EP2398707A1 - Procédé de fermeture d'un élément mobile de nacelle - Google Patents
Procédé de fermeture d'un élément mobile de nacelleInfo
- Publication number
- EP2398707A1 EP2398707A1 EP10707075A EP10707075A EP2398707A1 EP 2398707 A1 EP2398707 A1 EP 2398707A1 EP 10707075 A EP10707075 A EP 10707075A EP 10707075 A EP10707075 A EP 10707075A EP 2398707 A1 EP2398707 A1 EP 2398707A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closing
- movable
- cover
- cylinder
- stroke
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012423 maintenance Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 201000010065 polycystic ovary syndrome Diseases 0.000 description 1
Classifications
-
- 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
- B64D29/06—Attaching of nacelles, fairings or cowlings
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0536—Highspeed fluid intake means [e.g., jet engine intake]
Definitions
- the present invention relates to a device for closing a movable cowl of a turbojet engine nacelle, and to a nacelle equipped with such a closure device.
- an aircraft engine nacelle comprises at least one movable cowl between a service position, in which this cowling covers an element or part of the nacelle and / or the turbojet, and a maintenance position. , in which the hood is spaced from the nacelle and discovers said element or said part thus allowing the intervention of a technician inside the nacelle or on the turbojet engine, in particular for maintenance operations.
- such covers are known that are arranged at a central section of the nacelle surrounding a fan of the turbojet and generally open as a butterfly.
- “Motorized Hood Actuation System” generally include at least one hydraulic or electric actuator, operable to open or close the hood.
- such a jack comprises, at its end cooperating with the hood, a dead race device ("Free Play” in English, which means “free play”), allowing a small additional excursion of the end of this cylinder for a given extension of the cylinder.
- This dead stroke is on the one hand to avoid transmitting compression / traction forces to the cylinder in flight situation, when the cover undergoes deformations related to particular pressure profiles, and on the other hand to allow an easy manual closing of the cover at the end of the maintenance operations, in spite of the friction caused by the tolerances of the different parts cooperating with each other.
- a cons-plug or stand is also generally provided so as to block the hood in the open position and to relieve the cylinder of the weight of this hood.
- This counterplate is manually placed by the technician, and withdrawn by him just before closing the hood.
- the jack is aided by the weight of the movable cowl.
- this aid for closing by the weight of the cowl does not exist.
- a closing phase of a moving cowl comprises two phases, namely, a closing phase of the cowl and a final phase of locking the cowl by associated locking means.
- the cylinder or cylinders must be dimensioned to be able to provide the final maximum power while this power is needed on a small portion of the stroke of or cylinders.
- the present invention is intended in particular to remedy these drawbacks and consists in doing so in a method of closing a movable element actuated by at least one jack type actuator equipped with a final dead stroke device, said cap being also associated with at least one locking means, the closing method comprising the following steps aimed at: - With the aid of the jack, driving the movable hood closing on a part of its stroke until reaching a zone close to closing forces, the distance remaining to be traveled is less than the available dead stroke of the cylinder.
- the cylinder can be sized for the few hundreds of daN needed to move the cover over most of its travel, the 800 daN required for final closure being provided by the means of locking.
- the locking means must generally perform a pre-charge phase requiring about 400daN per latch and are sized to be able to provide this effort.
- a mobile nacelle cover typically comprising four bolts, so there are 1600 daN that are available by the locks. It therefore appeared that the locks were able to provide the necessary efforts to the final phase of closing the hood. By using the locks to also achieve this final phase, it is no longer necessary to oversize the cylinder.
- the method comprises an additional step of locking the cover by the locks.
- the movable element is movable in translation.
- the movable element is a hood of a turbojet engine nacelle.
- the movable cowl is a maintenance cowl of an air intake structure of the nacelle.
- the actuator is an electromechanical actuator.
- the present invention also relates to a turbojet engine nacelle comprising at least one movable cowl equipped with at least one actuator comprising a dead travel device and associated with at least one locking means of said cowl, characterized in that the locking means is able to drive the movable hood closing on a final part of its closing stroke in accordance with a method according to the invention.
- FIG. 5 to 8 show the steps of a second embodiment of a method according to the invention for closing a movable nacelle cover with resistant external forces.
- a turbojet engine nacelle (not shown) constitutes a tubular housing for a turbojet engine which serves to channel the air flows that it generates by defining internal and external aerodynamic lines necessary for obtaining optimum performance.
- turbojet It also houses various components necessary for the operation of the turbojet as well as ancillary systems such as a thrust reverser.
- a nacelle has a structure comprising a front section forming an air inlet, a central section surrounding a fan and a rear section surrounding the turbojet engine and capable of housing a thrust reversal system.
- the structure of the nacelle also includes one or more mobile hood for maintenance operations and allowing access to the interior of the nacelle.
- the front section may be equipped with at least one such movable cover 1 formed from an outer panel and incorporating an air inlet lip, said cover 1 being mounted to move in translation in a substantially longitudinal direction of Platform.
- the mobile cowl 1 can be driven in translation by one or more cylinders 2, preferably electromechanical, between a closed position in which the continuity of the aerodynamic lines is ensured and an open position in which it allows access to the interior.
- the air intake section of the nacelle is associated with locking means (not visible) capable of ensuring its maintenance in the closed position and its junction with the middle section.
- the cylinders 2 are equipped with dead-movement devices 4 forming a freely translatable part relative to the jack 2.
- This dead-movement device 4 can be associated with an elastic return means 5 the now in position of retractation relative to the body of the cylinder 2.
- the default position of retraction or extension of the device depends on the mounting direction of the cylinder 2 and the direction of translation of the cover 1 and the retraction mode is here given as 'example.
- Figures 1 to 4 show a first alternative embodiment of the closure method according to the invention in the case where the movable cover 1 is subjected to assisting efforts (wind for example).
- the movable cover 1 is first ( Figure 1) closed with the cylinders 2 about 98% of its closing stroke.
- the assisting forces push back the dead-movement device 4 in the retracted position with respect to the body of the jack 2.
- the hood arrives (FIG. 2) then in a recentering and compression zone of the gasket 6 in which the forces necessary for its closing are greater than those which can develop the cylinder 2.
- the cylinder ends (FIG. 3) alone. its retraction on the remaining 2% while the stroke device 4 extends relative to the cylinder.
- the cylinder is indeed capable of compressing the elastic return means 5 but unable to overcome the efforts of refocusing and compression.
- the hood 1 remains immobile. Of course, in the case of a hood 1 without seal 6, the only cylinders will be sufficient.
- Figures 5 to 8 show a second alternative embodiment of the closure method according to the invention in the case where the movable cover 1 is subjected to resistant forces (friction for example).
- the movable cowl 1 is firstly (FIG. 5) closed with the help of the jacks 2 on approximately 98% of its closing stroke as before.
- the resistant forces cause the dead-movement device 4 to be in extended position relative to the body of the jack 2, the latter compressing the spring 5.
- the hood arrives (FIG. 6) then in the automatic closing zone of the hood in which the hood no longer sees the resistive forces due to the wind for example, and therefore sticks to the joints 6 in which the forces necessary for its closure are greater to those that can develop the cylinder 2.
- the jack ends (FIG. 7) only its retraction on the remaining 2% and the dead-movement device 4 remains in extension relative to the jack 2.
- the end of closure ( Figure 8) is performed using the locking means.
- the dead stroke device therefore returns to an at least partially retracted position.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Superstructure Of Vehicle (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Wind Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0900777A FR2942492B1 (fr) | 2009-02-20 | 2009-02-20 | Procede de fermeture d'un element mobile de nacelle |
| PCT/FR2010/000091 WO2010094850A1 (fr) | 2009-02-20 | 2010-02-08 | Procédé de fermeture d'un élément mobile de nacelle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2398707A1 true EP2398707A1 (fr) | 2011-12-28 |
Family
ID=41119311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10707075A Withdrawn EP2398707A1 (fr) | 2009-02-20 | 2010-02-08 | Procédé de fermeture d'un élément mobile de nacelle |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110303298A1 (fr) |
| EP (1) | EP2398707A1 (fr) |
| CN (1) | CN102317161A (fr) |
| BR (1) | BRPI1008505A2 (fr) |
| CA (1) | CA2748726A1 (fr) |
| FR (1) | FR2942492B1 (fr) |
| RU (1) | RU2521110C2 (fr) |
| WO (1) | WO2010094850A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3012794B1 (fr) * | 2013-11-05 | 2017-03-24 | Aircelle Sa | Liaison entre un actionneur et un inverseur de poussee d'une nacelle de turboreacteur, comportant des jeux |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB531750A (en) * | 1939-03-31 | 1941-01-10 | Aircraft Components Ltd | Improvements relating to retractable undercarriages for aircraft |
| US3583288A (en) * | 1969-09-29 | 1971-06-08 | Western Hydraulics Inc | Combined hydraulic and control manual operator |
| US4318557A (en) * | 1979-10-09 | 1982-03-09 | Hartwell Corporation | Latching mechanism |
| FR2731049B1 (fr) * | 1995-02-28 | 1997-05-09 | Aerospatiale | Dispositif de fixation d'une bouche d'entree d'air sur un reacteur et reacteur comportant un tel dispositif |
| FR2771710B1 (fr) * | 1997-12-03 | 2000-02-11 | Aerospatiale | Dispositif d'ouverture commun a deux capots adjacents de nacelle de moteur d'avion |
| FR2772342B1 (fr) * | 1997-12-16 | 2000-02-18 | Aerospatiale | Ensemble propulseur a capots de soufflante munis de securites de maintien et de positionnement, pour aeronef |
| EP1029145A1 (fr) * | 1998-08-05 | 2000-08-23 | Reglomat AG | Procede et dispositif pour l'actionnement d'au moins une partie mobile |
| US6340135B1 (en) * | 2000-05-30 | 2002-01-22 | Rohr, Inc. | Translating independently mounted air inlet system for aircraft turbofan jet engine |
| RU2272755C1 (ru) * | 2004-09-02 | 2006-03-27 | Открытое акционерное общество Таганрогский авиационный научно-технический комплекс им. Г.М. Бериева | Стяжной капотный замок |
| FR2882087B1 (fr) * | 2005-02-11 | 2007-04-20 | Heuliez Sa | Vehicule possedant un ouvrant dont les mouvements sont securises par un organe a course morte |
| FR2920208B1 (fr) * | 2007-08-20 | 2012-10-12 | Aircelle Sa | Verin d'ouverture de capot de nacelle de moteur d'aeronef |
-
2009
- 2009-02-20 FR FR0900777A patent/FR2942492B1/fr not_active Expired - Fee Related
-
2010
- 2010-02-08 EP EP10707075A patent/EP2398707A1/fr not_active Withdrawn
- 2010-02-08 CN CN201080007401XA patent/CN102317161A/zh active Pending
- 2010-02-08 US US13/202,695 patent/US20110303298A1/en not_active Abandoned
- 2010-02-08 WO PCT/FR2010/000091 patent/WO2010094850A1/fr not_active Ceased
- 2010-02-08 RU RU2011137839/11A patent/RU2521110C2/ru not_active IP Right Cessation
- 2010-02-08 CA CA2748726A patent/CA2748726A1/fr not_active Abandoned
- 2010-02-08 BR BRPI1008505A patent/BRPI1008505A2/pt not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010094850A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2942492A1 (fr) | 2010-08-27 |
| CA2748726A1 (fr) | 2010-08-26 |
| WO2010094850A1 (fr) | 2010-08-26 |
| BRPI1008505A2 (pt) | 2016-03-08 |
| RU2521110C2 (ru) | 2014-06-27 |
| US20110303298A1 (en) | 2011-12-15 |
| FR2942492B1 (fr) | 2011-03-04 |
| CN102317161A (zh) | 2012-01-11 |
| RU2011137839A (ru) | 2013-03-27 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| 17Q | First examination report despatched |
Effective date: 20130507 |
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| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| RIC1 | Information provided on ipc code assigned before grant |
Ipc: B64D 29/08 20060101ALI20140919BHEP Ipc: B64D 29/06 20060101AFI20140919BHEP Ipc: E05F 15/12 20060101ALI20140919BHEP |
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| INTG | Intention to grant announced |
Effective date: 20141010 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20150221 |