多孔質動圧スラスト・ラジアル複合軸受における潤滑特性の実験的研究

スラスト動圧形状が浮上性に及ぼす効果および複合軸受の軸振れ量に関する実験的考察

抄録

This study proposes the combination of some hydrodynamic pressure shapes formed on the end or the annular surface of oil impregnated sintered porous bearing as a DC spindle motor's bearing system. Hydro Wave Bearing or Pump In as a thrust hydrodynamic shape, and Herringbone, Three Lobed Type or Sleeve as a radial hydrodynamic shape were proposed, and the total of six kinds of combinations was produced as thrust-radial coupled bearing. It examines to optimize the hydrodynamic shape combination experimentally as thrust-radial coupled bearing by measuring the lubrication characteristics. Quantitative floatation level of unit time and shaft whirling, such as the lubrication characteristics, were examined experimentally. As experimental results, it was confirmed that quantitative floatation level leading to life-longevity of bearing and low shaft whirling were achieved by hydrodynamic pressure interaction of thrust-radial coupled bearing.