What is the working principle of centrifugal pump?

Working principle of centrifugal pump: As shown in the following figure 1, when the pump is not working, the pump shell and suction pipe must be filled with water. At this time, the water around the impeller is still. When the pump motor drives the impeller to rotate at high speed, the water obtains great centrifugal force. When it reaches below the water outlet of the water pump, it will produce centrifugal phenomenon and rush out of the nozzle. Because the pump shell is made into a spiral shape, when the water rises along the spiral, its cross-section gradually increases from small to large, and the water flow speed decreases and slows down with the increase of the cross-section

According to the law of conservation of physical energy, kinetic energy is converted into pressure energy, which increases gradually. When it reaches the outlet of the pump, the pressure energy of water is the largest, and this pressure energy is the driving force of water delivery. At the same time, the water in the center of the impeller is thrown outside by centrifugal force, forming a vacuum state, so the water in the pool enters the pump casing through the suction pipe under the action of atmospheric pressure. The continuous operation of the pump can ensure continuous water supply.

Centrifugal pump is a kind of centrifugal water pump, which works by centrifugal movement of water caused by impeller rotation. Before starting the pump, the pump shell and suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and water to rotate at high speed, and the water is centrifugally moved, thrown to the outer edge of the impeller, and flows into the water pressure pipe of the pump through the flow channel of the volute pump shell. The basic structure of centrifugal pump consists of six parts, namely: impeller, pump body, pump shaft, bearing, sealing ring and stuffing box.