Abstract:Due to its good carrying performance, low frictional resistance, high precision and stability, the hydrostatic support system becomes the core component in high-precision CNC machine tools. The study of the oil cavity's carrying stability is important in order to improve the precision of machine tools. In this paper, the flow and the bearing carrying capacity of the cycloidal hydrostatic oil cavity in a hydrostatic turntable system is numerically studied for rotating speed ranging from 0 to 5m/s of the turntable and under varied boundary conditions. The results show that the static bearing capacities of the oil cavity are reduced with the increase of oil film thickness. By increasing the lubricant viscosity, the effect of vortex will be weakened and the stability of the oil cavity will be enhanced. With the increase of the oil cavity's depth and the inlet radius, the vortex effect will be enhanced and the stability of the oil cavity reduced. The carrying capacity of the oil cavity diminishes with the increase of the oil film thickness. The oil cavity pressure due to the turntable's rotation is unevenly distributed and increases along the direction of the turntable's motion. With the increase of the turntable speed, the location and the size of the vortex vary in the oil cavity flow field and the strength of the vortex nearby the entrance is gradually weakened and the vortex goes away from the entry. The distribution of the pressure is determined by the location of the vortex. When the vortex is near the wall, the wall pressure will increase at that location. Otherwise, the wall pressure will decrease.
刘赵淼;张成印. 不同边界条件下液体静压油腔流场与承载稳定性数值研究[J]. , 2011, 29(19): 40-46.
LIU Zhaomiao;ZHANG Chengyin. Numerical Simulation of Flow Field and Carrying Stability in Hydrostatic Oil Cavity Under Different Boundary Conditions. , 2011, 29(19): 40-46.