气动止推轴承非线性特性分析与优化  

Analysis and Improvement of Nonlinear Characteristics of Gas Thrust Bearing

作　　者：耿祥 应华[1] 王升科 王凤云 谢元豪 赵林亭 GENG Xiang;YING Hua;WANG Shengke;WANG Fengyun;XIE Yuanhao;ZHAO Linting(School of Electromechanical and Automotive Engineering,Yantai University,Yantai 264005,China;Yantai Dongde Industrial Co.,Ltd.,Yantai 264006,China)

机构地区：[1]烟台大学机电汽车工程学院,山东烟台264005 [2]烟台东德实业有限公司,山东烟台264006

出　　处：《烟台大学学报(自然科学与工程版)》2025年第1期110-117,共8页Journal of Yantai University(Natural Science and Engineering Edition)

摘　　要：为解决现有装配在某型燃料电池空气压缩机上的气体动压止推轴承承载力与稳定性不足的问题,以现有的波箔式气动止推轴承为基础,自主设计搭建气体动压止推轴承测试试验台,通过实验测试与数值分析,结合ANSYS与MATLAB工具对不同波箔结构的止推轴承整体刚度阻尼特性进行分析研究。结果表明,轴承整体刚度随着加载力的增加,会发生持续变化,呈现出极强的非线性;波箔厚度对波箔刚度有较大的影响,随波箔厚度增加,波箔刚度增大;不同材料弹性模量不同,对波箔刚度也有较大影响;影响波箔刚度特性的主要是波高与单位波长,波与波之间的过渡方式对波箔刚度影响不大。通过ANSYS建立的仿真模型与通过MATLAB拟合获得的刚度模型均能较好地反映轴承性能,可以为后续的轴承改进提供参考。An approach is presented to cure the problem of insufficient bearing capacity and stability of existing gas thrust bearings assembled on a certain type of fuel cell air compressor.Based on the existing gas bump thrust bearings,a gas-dynamic thrust bearing test bench is independently designed and built,and the overall stiffness damping characteristics of thrust bearings with different wave-foil structures are analyzed and studied experimentally and numerically combined with ANSYS and MATLAB tools.The results show that the overall stiffness of the bearing will continue to change with the increase of loading force,showing a strong nonlinearity.The thickness of the wave foil has a great influence on its stiffness,the latter increasing with the former.Different materials have different elastic modulus,which also has a great influence on the stiffness of the wave foil.The stiffness characteristics of wave foil are mainly affected by wave height and unit wavelength,and the transition mode between wave and wave has little effect on wave foil stiffness.The simulation model established by ANSYS and the stiffness model obtained by MATLAB fitting can appropriately reflect the bearing performance and provide reference for subsequent bearing improvement.

关 键 词：止推轴承 波箔式气体动压轴承 非线性特性 ANSYS MATLAB 

分 类 号：V229.2[航空宇航科学与技术—飞行器设计] TH133.37[机械工程—机械制造及自动化]