Research On Online Monitoring System Of Wear Debris In Wind Turbine Gearbox

In current technology of condition monitoring and fault diagnosing of wind turbine gearboxes, vibration condition monitoring is widely used because of its reliable performance. However, vibration condition monitoring is incapable of the incipient faults caused by fatigue wear. In this respect, oil wearing debris condition monitoring has better performance. Therefore, we can combine these two means to improve the accuracy of fault diagnosis of wind turbine gearboxes.The configuration and major type of faults of wind turbine gearboxes are introduced in this paper at first. In the bases of the research to the existing method of vibration&oil condition monitoring, this thesis presents a new structure of oil wearing debris sensor based on electromagnetic induction principle, and corresponding software-simulation was carried out. Then thesis describes the design of the signal processing circuit of oil wearing debris detection device and a test is given to validate its performance. The practical testing result shows that the new oil wearing debris detection device has higher sensitivity than existing products.In order to improve the rate and accuracy of wind turbine gearbox fault diagnosis, a synthesis condition monitoring strategy with vibration condition monitoring and oil wearing debris condition monitoring is given in this thesis after a further research on typical faults and detect methods of wind turbine gearboxes. Then thesis describes the development of the synthesis condition monitoring platform based on synthesis condition monitoring strategy.