Patent ID: 7011598
Filing Date: 2006-03-14
Classification: F03D,F05B,F16C,F16H,Y02E

Abstract:
1. A drive assembly for a wind turbine comprising: a wind turbine rotor hub; a supporting structure; a planetary type gear transmission unit comprising sun, planet and ring gears and a planet carrier, said ring gear being non-rotatably secured to said supporting structure; a main bearing which rotatably supports the rotor hub and planet carrier relative to said ring gear and supporting structure; and two substantially independent force transmission paths for transmission of forces reacting with forces exerted by the wind turbine rotor hub, a first of said force transmission paths acting from the rotor hub via said main bearing to the supporting structure primarily for transmission of overhang load forces and bending moment forces and a second of said force transmission paths acting from the rotor hub via said planet carrier primarily for transmission of rotational forces.