某双阀芯电液比例多路阀主阀进口节流流场及阀口压降特性研究

Research on Flow Field and Pressure Drop Characteristics of Main Valve Inlet Throttle of a Dual Spool Electro-Hydraulic Proportional Multi-way Valve

以某系列双阀芯电液比例多路阀为研究对象,采用CFD流场仿真技术和PIV可视化测速技术对不同阀口开度和流量下的主阀沿进口流道、节流口、阀腔的流场进行了流体仿真和试验可视化研究。应用Fluent软件仿真研究了主阀进口节流流场分布并得出阀口压降特性;采用PIV试验研究的手段对流场分析结果加以验证,应用2D-PIV技术获得主阀腔内部一个截面上的流场分布,并通过相似理论计算得出阀口压降特性。CFD流场仿真和PIV试验结果表明:该双阀芯电液比例多路阀主阀出油环形腔内会形成较大旋涡,且阀口开度和流量对主阀进口节流内部流场结构和阀口压降特性有重要的影响。研究结果对定性分析双阀芯电液比例多路阀主阀内能量损失和噪声、主阀的结构和流道的设计以及优化具有重要实际意义,为CFD技术和PIV技术在双阀芯多路阀领域的应用研究提供了参考。

Taking a dual spool electro-hydraulic proportional multi-way valve as the research ob-ject ,the flow field of main valve along the inlet flow channel, the orifice and valve cavity under differ-ent valve opening conditions and flow rate were studied by simulations and experiments using CFD simulation and PIV technology. The flow field？ the main valve inlet throttle and the pressure drop characteristics were obtained and the results of flow field analysis were verified by means of PIV test. 2D-PIV technology was used to obtain the flow field distribution on a cross section of the main valve cavity？ and the valve port pressure drop characteristics were calculated by similar theory. The results show that a larger vortex may be formed along the main valve outlet ring cavity？ and the valve open-ing conditions and flow rate have important influences on both inlet throttle internal flow structure of the main valve and valve pressure drop characteristics. It has great practical significance for qualitative analysis of energy loss,noise,design and optimization of structures as well as flow channels of the main valve. It also provides a reference for the applications of CFD simulation and PIV technology in the field of dual spool multi-way valves.