Windmill rotor

Details Windmill rotor Windmill rotor

1984-10-29

1985-09-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Cupped reaction surface normal to rotation plane

Torque converters

416227A, 98 72, F03D 306

Patent

active

045430420

ABSTRACT:
A windmill rotor of the vertical axis type having at least three main blades mounted symmetrically around a shaft and bowing outwardly to define a generally sphere-like chamber. Each main blade has a secondary blade mounted on its inner surface, and the secondary blade is movable under centrifugal force as the rotor turns. An auxiliary blade is provided adjacent to and ahead of the secondary blade to act as a scoop for the wind to provide the rotor with additional thrust at low speed. The auxiliary blade is positioned so that, as the speed of the rotor increases and the secondary blade moves outwardly, the scoop formed by the auxiliary blade is shielded from the wind, thus reducing or eliminating the additional thrust at high rotational speeds. The avoids damage to the rotor in high winds.

REFERENCES:
patent: 227842 (1880-05-01), Rudolph
patent: 725829 (1903-04-01), Decker
patent: 1413861 (1922-04-01), McDowell
patent: 1706163 (1929-03-01), Howe
patent: 1766765 (1930-06-01), Savonius
patent: 2518611 (1950-08-01), Geiger
patent: 3267833 (1966-08-01), Artis et al.
patent: 3918839 (1975-11-01), Blackwell et al.
patent: 4020565 (1977-05-01), Steffen
patent: 4115032 (1978-09-01), Lange
patent: 4408956 (1983-10-01), Price

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