[특허]Hydraulic blocking rotary actuator

Woodward, Inc.

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Hydraulic blocking rotary actuator

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F15B-015/12 F01D-009/00
미국특허분류(USC)	092/122; 092/125
출원번호	US-0760135 (2013-02-06)
등록번호	US-8915176 (2014-12-23)
발명자 / 주소	Henrickson, Rhett S. O'Hara, Robert P.
출원인 / 주소	Woodward, Inc.
대리인 / 주소	Fish & Richardson P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 6

초록
▼

In one embodiment, a hydraulic blocking rotary actuator including a stator housing having a through bore to position a rotor assembly. A rotor assembly includes an output shaft and at least one rotary piston disposed radially about the output shaft. The rotary piston includes an integral first vane element and an integral second vane element each with peripheral longitudinal faces substantially concentric to the other. A continuous seal groove is disposed in peripheral longitudinal faces and lateral end faces of the rotary pistons. A continuous seal is disposed in the continuous seal groove. The bore through the stator housing includes an interior cavity with surfaces adapted to receive the rotor assembly. With rotation fluid ports blocked the housing cavity is sealed with the continuous piston seal for hydraulic blocking, preventing actuator displacement by external forces. Other embodiments are disclosed.

대표
청구항
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1. A hydraulic blocking actuator comprising: a stator housing having a bore disposed axially therethrough;a first static piston assembly and a second static piston assembly, each static piston assembly having an outer longitudinal peripheral surface adapted to contact an inner wall of a portion of the stator housing, each static piston assembly including: two interior partial cylindrical surfaces, a single radial inwardly disposed vane positioned between the two interior partial cylindrical surfaces, and two radial inwardly disposed half vanes positioned at respective distal ends of the two interior partial cylindrical surfaces, wherein the first static piston assembly and the second static piston assembly are disposed with one of the half vanes of the first static piston assembly adjacent longitudinally to one of the half vanes of the second static piston assembly and the other half vane of the first static piston assembly adjacent longitudinally to the other half vane of the second static piston assembly, and wherein each of the single vane and the half vanes has an inwardly disposed peripheral longitudinal face and a first lateral peripheral face and a second lateral peripheral face;each static piston assembly further includes two continuous seal grooves, each of said seal grooves disposed in a pathway along the peripheral longitudinal face and the first and second peripheral lateral faces of the single vane and the peripheral longitudinal faces and the first and second peripheral lateral faces of one of the half vanes;a continuous seal disposed in each of the two continuous seal grooves; anda rotor adapted to be received in the bore of the housing. 2. The actuator of claim 1 wherein the rotor includes a first end section and a second end section and a middle section disposed between the first end section and the second end section; said first and second end sections being formed about the axis of the rotor and having a diameter adapted to be received in the bore of the housing, said middle section having a first diameter formed about the axis of the rotor with a radial diameter smaller than the diameter of the end sections, said middle section further including a pair of opposing pair of recesses about the axis of the rotor, each opposing recess having a second diameter smaller than the first diameter. 3. The actuator of claim 2 wherein the single radial vane extends an inward perpendicular distance from the two interior partial cylindrical surfaces such that portions of the continuous seals disposed in the continuous seal grooves in the longitudinal face of the single vane will contact the second diameter of the rotor and the half vanes extend an inward perpendicular distance from the two partial cylindrical surfaces such that portions of the continuous seals disposed in the continuous seal grooves in the longitudinal face of the half vanes, will contact with the first diameter of the rotor. 4. The actuator of claim 1 further including first and second end bearing assemblies, each assembly having a shaft bore adapted to receive a respective output shaft portion of the rotor and each of said first and second end bearing assemblies adapted to seal each respective end bore portions of the housing. 5. The actuator of claim 4 wherein a portion of the continuous seals disposed in the continuous seal grooves on the lateral faces of the first static piston assembly and the lateral faces of the second static piston assembly are in sealing contact with interior surfaces of the first and second ends of the rotor. 6. The actuator of claim 3 wherein the single vane of the first static piston assembly and the single vane of the second static piston assembly are disposed opposite each other inside the middle section of the rotor. 7. The actuator of claim 6 wherein two adjacent half vanes are disposed opposite two other adjacent half vanes inside the middle section of the rotor. 8. The actuator of claim 3 wherein the first static piston assembly and the second static piston assembly, with the rotor define four pressure chambers. 9. The actuator of claim 8 wherein opposite pressure chambers have equal surface areas as the rotor rotates within the housing. 10. The actuator of claim 1 wherein the rotor is configured to connect in a hinge line to a flight control surface. 11. The actuator of claim 1 wherein the stator housing is adapted for connection to a fixed flight surface in a wing. 12. The actuator of claim 1 wherein the continuous seals are selected from the group consisting of an O-ring, an X-ring, a Q-ring, a D-ring, and an energized seal. 13. The actuator of claim 8 wherein a first opposite pair of the pressure chambers is adapted to be connected to a first external pressure source and a second opposite pair of the pressure chambers is adapted to be connected to a second external pressure source. 14. A method of rotary actuation comprising: providing a rotary actuator including: a stator housing having a bore disposed axially therethrough;a first static piston assembly and a second static piston assembly, each static piston assembly having an outer longitudinal peripheral surface adapted to contact an inner cylindrical wall of a portion of the stator housing, each static piston assembly including:two interior partial cylindrical surfaces, a single radial inwardly disposed vane positioned between the two interior partial cylindrical surfaces, and two radial inwardly disposed half vanes positioned at respective distal ends of the two interior partial cylindrical surfaces, wherein the first static piston assembly and the second static piston assembly are disposed with one of the half vanes of the first static piston assembly adjacent longitudinally to one of the half vanes of the second static piston assembly and the other half vane of the first static piston assembly adjacent longitudinally to the other half vane of the second static piston assembly, and wherein each of the single vanes and the half vanes has a inwardly disposed peripheral longitudinal face and a first peripheral lateral faces and a second peripheral lateral face;each static piston assembly further includes two continuous seal grooves, each of said seal grooves disposed in a pathway along the peripheral longitudinal face and the first and second peripheral lateral faces of the single vane and the peripheral longitudinal face and the first and second peripheral lateral faces of one of the half vanes;a continuous seal disposed in each of the two continuous seal grooves; anda rotor adapted to be received in the bore of the housing, said rotor including a first end section and a second end section and a middle section disposed between the first end section and the second end section; said first and second end sections being formed about the axis of the rotor and having a diameter adapted to be received in the bore of the housing, said middle section having a first diameter formed about the axis of the rotor with a radial diameter smaller than the diameter of the end sections, said middle section further including a pair of opposing recesses about the axis of the rotor, each opposing recess having a second diameter smaller than the first diameter, wherein the middle section of the rotor includes first, second, third and fourth longitudinal faces, each between respective portions of the first diameter and the second diameter;providing a first fluid at the first pressure to the first and second longitudinal faces on the middle section of the rotor;providing a second at a second pressure to the third and fourth longitudinal face on the middle section of the rotor; androtating the rotor in a first direction of rotation, when the second pressure is less than the first pressure. 15. The method of claim 14, wherein the single vane extends an inward perpendicular distance from the two interior partial cylindrical surfaces such that portions of the continuous seals disposed in the continuous seal grooves in the longitudinal face of the single vane will contact the second diameter of the rotor and the half vanes extend an inward perpendicular distance from the two partial cylindrical surfaces such that portions of the continuous seals disposed in the continuous seal grooves in the longitudinal face of the half vanes, will contact with the first diameter of the rotor. 16. The method of claim 14, further comprising stopping the rotation of the rotor by contacting the first longitudinal face of the middle section of the rotor with one of the single vanes of the static piston assemblies. 17. The method of claim 14, further rotating the rotor in a second direction opposite to the first direction of rotation by increasing the second pressure and reducing the first pressure until the second pressure is greater than the first pressure. 18. The method of claim 17, further including: stopping the rotation of the rotor in the opposite direction by contacting the second longitudinal face of the middle section of the rotor with one of the single vanes of the static piston assemblies. 19. The method of claim 14, wherein the first and second longitudinal faces cooperate with the single inwardly disposed vanes and the half vanes of the first and second static piston assemblies to define a first pair of opposite chambers, and the third and fourth longitudinal faces cooperate with the single inwardly disposed vanes and the half vanes of the first and second static piston assemblies to define a second pair of opposite chambers, such that the first fluid at the first pressure is provided to the first pair of opposite chambers, and the second at the second pressure is provided to the second pair of opposite chambers. 20. The method of claim 14, wherein the first lateral peripheral face further includes a first fluid port formed therethrough and the second lateral peripheral face includes a second fluid port formed therethrough, and wherein providing the first fluid at the first pressure comprises providing the first fluid through the first fluid port and providing the second fluid at the second pressure comprises providing the second fluid through the second fluid port.

이 특허에 인용된 특허 (6)

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특허 상세정보

Hydraulic blocking rotary actuator

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이 특허에 인용된 특허 (6)

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특허 상세정보

Hydraulic blocking rotary actuator

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이 특허에 인용된 특허 (6)

IPC 상위 출원인

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상세정보조회

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IPC 상세정보(version : 201201)

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