Acoustic Emission Testing of The Shell 0f Electromagnetic Valve
As the control valve of the propulsion system engine, the electromagnetic valve play an important role in attitude and orbit control for spacecraft. While the leak of the electromagnetic valve has always been the main cause of the failure of the propulsion system. Due to the shells complex structure as well as many seam weld on it, the normal NDT is unfit to check out some small cracks and micro-welding defects of the electromagnetic valve.In this paper, the specific way of detection for the valve shell with the help of acoustic emission has been introduced. Especially, we would major describe transducer arrangement,parameter setting and waveform data analysis, etc.. We analyze some relevant technological problems, such as how to improve the defection location precision of small-sized valve shell,also we test and verify the phenomena of micro leakage of the shell by other detection means and hold further discussion about the testing results.This paper summarizes the function of the acoustic emission in the problem of micro-leakage of the shell of the electromagnetic valve, therefore providing us with acoustic emission proof of the quality control of valve and the wide application of this new testing way.KEYWORDS acoustic emission,alve,weld,leak
guozhen XU yiwei CHEN zhihua CAO
Shanghai Institute of Space Power -sources
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
3714-3721
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）