Patent ID: 7071578
Filing Date: 2006-07-04
Classification: F03D,F05B,Y02E,Y10S

Abstract:
1. A wind turbine with an active annular plane area control mechanism comprising a plurality of blades attached to a rotor for transmitting the wind force acting on the blades to the output shaft of the wind turbine connected to the rotor, wherein said rotor is formed in a cylindrical shape, said blades are attached to said rotor movable in the radial direction of the rotor, a blade shifting mechanism is connected to the roots of said blades for reciprocating said blades in the radial direction, and an active annular plane area is changeable by moving said blades in the radial direction through said blade shifting mechanism, wherein said rotor has radial fit holes located at an equal spacing in the circumferential direction, said blades are received in said radial fit holes for reciprocation, and said blade shifting mechanism is provided in the hollow of said rotor, and wherein said blade shifting mechanism comprises a plurality of screw bars received for rotation in radial holes provided in the cylindrical wall of said rotor, sleeves each of which is engaged with each of the screw bars, links each of which connects each of said sleeves and said blades, pinions each of which is fixed to each of said screw bars at the inner side part thereof, and a driving gear meshing with said pinions and driven by a driving device; and said blades are reciprocated in the radial direction through the expansion or contraction of said links resulting from the shifting of said sleeves by the rotation of said screw bars when said driving gear is rotated by said driving device.