全动压气体轴承小型逆布雷顿循环空气制冷机.pdfVIP

全动压气体轴承小型逆布雷顿循环空气制冷机 的机械性能研究 王林忠 陈纯正 侯予 林韶宁 王可 （西安交通大学制冷及低温研究所，陕西西安， 710049 ） 摘 要 本文介绍了西安交通大学低温工程研究所近年来对新型结构弹性支承箔片全动压径向气体轴承、 三可倾瓦全动压径向气体轴承、新型弹性箔片动压止推气体轴承和平面螺旋槽静动压复合止推气体轴承所 进行的械振动性能、稳定性能、启停性能、热力性能和镀层表面处理等领域研究的研究成果。性能实验研 究采用新型弹性支承箔片径向气体轴承和动静压复合型平面螺旋槽止推气体轴承的全动压气体轴承组合 形式，分别对空气制冷机稳定运行 30 分钟、60 分钟、120 分钟时刻的轴心轨迹、镀层表面、失稳特性、 4 4 气膜涡动和扰动进行了时域和频域分析。实验获得了近23 ×10 rpm 全动压高速稳定运行和在 21 ×10 rpm 转速下稳定运行6 小时的实验结果，并表现出良好的运行特性和稳定性。 关键词 逆布雷顿循环 空气制冷机 透平膨胀机 机械性能 MECHANICAL PERFORMANCE STUDY ON SMALL REVERSE-BRAYTON CYCLE REFRIGERATOR WITH AERODYNAMIC GAS BEARING Wang Lin-zhong Chen Chun-zheng Hou Yu Lin Shao-ning Wang Ke (Institute of Cryogenic Engineering, Xi an Jiaotong University, Xi an, 710049) Abstract Micromation, high-efficiency, long life, slight vibration and wider cooling temperature range are the remarkable advantages of small Reverse-Brayton Cycle Air Cryogenic Machine (ACM). It is one of the ideal schemes to develop ACMs with high-efficiency, high-reliability and long life. The mechanical and thermodynamic performance test used new type elastic supporting foil gas bearing and spire groove thrust gas bearing on the 3 30Nm /hr Open Cool-return Reverse-Brayton Cycle ACM. It was obtained that the good test result and 4 performance parameters on the speed of 22 ×10 rpm for 120min, attain –75℃ of the refrigerating temperature and 85℃ of the temperature drop. The test study lays a foundation for the successful exploiture and appliance of Reverse-Brayton ACM. Keywords Reverse-Bray ton Cyc le A ir Cry ogenic Machine Turboexpand er Mechanical Perf ormance 基金项目：高等学校