汽轮发电机组启机过程动静摩擦故障分析  

Analysis on Rubbing Fault During the Starting Process of Turbo-generator Units

作　　者：孔祥渠[1] 宋光雄[1] 李威[2] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206 [2]天津国投津能发电有限公司,天津300480

出　　处：《汽轮机技术》2012年第2期141-143,共3页Turbine Technology

基　　金：国家自然基金项目资助(项目批准号:51075146);中央高校基本科研业务费专项资金资助

摘　　要：汽轮发电机组启动过程中由于机组运行参数及状态不稳定,经常会发生轴承或轴瓦振动过大情况,动静摩擦及支撑刚度降低是两种常见的故障原因。根据某电厂2号汽轮发电机组在大修后启动过程中出现轴承及轴瓦振动过大问题,通过对机组启动过程振动数据分析,结合已有相似的案例,确定机组发生了动静摩擦故障,并且对轴承座存在支撑刚度降低导致共振的问题,进行了分析。Due to the unstable operating parameters and states during the starting process of turbo-generator units, the excessive vibration of bearings and bushes often occur. The rubbing and the decrease of the support stiffness are the common fault reasons. By studying the excessive vibration of bearings and bushes occurred during the starting process in the No. 2 turbo-generator units in a power plant after the overhaul, analyzing the vibration data in the starting process, and making reference to the existing similar cases, this paper determines the fault reasons for the rubbing and analyzes the resonance caused by the decrease of the support stiffness in the bearing housing.

关 键 词：热弯曲 动静摩擦 支撑刚度 共振 

分 类 号：TH133.2[机械工程—机械制造及自动化]