[특허]Horizontal-axis hydrokinetic water turbine system

DLZ Corporation

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Horizontal-axis hydrokinetic water turbine system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F03B-013/10 F03B-013/12
미국특허분류(USC)	290/053; 290/054
출원번호	US-0191537 (2011-07-27)
등록번호	US-8525363 (2013-09-03)
발명자 / 주소	Rajadhyaksha, Vikram V. Huff, Roger Sam Cherian, Mookencheril P.
출원인 / 주소	DLZ Corporation
대리인 / 주소	Porter, Wright, Morris & Arthur, LLP
인용정보	피인용 횟수 : 5 인용 특허 : 18

초록
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A hydrokinetic water turbine system includes a frame structure, first and second shafts rotatably supported by the frame structure, and first and second rotors secured to the first and second shafts respectively and each having a plurality of spaced-apart blades so that the flowing stream of water revolves the first and second rotors about a central axis of the first and second shafts respectively. The first and second shafts are horizontally-disposed and coaxial and the first and second rotors are adapted to rotate in opposite directions. The blades are hollow and filled with a foam material to reduce weight and increase buoyancy. The frame structure is a substantially rectangular and open frame structure and includes frame members adapted to reduce a coefficient of drag of the frame structure. The frame members can be hollow and filled with a foam material to reduce weight and increase buoyancy.

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1. A hydrokinetic water turbine system configured to be placed in a flowing stream of water, said water turbine system comprising, in combination: a frame structure; a shaft supported by the frame structure to rotate about a horizontally-disposed central axis of the shaft;a rotor secured to the shaft and having a first plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft and a second plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft so that the flowing stream of water revolves the rotor about the central axis of the shaft;wherein the first and second plurality of blades are each rigidly secured to prevent relative movement between the blades;wherein the first and second plurality blades are each straight in the longitudinal direction and have a hydrofoil shape in cross section configured to generate lift and rotate the rotor about the horizontally disposed central axis as the flowing stream of water passes around the hydrofoil shape;wherein the second plurality of blades is spaced apart from the first plurality of blades in the longitudinal direction and offset from the first plurality of blades so that the second plurality of blades is circumferentially located between the first plurality of blades for smooth rotation of the rotor; andwherein the first and second plurality of blades are hollow extrusions with internal ribs between hollow cavities and the hollow cavities are filled with a material having a weight less than a weight of a material forming the extrusions. 2. The hydrokinetic water turbine system according to claim 1, wherein the rotor includes longitudinally spaced-apart support discs fixed to the shaft and the blades extend between the support discs and are rigidly secured to the support discs. 3. The hydrokinetic water turbine system according to claim 1, further comprising an electric power generator coupled to the shaft. 4. The hydrokinetic water turbine system according to claim 1, wherein the hollow cavities are filled with a foam material. 5. The hydrokinetic water turbine system according to claim 1, wherein the hollow extrusions are aluminum extrusions. 6. The hydrokinetic water turbine system according to claim 1, wherein the first plurality of blades comprises at least four blades and the second plurality of blades comprises at least four blades. 7. The hydrokinetic water turbine system according to claim 1, wherein the frame structure comprises a substantially rectangular open structure. 8. The hydrokinetic water turbine system according to claim 7, wherein the frame structure comprises a plurality of frame members and the frame members are hollow extrusions having hollow cavities and the hollow cavities are filled with a foam material. 9. The hydrokinetic water turbine system according to claim 8, wherein the frame members are hydrofoils to reduce the coefficient of drag of the frame structure. 10. The hydrokinetic water turbine system according to claim 1, further comprising an electric power generator supported by the frame structure above the flowing stream of water and coupled to the shaft with a chain and sprocket assembly. 11. A hydrokinetic water turbine system configured to be placed in a flowing stream of water, said water turbine system comprising, in combination: a substantially rectangular and open frame structure; a shaft supported by the frame structure to rotate about a horizontally-disposed central axis of the shaft;a rotor secured to the shaft and having a first plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft and a second plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft so that the flowing stream of water revolves the rotor about the central axis of the shaft;wherein the first and second plurality of blades are each rigidly secured to prevent relative movement between the blades;wherein the first and second plurality blades are each straight in the longitudinal direction and have a hydrofoil shape in cross section configured to generate lift and rotate the rotor about the horizontally disposed central axis as the flowing stream of water passes around the hydrofoil shape;wherein the second plurality of blades is spaced apart from the first plurality of blades in the longitudinal direction and offset from the first plurality of blades so that the second plurality of blades is circumferentially located between the first plurality of blades for smooth rotation of the rotor;wherein the first and second plurality of blades are hollow extrusions with internal ribs between hollow cavities and the hollow cavities are filled with a material having a weight less than a weight of a material forming the extrusions; andwherein the frame structure comprises frame members adapted to reduce the coefficient of drag of the frame structure. 12. The hydrokinetic water turbine system according to claim 11, wherein the frame members are hollow extrusions having hollow cavities and the hollow cavities are filled with a foam material. 13. The hydrokinetic water turbine system according to claim 11, wherein the hollow frame members comprise aluminum extrusions. 14. The hydrokinetic water turbine system according to claim 11, wherein at least a portion of the frame members are hydrofoils to reduce a coefficient of drag of the frame structure. 15. The hydrokinetic water turbine system according to claim 14, wherein the frame members which are hydrofoils extend in a direction substantially perpendicular to the flow stream of water. 16. The hydrokinetic water turbine system according to claim 11, wherein at least a portion of the frame members have substantially bullet-shaped ends to reduce a coefficient of drag of the frame structure. 17. The hydrokinetic water turbine system according to claim 16, wherein the frame members which have substantially bullet-shaped ends extend in a direction substantially parallel to the flow stream of water. 18. The hydrokinetic water turbine system according to claim 11, wherein the rotor includes longitudinally spaced-apart support discs fixed to the shaft and the blades extend between the support discs and are rigidly secured to the support discs. 19. The hydrokinetic water turbine system according to claim 11, wherein the hollow cavities of the blades are filled with a foam material. 20. The hydrokinetic water turbine system according to claim 11, further comprising an electric power generator supported by the frame structure and coupled to the shaft. 21. A hydrokinetic water turbine system configured to be placed in a flowing stream of water, said water turbine system comprising, in combination: a first hydrokinetic assembly comprising: a frame structure;a shaft supported by the frame structure to rotate about a horizontally-disposed central axis of the shaft;a rotor secured to the shaft and having a first plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft and a second plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft so that the flowing stream of water revolves the rotor about the central axis of the shaft;wherein the first and second plurality of blades are each rigidly secured to prevent relative movement between the blades;wherein the first and second plurality blades are each straight in the longitudinal direction and have a hydrofoil shape in cross section configured, to generate lift and rotate the rotor about the horizontally disposed central axis as the flowing stream of water passes around the hydrofoil shape;wherein the second plurality of blades is spaced a art from the first plurality of blades in the longitudinal direction and offset from the first plurality of blades so that the second plurality of blades is circumferentially located between the first plurality of blades for smooth rotation of the rotor; andwherein the first and second plurality of blades are hollow extrusions with internal ribs between hollow cavities and the hollow cavities are filled with a material having a weight less than a weight of a material forming the extrusions;a second hydrokinetic assembly comprising: a frame structure;a shaft supported by the frame structure to rotate about a horizontally-disposed central axis of the shaft;a rotor secured to the shaft and having a third plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft and a fourth plurality of spaced-apart blades extending parallel to the central axis of the shaft and circumferentially spaced-apart about the shaft so that the flowing stream of water revolves the rotor about the central axis of the shaft;wherein the third and fourth plurality of blades are each rigidly secured to prevent relative movement between the blades;wherein the third and fourth plurality blades are each straight in the longitudinal direction and have a hydrofoil shape in cross section configured to generate lift and rotate the rotor about the horizontally disposed central axis as the flowing stream of water passes around the hydrofoil shape;wherein the fourth plurality of blades is spaced apart from the third plurality of blade in the longitudinal direction and offset from the third plurality of blades so that the fourth plurality of blades is circumferentially located between the third plurality of blades for smooth rotation of the rotor; andwherein the third and fourth plurality of blades are hollow extrusions with internal ribs between hollow cavities and the hollow cavities are filled with a material having a weight less than a weight of a material forming the extrusions;wherein the shafts of the first and second hydrokinetic assemblies are coaxial and the rotors of the first and second hydrokinetic assemblies are adapted to rotate in opposite directions. 22. The hydrokinetic water turbine system according to claim 21, wherein each of the rotors includes longitudinally spaced-apart support discs fixed to the respective shaft and the respective blades extend between the support discs and are rigidly secured to the support discs. 23. The hydrokinetic water turbine system according to claim 21, wherein the hollow extrusions are aluminum extrusions. 24. The hydrokinetic water turbine system according to claim 21, wherein the hollow cavities are filled with a foam material. 25. The hydrokinetic water turbine system according to claim 21, wherein each of the frame structures comprise a substantially rectangular open structure. 26. The hydrokinetic water turbine system according to claim 25, wherein each of the frame structures comprise frame members adapted to reduce the coefficient of drag of the frame structure. 27. The hydrokinetic water turbine system according to claim 26, wherein at least a portion of the frame members are hydrofoils to reduce the coefficient of drag of the frame structure. 28. The hydrokinetic water turbine system according to claim 26, wherein at least a portion of the frame members have substantially bullet-shaped ends to reduce the coefficient of drag of the frame structure. 29. The hydrokinetic water turbine system according to claim 21, wherein each of the frame structures comprise a plurality of frame members and the frame members are hollow extrusions having hollow cavities and the hollow cavities are filled with a foam material. 30. The hydrokinetic water turbine system according to claim 21, wherein the first hydrokinetic assembly further comprises an electric power generator supported by the frame structure and coupled to the shaft and wherein the second hydrokinetic assembly further comprises an electric power generator supported by the frame structure and coupled to the shaft.

이 특허에 인용된 특허 (18)

이 특허를 인용한 특허 피인용횟수: 5

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Horizontal-axis hydrokinetic water turbine system

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Horizontal-axis hydrokinetic water turbine system

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