P32-09 マイクロガスタービン用空気軸受試験装置の試作

概要

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Self-acting micro air bearings are demanded for developing high performance, maintenance-free micro gas turbines. In this study, we developed a test facility for testing small size air bearings for developing future ultra small size gas turbine where we utilized the rotor of commercially available turbocharger. This setup consists of a gas lubricated foil bearing for a radial bearing and an externally pressurized gas-bearing with multiple air supply holes for a thrust bearing. The foil bearing used in this study is composed of a phosphor bronze foil given some hemisphere-like projections and a housing. The diameter of the rotor is 30 mm and the surface of the rotor is coated by ceramic. We measured rotational speed and vibrations in the radial and axial direction. Finally, we discussed some issues to be solved in future to realize higher rotational speed.
社団法人日本機械学会の論文
2002-06-14