WO2012131209A1 - Ensemble de joint d'étanchéité anti-feu et nacelle comprenant un tel joint - Google Patents
Ensemble de joint d'étanchéité anti-feu et nacelle comprenant un tel joint Download PDFInfo
- Publication number
- WO2012131209A1 WO2012131209A1 PCT/FR2012/050527 FR2012050527W WO2012131209A1 WO 2012131209 A1 WO2012131209 A1 WO 2012131209A1 FR 2012050527 W FR2012050527 W FR 2012050527W WO 2012131209 A1 WO2012131209 A1 WO 2012131209A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nacelle
- seal
- seal assembly
- joint assembly
- primary nozzle
- Prior art date
Links
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings, or cowlings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/24—Heat or noise insulation
- F02C7/25—Fire protection or prevention
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/78—Other construction of jet pipes
- F02K1/80—Couplings or connections
- F02K1/805—Sealing devices therefor, e.g. for movable parts of jet pipes or nozzle flaps
-
- 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
- F05D2240/14—Casings or housings protecting or supporting assemblies within
-
- 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
- F05D2240/59—Lamellar 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
- the invention relates to a seal assembly for a jet engine nacelle engine nacelle for an aircraft, and to a nacelle equipped with such a seal assembly.
- An aircraft is driven by several turbojets each housed in a nacelle also housing a set of ancillary actuators related to its operation and providing various functions, when the turbojet engine is in operation or stopped.
- a nacelle generally has a tubular structure comprising an air inlet in front of the turbojet engine, a median section intended to surround a fan of the turbojet engine, a rear section intended to surround the combustion chamber of the turbojet engine and able to house means of combustion. thrust reversal.
- the modern nacels are often intended to house a turbofan engine capable of generating, through the blades of the rotating fan and the compressor, a hot air flow (also called primary flow) from the combustion chamber turbojet engine and turbine.
- the compressor assembly, combustion chamber and turbine is the gas generator of the turbojet, also called heart (or core).
- a nacelle generally comprises an external structure, which defines, with a concentric internal structure of the rear section, called Inner Fixed Structure (IFS) surrounding the turbojet core behind the fan, an annular flow channel, also called secondary vein, for channeling a cold air flow, said secondary, which circulates outside the turbojet engine.
- IFS Inner Fixed Structure
- the rear structure of the turbojet engine core is terminated by a so-called primary nozzle ensuring the ejection of the hot air flow, the external structure of the nacelle being, in turn, generally terminated by a secondary nozzle, which may be of variable section. and optimizing the ejection of the cold secondary flow.
- the internal structure thus constitutes a cowling around the turbojet engine core and may be designated by various names, in particular, a rear core cowl (Aft Core Cowl, ACC).
- the core cover and the primary nozzle are two distinct structures that can notably move relative to each other, for example example because of longitudinal expansion phenomena, variations in flight conditions, or the geometry of the whole. There are also transverse displacements between the heart cover and a pylon of attachment of the nacelle.
- the core cover can in particular be dismountable and / or mobile, so as to allow access to the heart of the turbojet engine.
- One of the disassembly / displacement of the core cover involves in particular a rearward translation of the assembly.
- the primary nozzle can also be dismountable so as, for example, to facilitate its replacement if necessary.
- the rear of the turbojet engine is also generally attached to the pylon at a rear attachment point and the interface with the primary nozzle can also be performed at the area of this rear attachment point.
- the primary nozzle / pylon interface thus constitutes an interface zone which, although having a slightly different behavior, in particular by the fact that the relative longitudinal displacements vary, is also concerned by the problems previously raised.
- a seal is therefore provided between the rear core cover and the primary nozzle, and / or between the pylon and the primary nozzle, this seal being deformable so as to take account of the phenomena of mainly longitudinal and transverse relative displacements in a lesser degree. measured.
- propulsion system certification constraints require fire protection in a quadrant of 90 degrees higher, ie 45 degrees on each side of a substantially vertical axis, between the engine core compartment and the outside of the nacelle. .
- This seal must also provide fire protection between the engine core cover, the primary nozzle and the pylon, so as to prevent the spread of a fire to or from the engine.
- seals currently used at such interfaces are generally seam-type seals (also known as finger seals) consisting of a double row of thin metal blades attached to either the primary nozzle or at the engine core cover and rubbing on a bearing surface of the opposite part (respectively the core cover or the primary nozzle). Examples of such seals are described in documents US 5,910,094 in particular.
- the present invention aims to overcome the disadvantages mentioned above and to propose a new structure of fire-proof seal.
- the present invention consists for this purpose in a turbojet nacelle seal assembly comprising a first end equipped with fastening means on at least a first structure, and a second end adapted to come into contact against a bearing zone. a second structure, the seal assembly comprising a plurality of lamellae the adj acents are positioned along the first end and extend in a relatively long direction and perpendicular to the latter, characterized in that at least a portion of the slats has an accordion structure.
- At least a portion of the slats are metallic.
- At least a portion of the slats are of deformable elastic material, of the polymer, rubber or composite type.
- the second end intended to come into contact with a bearing zone of the second structure is in the form of an interface plate, continuous or piecewise discontinuous.
- the second end intended to come into contact with a support zone of the second structure comprises elastic support beads.
- the second end is intended to come into contact on a support zone of the second structure by a non-slip contact.
- the seal assembly comprises two or more rows of lamellae.
- the lamellae of the rows are offset laterally or circumferentially between them.
- "baffles" are formed between the lamellae of the rows, which increases the fire tightness.
- the s e r n g e d of the m l l s are n t sufficiently spaced to allow compression and relaxation accordions without interference with a neighboring row.
- the first end of the seal assembly is fixed in the core cover.
- the turbojet nacelle comprises at least one pylon of attachment of the nacelle and at least one primary nozzle, characterized in that at least a part of the zone between the pylon and the primary nozzle is equipped with least one seal assembly according to the invention.
- the first end of the seal assembly is fixed on the pylon.
- the first end of the seal assembly is attached to the primary nozzle.
- the portion of the equipated interface of the joint assembly comprises at least an upper portion extending on either side of a plane of a connecting pylon.
- FIG. 1 is a partial diagrammatic representation of an internal rear part of a turbojet engine nacelle showing a view of being a primary engine and a pylon / engine hood equipped with an anti-fire gasket. the invention;
- FIGS. 2 to 4 are diagrammatic representations in longitudinal section of the zone of FIG. 1, the gasket according to the invention being respectively installed on the hood (FIGS. 2 and 3), and on a pylon support (FIG. 4);
- FIGS. 5 to 7 are schematic representations of the operation of a seal according to a variant of the invention in configuration respectively nominal, compressed, and free.
- FIG. 1 is a partial schematic representation of an internal rear part of a turbojet engine nacelle showing an interface between a primary nozzle 1 00 and a core cover 200, said interface being equipped at the top of a fire-resistant seal 300 extending from both sides around a substantially transverse plane corresponding to a latching plane to a pylon (not visible), most frequently a plane therefore substantially vertical.
- the heart cover 200 remains easily translatable downstream, over the primary nozzle 100.
- This rear portion of the turbojet engine 500 is surrounded by a heart cover 200 mounted to move in translation towards the rear of the turbojet engine.
- the seal 300 comprises a first end 301 fixed in the upstream return January 01 of the primary nozzle 1 00 and a second end 302 designed to come into contact against a bearing zone 202 formed in the downstream return 201 of the core cover 200.
- At least a portion of the slats 303 have an accordion structure.
- the lamellae 303 may in all or part be made of metal and / or deformable elastic material of rubber or composite type.
- the seal 300 comprises two rows of radially spaced strips, and in particular sufficiently spaced to allow without embarrassment the compression of the strips 303 of each row.
- the lamels 303 of the two rows will be offset laterally or circumferentially between them so as to form baffles.
- the second end designed to come into contact with the core cover 200, may be made in the form of an interface plate 302, continuous or discontinuous in pieces, interconnecting a plurality of ends of the lamellae 303.
- the interface plates 302 may be equipped with elastic support beads making it possible, if necessary, to improve the non-sliding nature of the support end.
- FIG. 4 shows an alternative installation of the gasket 300 according to the invention, differing in that the gasket 300 is disposed at an interface between the primary nozzle 100 and the pylon 400, via a return having a bearing zone 405.
- Figures 5 to 7 are schematic representations of the operation of a seal according to the invention in configuration respectively nominal, compressed and free.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Gasket Seals (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013147724/06A RU2013147724A (ru) | 2011-03-30 | 2012-03-14 | Узел противопожарного уплотнения и гондола, снабженная таким узлом |
BR112013023408A BR112013023408A2 (pt) | 2011-03-30 | 2012-03-14 | montagem de vedação para uma nacela de turbojato e nacela de motor turbojato |
CN2012800163205A CN103477054A (zh) | 2011-03-30 | 2012-03-14 | 防火密封组件和包括这种密封组件的发动机舱 |
EP12714771.8A EP2691625A1 (fr) | 2011-03-30 | 2012-03-14 | Ensemble de joint d'étanchéité anti-feu et nacelle comprenant un tel joint |
CA2829267A CA2829267A1 (fr) | 2011-03-30 | 2012-03-14 | Ensemble de joint d'etancheite anti-feu et nacelle comprenant un tel joint |
US14/040,972 US8925332B2 (en) | 2011-03-30 | 2013-09-30 | Anti-fire seal assembly and nacelle comprising such a seal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR11/52620 | 2011-03-30 | ||
FR1152620A FR2973439B1 (fr) | 2011-03-30 | 2011-03-30 | Ensemble de joint d'etancheite anti-feu et nacelle comprenant un tel joint |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/040,972 Continuation US8925332B2 (en) | 2011-03-30 | 2013-09-30 | Anti-fire seal assembly and nacelle comprising such a seal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012131209A1 true WO2012131209A1 (fr) | 2012-10-04 |
Family
ID=45974396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/050527 WO2012131209A1 (fr) | 2011-03-30 | 2012-03-14 | Ensemble de joint d'étanchéité anti-feu et nacelle comprenant un tel joint |
Country Status (8)
Country | Link |
---|---|
US (1) | US8925332B2 (fr) |
EP (1) | EP2691625A1 (fr) |
CN (1) | CN103477054A (fr) |
BR (1) | BR112013023408A2 (fr) |
CA (1) | CA2829267A1 (fr) |
FR (1) | FR2973439B1 (fr) |
RU (1) | RU2013147724A (fr) |
WO (1) | WO2012131209A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103612747A (zh) * | 2013-11-27 | 2014-03-05 | 中国航空工业集团公司西安飞机设计研究所 | 一种发动机短舱密封防火组件 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10450898B2 (en) | 2015-02-13 | 2019-10-22 | United Technologies Corporation | Track fairing assembly for a turbine engine nacelle |
FR3064605A1 (fr) * | 2017-03-28 | 2018-10-05 | Airbus Operations | Systeme de joints feu metalliques pour une attache moteur d'un aeronef |
CN107472505B (zh) * | 2017-07-14 | 2020-04-07 | 哈尔滨飞机工业集团有限责任公司 | 一种用于飞机桁架结构中的防火封严板 |
US20190276157A1 (en) * | 2018-03-08 | 2019-09-12 | Bell Helicopter Textron Inc. | Flexible radial inlet plenum |
FR3085183B1 (fr) | 2018-08-22 | 2020-09-11 | Safran Nacelles | Dispositif anti-feu de fermeture d’espaces au niveau de jointures d’une nacelle et nacelle comprenant un tel dispositif |
RU204071U1 (ru) * | 2020-07-07 | 2021-05-05 | Общество с ограниченной ответственностью "Объединенный Промышленный Комплекс" | Противопожарное уплотнение |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2613087A (en) * | 1948-12-24 | 1952-10-07 | Gen Electric | Flexible conduit joint |
US5524846A (en) * | 1993-12-21 | 1996-06-11 | The Boeing Company | Fire protection system for airplanes |
EP0838615A2 (fr) * | 1996-10-25 | 1998-04-29 | The Boeing Company | Soufflet à pression augmentée |
US5910094A (en) | 1996-09-10 | 1999-06-08 | The Boeing Company | Aircraft labyrinth fire seal |
WO2006000781A1 (fr) | 2004-06-23 | 2006-01-05 | Dunlop Aerospace Limited | Ensemble joint d'etancheite resistant au feu |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5238658A (en) * | 1975-09-22 | 1977-03-25 | Nissan Motor Co Ltd | Sealing device for heat exchanger of rotary heat conserving type |
US4453722A (en) * | 1982-12-20 | 1984-06-12 | United Technologies Corporation | Seal means |
US4813608A (en) * | 1986-12-10 | 1989-03-21 | The United States Of America As Represented By The Secretary Of The Air Force | Bimetallic air seal for exhaust nozzles |
US5156360A (en) * | 1991-04-08 | 1992-10-20 | The Boeing Company | Flexible fire seal for overlapping cowl side edges |
US6227546B1 (en) * | 1999-03-26 | 2001-05-08 | Jetseal, Inc. | Resilient seal and method of using a resilient seal |
IT249780Y1 (it) * | 2000-03-17 | 2003-05-28 | Artemide Spa | Dispositivo di illuminazione polivalente |
US6547257B2 (en) * | 2001-05-04 | 2003-04-15 | General Electric Company | Combination transition piece floating cloth seal and stage 1 turbine nozzle flexible sealing element |
GB2385382B (en) * | 2002-02-13 | 2006-02-15 | Rolls Royce Plc | A cowl structure for a gas turbine engine |
US6792763B2 (en) * | 2002-08-15 | 2004-09-21 | Power Systems Mfg., Llc | Coated seal article with multiple coatings |
US6834507B2 (en) * | 2002-08-15 | 2004-12-28 | Power Systems Mfg., Llc | Convoluted seal with enhanced wear capability |
US7152864B2 (en) * | 2003-10-02 | 2006-12-26 | Alstom Technology Ltd. | Seal assembly |
-
2011
- 2011-03-30 FR FR1152620A patent/FR2973439B1/fr not_active Expired - Fee Related
-
2012
- 2012-03-14 BR BR112013023408A patent/BR112013023408A2/pt not_active IP Right Cessation
- 2012-03-14 WO PCT/FR2012/050527 patent/WO2012131209A1/fr active Application Filing
- 2012-03-14 CA CA2829267A patent/CA2829267A1/fr not_active Abandoned
- 2012-03-14 CN CN2012800163205A patent/CN103477054A/zh active Pending
- 2012-03-14 RU RU2013147724/06A patent/RU2013147724A/ru not_active Application Discontinuation
- 2012-03-14 EP EP12714771.8A patent/EP2691625A1/fr not_active Withdrawn
-
2013
- 2013-09-30 US US14/040,972 patent/US8925332B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2613087A (en) * | 1948-12-24 | 1952-10-07 | Gen Electric | Flexible conduit joint |
US5524846A (en) * | 1993-12-21 | 1996-06-11 | The Boeing Company | Fire protection system for airplanes |
US5910094A (en) | 1996-09-10 | 1999-06-08 | The Boeing Company | Aircraft labyrinth fire seal |
EP0838615A2 (fr) * | 1996-10-25 | 1998-04-29 | The Boeing Company | Soufflet à pression augmentée |
WO2006000781A1 (fr) | 2004-06-23 | 2006-01-05 | Dunlop Aerospace Limited | Ensemble joint d'etancheite resistant au feu |
Non-Patent Citations (1)
Title |
---|
See also references of EP2691625A1 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103612747A (zh) * | 2013-11-27 | 2014-03-05 | 中国航空工业集团公司西安飞机设计研究所 | 一种发动机短舱密封防火组件 |
Also Published As
Publication number | Publication date |
---|---|
EP2691625A1 (fr) | 2014-02-05 |
CA2829267A1 (fr) | 2012-10-04 |
US8925332B2 (en) | 2015-01-06 |
FR2973439B1 (fr) | 2014-08-22 |
US20140026582A1 (en) | 2014-01-30 |
CN103477054A (zh) | 2013-12-25 |
BR112013023408A2 (pt) | 2016-12-13 |
RU2013147724A (ru) | 2015-05-10 |
FR2973439A1 (fr) | 2012-10-05 |
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