WO2012004486A1 - Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant - Google Patents
Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant Download PDFInfo
- Publication number
- WO2012004486A1 WO2012004486A1 PCT/FR2011/051388 FR2011051388W WO2012004486A1 WO 2012004486 A1 WO2012004486 A1 WO 2012004486A1 FR 2011051388 W FR2011051388 W FR 2011051388W WO 2012004486 A1 WO2012004486 A1 WO 2012004486A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- front frame
- flap
- upstream
- thrust
- deformable
- Prior art date
Links
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
- F02K1/54—Nozzles having means for reversing jet thrust
- F02K1/56—Reversing jet main flow
- F02K1/62—Reversing jet main flow by blocking the rearward discharge by means of flaps
-
- 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
- F02K1/54—Nozzles having means for reversing jet thrust
- F02K1/64—Reversing fan flow
- F02K1/70—Reversing fan flow using thrust reverser flaps or doors mounted on the fan housing
- F02K1/72—Reversing fan flow using thrust reverser flaps or doors mounted on the fan housing the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow
-
- 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
Definitions
- Thrust reversing device with aerodynamic junction Thrust reversing device with aerodynamic junction
- the present invention relates to a turbojet engine nacelle comprising a downstream section equipped with a thrust reverser device mounted on a front frame.
- An aircraft is driven by several turbojet engines each housed in a nacelle also housing a set of ancillary actuating devices related to its operation and providing various functions when the turbojet engine is in operation or stopped, such as for example, a system of operation. thrust reversal.
- a nacelle generally has a tubular structure comprising an air inlet upstream of the turbojet engine, a median section intended to surround a fan of the turbojet engine, a downstream section intended to surround the combustion chamber of the turbojet engine and housing, where appropriate, the means for thrust reversal, and is generally terminated by an ejection nozzle whose output is located downstream of the turbojet engine.
- the modern nacelles are intended to house a turbofan engine capable of generating through the blades of the rotating fan a flow of hot air (also called primary flow) from the combustion chamber of the turbojet engine, and a flow of cold air (secondary flow) flowing outside the turbojet through an annular passage, also called vein, formed between a shroud of the turbojet engine and an inner wall of the nacelle.
- the two air flows are ejected from the turbojet engine from the rear of the nacelle.
- the role of a thrust reverser is, during the landing of an aircraft, to improve the braking capacity thereof by redirecting forward at least a portion of the thrust generated by the turbojet engine.
- the inverter obstructs the cold flow vein and directs the latter towards the front of the nacelle, thereby generating a counter-thrust which is added to the braking of the wheels of the aircraft.
- an inverter comprises movable covers moved between, on the one hand, an extended position in which they open in the nacelle a passage for deviated flow, and secondly, a retracted position in which they close this passage.
- These covers can perform a deflection function (inverter with pivoting doors) or simply activation of other deflection means.
- a grid inverter also known as a cascade inverter
- the reorientation of the air flow is carried out by deflection grids, the hood having a simple sliding function aimed at discover or cover these grids.
- Complementary locking doors, also called shutters, activated by the shedding of the cowling, generally allow a closing of the vein downstream of the grids so as to optimize the reorientation of the cold flow.
- the downstream section comprises fixed elements and in particular longitudinal beams connected upstream. to a substantially annular assembly called front frame, formed in one or more parts between said longitudinal beams, and intended to be fixed to the periphery of the downstream edge of the fan housing of the engine.
- su pport com will typically take up two longitudinal beams said twelve hours, disposed on either side of a pylon of attachment of the nacelle or a pylon type interface, and two lower longitudinal beams said six hours.
- These beams also serve as support for guiding rails in translation of the movable covers.
- the front frame is then formed of two half-frames substantially hemicylindrical linking the upper and lower beams together on either side of a longitudinal axis of the nacelle.
- this front frame also serves to support the set of deflection grids disposed between said beams.
- the deflected air flows through the deflection grids from the flow passage between the front frame and an upstream edge of the retracted movable hood.
- the front frame in order to maximize the thrust reversal performance, the front frame must have a streamlined aerodynamic profile.
- a first line accident exists due to the mounting of the front frame on the fan case.
- an upstream edge of the interface between the front frame and the housing can be radiated outward.
- the flaps are movable about a downstream pivot axis and that the flap mounting interface is not waterproof. There will therefore necessarily be minimal scooping through the housing cavities of the locking flaps.
- the deflected flow remains disturbed by the first cavity which, by disturbing the flow of the air flow, causes a slight delay in the deflection of the air flow which no longer perfectly adheres to the edge of the flow. deflection of the front frame.
- the object of the present invention is to provide an alternative solution that does not have such disadvantages and aims for this purpose with a thrust reverser device for a turbojet engine nacelle comprising, on the one hand, deflection means and, on the other hand, at least one cover movable relative to at least one fixed structure comprising at least one front frame at least partially peripheral and equipped with connecting means to a corresponding upstream part, said movable cover being movably mounted between a closed position in which it ensures the aerodynamic continuity of the nacelle and deactivates the deflection means, to an open position in which it opens a passage in the nacelle and activates the deflection means, the thrust reverser device being characterized in that the front frame has a deflection edge comprising an upstream extension forming a deformable flap intended to come into aerodynamic interface av ec the corresponding upstream part to which the front frame is attached, and in that a portion of the movable cowl is shaped so as ven ven, in the closed position, in interface
- the latter may adopt a different configuration depending on the reverse thrust and pressure configurations in the turbojet engine.
- the upstream part of attachment of the front frame is a fan casing.
- the connecting means of the front frame to the upstream part of attachment are knife / throat type.
- the thrust reverser device is a thrust reverser with deflection grids, the movable cowl being movable in translation along a substantially longitudinal axis of the nacelle, covering and revealing the grids respectively in the closed and open position.
- the deflection grids are mounted on the front frame.
- the portion of the movable cowl shaped so as to force the deformable bib is a locking flap, in particular pivotally mounted by an upstream end on the movable cowl.
- it may be a dedicated upstream outgrowth of the movable cowl.
- the deformable bib is sectorized.
- the deformable flap is made from at least one elastomeric material.
- the deformable flap comprises a lamella core, optionally covered with a flexible coating.
- the deformable flap is in the form of a pivoting flap mounted against an elastic return means towards its direct jet interface position.
- the thrust reversal device comprises an abutment means limiting the return of the flap towards its direct jet interface position. This stop ensures optimal optimal positioning of the flap in its active configuration.
- this stop may be adjustable, discrete, and located on the upstream part of attachment.
- FIG. 1 is a diagrammatic representation in longitudinal section of a thrust reverser device according to the prior art.
- FIG. 2 is a partial schematic sectional representation of the device of Figure 1 equipped with a deformable flap according to a first embodiment.
- FIG. 3 is a partial schematic sectional representation of the device of Figure 1 equipped with a deformable flap according to a second embodiment.
- FIG. 4 is a schematic representation of an example of segmentation of the flap of FIG. 3.
- FIGS. 5 and 6 are exemplary embodiments of the invention with a combination of a stop at the flush flange, the abutment being respectively located on a front frame and on the movable cover.
- FIG. 7 is a schematic partial representation in which the thrust reverser device comprises a locking flap which interfaces with the flap.
- FIG. 8 is a diagrammatic representation in longitudinal section of an embodiment variant in which the upstream interface structure is an outgrowth of the movable cover.
- a thrust reversal device 1 with deflection grids 2 is shown schematically in longitudinal section in FIG. 1.
- Such a thrust reverser device 1 equips a rear section of a nacelle surrounding a turbojet engine (not visible) and defines with a fixed internal fairing structure 3 of a rear part of the turbojet engine, a vein 4 for the circulation of a secondary air flow generated by the turbojet engine.
- the thrust reverser device 1 comprises a movable cowl 5 mounted to be movable in translation along a substantially longitudinal axis of the nacelle between an open position in which the mobile cowl 5 is moved backwards, opens a passage in the nacelle and discovers the deflection grids 2, and a closed position in which it ensures the continuity of the nacelle and covers the deflection grids 2.
- the movable cowl 5 is movable relative to a fixed structure, comprising, on the one hand, supporting and guiding beams (not visible), and on the other hand, a front frame 6, said front frame 6 possibly being made in several parts, and in particular in two semicylindrical half-parts.
- the front frame 6 ensures the attachment of the thrust reverser device 1 to an upstream structure of the nacelle, in this case a casing 7 surrounding a blower of the turbojet engine via a link of the knife 8 / groove 9 type. at least partially peripheral.
- the front frame 6 also supports the deflection grilles 2.
- the front frame 6 is equipped with a deflection edge 10 coming in continuity with the casing 7 and defining a curve towards the outside of the nacelle .
- the deflection edge 10 has an upstream extension forming a deformable flange intended to come into aerodynamic interface with the casing 7 to which the front frame 6 is attached.
- a portion of the movable cover 5 is shaped so as to come, in the closed position, in interface with said upstream attachment part by forcing the deformable flap back.
- Figure 2 shows a deformable flap made in the form of a flap 111 pivoted about a transverse axis A and forced in aerodynamic continuity position with the housing 7 by a spring 112.
- the flap can be made in the form of a plurality of sectorized peripheral flaps 111.
- FIG. 3 shows a deformable flap made in the form of a tongue 121 made from an elastomer material and attached, in particular by gluing, in the upstream extension of the deflection edge 10.
- the tongue 121 can be made from a flexible lamella core and covered with a flexible coating allowing differences in positioning the lamellae between them.
- the bib can also be sectored.
- the constitution of the flap can also be very simple and, as shown in Figure 4, this flap can be achieved by a lamellar arrangement 123 and have cutouts 124 which, in the retracted position come into contact or close, and provide a day in inversion position.
- the tongue 1 21 flexible may be associated with a stop 25 retaining the interface position with the housing 7.
- this abutment 1 25 is situated on a peripheral edge of the casing 7 and cooperates with a corresponding flange 126 of the tongue 121.
- an abutment means can also be provided for the flaps made in the form of pivoting flaps 11 January 1 of Figure 2.
- the abutments 1 25 may be adjustable and discrete.
- this upstream portion may be a locking flap 15 pivotally mounted by an upstream end on the movable cowl 5.
- this locking flap 15 will be slightly extended upstream to interface with the casing 7 in place of the deformable flap.
- a sliding ramp 16 may be applied, in particular on an inner end of the flap 15.
- FIG. 8 shows a second embodiment in which the upstream part forcing the deformable flap in the retracted position and ensuring in its place the aerodynamic interface with the casing 7 is a fixed protrusion 1 8 of the movable cover 5 , the locking flap 17 remaining behind the upstream edge of the movable cowl 5.
- This technology can likewise be applied for a gate inverter without shutter, the inversion being allowed by the internal lines of the S-shaped secondary channel and which is obstructed by the only recoil of the mobile structure (inverter also called “ blockerless ").
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Turbines (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013000033A BR112013000033A2 (pt) | 2010-07-07 | 2011-06-17 | dispositivo de reversão de empuxo para uma nacela de motor turbojato |
RU2013104292/06A RU2574118C2 (ru) | 2010-07-07 | 2011-06-17 | Реверсор тяги, имеющий аэродинамическое сопряжение для передней рамы |
EP11744046.1A EP2591224A1 (fr) | 2010-07-07 | 2011-06-17 | Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant |
CN201180031628.2A CN102959223B (zh) | 2010-07-07 | 2011-06-17 | 具有用于前框架的空气动力耦合的推力反向器 |
CA2802655A CA2802655A1 (fr) | 2010-07-07 | 2011-06-17 | Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant |
US13/735,096 US8769926B2 (en) | 2010-07-07 | 2013-01-07 | Thrust reverser having an aerodynamic coupling for a front frame |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1055498 | 2010-07-07 | ||
FR1055498A FR2962492B1 (fr) | 2010-07-07 | 2010-07-07 | Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/735,096 Continuation US8769926B2 (en) | 2010-07-07 | 2013-01-07 | Thrust reverser having an aerodynamic coupling for a front frame |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012004486A1 true WO2012004486A1 (fr) | 2012-01-12 |
Family
ID=43063450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2011/051388 WO2012004486A1 (fr) | 2010-07-07 | 2011-06-17 | Dispositif d'inversion de poussee avec jonction aerodynamique de cadre avant |
Country Status (7)
Country | Link |
---|---|
US (1) | US8769926B2 (fr) |
EP (1) | EP2591224A1 (fr) |
CN (1) | CN102959223B (fr) |
BR (1) | BR112013000033A2 (fr) |
CA (1) | CA2802655A1 (fr) |
FR (1) | FR2962492B1 (fr) |
WO (1) | WO2012004486A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2584184A3 (fr) * | 2011-10-17 | 2017-06-14 | Rolls-Royce plc | Tuyère à section variable pour un moteur de turbine à gaz |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2995026B1 (fr) * | 2012-09-03 | 2019-06-07 | Safran Nacelles | Cadre avant pour une structure d'inverseur de poussee a grilles de deviation |
US10184426B2 (en) * | 2015-06-22 | 2019-01-22 | Rohr, Inc. | Thrust reverser with forward positioned blocker doors |
US10605198B2 (en) * | 2016-04-15 | 2020-03-31 | Rohr, Inc. | Nacelle thrust reverser |
FR3078951B1 (fr) * | 2018-03-13 | 2020-02-28 | Airbus Operations | Turboreacteur comportant une nacelle equipee d'un carter de soufflante et d'une structure fixe |
CN109854409B (zh) * | 2019-03-18 | 2021-05-11 | 北京航空航天大学 | 一种伞式反推结构 |
FR3100578B1 (fr) * | 2019-09-05 | 2021-09-24 | Safran Nacelles | Inverseur de poussée muni d’une cinématique à câble pour volets écopants |
FR3110639B1 (fr) * | 2020-05-20 | 2022-09-16 | Safran Nacelles | Inverseur de poussee pour une nacelle d’un turboreacteur a double flux d’aeronef |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4185798A (en) | 1978-03-13 | 1980-01-29 | Rohr Industries, Inc. | Thrust reverser-cascade two door pre-exit |
FR2936222A1 (fr) * | 2008-09-24 | 2010-03-26 | Aircelle Sa | Nacelle a section de tuyere variable |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2161862B (en) * | 1983-05-27 | 1988-05-05 | Pierre Giraud | Double flow turbine engine equipped with a thrust reverser |
US5239822A (en) * | 1992-01-14 | 1993-08-31 | The Boeing Company | Composite structure for thrust reverser torque box |
US5575147A (en) * | 1994-12-22 | 1996-11-19 | United Technologies Corporation | Compact thrust reverser |
US5806302A (en) * | 1996-09-24 | 1998-09-15 | Rohr, Inc. | Variable fan exhaust area nozzle for aircraft gas turbine engine with thrust reverser |
FR2754313B1 (fr) * | 1996-10-03 | 1999-01-08 | Hispano Suiza Sa | Inverseur de poussee a portes a installation de verin de commande optimisee |
FR2758161B1 (fr) * | 1997-01-09 | 1999-02-05 | Hispano Suiza Sa | Inverseur de poussee a grilles a installation de verin de commande optimisee |
FR2783018B1 (fr) * | 1998-09-03 | 2000-10-13 | Hispano Suiza Sa | Nacelle de turboreacteur a double flux a element mobile mis a la masse |
FR2804474B1 (fr) * | 2000-01-27 | 2002-06-28 | Hispano Suiza Sa | Inverseur de poussee a grilles aubagees de deviation a structure arriere fixe |
FR2830051B1 (fr) * | 2001-09-27 | 2003-11-07 | Hurel Hispano Le Havre | Systeme de verrouillage sur un inverseur de poussee a grilles |
FR2914957B1 (fr) * | 2007-04-13 | 2012-05-11 | Aircelle Sa | Joint notamment pour bord de deviation d'inverseur de poussee a grilles pour avion et support de joint associe |
FR2920137B1 (fr) * | 2007-08-20 | 2009-09-18 | Aircelle Sa | Fixation d'une structure d'une nacelle de turboreacteur par bride couteau/gorge renforcee |
FR2920199B1 (fr) * | 2007-08-20 | 2009-10-30 | Aircelle Sa | Capot mobile d'inverseur de poussee et inverseur de poussee equipe d'un tel capot mobile |
US8201390B2 (en) * | 2007-12-12 | 2012-06-19 | Spirit Aerosystems, Inc. | Partial cascade thrust reverser |
-
2010
- 2010-07-07 FR FR1055498A patent/FR2962492B1/fr active Active
-
2011
- 2011-06-17 WO PCT/FR2011/051388 patent/WO2012004486A1/fr active Application Filing
- 2011-06-17 BR BR112013000033A patent/BR112013000033A2/pt not_active IP Right Cessation
- 2011-06-17 EP EP11744046.1A patent/EP2591224A1/fr not_active Withdrawn
- 2011-06-17 CA CA2802655A patent/CA2802655A1/fr not_active Abandoned
- 2011-06-17 CN CN201180031628.2A patent/CN102959223B/zh not_active Expired - Fee Related
-
2013
- 2013-01-07 US US13/735,096 patent/US8769926B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4185798A (en) | 1978-03-13 | 1980-01-29 | Rohr Industries, Inc. | Thrust reverser-cascade two door pre-exit |
FR2936222A1 (fr) * | 2008-09-24 | 2010-03-26 | Aircelle Sa | Nacelle a section de tuyere variable |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2584184A3 (fr) * | 2011-10-17 | 2017-06-14 | Rolls-Royce plc | Tuyère à section variable pour un moteur de turbine à gaz |
Also Published As
Publication number | Publication date |
---|---|
FR2962492B1 (fr) | 2012-08-03 |
BR112013000033A2 (pt) | 2017-07-04 |
RU2013104292A (ru) | 2014-08-20 |
US8769926B2 (en) | 2014-07-08 |
US20130126638A1 (en) | 2013-05-23 |
CN102959223A (zh) | 2013-03-06 |
FR2962492A1 (fr) | 2012-01-13 |
CN102959223B (zh) | 2015-09-16 |
CA2802655A1 (fr) | 2012-01-12 |
EP2591224A1 (fr) | 2013-05-15 |
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