IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0988691
(2009-04-21)
|
등록번호 |
US-9017034
(2015-04-28)
|
우선권정보 |
EP-08388016 (2008-04-21) |
국제출원번호 |
PCT/EP2009/054729
(2009-04-21)
|
§371/§102 date |
20101020
(20101020)
|
국제공개번호 |
WO2009/130212
(2009-10-29)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
4 |
초록
▼
An upwind wind turbine comprising blades extending radially from a rigid hub on a main shaft having a horizontal axis is described. The blades and hub constitute a rotor with a rotor plane. The main shaft is pivotally mounted in a nacelle on top of a tower which pivots around the vertical axis of th
An upwind wind turbine comprising blades extending radially from a rigid hub on a main shaft having a horizontal axis is described. The blades and hub constitute a rotor with a rotor plane. The main shaft is pivotally mounted in a nacelle on top of a tower which pivots around the vertical axis of the tower. The rotor plane adjusts in relation to wind direction, so during normal use the rotor is positioned on the upwind side of the tower. Each blade has at least a first leeward supporting mechanism having first and second ends. The first end connects to the blade at a first leeward mounting point positioned in a radial distance from the horizontal axis. The second end connects to a second leeward mounting point at a rotatable part and is positioned in an axial distance from the rotor plane on the leeward side of the rotor.
대표청구항
▼
1. A wind turbine (102) comprising a number of blades (110, 210, 410) extending substantially radially from a rigid hub (108, 208, 408) on a main shaft (886) having a substantially horizontal axis (221), the blades (110, 210, 410) together with the hub (108, 208, 408) constituting a rotor with a rot
1. A wind turbine (102) comprising a number of blades (110, 210, 410) extending substantially radially from a rigid hub (108, 208, 408) on a main shaft (886) having a substantially horizontal axis (221), the blades (110, 210, 410) together with the hub (108, 208, 408) constituting a rotor with a rotor plane (212), and which can be put into rotation by wind, wherein the main shaft (886) is pivotally mounted in a nacelle (106, 206) mounted on top of a tower (104, 204), the nacelle (106, 206) being able to pivot around a vertical axis in relation to the tower (104, 204), hereby being able to adjust the rotor plane of the blades (110, 210, 410) in relation to a direction of the wind, and wherein the wind turbine is an upwind machine in that the rotor during normal use of the wind turbine (102) is positioned on the upwind side of the tower (104, 204), the rotor during normal use of the wind turbine (102) having a windward side (226) and a leeward side (227), and each blade having an innermost part (228, 628) comprising a root section of the blade and an outermost part (229, 629) comprising a tip section of the blade, characterized in that each blade (110, 210, 410) is supported on the leeward side (227) so as to support the blade against forces in the upwind direction by at least a first leeward supporting means (220, 420, 520, 720, 1020) having a first end and a second end, the first end being connected to the blade at a first leeward mounting point (222, 422, 522, 722, 1022) positioned in a radial distance from the horizontal axis (221), and the second end being connected to a second leeward mounting point (224, 424, 524, 1024) at a rotatable part of the wind turbine (102), the second leeward mounting point being positioned in an axial distance from the rotor plane (212) on the leeward side (227) of the rotor, wherein the first leeward mounting point (222, 422, 522, 722, 1022) on the blade (110, 210, 410) is positioned in a radial distance of 20-100% of the full length of the blade (110, 210, 410) from the hub (108, 208, 408), wherein the blade is provided with at least a first spacing means (550, 1050) that protrudes substantially normally to the rotor plane (212) on the leeward side of the rotor, and where the spacing means intersects the first leeward supporting means (220, 420, 520, 720, 1020). 2. A wind turbine (102) according to claim 1, wherein each blade (110, 210, 410) is supported on the windward side by at least a first windward supporting means (330, 430) having a first end and a second end, the first end being connected to the blade at a first windward mounting point (332, 432) positioned in a radial distance from the hub (108, 208, 408), and the second end being connected to a second windward mounting point (334, 434) at a rotatable part of the wind turbine (102), the second windward mounting point (334, 434) being positioned in an axial distance from the rotor plane (212) on the windward side (226) of the rotor. 3. A wind turbine (102) according to claim 1, wherein the blades (110, 210, 410) are fiber-reinforced polymer shell bodies. 4. A wind turbine (102) according to claim 1, wherein the first leeward supporting means (330, 430) and/or a first windward supporting means (220, 420, 520, 720, 1020) are chosen from the group of stays, stiffeners, guys, wires, or struts. 5. A wind turbine (102) according to claim 1, wherein the first leeward mounting point (222, 422, 522, 722, 1022) on the blade (110, 210, 410) is positioned in a radial distance of 25-70% of the full length of the blade (110, 210, 410) from the hub (108, 208, 408), or alternatively between 30%-60%. 6. A wind turbine (102) according to claim 1, wherein the blade is provided with the first leeward mounting point (222, 422, 522, 722, 1022) in proximity to the leading edge (440) of the blade (110, 210, 410), and an additional first leeward mounting point (222, 422, 522, 722, 1022) in proximity to the trailing edge (441) of the blade (110, 210, 410), the two first leeward mounting points (222, 422, 522, 722, 1022) having substantially the same radial distance from the hub (108, 208, 408). 7. A wind turbine (102) according to claim 1, wherein the second leeward mounting point (224, 424, 524) is located on an extension sleeve (225, 425) that is connectively mounted to the hub (108, 208, 408) on the leeward side of the rotor, so that the extension sleeve (225, 425) surrounds the main shaft (886) in a radial distance. 8. A wind turbine (102) according to the claim 7, wherein the extension sleeve (225, 425) mounted on the hub (108, 208, 408) is rotatably mounted on the nacelle (106, 206) by a bearing (884, 984). 9. A wind turbine (102) according to claim 1, wherein each blade (110, 210, 410) has a total length of at least 40 meters. 10. A wind turbine (102) according to claim 1, wherein the innermost (228, 628) and outermost part (229, 629) of the blade (110, 210, 410) are constructed as two individual parts, where one or both parts may be pitched around a longitudinal axis of the blade (110, 210, 410), oriented in the substantially radial direction. 11. A wind turbine (102) according to claim 1, wherein at least the first leeward supporting means (220, 420, 520, 720, 1020) is provided with a swivel joint, the swivel joint being a ball joint (772), or where at least part of the first leeward supporting means (220, 420, 520, 720, 1020) is flexible. 12. A wind turbine (102) according to claim 1, wherein the nacelle comprises a load bearing cylinder (880, 980). 13. A wind turbine (102) according to claim 1, wherein the second leeward mounting point (224, 424, 524, 1024) is located on a ring (990) that is rotatably mounted around the nacelle (106, 206), the ring being arranged substantially coaxially with the main shaft (886). 14. A method of supporting blades (110, 210, 410) of an upwind wind turbine (102) comprising a two or three blades (110, 210, 410), the blades being made of fiber-reinforced polymer shell bodies, each blade having a length of at least 40 meters, the blades extending substantially radially from a rigid hub (108, 208, 408), the blades (110, 210, 410) together with the hub (108, 208, 408) constituting a rotor with a rotor plane (212), characterized by providing each blade (110, 210, 410) with at least a first leeward supporting means (220, 420, 520, 720, 1020) on a leeward side (227) of the rotor plane (212), the first leeward supporting means (220, 420, 520, 720, 1020) having a first end and a second end, the first end being connected to the blade (110, 210, 410) at a first leeward mounting point (222, 422, 522, 722, 1022) positioned in a radial distance from a horizontal axis (221), and the second end being connected to a second leeward mounting point (224, 424, 524, 1024) at a rotatable part of the wind turbine (102), the second leeward mounting point (224, 424, 524, 1024) being positioned in an axial distance from the rotor plane (212) on a leeward side (227) of the rotor, wherein the first leeward mounting point (222, 422, 522, 722, 1022) on the blade (110, 210, 410) is positioned in a radial distance of 20-100% of the full length of the blade (110, 210, 410) from the hub (108, 208, 408) wherein the blade is provided with at least a first spacing means (550, 1050) that protrudes substantially normally to the rotor plane (212) on the leeward side of the rotor, and where the spacing means intersects the first leeward supporting means (220, 420, 520, 720, 1020).
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