Speed increasing gear for wind power generation

The utility model provides a speed increasing gear for wind power generation, including low -speed level planetary gear train, intermediate speed level planetary gear train and high -speed level roller gear system, low -speed level planetary gear train and intermediate speed level planetary gear train's structure sets up the samely, and torque of low -speed level planet carrier input input transmission and initial rotational speed are provided with two low -speed level planet wheels around the low -speed level sun gear, and the low -speed level is floated the one end of shaft coupling externaltooth and is connected the other end and intermediate speed level planet carrier tooth -like connection of input with low -speed level sun gear is unsteady, the one end of the unsteady shaft couplingexternal tooth of intermediate speed level is floated with intermediate speed level sun gear and is connected, and the other end is connected with the input shaft gear that high -speed level roller gear is, high -speed level