拖拉机涡轮增压器中混合陶瓷球轴承无损检测设计

Non-destructive Test Design of Hybrid Ceramic Ball Bearing in Tractor Turbocharger

依据多频涡流检测原理,提出了一种新的基于调频涡流的混合陶瓷球轴承无损检测方法。该方法采用单个检测通道和三角波调制信号,可以实现不同深度缺陷的检测和得到幅值线性变化的调制信号,使用自比式探头作为传感器,有效地抑制了温度漂移和探头振动产生的误差,提高了检测的效率和精度。建立了拖拉机涡轮增压器中混合陶瓷球轴承涡流无损检测仿真模型,并利用有限元软件对不同缺陷尺寸的拖拉机涡轮增压器中混合陶瓷球轴承进行了缺陷尺寸识别的仿真模拟计算,搭建了多频涡流无损检测系统实验平台,将实验测得的缺陷尺寸结果和仿真模拟计算进行了对比,验证了仿真和实验结果的一致性,进而说明了多频涡流检测在拖拉机涡轮增压器中混合陶瓷球轴承实际生产中应用的可行性。

Based on the testing principle of multi frequency eddy current, it put forward a new hybrid ceramic ball bearing based on frequency modulated eddy current nondestructive detection method, which uses a single detection channel and triangle wave modulation signal to realize detection of defects in different depth and get a linear amplitude modulated sig- nal. By using self than the probe as a sensor, it effectively inhibited the temperature drift and vibration probe error, which improved the detection efficiency and accuracy. It established tractor turbine supercharger mixed by ceramic ball bearing eddy current nondestructive testing simulation model. It used the finite element software of different defect size tractor tur- bo is mixed ceramic ball bearing the defect size identification simulation, built the multi frequency eddy current nonde- structive detection system experimental platform, the simulation results are compared for the experimentally measured de- fect size and the simulation results, verify the consistency of the simulation and experimental results, so that the multi frequency eddy current testing in tractor turbocharger mixed ceramic ball bearings in actual production application feasibility.