There are many types of wind turbine gearboxes. According to traditional types, they can be divided into cylindrical gearboxes, planetary gearboxes and their combined gearboxes; according to the number of transmission stages, they can be divided into single-stage and multi-stage gearboxes; According to the arrangement of rotation, it can be divided into expansion type, split flow type, coaxial type, hybrid type and so on.
The operating environment of wind turbines is very harsh and the stress conditions are complex. In addition to meeting the mechanical strength conditions, the materials used should also meet the material characteristics under extreme temperature differences, such as resistance to low temperature cold brittleness, and resistance to cold and hot temperature differences. Dimensional stability and so on. For gears and shaft parts, due to their power transmission function, extremely strict material selection and structural design are required. In general, it is not recommended to use assembled structure or welding structure. As long as the gear blank is within the allowable range of forging conditions, They are all in the form of integral forgings of spokes and rims. When the diameter of the top circle of the gear is less than 2 times the shaft diameter, due to the limitation of the connection between the gear and the shaft, it is often made into the form of a shaft gear.