Multi-piece passive load reducing blades and wind turbines using same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-027/46
출원번호
UP-0193884
(2005-07-29)
등록번호
US-7690895
(2010-05-20)
발명자
/ 주소
Moroz, Emilian Mieczyslaw
출원인 / 주소
General Electric Company
대리인 / 주소
McGinness, Esq., James
인용정보
피인용 횟수 :
10인용 특허 :
15
초록▼
A wind turbine includes a tower and a generator on the tower. The generator includes a rotor with at least one assembled blade. The assembled blade includes at least an inner piece, an outer piece, and a joint configured for assembly and disassembly of the inner piece and said outer piece. The outer
A wind turbine includes a tower and a generator on the tower. The generator includes a rotor with at least one assembled blade. The assembled blade includes at least an inner piece, an outer piece, and a joint configured for assembly and disassembly of the inner piece and said outer piece. The outer piece is configured to provide passive load alleviation.
대표청구항▼
What is claimed is: 1. A blade kit for a rotor, said blade kit comprising a blade extending axially from a blade root to a blade tip and extending chordwise from a leading edge to a trailing edge and having an airfoil shape along the entire chordwise span, said blade further comprising at least an
What is claimed is: 1. A blade kit for a rotor, said blade kit comprising a blade extending axially from a blade root to a blade tip and extending chordwise from a leading edge to a trailing edge and having an airfoil shape along the entire chordwise span, said blade further comprising at least an inner piece, an outer piece, and a joint defined between said inner piece and said outer piece, said inner piece extends from said blade root to said joint, said blade root for coupling to a hub of the rotor, said outer piece extends from said joint to said blade tip, said outer piece is twistable relative to said inner piece to approximate a target pitch value when a given load condition occurs when said blade is fully assembled and coupled to the hub. 2. A blade kit in accordance with claim 1 wherein said outer piece is aft swept. 3. A blade kit in accordance with claim 1 wherein said inboard region of said assembled blade provides a torsional moment that acts in an opposite direction to a torsional moment at said blade tip when said assembled blade is mounted on the rotor. 4. A blade kit in accordance with claim 1 wherein said inboard region is torsionally rigid. 5. A blade kit in accordance with claim 1 wherein said joint is configured to assemble said inner piece and said outer piece at about 70% of a radius of said assembled blade. 6. A blade kit in accordance with claim 1 wherein said outer piece is aft swept with a linear sweep. 7. A blade kit in accordance with claim 6 wherein an angle of the linear sweep is approximately 25 degrees. 8. A blade kit in accordance with claim 1 wherein said outer piece is constructed from at least one of a lighter weight material and a different structure than said inner piece. 9. A blade kit in accordance with claim 1 wherein said outer piece is aft swept in a continuous curvature. 10. A blade kit in accordance with claim 1 wherein said joint comprises a torque tube having a torsional stiffness selected to allow said outer piece to achieve or approximate the target pitch value. 11. A blade kit in accordance with claim 1 wherein said outer piece is aft swept and said inner piece is forward swept to provide a torsional moment acting in an opposite direction to that of said outer piece, to balance a torsional load of said assembled blade. 12. A blade kit in accordance with claim 1 further comprising a flexible fairing configured to span said joint at said assembled blade. 13. A wind turbine comprising: a tower; and a generator on said tower, said generator comprising a rotor with at least one assembled blade extending axially from a blade root to a blade tip and extending chordwise from a leading edge to a trailing edge and having an airfoil shape along the entire chordwise span, said blade comprising an inner piece, an outer piece, and a joint defined between said inner piece and said outer piece, said inner piece extends from said blade root to said joint, said blade root for coupling to a hub of said rotor, said outer piece extends from said joint to said blade tip, said outer piece is twistable relative to said inner piece to approximate a target pitch value when a given load condition occurs when said blade is fully assembled and coupled to said hub. 14. A wind turbine in accordance with claim 13 wherein said outer piece is aft swept. 15. A wind turbine in accordance with claim 13 wherein said inboard region is torsionally rigid. 16. A wind turbine in accordance with claim 13 wherein said joint comprises a torque tube having a torsional stiffness selected to allow said outer piece to achieve or approximate the target pitch value. 17. A wind turbine in accordance with claim 13 wherein said outer piece is aft swept and said inner piece is forward swept to provide a torsional moment acting in an opposite direction to that of said outer piece, to balance a torsional load of said assembled blade. 18. A method for assembling a rotor blade on a rotor of a wind turbine, said method comprising: transporting at least two unassembled pieces of blade, the pieces including an outer blade part having an aft sweep and an inner blade part; assembling at least the outer blade part and the inner blade part into a blade at a joint, the inner blade part having a blade root for coupling to a hub of the rotor, the inner blade part extending axially between the blade root and the joint, the outer blade part extending axially from the joint to a blade tip, the inner blade part and the outer blade part extending chordwise between a leading edge and a trailing edge and having an airfoil shape along the entire chordwise span, the outer blade part is twistable relative to the inner blade part to approximate a target pitch value when a given load condition occurs when the blade is fully assembled and coupled to the hub; and assembling the blade onto the rotor of the wind turbine. 19. A method in accordance with claim 18 wherein said assembling at least the outer blade part and the inner blade part at a joint further comprises joining the outer blade part and the inner blade part using a torque tube exhibiting a torsional stiffness selected to allow the outer blade part to achieve or approximate the target pitch value. 20. A method in accordance with claim 18 wherein the outer blade part is constructed from at least one of a lighter weight material than the inner blade part and a different construction, than the inner blade part.
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이 특허에 인용된 특허 (15)
Schmitz Fredric H. (Palo Alto CA) Boxwell Donald A. (San Jose CA) Vause C. Rande (Campbell CA), Acoustically swept rotor.
Vuillet Alain E. (Bouc Belair FRX) Philippe Jean J. (Versailles FRX) Desopper Andr (Garches FRX), Blade with curved end for a rotary airfoil of an aircraft.
Splettstoesser Wolf R.,DEX ; Van De Wall Berend,DEX ; Delrieux Yves,FRX ; Gardarein Patrick,FRX, Blade with reduced sound signature, for aircraft rotating aerofoil, and rotating aerofoil comprising such a blade.
Carter ; Jr. J. Warne (Burkburnett TX) Carter ; Sr. J. Warne (Wichita Falls TX), Wind-driven generator apparatus and method of making blade supports therefor.
Arendt, Cory P.; Baker, Myles L.; Wright, Rick Thomas, Segmented wind turbine blades with truss connection regions, and associated systems and methods.
Melton, Patrick Benedict; Crawley, Bradley Donald; Cihlar, David William; Rohrssen, Robert Joseph; Chila, Ronald James, System and method for flow control in gas turbine engine.
Landa, Bernard; Latorre, Carlos Eduardo; Fric, Thomas Frank; Converse, Thomas Omar; Dinjus, Thomas; Brown, Michael Gregory; Torbohm, Gert; Schuell, Nadine, Wind turbine farm and method of controlling at least one wind turbine.
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