大型汽轮发电机组油膜失稳故障研究与分析  

Study and analysis on oil-film instability of large-scale turbine generator

作　　者：宋光雄[1] 张煜[2] 王向志[1] 谢骐宇[1] 宋君辉[1] 张云河 

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]国核电力规划设计研究院,北京100095 [3]辽宁东方发电有限公司,辽宁抚顺113008

出　　处：《中国电力》2012年第5期63-67,共5页Electric Power

基　　金：国家自然科学基金资助项目(51075146)

摘　　要：汽轮发电机组油膜失稳是现场常见的振动故障,一旦发生将产生严重的后果。通过分析油膜失稳故障案例,总结故障发生的主要原因有外界扰动过大、轴承标高不当、轴承间隙不适、轴承型式不当和润滑油温过低,分析了低频振动频率、振幅变化与运行参数关系及其他相关特征,给出故障处理措施。根据分析结果,提出了油膜失稳故障诊断的依据和预防油膜失稳故障的措施,为汽轮发电机组安全运行提供技术参考与借鉴。Oil film instability of turbine generator was a common failure which has serious consequence. By analyzing the oil-film instability cases, the reasons were summarized, such as the large external disturbance, unsuitable bearing elevation, unsuitable bearing clearance, unsuitable bearing type and too low lubrication oil temperature. The relations between the low frequency vibration frequency, amplitude change and operation parameters and other related features were analyzed. According to the analysis, the measures and the basis for fault diagnosis of the oil-film instability were proposed, which can provide a technical references for the safe operation of the units.

关 键 词：油膜涡动 汽轮发电机组振动 油膜振荡 振动特征 

分 类 号：TM311[电气工程—电机]