超临界660MW机组异常振动频率的诊断与处理  

Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine

作　　者：崔亚辉 张俊杰 谷军生[2] 魏昆安 李宏卫[2] 李然[2] 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]河北国华定洲发电有限责任公司,河北定州073000

出　　处：《热力发电》2013年第9期118-120,共3页Thermal Power Generation

摘　　要：针对某超临界660MW空冷机组运行中存在的3.5倍频和7倍频异常振动故障,通过测量其轴承瓦盖振动频率、对轮罩振动频率以及传感器支架的固有频率,认为振动原因为对轮罩和传感器支架存在3.5倍频和7倍频的固有频率,导致机组运行中该对轮罩和传感器支架发生了共振。取消对轮罩后,该机组异常振动得以消除。Abnormal vibration with 3.5and 7times frequency occurred on turbine of a supercritical660MW unit.The vibration frequency of bearing shell,the vibration frequency and natural frequency of coupling cover,the natural frequency of sensor bracket were measured.The results showed that,the resonance occurred on the coupling cover and sensor bracket during operation which caused by the natural frequency with 3.5and 7times frequency was considered as the major reason.After the cover of coupling was removed,the abnormal vibration didn't occurred again.

关 键 词：超临界 660 MW汽轮机 振动 传感器 支架 对轮罩 共振 

分 类 号：TK268.+1[动力工程及工程热物理—动力机械及工程]