Wind turbine with automatic pitch and yaw control

Details Wind turbine with automatic pitch and yaw control Wind turbine with automatic pitch and yaw control

1976-08-17

1978-04-11

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With gyroscopic reference means for rotor control

416139, 416141, F03D 704

Patent

active

040836517

ABSTRACT:
A wind turbine having a flexible central beam member supporting aerodynamic blades at opposite ends thereof and fabricated of uni-directional high tensile strength material bonded together into beam form so that the beam is lightweight, and has high tensile strength to carry the blade centrifugal loads, low shear modulus to permit torsional twisting thereof for turbine speed control purposes, and adequate bending stiffness to permit out-of-plane deflection thereof for turbine yard control purposes. A selectively off-set weighted pendulum member is pivotally connected to the turbine and connected to the beam or blade so as to cause torsional twisting thereof in response to centrifugal loading of the pendulum member for turbine speed control purposes.

REFERENCES:
patent: 2791281 (1957-05-01), Boyd
patent: 3874816 (1975-04-01), Sweeney et al.
patent: 3880551 (1975-04-01), Kisovec
patent: 3999886 (1976-12-01), Ormiston et al.
patent: 4025230 (1977-05-01), Kasyan
Machine Design; vol. 48, No. 12; May 20, 1976, (pp. 18-20, 23-26).

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