发电技术 ›› 2017, Vol. 38 ›› Issue (5): 55-58.DOI: 10.3969/J.ISSN.2095-3429.2017.05.013

• 发电技术 • 上一篇    下一篇

发电机两端支撑特性对其振动响应的影响研究及应用分析

曾庆猛, 刘志敏   

  1. 华电电力科学研究院, 浙江 杭州 310030
  • 收稿日期:2017-08-10 出版日期:2017-10-30 发布日期:2017-10-30
  • 作者简介:曾庆猛(1988-),男,安徽泗县人,硕士,工程师,主要从事旋转机械振动故障诊断及处理工作;刘志敏(1988-),男,江苏南通人,学士,工程师

Research and Analysis of the Influence of Generator Support Characteristics on Vibration Response and Its Application

ZENG Qingmeng, LIU Zhimin   

  1. Huadian Electric Power Research Institute, Hangzhou 310030, China
  • Received:2017-08-10 Published:2017-10-30 Online:2017-10-30

摘要: 建立了某1000MW机组的有限元模型,利用该模型研究了发电机两端支撑特性相近和差别显著时轴系的振动响应特性,模拟结果表明发电机两端支撑特性相近时,发电机一阶不平衡主要引起发电机一阶临界转速下的同相振动;而当发电机两端支撑特性相差较大时,发电机一阶不平衡在发电机一阶临界转速下激起较大的同相振动,同时也激起较大的反相分量。最后结合某发电机异常振动诊断及处理案例进一步验证了结论的可靠性。

关键词: 汽轮发电机, 支撑特性, 振动, 三支撑结构

Abstract: The paper established a finite element mod-eling of a 1000 MW unit.The model was used to study the vibration response characteristics of the shafts at both ends of the generator.The simulation results showed that the first-order imbalance of the generator first caused the in-phase vibration at the first-order critical speed of the generator when the two ends of the generator support simi-lar characteristics.When the difference in support character-istics between the two ends of the generator was large, the first-order unbalance of the generator provoked a large inphase vibration at the first-order critical speed of the gener-ator, and also provoked a large reverse component.Finally, the reliability of the conclusion was verified by combining the abnormal vibration diagnosis and processing cases of a generator.

Key words: turbo-generator, supporting characteristic, vibration

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