In a centrifugal pump, where does the liquid enter?

In a centrifugal pump, the liquid enters at the eye of the impeller. The eye of the impeller is the central portion where the liquid is drawn into the pump from the inlet. This area is designed to efficiently guide the incoming fluid into the impeller blades.

As the impeller spins, it imparts kinetic energy to the liquid, increasing its velocity and directing it outward towards the pump's casing and eventually toward the discharge port. This process is crucial for the operation of a centrifugal pump as it relies on this initial entry point for the effective movement of fluid.

The motor is responsible for driving the impeller but does not play a role in the entry of the liquid. The diffuser is used to convert kinetic energy into pressure energy after the liquid exits the impeller, and the discharge port is where the fluid exits the pump to go into the piping system; neither of these components is involved in where the liquid enters the pump.