三峡右岸15_18号发电机振动及噪声优化改进.pdfVIP

2010.№1 大 电 机 技 术 13 三峡右岸 15～18 号发电机振动及噪声优化改进 贺建华，陈昌林，铎 林，张天鹏，张景林 （东方电机有限公司，四川德阳 618000 ） [摘 要] 针对三峡右岸 15∼18 号发电机及左岸 VGS 发电机投运后振动和噪声偏大现象，进行了全面系统的 测试及理论分析。发现发电机电磁方案存在设计缺陷，是引起 100Hz 电磁振动和噪声的内在根源，定转子不 圆（气隙不均匀）是引起发电机 1∼3 倍转频振动的主要原因，同时认识到了结构及安装精度对机组的振动摆 度会产生较大影响。通过更改发电机定子接线方式解决了 100Hz 电磁振动和噪声问题，控制安装质量和改进 发电机部分结构等措施大幅降低了发电机 1∼3 倍转频的低频振动幅值和混频幅值，从根本上解决了上述发电 机振动和噪声问题。 [关键词] 发电机；电磁振动和噪声；定子接线改进；结构优化 [中图分类号] TM312 [文献标识码] A [文章编号] 1000-3983(2010)01-0013-06 Improvement and Optimization for Vibration and Noise Performance of No. 15~18 Power Generating Unit of Three Gorges Right Bank Power Plant HE Jian-hua, CHEN Chang-lin, DUO Lin, ZHANG Tian-peng, ZHANG Jing-lin （Dongfang Electric Machinery Co., Ltd., Deyang 618000, China ） Abstract: A comprehensive and systematic testing and theoretical analysis were carried out on the abnormal vibration and noise level of generating Unit 15~18 at Right Bank Power Plant and 6 generators supplied by VGS Consortium for the Left Bank Power Plant. It was found that the electromagnetic design was the inherent cause for 100Hz electromagnetic vibration and noise, while the roundness deviations of both stator and rotor (uneven air gap) are the major reason to cause vibration of generators with 1∼3 multiple rotating frequency. It was also found that the mechanical structure and installation accuracy of the units also produce rather impact on unit vibration and run-out. By changing the generator stator connections, the 100H