某1000 MW机组发电机阻尼条蹿动致转子振动异常案例分析及处理  

Analysis and Treatment on the Abnormal Rotor Vibration Case in a 1000 MW Unit Generator with Damping Bar Runout

作　　者：杨玉磊 Yang Yulei(East China Electric Power Test&Research Institute,China Datang Corporation Science and Technology General Research Institute Co.,Ltd.,Hefei 230088,China)

机构地区：[1]中国大唐集团科学技术研究总院有限公司华东电力试验研究院,合肥230088

出　　处：《发电设备》2024年第1期36-41,共6页Power Equipment

摘　　要：详细介绍了某台1 000 MW汽轮发电机在检修后并网运行时转子振动幅值随负荷的升高而异常增大的分析和处理全过程。通过机组运行数据、变工况测试、转子匝间绝缘诊断和抽转子检修等分析转子振动异常的原因,同时结合机组检修,对转子阻尼条通风孔进行偏划扩孔。结果表明:转子阻尼条蹿动导致部分通风孔严重堵塞引起转子在高负荷工况下严重的热不平衡,进而造成转子振动异常,通过采用偏划扩孔方案彻底解决了阻尼条蹿动对异常转子振动的影响。For a 1000 MW steam turbine generator unit during paralleling operation after maintenance,a detail introduction was conducted on the whole process of analysis and treatment for the abnormal increase of vibration amplitude with the increase of load.The reason of abnormal rotor vibration was analyzed from the aspects of the unit operation data,variable operation condition test,rotor inter-turn insulation diagnosis,and rotor sampling inspection,while combined with the unit maintenance,the rotor damping bar ventilation holes were offset and enlarged.Results show that,the severe thermal imbalance of rotor under high-load operation condition was caused by the damping bar runout with the blockage of some ventilation holes,which results in the abnormal rotor vibration.The adverse effect of the damping bar runout on the abnormal rotor vibration is completely eliminated through the offset and enlargement for the ventilation holes.

关 键 词：发电机 转子 阻尼条 堵塞 振动 热不平衡 

分 类 号：TM311[电气工程—电机]