非能动梭式防水击止回阀的降噪特性研究

摘要

The operating principle of the viscous fluid damper in passive shuttle-type anti-water-attack check valve was analyzed. The flow field of the check valve was simulated with ADINA software. The results show that the variation of velocity and the pressure distribution within the valve is axially symmetric and the function of noise reduction as well as the shock absorption is obvious. After modeling for the valve and simulating with MATLAB software, the results show that the opening and closing time can be adjusted by the viscous fluid damper, and the pressure of water hammer is made to reduce to the minimum, which is basically anastomosis with the experiment. Therefore, the water attack damage to pressure pipeline can be weaken effectively by the viscous fluid damper and it is significant for the protection of pressure pipeline.%分析黏滞流体阻尼器在非能动梭式防水击止回阀中的工作原理,利用ADINA软件对非能动梭式防水击止回阀的流场进行仿真分析.结果表明:非能动梭式防水击止回阀内液体的流速大小变化以及压力分布都是轴向对称的,具有明显的减震降噪作用.建立非能动梭式止回阀的数学模型并在MATLAB中进行仿真,结果表明:黏滞流体阻尼器可以调整阀的开启与关闭时间,使水锤的压力降到最低,这与试验结果基本吻合.因此,黏滞流体阻尼器可以有效削弱水击对压力管道的破坏作用,这对保护压力管道有一定意义.