流固热耦合效应对气体静压径向轴承的影响  

Influence of Fluid Solid Thermal Coupling Effect on Aerostatic Journal Bearings

作　　者：高浩 龙威[1] 辛晓承 王萍[1] 刘云龙 GAO Hao;LONG Wei;XIN Xiaocheng;WANG Ping;LIU Yunlong(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《轴承》2022年第10期123-132,共10页Bearing

基　　金：国家自然科学基金资助项目(51766006);云南省万人计划资助项目(YNWR-QNBJ-2018-162)。

摘　　要：基于气体润滑理论和空气动力学的基本原理,建立气体静压径向轴承的气膜数学模型,通过数值分析和试验相结合的方法,分析了不同供气压力、偏心率、转速时,双向流固耦合和流固热耦合作用对气体静压径向轴承承载力和刚度的影响规律。通过理论分析,明确了高速电主轴气体轴承工作过程中压缩热和摩擦热的形成机理和持续局部温升对气膜和固体边界的协同耦合作用机制;借助数值计算,描述了气膜内部气动热温度场(供气孔出口压缩热和气膜入口的摩擦热)对气膜流场特性和固体边界的作用效果。Based on gas lubrication theory and basic principle of aerodynamics,the mathematical model of gas film of aerostatic journal bearings is established.Through combination of numerical analysis and experiment,the influence law of bidirectional fluid-solid coupling and fluid-solid-thermal coupling effect on load capacity and stiffness of the bearings is analyzed under different gas supply pressures,eccentricities and rotational speeds.Through theoretical analysis,the formation mechanism of compression heat and friction heat and synergistic coupling mechanism of continuous local temperature rise to the boundary between gas film and solid are clarified during working process of the bearings for high-speed motorized spindle.By means of numerical calculation,the effect of aerodynamic heating temperature field inside gas film(the compression heat at outlet of gas supply hole and friction heat at inlet of gas film)on characteristics of gas film flow field and solid boundary is described.

关 键 词：滑动轴承 气体静压轴承 气体润滑 空气动力学 流固耦合 承载力 刚度 

分 类 号：TH133.31[机械工程—机械制造及自动化] TH133.35