Variable diameter and angle vertical axis turbine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F03D-007/06
H02K-007/18
F03D-003/00
F03D-003/06
출원번호
US-0232629
(2012-07-12)
등록번호
US-10218246
(2019-02-26)
국제출원번호
PCT/IB2012/053567
(2012-07-12)
§371/§102 date
20140114
(20140114)
국제공개번호
WO2013/008200
(2013-01-17)
발명자
/ 주소
Farb, Daniel
Farkash, Avner
출원인 / 주소
Farb, Daniel
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A wind turbine, particularly vertical axis, whose diameter is extensible and retractable, either from the length of the arms or the angle of the blades, or both, has advantages in operating in low wind speed regimes and surviving in high wind speed, regimes. The current application describes how to
A wind turbine, particularly vertical axis, whose diameter is extensible and retractable, either from the length of the arms or the angle of the blades, or both, has advantages in operating in low wind speed regimes and surviving in high wind speed, regimes. The current application describes how to construct such a turbine, particularly the control mechanisms and the optimal aerodynamic configurations of the blades.
대표청구항▼
1. A vertical axis turbine, comprising: a plurality of blades;a central shaft in communication with each blade of the plurality of blades;each said blade comprising: a substantially semicircular body including a leading side and a trailing side between oppositely disposed internal and external edges
1. A vertical axis turbine, comprising: a plurality of blades;a central shaft in communication with each blade of the plurality of blades;each said blade comprising: a substantially semicircular body including a leading side and a trailing side between oppositely disposed internal and external edges, each said blade being concave on the trailing side, and convex on the leading side; and,wherein each said blade is of a diameter of a length d based on the diameter of the arc of the blade from the internal edge to the external edge, and the internal edge is a predetermined distance of a length p from the central shaft, wherein airspace is present between the internal edge and the shaft, and the internal edge does not overlap the shaft, such that the ratio of the length of d to p is 13:6 with a variation of 20% in each said lengths d and p of the ratio. 2. The turbine of claim 1, wherein each said blade includes a horizontal axis which is oriented at a blade angle, defined according to a 360-degree circle, with positive in the counterclockwise direction from the horizontal, from approximately the middle of each said blade along the internal edge to the central shaft, and the angle from the internal to external edge is in the range of approximately +45 to +90 degrees and +270 to +315 degrees, which is defined as a high efficiency configuration, and wherein other values are defined as a low efficiency configuration. 3. The turbine of claim 2, further comprising: a pivot to change the blade angle from a high efficiency configuration to a low efficiency configuration. 4. The turbine of claim 1, wherein each of said blades are of a double-curve shape and adjacent to at least one of a top edge and a bottom edge of each said blade. 5. The turbine of claim 1, wherein a tip speed ratio (TSR) for each said blade is between 0 and 1.4. 6. The turbine of claim 1, wherein the plurality of blades includes at least two blades. 7. The turbine of claim 1, wherein the plurality of blades includes at least three blades. 8. The turbine of claim 1, wherein each of the blades are movable inward from the predetermined distance p to a second distance closer to the central shaft less than p. 9. The turbine of claim 1, wherein the external edge of each of said blades is movable inward along an axis proximate to the central shaft. 10. The turbine of claim 1, further comprising a pivot in communication with the central shaft and the at least one blade, the pivot configured for adjusting the turbine diameter by moving the at least one blade, with respect to the central shaft, between an inward position and an outward position, such that the movement between the inward position and the outward position changes the turbine diameter along the axis perpendicular to the central shaft. 11. The system of claim 10, wherein the pivot comprises: a motor disc in communication with the central shaft,a rotating arm in communication with the motor disc and the at least one blade, and,a slide arm in communication with the motor disc and the at least one blade. 12. The system of claim 10, wherein the pivot comprises: a drive disc in communication with the central shaft,a driven disc in communication with the at least one blade,a connecting arm in communication with the drive and the driven disc. 13. The system of claim 10, wherein the pivot comprises: a drive disc in communication with the central shaft,a driven disc in communication with the at least one blade,a chain operatively coupling the drive to the driven disc, and,a tension gear in communication with the drive shaft and the chain. 14. The system of claim 10, wherein said pivot folds the external edge of the at least one blade towards the central shaft. 15. The turbine of claim 10, wherein said pivot comprises a moveable arm attached to the internal edge of the blade, and to the central shaft. 16. The turbine of claim 10, further comprising: a processor based controller for controlling at least one of: positioning, angular orienting, and rotational speed, of the at least one blade. 17. A method of changing the angle of attack of a plurality of blades of a vertical axis wind turbine comprising: providing at least one blade in communication with a central shaft, the at least one blade rotatable about an axis of rotation, the axis of rotation being parallel to the central shaft, the at least one blade including an internal edge and an external edge;each said blade comprising:a substantially semicircular body including a leading side and a trailing side between oppositely disposed internal and external edges, each said blade being concave on the trailing side, and convex on the leading side; and,wherein each said blade is of a diameter of a length d based on the diameter of the arc of the blade from the internal edge to the external edge, and the internal edge is a predetermined distance of a length p from the central shaft, wherein airspace is present between the internal edge and the shaft, and the internal edge does not overlap the shaft, such that the ratio of the length of d to p is 13:6 with a variation of 20% in each said lengths d and p of the ratio and,a pivot in communication with the central shaft and the at least one blade, the pivot configured for adjusting the turbine diameter by moving the at least one blade, with respect to the central shaft, between an inward position and an outward position, such that the movement between the inward position and the outward position changes the turbine diameter along the axis parallel to the central shaft; and,adjusting the angle of the at least one blade to accommodate varying wind speeds. 18. The method of claim 17, wherein the pivot folds the external edge of the at least one blade in the direction of a trailing side. 19. The method of claim 17, wherein angle of attack and a Tip Speed Ratio (TSR) are adjusted simultaneously. 20. The method of claim 17, wherein the diameter of the turbine from external edge to external edge is reduced in higher wind speeds above a predetermined wind speed.
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이 특허에 인용된 특허 (10)
Borg John L. ; Morisseau Kenneth C., Modified savonius rotor.
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