Numerical simulation on cavity type influence of multiple oil pad hydrostatic guide fluid state

Hydrostatic guide oil cavity of heavy CNC vertical lathe have many type, familiar oil cavity type have rectangle, sector, ellipse, I-shaped. Aim at research the influence of difference oil cavity type for hydrostatic guide fluid state, which established the 3-D entity model of rectangle and sector and ellipse and I-shaped hydrostatic guide interstitial fluid. The cavity type influence law of the guide fluid state is revealed via compute the four oil cavity type fluid state of hydrostatic guide based on numerical simulation. The result showed that the velocity of interstitial fluid gradually increase along the guide radial from inner to outer, and to reach the most in the outer edge. The result testified that the linear velocity of touch fluid for rotary wall surface directly proportional to guide radius. Based on an overall consideration of various factors, the interstitial fluid velocity field distribution of sector cavity hydrostatic guide is the most uniformity, next is ellipse, rectangle, and I-shaped, and the velocity vector graph of interstitial fluid testified that the oil cavity inner have reflux phenomena. The numerical result sincerity showed the interior fluid state of bearing. And the simulation result for project that oil cavity optimum structure design supplied theory proof.