液压换向阀径向稳态液动力的研究  

Radial Steady-state Flow Force of Hydraulic Directional Valve

作　　者：王晓凯 WANG Xiao-kai(Taiyuan Research Institute Co.,Ltd.,China Coal Technology and Engineering Group,Taiyuan,Shanxi 030006;Shanxi Tiandi Coal Mining Machinery Co.,Ltd.,Taiyuan,Shanxi 030006)

机构地区：[1]中国煤炭科工集团太原研究院有限公司,山西太原030006 [2]山西天地煤机装备有限公司,山西太原030006

出　　处：《液压与气动》2020年第12期114-117,共4页Chinese Hydraulics & Pneumatics

摘　　要：为进一步研究液压换向阀的径向稳态液动力,通过对液压换向阀内部流体整体建模并考虑间隙内泄,由伯努利方程得出了径向稳态液动力的求解方式;运用CFD软件Fluent进行了可视化分析,以阀对称面的x方向以及阀芯周向为切入点,详细研究了阀芯所受径向力。结果表明,由于换向阀结构仅是平面对称而并非轴对称,液体流动会在阀芯台阶和阀杆处造成不均匀分布的液动力,导致阀芯呈整体偏心趋势并产生液压卡紧力,对滑阀卡紧力补偿时应予以考虑。To further study the radial steady-state flow force of hydraulic directional valves,by modeling the overall fluid in the directional valve and considering the leakage in the gap,the solution of the radial steady-state hydrodynamic force is obtained from the Bernoulli equation;then conducted a visual analysis using the CFD software Fluent,the radial force on the spool was studied in detail in the x direction of the symmetry plane and the circumferential direction of the valve core.The study found that because the structure of the directional valve is only plane symmetry and not axisymmetric,the liquid flow will cause an unevenly distributed flow force at the spool step and the stem,witch will result in the eccentric of the spool,and generate the hydraulic clamping force;which should be considered when compensating for spool clamping force.

关 键 词：换向阀 压力 径向 稳态液动力 FLUENT 

分 类 号：TH137[机械工程—机械制造及自动化]