Windmill rotor

Details Windmill rotor Windmill rotor

F - Mech Eng,Light,Heat,Weapons

03

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170/7

F03D 3/00 (2006.01) F03D 3/06 (2006.01) F03D 7/06 (2006.01)

Patent

CA 1223822

- 1 - 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 pro- vide 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. This avoids damage to the rotor in high winds.

490018

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