EP4536940A1 - Dispositif de retenue axiale des aubes mobiles d'une turbine bp dans les alvéoles d'un disque de rotor de la turbine bp et procédé de montage de ces aubes mobiles - Google Patents
Dispositif de retenue axiale des aubes mobiles d'une turbine bp dans les alvéoles d'un disque de rotor de la turbine bp et procédé de montage de ces aubes mobilesInfo
- Publication number
- EP4536940A1 EP4536940A1 EP23730853.1A EP23730853A EP4536940A1 EP 4536940 A1 EP4536940 A1 EP 4536940A1 EP 23730853 A EP23730853 A EP 23730853A EP 4536940 A1 EP4536940 A1 EP 4536940A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- wall
- blade
- stop
- face
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
-
- 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
-
- 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
- F01D5/3084—Fixing blades to rotors; Blade roots ; Blade spacers the blades being made of ceramics
-
- 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
- F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
-
- 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
- F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/603—Composites; e.g. fibre-reinforced
- F05D2300/6033—Ceramic matrix composites [CMC]
Definitions
- TITLE Device for axially retaining the moving blades of a LP turbine in the cells of a rotor disc of the LP turbine and method of mounting these moving blades
- the present invention relates to a device for axially retaining the moving blades of a low pressure (LP) turbine in the cells of the rotor disk of the LP turbine. It also relates to a method of mounting these moving blades in the rotor disk.
- LP low pressure
- This device allows axial stopping or blocking of the blade roots in the cells of the disc without requiring any hook on the blade, nor any specific part on the downstream face of the blade wheel. It thus avoids the need for an axial retaining ring whose centrifugal force would have to be taken up by a hook integrated into the CMC blade. It also has the advantage of having a reduced footprint, saving space downstream of the blade root so as to leave space to achieve axial sealing.
- the axial retaining device may have one or more complementary characteristics among the following, considered individually or in all technically possible combinations:
- the stop piece is a one-piece metal piece.
- the first wall of the stop piece has a width or height dimension, which is greater than another width or height dimension of the second wall, the dimensions being taken in a plane transverse to the connecting surface.
- the first wall is configured to extend partly over an upstream face of the rotor disk.
- the first wall of the stop piece extends perpendicularly on either side of the connecting surface.
- the second wall of the stopping piece extends perpendicular to the connecting surface so as to be able to cover a downstream face of a blade root.
- a second aspect of the invention relates to a turbomachine rotor assembly comprising a rotor disk of axis of the disc each delimiting a tooth of the disc, characterized in that it comprises: several stopping pieces as defined above, each stopping piece being intended to axially maintain a movable blade in a corresponding cell of the disc, and , means for blocking the stop pieces against the disc, the first wall of each stop piece extending circumferentially so as to be in contact with at least one upstream face of a tooth of the rotor disc.
- a third aspect of the invention relates to a method of mounting the moving blades of a low pressure turbine in cells of a rotor disk of said turbine, characterized in that it comprises, for each moving blade, the steps following: installation of a stop part as defined previously against a radially internal end face of a blade root, and installation of the movable blade equipped with the stop part in a cell of the disk of rotor.
- This process has the advantage of being relatively simple to implement.
- the method comprises the following operations: installation of the stop ring in a groove of the rotor disk, and installation of a retaining ring on the disk along the first walls of the stop piece, the retaining ring being held in position by a blocking effected by the retaining ring.
- Figure 6 represents, in perspective views, several stages of the method of mounting the moving blades according to the invention.
- the stop piece 40 comprises: a first wall 41, also called upstream wall, configured to be positioned at least partially along the upstream face 11 a of the blade root, a second wall 42, also called wall downstream, configured to be positioned at least partially along the downstream face 11 b of the blade root, and a connecting surface 43 connecting axially (that is to say along the central axis (X) the upstream wall 41 and the downstream wall 42, along the internal face 11c of the blade root.
- the upstream and downstream walls of the stop piece 40 can, for example, be made of metal or of an alloy, such as one of the superalloys conventionally used in this area of the turbine.
- the upstream 41 and downstream 42 walls are, for example, square or rectangular in shape.
- the connecting surface 43 can be a plate, preferably in the same metal or alloy as the upstream and downstream walls.
- the connecting surface 43 is preferably rectangular in shape, with an axial dimension substantially greater than the axial dimension of the root 11 of the blade.
- the upstream 41 and downstream 42 walls as well as the connecting surface 43 can be made in one piece so that the stop piece 40 is in one piece.
- the upstream wall 41 and the downstream wall 42 of the stopping part have similar dimensions.
- the upstream wall 41 and the downstream wall 42 have different dimensions, the upstream wall 41 having dimensions greater than those of the downstream wall 42.
- the upstream wall 41 can extend radially (that is to say along an axis perpendicular to the axis X) in front of the upstream face 11a of the blade root and in front of the part of the upstream face of the disc 20 under the alveolus.
- the upstream wall 41 can thus extend parallel to the upstream opening 21 a of the cell 21 and to the internal part of the upstream face of the disc 20 (the internal part being the part of the disc devoid of inter-cell teeth 22 ).
- the downstream wall 42 extends radially in front of the downstream opening 21 b of the cell 21, that is to say along the downstream face 11 b of the blade root.
- the stop piece 40 thus presents, in the example of Figures 2 and 3, a section in the shape of an inverted T, with an upstream wall 41 which extends radially on either side of the connecting surface 43 and a downstream wall 42 which extends radially in direction of the platform 12 of the blade 10. With such a configuration, the upstream wall 41 is blocked, upstream, by the disc 20 so that the stop piece 40 in its entirety is blocked axially at the upstream.
- the axial retaining device 30 of the invention may comprise, in addition to the stop piece 40, a flange 50, or retaining ring, mounted radially along the upstream face 20a of the disc 20.
- This flange 50 of annular shape, extends parallel to the cells 21 and to the inter-cell teeth 22 of the disc 20 over the entire circumferential length of the disc.
- This flange 50 whose shape is classic for a LP turbine flange, comprises a hook 51 partially housed in a groove 23 of the disc 20. This hook 51 ensures the attachment of the flange 50 to the disc 20.
- the flange 50 extends upstream of the upstream wall 41 of the stop piece 40 so as to prevent any axial movement, from downstream to upstream, of the stop piece 40.
- stop piece 40 is blocked axially in a bidirectional manner, that is to say both from upstream to downstream and from downstream to upstream.
- the blade root 11 positioned inside the stop piece 40 is also blocked axially in a bidirectional manner.
- the axial retaining device 30 also comprises an axial stop ring 60 housed in the groove 23 of the disc 20.
- This axial stop ring 60 is a substantially annular part, made of a material flexible, substantially elastic, like the superalloys conventionally used in turbines.
- the axial stop ring 60 comprises a radial slot extending over the entire section of said stop ring. This radial slot allows it to be lowered into the groove 23 to insert (or remove) the flange 50.
- Figure 4 shows embodiments in which the stop piece 40 has different shapes.
- Drawing A of Figure 4 shows, in a sectional view, an example of a stop piece 40 comprising an upstream wall 41 equipped with a shoulder 44 inserting inside the disk 20.
- This shoulder 44 also called hook, is formed by an axial extension extending at a substantially right angle in the extension of the upstream wall 41.
- This axial extension is configured to fit into a suitable housing 24 located at the entrance to the groove 23 of the disc 20.
- the shoulder 44 has the shape of a hook, a portion of which is housed in the disc 20.
- Drawing B and drawing C of Figure 4 show, respectively a sectional view and a schematic view of the upstream, an example of stop piece 40 in which the upstream wall 41 extends radially up to to the platform 12 of the blade 10 so as to create a partial seal of the cells 21.
- the stop piece 40 has a substantially U-shaped section, with an upstream wall 41 extending in a single radial direction from the connecting surface 43; the upstream wall 41 extends further radially than the downstream wall 42, up to the platform 12 of the blade.
- the axial blocking, or stopping, towards the downstream is obtained, in this embodiment, by blocking the upstream wall 41 against the teeth 22 of the disc 20.
- the axial retaining device 30 is mounted in the manner indicated in Figure 6.
- the assembly method according to the invention comprises the following steps, represented by drawings E to H:
- Drawing G installation of the moving blade 10 equipped with the stop piece 40 in a cell 21 of the disc 20, the upstream wall 41 of the stop piece being in contact with the teeth 22 located on either side from cell 21;
- the flange 50 ensures not only the axial stopping of the blade roots 11, via the stopping parts 40, but also the ventilation of the cells 21 of the disc. In fact, the breakdown of cells 21 of the disc 20 is necessary during the operation of the turbomachine taking into account the high temperature of the gases circulating in the flow path of the LP turbine.
- the axial retaining device according to the invention comprises various variants, modifications and improvements which will be obvious to those skilled in the art, it being understood that these variants, modifications and improvements are part of the scope of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2205682A FR3136507B1 (fr) | 2022-06-13 | 2022-06-13 | Dispositif de retenue axiale des aubes mobiles d’une turbine BP dans les alvéoles d’un disque de rotor de la turbine BP et procédé de montage de ces aubes mobiles |
| PCT/FR2023/050746 WO2023242490A1 (fr) | 2022-06-13 | 2023-05-29 | Dispositif de retenue axiale des aubes mobiles d'une turbine bp dans les alvéoles d'un disque de rotor de la turbine bp et procédé de montage de ces aubes mobiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4536940A1 true EP4536940A1 (fr) | 2025-04-16 |
Family
ID=84053064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23730853.1A Pending EP4536940A1 (fr) | 2022-06-13 | 2023-05-29 | Dispositif de retenue axiale des aubes mobiles d'une turbine bp dans les alvéoles d'un disque de rotor de la turbine bp et procédé de montage de ces aubes mobiles |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250341167A1 (fr) |
| EP (1) | EP4536940A1 (fr) |
| CN (1) | CN119365665A (fr) |
| FR (1) | FR3136507B1 (fr) |
| WO (1) | WO2023242490A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3161241B1 (fr) * | 2024-04-16 | 2026-03-20 | Safran Aircraft Engines | Organe de protection et d’étanchéité pour roue de turbine |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045329A (en) * | 1959-07-30 | 1962-07-24 | Gen Electric | Method for assembling tongue-and-groove members with locking keys |
| US3216699A (en) * | 1963-10-24 | 1965-11-09 | Gen Electric | Airfoil member assembly |
| US3378230A (en) * | 1966-12-16 | 1968-04-16 | Gen Electric | Mounting of blades in turbomachine rotors |
| US3653781A (en) * | 1970-12-18 | 1972-04-04 | Gen Electric | Turbomachinery blade retainer |
| DE2639200A1 (de) * | 1976-08-31 | 1978-03-09 | Volkswagenwerk Ag | Laufrad fuer axialturbinen, insbesondere fuer gasturbinen |
| US4890981A (en) * | 1988-12-30 | 1990-01-02 | General Electric Company | Boltless rotor blade retainer |
| US6109877A (en) * | 1998-11-23 | 2000-08-29 | Pratt & Whitney Canada Corp. | Turbine blade-to-disk retention device |
| FR2890684B1 (fr) * | 2005-09-15 | 2007-12-07 | Snecma | Clinquant pour aube de turboreacteur |
| US20090060746A1 (en) * | 2007-08-30 | 2009-03-05 | Honeywell International, Inc. | Blade retaining clip |
| FR2921409B1 (fr) * | 2007-09-25 | 2009-12-18 | Snecma | Clinquant pour aube de turbomachine. |
| DE102015116935A1 (de) * | 2015-10-06 | 2017-04-06 | Rolls-Royce Deutschland Ltd & Co Kg | Sicherungsvorrichtung zur axialen Sicherung einer Laufschaufel und Rotorvorrichtung mit einer derartigen Sicherungsvorrichtung |
| DE102017207445A1 (de) * | 2017-05-03 | 2018-11-08 | MTU Aero Engines AG | Verschleißschutzblech für eine Laufschaufel einer Gasturbine |
| FR3107922B1 (fr) * | 2020-03-03 | 2023-06-16 | Safran Aircraft Engines | Clinquant pour aube mobile de turbomachine |
-
2022
- 2022-06-13 FR FR2205682A patent/FR3136507B1/fr active Active
-
2023
- 2023-05-29 US US18/873,586 patent/US20250341167A1/en active Pending
- 2023-05-29 WO PCT/FR2023/050746 patent/WO2023242490A1/fr not_active Ceased
- 2023-05-29 EP EP23730853.1A patent/EP4536940A1/fr active Pending
- 2023-05-29 CN CN202380046536.4A patent/CN119365665A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250341167A1 (en) | 2025-11-06 |
| CN119365665A (zh) | 2025-01-24 |
| WO2023242490A1 (fr) | 2023-12-21 |
| FR3136507B1 (fr) | 2025-10-10 |
| FR3136507A1 (fr) | 2023-12-15 |
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