pumps (mech)

7/31/2019 Pumps (Mech)

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WHAT ARE PUMPS??

Pump Is Defined As A device which transfers the input mechanical

energy of a motor or of an engine into pressureenergy or kinetic energy or both of a fluid

Or Simply

Its a device which converts the mechanical

energy into hydraulic energy of a fluid


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CLASSIFICATION.

BUCKET PUMPS

PLUNGER PUMPS

DIAPHRAGM PUMPS

RECIPROCATING PUMPS

GEAR PUMPS

LOBE PUMPS

SCREW PUMPS

CAM PUMPS

VANE PUMPS

ROTARY PUMPS

POSITIVE DISPLACEMENT PUMPS CENTRIFUGAL PUMPS

PUMPS


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RECIPROCATING PUMPS

These Pumps are

positive displacement

pump in which the

liquid is actuallysucked and then

displaced by a piston-

cylinder arrangement

which is driven to andfro by a crank and

connecting rod

mechanism.


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CLASSIFICATION OF RECIPROCATING PUMP.

1. According to the liquid being incontact with Piston-

a. Single acting pump in which the liquidremains in contact only with one side ofthe piston .

b. Double acting pump in which liquid

remains in contact with both sides of thepiston.


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2. According to number of cylindersin a Pump-

a. Single Cylinder Pump.

b. Multicylinder pumps in which the pumpthe pump has two or more cylinders.


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COMPONENTSOFRECIPROCATINGPUMPS-


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COMPONENTS-

1. Crank / Connecting Rod Mechanism-

Crank is mounted on crankshaft which is driven by either I.C Engine OrElectric Motor.

2. Piston And Cylinder-

The Piston reciprocates inside cylinder. The reciprocating motion of

piston is obtained by connecting rod which transfers rotary motion of

crank.


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3. Suction Pipe-

It is the pipe which is connected to the suction of the

pump. Through this pipe, the liquid will be sucked from

sump.

Provided with a Non-return valve called Suction Valve.

4. Delivery Pipe-

Connected to discharge end. It carries liquid at high

pressure at some height.

5. Sump-Its reservoir of liquid through which water is pumped.


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1. SINGLE ACTINGRECIPROCATING PUMP


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Single Acting Pump gives intermittent

discharge. This Is Because of the NonContinuous Delivery Stroke.


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2. DOUBLE ACTINGRECIPROCATINGPUMP

In A Double Acting Reciprocating Pump, bothsuction and delivery strokes simultaneously.

1. When the crank rotates from I.D.C in clockwise

direction, a vacuum is created on left hand side

of piston and the liquid is sucked from the sumpthrough first suction valve . At Same time, the

liquid on the right hand side of the piston is

compressed and high pressure liquid causes the

opening of second delivery valve so that liquid ispassed on discharge tank. This continues till the

crank reaches O.D.C.


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2. With the further rotation of the crank,

the piston now moves towards I.D.C.

At this time water will be suckedthrough valve 2 since vacuum will be

created on right hand side of piston. At

the same time, the liquid on left hand

side of piston will be compressed

which forces delivery valve 1 to open

so that liquid will rise through that

delivery pipe. This operation continues

till the crank reaches I.D.C , when

piston is at extreme left position.Thus In this cycle the discharge

obtained is continuous.


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APPLICATIONS1. Pumping of water in buildings.


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1. Hydraulic control systems.

2. In petroleum installations to pump oil.

3. To pump water from source to fields fro

agricultural and irrigation purposes.

4. In steam and diesel power plants to

circulate feed water and cooling water

respectively.

5. Fire fighting6. Transfer of raw materials.


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THANKS

FORLISTENIN

Prepared By-117- Mohsin Ansari

pumps (mech)

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