高背压供热汽轮机低压转子模态分析  

Modal Analysis of Low Pressure Rotor of High Back Pressure Heating Turbine

作　　者：戈志华[1] 马立群 李亚华 董玉亮 GE Zhi-hua;MA Li-qun;LI Ya-hua;DONG Yu-liang(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education,North China Electric Pow er University,Beijing 102206, China)

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学)

出　　处：《汽轮机技术》2019年第3期167-170,共4页Turbine Technology

摘　　要：针对汽轮机高背压供热改造后,汽轮机低压转子结构变化,排汽温度升高,有可能造成转子振动的问题,以低压转子标高变化为基础变量,通过模态分析,得出低压转子-轴承系统模态振型,从而分析高背压运行转子振动特性。为指导汽轮机高背压供热改造及汽轮机振动故障诊断奠定理论基础。In view of the problem of rotor vibration caused by the exhaust steam temperature increasing after the high back pressure heating retrofit of steam turbine, the modal mode of the low-pressure rotor-bearing system is obtained by modal analysis based on the elevation change of the low-pressure rotor in this paper. So that the vibration characteristics of rotor with high back pressure are analyzed, which lays a foundation for the retrofit of high back pressure heat supply of steam turbine and the diagnosis of vibration fault of low pressure cylinder.

关 键 词：高背压供热 轴承标高 转子振动特性 模态分析 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]