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

doi:10.11930/j.issn.1004-9649.201806017

Abstract

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

CLC Number:

TM621
TH311

ZHANG Chu, YANG Yi, JIN GE, LIU Shi, GAO Qingshui. Diagnosis on Failure of Dynamic Warping of Circulating Water Pump's Mirror Plate and Discussion on Vibration Evaluation[J]. Electric Power, 2019, 52(2): 144-148,177.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201806017

https://www.electricpower.com.cn/EN/Y2019/V52/I2/144

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