A Novel Fault Diagnosis Method of Pump Rotor Based on Modal Analysis

Xing Liang

doi:10.4028/www.scientific.net/AMM.448-453.3709

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 448-453A Novel Fault Diagnosis Method of Pump Rotor Based...

A Novel Fault Diagnosis Method of Pump Rotor Based on Modal Analysis

Abstract:

The 3D flow filed of pump is calculated based on the Navier-Stokes equations and k-ε turbulence model, and the simulation results not only are beneficial to analyze the pressure pulsation around pump impellers, but also provide the boundary conditions for modal analysis of pump rotors. And then a novel fault diagnosis method is provided to simulate the nature frequencies of rotor, and research the relationship between rotor structure and rotor abnormal vibration based on the modal analysis. The research results show that, the frequency of water pressure pulsation mainly concentrated in 24.5Hz and 49.0Hz, especially when the blade angle of pump is greater than -2°; the nature frequencies of first order modal and second order modal are closely to the same 49.0Hz, so it is easy to induce the resonance, and the resonance is an important factor which lead to the severe vibration of pump.

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Periodical:

Applied Mechanics and Materials (Volumes 448-453)

Pages:

3709-3712

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.448-453.3709

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Online since:

October 2013

Authors:

Xing Liang*

Keywords:

Fault Diagnosis, Nature Frequency, Pump, Resonance

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* - Corresponding Author

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