Mathematical Model of Spool Valve with Rectangular Grooves

带有矩形槽滑阀的数学模型分析

Received: 12 April 2017

Abstract

A spool valve of aerospace hydraulic breaks down because of uneven pressure distribution between sleeve and spool, which is called as hydraulic lock. The rectangular grooves on the spool surface can effectively weaken the lateral force, thereby preventing the hydraulic lock. So the mathematical model of spool valve with rectangular grooves is established according to the Navier-Stokes equations based on the cylindrical coordinate system. To verify the effectivity of the mathematical model, the numerical simulation is compared and used to modified the mathematical model.

摘要

航空、航天液压系统中滑阀的阀芯阀套间隙中的侧压力分布不均时，会出现液压卡紧现象，造成液压系统故障。阀芯上的均压槽可以有效地减弱间隙中分布不均的侧压力，防止出现液压卡紧。基于圆柱坐标系下的纳维-斯托克斯（N-S）方程，建立了带有矩形槽的阀芯阀套间隙侧压力分布的数学模型。为了验证数学模型的准确性，通过数值模拟进行对比，并修正了该数学模型。