矿井排水用新型止回阀的流固耦合数值模拟研究

发布时间：2018-05-05 13:55

本文选题：矿井排水 + 止回阀　；参考：《流体机械》2017年09期

【摘要】：为了提高矿井水排放系统的安全运行和稳定工作,针对一种阀瓣与阀杆式止回阀,建立了流固耦合数学模型,通过ANSYS分析软件数值计算不同开度下的流阻系数、内部流场以及止回阀应力应变情况。结果表明:流阻系数随着相对开度的增大而递减,且变化趋势为先剧烈递减后较为平缓。随着相对开度的增加,平均压力快速地降低且在相对开度为50%以后逐渐趋于平稳,而平均速度在相对开度37.5%以后发生快速增加的趋势。经过止回阀后的流场平均压力始终保持稳定趋势,这说明本设计的止回阀对压力波动的控制具有明显的效果。阀瓣和阀杆的等效应力主要出现在阀瓣与阀杆的连接处以及阀杆与阀体的接触处,最大的变形量主要出现在阀瓣靠近止回阀出口处。在最大应力处进行加强处理避免应力集中,可以提高止回阀的使用寿命。
[Abstract]:In order to improve the safe operation and stable operation of mine water drainage system, a fluid-solid coupling mathematical model was established for a disc and stem check valve, and the flow resistance coefficient was calculated numerically by ANSYS software. Internal flow field and check valve stress and strain. The results show that the flow resistance coefficient decreases with the increase of relative opening. With the increase of relative opening, the average pressure decreases rapidly and becomes stable after the relative opening is 50%, while the average velocity increases rapidly after the relative opening is 37.5%. After the check valve, the average pressure of the flow field always keeps stable trend, which shows that the control of pressure fluctuation of the check valve has obvious effect. The equivalent stress of disc and stem mainly occurs at the junction of disc and stem and the contact between stem and body, and the maximum deformation occurs near the valve disc near the outlet of check valve. Strengthening treatment at maximum stress to avoid stress concentration can improve the service life of check valve.
【作者单位】：太原理工大学;山西省矿山流体控制工程(实验室)技术研究中心;
【基金】：山西省21世纪初高等教育教学改革基金项目(2015101004)
【分类号】：TD744

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