流体机械

2017, v.45;No.543(09) 22-26

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矿井排水用新型止回阀的流固耦合数值模拟研究
Research on Fluid-solid Coupling Numerical Simulation of New Type Check Valve for Mine Drainage

孟思佳;寇子明;
MENG Si-jia;KOU Zi-ming;Taiyuan University of Technology;The Fluid Control in Mines in Shanxi Province Engineering Technology Research Center(Laboratory);

摘要(Abstract):

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。
In order to improve the safe operation of mine water discharge system and stable work, on a disc and stem type check valve, the fluid-structure coupling mathematical model was established, through the finite element ANSYS software numerical computation of flow resistance coefficient under different opening, the internal flow field and stress strain of the check valve.The results show that the flow resistance coefficient and decreasing with the increase of relative opening degree, and the trend of change after the first sharp decline more gently.With the increase of is narrow, average pressure quickly reduce gradually leveled off after is 50%, and average speed fast increasing trend occurring after is 37.5%.After check valve flow field of average pressure stable trend all the time, it explains the design of the check valve to control pressure fluctuation has obvious effect.The equivalent stress of the disc and stem mainly in the joint of the disc and the valve stem and valve stem and valve body contact, the biggest deformation mainly appears in the disc close to the check valve outlet, intensive processing to avoid stress concentration at the maximum stress, improve the service life of the check valve.

关键词(KeyWords): 矿井排水;止回阀;流场特性;数值模拟
mine drainage;check valve;flow field characteristics;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 山西省21世纪初高等教育教学改革基金项目(2015101004)

作者(Authors): 孟思佳;寇子明;
MENG Si-jia;KOU Zi-ming;Taiyuan University of Technology;The Fluid Control in Mines in Shanxi Province Engineering Technology Research Center(Laboratory);

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