WANG Jiasheng, ZHAO Jie, GAN Fei, et al. Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine[J]. Thermal power generation, 2015, 44(10): 116-118.
WANG Jiasheng, ZHAO Jie, GAN Fei, et al. Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine[J]. Thermal power generation, 2015, 44(10): 116-118.DOI:
某超临界600MW机组汽轮机振动异常原因分析及处理
摘要
针对某超临界600MW机组汽轮机冲转过程中由于振动大发生跳闸故障
通过分析该机组跳闸时的BODE图和振动参数
推断机组存在大部件脱落
并伴随有较大的碰磨。经检查确认振动为汽轮机盘车齿轮联轴器螺栓鼓风挡板脱落
使盘车罩壳脱落在转轴上所致。拆除该鼓风挡板后
汽轮机冲转和机组运行均稳定正常。因此
建议制造厂在设计同类型机组时应考虑加固或者取消该螺栓鼓风挡板。
Abstract
Due to large vibration
a supercritical 600 MW unit steam turbine trapped during startup process.By analyzing the BODE diagram and vibration parameters
this paper concludes that shedding of large parts of the unit is the main cause of the malfunction
which is accompanied by rubbing between the static and dynamic parts.By checking out the unit bearing box
it makes sure that the screw bolt's blast baffle fell off during the unit start process
leading to break off of the turning gear's shell.After removing the blast baffle
the unit start up process and operation turned to normal.Therefore
it suggests that the blast baffle be reinforced or removed when designing the same type units.