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Vacuum Pump
Vacuum pump is a water ring type pump. The rotor casing of the pump which during operation is partly filled with water, accommodates the eccentrically mounted rotor. The rotation of the rotor forces the water to the periphery of the casing thus forming a rotating water ring. The inner surface of the water ring seals off the gas compartments which are formed between the rotor blades.
Due to eccentric rotation, the gas compartments increase in size as rotor rotates for part of the rotation and decrease in size for rest of the rotation. The action of these gas compartments formed between the blades of the rotor is thus, similar to that of many water pistons working together.
Vacuum pumps are extensively used for evacuation of air in pump casing and suction pipes (priming), siphons turbine chambers. These pumps can also be used for generation and maintaining vacuum in autoclaves, vacuum dryers or similar application in process industries.
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