Is there a relationship between impeller design, maximum and minimum diameters, and flow rate?
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Is there a relationship between the design diameter and maximum/minimum diameter of the impeller listed in the pump data sheet and the pump’s flow rate? Help needed
It is directly proportional to flow rate, in proportion to the square of head, and in proportion to the cube of power
Refer to the impeller design calculation formula.
From an operational perspective (without considering impeller design), by looking at the pump’s performance curve, at the same flow rate, the larger the impeller diameter, the higher the head.
The impeller diameter is related to the pump’s head.
For users, the design diameter is the one that meets their performance requirements; for manufacturers, the maximum diameter is the design diameter that corresponds to the highest performance of the pump. The minimum diameter is the smallest allowable diameter at which the performance of the pump declines to an acceptable level.
That’s right, it is indeed the case. In fact, aside from large companies like Sulzer and KSB, the impeller diameter indicated in the data sheets of ordinary manufacturers is usually an estimate. . . .