某超临界600 MW机组汽轮机振动异常原因分析及处理  

Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine

作　　者：王家胜 赵杰[2] 甘飞[1,3,1] 徐章福 王锁斌 

机构地区：[1]贵州电力试验研究院,贵州贵阳550002 [2]西安热工研究院有限公司,陕西西安710032 [3]重庆大学

出　　处：《热力发电》2015年第10期116-118,123,共4页Thermal Power Generation

基　　金：贵州电网公司重点项目(066600KK5220120145)

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。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 baf-fle,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.

关 键 词：超临界 600 MW机组 汽轮机 振动 盘车 螺栓 鼓风挡板 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]