EP4581243A1 - Clinquant pour disque de turbine de turbomachine, ensemble pour rotor de turbomachine, rotor de turbomachine, turbomachine et procédé de montage d'un ensemble pour rotor de turbomachine - Google Patents
Clinquant pour disque de turbine de turbomachine, ensemble pour rotor de turbomachine, rotor de turbomachine, turbomachine et procédé de montage d'un ensemble pour rotor de turbomachineInfo
- Publication number
- EP4581243A1 EP4581243A1 EP23776422.0A EP23776422A EP4581243A1 EP 4581243 A1 EP4581243 A1 EP 4581243A1 EP 23776422 A EP23776422 A EP 23776422A EP 4581243 A1 EP4581243 A1 EP 4581243A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tooth
- disc
- foil
- blade
- rotor
- 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
- F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
-
- 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
- F05D2230/50—Building or constructing in particular ways
- F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing
Definitions
- TITLE FOIL FOR TURBOMACHINE TURBINE DISC, ASSEMBLY FOR TURBOMACHINE ROTOR, TURBOMACHINE ROTOR, TURBOMACHINE AND METHOD FOR ASSEMBLY OF AN ASSEMBLY FOR TURBOMACHINE ROTOR
- the present invention relates to a foil for a turbomachine turbine disk. It also relates to a rotor assembly comprising such a foil mounted around a tooth of the disc. It also relates to a method of assembling this assembly.
- the invention finds applications in the field of aeronautics and, in particular, in the field of turbomachine rotors to protect both the blade root and the rim of the disc and increase the lifespan of the rotors.
- a rotor blade 10 an example of which is shown in Figure 1, comprises a blade 12 provided, in the lower part, with a platform 11 extended radially by a foot 20 intended to be inserted into a cavity formed in the external periphery of a rotor disk.
- the foot 20 of the blade 10 of the rotor - also called moving blade - is retained radially in the cavity of the disc by cooperation of shapes between said foot, generally in the shape of a dovetail, and the cavity, generally in the shape of a alveolus.
- the blade 12 is provided with a heel 13 intended to be arranged edge to edge with the heel of the adjacent moving blades so as to form a rotating circumferential crown delimiting a surface of revolution around the axis of rotation disk.
- the foil is a foil for a moving blade, mounted around the foot 20 of said moving blade.
- This foil, referenced 30, is in contact with the disc and takes up a major part of the energy dissipated by friction in the contact between the root of the moving blade and the disc, which makes it possible to limit the wear of said blade root.
- FIG 2 represents, in an enlarged manner, the foot 20 of the movable blade 10 of Figure 1, around which a conventional foil 30 is mounted.
- This foil 30 has an overall U-shaped section, formed by two lateral branches 32, or lateral surfaces (only one of which is visible in Figure 2), intended to cover the lateral flanks 22 of the root 20 of the movable blade 10 and to maintain the foil 30 on the blade root 20.
- the foil 30 also includes a base 31, also called lower surface, which connects the side surfaces 32 together and covers the lower face 21 of the blade root 20.
- the foil 30 therefore has a function of protecting the blade root and the disc cavity by preventing wear of these parts. It thus guarantees the mechanical integrity of the parts (blade root and disc) with which it is in contact.
- the foils tend to move axially, which damages the radial tabs 33 and even cuts them. Indeed, due to their radial folding during the manufacturing phase and/or their unfolding during the assembly phase, the radial tabs are weakened and the friction, generated by the repeated axial movement of the foils, has the effect of cut or break them. Once the radial tabs are broken, the foils 30 can partially or even completely disengage from the blade roots 20, as shown in Figure 3. [0010] The disengagement of one (or more) foil 30 can cause the foil to be released into the air stream of the turbomachine and damage the blades located downstream of the Low Pressure Turbine, and in particular the base blades.
- TiAI titanium aluminides
- FIG. 4 A sectional view of a blade root 20 mounted in a cavity 41 of the disc 40 is shown in Figure 4.
- This view of Figure 4 shows the disc 40 in which the root 20 of the movable blade 10 is housed It also shows the hook 15 of the movable blade 10, projecting from the downstream face, into which a retaining part called retaining ring 50 is slipped.
- the retaining ring 50 extends circularly along the face downstream of the disc 40 so as to retain all of the blade roots 20 in the cavities of the disc and prevent any axial movement of said blade roots towards the downstream.
- the retaining ring 50 is therefore in contact not only with the downstream face of the blade roots 20, but also with the downstream rim 46 of the disc 40, at the level of the teeth of the disc.
- This contact between the retaining ring 50 and the downstream rim of the teeth of the disc generates zones 48 of contact wear, as shown in Figure 5.
- Each zone 48 of contact wear induces a risk of initiation and propagation of cracks which have a real impact on the lifespan of the disc.
- a crack initiated by contact wear leads to premature removal of the disc followed by repair or replacement of said disc.
- removing and repairing or replacing the disk causes significant costs in terms of parts and labor, as well as downtime of the turbomachine.
- a foil for a turbine disc positioned at least partly around a tooth of the disc and extending, on the one hand, along the rim of the disc and, on the other hand, between the side wall of the cavity of the disc and the foot of the moving blade.
- the invention relates to a foil for a turbomachine turbine disk, comprising an envelope at least partially surrounding a tooth of the turbine disk, said tooth separating a first and a second cavities of the disk, each adapted to receive a foot of a moving blade of the turbine, characterized in that the envelope is adapted to cover at least partially the side walls of the tooth as well as a downstream rim of said tooth.
- the foil according to the invention has the advantage of protecting not only the contact zone between the blade root and the cavity of the disc but also the contact zone between the retaining ring and the rim of the disc. It also makes it possible to avoid the risk of disengagement of the foil.
- the terms “lower”, “upper”, “internal” and “external” are interpreted with reference to the position of a part or a surface relative to the axis of rotation of the turbomachine, a lower or internal surface being closer to the axis of rotation than an external or external surface.
- the term “lateral” is interpreted as “which is located on the sides of a part which extends radially” along an axis substantially perpendicular to the axis of rotation direction of the axis of rotation” and the term “radial” as “in a direction perpendicular to the axis of rotation” or “in the direction of a radius of the blade ring”.
- upstream and “downstream” will be interpreted with reference to the direction of flow of the air flow in the turbomachine.
- the foil for turbine disk according to one aspect of the invention may have one or more complementary characteristics among the following, considered individually or in all technically possible combinations :
- the foil completely circumferentially covers a part of the downstream rim of the tooth, the part of the downstream rim of the tooth being delimited radially between the top of the tooth and a tangent line whose plane parallel to the x axis passes by the ends of the surfaces of the tooth opposite the top.
- the foil comprises two lateral longitudinal edges each extending in an area covered by a main surface adapted to cover an external face of the tooth of the disc.
- the two lateral longitudinal edges are parallel and are spaced from each other at a distance less than the circumferential width of the main surface.
- the two lateral longitudinal edges connect an external surface of the foil and an internal surface of the foil adapted to be facing the tooth. It comprises a main surface adapted to cover an external face of the tooth of the disc, a first and a second side surfaces extending from the main surface to cover side walls of the disc tooth, and a downstream surface extending between the main surface and the side surfaces to at least partially cover a downstream rim of the disc tooth.
- the tongue(s) is formed as an extension of the main surface and folded along the upstream rim.
- the envelope is formed from a metal sheet.
- a second aspect of the invention relates to an assembly for a turbomachine rotor, comprising: at least a first and a second movable blade configured to be movable in rotation around an axis of rotation of the rotor and each comprising a foot blade provided with a lower face and two lateral sides extending on either side of the lower face, a disc comprising at least a first and a second cavities adapted to each receive a blade root, and a tooth separating the first and second cavities, and a foil according to the first aspect of the invention.
- the first lateral surface of the foil is housed between one of the side walls of the tooth of the disc and the lateral flank of the blade root of the first moving blade and the second lateral surface of the foil is housed between another of the side walls of the tooth of the disc and the lateral side of the blade root of the second moving blade.
- a third aspect of the invention relates to a method of mounting a rotor assembly for a turbomachine according to the second aspect.
- This process is characterized by the fact that it includes the following steps: positioning a foil according to the first aspect of the invention around a tooth of the disc so that said foil covers at least the side walls and the downstream rim of the tooth of the disc, folding of at least one tab so positioning it along the upstream rim of the tooth of the disc, and installing the first blade root in the first cavity of the disc and the second blade root in the second cavity so that a portion of the foil is positioned between the first blade root and one of the side walls of the disc tooth and another portion of the foil is positioned between the second blade root and the other side wall of the disc tooth.
- a fourth aspect of the invention concerns a turbomachine rotor, characterized in that it comprises a plurality of assemblies as defined above, juxtaposed circularly next to each other.
- a fifth aspect of the invention concerns a turbomachine, characterized in that it comprises a plurality of assemblies as defined above, mounted so as to form a rotor.
- Figure 1 already described, represents a schematic perspective view of a moving blade of a turbomachine according to the state of the art
- Figure 2 already described, represents a schematic perspective view of a movable blade root equipped with foil according to the state of the art
- Figure 3 already described, schematically represents a perspective view of a broken foil, in the process of disengagement of the blade root;
- Figure 5 already described, schematically represents a perspective view of a portion of a disc rim prematurely worn by contact with a retaining ring;
- Figure 6 schematically represents a perspective view of a disc tooth equipped with a foil according to one embodiment of the invention when a blade root is mounted in the cavity adjacent to the tooth;
- Figure 7 schematically represents a perspective view of a foil for a turbine disk according to a preferred embodiment of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2208784A FR3139363B1 (fr) | 2022-09-01 | 2022-09-01 | Clinquant pour disque de turbine de turbomachine, ensemble pour rotor comportant un tel clinquant et procédé de montage d’un tel ensemble |
| PCT/FR2023/051320 WO2024047319A1 (fr) | 2022-09-01 | 2023-09-01 | Clinquant pour disque de turbine de turbomachine, ensemble pour rotor de turbomachine, rotor de turbomachine, turbomachine et procédé de montage d'un ensemble pour rotor de turbomachine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4581243A1 true EP4581243A1 (fr) | 2025-07-09 |
Family
ID=84053332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23776422.0A Pending EP4581243A1 (fr) | 2022-09-01 | 2023-09-01 | Clinquant pour disque de turbine de turbomachine, ensemble pour rotor de turbomachine, rotor de turbomachine, turbomachine et procédé de montage d'un ensemble pour rotor de turbomachine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4581243A1 (fr) |
| CN (1) | CN119816658A (fr) |
| FR (1) | FR3139363B1 (fr) |
| WO (1) | WO2024047319A1 (fr) |
Families Citing this family (2)
| 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 |
| FR3165470A1 (fr) * | 2024-08-09 | 2026-02-13 | Safran Aircraft Engines | Outil et procédé de pliage d’un clinquant pour une aube mobile de roue de rotor dans une turbomachine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290466B1 (en) * | 1999-09-17 | 2001-09-18 | General Electric Company | Composite blade root attachment |
| FR2918702B1 (fr) * | 2007-07-13 | 2009-10-16 | Snecma Sa | Clinquant pour aube de turbomachine |
| FR2981132B1 (fr) * | 2011-10-10 | 2013-12-06 | Snecma | Ensemble pour turbomachine a refroidissement de disque |
-
2022
- 2022-09-01 FR FR2208784A patent/FR3139363B1/fr active Active
-
2023
- 2023-09-01 WO PCT/FR2023/051320 patent/WO2024047319A1/fr not_active Ceased
- 2023-09-01 CN CN202380063489.4A patent/CN119816658A/zh active Pending
- 2023-09-01 EP EP23776422.0A patent/EP4581243A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3139363A1 (fr) | 2024-03-08 |
| FR3139363B1 (fr) | 2025-05-23 |
| CN119816658A (zh) | 2025-04-11 |
| WO2024047319A1 (fr) | 2024-03-07 |
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