考虑支点变形和摩擦的可倾瓦轴承动力学特性研究  

Dynamic characteristic analysis of tilting-pad journal bearings considering deformation and friction of pivot

作　　者：金英泽 袁小阳[2] JIN Yingze;YUAN Xiaoyang(Naval Architecture and Ocean Engineering College,Dalian Maritime University,Dalian 116026,China;Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]大连海事大学船舶与海洋工程学院,辽宁大连116026 [2]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049

出　　处：《振动与冲击》2022年第20期61-67,167,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51775412);中央高校基本科研业务费(3132019308)。

摘　　要：针对球形支点可倾瓦轴承(tilting-pad journal bearing,TPJB)瓦块与支点滑动接触问题,采用紊流雷诺方程、赫兹接触理论和库伦摩擦定律建立了考虑支点弹性力和摩擦力矩的可倾瓦轴承系统非线性动力学模型和分析方法,研究了支点变形和摩擦对水润滑可倾瓦轴承轴心轨迹、瓦块振动响应和最小液膜厚度等动力学特性的影响,揭示了支点半径比和支点摩擦因数对轴承性能的影响规律。结果表明:支点变形可使系统振幅和最小膜厚皆增大;支点摩擦可使系统振幅减小,对最小膜厚影响较小且与动载大小有关;增大支点半径比和支点摩擦因数有利于降低系统振幅;当支点半径比为0.96~0.97、支点摩擦因数为0~0.15时,轴承有较高的承载能力。研究结果对球形支点可倾瓦轴承精确建模和优化设计有参考价值。Aiming at the sliding contact problem between pad and pivot of spherical-pivot tilting-pad journal bearing(TPJB),a nonlinear dynamic model and an analysis method of TPJB systems considering the elastic force and friction torque of pivot were established using the turbulent Reynolds equation,the Hertz contact theory and the Coulomb friction law.The effects of pivot deformation and friction on the journal center orbit,pad vibration response and minimum film thickness of water-lubricated TPJB were investigated.The influence rules of pivot radius ratio and pivot friction coefficient on bearing performance were revealed.The results show that pivot deformation can increase the system amplitude and minimum film thickness;pivot friction can reduce the system amplitude and has little effect on the minimum film thickness,and the effect is related to dynamic loads;increasing the pivot radius ratio and pivot friction coefficient can reduce the system amplitude;when the pivot radius ratio is 0.96-0.97 and the pivot friction coefficient is 0-0.15,the TPJB has higher load-carrying capacity.The results provide reference value for the accurate modeling and optimal design of spherical-pivot TPJB.

关 键 词：可倾瓦轴承(TPJB) 支点变形 支点摩擦 动力学特性 

分 类 号：TH133.37[机械工程—机械制造及自动化]