Centrifugal Pump Overview

By essence, centrifugal pumps are pumps that are rotodynamic in nature. This pump makes use of a rotating impeller that helps increase the velocity of the liquid. Although the centrifugal pump is used for various purposes, they find common application where a liquid needs to be moved through a piping system.

The entry point for the liquid into the pump impeller is either along or somewhere near the rotating axis. Once the liquid enters, the impeller further accelerates it. This leads to the fluid flowing in the outward direction radically into a diffuser or a volute chamber. After the fluid enters the diffuser it makes an exit into the downstream piping system. Thus, these pumps prove to be of great help in making larger discharges via smaller head.

The centrifugal pump has an interesting history behind it. As per Reti, who was a Brazilian historian of science, a water or mud-lifting machine that was reminiscent of the centrifugal came about in 1475. This prototype of the centrifugal came as a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini. However, it was in 1600 that Denis Papin came out with the first true centrifugal pumps. But Papin's version of the centrifugal had straight ones instead of curved. The curved vane came into being in 1851 and was introduced by the British inventor John Appold.

The working of the centrifugal pumps is simple. These pumps operate on rotational kinetic energy that comes from an electric motor or a turbine. This rotational kinetic energy is converted into an increased static fluid pressure. The Bernoulli's principle describes this action.as a result of the rotation of the pump, the liquid gains kinetic energy as it is drawn inwards from the impeller eye i.e. the center and is then pushed out into the periphery via the impeller vanes.

Now once the liquid exits the impeller, the velocity of the liquid is converted into pressure i.e. static. This happened because of the change in area the fluid experiences in the volute section. Amidst various other factors it is the volute shape of the pump casing or the diffuser vanes that are mainly responsible for this conversion. The purpose of the diffuse, here is to slow down the liquid and translate the kinetic energy in to flow work. As a result of the conversion of energy, the pressure on the downstream side of the pump increases, which in turn causes flow.

There are various sources that you can seek help of to know more about the centrifugal pump. However, the Internet would be the best option. Surf the web and you shall get all the information that you need about their maintenance, power, prices, operation, manufacturers and the like.

Click on the following link to learn more about centrifugal pumps.