330 MW汽轮机组轴承振动故障分析与处理  

Analysis of Bearing Vibration Fault on 330 MW Steam Turbine Unit and Its Treatment

作　　者：朱生华[1] 俎海东 辛士红[1] ZHU Shenghua;ZU Haidong;XIN Shihong(Inner Mongolia Power Research Institute,Hohhot 010020,China)

机构地区：[1]内蒙古电力科学研究院,呼和浩特010020

出　　处：《内蒙古电力技术》2018年第4期75-78,共4页Inner Mongolia Electric Power

基　　金：内蒙古电力科学研究院2016年自筹科技计划项目(2016-ZC-10)

摘　　要：某电厂330 MW机组启动过程中由于汽轮机组2号轴承振动大导致机组振动保护动作跳闸。对引发机组振动的各种可能原因分别进行了排查,通过振动频谱分析等手段认为主要原因为振动传感器支架刚度不足及轴承磨损。通过对2号轴承振动传感器支架进行加固,并利用ANSYS结构动力学软件模拟计算了加固前后振动传感器支架的振型及振动频率,机组重新启动后再未发生类似故障。A 330 MW steam turbine unit tripped during startup for the vibration protection action of No.2 bearing.The possible reasons leading to the vibration problem were analyzed.Through the analysis of vibration frequency spectrum,thought that the main cause reason could be attributed to the insufficient stiffness of the shaft vibration sensor bracket and the bearing abration.The shaft vibration sensor bracket of bearing was reinforced after analysis and computation by using numerical simulation software.The problem was solved as the unit started up again.

关 键 词：汽轮机组 振动 传感器支架 轴承 临界转速 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]