Effect of possible rotor deformation on the probability of face contact for a liquid film bearing

N. Y. Bailey, S. Hibberd, H. Power

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Abstract

The possibility of face contact is examined for a coaxial rotor-stator bearing in dynamic motion constrained by a highly rotating very thin liquid film. A modified Reynolds equation for pressurised flow is coupled to the bearing structure leading to determination of the bearing gap from solving a nonlinear second-order non-autonomous ordinary differential equation. Periodic solutions are found via a mapping solver. Rotor deformation is parametrised by a coning angle and considered a random variable. The method of derived distributions is used to quantify variation in coning angle and examine the probability of rotor-stator contact. Additionally, effects of possible destabilising random aspects on the axial rotor oscillations are investigated. Exact solutions for probability of contact are obtained for various bearing configurations.

Original languageEnglish
Pages (from-to)297-310
Number of pages14
JournalTribology International
Volume109
Early online date23 Dec 2016
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • Face contact
  • Method of derived distribution
  • Probability density function
  • Reynolds equation

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