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

作　　者：Yingze JIN Fei CHEN Jimin XU Xiaoyang YUAN 

机构地区：[1]Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi'an Jiaotong University,Xi'an 710049,China [2]Institute of Tribology,School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Friction》2020年第5期930-944,共15页摩擦（英文版）

基　　金：This work is supported by National Basic Research Program of China(Grant No.2015CB057303);National Natural Science Foundation of China(Grant No.51775412).

摘　　要：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.

关 键 词：journal center orbit dynamic minimum film thickness tilting-pad journal bearing bearing design parameter 

分 类 号：TH133.33[机械工程—机械制造及自动化] TH117.2