摘要
为了研究液压阀流体域内压力、速度及密封间隙对运动副密封性能的影响,本文建立了液压阀某运动副模型,基于有限元方法对于高性能旋转动密封运动副进行了数值仿真与计算。结果表明:压力值从油膜的微尺度间隙处到运动副中间处呈衰减变化,到运动副中间压力达到最小,压力变大时,泄漏量增加。受黏性摩擦力的影响,随缝隙值的增加,速度出现先变小后增大的趋势,随着缝隙值逐步增大,流经横截面的流体平均流速增大,泄漏量增大。阀芯与阀套间油膜的最优厚度取值与泄漏和摩擦所造成的总功率损失有关。
In order to study the influence of pressure,velocity and sealing gap in the fluid domain of hydraulic valve on the performance of the moving pair seal,a motion model of hydraulic valve is established in this paper.Based on the finite element method,the numerical simulation and calculation of the high-performance rotary dynamic sealing motion pair are carried out.The results show that the pressure decreases from the micro gap of oil film to the middle of the motion pair,and reaches the minimum in the middle of the motion pair.When the pressure increases,the leakage increases.Influenced by viscous friction,the velocity first decreases and then increases with the increase of the gap value.With the increase of the gap value,the average velocity of the fluid flowing through the cross section increases,and the leakage increases.The optimum thickness of oil film between the valve core and the valve sleeve is related to the total power loss caused by leakage and friction.
作者
景国权
田建辉
孙金绢
朱西薇
车飞
JING Guoquan;TIAN Jianhui;SUN Jinjuan;ZHU Xiwei;CHE Fei(School of Mechatronic Engineering,Xi’an Technological University,Xi’an 710021,China;Hubei Sanjiang Space Hongfeng Control Co.,Ltd.,Xiaogan 432000,China)
出处
《西安工业大学学报》
CAS
2019年第5期547-552,共6页
Journal of Xi’an Technological University
基金
国家自然科学基金（11302159）
陕西省自然科学基础研究项目（2018JM5099）
西安工业大学校长基金（XAGDXJJ18004）
关键词
液压阀
动密封
泄漏量
微尺度
hydraulic valve
dynamic seal
leakage
microscale
