The transition of a vertical rotor that rotates in slip bearings through the selfoscillation zone

Kel'Zon, A. S.; Yakovlev, V. I.

doi:10.1007/bf01033247

Cited by 1 publication

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“…The authors discussed the effects of bearing clearance and compliance of elastic supports. Based on the results, stability criterions of vertical rotor are given [ 1 ]. Castro and Cavalca discussed influences of damping, length to diameter ratio and unbalance on the stability of horizontal and vertical rotors.…”

Section: Introductionmentioning

confidence: 99%

Stability analyses of inclined rotor bearing system based on non-linear oil film force models

Liu

Ding

Sun

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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Stability characteristics of inclined rotor bearing system are investigated by numerical and experimental research. The dynamic equation is established based on finite element method. To describe the oil film force of journal bearing, Capone's short bearing model and a variational approximate finite bearing model are employed separately and compared. Different inclination states are considered as different radial loads on journal bearing. Newmark method employed to solve the dynamic equation and stability characteristics are discussed. The numerical results show that the short and finite bearing models have differences on describing the oil force induced oil whirl and whip. Compared with the short bearing model results, unstable zones given by finite bearing model have larger breadth and larger whirl/whip amplitude. With the development of rotor inclination, the unstable threshold decreases and the unstable zone become wider. Influences of parameters on unstable thresholds are also affected by rotor inclination. Comparisons of numerical and experimental results show that the finite bearing model results are more close to the test results.

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Section: Introductionmentioning

confidence: 99%