PUMPING SYSTEMS

Nowadays, in most of the industrial process it is necessary to make transferences of liquids from a level from static energy or pressure to another one. These process of transport in general happen from one lower level to another one in a higher point and in which it is necessary to overcome pressures. This is possible by the use of the pumping systems.

The hydraulic pumps transform the mechanical energy generated by the motor in hydraulic energy. This energy generated is added to potential and kinetic energy of the liquid to impel. Thanks to the friction force the transmission of the generated hydraulic energy to the liquid is possible.

The rotational movement that generates this transmission of energy is due to the part of the denominated pump bun, which is an impeller constituted by blades which they impel to the liquid towards the body of the pump becoming, at this moment, the kinetic energy in pressure energy which makes possible to direct the liquid towards the conduction of exit of the pump.

In order to determine the system of pumping adapted to each problem it is necessary to consider a series of variables. It is important to refer, when we speak about pumps, the existing difference between the different types from height.

When we speak of geometric height, we indicate the vertical range which exists between a free surface of liquid and an elevation. Opposite, if we speak of manometer or total height we are referring the sum of that geometric height and to the pressure drops that are not more than the forces which are against to the advance of the liquid through the pipes and other hydraulic elements due to the friction forces.

The characteristic Curves of the pumps relate the different characteristic values of a concrete model: speed of turn in RPM, yield and power loss as well as positive the net height of aspiration or NSPH. All these variables are function of the impelled Volume, Q.