Method for Alleviating Pitting Corrosion on Tooth Surface of Wind Turbine Gearbox

Abstract

The invention discloses a method for relieving gear face pitting of a gearbox of a wind driven generator. The method includes the following technical measures that a brake is arranged on a low-speed shaft of the gearbox, when a unit is shut down, the brake is input, and therefore a wind wheel stops rotating; the rotating speed of a high-speed shaft is monitored, when the air speed changes, the torque of the wind wheel is larger than the braking torque, the wind wheel can rotate, and when the rotating speed of the high-speed shaft is increased to V2, a low-speed shaft brake is released, and the wind wheel continues to rotate; when the air speed is reduced and the rotating speed of the high-speed shaft is reduced to V1, the low-speed shaft brake is input, and the wind wheel stops rotating; and V2 is larger than V1, and when the air speed exceeds the specified air speed, the low-speed shaft brake is not input, and an idling state of a draught fan is kept.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a method for alleviating tooth surface pitting of a gear box of a wind power generator. Background technique [0002] Wind turbines are the main equipment for converting wind energy into electrical energy, and as the key mechanical system of wind turbines, the performance of gearboxes plays a vital role in the normal operation of wind turbines. Since wind turbines work under harsh conditions with variable loads, are erected at high altitudes, and are difficult to maintain, this puts forward high requirements on the dynamic performance and reliability of the gear transmission system. [0003] Due to factors such as power limitation and failure, the wind turbine will cause abnormal shutdown of the unit. At this time, the unit will be in an idling state, and the wind wheel will often rotate alternately in positive and negative directions due to turbulent wind. The gap will cause ...

AI Technical Summary

Problems solved by technology

[0003] Due to factors such as power limitation and failure, the wind turbine will cause abnormal shutdown of the unit. At this time, the unit will be in an idling state, and the wind wheel will often rotate alternately in positive and negative directions due to turbulent wind. gap, resulting in pitting corrosion of some teeth of the gearbox due to fretting wear, causing damage to the internal structure of the gearbox transmission system and reducing the service life of the gearbox

Images