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US 5,354,175 AGranted
Wind turbine rotor hub and teeter joint
AssigneeNorthern Power Systems, Inc.
InventorsClint Coleman, William T. Kurth, Joseph Jankowski
Life of this patent
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AssigneeNorthern Power Systems, Inc.
InventorsClint Coleman, William T. Kurth, Joseph Jankowski
Estimating the term…
A rotor hub is provided for coupling a wind turbine rotor blade and a shaft. The hub has a yoke with a body which is connected to the shaft, and extension portions which are connected to teeter bearing blocks, each of which has an aperture. The blocks are connected to a saddle which envelops the rotor blade by one or two shafts which pass through the apertures in the bearing blocks. The saddle and blade are separated by a rubber interface which provides for distribution of stress over a larger portion of the blade. Two teeter control mechanisms, which may include hydraulic pistons and springs, are connected to the rotor blade and to the yoke at extension portions. These control mechanisms provide end-of-stroke damping, braking, and stiffness based on the teeter angle and speed of the blade.
A wind turbine comprising:
An active teeter control system for a wind turbine, wherein said turbine comprises a rotor blade and a shaft, said blade and said shaft connected by a rotor hub at a central portion of said rotor blade, said rotor blade having at least two outer blade portions, one on either side of said central portion, said outer portions teetering at a teeter angle and rotating at a speed, said system comprising:
An active teeter control system for a wind turbine, wherein said turbine comprises a rotor blade and a shaft, said blade and said shaft connected by a rotor hub at a central portion of said rotor blade, said rotor blade having at least two outer blade portions, one on either side of said central portion, said outer portions teetering at a teeter angle and rotating at a speed, said system comprising:
Dependencies are inferred from the claim text.