阀门内漏声发射监测及其信号特征提取与分析
李海云 1朱汉华 1吴洁 1尹志生1
作者信息
- 1. 武汉理工大学船海与能源动力工程学院,湖北武汉 430063
- 折叠
摘要
针对阀门内漏监测困难,文章提出非介入式的无损检测对内漏信号进行检测.文章分析了阀门完全密封与阀门内漏、各种外界干扰等工况信号的时频域特征,研究内漏信号的特征参数与阀门进口压力、泄漏速率的关系,得到振动加速度aRMS值与泄漏速率的函数关系,为泄漏速率的估算提供依据.通过对小波包能量分率的研究,得到阀门内漏能量集中在3 200～8000Hz的结论.
Abstract
In view of the difficulty of valve internal leakage monitoring,this article proposes a non-interventional nondestructive testing method to detect internal leakage signals.The article analyzes the time-frequency domain characteristics of working condition signals such as completely sealed valves,valve internal leak-age,and various external interference.It studies the relationship among characteristic parameters of internal leakage signal,valve inlet pressure,and leakage speed and obtains the function relationship between the vibration accelera-tion aRMS and the leakage speed,which provides a basis for the estimation of leakage speed.According to the wave-let packet energy fraction,the paper is concludes that the energy of valve internal leakage concentrates in 3 200～8 000 Hz.
关键词
阀门内漏/特征值提取/小波包/能量分率Key words
valve internal leakage/eigenvalue extraction/wavelet packet/energy fraction引用本文复制引用
基金项目
中央、国家各部门项目(SXHXGZ-SCJ-2020-2)
出版年
2024
NETL
NSTL
维普
万方数据