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| Investigation on steady-state flow force of spool valve with U-grooves |
| FANG Wenmin1,2, CHENG Linlin1, FU Xin1, ZHOU Hua1, YANG Huayong1 |
1.State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;
2. Artillery Academy, Hefei 230031, China |
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Abstract It is difficult to accurately predict the steadystate flow force of spool valve with Ugrooves by the traditional theoretical formulae of flow force. To resolve the problem, a platform with highprecision experimental apparatus and system was built to investigate the steadystate flow force with a multiway valve as objective, which aimed at obtaining the characteristics of steadystate flow force in different flow directions and the pressure and flow rate characteristics of valve notch. The flow field in the valve was also simulated with computational fluid dynamic (CFD). Both the experimental and simulation results show that the steadystate flow force with Ugrooves tends to be negative, which means that the valve notch tends to be open no matter in single in/out flow direction or in double flow directions. The coupling value of the steadystate flow force in the case of single in/out flow direction of the 3/6 valve is almost the same as that in the case of double flow directions. The simulation results of the steadystate flow force together with the pressure difference matched the experimental results well.
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Published: 20 March 2012
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带U形节流槽的滑阀稳态液动力研究
摘要: 传统液动力理论计算公式难以准确预测带U形节流槽滑阀的稳态液动力,针对该问题以多路阀为测试对象,搭建高精度液动力测试平台,试验获得不同流动方向下的稳态液动力和阀口压力、流量特性,并用计算流体力学（CFD）对阀内流场进行了仿真.试验和仿真数据表明,带U形节流槽的滑阀的稳态液动力在单向流出流入和在双向进出油情况下均会出现负值,即使阀口趋于打开；三位六通阀双向进出油稳态液动力值与单向流出流入稳态液动力耦合值基本一致；仿真所得稳态液动力值和压差值与试验值吻合良好.
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