Linked ring petal actuation for variable area fan nozzle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02K-001/12
F01D-017/14
F02K-001/00
F02K-001/15
출원번호
US-0473367
(2012-05-16)
등록번호
US-9091230
(2015-07-28)
발명자
/ 주소
Dittmann, Rainer
McCracken, Reid A.
출원인 / 주소
The Boeing Company
대리인 / 주소
Ostrager Chong Flaherty & Broitman P.C.
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
A variable area fan nozzles comprising an array of rigid petals hinged to a lip area at the downstream end of a thrust reverser sleeve (or half-sleeve). In one embodiment, the actuation system comprises a rotatable ring segment, a drive system for rotating the ring segment, a plurality of cams attac
A variable area fan nozzles comprising an array of rigid petals hinged to a lip area at the downstream end of a thrust reverser sleeve (or half-sleeve). In one embodiment, the actuation system comprises a rotatable ring segment, a drive system for rotating the ring segment, a plurality of cams attached or integrally formed with the ring segment, a plurality of cam followers, and a plurality of petal linkages which operatively couple the petals to the cam followers. This actuation system controls the deflection of the petals, thereby controlling the amount of opening and the rate at which the fan nozzle throat area changes. Each cam may have forward- and rearward-facing camming surfaces that interact with the cam followers to force the petals to pivot outward or inward respectively.
대표청구항▼
1. A variable area fan nozzle comprising: a support member having a shape that is a circle or portion thereof, said support member being centered at an axis;a movable member having a shape corresponding to the shape of said support member, said movable member being supported by and movable along sai
1. A variable area fan nozzle comprising: a support member having a shape that is a circle or portion thereof, said support member being centered at an axis;a movable member having a shape corresponding to the shape of said support member, said movable member being supported by and movable along said support member, movement along said support member being a rotation of said movable member about said axis;a drive system capable of moving said movable member segment along said support member;a cam attached to or integrally formed with said movable member;a cam follower that is displaced along a straight line by said cam during rotational movement of said movable member along said support member;a push rod having a longitudinal axis and one end pivotably coupled to said cam follower for rotation about an axis perpendicular to said longitudinal axis;a petal link having one end pivotably coupled to an opposite end of said push rod; anda petal pivotably coupled to said support member and to an opposite end of said petal link. 2. The variable area fan nozzle as recited in claim 1, wherein when said movable member moves along said support member in one direction, said petal pivots inward, and when said movable member moves along said support member in an opposite direction, said petal pivots outward. 3. The variable area fan nozzle as recited in claim 1, wherein said cam comprises a slot, and said cam follower comprises a bearing rotatably mounted to said one end of said push rod, said bearing being disposed in said slot of said cam. 4. The variable area fan nozzle as recited in claim 1, wherein said cam comprises a slot, and said cam follower comprises a sliding block pivotably mounted to said one end of said push rod, said sliding block being disposed in said slot of said cam. 5. The variable area fan nozzle as recited in claim 1, wherein said cam comprises forward- and rearward-facing camming surfaces, and said cam follower comprises a first bearing in contact with said forward-facing camming surface and a second bearing in contact with said rearward-facing camming surface, said first and second bearings being rotatably mounted to said push rod. 6. The variable area fan nozzle as recited in claim 1, wherein said cam comprises forward- and rearward-facing camming surfaces, and said cam follower comprises a first sliding block in contact with said forward-facing camming surface and a second sliding block in contact with said rearward-facing camming surface, wherein said first and second sliding blocks are pivotably mounted to said push rod. 7. The variable area fan nozzle as recited in claim 1, wherein said petal link comprises a threaded body for adjusting the length of said pivot link. 8. The variable area fan nozzle as recited in claim 1, further comprising a push rod fitting attached to said support member, said push rod fitting comprising a guide having an axis, and said push rod comprising a portion which is disposed in said guide, wherein said guide restrains said push rod when said push rod moves along the guide axis. 9. A variable area fan nozzle comprising left and right fan nozzle assemblies, each of said left and right fan nozzle assemblies comprising: a support member having a shape that is a circle or portion thereof, said support member being centered at an axis;a movable member having a shape corresponding to the shape of said support member, said movable member being supported by and movable along said support member, movement along said support member being a rotation of said movable member about said axis;a drive system capable of moving said movable member segment along said support member;a plurality of cams attached to or integrally formed with said movable member, said cams being located at respective angular positions along said movable member;a plurality of cam followers that are displaced along respective straight lines by said cams during rotational movement of said movable member along said support member;a plurality of push rods, each push rod having a longitudinal axis and one end pivotably coupled to a respective one of said cam followers for rotation about an axis perpendicular to said longitudinal axis;a plurality of petals pivotably coupled to said support member; anda plurality of petal links, each petal link being pivotably coupled to a respective one of said push rods and to a respective one of said petals; andwherein said petals of said left and right fan nozzle assemblies define a throat area of said variable area fan nozzle. 10. The variable area fan nozzle as recited in claim 9, wherein when said movable members of said left and right fan nozzle assemblies rotate in respective first directions, said throat area decreases, and when said movable members of said left and right fan nozzle assemblies rotate in respective second directions opposite to said respective first directions, said throat area increases. 11. The variable area fan nozzle as recited in claim 9, wherein each of said petal links comprises a threaded body for adjusting the length of said pivot link. 12. The variable area fan nozzle as recited in claim 9, of said left and right fan nozzle assemblies further comprises a plurality of push rod fittings attached to said support member, each push rod fitting comprising a guide having an axis, and each push rod comprising a portion which is disposed in the guide of a respective one of said push rod fittings, wherein each guide restrains a respective push rod when that push rod moves along the guide axis. 13. A variable area fan nozzle comprising: a support member having a shape that is a circle or portion thereof, said support member being centered at an axis;a movable member having a shape corresponding to the shape of said support member, said movable member being supported by and movable along said support member, movement along said support member being a rotation of said movable member about said axis;a drive system capable of moving said movable member segment along said support member;a cam attached to or integrally formed with said movable member and comprising a forward-facing camming surface and a rearward-facing camming surface;a cam follower that is displaced rearward along a straight line by said rearward-facing camming surface during rotational movement of said movable member about said axis in a first direction and is displaced forward along said straight line by said forward-facing camming surface during rotational movement of said movable member about said axis in a second direction opposite to said first direction;a petal pivotably coupled to said support member; anda petal linkage assembly that operatively couples said cam follower to said petal. 14. The variable area fan nozzle as recited in claim 13, wherein when said movable member moves along said support member in one direction, said petal pivots inward, and when said movable member moves along said support member in an opposite direction, said petal pivots outward. 15. The variable area fan nozzle as recited in claim 13, wherein said forward- and rearward-facing camming surfaces comprise opposing surfaces of a slot formed in said cam, and said cam follower comprises a bearing rotatably mounted to said one end of said push rod, said bearing being disposed in said slot of said cam. 16. The variable area fan nozzle as recited in claim 13, wherein said forward- and rearward-facing camming surfaces comprise opposing surfaces of a slot formed in said cam, and said cam follower comprises a sliding block pivotably mounted to said one end of said push rod, said sliding block being disposed in said slot of said cam. 17. The variable area fan nozzle as recited in claim 13, wherein said cam follower comprises a first bearing in contact with said forward-facing camming surface and a second bearing in contact with said rearward-facing camming surface, said first and second bearings being rotatably mounted to said push rod. 18. The variable area fan nozzle as recited in claim 13, wherein said cam follower comprises a first sliding block in contact with said forward-facing camming surface and a second sliding block in contact with said rearward-facing camming surface, wherein said first and second sliding blocks are pivotably mounted to said push rod. 19. An apparatus installed on an aircraft, comprising: a sleeve or duct having a trailing lip area comprising a support member having a shape that is a circle or portion thereof, said support member being centered at an axis;a movable member having a shape corresponding to the shape of said support member, said movable member being supported by and movable along said support member, movement along said support member being a rotation of said movable member about said axis;a drive system capable of moving said movable member segment along said support member;a plurality of cams attached to or integrally formed with said movable member, said cams being located at respective angular positions along said movable member, each of said cams comprising a forward-facing camming surface and a rearward-facing camming surface;a plurality of cam followers that are displaced along respective straight lines by said cams during rotational movement of said movable member along said support member, wherein each of said cam followers is displaced rearward along a straight line by the rearward-facing camming surface of a respective cam during rotational movement of said movable member about said axis in a first direction, and each of said cam followers is further displaced forward along said straight line by the forward-facing camming surface of said respective cam during rotational movement of said movable member about said axis in a second direction opposite to said first direction;a plurality of petals pivotably coupled to said support member; anda plurality of petal linkage assemblies, wherein each petal linkage assembly operatively couples a respective one of said cam followers to a respective one of said petals. 20. The apparatus as recited in claim 19, wherein each of said petal linkage assemblies comprises: a push rod coupled to a respective one of said cam followers; anda petal link pivotably coupled to a respective one of said push rods and to a respective one of said petals.
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이 특허에 인용된 특허 (8)
Gutierrez ; Jr. Jose L., Enclosed pressure balanced sync ring nozzle.
Fran.cedilla.ois Abbe FR; Pierre Camy FR; Georges Habarou FR; Michel Thual FR, System for activating an adjustable tube by means of an elastic ring for a thrust nozzle.
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