EP4121637A1 - Ensemble rotatif pour turbomachine comprenant une piece annulaire de serrage - Google Patents
Ensemble rotatif pour turbomachine comprenant une piece annulaire de serrageInfo
- Publication number
- EP4121637A1 EP4121637A1 EP21716504.2A EP21716504A EP4121637A1 EP 4121637 A1 EP4121637 A1 EP 4121637A1 EP 21716504 A EP21716504 A EP 21716504A EP 4121637 A1 EP4121637 A1 EP 4121637A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular
- abradable
- support
- foot
- rotary assembly
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
- F01D11/122—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with erodable or abradable material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/11—Shroud seal segments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/24—Rotors for turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/55—Seals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- Rotary assembly for a turbomachine comprising an annular clamping part.
- This presentation relates to a turbomachine assembly such as a turbine or a compressor, in which radial clearances are established in operation between the stator parts (fixed parts) fixed to the casing of the turbomachine and the rotor parts ( moving parts) integral in rotation inside the casing.
- This presentation is primarily concerned with the field of aircraft turbojets but can be applied more generally to any type of turbomachine.
- the heads of the movable blades of the rotor are generally equipped with wipers adapted to cut a track of abradable material carried by the stator, thus ensuring the tightness of the vein at the head of the moving vanes.
- a similar device is provided for fixed vanes (or distributors): a so-called “labyrinth” ferrule is in fact provided between two wheels of mobile vanes and carries wipers adapted to cut a track of abradable material carried by the root of the fixed vanes. , thus ensuring the tightness of the vein at the base of the fixed blades.
- a drawback of current turbines lies in the fact that the differential expansion appearing between the labyrinth shell, or the annular support carrying the abradable, and the members on which they are mounted - here the foot - generates significant mechanical stresses to the interface between these parts, leading to their early damage and therefore a reduction in their service life.
- This presentation relates to a rotary assembly for a turbomachine comprising a rotor comprising: at least two consecutive rotor stages provided with a plurality of mobile blades and, an annular rotor shell connecting said two consecutive rotor stages, a stator comprising: at least one stator stage provided between said two consecutive rotor stages comprising a plurality of fixed blades each comprising a turbomachine stator blade root, an annular clamping part and an annular abradable support, the root extending radially and being clamped axially between the annular abradable support and the annular clamping piece, and in which a space radially separates a radially inner end of the foot and the annular abradable support.
- the axial direction corresponds to the direction of the axis of rotation A of the turbojet (or of the fan disk), and a radial direction is a direction perpendicular to the axis A.
- the azimuthal direction corresponds to the direction describing a ring around the axial direction.
- the three directions axial, radial and azimuthal correspond respectively to the directions defined by the coast, the radius and the angle in a cylindrical coordinate system.
- the upstream and downstream are defined relative to the normal flow direction of the fluid (upstream to downstream) through the turbojet.
- the upstream and downstream are defined relative to the normal flow direction of the fluid (from upstream to downstream) through the turbomachine.
- the axial direction corresponds to the direction of the axis of rotation A of the fan disk
- a radial direction is a direction perpendicular to the axis A.
- the adjectives interior and exterior are used with reference to a radial direction such that the inner part (ie radially inner) of an element is closer to the axis A than the outer part (ie radially outer) of the same element.
- the foot can expand freely in the radial direction, taking advantage of the space which separates its radially inner end from the annular abradable support. Indeed, this clearance provided by the space allows both the free expansion of the foot, but also the free expansion of the annular abradable support which therefore allows a radial self-adjustment of the expansion of the various elements of the stator stage. . As a result, the seal between the two rotor stages is improved.
- a clamping piece allows simple assembly of the abradable annular support on the foot.
- manufacture of such a clamping piece is also simpler than the manufacture of the fixing means.
- the annular abradable foot support known from the prior art for example FR 3027343.
- the clamping piece is a separate ring from the abradable annular support.
- the stator stage comprises a plurality of sectors, each sector comprising at least one fixed vane extended by a foot.
- the abradable annular support includes an abradable portion which faces at least one wiper carried by the rotor ferrule.
- the seal between the rotor stages is better than when the configuration is the reverse, that is to say when the rotor shell comprises an abradable part and a support carried by the foot comprises a licking.
- the abradable annular support is made of a ceramic matrix composite material.
- This material is lighter than metal, has better heat resistance and also benefits from a lower coefficient of expansion than metal. As a result, the expansion of the abradable ring support is reduced.
- the foot includes a notch configured to cooperate by interlocking with a projection provided in the annular abradable support.
- the abradable annular support comprises at least three projections distributed every 120 ° on the abradable annular support.
- the abradable support is easily centered. Indeed, the entanglement of the annular abradable support in the foot facilitates the positioning of the annular abradable support so that it is concentric with the foot.
- the abradable ring holder includes a threaded portion and the clamping piece is configured to be screwed onto the abradable ring holder.
- the clamping piece and the abradable annular support are assembled around the foot by hooping.
- the clamping piece and the abradable annular support are assembled around the foot by a weld.
- the present disclosure also relates to a turbojet comprising a rotary assembly according to any one of the preceding claims.
- FIG. 1 represents a turbojet comprising a low pressure turbine according to one embodiment.
- Figure 2 shows a sectional view of the low pressure turbine according to the embodiment.
- Figure 3 shows a view centered on the foot of a stator stage of the low pressure turbine in which the clamping piece is omitted.
- FIG. 4 corresponds to the view of FIG. 3 cut at the level of plane IV.
- FIG. 1 shows a sectional view along a vertical plane passing through the main axis A of a turbojet 100 according to the invention.
- the turbojet 100 comprises a fan 2, a low pressure compressor 300, a high pressure compressor 400, a combustion chamber 500, a high pressure turbine 600 and a low pressure turbine 700.
- FIG. 2 shows a sectional view along the same axial plane of a part of the low pressure turbine 700 according to one embodiment of the invention.
- the low pressure turbine 700 includes a plurality of rotor stages.
- FIG. 2 represents two successive rotor stages 20a, 20b surrounding a stator stage 10 from upstream to downstream, the rotor stages 20a and 20b being respectively upstream and downstream of the stator stage 10.
- Each of these rotor stages 20a, 20b and stator 10 comprises a plurality of movable and fixed vanes, respectively.
- Each rotor stage 20a, 20b comprises a respective distributor 21 a, 21 b on which the movable blades are arranged.
- the distributors 21 a, 21 b of two successive rotor stages are interconnected by a ferrule 30 comprising a plurality of wipers 31.
- the stator stage 10 comprises a plurality of sectors, each sector comprising one or more fixed vanes 13 arranged on a foot 11 of stator blading.
- the foot 11 extends in the radial direction, and all of the feet 11 of each sector of the stator stage 10 extends around the axis A of the turbojet 100. In other words, all of the feet 11 extend in a plane perpendicular to the axis A.
- the stator stage 10 also comprises an annular abradable support 40 which extends around the axis A, and extends axially downstream and upstream of the foot 11.
- the annular abradable support 40 comprises an abradable part 41 which is arranged opposite the wipers 31 of the shell 30.
- the wipers 31 are in contact with the annular abradable support 40 which hinders the passage of air at the level of the foot 11 of the stator stage 10.
- the air preferably passes at the level of the blades 13 of the stator stage.
- the abradable part 41 is provided in a material whose structure is honeycomb and which may for example be an aluminum alloy. This abradable part is configured to wear out on contact with the licks 31 when using the turbojet 100.
- the abradable annular support meanwhile, is made of a ceramic matrix composite (CMC) 3D woven by a weaving method known as "contour weaving".
- CMC ceramic matrix composite
- Contour weaving is a known technique for weaving a fibrous texture of axisymmetric shape in which the fibrous structure is woven on a mandrel with the use of warp yarns, the mandrel having an outer profile defined as a function of the profile of the texture. fibrous to achieve.
- the ferrule 30 can also be made of 3D woven CMC. This configuration is also advantageous because it makes it possible to ensure that the ferrule 30 and the annular abradable support 40 expand in the same way.
- the annular abradable support 40 further comprises an arm 42 which extends in the radial direction.
- the arm 42 is located upstream of the foot 11 and extends parallel to the latter.
- the annular abradable support 40 also comprises a first clamping part 42a which extends axially and is located at a radially outer end of the arm 42. This clamping part 42a is in axial contact with the foot 11. In the present example contact with the foot 11 is effected only axially, via the clamping part 42a.
- a clamping piece 50 separate from the annular abradable support 40 is disposed downstream of the foot 11 and comprises a body 52 which extends in the radial direction, parallel to the foot 11 and to the arm 42.
- the clamping piece 50 comprises a base 51 which extends axially and which is disposed at the radially inner end of the body 52.
- the base 51 of the clamping part 50 is in radial contact with the annular abradable support 40, on the downstream side of the foot 11.
- the clamping part 50 further comprises a second clamping part 50a which is disposed at a radially outer end of the body 52.
- the second clamping part 50a is in axial contact with the foot 11 and is disposed opposite the first tightening part 42a.
- the two clamping parts 42a, 50a exert an axial force on the foot 11 in opposite directions, so that the foot 11 is clamped axially between the annular abradable support 40 and the clamping part 50.
- a space 12 radially separates the radially inner end of the foot 11 and the abradable annular support 40. In fact, the contact between the foot 11 and the abradable annular support 40 is only axial. This space 12 is left over the entire circumference of the foot 11 and of the annular abradable support 40.
- the foot 11 can expand radially in the space 12 under the effect of temperature when the turbojet 100 is in operation without applying stress to the annular abradable support 40.
- the foot 11 can also be axially separated from the arm 42 of the annular abradable support 40 and from the body 52 of the clamping part 50.
- the annular abradable support 40 may include a projection 43 oriented axially so as to penetrate axially into a notch 23 formed in the foot 11.
- the clamping piece 50 has been omitted from FIG. 3.
- the notch 23 extends over the entire axial width of the foot 11 and is therefore emerging.
- the projection 43 can be in azimuthal contact with the foot 11 on either side of its azimuthal ends.
- the annular abradable support 40 can comprise a plurality of projections 43, distributed over its entire azimuthal dimension.
- the support The abradable annular 40 can include at least three projections 43 distributed every 120 ° around the abradable annular support 40, which greatly facilitates the centering of the abradable annular support 40 with the foot 11.
- the foot 11 comprises at least three notches 23 corresponding to these three projections 43.
- Figure 4 corresponds to the view of Figure 3 cut at the level of plane IV, which is a plane in the radial and axial directions which intersects the abradable annular support 40 at a projection 43.
- the space 12 radially separating the annular abradable support 40 and the foot 11 is also present at the level of the projection 43. In other words, the space 12 radially separates the radially inner end of the foot 11 and the radially end outside of the projection 43.
- the clamping piece 50 and the annular abradable support 40 are mounted around the foot 11 by hooping. However, in some configurations, the clamp 50 may be welded or screwed onto the abradable annular support 40.
- the abradable annular support 40 comprises a threaded portion configured to allow the screwing of the clamping piece 50.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002695A FR3108358B1 (fr) | 2020-03-19 | 2020-03-19 | Ensemble rotatif pour turbomachine comprenant une pièce annulaire de serrage. |
| PCT/FR2021/050461 WO2021186135A1 (fr) | 2020-03-19 | 2021-03-19 | Ensemble rotatif pour turbomachine comprenant une piece annulaire de serrage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4121637A1 true EP4121637A1 (fr) | 2023-01-25 |
Family
ID=72560651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21716504.2A Pending EP4121637A1 (fr) | 2020-03-19 | 2021-03-19 | Ensemble rotatif pour turbomachine comprenant une piece annulaire de serrage |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11982188B2 (fr) |
| EP (1) | EP4121637A1 (fr) |
| CN (1) | CN115298415B (fr) |
| FR (1) | FR3108358B1 (fr) |
| WO (1) | WO2021186135A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022124401A1 (de) * | 2022-09-22 | 2024-03-28 | MTU Aero Engines AG | Modul für eine strömungsmaschine |
| DE102023117910A1 (de) | 2023-07-06 | 2025-01-09 | MTU Aero Engines AG | Modul für eine strömungsmaschine |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3398931A (en) * | 1966-09-09 | 1968-08-27 | Gen Motors Corp | Glass seal for a turbine |
| US3733146A (en) * | 1971-04-07 | 1973-05-15 | United Aircraft Corp | Gas seal rotatable support structure |
| US4645424A (en) * | 1984-07-23 | 1987-02-24 | United Technologies Corporation | Rotating seal for gas turbine engine |
| FR2620598B1 (fr) | 1987-09-18 | 1991-05-03 | Centre Nat Rech Scient | Perfectionnements apportes aux aliments d'elevage d'animaux, et notamment aux aliments d'elevage d'animaux invertebres, en particulier d'escargots |
| US4869640A (en) * | 1988-09-16 | 1989-09-26 | United Technologies Corporation | Controlled temperature rotating seal |
| FR2722486B1 (fr) | 1994-07-12 | 1996-08-14 | Andre Jean Claude | Conteneur perfectionne |
| DE102012201050B4 (de) | 2012-01-25 | 2017-11-30 | MTU Aero Engines AG | Dichtungsanordnung, Verfahren sowie Strömungsmaschine |
| FR2988787B1 (fr) | 2012-04-03 | 2016-01-22 | Snecma | Redresseur a calage variable pour compresseur de turbomachine comprenant deux anneaux internes |
| EP2722486B1 (fr) * | 2012-10-17 | 2016-12-07 | MTU Aero Engines AG | Support de joint d'étanchéité pour ensemble statorique |
| FR3027343B1 (fr) | 2014-10-15 | 2019-08-09 | Safran Aircraft Engines | Ensemble rotatif pour turbomachine comprenant un anneau de stator auto-porte |
| PL3409897T3 (pl) * | 2017-05-29 | 2020-04-30 | MTU Aero Engines AG | Uszczelka maszyny przepływowej, sposób wytwarzania uszczelki oraz maszyna przepływowa |
| DE102017209682A1 (de) * | 2017-06-08 | 2018-12-13 | MTU Aero Engines AG | Axial geteilter Turbomaschinen-Innenring |
-
2020
- 2020-03-19 FR FR2002695A patent/FR3108358B1/fr active Active
-
2021
- 2021-03-19 WO PCT/FR2021/050461 patent/WO2021186135A1/fr not_active Ceased
- 2021-03-19 US US17/906,248 patent/US11982188B2/en active Active
- 2021-03-19 EP EP21716504.2A patent/EP4121637A1/fr active Pending
- 2021-03-19 CN CN202180020849.3A patent/CN115298415B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115298415B (zh) | 2025-10-28 |
| FR3108358B1 (fr) | 2024-03-22 |
| WO2021186135A1 (fr) | 2021-09-23 |
| FR3108358A1 (fr) | 2021-09-24 |
| US20230125862A1 (en) | 2023-04-27 |
| US11982188B2 (en) | 2024-05-14 |
| CN115298415A (zh) | 2022-11-04 |
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