【作者】 田振东； 郭晓霞； 黄家海； 权龙；

【Author】 TIAN Zhendong;GUO Xiaoxia;HUANG Jiahai;QUAN Long;School of Mechanical Engineering, Taiyuan University of Technology;

【机构】 太原理工大学机械工程学院；

【摘要】 锥阀作为液压系统的核心控制元件,其流量特性与阀口过流断面的大小有密切关系。而目前在计算锥阀过流断面时,均采用统一计算公式,即由阀座直角顶点向阀芯锥面做垂线,由此所形成的圆台侧表面面积的解析表达式。对于锥台形锥阀,在阀芯大行程位移时,由阀座直角顶点向阀芯锥面做垂线,无法在阀芯锥面上找到垂足,即传统面积公式不再适用。本文利用计算流体动力学软件Fluent仿真研究全锥锥阀与锥台形锥阀两种流场在相同条件下的不同流态,从流场的角度研究两种锥阀在不同行程时阀口的流量特性,通过流场分析与理论推导相结合的方法,推导出锥台形锥阀在大行程时过流断面的位置与大小。更多还原

【Abstract】 As one of the key control elements of hydraulic system, the flow characteristics of the poppet valve closely relate to the flow cross-section. Now a unified formula is adopted to calculate the poppet valve flow cross-section, which is analytical expression of the area of side surface of a truncated cone which is formed by making a vertical line from right angle of the seat to conical surface of spool. However when the displacement of poppet valve owned incomplete conical surface is large, it’s unable to find pedal on the conical surface, namely the area expression is inappropriate. In this paper, the different flow patterns of poppet valve owned complete conical surface and poppet valve owned incomplete conical surface under same condition are simulated by combing computational fluid dynamic software Fluent. The flow characteristics of the two kinds poppet valve at different stroke are researched in the perspective of flow field. And the position and flow scale of flow area when the displacement of spool is larger is deducted through the combination of flow field analysis and theoretical derivation.更多还原