Uniform load test verification method of yaw driving system of wind turbine generator

Abstract

The invention discloses a uniform load test verification method of a yaw driving system of a wind turbine generator. The structural features of the yaw driving system are fully considered in the method, a torque test sensor is installed on a structure in front of a last stage inner gear ring of a yaw reduction gearbox planetary system and a supporting underframe, a yaw driving torque is extrapolated by measuring the torsional deformation of the outer wall of the structure and the calibration relationship between the torsional deformation and the torque, being different from the traditional test method of mounting the torque sensor, the yaw driving system is directly converted into the sensor itself, the original system structure does not need to be changed, and the defects that large changes are made to the driving system by the conventional detection method, resulting in heavy workload and measurement errors caused by the unknown gear training efficiency, are solved.

Description

technical field [0001] The invention relates to the technical field of wind turbine yaw drive, in particular to a load sharing test verification method for a wind turbine yaw drive system. Background technique [0002] It is known in the industry that with the development of large-scale wind turbines, the yaw drive system is a slow-speed and heavy-load system. Generally, multiple yaw drive systems are designed around the yaw ring gear, and the number varies. The yaw drive system is mainly composed of a yaw drive motor, a yaw reducer, and a drive gear. The yaw motor drives the high-speed end of the yaw reducer, and the low-speed end of the yaw reducer connects the drive gear to mesh with the yaw ring gear. Drive the entire wind turbine nacelle to rotate and yaw relative to the tower. The yaw drive system is composed of multiple yaw drives, and each yaw drive adopts the form of multi-stage planetary gear transmission in series, in which the ring gear is fixed, the planetary g...

AI Technical Summary

Problems solved by technology

The conventional method of measuring shaft torque is to install a commercial torque sensor between the drive gear and the reduction box, or install a torque sensor at the high-speed end to monitor the high-speed shaft torque, and then extrapolate to the low-speed shaft torque. Both methods are There are defects. The first type will seriously change the on-site tooling, the operation is complicated, the cost is high, and it is basically impossible to implement on-site; the second type will also require additional tooling on each unit, and due to the unknown transmission efficiency and the influence of the transmission dead zone, the impact measurement accuracy

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