不同过流面积大流量液控单向阀反向开启特性研究  

Reverse Opening of Large-Flow Pilot-Operated Check Valve with Different Flow-Area

作　　者：刘磊[1] 赵继云[2] 石高亮[2] 

机构地区：[1]徐州工程学院机电学院,江苏徐州221000 [2]中国矿业大学机电学院,江苏徐州221000

出　　处：《机床与液压》2016年第23期77-80,共4页Machine Tool & Hydraulics

基　　金：高等学校博士学科点专项科研基金(20130095110012)

摘　　要：为了改善大流量液控单向阀的动态特性,采用流体动力学分析方法对大流量液控单向阀进行流场分析,研究了大流量阀工作时流道内流体的压力、液体相的变化情况。实验分析了大流量液控单向阀的动态特性和功率谱,结果表明:在大流量液控单向阀反向开启的过程中,过流面积越大,卸载时间越短,流量上升越快,空化指数越低。但过流面积31.2mm^2时通流能力最强,且压力波动并不呈线性降低的规律。In order to improve the dynamic characteristics for large-flow pilot-operated check valve, the flow field of large-flow pilot-operated check valve was analyzed using fluid dynamics analysis method. The variation instance of pressure and liquid phase was investigated in operation of the large-impact-flow valve. At last, the dynamic characteristics and power spectrum of large-flow pilot-operated check valve were analyzed by experiments. The results indicate that in reverse opening of the check valve, the greater the flow-area is, the shorter the unloading time, and the faster the flow rise, and the lower the cavitation index are. But the flow capacity is strongest when flow-area is of 31. 2 mm^2 , and the rule of pressure fluctuation is not a linear decreasing.

关 键 词：高压大流量 反向开启 动态特性 过流面积 空化 

分 类 号：TH137[机械工程—机械制造及自动化]