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| The quantitative detection of valve internal air leakage based on acoustic emission theory |
| LI Zhen-lin, ZHANG Hai-feng, XIA Guang-hui |
| College of Mechanical and Transportation Engineering,China University of Petroleum, Beijing 102249 |
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Abstract The objective of this paper is to establish the quantitative relations between the valve internal air leakage rate and the root mean square of characteristic parameters of acoustic emission signal ( ). AE testing for valves internal air leakages under test platform was performed to detect and the factors such as the valve internal leakage rate and the valve type were discussed about the effects on AERMS. It is clearly demonstrated that the volume of air leakage rate was successful detected using AERMS, and the max measurement error of acoustic emission detection technology within 10%，therefore the acoustic emission detection technology can be used for the detection of valve internal air leakages.
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Received: 20 June 2012
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2013, Vol. 32 
