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Research Article | Open Access

Nonlinear dynamic analysis of low viscosity fluid-lubricated tilting-pad journal bearing for different design parameters

Yingze JIN1, Fei CHEN1, Jimin XU2, Xiaoyang YUAN1( )
Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an 710049, China
Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
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Abstract

To reveal nonlinear dynamic rules of low viscosity fluid-lubricated tilting-pad journal bearings (TPJBs), the effects of design parameters on journal center orbits and dynamic minimum film thicknesses of water-lubricated TPJBs with and without static loads are investigated. The hydrodynamic bearing force used in the nonlinear dynamic analysis is an approximate analytical solution including the turbulence effect. The results reveal the methods for vibration suppression and load capacity improvement and give an optimal pivot offset and clearance ratio that can maximize the minimum film thickness. The results also show that four-pad TPJBs with loads between pads are preferred due to good dynamic performance and load capacity. This study would provide some guidance for nonlinear design of low viscosity fluid-lubricated TPJBs under dynamic loads.

Keywords

journal center orbitdynamic minimum film thicknesstilting-pad journal bearingbearing design parameter

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Friction
Volume 8 Issue 5,
October 2020
Pages 930-944
DOI: 10.1007/s40544-019-0310-6
Cite this article:
JIN Y, CHEN F, XU J, et al. Nonlinear dynamic analysis of low viscosity fluid-lubricated tilting-pad journal bearing for different design parameters. Friction, 2020, 8(5): 930-944. https://doi.org/10.1007/s40544-019-0310-6

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Received: 11 January 2019
Revised: 19 April 2019
Accepted: 26 June 2019
Published: 15 October 2019
© The author(s) 2019

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