Rotor blade assembly with shim plate for mitigation pitch bearing loads
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F03B-003/12
F03D-001/06
출원번호
US-0036463
(2013-09-25)
등록번호
US-9523348
(2016-12-20)
발명자
/ 주소
Jacobsen, Eric Morgan
Minadeo, Adam Daniel
Vossler, Alexander William
출원인 / 주소
General Electric Company
대리인 / 주소
Dority & Manning, P.A.
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
The invention is directed to a rotor blade assembly for a wind turbine designed to mitigate pitch bearing loads. The rotor blade assembly includes a rotor blade, a pitch bearing, and at least one shim plate. The rotor blade includes a body extending between a blade root and a blade tip. The pitch be
The invention is directed to a rotor blade assembly for a wind turbine designed to mitigate pitch bearing loads. The rotor blade assembly includes a rotor blade, a pitch bearing, and at least one shim plate. The rotor blade includes a body extending between a blade root and a blade tip. The pitch bearing includes an outer race, an inner race, and a plurality of roller elements between the outer race and the inner race. As such, the inner race is rotatable relative to the outer race. The at least one shim plate may be configured between the inner race and the blade root or between the outer race and a hub of the wind turbine so as to mitigate loads experienced by the pitch bearing.
대표청구항▼
1. A rotor blade assembly for a wind turbine, the rotor blade assembly comprising: a rotor blade including a body extending between a blade root and a blade tip;a pitch bearing comprising an outer race, an inner race, and a plurality of roller elements between the outer race and the inner race such
1. A rotor blade assembly for a wind turbine, the rotor blade assembly comprising: a rotor blade including a body extending between a blade root and a blade tip;a pitch bearing comprising an outer race, an inner race, and a plurality of roller elements between the outer race and the inner race such that the inner race is rotatable relative to the outer race, the inner race being coupled to the blade root, the outer race configured to couple to a hub of the wind turbine; andat least one shim plate configured between the inner race and the blade root, the shim plate comprising one or more through holes configured to receive at least one of a root bolt of the blade root or a hub bolt of the hub so as to couple the shim plate between one of the inner race and the blade root or the outer race and the hub, the shim plate comprising a plurality of segments, each of the segments comprising at least one slot, wherein the slots of each segment form the through holes when the segments are connected,wherein the shim plate is configured to mitigate loads in the pitch bearing. 2. The rotor blade assembly of claim 1, wherein the inner race comprises a top surface defining a radial dimension, the shim plate having a width that is equal to or less than the radial dimension. 3. The rotor blade assembly of claim 1, further comprising a plurality of shim plates spaced circumferentially about the inner race, the plurality of shim plates secured between the inner race and the blade root. 4. The rotor blade assembly of claim 3, wherein at least one of the shim plates is located on a pressure side of the pitch bearing corresponding to a pressure side surface of the rotor blade and at least one of the shim plates is located on a suction side of the pitch bearing corresponding to a suction side surface of the rotor blade. 5. The rotor blade assembly of claim 1, further comprising at east one shim plate between the outer race and the hub. 6. The rotor blade assembly of claim 1, wherein the at least one shim plate comprises a base and at least one tapered edge. 7. The rotor blade assembly of claim 6, wherein the at least one shim plate further comprises opposing tapered longitudinal edges. 8. The rotor blade assembly of claim 1, wherein the at least one shim plate further comprises a tapered radial edge. 9. The rotor blade assembly of claim 1, wherein the at least one shim plate comprises a plurality of shim layers having varying lengths. 10. The rotor blade assembly of claim 9, wherein the plurality of shim layers are stacked atop each other such that the varying lengths form opposing tapered edges having a step configuration. 11. The rotor blade assembly of claim 1, wherein the at least one shim plate is formed integrally with one of the blade root or the pitch bearing. 12. A rotor blade assembly for a wind turbine, the rotor blade assembly comprising: a rotor blade including a body extending between a blade root and a blade tip;a pitch bearing comprising an outer race, an inner race, and a plurality of roller elements between the outer race and the inner race such that the inner race is rotatable relative to the outer race, the outer race being coupled to a hub of the wind turbine; andat least one shim plate configured between the outer race and the hub at least one shim plate configured between the inner race and the blade root, the at least one shim plate comprising opposing tapered longitudinal edges,wherein the shim plate is configured to mitigate loads in the pitch bearing. 13. The rotor blade assembly of claim 12, wherein the outer race comprises a bottom surface defining a radial dimension, the shim plate having a width that is equal to or less than the radial dimension. 14. The rotor blade assembly of claim 12, wherein the at least one shim plate further comprises a tapered radial edge. 15. A method for mitigating loads in a pitch bearing of a wind turbine, the method comprising: providing a rotor blade configured to couple to a hub of a wind turbine via the pitch bearing, the pitch bearing comprising and outer race and an inner race;identifying at least one location on the pitch bearing experiencing a loading;installing at least one shim plate at the identified location, that least one shim plate comprising opposing tapered longitudinal edges; and,securing the rotor blade to the hub of the wind turbine via the pitch bearing such that the shim plate mitigates the loading in the pitch bearing during operation of the wind turbine. 16. The method of claim 15, further comprising sizing the shim plate to accommodate the loading. 17. The method of claim 15, wherein the loading is representative of at least one of bearing ball contact stresses, blade root resultant moments, or hard pressure spots.
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이 특허에 인용된 특허 (5)
Weitkamp, Roland; Lütze, Henning; Riesberg, André; Anemüller, Jochen, Means for adjusting the rotor blade of a wind power plant rotor.
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