300MW汽轮机振动故障处理  

Fault Processing of 300MW Steam Turbine Vibration

作　　者：郝飞 陈长利 吕继周 

机构地区：[1]中电投河南电力有限公司技术中心,郑州450001 [2]新乡豫新发电有限责任公司,新乡453011

出　　处：《机械设计与制造》2012年第10期130-132,共3页Machinery Design & Manufacture

摘　　要：某厂严临界300MW机组在运行中#1轴承“Y”向轴振在负荷（230～250）MW时，#3高调阀开度为（20～30）％间突然增大，且随高调阀开度变化而波动，影响了机组安全运行。对此现象我们对该机组的振动进行监测，进行了故障分析，认为这种现象是由于#1轴承负荷偏低所致，根据现场实际情况，本着在不揭缸的情况下，尽量增大#1轴承负荷，而使动静间隙变化最小的原则，提出了降低#2轴承标高的处理建议，在C级检修中实施，机组启动后，#1轴承”Y”向振动最大值由原来的143μm降至108μm，取得了良好的效果。A sub-critical 300MW unit operated with #1 bearing ＂Y＂ axis vibration suddenly increased when the load was （230-250）MW,and the #3 IV opening degree was （20-30）% ,and #1 bearing＂Y＂axis vi- bration fluctuated with the change of CV openin~ which affected safe operation af the unit. In this regard, through monitoring the unit vibration,and failure analysis ,we considered that this phenomenon was due to the #1 bearing being in low loads.In accordance with the actual situation of the scene, with the spirit of not expos- ing cylinder,increasing the #1 bearing load to the greatest extent, changing least,#2 bearing elevation was proposed to get lower and get implemented in the start of the unit, the maximum ＂Y＂axis vibration value of#1 bearing was which achieved good results. the gap of dynamic-static part the C-level maintenance.After from 143μm down to 108μm,which achieved good results.

关 键 词：汽轮机振动 故障 振动监测 激振 

分 类 号：TH16[机械工程—机械制造及自动化] TK269[动力工程及工程热物理—动力机械及工程]