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- Understanding the Classification of Pumps: Rotadynamic, Positive Displacement, and More
Understanding the Classification of Pumps: Rotadynamic, Positive Displacement, and More
Learn about the classification of pumps including rotadynamic, positive displacement, and other categories. Find out how pumps work to transfer liquids and increase pressure. Subscribe for more educational videos!
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Video Transcript
Hi, Professor Vishal Teller, welcome to my YouTube channel.
In this video, I teach you classification of pump.
So pump is generally classified in three categories, that is a rotadynamic pump, positive displacement
pump and another category.
So first we move towards the rotadynamic pump.
First I explain what is a pump.
Pump is a device which is used to transfer a liquid from low head to high head or it
is also used to increase the pressure of a liquid.
So here before that I request to subscribe my channel for watching more videos on different
subjects and also press the bell icon to get the continuous updates.
Now the first classification of the pump is the Rotadynamic.
What is the meaning of Rotadynamic?
here we divide this word rotadynamic in two parts
means rota plus dynamic
Rotor what means it is used for the rotor that is a rotating component or a rotating
shaft.
And what is the meaning of dynamic?
Dynamic means the substance or a liquid have a high velocity it's known as the dynamic.
Okay, so pump is generally used for increase the pressures.
So in a rotodynamic type pump what happened?
We first increase the dynamic energy of the liquid.
Dynamic energy means we increase the velocity of the liquid first then after
this velocity of the liquid is further converted into pressure energy in some
another device. Okay then it is known as the Rotor Dynamic Pump. So here I write
that this pump is operate on the principle of the rise in pressure energy
of the liquid by dynamic action means by increasing its velocity and this
velocity of the liquid is increased in an impeller means by using this impeller
we are increasing the velocity of the liquid and this velocity of the liquid
then further supply in the casing. In the casing, velocity energy is converted into
the pressure energy. In a rotodynamic pump, there are two types of pumps. One is the
centrifugal pump and another is the propeller type pump. So, we all know that
centrifugal force. So, due to action of centrifugal force, we increase the
velocity of a liquid then this pump is known as the centrifugal pump.
This is the image of the centrifugal pump.
So these are the Rotodynamic classifications.
Now second is the positive displacement pump.
Before that I request to like the video if you learn some things and for watching more
video go to the playlist and also on the description various link is available.
Now second classification is positive displacement type pump.
What is the meaning of positive displacement?
positive displacement pump operate on the principle of the finite quantity of the liquid
is discharged, discharged means the finite quantity of liquid is discharged from the
pump or supplied from the pump due to the positive or real displacement of the working
elements, displacement or a moment.
So, every component has some elements like piston, plunger, gear, vans and screw.
So, these components are displaced or a move.
This motion is known as the real displacement and due to this real displacement of the piston
or the plunger or a gear or a van or a screw, pressure of the liquid is directly increased
then it is known as the positive displacement pump.
In positive displacement pump we are not required to increase the velocity and further conversion.
