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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