WIND TURBINE DRIVE SYSTEM

摘要

A drive system for a wind turbine having one or more blades that use wind energy to generate rotary mechanical energy to rotate a drive shaft, a generator that uses rotation of an input shaft to generate electricity, and a drive system that interconnects the drive shaft and the input shaft. The drive system includes an input gear train connectable to the drive shaft to increase the speed of rotation of the drive shaft at an output shaft, and a plurality of hydraulic circuits interposed between the input gear train and the generator. Each hydraulic circuit includes (a) an hydraulic pump coupled to the input gear train, (b) an hydraulic motor connectable to the generator input shaft, (c) an accumulator, and (d) hydraulic lines providing fluid connection between the pump, the motor, and the accumulator. The accumulator reduces high pressure pulses to reduce or eliminate ripple effects.