Research on Fault Transfer Mechanism of Local Rub in Rotor System

doi:10.12068/j.issn.1005-3026.2015.06.015

Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (6): 823-826.DOI: 10.12068/j.issn.1005-3026.2015.06.015

• Mechanical Engineering • Previous Articles Next Articles

Research on Fault Transfer Mechanism of Local Rub in Rotor System

XU Qi¹， ZHAO Li-chao²， ZHAO Qian¹， WEN Bang-chun¹

1.School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2. Installation Accessories Co.Ltd.， Shenyang Blower Works Group Corporation， Shenyang 110869， China.

Received:2014-04-14 Revised:2014-04-14 Online:2015-06-15 Published:2015-06-11
Contact: XU Qi
About author:-
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Abstract

Abstract: The clearance between rotor and stator in rotating machinery becomes smaller to supply high speed and efficient. Local rub failure often occurs which can lead to nonlinear response in the whole rotor system. Timely obtained dynamic characteristics are vital to the fault in rub rotor system. Based on the finite element and the harmonic balance theory， the relationship between harmonic components of vibration responses and frequency response matrix was used to obtain local rub failure transfer mechanism. Validity and robustness were verified by numerical simulations and experiments. Responses of n+2 nodes were needed to obtain responses of the all remaining nodes in n malfunctions of rotor system. The transfer mechanism has a good applicability in rotor system aiming at the rub， misalignment， unbalance and crack.

Key words: rotor system, nonlinear response, harmonic components, rub, fault transfer mechanism

CLC Number:

XU Qi， ZHAO Li-chao， ZHAO Qian， WEN Bang-chun. Research on Fault Transfer Mechanism of Local Rub in Rotor System[J]. Journal of Northeastern University Natural Science, 2015, 36(6): 823-826.

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Research on Fault Transfer Mechanism of Local Rub in Rotor System

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