在线监测与频谱分析在汽机故障诊断中的应用

Application of online monitoring and spectrum analysis in fault diagnosis of turbine

河南省中原大化集团有限责任公司所属煤化工项目02单元的空气压缩机采用蒸汽透平拖动方式运行,具有良好的节能性,但在正常生产运行中存在振动异常升高、噪声大等问题。本文介绍了空气压缩机机组系统结构、振动等参数的在线监测系统、机组联锁保护程序以及3500系统频谱分析法。研究了汽轮机振动在线状态监测系统与和频谱分析技术在汽机故障诊断中的应用;以空气压缩机及蒸汽轮机组成为切入点进行逐步展开、论证。结果表明压缩机在线监测系统能够及时发现压缩机组在生产运行中出现的异常工况,3500系统频谱分析仪在对异常部位的振动数据进行采集后,通过频谱、轴心轨迹和生产工艺参数等进行综合分析能够有效判断机组的故障机理,进而为机组运行提供优化方案。

The air compressor in unit 02 of the coal chemical project of Henan Zhongyuan Dahua Group Co.,Ltd.runs by steam turbine,which has good energy saving,but there are problems such as abnormal vibration and high noise in normal production and operation.This paper introduces the on-line monitoring system of air compressor unit structure,vibration and other parameters,interlock protection program and spectrum analysis of 3500 system.The application of on-line vibration monitoring system and spectrum analysis technology in fault diagnosis of steam turbine is studied.Taking the air compressor and steam turbine set as the entry point to develop and demonstrate step by step;the results indicate that:shrink machine online monitoring system can timely find compressor unit in the production of abnormal condition occurred in the use of spectrum analyzer 3500 system on the vibration of the abnormal parts after data collection,through the spectrum,the axis trajectory and production process parameters and so on carries on the comprehensive analysis can effectively judge the fault mechanism of unit,thus provide unit operation optimization scheme.