Method for testing paddle-changing bearing in wind generating set

Abstract

The invention discloses a test method of a test platform for a variable propeller bearing of a wind turbine, which comprises the following steps: 1) conducting a detection and a test run to a variable propeller drive device; 2) mounting a fixing ring of the bearing to be tested by using a hub of the test platform, simultaneously connecting a rotation ring of the bearing to be tested with a balance weight arm, driving the bearing to be tested to rotate slowly through the variable propeller device, and confirming a tester without jamming and abnormal noise; 3) conducting an operation test to the bearing to be tested for some time in the same direction, recording a variable propeller motor torque value and temperature rise of the variable propeller drive device in real time; 4) judging whether the bearing to be tested is qualified according to the torque value and the temperature rise. The test method of the invention is safe and reliable and capable of simulating the working condition of the bearing.

Description

technical field [0001] The present invention relates to the field of wind power generation, and more specifically relates to a testing method and testing platform for a pitch bearing in a wind generating set. Background technique [0002] The function of the pitch bearing in the wind turbine is to realize the rotation of the blade relative to the hub according to the operation requirements of the wind turbine. Specifically, the pitch bearing is installed between the blade and the hub, and the wind turbine is composed of pitch motors, reducers, brakes, couplings, frequency conversion cabinets, and drive gears. Among them, the pitch bearing is the most critical component, which requires strong bearing capacity and high reliability. However, the existing pitch bearing adopts a double-row ball structure, and the axial and radial clearance between the ball and the raceway is zero or zero. Negative clearance, the size of the clearance is related to many factors such as the bearin...

AI Technical Summary

Problems solved by technology

These loads have a great influence on the clearance of the pitch bearing and even the friction coefficient of the bearing. It is unreasonable to use the clearance at no-load as the basis for the assembly adjustment of the bearing;

[0006] 3. If the wind turbine supplier does not carry out the simulated load test of the bearings, it is difficult to find the defective bearings in time, which will make subsequent bearing replacement difficult and affect the normal operation of the wind turbines

[0007] 4. Generally speaking, bearing suppliers provide friction coefficients to wind turbine designers according to empirical formulas to determine parameters such as motor power and gearbox torque. Since empirical formulas are proposed for all slewing bearings, there are some problems in use. limitations, which will result in inaccuracies in the design of other components

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