超小形超高速空気軸受の開発とμマシンターボチャージャへの適用(FR1 マイクロエネルギー変換)

概要

論文の詳細を見る
Development of a micro-high speed gas bearing is underway to realize 870,000rpm to apply it to micromachine gas turbine: The diameter of the journal bearing is 4mm. The outer and inner diameters of the thrust bearing are 10mm and 4mm, respectively. Both static and dynamic air bearings are designed and tested using micro-turbo charger test rig. The static air bearing crashed at 566,000rpm due to whirl instability, and the dynamic air bearing crashed at 279,000 rpm due to non-whirl shaft vibration, which probably is a resonance vibration in a small bearing gap. Herringbone type and spiral type grooves are used for the dynamic gas bearing. Methods to increase the whirl instability frequency should be developed for static gas bearings. Methods to increase damping to pass through the resonant frequencies should be developed for the dynamic gas bearings.
社団法人日本機械学会の論文
2004-06-22