中国电力 ›› 2019, Vol. 52 ›› Issue (2): 144-148,177.DOI: 10.11930/j.issn.1004-9649.201806017

• 发电 • 上一篇    下一篇

循环水泵动态镜板翘曲故障诊断及振动评价讨论

张楚1,2, 杨毅1,2, 金格1,2, 刘石1,2, 高庆水1,2   

  1. 1. 广东电网有限责任公司电力科学研究院, 广东 广州 510080;
    2. 广东电科院能源技术有限责任公司, 广东 广州 510080
  • 收稿日期:2018-06-13 修回日期:2018-09-26 出版日期:2019-02-05 发布日期:2019-03-27
  • 作者简介:张楚(1985-),男,硕士,高级工程师,从事电力设备故障诊断的研究与处理工作,E-mail:zhangchu718@163.com
  • 基金资助:
    国家重点研发计划(储能系统与电力系统的耦合与控制技术,2017YFB0903604)。

Diagnosis on Failure of Dynamic Warping of Circulating Water Pump's Mirror Plate and Discussion on Vibration Evaluation

ZHANG Chu1,2, YANG Yi1,2, JIN GE1,2, LIU Shi1,2, GAO Qingshui1,2   

  1. 1. Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China;
    2. Guangdong Diankeyuan Energy Technology Co., Ltd., Guangzhou 510080, China
  • Received:2018-06-13 Revised:2018-09-26 Online:2019-02-05 Published:2019-03-27

摘要: 循环水泵-电机系统存在2倍频为主的不稳定振动问题,且电机冷却方式对其振动特性有显著影响。针对该故障开展现场测试,诊断并验证了电机在特定工况下发生动态镜板翘曲故障。对镜板翘曲故障进行机理分析得出,轴段轴线不重合导致产生2倍频振动,轴线不重合故障的集中度决定了运行设备中表现出的主振频率,低频振动信号在振动速度积分成振动位移过程中放大,推荐低速设备非旋转部件振动采用振动速度进行评价。

关键词: 火电厂, 循环水泵, 倍频振动, 镜板翘曲, 轴线不重合, 评价标准

Abstract: The unstable vibration on the 2nd harmonic has been existing in the pump-motor system, and the way to cool the motor has a significant effect on its vibration characteristics. Therefore, the field testing for this fault has been taken to diagnose and verify the failure of dynamic mirror plate warping of the motor under certain conditions. The analysis on the mechanism of the mirror warping failure concludes that it is the axial misalignment that leads to double frequency vibration. The concentration of the axial misalignment determines the dominant frequency of the operating equipment. The low-frequency vibration signal is amplified into the vibration displacement during the integration of the vibration velocity. At the end, it is suggested that the vibration velocity should be used to evaluate the vibration of the non-rotating parts of the low-speed equipment.

Key words: thermal power plant, circulating water pump, multiples of vibration, mirror plate warping, axis misalignment, evaluation standard

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