风电机组齿轮的弱磁检测技术

Weak magnetic testing technology of wind power gear

针对现有无损检测技术难以满足风电机组齿轮多类型缺陷检测需求的问题,提出了一种基于弱磁原理的无损检测技术。采用所提方法,设计试验分别对两种含有不同缺陷的17Cr2Ni2Mo钢试样进行检测,采集检测数据后进行信号处理和分析,最后与工业CT、巴克豪森噪声检测结果进行对比。试验结果表明,弱磁检测技术对齿轮的表面和内部裂纹缺陷较为敏感,对齿轮的磨削烧伤有很好的识别能力,定位准确,信号处理后的结果更为直观清晰。该技术在风电机组齿轮的无损检测中具有应用潜力。

A nondestructive testing technology based on weak magnetic principle was proposed to address the problem that existing nondestructive testing techniques were unable to meet the requirements of detecting multiple types of defects in wind turbine gears.Using the proposed method,the experiments were designed to detect two types of 17Cr2Ni2Mo steel samples with different defects,detection data were collected,signal processing and analysis were performed,and the results with industrial CT and Barkhausen noise detection were compared finally.The experimental results showed that weak magnetic detection technology was more sensitive to surface and internal crack defects of gears,had good recognition for grinding burns of gears,accurate positioning,and the results after signal processing were more-intuitive and clear.This method has the potential for application in nondestructive testing of wind turbine gears.