航空发动机涡轮叶片裂纹的自动仿形涡流检测系统设计及试验研究

Design and Experimental Study of Automated Eddy Current Testing System for Turbine Blade Crack

针对航空发动机涡轮叶片的快速检测难题,研制了机械自补偿差动式涡流探头,开发了专用五轴联动自动仿形扫查系统,开展了涡轮叶片自动涡流检测试验研究。试验结果表明,使用研制的探头配合自动扫查系统可以消除提离信号,减小抖动干扰,显著提高裂纹缺陷的检测信噪比,可望应用于涡轮叶片类复杂曲面构件的缺陷检测。

Based on the fast detection problem of aero-engine turbine Blades,a new differential eddy current sensor is developed with mechanical self-compensation,the research of automated eddy current testing experiment on turbine blade of aero-engine is developed with the five axis linkage contour automatic detection system.The results show that using the eddy current sensor with the automatic detection system is able to eliminate the lift-off signal,reduce jitter interference,and effectively improve the signal-to-noise ratio compared with manual detection.This method is expected to be applied to the metal with complex curved surface like turbine blade.