Blade for windmill, windmill and wind power generator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-009/04
F03D-009/00
출원번호
US-0227944
(2006-06-02)
등록번호
US-8198747
(2012-06-12)
국제출원번호
PCT/JP2006/311128
(2006-06-02)
§371/§102 date
20081202
(20081202)
국제공개번호
WO2007/141834
(2007-12-13)
발명자
/ 주소
Kato, Masaharu
출원인 / 주소
Eco Technology Co., Ltd.
대리인 / 주소
Thomas, Kayden, Horstemeyer & Risley, LLP
인용정보
피인용 횟수 :
1인용 특허 :
7
초록▼
A blade for a windmill disposed around a rotation center (M) in a vertical direction so as to receive wind force, comprising a front surface (26) including; a front nose surface (26F) being disposed at front of a traveling direction, also having a greatest average curvaturea low speed airflow passin
A blade for a windmill disposed around a rotation center (M) in a vertical direction so as to receive wind force, comprising a front surface (26) including; a front nose surface (26F) being disposed at front of a traveling direction, also having a greatest average curvaturea low speed airflow passing surface (26L) disposed on a closer side to the rotation center, and formed continuously from the front nose surface to rearward of the traveling direction, anda high speed airflow passing surface (26H) disposed a distant side from the rotation center, formed continuously from the front nose surface to rearward of the traveling direction with a curved surface swollen greater than the low speed airflow passing surface, and having length as viewed from the vertical direction greater than the low speed airflow passing surface.
대표청구항▼
1. A blade for a windmill being disposed around a rotation center in a vertical direction so as to receive wind force, wherein the edge of the blade viewed from the vertical direction is formed by: a front surface curved convexly toward a front traveling direction of rotation about the rotation cent
1. A blade for a windmill being disposed around a rotation center in a vertical direction so as to receive wind force, wherein the edge of the blade viewed from the vertical direction is formed by: a front surface curved convexly toward a front traveling direction of rotation about the rotation center, as viewed from the vertical direction; anda back surface, curved concavely toward a back traveling direction of rotation about the rotation center, being disposed on a back surface side of the blade and extending between a low speed back end portion and a high speed back end portion, the low speed back end portion being disposed closer to the rotation center than the high speed back end portion, andthe front surface includes:a front nose surface being disposed at front of the blade with respect to the front traveling direction, also having a greatest average curvature, the front nose surface including a front portion disposed at a forward-most portion of the blade with respect to the front traveling direction and closer to the rotation center than the high speed back end portion,a low speed airflow passing surface disposed on a closer side to the rotation center, and formed continuously from the front nose surface, along the back traveling direction, to the low speed back end portion, anda high speed airflow passing surface disposed on a distant side from the rotation center, formed continuously from the front nose surface, along the back traveling direction to a high speed back end portion, with a curved surface swollen greater than the low speed airflow passing surface, and having length as viewed from the vertical direction greater than the low speed airflow passing surface, andwherein, when receiving wind only from the front, the blade produces lift force including a component in the reverse direction of the wind from the front. 2. The blade for a windmill as claimed in claim 1, wherein the back surface has an arc shape having a smaller curvature than the average curvature of the front surface. 3. The blade for a windmill as claimed in claim 2, wherein the rotation center is disposed on an extension of an arc composed of the back surface, as viewed from a vertical direction. 4. A windmill provided with a rotation center in a vertical direction, and comprising a plurality of the blades around the rotation center as claimed in claim 1. 5. The windmill claimed in claim 4, comprising a wind tunnel between the blades for the windmill and the rotation center, so as to allow wind to pass through. 6. The windmill claimed in claim 4, wherein three blades for the windmill are disposed around the rotation center at an equally-spaced center angle. 7. The windmill claimed in claim 6, wherein, as viewed from a vertical direction, a traveling direction back end portion of the high speed airflow passing surface is disposed at the farthermost position form the rotation center, anda traveling direction back end portion of the low speed airflow passing surface is disposed at a closest position to the rotation center. 8. The windmill claimed in claim 5, as viewed from a vertical direction, under a definition of a first line passing through a back end of the traveling direction of the low speed airflow passing surface and the rotation center,a second line passing through a front portion of the traveling direction of the blade for the windmill and the rotation center anda third line passing through a back end of the traveling direction of the high speed airflow passing surface and the rotation center,wherein an angle .theta.2 formed between the first line and the third line is greater than an angle .theta.1 formed between the first line and the second line. 9. A wind power generator provided with the windmill claimed in claim 4. 10. The wind power generator claimed in claim 9, comprising: a first windmill comprising the windmill provided with a rotation center in a vertical direction, and having a plurality of the blades for a windmill being disposed around a rotation center in a vertical direction so as to receive wind force,a second windmill provided with a rotation center in a vertical direction, and having a plurality of the blades for a windmill being disposed around a rotation center in a vertical direction so as to receive wind force, said second windmill having a common rotation center with the first windmill, and disposed so as to rotate in a direction opposite of the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill. 11. The windmill claimed in claim 4, wherein the back surface of the blade has an arc shape having a smaller curvature than the average curvature of the front surface. 12. The windmill claimed in claim 11, further comprising: a wind tunnel between the blades for the windmill and the rotation center, so as to allow wind to pass through. 13. The windmill claimed in claim 12, as viewed from a vertical direction, under a definition of: a first line passing through a back end of the traveling direction of the low speed airflow passing surface and the rotation center,a second line passing through a front portion of the traveling direction of the blade for the windmill and the rotation center anda third line passing through a back end of the traveling direction of the high speed airflow passing surface and the rotation center, whereinan angle .theta.2 formed between the first line and the third line is greater than an angle .theta.1 formed between the first line and the second line. 14. A wind power generator provided with the windmill claimed in claim 5. 15. A wind power generator provided with the windmill claimed in claim 8. 16. The wind power generator of claim 9, comprising: a first windmill,a second windmill, having the common rotation center with the first windmill, and disposed to rotate in an opposite direction from the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with: a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill. 17. A wind power generator comprising the windmill of claim 8, said wind power generator comprising: a first windmill,a second windmill having the common rotation center with the first windmill, and disposed to rotate in an opposite direction from the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill. 18. A wind power generator comprising the windmill of claim 11, said wind power generator comprising: a first windmill,a second windmill having the common rotation center with the first windmill, and disposed to rotate in an opposite direction from the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill. 19. A wind power generator comprising the windmill of claim 12, said wind power generator comprising: a first windmill,a second windmill comprising having the common rotation center with the first windmill, and disposed to rotate in an opposite direction from the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill. 20. A wind power generator comprising the windmill of claim 13, said wind power generator comprising: a first windmill,a second windmill having the common rotation center with the first windmill, and disposed to rotate in an opposite direction from the first windmill, anda power generating device disposed between the first windmill and the second windmill, and provided with a field magnet linked with rotation of the first windmill so as to rotate in the same direction as the first windmill andan armature coil linked with rotation of the second windmill so as to rotate in the same direction as the second windmill.
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이 특허에 인용된 특허 (7)
Tangler James L. ; Somers Dan M., Airfoils for wind turbine.
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