基于AMESim的两自由度高频激振转阀的仿真研究

Simulation of High Frequency Excitation Rotary Valve with Two Degrees of Freedom Based on AMESim

传统的伺服阀大部分都是滑阀式,虽然控制精度高、性能稳定,但其工作频宽有限,难以满足高频大流量液压系统的需求。为此,提出一种两自由度的高频激振转阀。首先介绍其结构与工作原理,并根据流体连续性方程、阀口流量方程等理论推导出转阀的数学模型和提出提高激振频率的方法。然后采用AMESim建立高频激振转阀的仿真模型,分析系统压力、系统流量和阀口面积的影响,发现转阀阀口的流量与压力都跟随系统压力和阀口面积的增大而提高,但两者都不受系统流量的影响。

Most of the traditional servo valve is valve type. Although it has the high control precision, stable performance,its working bandwidth is limited. So it is difficult to meet the demand of high frequency and large flow hydraulic system. In or- der to solve this problem, a high frequency excitation rotary valve with two degrees of freedom is proposed, Firstly, the struc- ture and the working principle of this valve are introduced, the mathematical model of the rotary valve is derived according to the theory of fluid continuity equation and valve orifice flow equation and the way of improving the excitation frequency is proposed. Then, a simulation model of high frequency excitation rotary valve is set up by using AMESim. The effect of different system pressure, different system flow and different valve orifice area are analyzed. It is found that the flow and pressure of the valve port is increased with the increase of the pressure of the system and the area of the valve orifice, but both of them are not affected bv the flow of the system,