梭式止回阀水锤防护特性的数值分析  

Numerical Analysis on Characteristics of Protection Against Water Hammer of Shuttle-type Check Valve

作　　者：张健平[1] 赵周能[2] 曾祥炜[1] 

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621010 [2]西南科技大学,四川绵阳621010

出　　处：《流体机械》2015年第11期16-21,共6页Fluid Machinery

基　　金：国家自然科学基金项目(51308480)

摘　　要：根据梭式止回阀的结构特点和工作原理，推导出梭式止回阀的边界条件，建立了完整的用于分析水力过渡过程的梭式止回阀水锤数学模型，通过编程计算分析了2种水力过渡过程。算例结果表明：（1）为了达到较好的水锤防护特性，阀门关闭时间应在2—3s之间为宜；（2）完全关阀后逆流量为零，可以防止泵飞逸反转；（3）在关闭的过程中，泵出口处的水锤压头随着阀门的关闭而不断地降低，具有较好的水锤防护特性。Its boundary conditions were derived based on the structure and operation properties of the shuttle-type check valve. The mathematic model of the fluid transient process of the shuttle-type check valve pipeline system was established. The two process of hydraulic transient were calculated. The results that obtained from calculating examples were as following： （ 1 ） The closing time of shuttle check valve should be between 2s and 3s for achieving better features of water hammer protection. （2）The shuttle-type check valve can prevent runaway reverse of pump because the closed reflux quantity is zero after the shuttle valve closed fully. （3） Pump outlet pressure head decreased constantly with the closing of the shuttle-type check valve. Therefore, the shuttle-type check valve may protect effectively water hammer.

关 键 词：梭式止回阀 数值分析 水锤防护 水力过渡过程 

分 类 号：TH137.52[机械工程—机械制造及自动化] TQ027.12[化学工程]