Gearboxes are widely used in wind turbine generators. They are often used in wind turbine generators and are an important mechanical component. The main function of gearboxes is to transfer the power generated by wind turbines to wind turbines. Machine and make it get the corresponding speed. Usually, the rotational speed of the wind wheel is very low, and it is far from the rotational speed required by the generator power generation. It must be achieved through the speed-increasing effect of the gear box gear pair. Therefore, the gear box is also called a speed increase box.