摘要
溢流阀主阀芯的稳态液动力使溢流阀存在较大的调压偏差,降低了其静态性能指标。采用在溢流阀主阀芯(锥阀芯)上加突缘结构来补偿稳态液动力。采用CFD工具对主阀口流场进行仿真,研究突缘结构尺寸、位置及阀芯锥角对主阀芯稳态液动力补偿的影响。结果表明:突缘结构能实现阀芯液动力补偿,但随着阀芯开口量的增加,补偿会由欠补偿变为过补偿;当突缘长度为0.5 mm、距离阀座为1 mm时,液动力补偿效果最好。
The steady-state flow force of the relief valve＇s main valve makes the valve exist large pressure regulating deviation, it has lower the static property of the valve. The idea of compensating the steady-state flow force by placing a flange structure on the main valve （poppet valve） was adopted. The main valve＇s fluid field was simulated by using CFD, to research the effect of dimension, posi- tion of the flange and cone angle of poppet valve on compensation of steady-state flow force. The results show that the flange structure can compensate the flow force of the valve, but with the increasing of the valve opening, the compensation will change from undercompensation to overcompensation. The compensation effect will reach the best when the length of flange structure is O. 5 mm and the dis- tance from the valve seat is 1 ram.
出处
《机床与液压》
北大核心
2013年第19期22-24,28,共4页
Machine Tool & Hydraulics
基金
中央高校基本科研业务费专项资金资助项目(SWJTU11CX025)
关键词
溢流阀
锥阀芯
稳态液动力
突缘结构
补偿
Relief valve
Poppet valve
Steady-state flow force
Flange structure
Compensation
