In order to realize efficient and accurate detection of the pitch bearing tooth surface of wind turbines in service under the adhesion of high viscosity lubricating grease,profiling array eddy current technology is used to study the effects of different coil arrangement methods and lifting distances on the detection results of bearing tooth surface defects.It can be concluded that,the edge effect range of Z-shaped and composite coil layout is different,and the composite profiling probe is significantly shorter than the Z-shaped probe.By detecting the artificial groove defects of 10.00 mm×0.50 mm×1.00 mm(slot length × slot width × slot depth),it indicates that the lifting distance limits for inner and outer toothed bearings are 1.04 mm and 1.43 mm,respectively.Experimental verification is conducted on the in-service fan bearings under the condition of high viscosity lubricating grease on the surface,and the results of defect size and position detection are accurate,with an error of less than 5％.This provides technical support and new ideas for supervision and inspection of the pitch bearing gear tooth surface in service.
关键词
在役风机/变桨轴承/高黏润滑油/涡流检测
Key words
in-service wind turbines/pitch bearing/high viscosity lubricating oil/eddy current testing
维普
万方数据