大型机组末端瓦不稳定振动故障诊断及治理  

Fault Diagnosis and Treatment of Unstable Vibration of End Bush of Large Unit

作　　者：马思聪 李卫军 李国明 匡萃杰 乔红宝 蔡文方 MA Si-cong;LI Wei-jun;LI Guo-ming;无(Hangzhou Yineng Electric Technology Co.,Ltd.;State Grid Zhejiang Electric Power Co.,Ltd.;Guoneng Zhejiang Beilun No.3 Power Generation Co.,Ltd.;Xinjiang Production and Construction Corps Hongxing Power Generation Co.Ltd.)

机构地区：[1]杭州意能电力技术有限公司 [2]国网浙江省电力有限公司电力科学研究院 [3]国能浙江北仑第三发电有限公司 [4]新疆生产兵团红星发电有限公司

出　　处：《电站系统工程》2024年第4期54-56,60,共4页Power System Engineering

摘　　要：某1000 MW机组增容改造后运行中出现8瓦瓦振逐渐爬升现象,瓦振高达13.8 mm/s,接近跳机值。现场通过一系列的振动测试及分析,排除各类因素,最终得出轴瓦台板与混凝土基础之间的基础螺栓存在松动为主要原因,励磁机转子轴振较大为次要原因,同时分析轴瓦受力情况,在不停运机组的情况下,采取重新拧紧基础螺栓的措施后,8瓦瓦振下降至3.5 mm/s,验证了振动判断的正确性。The gradual climbing phenomenon of No.8 bush vibration in the operation of a 1000 MW unit after uprating is introduced.The bush vibration is as high as 13.8 mm/s,close to the tripping value.Through a series of vibration tests and analysis,various factors were excluded.Finally,it was concluded that the looseness of the foundation bolt between the bearing plate and the concrete foundation was the main reason,and the large shaft vibration of exciter rotor was secondary reason.At the same time,the force of bearing was analyzed.In the case of non-stopping the unit,after the measure of tightening the foundation bolt again,the vibration of the 8 bush decreased to 3.5 mm/s,which verified the correctness of the vibration judgment.

关 键 词：1000 MW 轴瓦 瓦振 爬升 基础螺栓 松动 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]