动磁直线压缩机气体轴承特性的CFD模拟  

CFD Simulation of Gas Bearing Characteristic for a Moving-Magnet Linear Compressor

作　　者：李海宁[1] 张晓青[1] 李奎[1] 刘巧凤[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《工程热物理学报》2013年第6期1026-1030,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50976037);武汉市科技攻关计划项目(No.201171034312)

摘　　要：针对动磁式直线压缩机的工作特点,提出一种实用的气体轴承结构,以改善气缸与活塞间的自润滑特性,从而提高直线压缩机的效率。通过CFD数值计算,分析了静压气体轴承的结构参数及进出口压力变化对其静态承载能力和耗气量的影响,进而研究了轴承的动态承载特性,给出了气体轴承的最佳几何参数。Through the operating characteristic of a moving-magnet linear compressor,a structure of practical hydrostatic gas bearing is proposed and applied to a linear compressor for improving the self-lubrication characteristic between the cylinder and the piston in a Stirling cryocooler.The efficiency of a linear compressor is thus enhanced.The effects of structural parameters and of inlet and outlet pressure changes of static gas bearing on the static load bearing capacity and on the gas consumption are analyzed by a CFD numerical calculation.The dynamic load-bearing characteristic of the gas bearing is in turn investigated and optimal geometric parameters are provided.

关 键 词：动磁直线压缩机 气体轴承 CFD模拟 承载特性 

分 类 号：TK123[动力工程及工程热物理—工程热物理]