摘要
针对油液中固体颗粒造成的阀芯滞卡现象,该文以液压滑阀配合间隙为研究对象,探究不同粒径颗粒对阀芯运动滞卡的影响。搭建滑阀滞卡力沿程测量实验台,对阀芯所受滞卡力进行测量,并运用Fluent软件的欧拉模型对不同粒径颗粒在配合间隙中的体积分布进行仿真。结果表明:不同粒径的颗粒进入单边尺寸为0.6 mm的间隙,阀芯所受滞卡力呈脉动变化;随着颗粒粒径的增大,阀芯所受滞卡力呈现增大趋势,当粒径达到间隙尺寸的70%~90%时,滞卡力迅速增大,最大滞卡力达到19 N;固体颗粒在配合间隙中进口段分布较多,出口段分布较少,且颗粒粒径越大,在间隙中的体积分布越多。
Aiming at the clamping phenomenon of valve core caused by solid particles in oil,this paper focuses on fitting clearance of sliding valve,in order to explore the influence on the movement of valve core with different particle size.The experimental test was built to measure clamping force along motion of sliding valve.The Euler model of Fluent was used to simulate volume distribution of different particles size in fitting clearance.The results shows that:the particles with different size enter clearance at unilateral size of 0.6 mm,and the clamping force caused by the particles presents pulsating changes.As particle size increases,the clamping force increases.When particle size reaches 70%-90%of clearance size,the clamping force increases rapidly,and the maximum clamping force reaches 19 N.In fitting clearance,solid particles are more distributed in inlet section and less distributed in outlet section,and the larger particle size,the more volume distribution in the clearance.
作者
徐瑞
范帅
袁清云
XU Rui;FAN Shuai;YUAN Qing-yun(Lanzhou University of Technology,College of Energy and Power Engineering,Lanzhou 730050,China;Gansu Province Research Center of Hydraulics and Pneumatics Engineering Technology,Lanzhou 730050,China)
出处
《液压气动与密封》
2021年第5期37-40,43,共5页
Hydraulics Pneumatics & Seals
基金
国家自然基金项目(51575254)。
关键词
液压滑阀
固体颗粒
粒径
滞卡现象
hydraulic sliding valve
solid particles
particle size
clamping phenomenon
