止回阀流动特性与阀芯优化设计

Flow Characteristics of Check Valves and Optimal Design of Valve Cores

止回阀阀芯的优化设计可提高阀体的寿命与使用效果,通过对止回阀不同过流面结构的工作过程进行模拟和仿真,发现修改阀瓣与阀芯改变过流面结构,可以有效改善阀门处水体的整体流动特性。以阀体加工的工艺要求及仿真边界条件的约束为基础,对阀芯长度与阀瓣进行优化设计,得出一个能够降低涡流和射流现象、减少水流分层效果的新结构。后期的实验验证了优化后的结构具有较好的性能。

An optimum design of check valve cores helps to improve the life and service effect of the valve body. It is found that modifying valve clacks and cores to change the flow surface structure can effectively improve the overall flow characteristics of the water body at the valves by simulating the working process of check valves with different flow surface structure. Based on the technological requirements of valve body processing and the constraints of simulation boundary conditions, an optimal design can be established of the valve core length and valve clacks, thus obtaining a new structure that helps to reduce the swirling and jetting phenomena as well as the effect of water flow stratification. Subsequent experiments verify that the optimized structure is characterized with a better performance.