IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0114511
(2008-05-02)
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등록번호 |
US-7837439
(2011-01-22)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
St. Onge Steward Johnston & Reens LLC
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
A wind turbine blade comprising one or more oscillation dampers for damping oscillations or vibrations of the wind turbine blade. The first damper parts being rigidly connected to the blade or being a part of the blade. The dampers further comprise second damper parts, wherein the first damper part
A wind turbine blade comprising one or more oscillation dampers for damping oscillations or vibrations of the wind turbine blade. The first damper parts being rigidly connected to the blade or being a part of the blade. The dampers further comprise second damper parts, wherein the first damper part surfaces and the second damper part surfaces are arranged to move relatively to each other during the oscillations. Even further the dampers comprise a load transferring coupling, coupling the first damper part surfaces and the second damper part surfaces, so that the relative movement results in a oscillation-damping dissipation of kinetic energy.
대표청구항
▼
What is claimed is: 1. A wind turbine blade comprising one or more oscillation dampers for damping oscillations or vibrations of the wind turbine blade, said dampers comprising one or more first damper parts having one or more first damper part surfaces, said first damper parts being rigidly connec
What is claimed is: 1. A wind turbine blade comprising one or more oscillation dampers for damping oscillations or vibrations of the wind turbine blade, said dampers comprising one or more first damper parts having one or more first damper part surfaces, said first damper parts being rigidly connected to said blade or being a part of said blade, one or more second damper parts having one or more second damper part surfaces, wherein said first damper part surfaces and said second damper part surfaces are arranged to move relatively to each other during said oscillations, said dampers further comprising a load transferring coupling directly or indirectly coupling said first damper part surfaces and said second damper part surfaces, so that said relative movement result in a oscillation-damping dissipation of kinetic energy, and wherein said load transferring coupling comprises a semi-liquid substance. 2. The wind turbine blade according to claim 1, wherein said one or more oscillation dampers are positioned on or in the part of said wind turbine blade which are constituted by the inner 80% of said blades total length, as measured from the root of said blade. 3. The wind turbine blade according to claim 1, wherein said one or more oscillation dampers are positioned in, on or in proximity of said wind turbine blades trailing edge. 4. The wind turbine blade according to claim 1, wherein said second damper parts are substantially inflexible. 5. The wind turbine blade according to claim 1, wherein said one or more second damper parts has a relationship between modulus of elasticity and density which is greater than 10 MPa·m3/kg. 6. The wind turbine blade according to claim 1, wherein said one or more second damper parts are made of a fibre reinforced polymer-matrix composite. 7. The wind turbine blade according to claim 1, wherein said load transferring coupling has a high load transferring capacity, which at least is better than waters load transferring capacity. 8. The wind turbine blade according to claim 1, wherein at least one of said one or more second damper parts and said one or more first damper parts has an elongated shape. 9. The wind turbine blade according to claim 1, wherein said one or more first damper parts comprise one or more cavities, wherein said one or more second damper parts are substantially located. 10. The wind turbine blade according to claim 9, wherein said one or more cavities comprise more than one of said second damper parts. 11. The wind turbine blade according to claim 9, wherein said one or more cavities are formed as orifices, slits, gaps, or holes. 12. The wind turbine blade according to claim 9, wherein said more than one second damper parts are placed substantially end to end in said one or more cavities. 13. The wind turbine blade according to claim 1, wherein at least one of said one or more second damper parts and said one or more first damper parts comprise separating or fixating means for substantially preventing said one or more second damper parts from moving freely at least in their longitudinal direction. 14. The wind turbine blade according to claim 13, wherein said separating means are volume compensating material positioned between or at the ends of said one or more second damper parts. 15. The wind turbine blade according to claim 13, wherein said fixating means comprise means for fixating said one or more second damper parts at the middle or in close proximity of the middle of said one or more second damper parts longitudinal extent. 16. The wind turbine blade according to claim 1, wherein said semi-liquid substance surrounds or substantially surrounds said one or more second damper parts. 17. The wind turbine blade according to claim 16, wherein said semi-liquid substance has a viscosity of between 50 and 200,000 Pa·s. 18. The wind turbine blade according to claim 1, wherein said semi-liquid substance has a viscosity index which is greater than 80. 19. The wind turbine blade according to claim 1, wherein said semi-liquid substance are completely surrounded by at least one of said one or more first damper parts and said blade. 20. The wind turbine blade according to claim 1, wherein said one or more first damper parts are formed integrally in said blades load-carrying structure. 21. The wind turbine blade according to claim 1, wherein said one or more oscillation dampers are positioned in, on or in proximity of the position on or in said wind turbine blade where the strain originating from edgewise blade oscillations is the biggest. 22. The wind turbine blade according to claim 1, wherein said one or more second damper parts has a longitudinal extent of between 10 and 10,000 mm. 23. The wind turbine blade according to claim 1, wherein the distance between a first damper part surface and a second damper part surface is between 0.001 and 2 mm. 24. The wind turbine blade according to claim 1, wherein said one or more oscillation dampers are provided primarily for damping edgewise oscillations or vibrations of said wind turbine blade. 25. The wind turbine comprising at least one wind turbine blade according to claim 1. 26. An oscillation damper for damping edgewise oscillations or vibrations of a wind turbine blade, said damper comprising one or more first damper parts having one or more first damper part surfaces, one or more second damper parts having one or more second damper part surfaces, wherein said first damper part surfaces and said second damper part surfaces are arranged to move relatively to each other during said oscillations, said dampers further comprising a load transferring coupling directly or indirectly coupling said first damper part surfaces and said second damper part surfaces, so that said relative movement result in a oscillation-damping dissipation of kinetic energy, wherein said load transferring coupling comprises a semi-liquid substance. 27. The oscillation damper according to claim 26, wherein said one or more first damper parts comprise one or more cavities, wherein said one or more second damper parts are substantially located. 28. The oscillation damper according to claim 26, wherein at least one of said one or more second damper parts and said one or more first damper parts has an elongated shape. 29. The oscillation damper according to claim 26, wherein said damper comprise means for substantially preventing said one or more second damper parts from moving freely at least in their longitudinal direction. 30. The oscillation damper according to claim 26, wherein said second damper parts are substantially inflexible, having a relationship between modulus of elasticity and density which is greater than 10 MPa·m3/kg. 31. A method for damping oscillations of a wind turbine blade, said method comprising the steps of integrating or joining one or more first damper parts having one or more first damper part surfaces in or to said wind turbine blade, arranging one or more second damper part surfaces of one or more second damper parts to move relatively to said one or more first damper part surfaces during said oscillations, and directly or indirectly coupling said first damper part surfaces to said second damper part surfaces by means of a load transferring coupling, so that said relative movement result in a oscillation-damping dissipation of kinetic energy, wherein said load transferring coupling comprises a semi-liquid substance. 32. The method according to claim 31, wherein said semi-liquid substance has a viscosity of between 50 and 200,000 Pa·s. 33. The method according to claim 31, wherein said method further involves preventing said one or more second damper parts from moving freely at least in a longitudinal direction. 34. The method according to claim 31 wherein said oscillation damper is supplementary mounted as a unit to a wind turbine blade.
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