I would like to ask whether the head of a centrifugal pump changes during its operation
Thread Content
During operation of a centrifugal pump, does the head provided by the pump itself change (assuming the motor is a constant-speed motor)? If it does change, how does it change?
It exhibits a corresponding head depending on whether external conditions change; the specific value needs to be checked from the curve!
If the flow rate changes, the head will also change. The head of a centrifugal pump decreases as the flow rate increases.
A centrifugal pump operates only on a curve; when the head changes, it is certain that the flow rate of the system has changed. Of course, if the viscosity of your material changes, the head pressure will also change, with the trend being that head pressure is inversely proportional to viscosity. Similarly, as the specific gravity changes, the head also changes, following the same trend.
During operation of the pump, as the flow rate changes, the head also changes accordingly
It will change. It can be seen from the pump’s performance curve that, near the pump’s operating point, as the flow rate increases, the head decreases.
Generally, in ordinary centrifugal pumps, the head gradually decreases as the inlet flow rate increases. The lower the specific speed, the faster the head drops!
Generally, in ordinary centrifugal pumps, the head gradually decreases as the inlet flow rate increases. The lower the specific speed, the faster the head drops!