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叶轮与蜗壳的面积比: 这种面积比(图1和图2)的重要性在于:在普遍使用后弯叶片的情况下,水流旋转速度由叶轮本身转动速度和流过叶轮内部与转动方向相反的水流相对速度这两者的关系来决定。我们可按经验考虑两台具有相同转速和相同叶轮直径的泵。第一台泵具有很大的蜗壳喉部和很窄的叶轮泵最佳效率时流量由叶轮出口面积和蜗壳喉部面积的组合来决定,叶轮出口面积
The area ratio of the impeller to the volute: The importance of this area ratio (FIGS. 1 and 2) is that, in the case of commonly used back blades, the speed of rotation of the water flow is determined by the speed of rotation of the impeller itself and the speed of rotation of the impeller through the inside and the direction of rotation The opposite of the relative speed of water flow between the two to decide. We can empirically consider two pumps with the same speed and the same impeller diameter. The first pump has a large volute throat and a very narrow impeller pump flow rate is determined by the combination of impeller exit area and volute throat area, the impeller exit area