[특허]Actuator for adjusting a rotor blade pitch angle

Liebherr-Werk Biberach GmbH

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특허 상세정보

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Actuator for adjusting a rotor blade pitch angle

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F04D-029/36
미국특허분류(USC)	416/146.A; 184/004; 184/006.12
출원번호	UP-0529874 (2006-09-29)
등록번호	US-7699584 (2010-05-20)
우선권정보	DE-20 2005 015 774 U(2005-10-07)
발명자 / 주소	Mollhagen, Klaus-Peter
출원인 / 주소	Liebherr-Werk Biberach GmbH
대리인 / 주소	Jones, Allston L.
인용정보	피인용 횟수 : 7 인용 특허 : 3

초록
▼

Actuator for adjusting pitch angle of a rotor blade of a wind turbine rotatably mounted on a rotor hub, comprising a first drive element connectable with the rotor blade, a second drive element in meshing engagement with said first drive element, a lubricating device for lubricating the two drive elements and lubrication controller. A rotor with a rotor hub, on which at least one rotor blade is rotatably mounted, with actuator adjustable pitch angle. A wind turbine comprising such rotor and such actuator. Selective lubrication of zero teeth of the gear stage of the actuator considers the rotary position of the drive elements of the gear stage with respect to each other. The lubricating device includes a lubricant passage to selectively supply portion of first drive element and/or portion of second drive element meshing therewith depending on engagement position of drive elements or rotary position of rotor blade.

대표
청구항
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What is claimed is: 1. An actuator for adjusting the pitch angle of a rotor blade (2) of a wind turbine (3), which is rotatably mounted on a rotor hub (1), comprising a first drive element (4) connectable with the rotor blade (2), a second drive element (5) in meshing engagement with said first drive element (4), as well as a lubricating device (6) for lubricating the two drive elements (4, 5), characterized in that the lubricating device (6) has a lubricant passage (7) for the selective supply of lubricant directly to at least one of a portion (8) of the first drive element (4) and a portion (9) of the second drive element (5), when portions (8, 9) are in engagement with each other when the rotor blade (2) is in its preferred working position, and a supply control means (10) for controlling the supply of lubricant through said lubricant passage (7) in dependence on the engagement position of the two drive elements (4, 5). 2. The actuator as claimed in claim 1, wherein the supply control means (10) includes an enabling switch, which activates the supply of lubricant through the lubricant passage (7) when portions (8, 9) of said two drive elements (4, 5) are in engagement with each other, and which blocks the supply of lubricant through the lubricant passage (7) when said two portions (8, 9) are out of engagement. 3. The actuator as claimed in 1, wherein the supply control means (10) includes a valve (12) in the lubricant passage (7), in particular at the orifice region thereof, which can be actuated in dependence on the engagement position of the two drive elements (4, 5) and/or in dependence on the pitch angle of the associated rotor blade. 4. The actuator as claimed in 3, wherein the valve (12) constitutes a check valve whose shut-off member (14) is actuated towards the closing position of the valve by the lubricant pressure in the lubricant passage (7). 5. The actuator as claimed in claim 1, wherein the lubricant passage (7) opens into a tooth base region of the first and/or second drive element (4, 5). 6. The actuator as claimed in claim 1, wherein the lubricant passage (7) is passed through the second drive element (5) and/or the supply control means (10, 12) is arranged in the second drive element (5). 7. The actuator as claimed in claim 6, wherein the lubricant passage (7) can be brought into a flow connection with a lubricant port (15) disposed on the end face of the second drive element (5). 8. The actuator as claimed in claim 6, wherein the lubricant passage (7) can be brought into a flow connection with a lubricant port (15) provided on a drive shaft (16) and/or a drive shaft housing (17). 9. The actuator as claimed in claim 8, wherein the lubricant passage (7) is passed through a drive shaft (16) and communicates with a drive shaft housing interior, in which bearings are accommodated for supporting the drive shaft (16). 10. The actuator as claimed in claim 1, wherein the lubricant passage (7) is passed through a drive shaft bearing housing (17) or through the rotor hub (1) and opens on the end face onto the toothing of the two drive elements (4, 5). 11. The actuator as claimed in claim 10, wherein for at least on one of said portions (8, 9) of the two drive elements (4, 5) an actuating cam (18) is provided for opening the valve (12). 12. The actuator as claimed in claim 1, wherein the lubricant passage (7) is passed through the first drive element (4) and/or a bearing portion (19) supporting the first drive element (4). 13. The actuator as claimed in claim 12, wherein the lubricant passage (7) is passed through the first drive element (4) and the bearing ring (19) such that the corresponding lubricant passage portions (7a, 7b) are in flow connection with each other only in one rotary position of the first drive element (4) relative to the bearing portion (19). 14. The actuator as claimed in claim 1, wherein the first drive element (4) is a slewing ring and the second drive element (5) is a drive pinion extending inside the slewing ring. 15. The actuator as claimed in claim 14, wherein the second drive element (5) is seated on a drive shaft which is connectable with an actuator motor (21) and/or forms the motor shaft thereof. 16. A rotor for a wind turbine (3) comprising an actuator (22) as claimed in claim 1. 17. The rotor as claimed in claim 16, wherein the rotor blade (2)) is seated on an internally toothed slewing ring (4) of a roller bearing (20) supported on the rotor hub (1), and can be driven by a drive pinion (5) arranged coaxially with the roller bearing (20), which is seated on a drive shaft (16) supported on the rotor hub (1) via a drive shaft bearing housing (17). 18. An actuator for adjusting the pitch angle of a rotor blade (2) of a wind turbine (3), which is rotatably mounted on a rotor hub (1), comprising a first drive element (4) connectable with the rotor blade (2), a second drive element (5) in meshing engagement with said first drive element (4), as well as a lubricating device (6) for lubricating the two drive elements (4, 5), characterized in that the lubricating device (6) has a lubricant passage (7) for the selective supply of lubricant to the portion (8) of the first drive element (4) and/or the portion (9) of the second drive element (5), which are in engagement with each other when the rotor blade (2) is in its preferred working position, and a supply control means (10) for controlling the supply of lubricant through said lubricant passage (7) in dependence on the engagement position of the two drive elements (4, 5); wherein the supply control means (10) includes a valve (12) in the lubricant passage (7), in particular at the orifice region thereof, which can be actuated in dependence on the engagement position of the two drive elements (4, 5) and/or in dependence on the pitch angle of the associated rotor blade; and wherein the valve (12) includes a valve opener (13) which is movable between an opening position and a closing position and protrudes in the vicinity of the orifice of the lubricant passage (7). 19. The actuator as claimed in claim 18, wherein the valve opener (13) includes a valve tappet which extends in the lubricant passage (7) and protrudes from the same and opens the valve (12) by being depressed into the lubricant passage (7). 20. An actuator for adjusting the pitch angle of a rotor blade (2) of a wind turbine (3), which is rotatably mounted on a rotor hub (1), comprising a first drive element (4) connectable with the rotor blade (2), a second drive element (5) in meshing engagement with said first drive element (4), as well as a lubricating device (6) for lubricating the two drive elements (4, 5), characterized in that the lubricating device (6) has a lubricant passage (7) for the selective supply of lubricant to the portion (8) of the first drive element (4) and/or the portion (9) of the second drive element (5), which are in engagement with each other when the rotor blade (2) is in its preferred working position, and a supply control means (10) for controlling the supply of lubricant through said lubricant passage (7) in dependence on the engagement position of the two drive elements (4, 5); wherein the first drive element (4) forms a bearing ring of a rotary bearing (20), by means of which the rotor blade (2) can be supported on the rotor hub (1), where in particular the first drive element (4) forms the inner ring of the rotary bearing (20) and has an internal toothing with which meshes the second drive element (5). 21. The actuator as claimed in claim 20, wherein the second drive element (5) is seated on a drive shaft which is connectable with an actuator motor (21) and/or forms the motor shaft thereof. 22. A wind turbine comprising a rotor (23) as claimed in claim 21.

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Actuator for adjusting a rotor blade pitch angle

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Actuator for adjusting a rotor blade pitch angle

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이 특허에 인용된 특허 (3)

이 특허를 인용한 특허 피인용횟수: 7

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