渣浆泵切割叶轮外径改变扬程
    由泵的切割定律可知，当转速一定时，流量和扬程随叶轮外径切割大小近似地成一次、二次方变化。当泵叶轮外径在允许范围内切割时,则H - Q性能曲线向左下方移动，如图1-55所示。若管路特性不变时，就可得到不同的工作点，使流量减小。这种调节方法虽然没有附加能量损失,但叶轮切割后不能再恢复原有渣浆泵特性故适用于长期调节。另外，式(1- 70)给出了切割叶轮的泵特性方程。

Slurry pump cutting impeller outside diameter change head

According to the cutting law of the pump, when the rotating speed is fixed, the flow rate and the head change approximately once and twice with the cutting size of the outer diameter of the impeller. When the outer diameter of the pump impeller is cut within the allowable range, the H-Q performance curve moves to the lower left, as shown in figure 1-55. If the characteristics of the pipeline remain unchanged, different working points can be obtained to reduce the flow. Although this method has no additional energy loss, it can not restore the original slurry pump characteristics after impeller cutting, so it is suitable for long-term regulation. In addition, equation (1-70) gives the pump characteristic equation of cutting impeller.