OS1-08 マイクロマシン・ガスタービン用超小形超高速慣性空気軸受の開発(OS1 マイクロエネルギー変換)

概要

論文の詳細を見る
A micro-high speed gas bearing to realize high-speed operation of a micro-rotor at 870,000rpm for the micro-compressor performance test of a micro-gas turbine of the impeller diameter 10mm, has been developed. The diameter of the journal bearing is 4mm. The outer and inner diameters of the thrust bearing are 10mm and 5mm, respectively. The hydroinertia gas bearings have been selected for the type of the bearings. Hydroinertia gas bearing is a type of hydrostatic gas bearing with larger bearing gap than usual. The flow in the wider side of the gap that appear by eccentric shift of the shaft or the thrust disk, becomes supersonic and generate suction forces to pull them back. The loading capacity can be larger than that of usual hydrostatic bearings. The target speed of 870,000rpm has successfully been achieved by increasing the supply pressure of the thrust bearings, and shortening the bearing length. No clear effect of changing the supply gas pressure of journal bearing, diagonally, has been observed.
社団法人日本機械学会の論文
2005-06-28