Yaw gearbox

Abstract

The invention discloses a yaw gearbox which comprises an input end, an output end and a multi-stage planetary gear structure, the multi-stage planetary gear structure comprises at least one stage of single-arm planetary assembly, each single-arm planetary assembly comprises a planetary carrier, a planetary shaft, a planetary gear and a sun gear meshed with the planetary gear, and the planetary carrier and the planetary shaft are of an integrated structure. The planet gear is sleeved on the planet shaft through a bearing without an outer ring; the planet shaft is provided with a positioning step used for abutting against the lower end face of the bearing without the outer ring, the upper end face of the planet shaft is provided with a bending groove with at least one bending bayonet, the bottom face of the bending groove is lower than the upper end face of the planet wheel, and the outer wall face of the bending groove is bent outwards so that the upper end face of the bearing without the outer ring can be axially positioned. The upper end face of the planet carrier is provided with a wear-resisting pad used for making contact with the lower end face of the sun gear, and the lower end face of the planet carrier is used for being in key connection with the output end or the next-stage sun gear. By omitting bearing accessories such as a gasket and a clamp spring, the structure is simplified, the assembly is convenient, and the axial height is reduced.

Description

technical field [0001] The invention relates to the technical field of wind turbines, and more specifically, to a yaw gearbox. Background technique [0002] As a reducer, the yaw gearbox is an important part of the wind turbine, mainly including the input end, multi-stage planetary gear structure and output end. [0003] Please refer to figure 1 , The yaw gearbox adopts a four-stage planetary gear structure, the first-stage and second-stage planetary assemblies are single-arm planetary assemblies, and the third-stage and fourth-stage planetary assemblies are double-arm planetary assemblies. The planetary shaft in each stage of the planetary assembly is installed in the planetary carrier, and the planetary shaft is sleeved with a planetary gear. The planetary wheel is meshed with the sun gear of the current stage, and the planetary frame is keyed with the sun gear of the next stage. During assembly, the planetary shaft is installed in the mounting hole of the planetary carr...

AI Technical Summary

Problems solved by technology

[0004] The coaxiality error caused by the processing of the mounting holes on the planet carrier and the installation of the planetary shaft may cause the planetary gear to produce eccentric loads during work, which will lead to abnormal noise and poor meshing, which will affect the quality of the yaw gearbox; the planetary shaft is thermally Press-fitting, cold-pressing gaskets, bearings, planetary wheels, and circlips, etc., there are many related parts and the assembly process is complicated, which increases the assembly cost and increases the axial height of each planetary assembly, thereby increasing the yaw gear The overall volume and quality of the box are not suitable for the development direction of lightweight yaw gearbox

Images