流体机械2024，Vol.52Issue(11)：87-96,10.DOI:10.3969/j.issn.1005-0329.2024.11.012
基于KPCA的核电厂隔膜压缩机缸盖螺栓松动故障诊断研究
Research on bolts fault diagnosis of diaphragm compressor cylinder head in nuclear power plant based on KPCA
摘要
Abstract
Aiming at the problem of loose bolts in the cylinder head of diaphragm compressor in nuclear power plant,by analyzing the influencing factors of loose bolts,an experimental system for diagnosing loose bolts in the cylinder head of diaphragm compressor was established.The variation,distribution characteristics and influence laws of axial forces of all bolts in the cylinder head before and after bolt loosening were mastered.A method for identifying and locating loose bolts was constructed based on KPCA algorithm and fault reconstruction contribution rate.The training and testing experiments were carried out on bolts in different loose states.The results showed that axial force was the key feature to identify the loose state of bolts.According to the real-time data and change law of cylinder head bolt axial force load,this method could quickly identify the bolt loose fault behavior and accurately determine the fault location of loose bolts.When the axial force attenuation coefficient was 5%and 10%,the minimum recognition accuracy was 96%and 98%respectively.It provided a new method for early warning and online real-time detection of diaphragm compressor bolts,which was of great significance to ensure the safe and stable operation of diaphragm compressor in nuclear power plant.关键词
核电厂/螺栓松动/隔膜压缩机/轴向力/故障诊断Key words
nuclear power plant/loose bolts/diaphragm compressor/axial force/fault diagnosis分类
机械制造引用本文复制引用
万益恒,薛金山,张大勇,韩学杰,吕井,苗雯禹..基于KPCA的核电厂隔膜压缩机缸盖螺栓松动故障诊断研究[J].流体机械,2024,52(11):87-96,10.基金项目
国家自然科学基金项目(51105362) （51105362）
阳江核电有限公司科技项目立项资助(3100172380) （3100172380）
