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Indexed by:会议论文

Date of Publication:2013-01-01

Included Journals:CPCI-S、Scopus

Volume:15

Issue:PART 7

Abstract:In this article, vibration characteristics of a rub-impact rotor-bearing system excited by unbalanced magnetic pull (UMP) for hydraulic generating set are investigated. The rubbing model used consists of the radial elastic impact and the tangential Coulomb friction. Through numerical calculation, the excitation current, eccentricity are used as the control parameters, investigating their effect on the rub-impact rotor-bearing system, by bifurcation diagrams, Poincare maps, trajectories, and frequency spectrums. Various nonlinear phenomena, including period-one, period-five, quasi-period and chaotic motions, are induced and the system stability is obviously influenced due to the UMP. In addition, it is found that the large eccentricity that exceeds to a certain extent may lead to the full annular rubbing from the partial rubbing. The results can provide some theoretical references for the safety operation and rub-impact fault diagnosis of the hydraulic generating set.