オフセット二円弧軸受の最適形状に関する研究

抄録

A journal bearing is a mechanical element that supports the radial load acting on a rotating shaft by means of a fluid film filled in the gap between the shaft and the bearing. It is known that the stability of the bearing is improved by making it non-circular in shape. However, although the stability of an offset double-arc bearing with a different pad angle is better than that of a circular bearing, the optimum shape has not yet been determined. In this study, the optimum shape was searched for by numerical analysis, and the effects of various parameters on stability were investigated. By combining the preload and offset coefficients, the stability limit speed is increased. In this case, however, the effect of the installation angle on the stability is small.