EP4547947A1 - Turbomachine comportant un dispositif de recuperation d'huile ameliore - Google Patents
Turbomachine comportant un dispositif de recuperation d'huile amelioreInfo
- Publication number
- EP4547947A1 EP4547947A1 EP23755121.3A EP23755121A EP4547947A1 EP 4547947 A1 EP4547947 A1 EP 4547947A1 EP 23755121 A EP23755121 A EP 23755121A EP 4547947 A1 EP4547947 A1 EP 4547947A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turbomachine
- oil
- outer shell
- section
- tubular
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- 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
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
-
- 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
-
- 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
- F05D2240/56—Brush seals
-
- 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
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/12—Two-dimensional rectangular
-
- 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
- F05D2250/00—Geometry
- F05D2250/20—Three-dimensional
- F05D2250/29—Three-dimensional machined; miscellaneous
- F05D2250/294—Three-dimensional machined; miscellaneous grooved
-
- 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
- F05D2260/98—Lubrication
Definitions
- TITLE TURBOMACHINE COMPRISING AN IMPROVED OIL RECOVERY DEVICE
- the invention relates to a turbomachine equipped with an oil recovery device with improved efficiency.
- the lubrication enclosure is connected to an oil circuit comprising an oil inlet conduit, through which the oil is pumped into the enclosure. It includes an oil recovery device comprising an oil return conduit, through which the oil returns to the oil circuit in order to be pumped again.
- the bearing support in fact comprises an outer shell which is rotatably mounted inside an inner shell of the inter-turbine casing, and these two shells define the interface zone.
- This interface area can receive a system for dispelling the oil comprising at least one twist and lunule device.
- This system can be supplemented by a dynamic sealing system, comprising a rear labyrinth seal and/or a brush seal.
- the pressurized enclosure further comprises an oil drainage device comprising a drainage conduit communicating with the exterior of the turbomachine.
- the oil must be guided from the bearing to a wall of the inter-turbine casing which communicates with an inlet of a return conduit of oil. To do this, the oil must bypass the interface zone without penetrating it.
- the oil recovery device comprises a tubular tab, commonly called a “drip lance", which extends the tubular wall supporting the bearing and which extends inside one end of the outer shell of the support of landing.
- This tongue is intended to guide the bearing during its assembly to allow precise installation of the low pressure shaft in order to avoid any contact between the shaft and the inter-turbine casing.
- This tongue is also configured to lead oil to be projected successively from the tongue to the outer shell of the bearing support, then from the outer shell of the bearing support to the wall of the interturbine casing leading to the inlet of the duct. oil return.
- the outer shell of the bearing support is extended by a tubular extension which extends axially around the tubular tongue beyond one end of the inner shell of the housing inter-turbines, and in which is formed an annular outer groove of circular section and concavity facing opposite the tubular tongue.
- This groove is supposed to prevent the spread of oil along the tubular extension then up to the outer shell of the bearing support in the interface zone. In operation, this configuration in principle allows the oil to bypass the interface zone without penetrating it.
- the interface zone is no longer subject to the pressurization pressure of the second enclosure, and the turbomachine is tilted backwards by a few degrees more than during normal operation. It has been observed that the oil tends to flow by gravity along the drip-throwing tab, to bypass the end of the tubular extension then to insinuate itself by capillary action into the annular groove of circular section and to cross the area interface, in particular by capillary action crossing the interface zone, to finally penetrate into the second enclosure. Under certain conditions, oil can then be evacuated from this second enclosure by the oil drainage device and flow onto the tarmac on which the aircraft is parked. Oil can even reach a hotter enclosure of the turbomachine and cause the release of smoke which would be detrimental to the perception that users might have of the quality of the turbomachine.
- the present invention relates to a turbomachine equipped with an oil recovery device which remedies the aforementioned drawback.
- the invention proposes a turbomachine comprising first and second internal members movable in rotation relative to each other around an axis X, and at least one guide bearing mounted between first and second respective tubular walls of axis X of the first and second members, the first member further comprising a third wall substantially transverse to the axis said third wall, said third and fourth walls separating two enclosures, respectively a first enclosure for lubricating the bearing, and a second enclosure, the fourth wall being bordered by an outer shell of the second member and the third wall being bordered by an inner shell of the first member, the inner shell surrounding the outer shell and said inner and outer shells delimiting an interface zone between said enclosures, said turbomachine further comprising an oil recovery device comprising a tubular tongue which extends the first tubular wall of the first member and which extends axially inside one end of the outer shell of the second member, this tongue being configured to lead oil to be projected successively from the tongue to the outer shell of the second member, then from the outer shell of the second member
- the tubular extension advantageously allows the oil flowing from the tubular tongue to be deported at a substantial axial distance from the interface zone and the rectangular shape of the groove of this extension prevents the oil from forming a capillary bridge and does not reach the interface zone.
- the tubular extension successively comprises, starting from the outer shell of the second member:
- the characteristics of the lubricating oil include an operating temperature below 120°C, a viscosity of between 20 and 30 centistokes at 40°C and 4.9 to 5 centistokes at 100°C with a density of between 0.9 and 1.05 Kg/L,
- the third section has an axial thickness greater than or equal to 1.2 mm
- the first member is an inter-turbine casing
- the second member is a bearing support secured to a low-pressure shaft
- the first lubrication enclosure of the bearing communicates with an oil recovery conduit connected to a circuit oil from the turbomachine
- the second enclosure is a pressurized enclosure communicating with an oil drainage conduit connected to the outside of the turbomachine
- the interface zone is a reception zone of a system for dispelling oil comprising a front auger and front lunulae and a rear auger and rear lunulae interposed between the inner and outer shrouds,
- the interface zone receives behind said system for dispelling the oil a dynamic sealing system comprising at least one dynamic seal.
- Figure 1 is an axial sectional view of a rear part of a turbomachine according to the state of the art
- Figure 2 is an axial sectional view of an extension of an outer shell of a bearing support of the turbomachine of Figure 1,
- Figure 3 is a sectional view of the rear part of the turbomachine according to the state of the art illustrating the path of the lubricating oil
- Figure 4 is an axial sectional view of an extension of an outer shell of a bearing support of a turbomachine according to the invention
- Figure 5 is a sectional view of the rear part of the turbomachine according to the invention illustrating the path of the lubricating oil
- Figure 6 is a perspective view of the end of the outer shell of the bearing support and its extension.
- turbomachine 10 comprises respective first and second internal members 14, 16 movable in rotation relative to each other around an axis X and at least one guide bearing 20 mounted between the first and second members .
- the invention focuses particularly on the case of an inter-turbine casing 14 internally receiving in rotation a low-pressure shaft 15 via a bearing support 16 secured to this low-pressure shaft 15.
- the low-pressure shaft pressure also includes a rear end carrying a journal 19 of a low pressure turbine 18.
- a segmented radial seal 22 is also mounted between the interturbine casing 14 and the low pressure shaft 15.
- the inter-turbine casing 14, which here forms the first member, is a substantially annular casing which is crossed by a primary gas stream 24 of the turbomachine.
- Turbine disks 26, integral with the low pressure turbine journal 16 are also placed in the gas stream 24 and their blades 28 are arranged alternating with rectifier blades 30.
- the inter-turbine casing 14 comprises a first tubular wall 32 of axis X and the bearing support 16 comprises a second tubular wall 33, the bearing 20 being mounted between these walls 32, 33.
- the inter-turbine casing 14 further comprises a third wall 36, substantially transverse to the axis
- the bearing support 16 which here forms the second member, comprises a fourth wall 34, substantially transverse to the axis inside the third wall 36, which itself is fixed.
- the inter-turbine casing 14, the low pressure shaft 15 and the bearing support 16 define a first enclosure 38 for lubricating the bearing comprising lubricating oil inside the rear part 12 of the turbomachine 10.
- these fourth and third walls 34, 36 separate the first bearing lubrication enclosure 38 from a second enclosure 40, external to the first enclosure 38.
- the fourth wall 34 is bordered by an outer shell 42, therefore also forming part of the bearing support 16, and the third wall 36 is bordered by an inner shell 44, therefore forming part of the inter-turbine casing 14.
- the two ferrules 42, 44 are arranged facing each other, the inner ferrule 44 surrounding the outer ferrule 42. As a result, the two outer 42 and inner 44 ferrules delimit an interface zone 46 between the two speakers 38, 40.
- the second enclosure 40 is a pressurized enclosure supplied with pressurized air taken by a tap made on one of the compressors of the turbomachine.
- This enclosure 40 is pressurized so as to exert a positive pressure on the interface zone 46 in which can be housed, in a non-limiting manner of the invention, a system for dispelling the oil comprising at least one tendril and lunules, which can be completed in or outside the interface zone 46 by a dynamic sealing system such as a labyrinth or brush seal ensuring sealing between the lubrication enclosure 38 and the second enclosure 40.
- the interface zone 46 only comprises a system for removing the oil.
- the lubricating oil is pumped under pressure into the lubrication enclosure 38 via an oil inlet conduit 48 and it is recovered by an oil recovery device which allows the oil to be evacuated from the enclosure lubrication through a conduit 50, so that it is recovered then pumped again inside this enclosure 38.
- an oil recovery device which allows the oil to be evacuated from the enclosure lubrication through a conduit 50, so that it is recovered then pumped again inside this enclosure 38.
- the lubricating oil coming from the bearing 20 must first reach an internal face 52 of the third wall 36 of the inter-turbine casing 14 from where it is conveyed to the inlet of the conduit 50.
- the oil recovery device also comprises a tubular tongue 54 which extends the first tubular wall 32 of the inter-turbine casing 14 and which extends axially towards the outer shell 42 of the bearing support 16, and more particularly inside one end 43 thereof.
- This tongue 54 is intended to guide the bearing 20 during its assembly to allow precise installation of the low pressure shaft
- the end 43 of the inner shell 42 of the bearing support 16 is extended by a tubular extension 56 which extends axially and partially around the tubular tongue 54.
- This extension 56 extends beyond one end 58 of the inner shell 44 of the inter-turbine casing 14, and is therefore not arranged in the interface zone 46, but is placed outside it.
- an external groove 60 is formed, the concavity of which faces opposite the tubular tongue 54.
- extension 56 of this type conforming to the state of the art has been shown in Figure 2.
- the extension 56 has substantially the same internal and external diameters as the external ferrule 42 of the bearing support 16 and its groove 60 has a determined width L and depth P.
- the groove 60 has a circular section.
- the interface zone 46 When the interface zone 46 is equipped with a system for dispelling the oil such as a double system comprising a front spinner 67 and front lunules 69 and a rear spinner 68 and rear lunules 68, the oil can pass through this system then penetrate into the second enclosure 40 from where it can be evacuated via the drainage conduit 41.
- a system for dispelling the oil such as a double system comprising a front spinner 67 and front lunules 69 and a rear spinner 68 and rear lunules 68
- the extension 56 extends firstly beyond half an axial length I of the tubular tongue 54.
- the extension 56 surrounds the exterior of the tubular tongue 54 axially beyond half an axial length I of the tubular tongue 54. It has an equal internal diameter has an internal diameter of the outer shell 42 of the second member 16 and an external diameter less than or equal to an external diameter of the outer shell, and its annular groove 60 is of rectangular section.
- the free end of the extension 56 thus forms a return which, combined with the rectangular shape of the section of the outer annular groove 60, prevents the oil from forming a bridge by capillarity through this annular groove 60 to join the interface zone 46.
- a groove of rectangular section makes it possible to break the continuity of the oil film and prevent its propagation through the annular groove 60.
- the tubular extension 56 successively comprises, from the outer shell 42 of the support 16, a first section 72, a second section 74 and a third section 76.
- the first section 72 extends the outer shell 42 of the support 16, and has the same interior diameters d?2 and exterior diameters D72 as the interior diameters d42 and exterior D42 of the exterior shell 42 in the interface zone 46.
- the tubular extension comprises a second section 74, joined to the first section 72.
- the second section 74 has an internal diameter d?4 equal to the internal diameter d42 of the outer shell 42 in the interface zone 46, and d 'an outer diameter D74 less than the outer diameter D42 of the outer shell 42 in the interface zone 46.
- the third section 76 joined to the second section 74, has an internal diameter d?4 equal to the internal diameter d42 of the outer shell 42, and an external diameter D?6 determined equal to the external diameter D42 of the outer shell 42.
- second and third sections 74, 76 thus form a recess which extends axially outside the tubular tongue 54 beyond the half-axial length I of this tubular tongue 54.
- the axial dimensions first to third sections 72, 74, 76 therefore determine the coverage of the tubular extension 56 around the tubular tongue 54 beyond the axial half-length I.
- annular groove 60 of rectangular section is delimited by an external wall 74a of axis section 74.
- the dimensions of the groove 60 are decisive with regard to its ability to oppose the formation of a lubricant bridge through it.
- the characteristics of the lubricating oil used for the lubrication of the bearing 20 include an operating temperature of less than 120°C, a viscosity of between 20 and 30 centistokes at 40°C and 4, 9 to 5 centistokes at 100°C with a density between 0.9 and 1.05 Kg/L.
- the radius of curvature of the sections 72 to 76 Another important parameter of the groove 60 is the radius of curvature of the sections 72 to 76. To break the oil film, it is necessary that the radius of curvature allowing the connection of these sections is as small as possible in order to provide a groove 60 with a section as close as possible to a perfect rectangle.
- the first and second sections 72, 74 on the one hand, and the second and third sections 74, 76 on the other hand are connected at the bottom of the groove by a radius of curvature R less than or equal to 0.6 mm.
- the third section 76 has a minimum thickness E?6, in order to prevent the oil from passing through its free end 78.
- the third section 76 has a thickness E?6 which is greater than 1.2 mm.
- the extension 56 can be arranged radially relative to the tubular tongue 54 with reduced clearance, a reduced clearance making it possible to limit the speed of the flow of the oil.
- the invention advantageously makes it possible to avoid, for a determined angle of inclination of the turbomachine which can go up to 4°, that, when stopped, the oil does not cross the interface zone 46, whether it is intended to receive a system for dispelling oil such as the tendrils 67, 68 and lunules 69, 70 or another system. It therefore makes it possible to prevent oil from spreading on the tarmac via the drainage conduit 41 or from infiltrating into other hotter enclosures of the turbomachine such as an enclosure 80, with the risks of release of smoke that this would imply, which would be detrimental to the perception that users might have of the quality of the turbomachine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2206596A FR3137407B1 (fr) | 2022-06-30 | 2022-06-30 | Turbomachine comportant un dispositif de recuperation d’huile ameliore |
| PCT/FR2023/050992 WO2024003507A1 (fr) | 2022-06-30 | 2023-06-28 | Turbomachine comportant un dispositif de recuperation d'huile ameliore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4547947A1 true EP4547947A1 (fr) | 2025-05-07 |
Family
ID=83438694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23755121.3A Pending EP4547947A1 (fr) | 2022-06-30 | 2023-06-28 | Turbomachine comportant un dispositif de recuperation d'huile ameliore |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250389208A1 (fr) |
| EP (1) | EP4547947A1 (fr) |
| CN (1) | CN119452152A (fr) |
| FR (1) | FR3137407B1 (fr) |
| WO (1) | WO2024003507A1 (fr) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201426A (en) * | 1978-04-27 | 1980-05-06 | General Electric Company | Bearing clamping assembly for a gas turbine engine |
| FR2783579B1 (fr) * | 1998-09-17 | 2000-11-03 | Snecma | Agencement de retenue d'un palier, notamment pour un arbre de compresseur a haute pression |
| FR2857708B1 (fr) * | 2003-07-15 | 2005-09-23 | Snecma Moteurs | Dispositif perfectionne de fixation d'un arbre de moteur sur un support de palier |
| US8245818B2 (en) * | 2007-10-23 | 2012-08-21 | Pratt & Whitney Canada Corp. | Gas turbine oil scavenging system |
| FR2927366B1 (fr) * | 2008-02-13 | 2013-07-05 | Snecma | Dispositif de recuperation d'huile. |
| FR2932221B1 (fr) * | 2008-06-04 | 2011-10-14 | Snecma | Tourillon support de palier et ensemble d'un tel tourillon et d'un fourreau d'etancheite |
| FR2990242B1 (fr) * | 2012-05-02 | 2014-06-13 | Snecma | Procede de demontage d'un turboreacteur |
| FR3007069B1 (fr) * | 2013-06-12 | 2015-07-17 | Snecma | Tourillon pour turbine haute pression, et turboreacteur incluant un tel tourillon |
| WO2015017040A2 (fr) * | 2013-07-30 | 2015-02-05 | United Technologies Corporation | Agencement de bague d'aube de turbine à gaz |
| DE112016001408T5 (de) * | 2015-03-26 | 2017-12-07 | Borgwarner Inc. | Ölabweiser mit Ölführung |
| FR3071547B1 (fr) * | 2017-09-27 | 2019-09-13 | Safran Aircraft Engines | Ensemble d'un support palier et des paliers d'un arbre de rotor dans une turbomachine |
| FR3075866B1 (fr) * | 2017-12-22 | 2019-12-27 | Safran Aircraft Engines | Tube de degazage pour une turbomachine d'aeronef a reducteur |
| FR3075860B1 (fr) * | 2017-12-22 | 2019-11-29 | Safran Aircraft Engines | Etancheite dynamique entre deux rotors d'une turbomachine d'aeronef |
| FR3081513B1 (fr) * | 2018-05-28 | 2021-06-18 | Safran Aircraft Engines | Systeme de transmission de puissance comprenant un dispositif de recuperation d'huile de lubrification et turbomachine equipee d'un tel systeme de transmission de puissance |
| GB201808855D0 (en) * | 2018-05-31 | 2018-07-18 | Rolls Royce Plc | Oil recovery system |
| FR3087226B1 (fr) * | 2018-10-10 | 2020-10-23 | Safran Aircraft Engines | Turbomachine d'aeronef a reducteur mecanique et a turbine contrarotative |
| FR3088978B1 (fr) * | 2018-11-23 | 2020-12-18 | Safran Trans Systems | Deflecteur pour un reducteur mecanique de turbomachine d’aeronef |
| US10781718B1 (en) * | 2019-03-19 | 2020-09-22 | United Technologies Corporation | Seal plate lubricant slinger |
| US11286990B2 (en) * | 2019-04-03 | 2022-03-29 | Raytheon Technologies Corporation | Seal runner with deflector and catcher for gas turbine engine |
| US11499447B2 (en) * | 2020-01-15 | 2022-11-15 | Pratt & Whitney Canada Corp. | Bearing support with frangible tabs |
| US11268442B2 (en) * | 2020-07-01 | 2022-03-08 | Raytheon Technologies Corporation | Mid mount sleeve arrangement |
-
2022
- 2022-06-30 FR FR2206596A patent/FR3137407B1/fr active Active
-
2023
- 2023-06-28 WO PCT/FR2023/050992 patent/WO2024003507A1/fr not_active Ceased
- 2023-06-28 US US18/878,490 patent/US20250389208A1/en active Pending
- 2023-06-28 EP EP23755121.3A patent/EP4547947A1/fr active Pending
- 2023-06-28 CN CN202380050050.8A patent/CN119452152A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3137407A1 (fr) | 2024-01-05 |
| WO2024003507A1 (fr) | 2024-01-04 |
| US20250389208A1 (en) | 2025-12-25 |
| CN119452152A (zh) | 2025-02-14 |
| FR3137407B1 (fr) | 2024-05-24 |
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