多路阀异形阀口结构对微动特性影响研究  

Influence of Anomalous Orifice Structure on Micro-characteristics of Multi-way Valve

作　　者：艾超[1,2] 王娟[1] 孔祥东[1,2] 赵苓[1,2] 夏庆超 

机构地区：[1]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004 [2]先进锻压成形技术与科学教育部重点实验室(燕山大学),河北秦皇岛066004

出　　处：《液压与气动》2015年第2期20-24,共5页Chinese Hydraulics & Pneumatics

基　　金：国家科技支撑计划(2014BAF02B00);国家科技支撑计划重点项目(2011BAF09B04);河北省高等科学技术研究重点项目(2011104)

摘　　要：针对负载敏感比例多路阀在小开口处流量分辨率低导致的负载窜动的问题,采用理论推导和计算流体动力学方法(CFD)仿真的方法,对主阀阀口过流面积进行了研究,获得了阀口结构对微动特性的影响规律,即减小阀芯小开口处锥角可以减小节流口面积梯度,进而优化微动特性。据此设计了一款新的阀芯,并对新旧阀芯进行实验对比研究。研究结果表明:通过减小主阀小开口处过流面积梯度可以实现流量缓慢平稳变化,提高流量控制精度,增加执行机构启动平稳性,实现比例多路阀微动特性优化。For the problem of load-floating caused by the resolution of flow-rate in the small opening of the loadsensitive proportional multi-way valve,the theoretical derivation and the computational fluid dynamic（ CFD） method are used to investigate the flowing field of the main valve orifice. The influence law of the micro-characteristics caused by the structure of the valve orifice is obtained. The reducing cone angle in the small opening of the spool valve can adjust the area gradient of the orifice and thereby optimize the micro-characteristics. The experiment is carried on to compare the old and new spools. The considerable research results are as follows： reducing the valve orifice area gradient in small openings can make the flow change slowly and steadily,improve the accuracy of flow control and optimize the micro-characteristics of the valve.

关 键 词：比例多路阀 过流面积 微动特性 

分 类 号：TH137[机械工程—机械制造及自动化]