EP4127416A1 - Bagues de paliers souple et raide fusionnees - Google Patents
Bagues de paliers souple et raide fusionneesInfo
- Publication number
- EP4127416A1 EP4127416A1 EP21720804.0A EP21720804A EP4127416A1 EP 4127416 A1 EP4127416 A1 EP 4127416A1 EP 21720804 A EP21720804 A EP 21720804A EP 4127416 A1 EP4127416 A1 EP 4127416A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- upstream
- enclosure
- downstream
- outer ring
- bearing
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
- F01D25/164—Flexible supports; Vibration damping means associated with the bearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/026—Multi-stage pumps with a plurality of shafts rotating at different speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/059—Roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
- F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
-
- 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
- F05D2240/50—Bearings
- F05D2240/54—Radial bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
- F16C27/045—Ball or roller bearings, e.g. with resilient rolling bodies with a fluid film, e.g. squeeze film damping
-
- 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
- the present invention relates to the field of turbomachine bearing enclosures, in particular the outer rings of engine shaft bearings.
- the invention falls within the general field of aircraft turbomachines.
- a double-flow turbomachine 10 of an aircraft comprises a fan 12 optionally connected to a reduction gear 14 itself connected to a drive shaft 16 extending along an axis of rotation X
- This drive shaft 16 in particular rotates a low pressure turbine 20.
- the low pressure turbine 20 is located downstream of a high pressure turbine 18, it is said to be at the rear of the turbomachine 10.
- the low turbine pressure 20 is conventionally rotated by the motor shaft 16 by means of rolling bearings 22, 24. These rolling bearings 22, 24 are located within an enclosure 26 called the rear enclosure of the turbomachine. This rear enclosure 26 is shown in FIG. 1 of the present application.
- This rear enclosure 26 conventionally has an axial length of the order of 400 mm.
- the rear enclosure 26 comprises two rolling bearings 22, 24, an upstream bearing 22 and a downstream bearing 24, each bearing 22, 24 comprising an internal ring 28a, 28b and a ring external 29a, 29b.
- the inner rings 28a, 28b are carried by the drive shaft 16 of the turbomachine 10.
- the upstream outer ring 29a is conventionally connected via a support ring 30 of a fluid damping film (known by the English term of squeeze). film) centered upstream to a first bearing support 32a (upstream bearing support) and the downstream outer ring 29b is connected via a support ring 30 of damping fluid film centered downstream to a second bearing support 32b (downstream bearing support), as can be seen in FIG. 2.
- the first bearing support 32a comprises a first upstream flange 100a intended to cooperate in fixing with a first downstream flange 100b of the second bearing support 32b. This cooperation is carried out with conventional fixing means F known to anyone skilled in the art.
- the first bearing support 32a comprises a second flange (not shown) intended to cooperate in fixing with a first flange 26a (upstream flange) of the enclosure 26 and a flange S of a fixed structure of the turbomachine 10 (see FIG. 1 ).
- the first bearing support 32a finally comprises a third flange 101 intended to cooperate in fixing with a flange 33 of the outer ring 29a.
- the second bearing support 32b for its part comprises a second support flange 102 intended to cooperate in fixing, by the fixing means F, with a second flange 26b (downstream flange) of the enclosure 26.
- the device depending on the state of the technique therefore has a total of nine flanges S, 33, 100a, 100b, 101, 102, 26a, 26b (and the flange not shown) making it possible to connect the upstream and downstream bearing supports 32a, 32b to the fixed structure of the turbomachine 10.
- the principle of a flexible bearing on a centered damping fluid film is to give the bearing radial damping, flexibility via the column section and centering generally associated with a flange for its axial locking.
- the radial damping of the bearing by a fluid damping film per se will not be explained in the present application because this technique is known to anyone skilled in the art.
- the dynamicists can in particular individually adjust the flexibility of each level by calculating the size of the column sections by adjusting both their size and their length.
- the drawback of this rear enclosure 26 as it exists in the state of the art is its axial size.
- the axial dimension of the rear enclosure 26 is mainly due to the constraints imposed by the overall dynamics. Indeed, the bearings 22, 24 are integrated into the enclosure 26 with flexibility (flexibility provided by a section of columns 34, see Figure 2) which requires an incompressible axial length for each bearing 22,24. Furthermore, again for reasons of overall dynamics, these bearings 22, 24 have a minimum distance to be observed between them.
- the object of the present invention is in particular to provide an enclosure having a reduced axial size without weakening the overall dynamics, that is to say without impacting the flexibility (therefore the length of the columns) and without impacting the distance between the two. bearings.
- a turbomachine enclosure comprising a turbomachine engine shaft rotating about a longitudinal axis X by means of two rolling bearings, an upstream bearing and a downstream bearing each comprising an internal ring carried by the motor shaft.
- the two bearings share a single one-piece outer ring, said single one-piece outer ring comprising an upstream end and a downstream end, the upstream end and the downstream end being connected to each other by a section. of columns, the single one-piece outer ring being further carried by an upstream sole and a downstream sole of a bearing support which is able to be fixed to a fixed structure of the turbomachine
- this solution makes it possible to achieve the above-mentioned objective.
- This makes it possible, on the one hand, to reduce the number of parts of the enclosure.
- this has an impact on the production of rolling bearing supports because this outer ring allows the elimination of two out of three flanges.
- This minimizes the thickness and length of the enclosure while obtaining a saving in time, cost and simplification of assembly by reducing the number of parts. And all this, while retaining the functions linked to the bearings.
- the reduction in the number of flanges also gives more stiffness to the assembly.
- the enclosure according to the invention can comprise one or more of the following characteristics, taken in isolation from one another or in combination with one another:
- the upstream end of the single one-piece outer ring has a radially outer surface shrunk onto a radially inner surface of the upstream sole
- the upstream end of the single one-piece outer ring cooperates with the upstream flange of the bearing support, so as to ensure a centering function of the single outer ring
- the single one-piece outer ring is axially blocked by a stop ring or by bolting the upstream end of the single one-piece outer ring with the upstream flange of the bearing support,
- a support ring for a fluid damping film is disposed radially between the downstream end of the single one-piece outer ring and the downstream bearing support flange, the support ring and the downstream end forming a chamber intended for receive the damping fluid
- the distance dP separating the upstream bearing from a downstream end of the enclosure is between 250 and 300 mm
- the bearing support has an upstream wall carrying the upstream sole and a downstream wall carrying the downstream sole, the upstream and downstream wall being connected to a wall of the enclosure by an external flange cooperating with a first flange of the wall of the 'pregnant,
- downstream end of the single one-piece outer ring is retained axially, downstream, by a retaining plate, and upstream by an upstream retention arranged on the downstream sole,
- the enclosure is formed at least in part by an exhaust housing
- the upstream level is a so-called steep level
- the downstream bearing is a so-called flexible bearing.
- the invention also relates to an aircraft turbomachine comprising at least one enclosure according to the invention.
- Figure 1 is a longitudinal schematic section of an aircraft turbomachine to which the invention applies,
- Figure 2 is a schematic longitudinal section of a turbomachine rear enclosure according to the state of the art
- FIG. 3 is a longitudinal schematic section of a turbomachine enclosure according to a first embodiment of the invention
- FIG. 4a is an enlargement of the upstream bearing according to the previous figure
- FIG. 4b is an enlargement of the downstream bearing according to FIG. 3
- FIG. 5 is a longitudinal schematic section of a turbomachine enclosure according to a second embodiment of the invention
- Figure 6 is a perspective view of a stop ring according to the second embodiment of the invention.
- the enclosure 26 does indeed include the motor shaft 16 in rotation around the longitudinal axis X.
- This motor shaft 16 can be a low pressure shaft of the turbomachine 10.
- the two bearings at bearing 22, 24, (the upstream bearing 22 and the downstream bearing 24) are connected to the motor shaft 16.
- the enclosure considered in FIG. 3 is the rear enclosure of the turbomachine 10, more particularly an exhaust casing of this turbomachine 10.
- the two rolling bearings 22, 24 of the enclosure 26 share a single one-piece outer ring 35 (from matter). Indeed, the outer rings 29a, 29b of Figure 2 have been merged.
- the single outer ring 35 has a generally cylindrical shape and extends along the X axis.
- the single outer ring 35 comprises an upstream end 36a and a downstream end 36b connected to the center of the single outer ring 35 by a section of columns 34.
- the single outer ring 35 is carried, at its ends 36a, 36b, by two respectively upstream and downstream bearing support flanges 38a, 38b, each fixed to the fixed structure of the turbomachine 10. It is therefore observed, whatever the mode of operation. embodiment, a reduction in the number of flanges of the bearing supports: in fact the present invention makes it possible to eliminate one or two flanges, which leads to a simplification of the manufacture of the bearing supports 22, 24 and to a simplification of the assembly of the the entire enclosure 26.
- the supports for the bearings 22, 24 can be obtained directly by foundry or by additive manufacturing.
- the elimination of various prior art flanges / pairs of flanges also brings greater stiffness to the supports of the bearings 22, 24 because in a mechanical element, a pair of flanges provides flexibility.
- the upstream end 36a cooperates, via a bearing, with the inner ring 28a of the upstream bearing 22.
- the inner ring 28a is, as before, carried by the motor shaft 16.
- the upstream end 36a of the single outer ring 35 is connected to an upstream end of a main bearing support 40 forming a base 38a for an upstream bearing support and the downstream end 36b of the single outer ring 35 cooperates, via a bearing, with the inner ring 28b of the downstream bearing 24.
- the downstream inner ring 28b is, as before, carried by the motor shaft 16.
- the downstream end 36b of the single outer ring 35 is connected to a downstream end of the main bearing support 40 forming the downstream bearing support base 38b.
- the two soles 38a, 38b are thus connected to a wall of the enclosure 26 by the main bearing support 40, unique in this embodiment.
- the prior art flanges 100a, 100b no longer exist.
- the main bearing bracket 40 now has only two mounting brackets:
- the bearing support 40 has an upstream wall 40a carrying the upstream flange 38a and a downstream wall 40b carrying the downstream flange 38b.
- the upstream 40a and downstream 40b walls are connected to the wall of the enclosure 26 by the external flange cooperating with the first flange 26a of the wall of the enclosure 26.
- the upstream 40a and downstream 40b walls form a single piece with the support. bearing 40.
- the upstream wall 40a is distant from the downstream wall 40b.
- the merger of the two outer rings into a single outer ring 35 indeed makes it possible to reduce the axial bulk of the enclosure 26.
- the axial distance dP taken along the X axis (in considering the central axis of the bearing) separating the upstream bearing 22 from the downstream end of the enclosure 26 (defined by a radial wall 43) passes by a length of around 400 mm at a length of between 250 and 300 mm (see Figure 3).
- upstream bearing 22 is a stiff bearing and the downstream bearing 24 is a flexible bearing.
- the overall dynamics are improved by the fact that the upstream bearing is now "stiff" (instead of flexible in the prior art), which also helps to simplify assembly.
- the downstream bearing 24 is a bearing on a support ring 30 of fluid damping film centered by means of the section of central columns 34, which makes it possible to adjust the position of the downstream bearing 24 relative to the upstream bearing 22 of which the position is fixed by clamping to the upstream bearing support sole 38a.
- the fluid damping film support ring 30 is disposed radially between the downstream end 36b of the single outer ring and the downstream bearing support flange 38b. There is thus a flexible downstream bearing 24.
- the support ring 30 and the downstream end 36b form a chamber for receiving the damping fluid. More specifically, the downstream end 36b of the single outer ring 35 comprises two annular grooves g respectively receiving a seal making it possible to axially delimit the chamber.
- the damping fluid is, for example, an oil.
- the centering of the single outer ring 35 is achieved by the cooperation between the upstream end 36a and the upstream bearing support flange 38a.
- the upstream end 36a of the single outer ring 35 is bolted, by means of a bolt B, to the upstream bearing support flange 38a.
- the upstream end 36a of the single outer ring 35 is provided with a flange C.
- This centering flange C extends radially from the outer surface of the 'upstream end 36a, towards the outside of the turbomachine 10. This centering flange C is held in tightening cooperation with the upstream bearing support flange 38a by means of the bolt B.
- the upstream bearing 22 is therefore fixed to the support of main bearing 40 and therefore to the static structure of the turbomachine 10.
- the downstream bearing 24, for its part, remains flexible to meet the need for overall dynamics. The required flexibility is achieved by the section of columns 34 and the support ring 30 of fluid damping film of the downstream bearing 24.
- downstream end 36b of the single outer ring 35 downstream is retained axially, downstream, by a retaining plate 42, and upstream by an upstream retention 44 disposed on the downstream flange. 38b (see figure 4b).
- the retaining plate 42 bears on the downstream bearing support sole 38b.
- the retaining plate 42 comprises an orifice for passing a bolt B making it possible to secure the retaining plate 42 with the bearing support sole 38b 40.
- the retaining plate 42 extends radially to the downstream end 36b. of the single outer ring 35 forming an axial stop.
- the upstream retention 44 is for example formed by an appendage of the downstream sole 38b. The appendage extends upstream of the downstream flange 38b.
- the downstream end 36b of the single outer ring 35 has an outer groove 46 forming a mortise intended to cooperate, by recessing with the retaining plate 42 forming a tenon.
- the single outer ring 35 is held axially in place by the outer groove 46.
- a rotation stop (not shown) can optionally be integrated into one or the other of the modes of operation. production.
- the upstream end 36a of the single outer ring 35 is retained axially against the upstream sole 38a by a stop ring 48.
- the main bearing support 40 is fitted into the flange C of the single outer ring 35.
- the upstream flange 38a comprises a groove receiving the flange C.
- the stop ring 48 ensures the axial locking of the single outer ring 35.
- the stop ring 48 is a ring Spirolox ⁇ type capable of supporting high axial loads.
- the stop ring 48 can have a spiral shape and include, as illustrated in Figure 6, two superimposed layers of a wound metal strip. This double winding makes it possible to increase the resistance of the stop ring 48 with respect to axial loads.
- the stop ring 48 is formed in particular of carbon steel.
- the stop ring 48 has a thickness e measured along the axis of the stop ring 48 of between 2.5 mm and 4.5 mm and preferably between 3.5 mm and 4 mm.
- the stop ring 48 is for example housed in a groove made in the upstream sole 38a.
- the stop ring 48 bears on the flange C of the single outer ring 35.
- the groove preferably has a width greater than the thickness of the stop ring 48.
- Such a thickness of the ring d ' stop 48 gives it a high axial load compared to the rings of the prior art.
- the stop ring 48 preferably has an outer diameter D of between 150 mm and 190 mm.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rolling Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2003072A FR3108689B1 (fr) | 2020-03-27 | 2020-03-27 | Bagues de paliers souple et raide fusionnées |
| PCT/FR2021/050535 WO2021191571A1 (fr) | 2020-03-27 | 2021-03-26 | Bagues de paliers souple et raide fusionnees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4127416A1 true EP4127416A1 (fr) | 2023-02-08 |
Family
ID=70804802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21720804.0A Pending EP4127416A1 (fr) | 2020-03-27 | 2021-03-26 | Bagues de paliers souple et raide fusionnees |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12025182B2 (fr) |
| EP (1) | EP4127416A1 (fr) |
| CN (1) | CN115335589B (fr) |
| FR (1) | FR3108689B1 (fr) |
| WO (1) | WO2021191571A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20260098483A1 (en) * | 2024-10-08 | 2026-04-09 | Pratt & Whitney Canada Corp. | Bearing assembly housing for an aircraft propulsion system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135740B (en) * | 1983-02-11 | 1986-02-12 | Rolls Royce | Gas turbine engine lubrication systems |
| RU1646354C (ru) * | 1989-04-03 | 1995-06-27 | Запорожское машиностроительное конструкторское бюро "Прогресс" | Подшипниковая опора |
| US7581889B2 (en) * | 2006-09-08 | 2009-09-01 | Pratt & Whitney Canada Corp. | Integral tandem bearing for high speed flexible shafts |
| FR2962176B1 (fr) * | 2010-07-01 | 2012-07-13 | Turbomeca | Procede d'amortissement dynamique d'un arbre de puissance en particulier d'un arbre surcritique, et architecture d'amortissement de mise en oeuvre |
| US9933012B1 (en) * | 2015-02-09 | 2018-04-03 | United Technologies Corporation | Bearing centering spring with integral outer rings |
| CA3000360C (fr) * | 2017-04-14 | 2020-05-26 | General Electric Company | Assemblage de support dote d'un element de renfort variable |
| US10844746B2 (en) * | 2019-03-29 | 2020-11-24 | Pratt & Whitney Canada Corp. | Bearing housing |
-
2020
- 2020-03-27 FR FR2003072A patent/FR3108689B1/fr active Active
-
2021
- 2021-03-26 WO PCT/FR2021/050535 patent/WO2021191571A1/fr not_active Ceased
- 2021-03-26 CN CN202180024519.1A patent/CN115335589B/zh active Active
- 2021-03-26 US US17/906,930 patent/US12025182B2/en active Active
- 2021-03-26 EP EP21720804.0A patent/EP4127416A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3108689A1 (fr) | 2021-10-01 |
| US20230117756A1 (en) | 2023-04-20 |
| US12025182B2 (en) | 2024-07-02 |
| WO2021191571A1 (fr) | 2021-09-30 |
| FR3108689B1 (fr) | 2022-02-25 |
| CN115335589B (zh) | 2025-09-02 |
| CN115335589A (zh) | 2022-11-11 |
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