2209 小型マイクロガスタービン用ラジアル・スラストフォイル軸受の試作  [in Japanese] Prototyping of Radial and Thrust Foil Bearing for Small Size Micro Gas Turbines  [in Japanese]

Recently, much attention is paid to foil bearings for micro gas turbine use because these bearings are indispensable elements for realizing maintenance free small size gas turbines. We designed and manufactured a small size radial and thrust foil bearing for the shaft the size of which is 20mm in diameter. In this test apparaturs, the shaft is equipped with radial turbine blades and is driven by compressed air. As a result, we succeeded to operate it at the speed of 60000rpm and measured vibration characteristics.