基于箔片非线性刚度模型的止推箔片轴承特性研究

doi:10.3901/JME.2020.15.198

机械工程学报 ›› 2020, Vol. 56 ›› Issue (15): 198-206.doi: 10.3901/JME.2020.15.198

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基于箔片非线性刚度模型的止推箔片轴承特性研究

徐方程¹, 侯留凯¹, 吴斌²

1. 大连理工大学工业装备智能控制与优化教育部重点实验室大连 116024;
2. 苏州东菱振动试验仪器有限公司苏州 215163

收稿日期:2020-01-15 修回日期:2020-04-10 出版日期:2020-08-05 发布日期:2020-10-19
通讯作者: 徐方程(通信作者),男,1985年出生,副教授。主要研究方向为气体箔片轴承、箔片密封、挤压油膜阻尼器及转子动力学。E-mail:fcxu@dlut.edu.cn
作者简介:侯留凯,男,1996年出生,硕士。主要研究方向为气体箔片轴承、转子动力学。E-mail:houliukai@mail.dlut.edu.cn
吴斌,男,1965年出生,副教授。主要研究方向为振动与冲击。E-mail:wubin@donglingtech.com
基金资助:
国家自然科学基金（11702050）和中国博士后科学基金（2018M641690）资助项目。

Performance of Thrust Foil Bearings with Nonlinear Foil Stiffness Model

XU Fangcheng¹, HOU Liukai¹, WU Bin²

1. Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education, Dalian University of Technology, Dalian 116024;
2. Suzhou Dongling Vibration Test Instrument Co., Ltd., Suzhou 215163

Received:2020-01-15 Revised:2020-04-10 Online:2020-08-05 Published:2020-10-19

摘要/Abstract

摘要： 搭建了波纹箔片刚度测试试验台，基于单片波纹箔片结构的刚度测试试验，利用Matlab拟合试验数据的方式推导出波纹箔片非线性的刚度模型。根据扇形波纹箔片的结构特点，对波纹箔片划分网格，根据各节点的面积占比，对各节点赋予刚度值。通过有限元法和有限差分法，耦合气体雷诺方程、气膜厚度方程以及波纹箔片非线性刚度模型的方程进行求解，研究波纹箔片非线性刚度特点对气体止推箔片轴承静态特性的影响。对恒定刚度模型和非线性刚度模型进行仿真分析，并与试验结果进行对比，验证波纹箔片非线性刚度的合理性。对两种模型所计算的止推轴承偏心率进行比较，发现了止推箔片轴承在轻载时，非线性刚度模型的波纹箔片刚度更小，偏心率更大。另外，利用箔片刚度试验和理论相结合的方法预测止推轴承静态特性，其方法具有一定的工程指导意义。

关键词: 气体止推箔片轴承, 非线性刚度, 轴承承载力, 轴承偏心率, 雷诺方程

Abstract: The test rig for measuring the stiffness of bump foil had been established. Based on the stiffness test of single bump foil, the nonlinear stiffness model of bump foil is derived by fitting the test data with MATLAB. The bump foil is meshed according to the structural characteristics of the sector bump foil and the stiffness of each node is given according to the area proportion of each node. By using the finite element method and the finite difference method, the gas Reynolds equation is solved coupled with film thickness equation and nonlinear stiffness model equation of the bump foil. The effects of the nonlinear stiffness characteristics of the bump foil on the static characteristics are studied. The constant stiffness model and the nonlinear stiffness model are simulated and analyzed, and the test results are compared to verify the reasonableness of the nonlinear stiffness of bump foil. By comparing the eccentricity calculated by the two models, it is found that the bump foil stiffness of the nonlinear stiffness model is smaller and the eccentricity is larger when the thrust foil bearing is under light load. In addition, the static characteristics of thrust bearing are predicted by the method of combining foil stiffness test and theory, which has certain engineering guiding significance.

Key words: air thrust foil bearing, nonlinear stiffness, load capacity, eccentricity, Reynolds equation

中图分类号:

V229
TH133

徐方程, 侯留凯, 吴斌. 基于箔片非线性刚度模型的止推箔片轴承特性研究[J]. 机械工程学报, 2020, 56(15): 198-206.

XU Fangcheng, HOU Liukai, WU Bin. Performance of Thrust Foil Bearings with Nonlinear Foil Stiffness Model[J]. Journal of Mechanical Engineering, 2020, 56(15): 198-206.

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基于箔片非线性刚度模型的止推箔片轴承特性研究

Performance of Thrust Foil Bearings with Nonlinear Foil Stiffness Model

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