Dynamic Characteristic of Gear System with Wear Fault Under Random Wind Speed
The wear of tooth surface is calculated by Archard wear model,and the time-varying meshing stiffness is obtained.At the same time,considering the factors such as the tooth side clearance,the comprehensive transfer error and the external excitation caused by random wind speed,the dynamic model of high-speed level gear transmission system of wind turbine with wear fault is established.The vibration differential equation of gear transmission system is solved by Runge-Kuttamethod.The dynamic charac-teristics of the high-speed level gear transmission system of wind turbine under different accumulative wear are analyzed.The re-sults show that the Archard wear model is consistent with the actual gear wear state.The wear is the least at the pitch line and the wear is greatest at the top of the tooth.The fluctuation trend of vibration displacement is opposite to that of input torque.With the in-crease of wear time,the fluctuation degree of vibration displacement increases.After 5 years of run-in,the amplitude of the main response frequency of the gear changes linearly.The research results provide an important theoretical basis for fault diagnosis and detection of the gear transmission system
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