There is a clear relationship between the head of the centrifugal pump and the speed, that is, the head of the centrifugal pump is proportional to the square of the speed. This means that when the speed of the centrifugal pump increases, its head will also increase in proportion to the square of the speed.
Head is an important performance index of centrifugal pump, it measures the pump can overcome the liquid's own gravity, friction and other resistance to pump the liquid from the inlet to the outlet height difference. In the working process of the centrifugal pump, the size of the head directly affects the performance of the pump and the liquid transport capacity.
Speed, as another key parameter of the centrifugal pump, refers to the rotation speed of the pump shaft per minute. The change of speed will directly affect the rotating speed of the impeller, and then change the flow state of the liquid in the pump and the centrifugal force generated. When the speed increases, the impeller rotates faster and the centrifugal force generated is enhanced, allowing the liquid to obtain greater kinetic energy and pressure, thus overcoming greater resistance to be transported to a higher position.
In addition to the speed, the head of the centrifugal pump is also affected by a variety of other factors, including the design of the pump, structure, impeller diameter, blade number, blade shape, inlet diameter, outlet diameter, and the density and viscosity of the working medium. Therefore, when selecting and using centrifugal pumps, it is necessary to consider these factors comprehensively, and determine the appropriate speed and head according to actual needs to ensure that the pump can work stably and efficiently.
In general, this proportional relationship between centrifugal pump head and speed provides an important reference for engineers and users to help them correctly select, install and use centrifugal pumps to meet different engineering needs.