大型汽轮发电机组碰摩故障案例研究及分析

摘要

In this paper,some rub-impact faults cases are listed in domestic steam turbine units in recent years,and the faults rotors,fault position and fault causes are analysed,the rub-impact faults are found to be caused mainly by too small clearance,cylinder expansion impediment,vapor lock problems,etc.And from vibration frequency,amplitude change,phase change,and other related features,the vibration features of rub-impact fault are analyzed.Based on above analysis,corresponding counter-measures are proposed,which may serve as the references for the safe operations of the steam turbine units.%列举了近年来国内一些大型汽轮发电机组碰摩故障案例,对发生故障转子、部位及故障原因进行案例统计分析,得出碰摩故障的主要原因包括动静间隙调整过小、汽缸膨胀不畅以及汽封问题等,从振动频率、振幅变化、相位变化及其它相关特征归纳分析了碰摩故障的振动特征,进一步得出了常用的处理碰摩故障的措施,为大型汽轮发电机组安全运行提供了技术参考与借鉴依据.