Application of a Mixed Lubrication Model for Hydrostatic Thrust Bearings of Hydraulic Equipment

Abstract

On mixed and fluid film lubrication the characteristics of hydrostatic bearings for hydraulic equipment are studied numerically. By applying a mixed lubrication model derived in a previous paper to the bearings, we clarify the effects of the surface roughness, eccentric or moment loads, supply pressure and speed of rotation on the friction, flow rate, and power losses. Introducing the concept of a ratio of hydrostatic balance, we show that the minimum power loss is given as the ratio becomes close to unity.

Numerical Simulation of a Slipper with Retainer for Axial Piston Pumps and Motors under Swashplate Vibration

“…The author constructed a slipper model that included the revolution and spin motion of the slippers in a wide range from fluid film to mixed lubrication 5) and performed timedependent, three-dimensional simulation 6) . In the present study, by adding a model for swashplate vibration and retainer constraint, the motion and characteristics of the slippers under an unsteady state are numerically shown.…”

Loading Capacity Analysis of Hydrostatic Oil Pad Based on Fluid-structure Coupling

“…WANG [4][5] studied the influence of oil film, the flow rate to the stiffness of the hydrostatic thrust bearing by theory and experiment. KAZAMA [6][7] proposed an optimum design method for the elastic deformation of the oil lubricated nonmetallic bearing. Experimental study has proved that the change of hydraulic pressure can cause the elastic deformation of the structure by PANG [8].…”

Relation between Sliding-Part Temperature and Clearance Shape of A Slipper in Swashplate Axial Piston Motors

“…Kazama and Yamaguchi investigated circular hydrostatic thrust pad bearings theoretically 18) and experimentally 19) . 20) on the hydrostatic bearings.…”