X^3流量特性阀瓣设计

Design of the disc with flow characteristic

从调节阀的流量特性数学表达式出发,结合阀瓣设计的基础理论和CFD仿真,为单座式柱塞调节阀设计了一种新型流量特性——X^3流量特性,并通过拟合化工生产线的具体工况,确定了表达式中流量特性形态范围、斜率调节系数。新设计的流量特性可用以弥补线性和等百分比这两种常见流量特性的调节缺陷,为对调节阀有更高可控性要求的用户提供了一种局部调节精度较高的选择。最终通过对一台X^3流量特性DN50单座式调节阀进行流量试验,验证了此设计的可行性。

In this article,proceeding from the mathematical expression of flow characteristic of control valves,and in conjunction with the basic theory of valve disc design and CFD Simulation,a new flow characteristic of single-seat control valve is developed:X^3 flow characteristic. By fitting the specific working conditions of the chemical production line,both the shape-range coefficient and the slope-adjustment coefficient of the flow characteristic in the expression are identified. The new flow characteristic can be employed to compensate for the adjustment deficiencies of two common flow characteristics-linear and equal percentage,thus ensuring the higher accuracy of local adjustment for those users with higher controllability requirements. Finally,the feasibility of the design is verified by the flow test of a single-seat DN50 control valve with X^3 flow characteristic.