IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0196457
(2008-08-22)
|
등록번호 |
US-7802967
(2010-10-21)
|
발명자
/ 주소 |
- Krauss, Frenchy
- Schaller, Wolfgang P
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
14 |
초록
▼
A vertical axis wind turbine which includes a rotor having three radially extending blades spaced at even intervals about a central axis. Each radially blade having an outer edge that lies on an imaginary circle of a first diameter. Each radially extending blade including a plurality of spaced airfo
A vertical axis wind turbine which includes a rotor having three radially extending blades spaced at even intervals about a central axis. Each radially blade having an outer edge that lies on an imaginary circle of a first diameter. Each radially extending blade including a plurality of spaced airfoil sub-blades separated by gaps for the passage of air therethrough. Each of sub-blade having a leading vertical edge, and a trailing vertical edge and being positioned with the trailing vertical edge along a common radius line of the imaginary circle. Each sub-blade is skewed such that its cord line is rotated negative 45 degrees with respect the radius of the imaginary circle. The airfoil sub-blades maximize energy production by creating a secondary wind flow of a higher velocity for impingement upon blades of the rotor, and utilize backpressure during the second half of a rotation cycle to efficiently break the rotor against overspeed.
대표청구항
▼
What is claimed is: 1. A wind turbine, comprising: a rotor rotatable about a central axis, and including three radially extending blades spaced at even intervals about said central axis, each blade having an outer edge that lies on an imaginary circle of a first diameter, each radially extending bl
What is claimed is: 1. A wind turbine, comprising: a rotor rotatable about a central axis, and including three radially extending blades spaced at even intervals about said central axis, each blade having an outer edge that lies on an imaginary circle of a first diameter, each radially extending blade including a plurality of spaced sub-blades separated by gaps for the passage of air therethrough, each of said sub-blades having a leading terminal vertical edge, and a trailing terminal vertical edge, each sub-blade of each radially extending blades being positioned with said trailing terminal vertical edge along a common radius line of said imaginary circle; and wherein each sub-blade has a quarter-circular profile. 2. The wind turbine of claim 1, wherein each sub-blade has a cord line extending between said leading vertical edge and said trailing vertical edge, and wherein each sub-blade is skewed such that said chord line is rotated negative 45 degrees with respect the radius of said imaginary circle. 3. The wind turbine of claim 1, wherein said rotor further includes a central vertical support centered at a central vertical axis; and further wherein each sub-blade has a chord line extending between said leading vertical edge and said trailing terminal vertical edge, and wherein each sub-blade is skewed such that said chord line is rotated negative 45 degrees with respect the radius of said imaginary circle. 4. The wind turbine of claim 3, wherein said central vertical support has a circular cross-section with a radius of 0.1 times the diameter of said imaginary circle; and further wherein each sub-blade has a quarter-circular profile with a radius equal to said radius of said central vertical support. 5. The wind turbine of claim 4, wherein each sub-blade has a length that is approximately equal to 0.16 times the diameter of said imaginary circle. 6. The wind turbine of claim 3, wherein the spacing between said vertical terminal trailing edges of each sub-blade is equal. 7. The wind turbine of claim 3, further comprising: a means to maintain the rotational momentum of said rotor. 8. The wind turbine of claim 1, further comprising: a means to maintain the rotational momentum of said rotor. 9. A wind turbine, comprising: a rotor rotatable about a central vertical axis; said rotor including a pair of spaced horizontal plates, a vertical support centered at said central vertical axis and extending between said horizontal plates, including three radially extending blades spaced at even intervals about said central axis, each radially extending blade having an outer edge that lies on an imaginary circle of a first diameter; said central vertical support has a circular cross-section of a second diameter; each of said radially extending blades including a plurality of spaced sub-blades separated by gaps for the passage of air therethrough, each of said sub-blades having a leading terminal vertical edge, and a trailing terminal vertical edge, each sub-blade of each radially extending blades being positioned with said trailing terminal vertical edge along a common radius line of said imaginary circle, each sub-blade having a chord line extending between said leading terminal vertical edge and said trailing terminal vertical edge, and wherein each sub-blade is skewed such that said chord line is rotated negative 45 degrees with respect the radius of said imaginary circle; and wherein each sub-blade has a quarter-circular profile with a radius approximately equal to 0.01 times said diameter. 10. The wind turbine of claim 9, wherein each sub-blade has a length that is approximately equal to 0.016 times said first diameter. 11. The wind turbine of claim 9, further comprising: a means to maintain the rotational momentum of said rotor. 12. The wind turbine of claim 9, wherein said second diameter is approximately equal to 0.2 times said first diameter. 13. A wind turbine, comprising: a rotor rotatable about a central axis, and including three radially extending blades spaced at even intervals about said central axis, each blade having an outer edge that lies on an imaginary circle of a first diameter, each radially extending blade including a plurality of spaced sub-blades separated by gaps for the passage of air therethrough, each of said sub-blades having a leading terminal vertical edge, and a trailing terminal vertical edge, each sub-blade of each radially extending blades being positioned with said trailing terminal vertical edge along a common radius line of said imaginary circle; and wherein each of said sub-blades are of a shape and are arranged such that air flowing through the gaps is accelerated and directed towards the sub-blades of the preceding radially extending blade in respect to the direction of rotation of said rotor. 14. The wind turbine of claim 13, wherein each sub-blade has a chord line extending between said leading terminal vertical edge and said trailing terminal vertical edge, and wherein each sub-blade is skewed such that said cord line is rotated negative 45 degrees with respect the radius of said imaginary circle. 15. The wind turbine of claim 14, wherein said rotor further includes a central vertical support centered at said central vertical axis, said central vertical support has a circular cross-section of a second diameter; and further wherein each sub-blade has a quarter-circular profile with a radius approximately equal to 0.1 times said first diameter. 16. The wind turbine of claim 15, wherein each sub-blade has a length that is approximately equal to 0.16 times said first diameter. 17. The wind turbine of claim 16, further comprising: a means to maintain the rotational momentum of said rotor. 18. The wind turbine of claim 17, wherein said means to maintain the rotational momentum of said rotor is coupled to said rotor for rotation therewith.
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