CUI Yahui, ZHANG Junjie, GU Junsheng, et al. Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine[J]. Thermal power generation, 2013, 42(9): 118-120.
CUI Yahui, ZHANG Junjie, GU Junsheng, et al. Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine[J]. Thermal power generation, 2013, 42(9): 118-120.DOI:
超临界660MW机组异常振动频率的诊断与处理
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。
Abstract
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