Research on static characteristics of oil pad tiltable hydrostatic thrust bearing under eccentric load

Abstract

In most parts processing, the offset load of the worktable will be caused by many factors, such as the asymmetry of the workpiece shape and the offset of the clamping position. In this paper, the oil-cushion tilting double rectangular cavity hydrostatic thrust bearing is taken as the research object, and its static characteristics under abnormal load conditions are studied. The effects of rotation speed, offset distance and load on its static features are analyzed. The results show that the influence on the oil film pressure field under the eccentric load conditions is in descending order of load, speed, and offset distance. The effect of load and speed on the oil film pressure is positively related to the offset distance. The appropriate size of the offset distance has a specific gain on the bearing capacity improvement. The influence on the oil film temperature field under the abnormal load condition is in descending order of the rotation speed, the load and the offset distance. After the offset distance increases, the effect of load on the oil film temperature slightly increases, and the oil film temperature rise is within the safe operating range of the lubricating oil.