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PUMPSM.S.STEVEAssistant ProfessorDept. of Mechanical EngineeringAmal Jyothi College of Engineering, Kanjirapally.

Email: (mssteve@amaljyothi.ac.in)Phone: +91 9745917858

A pump is a machine which converts mechanical energy to fluid energy, the fluid being incompressible. This action is opposite to that in hydraulic turbines.Based upon the working principle pumpa can be classified asPUMPS

Amal Jyothi College of Engineering, Kanjirapally

Centrifugal pump

Amal Jyothi College of Engineering, Kanjirapally

Centrifugal Pump

Amal Jyothi College of Engineering, Kanjirapally

Working Of Centrifugal PumpBasically consist of three main stagesPriming- filling the suction pipe and the entire casing with water to develop required suction headDeveloping required suction head by the centrifugal force produced by impellerProducing required discharge headBy increasing kinetic energy of water with impellerConverting kinetic energy to pressure energy with the help of involute casing

Amal Jyothi College of Engineering, Kanjirapally

Centrifugal Pump..a short lookInitial process to be done is priming of pump. The presence of foot valve(non return valve) helps to retain the water in pump when it is stoppedIn pumps, the movement of blade system(impeller) moves the fluid, which is always in contact with blade thereby converting mechanical energy of blade system to kinetic energy So the centrifugal head imparted to the fluid by its rotation enables the liquid to reach at higher levelThe increase in cross sectional area of casing towards the delivery pipe helps to convert the kinetic energy of water to required pressure energy For perfect conversion, the moving blade should be in contact with the fluid at all places. In other words, the moving blade system should be completely immersed in fluid.

Amal Jyothi College of Engineering, Kanjirapally

Positive Displacement pumpIn positive displacement pumps, fluid is pushed whenever pump runs. The principle of action is the actual displacement or pushing of liquid by piston plunger etc. These pumps are also called as static pumps. The pumps, operated under this principle, are reciprocating, screw, ram, plunger, gear etc.The volume of liquid delivered is constant regardless of the pressure and is varied only with the variation in the speed of the running motor

Amal Jyothi College of Engineering, Kanjirapally

Lobe pump

Rotary Gear pumpPositive Displacement pumps

Reciprocating pump

Amal Jyothi College of Engineering, Kanjirapally

Reciprocating PumpComponentsSuction and delivery pipe with unidirectional valves,Cylinder piston arrangement,Connecting rod and crank mechanismWorkingSuction stroke-backward movement of piston creates vacuum inside cylinder causing the water to come inDischarge stroke- forward movement of piston pushes the water to discharge pipe

Amal Jyothi College of Engineering, Kanjirapally

Reciprocating Pumps

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