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Centrifugal pump works and classification
Centrifugal pump works Centrifugal pump relies on the role of the impeller on the liquid to the prime mover mechanical energy transfer to the liquid. Due to the role of the liquid from the impeller inlet to the outlet of the process, the speed and pressure can be increased, the impeller is discharged liquid through the pressure chamber, most of the speed can be converted into pressure energy, and then sent along the discharge line, which , The inlet of the impeller is evacuated by the liquid to form a vacuum or a low pressure. The liquid in the sump liquid pool is pressed into the inlet of the impeller under the effect of the liquid surface pressure (atmospheric pressure), so that the rotating impeller continuously Inhale and expel liquid. 2, the working principle of the positive displacement pump (rotary type) Power is transmitted to the gear through the shaft. A pair of synchronous gears drives the pump blades to rotate synchronously and reversely to make the inlet area produce a true mouth and absorb the medium. When the pump leaves rotate, Media sent to the exit, continue to rotate, the smaller the volume of the exit cavity, resulting in pressure (exit high pressure zone) the media output. Due to the low volume pump positive displacement, self-priming capacity, poor flowability of high-viscosity media, full of time and speed full of holes, so this type of pump for high viscosity media. Pump internal sealing surface. Internal diarrhea is small, so the pump efficiency is higher, up to 70%, while high-pressure transmission medium can be reached, and the viscosity of the medium also has good adaptability. 3, the classification of centrifugal pumps and their characteristics Centrifugal pumps according to their structure is divided into: vertical pumps and horizontal pumps, vertical pumps are characterized by: small footprint, small construction investment, easy installation, the disadvantage is: the center of gravity High, not suitable for fixed foot running occasions. Horizontal pump Features: Wide range of applications, low center of gravity, good stability, the disadvantages are: large area, the building into a large, bulky, heavy weight.