660MW超超临界汽轮发电机密封瓦引起的振动故障分析及处理  

Sealing Pad Induced Vibration Fault Analysis and Processing of 660MW Ultra Supercritical Turbine-Generator

作　　者：路军锋 胡爱民 齐云峰 韩辉 LU Jun-feng;HU Ai-min;QI Yun-feng

机构地区：[1]辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]中国能源建设集团东北电力第一工程有限公司 [3]朝阳燕山湖发电有限公司

出　　处：《电站系统工程》2019年第5期37-40,共4页Power System Engineering

摘　　要：机组在运行1年后,出现发电机转子5、6号轴承振动不稳定,且周期性大幅波动,轴承振动最大超过200μm,严重影响机组长期安全运行。对机组振动数据特征、机组运行过程及盘车状态条件下发电机密封油油氢差压变化特点分析,得出机组发电机5、6号轴承振动的主要原因是由于发电机密封瓦与轴颈碰磨引起的。通过停机检查确认密封瓦及轴颈均有不同磨损。将磨损的密封瓦更换并对轴颈磨痕进行修补后,机组振动恢复正常。No.5 and No.6 shaft vibration are showing characteristics that not steady,fluctuation and maximum vibration is higher than 200gm after the unit putting into operation for more than one years.And the unit cannot operation for long time safety.By analysis the vibration characteristic and oil-hydrogen pressure differential changing characteristic,it is conclude that the reason for vibration is friction between the sealing pad and shaft which is confirmed by inspection after unit shut down.And the vibration recovery to normal level after repair the shaft and replace the damaged sealing pad.

关 键 词：密封瓦 油氢压差 振动 

分 类 号：TM621.7[电气工程—电力系统及自动化]