矿井泥浆泵泵阀流场的数值分析

Numerical Analysis on Flow Field of Pump Valve of Mine Slurry Pump

根据泵阀运动精确微分方程和利用计算流体动力学方法(CFD)构建泵阀11种工况下的仿真模型,并对每种工况下泵阀内部的流场进行数值模拟分析。结果表明:阀内流速随泵阀开口度的增加而减小,随阀盘上升速度的增加而增大,流速从入口到出口逐渐增大;泵阀开启过程,泵阀内的流速不稳定,但在泵阀关闭过程中,流速逐渐增大,且增加越来越快;靠近阀盘侧的流速大于靠近阀座侧的流速;在阀盘底面中心附近流速接近0。这些规律为研究泵阀失效机理和优化泵阀结构提供理论依据。

The simulation models of the pump valve are set up under 11 kinds of working conditions according to the exact differential equation and the computational fluid dynamics （CFD）, and analyzing flow field in each case in the pump valve. The results show that the flow velocity drops in the pump valve as increasing to the value of the valve opening ,and increasing as increasing to the rising velocity of the valve disc. The flow velocity gradually increased from the inlet to the outlets in the pump valve. The flow field is unstable in the process of pump valve opening, but the velocity accelerated increases in the process of valve closing. The flow velocity near the side of the valve plate is greater than the side of the valve seat. The flow velocity closes to zero near the center of the valve plate. These conclusions can provide theory basis for research on the failure mechanism and structure optimization of the pump valve.