a centrifugal pump-how it works
A centrifugal pump works by converting kinetic energy into potential energy
measurable as static fluid pressure at the outlet of the pump. This action is
described by Bernoulli's principle.
With the mechanical action of an
electric motor or similar, the rotation of the pump impeller imparts kinetic
energy to the fluid through centrifugal force.
The fluid is drawn from the inlet piping into the
impeller intake eye and is accelerated outwards through the impeller vanes to
the volute and outlet piping.
As the fluid exits the impeller, if the
outlet piping is too high to allow flow, the fluid kinetic energy is converted
into static pressure. If the outlet piping is open at a lower level, the fluid
will be released at greater speed.
Multistage Centrifugal Pumps
A
centrifugal pump containing two or more impellers is called a multistage
centrifugal pump. The impellers may be mounted on the same shaft or on different
shafts.
If we need higher pressure at the outlet we can connect impellers
in series.
If we need a higher flow output we can connect impellers in
parallel.
All energy added to the fluid comes from the power of the
electric or other motor force driving the impeller.
Efficiency of large
pumps
Unless carefully designed, installed and monitored, pumps will be,
or will become inefficient, wasting a lot of energy. Pumps need to be regularly
tested to determine efficiency.
More related products of pumps
2012-04-12
