# US 11,111,880 B2 · Nacelle of a turbojet engine comprising a thrust-reversing door

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- Number: US 11,111,880 B2
- Document ID: US11111880B2
- Status: Granted
- Kind: B2
- Application number: 16/277,329
- Filed: 2019-02-15
- Published: 2019-08-22
- Granted: 2021-09-07
- Earliest claimed: 2018-02-22
- Assignees: Airbus Operations GmbH
- Applicants: Airbus Operations SAS
- Inventors: Thomas Sauvalle
- Web page: https://patentgrep.com/patent/US11111880B2

## CPC

- F02K 1/70: using thrust reverser flaps or doors mounted on the fan housing
- B64D 29/06: Attaching of nacelles, fairings or cowlings
- F02K 1/72: the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow
- F02K 1/763: {with actuating systems or actuating devices; Arrangement of actuators for thrust reversers}
- F02K 3/06: with front fan
- F05D 2240/14: Casings or housings protecting or supporting assemblies within
- F05D 2260/50: Kinematic linkage, i.e. transmission of position
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A nacelle comprising a fixed structure, a fixed cowl, a mobile cowl, and a motor arrangement to translationally displace the mobile cowl from a closed to an open position on the fixed structure. The nacelle comprises a window delimited between the fixed and mobile cowls and open between a secondary turbojet and the outside, a thrust-reversing door rotationally mobile about a rotational axis between retracted and active positions, and a driving mechanism which coordinates and defers the switch from the retracted to the active position with the switch from the closed to the open position. The driving mechanism comprises two connecting rods rotationally mobilely mounted on the fixed structure and bearing a wheel, a mobile cowl groove which slidingly receives the wheel, a guide integral to the thrust-reversing door, and a runner rotationally mobilely mounted between the connecting rods, as well as mounted to slide along the guide.

## Claims

### Claim 1

A nacelle for a dual flow turbojet engine, in which two streams of air flow through said nacelle in a direction from a front to a rear of said nacelle, said nacelle comprising:
a fixed structure,
a fixed cowl fixedly mounted on the fixed structure and a mobile cowl that is translationally mobile relative to the fixed structure in a direction of translation to switch between a position of closure in which the mobile cowl is close to the fixed cowl and a position of opening in which the mobile cowl is spaced away from the fixed cowl to the rear,
a motor arrangement configured to displace the mobile cowl from the position of closure to the position of opening and vice versa,
a window delimited upstream by the fixed cowl and downstream by the mobile cowl, said window being open between a turbojet of a secondary flow and an outside of the nacelle,
a thrust-reversing door mounted in a rotationally mobile manner to rotate about an axis of rotation and thereby switch between a retracted position in which the thrust-reversing door is positioned inside the mobile cowl and an active position in which the thrust-reversing door comes across the turbojet, and
a driving mechanism provided to coordinate and defer the switch from the retracted position to the active position of the thrust-reversing door with the switch from the position of closure to the position of opening of the mobile cowl and vice versa, said driving mechanism comprising:
two connecting rods, wherein each of the connecting rods comprises a proximal end roationally mobilely mounted on the fixed structure about a connecting rod axis parallel to the axis of rotation and a distal end bearing a wheel rotationally mobilely mounted about a wheel axis parallel to the axis of rotation,
wherein for each of the wheels, a groove is integral to the mobile cowl and comprising a rectilinear part and an arched part, the rectilinear part being parallel to the direction of translation and extending behind the arched part, wherein the wheel slides in said groove,
a guide integral to the thrust-reversing door, and
a runner being rotationally mobilely mounted between the two connecting rods about a runner axis parallel to the axis of rotation, and also slidingly mounted relative to the guide.

### Claim 2 (depends on 1)

The nacelle according to claim 1, wherein the arched part has a curvature which starts from the rectilinear part towards the an interior of the nacelle, advancing from the rear to the front.

### Claim 3 (depends on 1)

The nacelle according to claim 1, wherein each of the connecting rods has an L shape and wherein the runner axis is arranged at a corner of the L shape.

### Claim 4 (depends on 1)

The nacelle according to claim 1, wherein the guide is a rod and wherein the runner comprises a bore in which the rod is fitted.

### Claim 5 (depends on 1)

A dual flow turbojet engine comprising an engine and a nacelle according to claim 1 surrounding the engine, and wherein the turbojet of the secondary flow is delimited between the nacelle and the engine.

### Claim 6 (depends on 5)

An aircraft comprising at least one dual flow turbojet engine according to claim 5.