Stator vane stage actuated by an automatically-centering rotary actuator ring
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04D-029/56
F04D-029/40
출원번호
US-0296298
(2005-12-08)
등록번호
US-7300245
(2007-11-27)
우선권정보
FR-0413387(2004-12-16)
발명자
/ 주소
Bouru,Michel Andre
출원인 / 주소
Snecma
대리인 / 주소
Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
인용정보
피인용 횟수 :
3인용 특허 :
6
초록▼
A variable pitch stator vane stage, said vanes being moved by an automatically-centered rotary actuator ring. The casing carries a stationary coaxial annular rail projecting from its outside surface, and circumferentially spaced apart moving equipments are provided that are constrained to move along
A variable pitch stator vane stage, said vanes being moved by an automatically-centered rotary actuator ring. The casing carries a stationary coaxial annular rail projecting from its outside surface, and circumferentially spaced apart moving equipments are provided that are constrained to move along said rail, each moving equipment being coupled to the actuator ring via a radial guide arrangement.
대표청구항▼
What is claimed is: 1. A stage of variable pitch stator vanes, comprising vanes arranged in a casing, said vanes being moved by an actuator ring outside said casing and carried by the casing, and said actuator ring being connected via cranks to the vanes of said stage in order to actuate them simul
What is claimed is: 1. A stage of variable pitch stator vanes, comprising vanes arranged in a casing, said vanes being moved by an actuator ring outside said casing and carried by the casing, and said actuator ring being connected via cranks to the vanes of said stage in order to actuate them simultaneously, wherein said casing has a stationary coaxial annular rail projecting from its outside surface, wherein at least three circumferentially-spaced moving equipments are constrained to move along said rail, and wherein each moving equipment is coupled to said rail by a radial guide arrangement. 2. A vane stage according to claim 1, wherein said rail is made up of two parallel track rings secured to said casing, and wherein the moving equipments are shaped to move between these two track rings. 3. A vane stage according to claim 2, wherein the two track rings are provided with facing lateral rims and wherein the moving equipments include V-groove wheels engaging with said side rims. 4. A vane stage according to claim 3, wherein each moving equipment includes a support surrounding said actuator ring, and wherein said wheels are mounted to rotate freely on said support. 5. A vane stage according to claim 4, wherein each wheel is mounted on a hub-forming element secured to said support, and extending substantially radially relative to said casing. 6. A vane stage according to claim 5, wherein rolling means are interposed between said hub-forming element and said wheel. 7. A vane stage according to claim 5, wherein said hub-forming element is provided with a portion that is eccentric relative to two end portions whereby it is secured to said support, wherein the wheel is mounted to rotate on said eccentric portion, and wherein the angular position in which said hub-forming element is mounted on said support is adjustable to enable the clearance between said wheel and said rail to be adjusted. 8. A vane stage according to claim 2, wherein the two track rings are provided with facing side grooves, wherein each moving equipment include a base extending between the two track rings, and wherein the edge faces of said base facing said track rings carry rolling elements engaged in said side grooves. 9. A vane stage according to claim 2, wherein the two track rings are provided with facing frustoconical surfaces, wherein each moving equipment includes a base extending between the two track rings, and wherein the bottom face of said base and its edge faces facing said two track rings carry contact pads of anti-friction material, co-operating respectively with the outside surface of the casing, between the two track rings, and with said frustoconical surfaces. 10. A vane stage according to claim 1, wherein said rail is made of a single track ring secured to said casing, wherein each moving equipment has guide elements in lateral contact with said rail, on either side thereof. 11. A vane stage according to claim 10, wherein said track ring includes two opposite annular side grooves, each moving equipment having rolling means engaged in said grooves. 12. A vane stage according to claim 1, wherein, for each moving equipment, said radial guide arrangement includes an element engaged radially in a hole in said actuator ring, said element being carried by said moving equipment. 13. A vane stage according to claim 12, wherein said element includes a rod, and wherein said rod is surrounded by an anti-friction bushing or by a tubular rolling cage. 14. A vane stage according to claim 12, wherein, for each moving equipment, said radial guide arrangement includes a radial slot formed in a fraction of the height of said actuator ring, in which a rod is slidably engaged without circumferential clearance, the rod extending parallel to the axis of rotation and being carried by said moving equipment. 15. A vane stage according to claim 14, wherein rolling means are interposed between each said rod and said radial slot. 16. A compressor provided with at least one stator vane stage of variable pitch according to claim 1. 17. A turbomachine including at least one compressor according to claim 16.
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이 특허에 인용된 특허 (6)
Young John Herman (South Windsor CT) Salisbury Charles Edward (Glastonbury CT), High ratio actuation linkage.
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