考虑支点变形和摩擦的可倾瓦轴承动力学特性研究

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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系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系数有利于降低系统振幅；当支点半径比为0.96~0.97、支点摩擦系数为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。
关键词：可倾瓦轴承；支点变形；支点摩擦；动力学特性

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	金英泽1
	袁小阳2

关键词 ：可倾瓦轴承, 支点变形, 支点摩擦, 动力学特性

Abstract：Aiming at the sliding contact problem between pad and pivot of spherical-pivot tilting-pad journal bearing (TPJB), a nonlinear dynamic model and analysis method of TPJB system considering the elastic force and friction torque of pivot were established using turbulent Reynolds equation, Hertz contact theory and 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 could increase the system amplitude and minimum film thickness; pivot friction could 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 could 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 research results provide reference value for the accurate modeling and optimal design of spherical-pivot TPJB.
Key words: tilting-pad journal bearing; pivot deformation; pivot friction; dynamic characteristic

Key words： tilting-pad journal bearing pivot deformation pivot friction dynamic characteristic

收稿日期: 2021-09-01 出版日期: 2022-10-28

引用本文:

金英泽1，袁小阳2. 考虑支点变形和摩擦的可倾瓦轴承动力学特性研究[J]. 振动与冲击, 2022, 41(20): 61-67.
JIN Yingze1，YUAN Xiaoyang2. Dynamic characteristic analysis of tilting-pad journal bearings considering deformation and friction of pivot. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(20): 61-67.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I20/61

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