Centrifugal pump consists of what components? Why can it pump water?

Centrifugal pumps consist of impellers, pump housings, pump shafts, bearings and packing seals. The impeller is an important component that determines the performance of the pump.
The reason why a centrifugal pump can pump water is mainly due to the rotation of the impeller and the centrifugal force acting on the water. To understand this truth, we can use some examples from our daily life to explain. We all know that when any object rotates around a central axis, it generates centrifugal force. For example, if umbrellas are rotated in rainy weather, umbrellas will see rain splashing along the perimeter of the umbrella. The faster the rotation, the farther the rain will be thrown. This is because during the rotation of the umbrella, the raindrop on the umbrella surface will generate a force that throws outwards. The force that throws away from the center of rotation is called centrifugal force, and its size is related to the rotation speed.
The main working part of the centrifugal pump, the impeller, is equivalent to an umbrella. Before starting the pump, the suction pipe and the pump casing are filled with water and the air is eliminated. When the power machine drives the water pump impeller to rotate at a high speed, the water in the flow path of the blade, due to the effect of centrifugal force, is quickly thrown off the impeller from the middle of the impeller, and is ejected to the periphery, and flows through the volute pump casing to flow to the outlet pipe with pressure. The water is pumped high along the outlet pipe.
When the rotating impeller pushes the water out, the middle of the impeller forms a vacuum. Since the pump casing and the suction pipe are sealed, the pressure is lower than the outside atmospheric pressure. The pressure of the source water surface is 1 atmosphere pressure. We know that higher pressure water always flows to places with lower pressure. Therefore, the water of the water source is sucked into the pump through the suction pipe under the action of the atmospheric pressure. If the impeller is continuously rotated, the water pump will continuously pump water from the low point.

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