IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0397294
(2012-02-15)
|
등록번호 |
US-8734110
(2014-05-27)
|
발명자
/ 주소 |
- Kuroiwa, Takao
- Fujioka, Hideyasu
|
출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
|
대리인 / 주소 |
Kanesaka Berner & Partners, LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
12 |
초록
▼
A wind turbine blade having a lightning protection function includes an outer shell, a spar arranged in a space inside the outer shell, a spar cap which is formed by a carbon-fiber plastic laminated member disposed on a blade root side and a glass-fiber plastic laminated member disposed on a blade t
A wind turbine blade having a lightning protection function includes an outer shell, a spar arranged in a space inside the outer shell, a spar cap which is formed by a carbon-fiber plastic laminated member disposed on a blade root side and a glass-fiber plastic laminated member disposed on a blade tip side that are connected together, the spar cap supporting the spar to the outer shell, and a lightning protection unit. The lightning protection unit includes a receptor for receiving lightning which is provided in the outer shell on a side where the glass-fiber plastic laminated member is arranged, a down conductor which directs lightning current received by the receptor into the ground or the water, and a conductive metal member which covers the outer shell on a side where the carbon fiber plastic laminated member is arranged.
대표청구항
▼
1. A wind turbine blade having a lightning protection function, comprising: an outer shell;a spar arranged in a space inside the outer shell and extends in a longitudinal direction of the blade;a spar cap which is formed by a carbon-fiber plastic laminated member disposed on a blade root side and a
1. A wind turbine blade having a lightning protection function, comprising: an outer shell;a spar arranged in a space inside the outer shell and extends in a longitudinal direction of the blade;a spar cap which is formed by a carbon-fiber plastic laminated member disposed on a blade root side and a glass-fiber plastic laminated member disposed on a blade tip side that are connected together, said spar cap supporting the spar to the outer shell; anda lightning protection unit comprising: a receptor for receiving lightning which is provided in the outer shell on a side where the glass-fiber plastic laminated member is arranged;a down conductor which directs lightning current received by the receptor into at least one of ground or water;a conductive metal member which covers a first part of the outer shell on the blade root side where the carbon fiber plastic laminated member is arranged but which does not cover a second part of the outer shell on the blade tip side where the glass-fiber plastic laminate member is arranged; anda base plate configured to support the receptor and disposed in a space surrounded by the second part of the outer shell on the blade tip side,wherein the receptor is installed in the second part of the outer shell on the blade tip side in such a manner that the receptor is exposed at an outer surface of the wind turbine blade,wherein the receptor is electrically connected to the down conductor via the base plate, the down conductor extends from the blade tip side toward the blade root side so as to direct the lightning current received by the receptor toward the ground or water, andwherein the conductive metal member is electrically connected to at least one of the down conductor or the base plate. 2. The wind turbine blade according to claim 1, wherein the glass-fiber plastic laminated member is connected to the carbon-fiber plastic laminated member at a connection part which is arranged at ⅛ to ½ of an entire length of the wind turbine blade from a blade tip, the carbon-fiber plastic laminated member being arranged on the blade root side of the connection part. 3. The wind turbine blade according to claim 1, wherein the receptor is a conductive disc receptor which is embedded in a vicinity of a blade tip of the wind turbine blade. 4. The wind turbine blade according to claim 1, wherein the receptor is a conductive disc receptor which is provided in a surface of the wind turbine blade between a blade tip and a blade root. 5. The wind turbine blade according to claim 4, wherein a plurality of the disc receptors are embedded on a pressure side and a suction side of the wind turbine blade, the plurality of the disc receptors being connected to the base plate, andwherein the base plate electronically connects the plurality of the disc receptors to the down conductor. 6. The wind turbine blade according to claim 4, wherein the down conductor is arranged in a tower supporting a hub to which the wind turbine blade is connected and allows the lightning current received by the disc receptors to flow into ground or water, andwherein the disc receptors and the base plate are connected to the down conductor so that heat expansion and heat shrink is absorbed. 7. The wind turbine blade according to claim 6, wherein the down conductor is connected to one of the base plate and the disc receptors via a heat shrinkable tube which is conductive. 8. The wind turbine blade according to claim 1, wherein the down conductor is arranged along the spar. 9. The wind turbine blade according to claim 8, wherein the down conductor is attached on a surface of a shear web via a fixing member in a region where the shear web exists, whereas the down conductor is provided along an inner surface of the outer shell. 10. The wind turbine blade according to claim 1, wherein a plurality of the receptors are provided, the plurality of the receptors including a rod receptor,wherein the rod receptor is formed by a base part and a lightning receiving part,wherein the base part is arranged in the space inside the outer shell in such a state that the base part is fixed to the base plate, andwherein the outer shell of the wind turbine blade is cut at a blade tip to form an opening at the blade tip, andwherein the lightning receiving part and the base part are coupled by inserting the lightning receiving part in the opening. 11. The wind turbine blade according to claim 10, wherein the rod receptor and the base plate are coupled together by a conductive fastening member. 12. The wind turbine blade according to claim 1, wherein an abutting position of a connection part between the carbon-fiber plastic laminated member and the glass-fiber plastic laminated member changes gradually in a thickness direction of the wind turbine blade. 13. The wind turbine blade according to claim 1, wherein the spar cap is formed by respectively stacking carbon-fiber plastic layers and glass-fiber plastic layers and impregnating the stacked layers with resin to form an integral piece using vacuum impregnation. 14. A wind turbine blade having a lightning protection function, comprising: an outer shell;a spar arranged in a space inside the outer shell and extends in a longitudinal direction of the blade;a spar cap which is formed by a carbon-fiber plastic laminated member disposed on a blade root side and a glass-fiber plastic laminated member disposed on a blade tip side that are connected together, said spar cap supporting the spar to the outer shell; anda lightning protection unit comprising:a receptor for receiving lightning which is provided in the outer shell on a side where the glass-fiber plastic laminated member is arranged;a down conductor which directs lightning current received by the receptor into at least one of ground or water; anda conductive metal member which covers the outer shell on the blade root side where the carbon fiber plastic laminated member is arranged; anda base plate configured to support the receptor and disposed in a space surrounded by the outer shell on the blade tip side,wherein the receptor is attached to the outer shell on the blade tip side in such a manner that the receptor is exposed at an outer surface of the outer shell on the blade tip side, andwherein the receptor is electrically connected to the down conductor via the base plate, the down conductor extends from the blade tip side toward the base root side so as to direct the lightning current received by the receptor toward the ground or water, and the conductive metal member is electrically connected to the down conductor or the base plate; andwherein the down conductor is attached on a surface of a shear web via a fixing member in a region where the shear web exists, whereas the down conductor is provided along an inner surface of the outer shell.
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