大型汽轮机转子-轴承系统油膜涡动故障分析及处理  

Research on Fault Analysis and Dispose for Oil Film Whirl of Large Steam Turbine Rotor-bearing System

作　　者：周彦[1] 谢诞梅[1] 刘石[2] 冯永新[2] 

机构地区：[1]武汉大学动力与机械学院 [2]广东电网公司电力科学研究院

出　　处：《电站系统工程》2014年第6期55-58,共4页Power System Engineering

摘　　要：油膜涡动是大型汽轮机轴系常见的失稳故障之一,在某些情形下会对机组造成严重损伤,处理不当甚至引起灾难性事故,造成直接的经济损失。首先,从轴承中的转子受力分析指出油膜涡动的失稳根源,并说明了油膜涡动的故障特征及原因分析;其次,采用有限元方法建立了简单的单圆盘转子-轴承系统模型,加以考虑轮盘质量、转动惯量的分布效应、系统阻尼,基于转子动力学分析了典型的油膜涡动的响应;最后,以某电厂1000 MW汽轮机组为例分析了可倾瓦承载的中压转子发生油膜涡动故障的特征、判别和处理方法。Oil film whirl is one of the most common instability fault of large turbo generator units＇ shaft system. Improper handling will directly affect the safe operation of the equipment and cause a direct economic loss. Firstly, summarized the mechanism for oil film whirl fault; Then, a simple single disk rotor-bearing system model was established with finite element method, and typical oil film whirl response process was analyzed through rotor dynamics theory. Lastly, taking a certain 1000 MW unit as an example to illustrate oil film whirl fault＇ features, judging methods and treatment measures.

关 键 词：大型汽轮机 油膜涡动 有限元 响应 故障特征 诊断处理 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]