WO2009122057A1 - Deshuileur centrifuge a section de passage variable - Google Patents
Deshuileur centrifuge a section de passage variable Download PDFInfo
- Publication number
- WO2009122057A1 WO2009122057A1 PCT/FR2009/050400 FR2009050400W WO2009122057A1 WO 2009122057 A1 WO2009122057 A1 WO 2009122057A1 FR 2009050400 W FR2009050400 W FR 2009050400W WO 2009122057 A1 WO2009122057 A1 WO 2009122057A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- piston
- shaft
- oiler
- oil chamber
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/70—Slinger plates or washers
Definitions
- the present invention relates to the general field of devices for separating air from oil from an air / oil mixture.
- a particular field of application of the invention is that of gas turbine engine engines (turbojets and turboprops).
- Gas turbine engine engines include enclosures containing bearings and gears that are lubricated and cooled by oil.
- joints are arranged between the rotating parts and the fixed parts of the enclosures, or even between the rotating parts themselves.
- seal technologies available those offering the longest life are labyrinth seals and brush seals, the contact between the parts being non-existent in the first case and very limited in the second.
- the present invention aims to remedy the aforementioned drawbacks by proposing a de-oiler capable of ensuring a perfect seal of the air / oil chambers regardless of the engine operating phases while guaranteeing the lowest consumption of fuel. oil possible.
- a centrifugal de-oiler with variable section comprising a hollow cylindrical shaft movable in rotation about its axis of revolution, the shaft having at least one air passage opening opening into an air / oil chamber and opening inside the shaft, and a piston housed in the shaft so as to divide the interior of the shaft into two watertight compartments with respect to each other, the compartment provided with the air passage orifices being subjected to an ambient pressure and the other compartment being subjected to the variable pressure of the air / oil chamber, under the effect of a pressure difference between the two compartments, the piston being able to move in translation within the shaft between two extreme positions, a first position in which the orifices for the passage of air are disengaged and a second position, different from the first, in which the or the openings of Air is partially blocked by the piston.
- the air passage section passing through the orifices of the shaft of the de-oiler is a function of the pressure difference between the pressure inside the air / oil chamber and the ambient pressure corresponding to the pressure. venting the tree.
- the higher the air flow passing through the seals of the air / oil chamber the greater the pressure inside the enclosure and the greater the section of passage of air through the de-oiler. can be reduced (by moving the piston to its second position). In this way, it is possible to vary the air passage section in the de-oiler as a function of the pressure inside the air / oil chamber, and thus to limit the flow of air passing through the joints. the tightness necessary to ensure the tightness of the enclosure. This results in low oil consumption during all phases of engine operation.
- the piston comprises a shaft centered on the axis of revolution and able to slide inside fixed rings in order to ensure axial guidance of the piston.
- at least one of the rings advantageously forms an axial upstream stop for the piston.
- the de-oiler further comprises an annular shoulder which is integral with the shaft and which forms a downstream axial abutment for the piston.
- the de-oiler further comprises a spring wound around the shaft to maintain the piston in its first position in case of too low pressurization of the air / oil chamber.
- Each air passage orifice may open into the air / oil chamber via a chimney extending in a substantially radial direction.
- the invention also relates to a gas turbine engine with at least one centrifugal de-oiler as defined above.
- FIG. 1 is a view showing a centrifugal de-oiler according to the invention in an exemplary environment
- - Figure 2 is a longitudinal sectional view of the de-oiler of Figure 1 in one of its two extreme positions; and - Figure 3 is a longitudinal sectional view of the de-oiler of Figure 1 in the other of its two extreme positions.
- FIG. 1 shows, in longitudinal section, an air / oil chamber 10 of a turbojet engine provided with a centrifugal de-oiler according to the invention.
- the present invention applies to other types of air / oil enclosures present in a gas turbine engine, for example those present in the accessory drive housing of a turbojet engine.
- the air / oil chamber 10 contains in particular rolling bearings 12 which need to be cooled and lubricated by injecting oil continuously between the bearing rings of these bearings by means of injection nozzles (not shown on the face).
- rolling bearings 12 which need to be cooled and lubricated by injecting oil continuously between the bearing rings of these bearings by means of injection nozzles (not shown on the face).
- injection nozzles not shown on the face.
- an accessory gearbox in addition to the bearings, it is also the gears that need to be cooled and lubricated by oil injection.
- seals 14 between the rotating parts and the fixed parts of the enclosure.
- these joints are four in number and are of the labyrinth type.
- a flow of compressed air is introduced into the air / oil chamber 10 through the seals 14 to pressurize the enclosure and thus ensure a perfect seal thereof.
- This air flow comes for example from a sampling on a stage of a turbojet compressor (shown schematically by the arrows 16 in Figure 1).
- the air / oil chamber 10 further comprises a centrifugal de-oiler 18 according to the invention.
- the dehuller 18 comprises a hollow cylindrical shaft 20 which is rotatable about its axis of revolution 22.
- the shaft is for example driven in rotation directly by the main shaft 24 of the turbojet engine ( see Figure 1).
- the hollow shaft 20 has a plurality of air passages 26 which open into the air / oil chamber 10 and open inside the hollow shaft. As shown in FIG. 2, these orifices 26 are for example oblong and regularly distributed around the axis 22.
- the centrifugal de-oiler is of the chimney type, that is to say that the air passage openings 26 each open into the air / oil chamber 10 by means of intermediate of a chimney 28 extending in a substantially radial direction.
- Other types of de-oilers are however possible (de-oiler with honeycomb, metal foam, etc.).
- the principle of separation of the oil from the air is as follows: the air / oil chamber 10 being in overpressure with respect to the inside of the shaft, the air / oil mixture present in the enclosure enters the radial funnels 28 of the de-oiler. The droplets of oil suspended in this mixture will be "captured" by the internal walls of the chimneys. The shaft 20 - and therefore the chimneys 28 - of the de-oiler being in rotation, the oil captured by the internal walls of the chimneys will flow radially outwards under the effect of the centrifugal force and thus return to the air / oil enclosure 10. In parallel, the deoiled air will borrow the air passage holes 26 and flow inside the shaft downstream thereof to be evacuated to the outside of the turbojet.
- a piston 30 is housed in the hollow shaft 20 of the de-oiler.
- This piston comprises in particular a disc 30a which is centered on the axis of revolution 22 and which extends at its periphery by an annular flange 30b.
- the piston 30 of the de-oiler transversely divides the inside of the shaft into two sealed compartments with respect to each other: a downstream compartment 32a which comprises the air passage holes 26 and an upstream compartment 32b.
- the downstream compartment 32a communicates directly with the outside of the turbojet engine (at the downstream end not shown of the main shaft 24 of the turbojet engine). It is therefore subjected to the ambient ambient pressure P1 which is substantially constant (at iso altitude).
- the upstream compartment 32b As for the upstream compartment 32b, it is placed in communication with the air / oil chamber 10 via one or more bores 34 (see Figure 1). It is therefore subject to the pressure £ 2 prevailing inside of the air / oil chamber, this pressure being variable according to the flow of air entering the enclosure through the seals 14,
- the piston 30 of the de-oiler 18 is able to move in translation inside the hollow shaft 20.
- the piston 30 comprises a shaft 36 centered on the axis 22, integral with the disc 30a and slidable inside two fixed rings - an upstream ring 38a and a downstream ring 38b - which ensure a axial guidance of the piston.
- the piston 30 of the de-oiler can move in translation between two extreme positions: a first position shown in Figure 2 in which the air passage holes 26 are fully disengaged (piston moved upstream) and a second position shown in Figure 3, different from the first, wherein the passage holes are partially obstructed by its flange 30b (piston moved downstream).
- the piston 30 of the de-oiler moves under the effect of a pressure difference between the two compartments 32a, 32b. More precisely, since the ambient pressure ⁇ 1 inside the downstream compartment 32a is substantially constant (at iso altitude), the piston moves according to the level of pressure ⁇ 2 prevailing inside the air / oil enclosure 10.
- the first position of the piston 30 of the de-oiler is defined by the upstream ring 38a which forms an axial upstream stop for the piston.
- a spring 40 working in compression is wound around the shaft 36 of the piston and bears at its ends on the disc 30a of the piston and on the downstream ring 38b.
- This spring makes it possible to maintain the piston in its first extreme position in the event of too low pressure inside the air / oil chamber and thus to guarantee in this situation a section of passage of air sufficiently large to ensure the tightness the air / oil chamber at the joints 14.
- the second position of the piston 30 of the de-oiler ( Figure 3) is defined by an annular shoulder 42 which forms a downstream axial abutment for the piston.
- This shoulder which is integral with the shaft 20 of the de-oiler forms a decrease in the diameter of the shaft, thus preventing any sliding of the piston beyond it.
- the de-oiler may have alternative embodiments not shown in the figures.
- the radial chimneys 28 described above could be filled by a honeycomb structure or a metal foam whose cells are used to collect the oil droplets suspended in the air / oil mixture.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09727893T ES2389598T3 (es) | 2008-03-12 | 2009-03-11 | Desaceitador centrífugo de sección de paso variable |
US12/867,506 US20100307167A1 (en) | 2008-03-12 | 2009-03-11 | Centrifugal de-oiler of variable flow section |
CN200980108687.8A CN101970807B (zh) | 2008-03-12 | 2009-03-11 | 可变流量断面的离心除油器 |
RU2010141723/06A RU2477806C2 (ru) | 2008-03-12 | 2009-03-11 | Центробежный маслоотделитель с переменным проходным сечением |
EP09727893A EP2260184B1 (fr) | 2008-03-12 | 2009-03-11 | Deshuileur centrifuge a section de passage variable |
JP2010550244A JP5535948B2 (ja) | 2008-03-12 | 2009-03-11 | 可変チャネルを有する遠心脱油装置 |
CA2715190A CA2715190A1 (fr) | 2008-03-12 | 2009-03-11 | Deshuileur centrifuge a section de passage variable |
BRPI0908488-6A BRPI0908488A2 (pt) | 2008-03-12 | 2009-03-11 | Separador de óleo centrífugo de seção de passagem variável e motor de avião de turbina a gás |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0851608 | 2008-03-12 | ||
FR0851608A FR2928566B1 (fr) | 2008-03-12 | 2008-03-12 | Deshuileur centrifuge a section de passage variable |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009122057A1 true WO2009122057A1 (fr) | 2009-10-08 |
Family
ID=40042532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2009/050400 WO2009122057A1 (fr) | 2008-03-12 | 2009-03-11 | Deshuileur centrifuge a section de passage variable |
Country Status (10)
Country | Link |
---|---|
US (1) | US20100307167A1 (fr) |
EP (1) | EP2260184B1 (fr) |
JP (1) | JP5535948B2 (fr) |
CN (1) | CN101970807B (fr) |
BR (1) | BRPI0908488A2 (fr) |
CA (1) | CA2715190A1 (fr) |
ES (1) | ES2389598T3 (fr) |
FR (1) | FR2928566B1 (fr) |
RU (1) | RU2477806C2 (fr) |
WO (1) | WO2009122057A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9988938B2 (en) | 2013-11-19 | 2018-06-05 | Rolls-Royce Deutschland Ltd & Co Kg | Jet engine comprising a device for spraying oil |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2986043B1 (fr) * | 2012-01-24 | 2014-02-14 | Snecma | Conduit d'ejection comportant une trappe de drainage d'huile |
US9284866B2 (en) | 2012-05-25 | 2016-03-15 | Hamilton Sundstrand Corporation | Valve bypass |
US9194254B2 (en) | 2012-05-25 | 2015-11-24 | Hamilton Sundstrand Corporation | Reduced velocity valve |
FR2991386B1 (fr) | 2012-06-05 | 2014-07-18 | Snecma | Turbomachine comportant des moyens de fixation amont d'un tube de deshuilage |
FR2993024B1 (fr) * | 2012-07-06 | 2014-08-08 | Snecma | Dispositif de joint d'etancheite de palier de turbomachine avec deux joints elastiques |
US20150198234A1 (en) * | 2014-01-14 | 2015-07-16 | Caterpillar Inc. | Deaerator Apparatus |
FR3019996B1 (fr) | 2014-04-16 | 2018-02-09 | Safran Transmission Systems | Dispositif de filtrage d'un flux gaz/particules |
US10385729B2 (en) | 2015-11-24 | 2019-08-20 | General Electric Company | Cylindrical air guide in a turbine engine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2111607A (en) * | 1981-12-08 | 1983-07-06 | Rolls Royce | Bearing chamber pressurisation system for a machine |
FR2622469A1 (fr) * | 1987-11-03 | 1989-05-05 | Mtu Muenchen Gmbh | Separateur d'huile et d'air |
US6033450A (en) * | 1995-12-21 | 2000-03-07 | United Technologies Corporation | Deoiler shaft vortex separator |
EP1582703A2 (fr) * | 2004-03-31 | 2005-10-05 | United Technologies Corporation | Agencement de séparation d'huile pour un système de lubrification |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4795561A (en) * | 1987-01-23 | 1989-01-03 | Aeroquip Corporation | Self regulating cyclonic separator |
FR2696655B1 (fr) * | 1992-10-14 | 1994-11-10 | Snecma | Appareil pour séparer une suspension de liquide dans un gaz. |
US5971012A (en) * | 1993-06-01 | 1999-10-26 | Skoglund; Paul K. | Constant flow control valve having matable piston sleeve and outlet cover |
CA2128968C (fr) * | 1993-07-30 | 2000-05-02 | Junsuke Yabumoto | Appareil de separation par barbotage |
FR2742804B1 (fr) * | 1995-12-20 | 1998-01-16 | Snecma | Rotor deshuileur pour enceinte de lubrification |
RU2215886C2 (ru) * | 2001-11-28 | 2003-11-10 | Открытое акционерное общество "Авиадвигатель" | Опора подшипника газотурбинного двигателя |
RU2200255C1 (ru) * | 2002-02-26 | 2003-03-10 | Общество с ограниченной ответственностью "Сургутгазпром" | Газоперекачивающий агрегат компрессорной станции магистрального газопровода |
JP4296829B2 (ja) * | 2003-04-28 | 2009-07-15 | 株式会社Ihi | オイルミストの捕集方法およびオイルミストセパレータ |
US7063734B2 (en) * | 2004-03-23 | 2006-06-20 | Pratt & Whitney Canada Corp. | Air/oil separation system and method |
-
2008
- 2008-03-12 FR FR0851608A patent/FR2928566B1/fr not_active Expired - Fee Related
-
2009
- 2009-03-11 CN CN200980108687.8A patent/CN101970807B/zh active Active
- 2009-03-11 BR BRPI0908488-6A patent/BRPI0908488A2/pt not_active IP Right Cessation
- 2009-03-11 CA CA2715190A patent/CA2715190A1/fr not_active Abandoned
- 2009-03-11 RU RU2010141723/06A patent/RU2477806C2/ru not_active IP Right Cessation
- 2009-03-11 EP EP09727893A patent/EP2260184B1/fr active Active
- 2009-03-11 ES ES09727893T patent/ES2389598T3/es active Active
- 2009-03-11 US US12/867,506 patent/US20100307167A1/en not_active Abandoned
- 2009-03-11 JP JP2010550244A patent/JP5535948B2/ja not_active Expired - Fee Related
- 2009-03-11 WO PCT/FR2009/050400 patent/WO2009122057A1/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2111607A (en) * | 1981-12-08 | 1983-07-06 | Rolls Royce | Bearing chamber pressurisation system for a machine |
FR2622469A1 (fr) * | 1987-11-03 | 1989-05-05 | Mtu Muenchen Gmbh | Separateur d'huile et d'air |
US6033450A (en) * | 1995-12-21 | 2000-03-07 | United Technologies Corporation | Deoiler shaft vortex separator |
EP1582703A2 (fr) * | 2004-03-31 | 2005-10-05 | United Technologies Corporation | Agencement de séparation d'huile pour un système de lubrification |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9988938B2 (en) | 2013-11-19 | 2018-06-05 | Rolls-Royce Deutschland Ltd & Co Kg | Jet engine comprising a device for spraying oil |
Also Published As
Publication number | Publication date |
---|---|
EP2260184B1 (fr) | 2012-07-25 |
CA2715190A1 (fr) | 2009-10-08 |
RU2477806C2 (ru) | 2013-03-20 |
EP2260184A1 (fr) | 2010-12-15 |
FR2928566A1 (fr) | 2009-09-18 |
FR2928566B1 (fr) | 2010-04-16 |
US20100307167A1 (en) | 2010-12-09 |
BRPI0908488A2 (pt) | 2015-08-18 |
ES2389598T3 (es) | 2012-10-29 |
RU2010141723A (ru) | 2012-04-20 |
JP2011513648A (ja) | 2011-04-28 |
JP5535948B2 (ja) | 2014-07-02 |
CN101970807A (zh) | 2011-02-09 |
CN101970807B (zh) | 2013-11-06 |
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