静压径向气体轴承静态特性数值分析

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英文篇名：Numerical Analysis of the Static Performance of Aerostatic Journal Bearings 作者：王新宽 ; 许乔 ; 张连新 ; 阳红 英文作者：WANG Xin-kuan;XU Qiao;ZHANG Lian-xin;YANG Hong;State Key Laboratory of Mechanical System and Vibration,Shanghai Jiaotong University;Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics; 关键词：雷诺方程 ; 静压径向气体轴承 ; 转速效应 ; 静态性能 英文关键词：Reynolds Equation;;Aerostatic Journal Bearings;;Rotation Effects;;Static Performance 中文刊名：JSYZ 英文刊名：Machinery Design & Manufacture 机构：上海交通大学机械系统与振动国家重点实验室;中国工程物理研究院机械制造工艺研究所; 出版日期：2019-05-08 出版单位：机械设计与制造 年：2019 期：No.339 基金：中国工程物理研究院科技计划资助项目(9120602) 语种：中文; 页：JSYZ201905004 页数：5 CN：05 ISSN：21-1140/TH 分类号：21-24+28

摘要

对静压径向气体轴承的静态特性进行了详细的理论研究,采用二阶有限差分方法数值求解无量纲雷诺方程,编制Matlab迭代程序计算轴承的气膜压力分布。仿真分析了各种轴承结构参数和工作参数下静压气体轴承的承载、刚度和质量流量等静态性能的变化规律。仿真结果表明轴颈的转速对静压气体轴承的承载、刚度和质量流量等静态特性施加着重要影响,在分析轴承性能时必须考虑轴颈的旋转效应。当轴颈的转速不断增大时,轴承的气膜压力、承载能力和稳态刚度等静态性能能够得到显著提升。
        The current study presents a detailed theoretical analysis on the performance of aerostatic journal bearings. The dimensionless reynolds equation is derived and discretized by the finite difference method. An iterative procedure is adopted to get the air film pressure distribution. The bearing characteristics such as load capacity,stiffness and air flow rate under various bearing operating and geometric parameters are investigated. The numerical results show that the journal rotation plays an important role on the bearing characteristics,and the rotating speeds must be taken into consideration. With the growth of journal rotational speed,the bearing air film pressure,load capacity and steady stiffness can be increased notably.

引文

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