Thrust reverser and variable area fan nozzle actuation system and method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02K-003/02
F02K-001/76
F02K-001/06
F02K-001/08
F02K-001/09
F02K-001/54
F02K-001/16
F15B-015/08
F15B-015/26
F02K-001/64
출원번호
US-0960442
(2010-12-03)
등록번호
US-8978356
(2015-03-17)
발명자
/ 주소
Burgess, Michael John
출원인 / 주소
The Boeing Company
인용정보
피인용 횟수 :
2인용 특허 :
7
초록▼
There is provided an actuation system for a gas turbine engine including a thrust reverser and a variable area fan nozzle. The system has a plurality of linear actuators each having a first outer piston concentric with a second inner piston. The first outer piston is operatively connected to a thrus
There is provided an actuation system for a gas turbine engine including a thrust reverser and a variable area fan nozzle. The system has a plurality of linear actuators each having a first outer piston concentric with a second inner piston. The first outer piston is operatively connected to a thrust reverser. The second inner piston is operatively connected to a variable area fan nozzle. The system further has a piston lock assembly for selectively locking the first outer piston to the second inner piston. The system further has a control system coupled to the plurality of linear actuators for operating the variable area fan nozzle between a stowed position and a deployed position.
대표청구항▼
1. An actuation system for a gas turbine engine including a thrust reverser and a variable area fan nozzle, the system comprising: a plurality of linear actuators, each linear actuator comprising a first outer piston concentric with a second inner piston, wherein the first outer piston is operativel
1. An actuation system for a gas turbine engine including a thrust reverser and a variable area fan nozzle, the system comprising: a plurality of linear actuators, each linear actuator comprising a first outer piston concentric with a second inner piston, wherein the first outer piston is operatively connected to a thrust reverser and the second inner piston is operatively connected to a variable area fan nozzle;a piston lock assembly for selectively locking the first outer piston to the second inner piston, the piston lock assembly comprising a solenoid coupled to an extendable and retractable pin, the extendable and retractable pin configured for insertion into two corresponding first outer piston slots formed in opposite sides and at a same axial location on the first outer piston, and configured for insertion into one of two corresponding second inner piston slots formed at different axial locations along the second inner piston, the second inner piston slots being configured to allow the variable area fan nozzle to be locked in a stowed position or a deployed position, respectively, and being further configured to allow the extendable and retractable pin to be moved into and out of the first outer piston slots and one of the two second inner piston slots with an axial movement of the first outer piston and the second inner piston; and,a control system coupled to the plurality of linear actuators for operating the variable area fan nozzle between the stowed position and the deployed position. 2. The system of claim 1, wherein the solenoid is coupled to a pair of extendable and retractable pins, and wherein the pins are designed for insertion into the corresponding slots formed in the first outer piston and the second inner piston. 3. The system of claim 1, wherein the control system comprises a power source, a supply line, a motor element, a drive shaft, a gear box, a first hydraulic line, a flex shaft, and a second hydraulic line. 4. The system of claim 1, wherein the control system is capable of actuating the second inner piston independently of the first outer piston. 5. The system of claim 1, wherein the control system is capable of actuating the first outer piston between a thrust reverser stowed position and a thrust reverser deployed position while the piston lock assembly is engaged. 6. The system of claim 1, wherein each linear actuator further comprises a synchronization assembly driven by the control system for synchronizing the first outer piston and for actuating and synchronizing the second inner piston, the synchronization assembly comprising a flex shaft, a worm shaft gear, a worm wheel gear, and a lead screw. 7. The system of claim 6, wherein when the first outer piston and the second inner piston are locked together, they are actuated together by common rotation of the synchronization assembly. 8. The system of claim 1, wherein each linear actuator further comprises a hydraulic assist assembly comprising a flow passage formed through the first outer piston, one or more stop elements formed along an actuator housing interior, and one or more seal elements inserted between the first outer piston and the second inner piston. 9. The system of claim 1, wherein a single actuation system is common to both the thrust reverser and the variable area fan nozzle. 10. The system of claim 1, wherein the system enables the variable area fan nozzle to move between the stowed position and the deployed position, which results in an aerodynamic change to the variable area fan nozzle, and in turn, a reduction of environmental engine noise levels. 11. The system of claim 1, wherein the system further comprises an accumulator assembly for storing and supplying hydraulic fluid to the second inner piston. 12. The system of claim 1, wherein when the control system is powered, the piston lock assembly is locked and only the second inner piston is actuated. 13. An actuation system for an aircraft having a jet engine including a thrust reverser and a variable area fan nozzle, the system comprising: a plurality of linear actuators, each linear actuator comprising:an actuator housing;a first outer piston concentric with a second inner piston, wherein the first outer piston is operatively connected to a thrust reverser and the second inner piston is operatively connected to a variable area fan nozzle, the first outer piston and the second inner piston being substantially positioned within the actuator housing;a synchronization assembly positioned within the actuator housing for synchronizing the first outer piston and for actuating and synchronizing the second inner piston, the synchronization assembly comprising a flex shaft, a worm wheel gear, a worm shaft gear, and a lead screw;a piston lock assembly for selectively locking the first outer piston to the second inner piston, the piston lock assembly comprising a solenoid coupled to an extendable and retractable pin, the extendable and retractable pin configured for insertion into two corresponding first outer piston slots formed in opposite sides and at a same axial location on the first outer piston, and configured for insertion into one of two corresponding second inner piston slots formed at different axial locations along the second inner piston, the second inner piston slots being configured to allow the variable area fan nozzle to be locked in a stowed position or a deployed position, respectively, and being further configured to allow the extendable and retractable pin to be moved into and out of the first outer piston slots and one of the two second inner piston slots with an axial movement of the first outer piston and the second inner piston;at least one hydraulic line coupled to the plurality of linear actuators; and,a control system coupled to the plurality of linear actuators, the control system capable of actuating the second inner piston independently of the first outer piston and thus operating the variable area fan nozzle between a the stowed position and a the deployed position, and the control system further capable of actuating the first outer piston between a thrust reverser stowed position and a thrust reverser deployed position, while the piston lock assembly is engaged. 14. The system of claim 13, wherein the solenoid is coupled to a pair of extendable and retractable pins, and wherein the pins are designed for insertion into the corresponding slots formed in the first outer piston and the second inner piston. 15. The system of claim 13, wherein a single actuation system is common to both the thrust reverser and the variable area fan nozzle. 16. The system of claim 13, wherein each linear actuator further comprises a hydraulic assist assembly comprising a flow passage formed through the first outer piston, one or more stop elements formed along an actuator housing interior, and one or more seal elements inserted between the first outer piston and the second inner piston. 17. The system of claim 13, wherein the system enables the variable area fan nozzle to move between the stowed position and the deployed position, which results in an aerodynamic change to the variable area fan nozzle, and in turn, a reduction of environmental jet engine noise levels. 18. A method for actuating in a single actuation system a thrust reverser and a variable area fan nozzle in an aircraft jet engine, the method comprising: providing a combined thrust reverser and variable area fan nozzle actuation system comprising:a plurality of linear actuators, each linear actuator comprising a first outer piston concentric with a second inner piston, wherein the first outer piston is operatively connected to a thrust reverser and the second inner piston is operatively connected to a variable area fan nozzle;a piston lock assembly for selectively locking the first outer piston to the second inner piston, the piston lock assembly comprising a solenoid coupled to an extendable and retractable pin, the extendable and retractable pin configured for insertion into two corresponding first outer piston slots formed in opposite sides and at a same axial location on the first outer piston, and configured for insertion into one of two corresponding second inner piston slots formed at different axial locations along the second inner piston, the second inner piston slots being configured to allow the variable area fan nozzle to be locked in a stowed position or a deployed position, respectively, and being further configured to allow the extendable and retractable pin to be moved into and out of the first outer piston slots and one of the two second inner piston slots with an axial movement of the first outer piston and the second inner piston; anda control system coupled to the plurality of linear actuators;unlocking the piston lock assembly when the first outer piston and the second inner piston are in the stowed position;using the control system to actuate the second inner piston and the variable area fan nozzle independently of the first outer piston and the thrust reverser, so that the second inner piston and the variable area fan nozzle are actuated to a first deployed position;locking the piston lock assembly when the second inner piston and the variable area fan nozzle are in the first deployed position; and,using the control system to actuate the first outer piston and the thrust reverser, so that the first outer piston and the thrust reverser are actuated to a second deployed position, while the piston lock assembly is locked. 19. The method of claim 18 further comprising providing a hydraulic assist assembly to the combined thrust reverser and variable area fan nozzle actuation system, wherein the hydraulic assist assembly assists with hydraulic force and facilitates actuation of the first outer piston and the thrust reverser. 20. The method of claim 18 further comprising providing an accumulator assembly for storing and supplying hydraulic fluid to the second inner piston. 21. The method of claim 18, wherein the method enables the variable area fan nozzle to move between the stowed position and the deployed position, which results in an aerodynamic change to the variable area fan nozzle, and in turn, a reduction of environmental jet engine noise levels.
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이 특허에 인용된 특허 (7)
Berneuil Yves R. J. (Paris FRX) Bettremieux Christian W. B. (Le Mee sur Seine FRX) Kettler Daniel G. A. (Chartrettes FRX) Lechevalier Michel M. A. A. (Mormant FRX) Pasquali Xavier J. (Le Mee sur Sein, Actuating system for a variable area exhaust nozzle.
Duesler Paul W. ; Loffredo Constantino V. ; Prosser ; Jr. Harold T. ; Jones Christopher W., Variable area fan exhaust nozzle having mechanically separate sleeve and thrust reverser actuation systems.
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