Abstract
As a method to improve the stiffness of hydrostatic bearing, we proposed the new bearing structure in which the elastically supported land displaces for bearing clearance change instead of the shaft displacement. However, self-excited vibration occurred on this bearing within a certain operating condition. Then, the stable operable range was examined from both sides of analysis and experiment. The experimental results agreed with the tendency on the analytical result, in which assumed the damping of the land. In order to perform the stable operation under the optimum condition where attains nearly infinite stiffness, it is effective to decrease the rigidity of elastic body when load is small and to increase oil viscosity under large loading condition.
