自由活塞斯特林发电机气体静压轴承的承载特性  

Load Characteristics of Hydrostatic Gas Bearings for Free Piston Stirling Generators

作　　者：杨明卓 牟健[1] 林明嫱 洪国同[1,2] YANG Mingzhuo;MOU Jian;LIN Mingqiang;HONG Guotong(Key Laboratory of Technology on Space Energy Conversion,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所,中国科学院空间功热转换技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《轴承》2025年第1期31-38,共8页Bearing

基　　金：国家重点研发计划资助项目(2020YFB1901800)。

摘　　要：气体静压轴承结合间隙密封技术作为自由活塞斯特林发电机的关键技术之一,可使动力活塞在高频往复运动中实现无接触支承,提高发电机的可靠性和使用寿命。为研究自由活塞斯特林发电机气体静压轴承的承载特性,基于轴向流动假设建立了理论模型,通过模型计算了不同条件下气体轴承提供的承载力,设计并搭建了一种气体轴承承载力测试装置,测试了气体轴承在不同供气压力、节流孔直径及数量下的承载力。理论模型与试验结果均表明:承载力与供气压力、节流孔数、节流孔径呈正相关;承载力随活塞与气缸间隙的减小而增大。在间隙一定的条件下,偏心率越大,承载力越大;仿真分析与试验结果具有较好的一致性,说明这种测试方法是可行的。The combination of hydrostatic gas bearings and clearance sealing technology is one of the key technologies for free piston Stirling generators,which can enable the power piston to achieve non-contact support during highfrequency reciprocating motion,improving the reliability and service life of the generators.In order to study the load characteristics of the bearings for the generators,a theoretical model is established based on assumption of axial flow.The load capacity of gas bearings under different conditions is calculated by the model.A device is designed and built to test the load capacity of gas bearings under different gas supply pressures,diameters and numbers of throttle orifices.The theoretical model and test results show that the load capacity is positively correlated with gas supply pressure,number and diameter of throttle orifices;the load capacity increases with the decrease of clearance between piston and cylinder.Under certain condition of clearance,the larger the eccentricity,the larger the load capacity.The simulation analysis is in good agreement with test results,showing that the test method is feasible.

关 键 词：滑动轴承 气体静压轴承 发电机 节流孔 承载力 数值模型 

分 类 号：TH133.36[机械工程—机械制造及自动化] TK123[动力工程及工程热物理—工程热物理]