types of pumpspumps

7/28/2019 Types of pumpsPumps

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PUMP

A pump is a device that moves fluids(liquids orgases), or sometimes slurries, by

mechanical action.
http://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Slurryhttp://en.wikipedia.org/wiki/Slurryhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Liquid


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CLASSIFICATION

Depending on the functions of the pumps, and the

method they use, they are classified into 3 main

categories:

Direct l i f t Pumps

Displacement Pumps

Gravi ty Pumps


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DISPLACEMENT PUMPS

Displacement pumps are the pumps that displace acertain volume fluid (mostly water) per certain amount

of time.

Depending on the volume of water displaced and the

method used to displace it, these can be further

classified as :

Positive Displacement Pumps

Non Positive Displacement Pumps


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POSITIVE DISPLACEMENT PUMPS

A positive displacement pump makes a fluid move by

trapping a fixed amount and forcing (displacing) that

trapped volume into the discharge pipe.

Depending on how the displacement takes place,

Recipro cat ing and Centr i fugalpumps are how the

positive displacement pumps are classified into.


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CENTRIFUGAL PUMP

Centrifugal pumps, are a sub-class of dynamic axisymmetric

work-absorbing turbo machinery. Centrifugal pumps are used

to transport liquids/fluids by the conversion of the rotational

kinetic energy to the hydro dynamics energy of the liquid flow.
http://en.wikipedia.org/wiki/Turbomachineryhttp://en.wikipedia.org/wiki/Turbomachinery


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PRINCIPLE

Like most pumps, a centrifugal pump converts

mechanical energy from a motor to energy of a

moving fluid. A portion of the energy goes into

kinetic energy of the fluid motion, and some intopotential energy, represented by fluid pressure

(Hydraulic head) or by lifting the fluid, against

gravity, to a higher altitude.
http://en.wikipedia.org/wiki/Hydraulic_headhttp://en.wikipedia.org/wiki/Hydraulic_head


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Common uses include water, sewage, petroleum

and petrochemical pumping. The reverse functionof the centrifugal pump is a water turbine converting

potential energy of water pressure into mechanical

rotational energy.
http://en.wikipedia.org/wiki/Water_turbinehttp://en.wikipedia.org/wiki/Water_turbine


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WORKING

The rotational energy typically comes from an engine or electric motor or

turbine. In the typical simple case, the fluid enters the pump impeller along or

near to the rotating axis and is accelerated by the impeller, flowing radially

outward into a diffuser orvolute chamber (casing), from where it exits.

The transfer of energy from the mechanical rotation of the impeller to the motionand pressure of the fluid is usually described in terms ofcentrifugal force,

especially in older sources written before the modern concept ofcentrifugal

force as a fictitious force in a rotating reference frame was well articulated.

The outlet pressure is a reflection of the pressure that applies

the centripetal force that curves the path of the water to move circularly

inside the pump.
http://en.wikipedia.org/wiki/Volute_(pump)http://en.wikipedia.org/wiki/Casinghttp://en.wikipedia.org/wiki/Centrifugal_forcehttp://en.wikipedia.org/wiki/Centrifugal_force_(rotating_reference_frame)http://en.wikipedia.org/wiki/Centrifugal_force_(rotating_reference_frame)http://en.wikipedia.org/wiki/Centripetal_forcehttp://en.wikipedia.org/wiki/Centripetal_forcehttp://en.wikipedia.org/wiki/Centrifugal_force_(rotating_reference_frame)http://en.wikipedia.org/wiki/Centrifugal_force_(rotating_reference_frame)http://en.wikipedia.org/wiki/Centrifugal_forcehttp://en.wikipedia.org/wiki/Casinghttp://en.wikipedia.org/wiki/Volute_(pump)


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ROOTS TYPE PUMP

This is a multi lobed centrifugal

pump which works on a very

simple principle.

The fluid at lower pressure

comes into the pump from the

top opening. Due tosynchronization of the 2 lobes,

the fluid trapped in the space

within the lobes.

When the fluid is released from

the bottom end, it is

pressurized and has a high

discharge.


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The outer casing of the pump

is made of iron. It is heavy.

Priming is required to operate

this pump.

Priming is the process ofevacuating trapped air from

within the pump, as, if that is

not done, damage may occur

and the efficiency of the pump

may drop.


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USEAND USABILITY

Such pumps are used on a domestic basis. This

includes the use at home, in garages, in fields, etc.

High speed washing, water drawing, etc are its

common uses.

The prices of such pumps start as low as Rs 2500 but

soar upto well over Rs 50000/- depending on the

specs.

There is a lot of scope of development in this field andthis is an attempt to make these pumps as less

expensive as possible and check the feasibility of

marketing the product as well.


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Our prototype is about to pass the design stage

wherein we will be using substitute materials instead

of real metals.

This is done to lighten the project and make it portable

but yet to check its workability at the same time.

Proposed material for the Impellor is wood and that for

the casing is 5mm mild steel plates.

Driver will be a high speed high torque electric motor.

Manufacturing is yet to commence.


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THANK YOU

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