【Daily Question: Pump Equipment】Short Answer Question, 3/26/2019
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Answer: The pump body consists of a suction chamber, a liquid storage chamber, a volute chamber, a liquid return port, and a gas-liquid separation chamber. Once the pump starts operating properly, the impeller draws in both the liquid stored in the suction chamber and the air present in the suction pipeline; these substances mix thoroughly within the impeller. Under the effect of centrifugal force, the liquid carrying the gas flows toward the outer edge of the volute, where it forms a white foam layer of certain thickness as well as a high-speed rotating liquid ring. The gas-liquid mixture enters the gas-liquid separation chamber through a diffusion tube. At this point, due to the sudden decrease in flow rate, the lighter gases are separated from the mixture of gas and liquid, and they continue to rise and be discharged through the pump’s outlet. The degassed liquid returns to the liquid storage chamber and enters the impeller again through the return hole, where it mixes once more with the gas drawn in from the suction line. Under the action of the high-speed rotating impeller, the liquid moves toward the outer edge of the impeller... As this process repeats continuously, the amount of air in the suction line gradually decreases until no gas remains, completing the self-priming process and allowing the pump to operate normally.
A horizontal pump achieves suction, compression, and discharge by changing the volume of its pump chamber; therefore, it is a variable-volume centrifugal pump. Horizontal pumps can be used in many industrial sectors such as petroleum, chemicals, machinery, mining, light industry, pharmaceuticals, and food processing. Horizontal pumps are widely used in many industrial processing procedures, such as vacuum filtration, vacuum water pumping, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum rehumidification, and vacuum degassing. It can remove flammable and explosive gases, as well as gases containing dust and moisture; therefore, water ring pumps are being used more and more often.
The pump body consists of a suction chamber, a liquid storage chamber, a volute chamber, a liquid return port, a gas-liquid separation chamber, etc. Once the pump starts operating properly, the impeller draws in both the liquid stored in the suction chamber and the air present in the suction pipeline; these substances mix thoroughly inside the impeller. Under the effect of centrifugal force, the liquid carries the gas with it as it flows toward the outer edge of the volute, resulting in the formation of a white foam layer of certain thickness as well as a high-speed rotating liquid ring at the outer edge of the impeller. The gas-liquid mixture enters the gas-liquid separation chamber through a diffusion tube. At this point, due to the sudden decrease in flow rate, the lighter gases are separated from the gas-liquid mixture, and the gases continue to rise and be discharged through the pump’s outlet. The degassed liquid returns to the liquid storage chamber, and then enters the impeller through the return hole, where it mixes again with the gas drawn in from the suction pipeline inside the impeller. Under the action of the high-speed rotating impeller, it flows toward the outer edge of the impeller... As this process repeats over and over, the air in the suction line gradually decreases until all the gas is drawn in, completing the self-priming process; at that point, the pump begins to operate normally
This rectangular box is generally referred to as a chamber, and it serves the purpose of storing the medium. Before the pump is started for the first time, it must be filled with water inside this box; otherwise, the fluid cannot be drawn in. Once the motor is turned on, the impeller rotates at high speed, causing the water in the impeller’s channels to flow toward the volute. This creates a vacuum at the inlet, which opens the inlet check valve and allows air from the suction pipe to enter the pump. This air then moves through the impeller’s channels to the outer edge of the pump, from where the fluid is discharged through the outlet. Thus, a self-priming phenomenon is formed.
Water storage: Before starting a self-priming centrifugal pump, it is essential to fill the pump casing with water before starting; otherwise, this will cause the pump to overheat, vibrate, and have a reduced flow rate. It can also lead to damage to the pump (a condition known as \"cavitation\”), resulting in equipment failures!
The square box is filled with the medium; there is no need to pump it in separately before starting