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首页> 外文会议>ASME(American Society of Mechanical Engineers) International Mechanical Engineering Congress: Advanced Energy Systems Division; 20031115-20031121; Washington,DC; US >DESIGN AND TEST OF HYDROSTATIC GAS BEARINGS FOR A HYBRID CRYOGENIC REFRIGERATOR
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DESIGN AND TEST OF HYDROSTATIC GAS BEARINGS FOR A HYBRID CRYOGENIC REFRIGERATOR

机译：混合低温制冷机的静压气体轴承设计与试验

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摘要

A hybrid pulse-tube/reverse-Brayton cryocooler is being developed that integrates a regenerative, pulse-tube upper stage with a recuperative, reverse-Brayton lower stage using a flow rectification system consisting of check-valves and buffer volumes. This system shows the potential for high performance with high reliability and low mass, and simple electrical, mechanical, and thermal integration. The turbine in the reverse-Brayton stage will be supported on hydrostatic gas bearings. The performance of the hybrid cryocooler system is strongly dependent upon the performance of these bearings; in particular their stiffness and mass flow consumption. This is a unique application of hydrostatic bearings; the miniature bearings are operating at cryogenic temperatures using high pressure helium. This paper describes the theoretical model that was developed to predict journal bearing performance as geometry and operating conditions change. The model is verified against experimental measurements of stiffness and mass flow consumption for a prototypical set of journal bearings. The model is subsequently used to optimize a set of journal bearings for the cryogenic turbine and parametrically investigate the effect of journal bearing clearance on system performance.
机译：正在开发一种混合式脉冲管/反向布雷顿低温冷却器，它使用由止回阀和缓冲液组成的流量整流系统，将再生的脉冲管上部与换热的反向布雷顿下部相集成。该系统显示出具有高可靠性，低质量以及简单的电气，机械和热集成的高性能的潜力。反向布雷顿阶段的涡轮将由静压气体轴承支撑。混合式低温冷却器系统的性能在很大程度上取决于这些轴承的性能。特别是它们的刚度和质量流量消耗。这是静压轴承的独特应用。微型轴承使用高压氦气在低温下运行。本文介绍了一种理论模型，该模型可用来预测几何形状和工作条件变化时的轴颈轴承性能。针对一组典型的轴颈轴承，根据实验测量的刚度和质量流量消耗对模型进行了验证。该模型随后用于优化低温涡轮机的一组轴颈轴承，并从参数上研究轴颈轴承游隙对系统性能的影响。

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