Patent ID: 8215912
Filing Date: 2012-07-10
Classification: F03D,F05B,F16C,Y02E

Abstract:
1. A wind turbine generator, comprising: a tower standing on a foundation, a nacelle installed at an upper end of the tower, an electric generator installed in the nacelle, a wind turbine blade, a rotor head coupled to the wind turbine blade via a blade rotating ring bearing, and rotatably supported by the nacelle to be rotated by wind power to drive the electric generator to generate electricity, a pitch control mechanism configured to adjust a pitch angle of the wind turbine blade via the blade rotating ring bearing provided between the wind turbine blade and the rotor head, a grease supply and discharge assembly disposed in the rotor head, the grease supply and discharge assembly including wherein the grease discharge device includes the reservoir tank is placed near a rotation axis of the rotor head, and the vacuum pump is located in the gas portion of the reservoir tank.