【作者】 刘志会；

【导师】 顾煜炯；

【作者基本信息】 华北电力大学（北京） ， 动力机械及工程， 2010， 硕士

【摘要】 本文以大量自激振动故障现场处理案例为基础,将轴瓦自激振动按照产生原因、部位、故障发生工况进行分类,将汽流激振按照故障严重程度、发生时间、故障原因和故障负荷进行分类；深入分析各类故障的现象、典型特征以及产生原因,并在此基础上总结轴瓦自激振动与汽流激振的主要特征；根据特征分析对机组自激振动故障按照振动性质、振动部位、振动具体原因的步骤进行诊断,使用FMEA和FTA相结合的方法制作了自激振动的故障树,并提出在线抑制措施和检修方案；最后以实际案例为依据,对某300MW机组发电机前轴承轴瓦自激振动和海门1000MW机组汽流激振进行仿真；研究结果对于汽轮发电机组自激振动故障的判定和治理具有理论指导意义和实践价值。更多还原

【Abstract】 Based on a large number of self-excited vibration fault case, the paper classified the bearing self-excited vibration accordance with the causes, location, operating conditions when the failure occurred, and classified the steam flow excitation vibration accordance with failure severity, time of occurrence, failure causes and the unit load when failure occurred. This paper made an In-depth analysis of phenomenon of various types of faults, typical characteristics and causes for bearing self-excited vibration and steam flow excitation vibration, and concluded main features of these two faults on this basis. According to characteristics of self-excited vibration fault of the unit, the paper made a diagnosis with the steps of vibration Properties, vibration position and vibration causes, produced the fault tree of self-excited vibration of using the method of combining FMEA and FTA and proposed On-line elimination and maintenance programs. Finally, based on actual cases, the paper did simulation for bearing self-excited vibration of generator front bearing in 300MW unit and steam flow excitation vibration of 1000MW unit in a plant. The results of this study have theoretical guidance and practical value to determine and control of self-excited vibration failure of turbine-generator unit.更多还原