3222 ウルトラマイクロガスタービン用動圧型空気軸受の開発

概要

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Currently, an ultra-micro gas turbine has been paid attention as attractive MEMS power systems and high-speed micro-rotating machinery was proposed to provide mechanical-to-electrical energy conversion system with the order of watts. This kind of device is usually made of single crystal silicon and the rotor is supported by both aerostatic joumal and thrust bearings. In this paper, a newly developed structure of high speed micro-rotating rotor supported by an aerodynamic joumal bearing instead of an aerostatic bearing is proposed. In addition, the proposed bearing adopts a floating bush to improve the stability at high speeds. The floating bush is supported by an aerostatic bearing using a pressurized air fed by an aerodynamic herringbone grooved joumal bearing. It was found that the proposed bearing was able to generate sufficient pressure to support a floating bush.
一般社団法人日本機械学会の論文
2003-08-05