磁流变换向阀流量-压差特性研究

Research on Pressure-flow Characteristics of Magnetorheological Directional Valve with Fluent

为改善换向阀流量-压差特性,提升换向阀节能效果,基于磁流体磁流变效应以及惠斯通电桥原理,设计了一种磁流变换向阀。建立多级径向流磁流变阀的压降数学模型和磁流变换向阀的流量-压差数学模型。使用Fluent软件对磁流变换向阀进行了流量-压差特性分析,发现磁流变换向阀可通过调整磁流变导阀输出的控制压力调节主阀阀芯开口度大小,仿真得到不同阀芯开口度下流量-压差特性曲线。测试了磁流变换向阀的流量-压差特性。分析结果表明:磁流变换向阀较相同通径电磁换向阀流量-压差特性有显著提升,阀芯有效行程扩大为5mm。

In order to improve the flow-pressure difference characteristics of the directional valve and enhance the energy saving effect of the directional valve,a magnetorheological directional valve was designed based on the magnetorheological effect and Wheatstone bridge principle.The pressure drop mathematical model of multi-stage radial flow MRF valve and the flow-pressure difference mathematical model of MRF directional valve are established.The flow and pressure difference characteristics of MRF directional valve are analyzed by using Fluent software.It is found that the MRF directional valve can adjust the opening of the main valve core by adjusting the output control pressure of the MRF pilot valve,and the flow-pressure difference characteristic curve under different spool opening degrees is obtained by simulation.The flow and pressure difference characteristics of MRF directional valve are tested.The analysis results show that the flow-pressure difference characteristics of the MRF directional valve are significantly improved compared with the electromagnetic directional valve with the same diameter,and the effective stroke of the valve core is expanded to 5 mm.