摘要
为了解决动态流量平衡阀流量控制精度无法达到要求的问题,建立了动态流量平衡阀动力学模型以及阀芯运动方程,数值模拟了相同口径和不同口径平衡阀阀芯处于不同位移下的三维流场模型,对比试验与数值模拟的阀芯位移误差和压差位移流量特性曲线,获得了线弹性不等值力变化规律,确定了不等值力修正系数,并优化了开孔型线.研究结果表明:通过引入线弹性不等值力修正系数,优化阀芯可变开孔后,减小了阀芯实际位移与理论位移间的误差,使试验与数值模拟的流量特性曲线趋于一致,并使流量控制精度满足±5%的误差要求.
In order to solve the problem that the flow rate control of a dynamic flow balance valve cannot meet the precision requirement,a dynamic model for the balance valve and the motion equation of the valve core were developed. Then,the three-dimensional flow model of the valve core with the same diameter and different diameters,both under different displacements,were solved by numerical simulation. Through comparisons in terms of the displacement error and the flow characteristic curve between the actual test and numerical simulation,the variation rule and correction factor of the linear elastic nonequivalence force were obtained,and the opening profile line was optimized. The results show that after the variable opening of the valve core is optimized by the correction factor of linear elastic nonequivalence force,the displacement error of the valve core between test and theory is reduced; the flow characteristic curve obtained by numerical simulation is consistent with the one obtained by actual test,and the flow control precision can satisfy the error requirement of less than ±5%.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2015年第6期1150-1155,共6页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(51349008)
甘肃省高校基本业务费资助项目(20146302)
关键词
平衡阀
线弹性不等值力
流量控制精度
数值模拟
balance valve
linear elastic nonequivalence force
flow rate control
numerical simulation
