Patent ID: 6790156
Filing Date: 2004-09-14
Classification: F03D,F05B,F16H,Y02E

Abstract:
A transmission for a wind generator, the transmission comprisinga housing, a rotor supported by said housing and rotatably mounted in said housing, said rotor carrying a rotor head, said rotor being supported in said housing by an outer bearing toward said rotor head and an inner bearing away from said rotor head, said rotor having a larger diameter at said outer bearing than at said inner bearing, a multi-stage planetary transmission stage driven by said rotor, said stage comprising an annular gear fixed to said rotor, at least one planetary gear on a respective at least one shaft which is supported by said housing and rotatably mounted at a fixed position in said housing, said at least one planetary gear meshing with said annular gear, a further planetary gear on each said shaft, and a sun gear mounted on a sun gear shaft, said further planetary gear meshing with said sun gear, and a spur gear stage driven by said sun gear via said sun gear shaft, said spur gear stage being arranged to drive at least one generator.