带U形节流槽的滑阀稳态液动力研究  

Investigation on steady-state flow force of spool valve with U-grooves

作　　者：方文敏[1,2] 成琳琳[1] 傅新[1] 周华[1] 杨华勇[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,浙江杭州310027 [2]解放军炮兵学院,安徽合肥230031

出　　处：《浙江大学学报（工学版）》2010年第3期574-580,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家"973"重点基础研究发展规划资助项目(2006CB705400);国家杰出青年科学基金资助项目(50425518);教育部新世纪优秀人才资助项目(NCET-06-0529)

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.It is difficult to accurately predict the steady-state flow force of spool valve with U-grooves by the traditional theoretical formulae of flow force. To resolve the problem,a platform with high-precision experimental apparatus and system was built to investigate the steady-state flow force with a multi-way valve as objective,which aimed at obtaining the characteristics of steady-state 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 steady-state flow force with U-grooves 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 steady-state 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 steady-state flow force together with the pressure difference matched the experimental results well.

关 键 词：稳态液动力 三位六通阀 U形节流槽 流场仿真 

分 类 号：TH137[机械工程—机械制造及自动化]