AIRCRAFT THRUST REVERSER SYSTEM WITH ALTERNATE REVERSE THRUST LOAD PATH

• US 20180209376A1
• Filed: 12/20/2016
• Published: 07/26/2018
• Est. Priority Date: 08/24/2016
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Chakkera, Kevin K., Birchak, Daniel C., Christensen, Donald Jeffrey, Wawrzynek, James
• Granted Patent: US 10,443,541 B2
• Time in Patent Office: Days
• CPC Class Codes: F02K 1/625 the aft end of the engine cowling being movable to uncover openings for the reversed flow
• CPC Class Codes: F02K 1/72 the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow
• CPC Class Codes: F02K 1/763 with actuating systems or actuating devices; Arrangement of actuators for thrust reversers
• CPC Class Codes: F05D 2250/34 translated
• CPC Class Codes: F05D 2260/50 Kinematic linkage, i.e. transmission of position
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A thrust reverser system for a gas turbine engine includes a support structure, a transcowl, and an actuator. The transcowl is mounted on the support structure and is axially translatable between a stowed position and a deployed position. The actuator is coupled to the transcowl and the support structure, and is configured to supply an actuation force to the transcowl to thereby move the transcowl between the stowed and deployed positions. The actuator includes an actuator housing, a screw, a nut, a rod end, and a tension rod. The tension rod is engaged by the nut when the transcowl is in the deployed position and is engaged by the rod end when the transcowl is in the stowed position, whereby actuator loads, in both the deployed and stowed positions, are transmitted through the tension rod to the support structure.

Claims

1. A thrust reverser system for a gas turbine engine, comprising:

a support structure configured to be mounted to the turbine engine;

a transcowl mounted on the support structure and axially translatable, relative to the support structure, between a stowed position and a deployed position; and

an actuator coupled to the transcowl and the support structure, the actuator configured to supply an actuation force to the transcowl to thereby move the transcowl between the stowed and deployed positions, the actuator comprising;

an actuator housing;

a screw rotationally mounted at least partially within the actuator housing, the screw coupled to receive a drive torque and configured, upon receipt of the drive torque, to rotate;

a nut having an opening through which the screw extends and configured, upon rotation of the screw, to translate between a fully retracted position and a fully extended position, to thereby move the transcowl between the stowed and deployed positions, respectively;

a rod end coupled to, and spaced apart from, the nut, the rod end configured to translate with the nut; and

a tension rod coupled to the support structure and extending through the actuator housing and the screw, the tension rod engaged by the nut when the transcowl is in the deployed position and engaged by the rod end when the transcowl is in the stowed position, whereby actuator loads, in both the deployed and stowed positions, are transmitted through the tension rod to the support structure.

2. The system of claim 1, wherein:

the tension rod has a length; and

the length of the tension rod that extends from the support structure and through the actuator housing and screw is adjustable.

3. The system of claim 1, further comprising a spherical rod end assembly coupled to the support structure and the tension rod.

4. The system of claim 1, wherein the actuator further comprises a gear, the gear rotationally mounted in the actuator housing and coupled to the screw, the gear configured to receive and transfer the drive torque to the screw.

5. The system of claim 1, wherein the actuator further comprises an extension tube, the extension tube coupled between the nut and the rod end.

6. The system of claim 5, wherein:

the actuator loads are transmitted via an actuator load path;

in the deployed position, the actuator load path is through the extension tube, to the nut, to the tension rod, and to the support structure; and

in the stowed position, the actuator load path is from the rod end, to the tension rod, and to the support structure.

7. A thrust reverser system for a gas turbine engine, comprising:

a support structure configured to be mounted to the turbine engine;

a transcowl mounted on the support structure and axially translatable, relative to the support structure, between a stowed position and a deployed position; and

an actuator coupled to the transcowl and the support structure, the actuator configured to supply an actuation force to the transcowl to thereby move the transcowl between the stowed and deployed positions, the actuator comprising;

an actuator housing;

a screw rotationally mounted at least partially within the actuator housing, the screw coupled to receive a drive torque and configured, upon receipt of the drive torque, to rotate;

a nut having an opening through which the screw extends and configured, upon rotation of the screw, to translate between a fully retracted position and a fully extended position, to thereby move the transcowl between the stowed and deployed positions, respectively;

a rod end coupled to, and spaced apart from, the nut, the rod end configured to translate with the nut;

an extension tube coupled between the nut and the rod end; and

a tension rod coupled to the support structure and extending through the actuator housing and the screw, the tension rod having a length and engaged by the nut when the transcowl is in the deployed position and engaged by the rod end when the transcowl is in the stowed position, whereby actuator loads, in both the deployed and stowed positions, are transmitted through the tension rod to the support structure,

wherein the length of the tension rod that extends from the support structure and through the actuator housing and screw is adjustable.

8. The system of claim 7, further comprising a spherical rod end assembly coupled to the support structure and the tension rod.

9. The system of claim 7, wherein the actuator further comprises a gear, the gear rotationally mounted in the actuator housing and coupled to the screw, the gear configured to receive and transfer the drive torque to the screw.

10. The system of claim 7, wherein the actuator further comprises an extension tube, the extension tube coupled between the nut and the rod end.

11. The system of claim 7, wherein:

the actuator loads are transmitted via an actuator load path;

in the deployed position, the actuator load path is through the extension tube, to the nut, to the tension rod, and to the support structure; and

in the stowed position, the actuator load path is from the rod end, to the tension rod, and to the support structure.

12. A thrust reverser system for a gas turbine engine, comprising:

a support structure configured to be mounted to the turbine engine; and

an actuator coupled to the support structure, the actuator adapted to receive a drive torque and configured, upon receipt thereof, to move between a fully retracted position and a fully extended position, the actuator comprising;

an actuator housing;

a screw rotationally mounted at least partially within the actuator housing, the screw coupled to receive the drive torque and configured, upon receipt of the drive torque, to rotate;

a nut having an opening through which the screw extends and configured, upon rotation of the screw, to translate between the fully retracted and fully extended positions;

a rod end coupled to, and spaced apart from, the nut, the rod end configured to translate with the nut; and

a tension rod coupled to the support structure and extending through the actuator housing and the screw, the tension rod engaged by the nut when the actuator is in the fully extended position and engaged by the rod end when the actuator is in the fully retracted position, whereby actuator loads, in both the fully retracted and fully extended positions, are transmitted through the tension rod to the support structure.

13. The system of claim 12, wherein:

the tension rod has a length; and

the length of the tension rod that extends from the support structure and through the actuator housing and screw is adjustable.

14. The system of claim 12, further comprising a spherical rod end assembly coupled to the support structure and the tension rod.

15. The system of claim 12, wherein the actuator further comprises a gear, the gear rotationally mounted in the actuator housing and coupled to the screw, the gear configured to receive and transfer the drive torque to the screw.

16. The system of claim 12, wherein the actuator further comprises an extension tube, the extension tube coupled between the nut and the rod end.

17. The system of claim 16, wherein:

the actuator loads are transmitted via an actuator load path;

in the fully extended position, the actuator load path is through the extension tube, to the nut, to the tension rod, and to the support structure; and

in the fully retracted position, the actuator load path is from the rod end, to the tension rod, and to the support structure.