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US 7,344,353 B2Granted
Helical wind turbine
AssigneeArrowind Corporation
InventorsPertti H. Naskali, Angus MacLean, Neil C. C. Gray, J. Harry Lewis, A. Patrick Newall
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AssigneeArrowind Corporation
InventorsPertti H. Naskali, Angus MacLean, Neil C. C. Gray, J. Harry Lewis, A. Patrick Newall
Estimating the term…
A vertical axis wind turbine wherein the blades of the rotor section of the wind turbine comprise at least sections wherein the blades have a non-linear configuration in the “z” axis. In a preferred embodiment, the blades of the rotor section have a linear trailing edge with a non-linear, and preferably helical, surface configuration. This particular design allows the blades to provide both a rotational force and a positive or negative lift component. Further, the blades define an open area in the center of the rotor section through which air flow can pass in order to create a vertical vortex of air. As such, a more efficient vertical axis wind turbine provided.
A vertical axis wind turbine having a base structure and a rotor section comprising at least two blades for collection of wind energy, a lower support brace attached to the lower end of each blade, an upper support brace attached to the upper end of each blade, an axle for rotation of said rotor section which axle is affixed to said lower support brace and is used to operatively connect said rotor section to said base structure, wherein at least a portion of said blades have a non-linear design so as to provide both a rotation and lifting force on said rotor section as a result of wind impacting said wind turbine, and wherein each of said blades comprises a linear trailing edge and a helical surface configuration.
A vertical axis wind turbine having a base structure and a rotor section comprising at least two blades for collection of wind energy, a lower support brace attached to the lower end of each blade, an upper support brace attached to the upper end of each blade, an axle for rotation of said rotor section which axle is affixed to said lower support brace and is used to operatively connect said rotor section to said base structure, wherein at least a portion of said blades have a non-linear design so as to provide both a rotation and lifting force on said rotor section as a result of wind impacting said wind turbine, and wherein any or all of said blades comprise a means for adjusting the drag coefficient on either or both sides of said blades.
A vertical axis wind turbine having a base structure and a rotor section comprising at least two blades for collection of wind energy, a lower support brace attached to the lower end of each blade, an upper support brace attached to the upper end of each blade, an axle for rotation of said rotor section which axle is affixed to said lower support brace and is used to operatively connect said rotor section to said base structure, wherein at least a portion of said blades have a non-linear design so as to provide both a rotation and lifting force on said rotor section as a result of wind impacting said wind turbine, and additionally comprising a series of magnets to provide positive or negative lift to said rotor section.
A rotor section for use in a vertical axis wind turbine rotor, which rotor section is adapted to be fitted into a vertical axis wind turbine base section, comprising at least two blades for collection of wind energy, a lower support brace attached to the lower end of each blade, an upper support brace attached to the upper end of each blade, an axle for rotation of said rotor section which axle is affixed to said lower support brace and is adapted to be used to operatively connect said rotor section to said base structure, wherein at least a portion of said blades have a non-linear design so as to provide both a rotation and lifting force on said rotor section as a result of wind impacting said wind turbine and wherein each of said blades comprises a linear trailing edge and a helical surface configuration.
Dependencies are inferred from the claim text.