水压球阀在不同阀口形式下的流体作用力研究

Flow Forces of Water Hydraulic Ball Valve Under Different Throttle Configurations

针对水液压直驱球阀,研究了球阀的阀座上是否存在倒角的2种不同阀口形式对阀芯所受稳态流体作用力特性的影响;采用基于COMSOL Multiphysics的CFD仿真的方法,分别对2种阀口形式下,阀芯在不同阀口开度、不同进出口压差下所受稳态流体作用力进行了数值求解,并对比了2种阀口形式下的通流流量大小,最后,对仿真结果进行了网格无关性验证。结果表明,阀口形式不同时,阀芯所受的稳态流体作用力的大小和方向不同,阀口的通流流量不同;网格无关性验证仿真结果是可信的,此研究可用于指导直驱球阀的结构优化设计。

Focus on the water hydraulic direct-drive ball valve,the influences of configurations with or without a chamfer on valve seat on the steady flow force characteristics acting on the valve core are studied.Through using Computational fluid dynamics(CFD)method based on the COMSOL Multiphysics,steady flow forces and flow rate in different spool positions and different pressure differences between inlet and outlet can be obtained.Finally,the mesh independence verification is conducted.The results reveal that the direction and value of flow force acting on valve core change with different throttle configurations,and the value of flow rate change with different throttle configurations.The results can be used to guide the structural optimization design of the direct-drive ball valve.Besides,the results of mesh independence verification demonstrate that the simulation results are reliable.