中文摘要：

多路阀以其高集成度被广泛应用于工程机械领域,其中阀口形式对多路阀流量控制特性具有重要影响。对于阀体上开有孔道沉槽、节流面为常见的圆柱面和圆锥面两种滑阀阀口形式的多路阀,根据其结构特征及内部流场压力分布和速度变化情况,利用等效阀口面积理论,推导了圆柱面阀口和圆锥面阀口过流面积计算公式。利用流场仿真对计算结果进行了修正,采用实验手段验证了计算结果的准确性。研究结果对滑阀阀芯的多路阀设计及性能预测具有一定参考价值。

英文摘要：

Multiple valve with its high degree of integration was widely used in the field of engineering machinery,where the valve port form possessed a very important impact on flow control characteristics.Aiming at the cylindrical and conical valve orifice of the spool valve with grooves on the valve body,and based on the structural characteristics and pressure distribution and velocity changes of the internal flow field,and with the equivalent orifice area theory,the calculation equations of orifice area of the cylindrical and conical valve orifice were proposed and analyzed.The results were corrected by the flow field simulation,and the accuracy of the results was verified by experiments.The study results have some reference values for the design and performance prediction of the hydraulic master valve.