Rotor blade extension portion having a skin located over a framework
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-027/615
F03D-011/00
출원번호
US-0231611
(2008-09-03)
등록번호
US-8393865
(2013-03-12)
우선권정보
GB-0814107.9 (2008-08-01)
발명자
/ 주소
Vronsky, Tomas
Hancock, Mark
출원인 / 주소
Vestas Wind Systems A/S
대리인 / 주소
Wood, Herron & Evans, LLP
인용정보
피인용 횟수 :
4인용 특허 :
13
초록▼
A wind turbine rotor blade extension portion having a permanent framework with one or more chord-wise members and a substantially span-wise member. A membrane is located over the framework to thereby generate a streamlined surface. The extension portion is configured to transmit aerodynamic loads fr
A wind turbine rotor blade extension portion having a permanent framework with one or more chord-wise members and a substantially span-wise member. A membrane is located over the framework to thereby generate a streamlined surface. The extension portion is configured to transmit aerodynamic loads from the membrane, along the chord-wise members to a rotor blade to which the extension portion is connected, in use.
대표청구항▼
1. A wind turbine rotor blade extension portion, comprising: a permanent framework, having one or more chord-wise members and a substantially span-wise member;a skin located over the framework to thereby generate a streamlined surface, wherein the extension portion comprises a first surface and a se
1. A wind turbine rotor blade extension portion, comprising: a permanent framework, having one or more chord-wise members and a substantially span-wise member;a skin located over the framework to thereby generate a streamlined surface, wherein the extension portion comprises a first surface and a second surface, the first and second surfaces being spaced from one another at a proximal region of the extension portion and connected to one another at a distal region of the extension portion, wherein the extension portion is configured to transmit aerodynamic loads exerted on the skin, along the chord-wise members to a trailing portion of a rotor blade to which the extension portion is connected, in use, and wherein the substantially span-wise member is positioned at the distal region where the first and second surfaces are connected to each other; anda further span-wise member, located at one of a leading edge of the first surface and a leading edge of the second surface. 2. The extension portion according to claim 1, wherein the skin is a stretchable membrane. 3. The extension portion according to claim 1, wherein the chord-wise members of the permanent framework are connected to the substantially span-wise member at a trailing edge of the extension portion. 4. The extension portion according to claim 1, wherein the members of the framework comprise one of the group of fibre reinforced polymer, wood and metal. 5. The extension portion according to claim 1, wherein the skin comprises a fibre reinforced polymer. 6. The extension portion according to claim 5, wherein the fibre reinforced polymer is one of the group of glass fibre reinforced polymer (GFRP), para-aramid (aromatic polyamide) fibre reinforced polymer and carbon fibre reinforced polymer (CFRP). 7. The extension portion according to claim 1, wherein the members of the framework are bonded to the skin. 8. The extension portion according to claim 1, wherein the skin comprises a pocket configured to receive a member of the framework. 9. The extension portion according to claim 1, wherein a connection member is provided between the first surface and the second surface to control the separation of the first surface from the second surface. 10. The extension portion according to claim 9, wherein the connection member comprises one of the group of a cable, a membrane web and a strut. 11. The extension portion according to claim 10, wherein the connection member is connected to the skin at the first surface and the skin at the second surface. 12. The extension portion according to claim 10, wherein the connection member is connected between chord-wise members that respectively support the first surface and the second surface. 13. The extension portion according to claim 1, wherein the, or each, further span-wise member is bonded to the, or each, respective leading edge. 14. The extension portion according to claim 1, wherein the, or each, further span-wise member is received by a pocket formed in a leading edge of the skin of one of the first and second surfaces. 15. The extension portion according to claim 1, wherein the skin is a flaccid membrane stretched over the framework. 16. The extension portion according to claim 15, wherein the flaccid membrane is held under tension. 17. A wind turbine rotor blade, comprising: a structurally coherent blade portion, comprising: a leading portion configured to receive wind incident on the rotor blade; anda trailing portion, located downstream of the leading portion and configured to smoothly convey fluid passing thereover from the leading portion, wherein a root region of the blade portion is configured to be connectable to a hub of a wind turbine and the blade portion is configured to smoothly transfer loads experienced thereby to the root region of the blade portion for transfer to the hub; andan extension portion configured to be appendable to a root region of the trailing portion of the blade portion, comprising: a permanent framework, having one or more chord-wise members and a substantially span-wise member;a skin located over the framework to thereby generate a streamlined surface, wherein the extension portion comprises a first surface and a second surface, the first and second surfaces being spaced from one another at a proximal region of the extension portion and connected to one another at a distal region of the extension portion, wherein the extension portion is configured to transmit aerodynamic loads exerted on the skin, along the chord-wise members to a trailing portion of a rotor blade to which the extension portion is connected, in use, and wherein the substantially span-wise member is positioned at the distal region where the first and second surfaces are connected to each other; anda further span-wise member, located at one of a leading edge of the first surface and a leading edge of the second surface. 18. The rotor blade according to claim 17, wherein the extension portion is appended to a root region of the trailing portion. 19. The rotor blade according to claim 18, wherein the blade portion comprises a truncated profile, whereby the root region of the trailing portion of the blade portion is configured to receive the extension portion. 20. The rotor blade according to claim 17, wherein the blade portion is a wind turbine rotor blade. 21. A wind turbine installation comprising a rotor hub supported by a tower, the installation comprising a rotor blade according to claim 17, appended to the rotor hub.
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이 특허에 인용된 특허 (13)
Mosiewicz Antonio (Milan ITX), Axial propeller with increased effective displacement of air whose blades are not twisted.
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