Numerical Calculation of Static Holding Flow of Hydraulic Stepped Cylinder
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摘要: 以控制棒水力驱动系统为研究对象,采用商用流体力学计算程序CFX5对水力步进缸槽对孔部位、排气孔和迷宫漏流分别进行了数值计算,以获得步进缸的静态保持流量。数值计算结果表明:槽对孔部位的流量是水力步进缸静态保持流量的主要部分,决定了水力步进缸静态保持流量随外套位置的变化规律;排气孔流量和迷宫流量所占的份额很小,其对步进缸静态保持流量的影响也很小;随着温度升高,水力步进缸的最小静态保持流量和最大静态保持流量都逐渐增大,这与实验结果吻合。Abstract: This study used the Computational Fluid Dynamics(CFD) program CFX5 to calculate the flow in the chamfer holes,exhaust hole and maze to achieve the static holding flow of the hydraulic stepped cylinder.The results indicated that the flow through the chamfer holes was the main part of the static holding flow,which determined the changing rule of the static holding flow with the change of the outer tube position.The flow through the exhaust hole and maze was relatively small,and the effect on the static holding flow was also small.The maximum and minimum static holding flow increased with the increase of temperature,which agreed well with the experimental results.
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