flow rate and fast response

RU Jing-wei，XIANG Zhong，SHI Wei-min

（Zhejiang Sci-Tech University，Hangzhou 310018，China）

Abstract：Aiming at solving the problem of long switching time for Pneumatic on/off valve with large flow rate，the flow- rate characteristics of the high speed off-on valve was analyzed，the relation of working air gap and spool diameter was established；the action of the high speed off-on valve was analyzed，a coupling model was designed to simulate the process；Ansoft Maxwell2D was applied to study the characteristics of solenoid in that，the influence of the armature center hole size，thickness of the armature and winding turns for the on-off valve opening time was discussed. An optimized valve with the balance of large rate and fast response was proposed based on the analysis. The results indicate that the inlet pressure is 7 bar，the maximum flow rate is 720 L/min and the switching time is only 9.5

ms after optimized.

Key words：high-speed off-on valve；Ansoft；switching time；large flow rate