The ball valve has been widely used in many industries. Adjustable ratio is a core parameter of the valve design, which characterizes the adjustment accuracy of the valve. Type-V ball valves on the market due to limitations of machining process, the highest adjustable ratio is only approximately 30–50. This study designs a special adjustable ball valve with ultra-high adjustable ratio, and analyzes its flow characteristics. The incision of the ball valve is designed based on the plane triangle projection, and optimized by Artificial Fish Swarm Algorithm (AFSA) to maximize the adjustable ratio. The optimized design parameters are changed according to the engineering principles, and the effects of these changes on the flow characteristics are researched by Computational Fluid Dynamics (CFD) simulation. The physical valve is made according to the modified design parameters. And its flow characteristics are experimented. The work in this paper provides a reference for the valve design in the flow characteristics.

球阀已广泛应用于许多行业。可调比是阀门设计的核心参数，它代表了阀门的调节精度。由于加工工艺的限制，市场上的V型球阀的最高可调节比只有大约30–50。本研究设计了一种具有超高可调比的特殊可调式球阀，并分析了其流量特性。球阀的切口是基于平面三角形投影设计的，并通过人工鱼群算法（AFSA）进行了优化，以最大程度地提高可调节比率。根据工程原理更改优化的设计参数，并通过计算流体动力学（CFD）仿真研究这些更改对流动特性的影响。物理阀是根据修改后的设计参数制成的。并对其流动特性进行了实验。本文的工作为流量特性的阀设计提供了参考。