空间热泵压缩机的径向气浮轴承静态特性研究  

Study on Static Characteristics of GasJournal Bearing Used in Space Heat Pump

作　　者：李育隆[1] 连华奇 徐向华[2] 于新刚[3] 吴宏[1] LI Yulong;LIAN Huaqi;XU Xianghua;YU Xingang;WU Hong(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]清华大学航天航空学院,北京100084 [3]北京空间飞行器总体设计部,北京100084

出　　处：《载人航天》2018年第6期765-771,共7页Manned Spaceflight

基　　金：载人航天预先研究项目(010401)

摘　　要：针对应用于空间热泵系统的气浮轴承技术,将以氟利昂为润滑工质的径向气浮轴承作为研究对象,采用数值模拟的方法研究了几何条件(平均轴承间隙与节流孔直径)、工作状态(偏心率与进口压力)以及润滑工质(空气、R22、R134a)变化对径向气浮轴承的静承载力、质量流量等特性的影响。结果表明,节流孔直径确定时,径向气浮轴承的静承载力存在极大值,对应的最佳平均轴承间隙随节流孔直径以及润滑工质变化,最大静承载力也随之变化。进气压力确定时,静承载力随偏心率增大而增大,但是存在一个最佳的偏心率,使轴承静刚度最大。For the gas-lubrication bearing technology used in space heat pump,a gas journal bearing with Freon was studied.The effects of the bearing geometric parameters(average clearance and orifice diameter),working conditions(eccentricity and supply pressure)and lubricating gases(air,R22 and R134a)on the load capacity,mass flow rate etc.were studied by numerical simulation.The results showed that there was an optimum average clearance for the load capacity under the same orifice diameter,and it was affected by the orifice diameter and the lubricating gas.At the same time,under the same supply pressure,larger eccentricity would increase the load capacity,but there was an optimum eccentricity for the stiffness.

关 键 词：空间热排散 热泵技术 径向气浮轴承 静态特性 氟利昂 

分 类 号：TH133.36[机械工程—机械制造及自动化]