represents a perspective view of an immobilization device in rotation of a blade retention ring of a turbomachine rotor, in accordance with a first embodiment of a ring immobilization device. retention agent according to the invention;
  • Figure 4 is similar to Figure 3, for a second embodiment of a retention ring immobilizer according to the invention.

EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

Les deux modes de réalisation du dispositif d'immobilisation en rotation selon l'invention, illustrés aux figures 3 et 4, ne seront décrits que pour leurs différences avec le dispositif d'immobilisation en rotation selon la technique antérieure, illustré à la figure 2. Sur les figures, des repères identiques désignent des caractéristiques identiques.The two embodiments of the rotational immobilization device according to the invention, illustrated in FIGS. 3 and 4, will only be described for their differences with the rotation immobilization device according to the prior art, illustrated in FIG. 2. In the figures, identical references designate identical characteristics.

Pour simplifier la description détaillée qui suit, l'anneau de rétention sera simplement appelé « anneau », et les premier et deuxième crochets d'immobilisation seront simplement appelés « premier crochet » et « deuxième crochet » respectivement.To simplify the detailed description that follows, the retention ring will simply be called "Ring", and the first and second immobilization hooks will simply be called "first hook" and "second hook" respectively.

En se reportant aux figures 3 et 4, un disque 10 d'un rotor comporte des dents 12 qui s'étendent radialement à partir de sa circonférence et sont répartis sur cette circonférence.Referring to Figures 3 and 4, a disc 10 of a rotor has teeth 12 which extend radially from its circumference and are distributed on this circumference.

L'espace entre deux dents 12, 222, 224 successives forme une alvéole 13 orientée axialement dans laquelle est inséré un pied 14 d'une aube amovible 16. Ces deux dents successives 12 ont des formes et des dimensions qui permettent de contenir circonférentiellement et radialement l'aube 16 installée entre elles dans l'alvéole 13.The space between two successive teeth 12, 222, 224 forms an axially oriented cavity 13 in which is inserted a foot 14 of a removable blade 16. These two successive teeth 12 have shapes and dimensions which make it possible to contain circumferentially and radially the blade 16 installed between them in the cell 13.

Les dents 12 ont une partie en saillie 4 qui dépasse du disque 10 suivant la direction axiale vers l'amont et/ou une partie en saillie 4 qui dépasse du disque 10 suivant la direction axiale vers l'aval. Dans chaque partie en saillie 4 est ménagée une gorge élémentaire s'ouvrant radialement vers l'intérieur, l'extrémité libre de chaque partie en saillie 4 au-delà de la gorge élémentaire par rapport au corps de disque 11 formant un crochet 6 orienté radialement vers l'intérieur. Chaque gorge élémentaire possède deux parois dont une paroi interne la plus proche du disque de rotor 10 et une paroi externe la plus éloignée du disque de rotor 10.The teeth 12 have a protruding portion 4 protruding from the disk 10 in the upstream axial direction and / or a projecting portion 4 protruding from the disk 10 in the downstream axial direction. In each projecting portion 4 is formed an elementary groove opening radially inwards, the free end of each projecting portion 4 beyond the elementary groove with respect to the disk body 11 forming a hook 6 oriented radially. towards the inside. Each elementary groove has two walls, an inner wall closest to the rotor disk 10 and an outer wall furthest from the rotor disk 10.

La succession des gorges élémentaires forme une gorge 22, discontinue, dans laquelle est disposé l'anneau 20. L'anneau 20 dans la gorge 22 constitue une butée axiale qui permet d'empêcher un déplacement axial des aubes 16. Pour faciliter son installation dans la gorge 22, cet anneau 20 est ouvert par une fente 24 qui sépare ses deux extrémités 26 l'une de l'autre.The succession of the elementary grooves forms a groove 22, discontinuous, in which the ring 20 is arranged. The ring 20 in the groove 22 constitutes an axial abutment which makes it possible to prevent axial displacement. 16. To facilitate its installation in the groove 22, this ring 20 is opened by a slot 24 which separates its two ends 26 from one another.

On va maintenant décrire le dispositif d'immobilisation, du disque de rotor 10, et de l'anneau 20 selon le premier mode de réalisation de l'invention, en se référant à la figure 3.The immobilizer, the rotor disk 10 and the ring 20 according to the first embodiment of the invention will now be described with reference to FIG.

Parmi les crochets 6 se trouvent successivement un premier crochet 162 et un deuxième crochet 164. Le deuxième crochet 164 a une géométrie similaire à la géométrie des crochets 6 de la technique antérieure.Among the hooks 6 are successively a first hook 162 and a second hook 164. The second hook 164 has a geometry similar to the geometry of the hooks 6 of the prior art.

Le premier crochet 162 a une géométrie modifiée par rapport celle des crochets 6. Il présente une face frontale 142 qui est la face de sa surface libre et deux surfaces latérales 144 qui sont sensiblement perpendiculaires à la surface frontale 142. Chacune de ces deux faces latérales 144 s'étend depuis la face frontale 142 du premier crochet 162 jusqu'à la paroi interne de la gorge élémentaire de ce premier crochet 162. De préférence, les deux faces latérales 144 sont obtenues par usinage sur chaque côté latéral du premier crochet 162, c'est-à-dire sur le côté qui est en regard du deuxième crochet 164 et sur le côté opposé à ce côté en regard du deuxième crochet 164. En d'autres termes, la dent 12 correspondante se termine par un crochet 162 qui présente deux faces latérales 144, ces faces latérales étant circonférentiellement en retrait.The first hook 162 has a modified geometry compared to that of the hooks 6. It has a front face 142 which is the face of its free surface and two side surfaces 144 which are substantially perpendicular to the front surface 142. Each of these two side faces 144 extends from the front face 142 of the first hook 162 to the inner wall of the elementary groove of this first hook 162. Preferably, the two lateral faces 144 are obtained by machining on each lateral side of the first hook 162, that is to say on the side opposite the second hook 164 and on the side opposite this side facing the second hook 164. In other words, the corresponding tooth 12 ends with a hook 162 which has two lateral faces 144, these lateral faces being circumferentially recessed.

Sur l'exemple illustré à la figure 3, les faces latérales 144 sont orientées selon un plan radial du disque de rotor 10.In the example illustrated in FIG. 3, the lateral faces 144 are oriented along a radial plane of the rotor disk 10.

L'anneau 20 comporte une fente 24 et deux taquets 302, 304 positionnés sur sa face opposée à sa face en regard du disque de rotor 10.The ring 20 has a slot 24 and two tabs 302, 304 positioned on its face opposite its face facing the rotor disc 10.

De préférence, chaque taquet 302, 304 est réalisé de la manière suivante. On réalise deux découpes sur l'anneau 20, de manière à retirer un secteur d'anneau ayant une dimension donnée suivant la direction circonférentielle dudit anneau 20 et la même dimension que le reste de l'anneau 20 suivant la direction axiale. On remplace le secteur retiré par une pièce ayant la même dimension suivant la direction axiale et la même dimension suivant la direction circonférentielle, mais ayant une épaisseur plus importante. Cette pièce est fixée au reste de l'anneau 20 par soudage de manière à reconstituer un anneau 20 fermé. Puis on usine le taquet 302, 304 dans ladite pièce d'épaisseur plus importante que le reste de l'anneau 20. Un tel mode opératoire permet d'effectuer un usinage précis des taquets 302, 304, en assurant leurs dimensions et leur position sur l'anneau 20.Preferably, each cleat 302, 304 is made in the following manner. Two cuts are made on the ring 20, so as to remove a ring sector having a given dimension in the circumferential direction of said ring 20 and the same dimension as the rest of the ring 20 in the axial direction. The removed sector is replaced by a part having the same dimension in the axial direction and the same dimension in the circumferential direction, but having a greater thickness. This piece is fixed to the rest of the ring 20 by welding so as to reconstitute a closed ring 20. Then the cleat 302, 304 is machined in said piece of greater thickness than the remainder of the ring 20. Such a procedure allows precise machining of the cleats 302, 304, ensuring their dimensions and their position on the ring 20.

La fente 24 est réalisée sur l'anneau 20 après la réalisation des deux taquets 302, 304. Elle est positionnée de telle manière que les deux taquets 302, 304 soient disposés du même côté de la fente 24, vers l'une des extrémités 26 de l'anneau 20. Le premier taquet 302 est plus proche de la fente 24 que le deuxième taquet 304.The slot 24 is formed on the ring 20 after the two tabs 302, 304 have been made. It is positioned in such a way that the two catches 302, 304 are arranged on the same side of the slot 24, towards one of the ends 26. of the ring 20. The first cleat 302 is closer to the slot 24 than the second cleat 304.

Chaque taquet 302, 304 comporte une face de contact 32. La face de contact 32 du deuxième taquet 304 est orientée du côté de la fente 24. La face de contact 32 du deuxième taquet 304 est orientée du côté opposé.Each cleat 302, 304 has a contact face 32. The contact face 32 of the second cleat 304 is oriented towards the slot 24. The contact face 32 of the second cleat 304 is oriented on the opposite side.

Avec une position appropriée des deux taquets 302, 304 sur l'anneau 20, lorsque l'anneau 20 est mis en place dans la gorge 22, la face de contact 32 de chaque taquet 302, 304 se trouve en butée contre l'une des faces latérales 144 du premier crochet 162. Les faces latérales 144 sont des faces de blocage du premier crochet 162, qui coopèrent avec les faces de contact 32 respectives des deux taquets 302, 304 de l'anneau 20. Les deux extrémités 26 de l'anneau 20 et la fente 24 se trouvent alors sous le deuxième crochet 164.With an appropriate position of the two cleats 302, 304 on the ring 20, when the ring 20 is placed in the groove 22, the contact face 32 of each cleat 302, 304 is in abutment against one of the side faces 144 of the first hook 162. The side faces 144 are locking faces of the first hook 162, which cooperate with the respective contact faces 32 of the two tabs 302, 304 of the ring 20. The two ends 26 of the ring 20 and the slot 24 are then under the second hook 164.

La position des deux taquets 302, 304 sur l'anneau 20 est établie de manière appropriée, de préférence en fonction des dimensions et distances du premier et du deuxième crochets 162, 164 du disque de rotor 10. La position du premier taquet 302 est définie pour que la fente 24 se trouve sous le deuxième crochet 164 tandis que la face de contact 32 du premier taquet 302 se trouve contre la face de blocage 144 du premier crochet 162. La position du deuxième taquet 304 est définie par la distance entre les deux taquets 302, 304, qui est sensiblement égale à la distance séparant les deux faces de blocage 144 du premier crochet 162.The position of the two tabs 302, 304 on the ring 20 is suitably set, preferably depending on the dimensions and distances of the first and second hooks 162, 164 of the rotor disc 10. The position of the first tab 302 is defined so that the slot 24 is under the second hook 164 while the contact face 32 of the first catch 302 is against the locking face 144 of the first hook 162. The position of the second stop 304 is defined by the distance between the two cleats 302, 304, which is substantially equal to the distance between the two locking faces 144 of the first hook 162.

Avec un tel dispositif d'immobilisation, l'anneau 20 est empêché de tourner dans la gorge 22. Par suite, il ne peut pas s'échapper de la gorge 22 lors du fonctionnement de la turbomachine. Il s'ensuit que les aubes 16 ne peuvent s'échapper suivant la direction de l'alvéole 13 dans laquelle elles sont insérées.With such an immobilizing device, the ring 20 is prevented from turning in the groove 22. As a result, it can not escape from the groove 22 during the operation of the turbomachine. It follows that the vanes 16 can not escape in the direction of the cell 13 in which they are inserted.

De manière avantageuse dans ce mode de réalisation, les deux taquets 302, 304 sont situés à proximité de la fente 24, ce qui permet de réduire les risques que l'extrémité 26 de l'anneau 20 située du même côté que les deux taquets 302, 304 ne s'échappe de la gorge 22.Advantageously in this embodiment, the two tabs 302, 304 are located near the slot 24, which reduces the risk that the end 26 of the ring 20 located on the same side as the two tabs 302 , 304 does not escape from the groove 22.

De manière avantageuse dans ce mode de réalisation, les deux taquets 302, 304 sont situés en amont de la fente 24 dans le sens de rotation du rotor, qui est désigné par le repère 80 sur la figure 3. Avec ce sens de rotation 80, c'est la face de blocage 144 du premier crochet 162 qui est en regard du deuxième crochet 164 qui joue principalement un rôle de blocage, en coopération avec le premier taquet 302 de l'anneau 20.Advantageously in this embodiment, the two tabs 302, 304 are located upstream of the slot 24 in the direction of rotation of the rotor, which is designated by the reference numeral 80 in FIG. 3. With this direction of rotation 80, it is the blocking face 144 of the first hook 162 which is opposite the second hook 164 which plays mainly a blocking function, in cooperation with the first catch 302 of the ring 20.

On va maintenant décrire le dispositif d'immobilisation, du disque de rotor 10, et de l'anneau 20 selon le deuxième mode de réalisation de l'invention, en se référant à la figure 4.The immobilizer, the rotor disk 10 and the ring 20 according to the second embodiment of the invention will now be described with reference to FIG. 4.

Parmi les crochets 6 se trouvent successivement un premier crochet 262 et un deuxième crochet 264.Among the hooks 6 are successively a first hook 262 and a second hook 264.

Les deux crochets 262, 264 ont une géométrie modifiée par rapport celle des crochets 6. Chaque crochet 262, 264 présente une face frontale 142 qui est la face de sa surface libre, et une face latérale 144 qui est sensiblement perpendiculaire à la face frontale 142 et en regard de l'autre crochet 264, 262. La face latérale 144 du premier crochet 262, respectivement du deuxième crochet 264, s'étend depuis la face frontale 142 dudit crochet 262, 264, jusqu'à la paroi interne de la gorge élémentaire dudit crochet 262, 264. De préférence, la face latérale 144 du premier crochet 262 est obtenue par usinage sur son côté latéral qui est en regard du deuxième crochet 264. De manière analogue, la face latérale 144 du deuxième crochet 264 est obtenue par usinage sur son côté latéral qui est en regard du premier crochet 262 En d'autres termes, chacune des dents 12 correspondantes se termine par un crochet 262, 264 qui présente une face latérale 144 sur son côté en regard de l'autre crochet 264, 262, ladite face latérale étant circonférentiellement en retrait.The two hooks 262, 264 have a modified geometry compared to that of the hooks 6. Each hook 262, 264 has a front face 142 which is the face of its free surface, and a lateral face 144 which is substantially perpendicular to the front face 142 and facing the other hook 264, 262. The lateral face 144 of the first hook 262, respectively of the second hook 264, extends from the front face 142 of said hook 262, 264, to the inner wall. of the elementary groove of said hook 262, 264. Preferably, the lateral face 144 of the first hook 262 is obtained by machining on its lateral side which is opposite the second hook 264. Similarly, the lateral face 144 of the second hook 264 is obtained by machining on its side side which is opposite the first hook 262 In other words, each of the corresponding teeth 12 ends with a hook 262, 264 which has a side face 144 on its side opposite the other hook 264, 262, said lateral face being circumferentially recessed.

Sur l'exemple illustré à la figure 4, les faces latérales 144 sont orientées selon un plan radial du disque de rotor 10.In the example illustrated in FIG. 4, the lateral faces 144 are oriented in a radial plane of the rotor disc 10.

L'anneau 20 comporte une fente 24 et un taquet unique 306 positionné sur sa face opposée à sa face en regard du disque de rotor 10. Le taquet 306 est de préférence réalisé suivant un procédé analogue a celui qui a été décrit pour la réalisation des taquets 302, 304 du premier mode de réalisation du dispositif d'immobilisation.The ring 20 has a slot 24 and a single lug 306 positioned on its face opposite its face facing the rotor disk 10. The cleat 306 is preferably made by a method similar to that described for the production of the cleats 302, 304 of the first embodiment of the immobilizer.

La fente 24 est réalisée sur l'anneau 20 après la réalisation du taquet 306. Elle est positionnée de telle façon que le taquet 306 soit disposé d'un côté de la fente 24 et à proximité de celle-ci, vers l'une des extrémités 26 de l'anneau 20.The slot 24 is made on the ring 20 after the embodiment of the catch 306. It is positioned in such a way that the catch 306 is disposed on one side of the slot 24 and close to it, towards one of the ends 26 of the ring 20.

Le taquet 306 comporte deux faces de contact 32. L'une des faces de contact 32 du taquet 306 est orientée du côté de la fente 24 et l'autre face de contact 32 est orientée du côté opposé.The cleat 306 has two contact faces 32. One of the contact faces 32 of the cleat 306 is oriented on the side of the slot 24 and the other contact face 32 is oriented on the opposite side.

Avec une position appropriée du taquet 306 sur l'anneau 20 et une dimension appropriée de ce taquet 306, lorsque l'anneau 20 est mis en place dans la gorge 22, chaque face de contact 32 du taquet 306 se trouve en butée contre la face latérale 144 du premier crochet 262 et contre la face latérale 144 du deuxième crochet 264. Les faces latérales 144 du premier crochet 162 et du deuxième crochet 164 sont des faces de blocage qui coopèrent avec les faces de contact 32 respectives du taquet 306 de l'anneau 20. Les deux extrémités 26 de l'anneau 20 et la fente 24 se trouvent alors sous le deuxième crochet 264.With an appropriate position of the cleat 306 on the ring 20 and a suitable dimension of this cleat 306, when the ring 20 is put in place in the groove 22, each contact face 32 of the cleat 306 is in abutment against the face lateral faces 144 of the first hook 262 and against the lateral face 144 of the second hook 264. The lateral faces 144 of the first hook 162 and the second hook 164 are locking faces which cooperate with the respective contact faces 32 of the cleat 306 of the 20. The two ends 26 of the ring 20 and the slot 24 are then under the second hook 264.

La position du taquet 306 sur l'anneau 20 et la largeur ou dimension circonférentielle du taquet 306 sont établies de manière appropriée, de préférence en fonction des dimensions et distances des crochets 262, 264 du disque de rotor 10. La distance entre le taquet 306 et la fente 24 est définie pour que la fente 24 se trouve sous le deuxième crochet 264 tandis que l'une des faces de contact 32 du taquet 306 se trouve contre l'une des deux faces de blocage 144 respective des deux crochets 262, 264. La largeur du taquet 306 est sensiblement égale à la distance qui sépare la face de blocage 144 du premier crochet 262 et la face de blocage 144 du deuxième crochet 264.The position of the cleat 306 on the ring 20 and the circumferential width or dimension of the cleat 306 are suitably set, preferably depending on the dimensions and distances of the hooks 262, 264 of the rotor disk 10. The distance between the cleat 306 and the slot 24 is defined so that the slot 24 is under the second hook 264 while one of the contact faces 32 of the catch 306 is against one of the two respective locking faces 144 of the two hooks 262, 264 The width of the catch 306 is substantially equal to the distance between the locking face 144 of the first hook 262 and the locking face 144 of the second hook 264.

Avec un tel dispositif d'immobilisation, l'anneau 20 est empêché de tourner dans la gorge 22. Par suite, il ne peut pas s'échapper de la gorge 22 lors du fonctionnement de la turbomachine. Il s'ensuit que les aubes 16 ne peuvent s'échapper suivant la direction axiale de l'alvéole 13 dans laquelle elles sont insérées.With such an immobilizing device, the ring 20 is prevented from rotating in the groove 22. As a result, it can not escape the groove 22 during operation of the turbomachine. It follows that the vanes 16 can not escape in the axial direction of the cell 13 in which they are inserted.

De manière avantageuse dans ce mode de réalisation, le taquet 306 est situé à proximité de la fente 24, ce qui permet de réduire les risques que l'extrémité 26 de l'anneau 20 située du même côté que le taquet 306 ne s'échappe de la gorge 22.Advantageously in this embodiment, the cleat 306 is located near the slot 24, which reduces the risk that the end 26 of the ring 20 located on the same side as the cleat 306 escapes. throat 22.

De manière avantageuse dans ce mode de réalisation, le taquet 306 est situé en amont de la fente 24 dans le sens de rotation du rotor, qui est désigné par le repère 80 sur la figure 4. Avec ce sens de rotation 80, c'est la face de blocage 144 du premier crochet 262 qui joue principalement un rôle de blocage, en coopération avec le taquet 306 de l'anneau 20.Advantageously in this embodiment, the cleat 306 is located upstream of the slot 24 in the direction of rotation of the rotor, which is designated by the reference 80 in FIG. 4. With this direction of rotation 80, it is the locking face 144 of the first hook 262 which plays mainly a blocking function, in cooperation with the cleat 306 of the ring 20.

L'invention qui vient d'être décrite permet donc d'empêcher l'anneau 20 de tourner dans la gorge 22. Elle présente l'avantage que la fente 24 de l'anneau 20 se trouve positionnée sous un crochet et non pas entre deux crochets.The invention which has just been described thus makes it possible to prevent the ring 20 from rotating in the groove 22. It has the advantage that the slot 24 of the ring 20 is positioned under a hook and not between two hooks.

Avec le dispositif d'immobilisation en rotation de l'anneau 20 selon l'invention, la fonction d'immobilisation proprement dite (par mise en butée des faces de contact 32 des taquets contre les faces de blocage 144 des crochets 162, 262, 264) et la fonction de recouvrement de la fente 24 ne sont pas assurées par un seul crochet de disque comme c'était le cas avec le dispositif d'immobilisation de la technique antérieure.With the immobilization device in rotation of the ring 20 according to the invention, the actual immobilization function (by abutting the contact faces 32 of the catches against the locking faces 144 of the hooks 162, 262, 264 ) and the overlap function of the slot 24 is not provided by a single disk hook as was the case with the immobilizer of the prior art.

Un avantage du dispositif d'immobilisation de l'anneau 20 selon l'invention, que ce soit selon le premier mode de réalisation ou selon le deuxième mode de réalisation, réside dans le fait qu'il est possible de dissocier la largeur de la fente 24, c'est-à-dire le jeu entre les deux extrémités ou brins 26 de l'anneau 20, du jeu nécessaire au montage de l'anneau 20 entre les faces en coopération, à savoir au moins l'une des faces de contact 32 et au moins l'une des faces de blocage 144.An advantage of the immobilization device of the ring 20 according to the invention, whether according to the first embodiment or according to the second embodiment, lies in the fact that it is possible to dissociate the width of the slot 24, that is to say the clearance between the two ends or strands 26 of the ring 20, the clearance necessary for mounting the ring 20 between the faces in cooperation, namely at least one of the faces of contact 32 and at least one of the locking faces 144.

Dans le premier mode de réalisation, le premier taquet 302 seul permettrait de remplir la fonction d'immobilisation en rotation de l'anneau 20, compte tenu du sens de rotation représenté par la flèche 80. Le deuxième taquet 304 permet, de plus, de maintenir l'ouverture de la fente 24 entre les deux brins 26, et d'éviter que ces deux brins 26 n'entrent en contact.In the first embodiment, the first cleat 302 alone would fulfill the immobilization function in rotation of the ring 20, taking into account the direction of rotation represented by the arrow 80. The second cleat 304 allows, in addition, maintain the opening of the slot 24 between the two strands 26, and prevent these two strands 26 come into contact.

Dans le deuxième mode de réalisation, la fonction d'immobilisation en rotation de l'anneau 20 est remplie par la mise en butée de l'une des faces de contact 32 du taquet 306 avec la face de blocage 144 du premier crochet d'immobilisation 262, compte tenu du sens de rotation représenté par la flèche 80. La mise en butée de l'autre des faces de contact 32 du taquet 306 avec la face de blocage 144 du deuxième crochet d'immobilisation 264 permet, de plus, de maîtriser la position du brin 26 portant le taquet 306 par rapport à l'autre brin 26, de maintenir l'ouverture de la fente 24 entre les deux brins 26, et d'éviter qu'ils n'entrent en contact. La mise en butée du taquet 306 contre le premier crochet 262 et contre le deuxième crochet 264 est réalisée en maîtrisant la dimension circonférentielle dudit taquet 306.In the second embodiment, the immobilization function in rotation of the ring 20 is filled by the abutment of one of the contact faces 32 of the catch 306 with the locking face 144 of the first immobilization hook. 262, taking into account the direction of rotation represented by the arrow 80. The abutment of the other of the contact faces 32 of the cleat 306 with the locking face 144 of the second immobilization hook 264 allows, moreover, to control the position of the strand 26 carrying the cleat 306 relative to the other strand 26, to maintain the opening of the slot 24 between the two strands 26, and to prevent them from coming into contact. The abutment of the cleat 306 against the first hook 262 and against the second hook 264 is achieved by controlling the circumferential dimension of said cleat 306.

Dans les deux modes de réalisation, la maîtrise du jeu circonférentiel, c'est-à-dire de l'ouverture de la fente 24, entre les deux brins 26 de l'anneau 20 a pour effet d'améliorer le maintien de ces deux brins 26 dans la gorge 22, et donc le maintien de l'anneau 20 dans la gorge 22.In both embodiments, the control of the circumferential clearance, that is to say the opening of the slot 24 between the two strands 26 of the ring 20 has the effect of improving the maintenance of these two. strands 26 in the groove 22, and thus the retention of the ring 20 in the groove 22.

L'invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits. Sur l'exemple illustré aux figures 3 et 4, la fente 24 est perpendiculaire à la direction circonférentielle de l'anneau 20, mais elle pourrait être oblique, sans sortir du cadre de l'invention.The invention is not limited to the embodiments that have just been described. In the example illustrated in Figures 3 and 4, the slot 24 is perpendicular to the circumferential direction of the ring 20, but it could be oblique, without departing from the scope of the invention.

Sur l'exemple illustré aux figures 3 et 4, les faces de blocage sont orientées selon un plan radial du disque de rotor, mais elles pourraient être orientées selon un plan oblique par rapport à un plan radial du disque de rotor, sans sortir du cadre de l'invention.In the example illustrated in FIGS. 3 and 4, the locking faces are oriented along a radial plane of the rotor disk, but they could be oriented in an oblique plane with respect to a radial plane of the rotor disk, without departing from the frame. of the invention.

Sur l'exemple illustré aux figures 3 et 4, les alvéoles 13 dans lesquelles sont insérés les pieds 14 des aubes 16 sont orientées axialement, mais l'invention s'applique également aux configurations dans lesquelles la direction des alvéoles forme un angle avec la direction axiale de la turbomachine.In the example illustrated in FIGS. 3 and 4, the cells 13 into which the feet 14 of the vanes 16 are inserted are oriented axially, but the invention also applies to configurations in which the direction of the cells forms an angle with the direction axial axis of the turbomachine.

Claims (20)

Dispositif d'immobilisation en rotation d'un anneau de rétention (20) d'aubes (16) sur un disque de rotor (10) d'une turbomachine suivant une direction sensiblement axiale de ladite turbomachine,
ledit disque de rotor (10) étant muni de crochets (6, 162, 164, 262, 264) répartis sur sa circonférence et définissant une gorge (22) pour recevoir ledit anneau de rétention (20), dont un premier (162, 262) et un deuxième (164, 264) crochets d'immobilisation successifs, et ledit anneau de rétention (20) étant muni d'une fente (24), et d'au moins un taquet (302, 304, 306) disposé sur une face de celui-ci près de ladite fente (24),
caractérisé en ce que la position dudit au moins un taquet (302, 304, 306) sur ledit anneau de rétention (20) est telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), ledit au moins un taquet (302, 304, 306) est en butée contre ledit premier crochet d'immobilisation (162, 262), et la fente (24) est recouverte par ledit deuxième crochet d'immobilisation (164, 264).Device for immobilization in rotation of a retaining ring (20) of vanes (16) on a rotor disc (10) of a turbomachine in a substantially axial direction of said turbomachine,
said rotor disc (10) having hooks (6, 162, 164, 262, 264) distributed around its circumference and defining a groove (22) for receiving said retention ring (20), a first one (162, 262 ) and a second (164, 264) successive immobilizing hooks, and said retaining ring (20) being provided with a slot (24), and at least one cleat (302, 304, 306) arranged on a face thereof near said slot (24),
characterized in that the position of said at least one cleat (302, 304, 306) on said retention ring (20) is such that when said retaining ring (20) is in place in said groove (22), said at least one cleat (302, 304, 306) abuts against said first immobilization hook (162, 262), and the slot (24) is covered by said second immobilization hook (164, 264). Dispositif d'immobilisation en rotation selon la revendication 1, caractérisé en ce que : ledit premier crochet d'immobilisation (162, 262) est doté d'une face de blocage (144) sur son côté qui est en regard du deuxième crochet d'immobilisation (164, 264), ledit taquet (302, 304, 306) de l'anneau de rétention (20) est doté d'une face de contact (32) sur son côté qui est opposé à son côté en regard de ladite fente (24), et ladite face de blocage (144) coopère avec ladite face de contact (32) pour une mise en butée dudit taquet (302, 304, 306) contre ledit premier crochet d'immobilisation (162, 262). Rotational immobilization device according to claim 1, characterized in that : said first immobilizing hook (162, 262) is provided with a locking face (144) on its side facing the second immobilizing hook (164, 264), said cleat (302, 304, 306) of the retaining ring (20) is provided with a contact face (32) on its side opposite its side facing said slot (24), and said locking face (144) cooperates with said contact face (32) for abutment of said cleat (302, 304, 306) against said first immobilization hook (162, 262). Dispositif d'immobilisation en rotation selon la revendication 1 ou 2,
caractérisé en ce qu'il comporte : - un premier (162) et un deuxième (164) crochets d'immobilisation successifs dudit disque de rotor (10), - un premier (302) et un deuxième (304) taquets de l'anneau de rétention (20), disposés sur une face de celui-ci du même côté de ladite fente (24), ledit premier taquet (302) étant plus proche que ledit deuxième taquet (304) de ladite fente (24), et en ce que les positions desdits premier (302) et deuxième (304) taquets sur l'anneau de rétention (20) sont telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), lesdits premier (302) et deuxième (304) taquets sont en butée contre ledit premier crochet d'immobilisation (162), de chaque côté de celui-ci, et ladite fente (24) est recouverte par ledit deuxième crochet d'immobilisation (164).Rotational immobilization device according to claim 1 or 2,
characterized in that it comprises: a first (162) and a second (164) successive immobilization hooks of said rotor disk (10), a first (302) and a second (304) latch of the retaining ring (20) disposed on one side thereof on the same side of said slot (24), said first cleat (302) being closer said second cleat (304) of said slot (24), and in that the positions of said first (302) and second (304) tabs on the retention ring (20) are such that, when said retention ring (20) is in place in said groove (22), said first (302) and second (304) tabs abut against said first immobilization hook (162) on each side thereof, and said slot (24) is covered by said second immobilization hook (164). Dispositif d'immobilisation en rotation selon la revendication 3, caractérisé en ce que : ledit premier crochet d'immobilisation (162) est doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (164) et d'une autre face de blocage (144) sur son côté opposé, lesdits taquets (302, 304) dudit anneau de rétention (20) sont dotés chacun d'une face de contact (32), la face de contact (32) dudit deuxième taquet (304) étant sur son côté qui est en regard de ladite fente (24), et la face de contact (32) dudit premier taquet (302) étant sur son côté qui est opposé à son côté en regard de ladite fente (24), et en ce que lesdites faces de blocage (144) coopèrent avec lesdites faces de contact (32) pour une mise en butée desdits taquets (302, 304) contre ledit premier crochet d'immobilisation (162). Rotational immobilization device according to claim 3, characterized in that : said first immobilizing hook (162) is provided with a locking face (144) on its side facing said second immobilizing hook (164) and another locking face (144) on its side. opposite, said cleats (302, 304) of said retaining ring (20) are each provided with a contact face (32), the contact face (32) of said second cleat (304) being on its side which is opposite said slot (24), and the contact face (32) of said first cleat (302) being on its side opposite its side facing said slot (24), and in that said locking faces (144) cooperate with said contact faces (32) for abutment of said cleats (302, 304) against said first immobilization hook (162). Dispositif d'immobilisation en rotation selon la revendication 1 ou 2,
caractérisé en ce qu'il comporte : - un premier (262) et un deuxième (264) crochets d'immobilisation successifs dudit disque de rotor (10), - un taquet unique (306) dudit anneau de rétention (20), disposé sur une face de celui-ci près de ladite fente (24), et en ce que la position dudit taquet (306) sur ledit anneau de rétention (20) est telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), ledit taquet (306) est en butée contre ledit premier crochet d'immobilisation (262) et contre ledit deuxième crochet d'immobilisation (264), et ladite fente (24) est recouverte par ledit deuxième crochet d'immobilisation (264).Rotational immobilization device according to claim 1 or 2,
characterized in that it comprises: a first (262) and a second (264) successive immobilization hooks of said rotor disk (10), a single cleat (306) of said retention ring (20) disposed on one side thereof near said slot (24), and in that the position of said latch (306) on said retention ring (20) is such that when said retention ring (20) is in place in said groove (22), said cleat (306) abuts against said first immobilization hook (262) and against said second immobilization hook (264), and said slot (24) is covered by said second locking hook (264). immobilization (264). Dispositif d'immobilisation en rotation selon la revendication 5, caractérisé en ce que : ledit premier crochet d'immobilisation (262) est doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (264), ledit deuxième crochet d'immobilisation (264) est doté d'une face de blocage (144) sur son côté qui est en regard dudit premier crochet d'immobilisation (262), ledit taquet (306) dudit anneau de rétention (20) est doté de deux faces de contact (32), l'une desdites faces de contact (32) étant sur son côté qui est en regard de ladite fente (24), et l'autre desdites faces de contact (32) étant sur son côté opposé, et en ce que lesdites faces de blocage (144) coopèrent avec lesdites faces de contact (32) pour une mise en butée desdits premier (262) et deuxième (264) crochets d'immobilisation contre ledit taquet (306). Rotational immobilization device according to claim 5, characterized in that : said first immobilization hook (262) is provided with a locking face (144) on its side facing said second immobilizing hook (264), said second immobilization hook (264) is provided with a locking face (144) on its side facing said first immobilizing hook (262), said cleat (306) of said retaining ring (20) is provided with two contact faces (32), one of said contact faces (32) being on its side facing said slot (24), and other of said contact faces (32) being on its opposite side, and in that said locking faces (144) cooperate with said contact faces (32) for abutment of said first (262) and second (264) immobilizing hooks against said cleat (306). Dispositif d'immobilisation selon l'une quelconque des revendications 2, 4 ou 6, dans lequel la gorge (22) a deux parois dont une paroi interne la plus proche du disque de rotor (10) et une paroi externe la plus éloignée du disque de rotor (10), caractérisé en ce que chaque face de blocage (144) est située sur ledit crochet d'immobilisation (162, 262, 264) correspondant, et s'étend suivant la direction axiale à partir de la surface libre dudit crochet d'immobilisation (162, 262, 264) jusqu'à la paroi interne de ladite gorge (22).Immobilizing device according to any one of claims 2, 4 or 6, wherein the groove (22) has two walls of which one inner wall the most close to the rotor disc (10) and an outer wall farthest from the rotor disc (10), characterized in that each locking face (144) is located on said corresponding immobilizing hook (162, 262, 264). and extends in the axial direction from the free surface of said immobilizing hook (162, 262, 264) to the inner wall of said groove (22). Dispositif d'immobilisation selon la revendication 2, 4, 6 ou 7, caractérisé en ce que chaque face de blocage (144) est orientée selon un plan radial dudit disque de rotor (10).Immobilizer according to claim 2, 4, 6 or 7, characterized in that each locking face (144) is oriented in a radial plane of said rotor disc (10). Dispositif d'immobilisation selon la revendication 2, 4, 6 ou 7, caractérisé en ce que chaque face de blocage (144) est orientée selon un plan oblique par rapport à un plan radial dudit disque de rotor (10).Immobilizer according to claim 2, 4, 6 or 7, characterized in that each locking face (144) is oriented in an oblique plane with respect to a radial plane of said rotor disc (10). Anneau de rétention (20) des aubes (16) d'un rotor de turbomachine, destiné à être associé à un disque de rotor muni de crochets (6, 162, 164) répartis sur sa circonférence, dont un premier crochet d'immobilisation (162) et un deuxième crochet d'immobilisation (164) successifs, ledit premier crochet d'immobilisation (162) étant doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (164) et d'une autre face de blocage (144) sur son côté opposé à son côté qui est en regard dudit deuxième crochet d'immobilisation (164), ledit anneau comportant une fente (24) et deux taquets (302, 304), disposés sur une face de cet anneau,
caractérisé en ce que lesdits deux taquets (302, 304) sont agencés du même côté de ladite fente (24), de manière à ce qu'ils puissent se trouver respectivement en butée contre l'une desdites deux faces de blocage (144) dudit premier crochet d' immobilisation (162).Retention ring (20) of the blades (16) of a turbomachine rotor, intended to be associated with a rotor disc provided with hooks (6, 162, 164) distributed around its circumference, including a first immobilization hook ( 162) and a second immobilization hook (164) in succession, said first immobilization hook (162) being provided with a locking face (144) on its side which is opposite said second immobilization hook (164) and another locking face (144) on its opposite side to its side facing said second hook immobilizer (164), said ring having a slot (24) and two catches (302, 304), arranged on one side of this ring,
characterized in that said two tabs (302, 304) are arranged on the same side of said slot (24), so that they can respectively abut against one of said two locking faces (144) of said first immobilization hook (162). Anneau de rétention (20) des aubes (16) d'un rotor de turbomachine, destiné à être associé à un disque de rotor muni de crochets (6, 262, 264) répartis sur sa circonférence, dont un premier crochet d'immobilisation (262) et un deuxième crochet d'immobilisation (264) successifs, ledit premier crochet d'immobilisation (162) étant doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (164), et ledit deuxième crochet d'immobilisation (264) étant doté d'une face de blocage (144) sur son côté qui est en regard dudit premier crochet d'immobilisation (262), ledit anneau comportant une fente (24),
caractérisé en ce que ledit anneau comporte de plus un taquet unique (306), disposé sur une face de celui-ci d'un côté de ladite fente (24) à proximité de celle-ci, de manière à ce que ledit taquet unique (306) puisse se trouver en butée contre la face de blocage (144) dudit premier crochet d'immobilisation (262) et la face de blocage (144) dudit second crochet d' immobilisation (264).Retention ring (20) of the blades (16) of a turbomachine rotor, intended to be associated with a rotor disk provided with hooks (6, 262, 264) distributed around its circumference, including a first immobilization hook ( 262) and a second immobilization hook (264) in succession, said first immobilization hook (162) being provided with a locking face (144) on its side which is opposite said second immobilization hook (164) , and said second immobilization hook (264) being provided with a blocking face (144) on its side facing said first immobilizing hook (262), said ring having a slot (24),
characterized in that said ring further includes a single cleat (306) disposed on one side thereof on one side of said slot (24) proximate thereto, such that said single cleat ( 306) can be in abutment with the locking face (144) of said first immobilization hook (262) and the locking face (144) of said second immobilization hook (264). Ensemble disque/anneau (10, 20) d'une turbomachine,
comportant un anneau de rétention (20) muni d'une fente (24),
et comportant un disque de rotor (10) muni de crochets (6, 162, 164, 262, 264) répartis sur sa circonférence et définissant une gorge (22) pour recevoir ledit anneau de rétention (20),
caractérisé en ce que ledit disque de rotor (10) comporte un premier crochet d'immobilisation (162, 262) et un deuxième crochet d'immobilisation (164, 264) successifs,
en ce que ledit anneau de rétention (20) comporte au moins un taquet (302, 304, 306) disposé sur une face de celui-ci près de ladite fente (24),
et en ce que la position dudit taquet (302, 304, 306) sur ledit anneau de rétention (20) est telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), ledit taquet (302, 304, 306) est en butée contre ledit premier crochet d'immobilisation (162, 262), et la fente (24) est recouverte par ledit deuxième crochet d'immobilisation (164, 264).Disk / ring assembly (10, 20) of a turbomachine,
having a retention ring (20) with a slot (24),
and having a rotor disc (10) provided with circumferentially spaced hooks (6, 162, 164, 262, 264) defining a groove (22) for receiving said retention ring (20),
characterized in that said rotor disk (10) has a first immobilization hook (162, 262) and a second immobilization hook (164, 264) in succession,
in that said retaining ring (20) has at least one cleat (302, 304, 306) disposed on one side thereof near said slot (24),
and in that the position of said cleat (302, 304, 306) on said retaining ring (20) is such that, when said retaining ring (20) is in place in said groove (22), said cleat (302, 304, 306) abuts against said first immobilization hook (162, 262), and the slot (24) is covered by said second immobilization hook (164, 264). Ensemble disque/anneau (10, 20) selon la revendication 12, caractérisé en ce que
ledit premier crochet d'immobilisation (162) est doté d'une face de blocage (144) sur son côté qui est en regard du deuxième crochet d'immobilisation (164),
ledit au moins un taquet (302, 304, 306) de l'anneau de rétention (20) est doté d'une face de contact (32) sur son côté qui est opposé à son côté en regard de ladite fente (24), et
ladite face de blocage (144) coopère avec ladite face de contact (32) pour une mise en butée dudit taquet (302, 304, 306) contre ledit premier crochet d'immobilisation (162).Disc / ring assembly (10, 20) according to claim 12, characterized in that
said first immobilizing hook (162) is provided with a locking face (144) on its side facing the second immobilizing hook (164),
said at least one cleat (302, 304, 306) of the retaining ring (20) is provided with a contact face (32) on its side opposite its side facing said slot (24), and
said locking face (144) cooperates with said contact face (32) for abutment of said cleat (302, 304, 306) against said first immobilization hook (162). Ensemble disque/anneau (10, 20) selon la revendication 12,
caractérisé en ce que ledit disque de rotor (10) comporte un premier crochet d'immobilisation (162) et un deuxième crochet d'immobilisation (164) successifs,
en ce que ledit anneau de rétention (20) comporte un premier (302) et un deuxième (304) taquets, disposés sur une face de celui-ci du même côté de ladite fente (24), ledit premier taquet (302) étant plus proche que ledit deuxième taquet (304) de ladite fente (24),
et en ce que les positions desdits premier (302) et deuxième (304) taquets sur l'anneau de rétention (20) sont telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), lesdits premier (302) et deuxième (304) taquets sont en butée contre ledit premier crochet d'immobilisation (162), de chaque côté de celui-ci, et ladite fente (24) est recouverte par ledit deuxième crochet d' immobilisation (164).Disk / ring assembly (10, 20) according to claim 12,
characterized in that said rotor disk (10) has a first immobilization hook (162) and a second immobilization hook (164) in succession,
in that said retaining ring (20) has a first (302) and a second (304) tab, disposed on one side thereof on the same side of said slot (24), said first tab (302) being further close to said second cleat (304) of said slot (24),
and in that the positions of said first (302) and second (304) tabs on the retention ring (20) are such that, when said retention ring (20) is in place in said groove (22), said first (302) and second (304) tabs abut against said first immobilization hook (162) on each side thereof and said slot (24) is covered by said second immobilization hook (164). Ensemble disque/anneau (10, 20) selon la revendication 14, caractérisé en ce que
ledit premier crochet d'immobilisation (162) est doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (164) et d'une autre face de blocage (144) sur son côté opposé,
lesdits taquets (302, 304) dudit anneau de rétention (20) sont dotés chacun d'une face de contact (32), la face de contact (32) dudit deuxième taquet (164) étant sur son côté qui est en regard de ladite fente (24), et la face de contact (32) dudit premier taquet (162) étant sur son côté qui est opposé à son côté en regard de ladite fente (24),
et en ce que lesdites faces de blocage (164) coopèrent avec lesdites faces de contact (32) pour une mise en butée desdits taquets (302, 304) contre ledit premier crochet d'immobilisation (162).Disc / ring assembly (10, 20) according to claim 14, characterized in that
said first immobilizing hook (162) is provided with a locking face (144) on its side facing said second immobilizing hook (164) and another locking face (144) on its side. opposite,
said cleats (302, 304) of said retaining ring (20) are each provided with a contact face (32), the contact face (32) of said second cleat (164) being on its side which is opposite said slot (24), and the contact face (32) of said first cleat (162) being on its side opposite its side facing said slot (24),
and in that said locking faces (164) cooperate with said contact faces (32) for abutment of said cleats (302, 304) against said first immobilization hook (162). Ensemble disque/anneau (10, 20) selon la revendication 12,
caractérisé en ce que ledit disque de rotor (10) comporte un premier crochet d'immobilisation (262) et un deuxième crochet d'immobilisation (264) successifs,
en ce que ledit anneau de rétention (20) comporte un taquet unique (306) disposé sur une face de celui-ci près de ladite fente (24),
et en ce que la position dudit taquet (306) sur ledit anneau de rétention (20) est telle que, lorsque ledit anneau de rétention (20) est en place dans ladite gorge (22), ledit taquet (306) unique est en butée contre ledit premier crochet d'immobilisation (262) et contre ledit deuxième crochet d'immobilisation (264), et ladite fente (24) est recouverte par ledit deuxième crochet d'immobilisation (264).Disk / ring assembly (10, 20) according to claim 12,
characterized in that said rotor disk (10) has a first immobilization hook (262) and a second immobilization hook (264) in succession,
in that said retaining ring (20) has a single lug (306) disposed on one side thereof near said slot (24),
and in that the position of said latch (306) on said retention ring (20) is such that when said retention ring (20) is in place in said groove (22), said single cleat (306) abuts against said first immobilization hook (262) and against said second immobilization hook (264), and said slot (24) is covered by said second hook of immobilization (264). Ensemble disque/anneau (10, 20) selon la revendication 16, caractérisé en ce que
ledit premier crochet d'immobilisation (262) est doté d'une face de blocage (144) sur son côté qui est en regard dudit deuxième crochet d'immobilisation (264),
ledit deuxième crochet d'immobilisation (264) est doté d'une face de blocage (144) sur son côté qui est en regard dudit premier crochet d'immobilisation (262),
ledit taquet (306) dudit anneau de rétention (20) est doté de deux faces de contact (32), l'une desdites faces de contact (32) étant sur son côté qui est en regard de ladite fente (24), et l'autre desdites faces de contact (32) étant sur son côté opposé,
et en ce que lesdites faces de blocage (144) coopèrent avec lesdites faces de contact (32) pour une mise en butée desdits premier (262) et deuxième (264) crochets d'immobilisation contre ledit taquet (306).Disc / ring assembly (10, 20) according to claim 16, characterized in that
said first immobilization hook (262) is provided with a locking face (144) on its side facing said second immobilizing hook (264),
said second immobilization hook (264) is provided with a locking face (144) on its side facing said first immobilizing hook (262),
said cleat (306) of said retaining ring (20) is provided with two contact faces (32), one of said contact faces (32) being on its side facing said slot (24), and other of said contact faces (32) being on its opposite side,
and in that said locking faces (144) cooperate with said contact faces (32) for abutment of said first (262) and second (264) immobilizing hooks against said cleat (306). Rotor de turbomachine, caractérisé en ce qu'il comporte un dispositif d'immobilisation selon l'une quelconque des revendications 1 à 9 et/ou un anneau de rétention (20) selon la revendication 10 ou 11, et/ou un ensemble disque/anneau (10, 20) selon l'une quelconque des revendications 12 à 17.Turbomachine rotor, characterized in that it comprises an immobilizing device according to any one of Claims 1 to 9 and / or a retention ring (20) according to claim 10 or 11, and / or a disk / ring assembly (10, 20) according to any one of claims 12 to 17. Turbomachine, caractérisée en ce qu'elle comporte un dispositif d'immobilisation selon l'une quelconque des revendications 1 à 9 et/ou un anneau de rétention (20) selon la revendication 10 ou 11, et/ou un ensemble disque/anneau (10, 20) selon l'une quelconque des revendications 12 à 17.Turbomachine, characterized in that it comprises an immobilizing device according to any one of claims 1 to 9 and / or a retention ring (20) according to claim 10 or 11, and / or a disk / ring assembly ( 10, 20) according to any one of claims 12 to 17. Turbomachine selon la revendication 19, caractérisée en ce qu'elle est un moteur d'aéronef.Turbomachine according to Claim 19, characterized in that it is an aircraft engine.
EP06119579A 2005-08-31 2006-08-25 Locking appartus for an axial retention ring of a blade Active EP1760258B1 (en)

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FR0552635A FR2890104A1 (en) 2005-08-31 2005-08-31 Rotation blocking device for use in turbomachine rotor of aircraft engine, has ring with split and set of cleat, which is arranged on ring and placed in groove of rotor disk that includes blocking hook with check face

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FR2729709A1 (en) * 1995-01-25 1996-07-26 Snecma Turbine rotor seal and retainer
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Cited By (9)

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Publication number Priority date Publication date Assignee Title
FR2951224A1 (en) * 2009-10-13 2011-04-15 Turbomeca TURBINE WHEEL EQUIPPED WITH AXIAL RETAINING JONC LOCKING BLADES IN RELATION TO A DISK
WO2011045520A1 (en) * 2009-10-13 2011-04-21 Turbomeca Turbine wheel having an axial retaining ring locking the blades in relation to a disc
RU2550226C2 (en) * 2009-10-13 2015-05-10 Турбомека Turbine impeller and gas-turbine engine
US9163520B2 (en) 2009-10-13 2015-10-20 Turbomeca Turbine wheel fitted with an axial retaining ring that locks the blades relative to a disk
FR2974142A1 (en) * 2011-04-14 2012-10-19 Snecma Immobilization device for ring used for retaining radial blade on disc of rotor of turboshaft engine, has stop including support face that is tilted relative to axial median plane of stop such that face is directed radially toward outside
EP2722484A3 (en) * 2012-10-18 2017-09-27 General Electric Company Systems and methods to axially retain blades
FR3000763A1 (en) * 2013-01-04 2014-07-11 Snecma ROTOR DISC WITH A PLURALITY OF HOOKS
US9689278B2 (en) 2013-01-04 2017-06-27 Snecma Rotor disk including a plurality of hooks
FR3029962A1 (en) * 2014-12-11 2016-06-17 Snecma AXIAL BLOCKING OF AUBES IN A TURBOMACHINE WHEEL

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CA2557765A1 (en) 2007-02-28
US7290988B2 (en) 2007-11-06
DE602006003155D1 (en) 2008-11-27
CA2557765C (en) 2013-07-02
EP1760258B1 (en) 2008-10-15
US20070048141A1 (en) 2007-03-01
EP1760258A3 (en) 2007-08-01
FR2890104A1 (en) 2007-03-02

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