Influence of the Oil Cavity Depth on Dynamic Pressure Effect of Hydrostatic Thrust Bearing

The gap fluid of hydrostatic thrust bearing is studied in this dissertation. By applying computational fluid dynamics and theory of lubrication, and establishing three-dimensional solid model and mathematical model of the gap fluid of hydrostatic thrust bearing, analyzing synthetically three-dimensional pressure distribution of the gap fluid between hydrostatic guideway and the rotary table by using CFD software FLUENT, that reveals the law of the oil cavity depth affecting dynamic pressure effect of hydrostatic thrust bearing. The results show that dynamic pressure raises first and then declines with deepening of oil cavity when oil film thickness is given, dynamic pressure reaches extremely large value in some one oil cavity depth, and the value of oil cavity depth with the maximum bearing capacity is obtained. The results have an important directive significance for the optimization of hydrostatic bearing oil cavity.