HOW DOES RECIPROCATING PUMP WORKS
In this article we will discuss about working of
reciprocating pump so let’s start it.
When the crank starts rotating, the piston moves to and
fro in cylinder. When crank is at, the piston is at the extreme left position
in the cylinder. As the crank is rotating from A to C (i.e., from 00 to 1800 ) the piston is
moving towards right in the cylinder. The movement of the piston towards right
create partial vacuum in the cylinder. But on the surface of the liquid in the
sump, atmospheric pressure is acting, which is more than the pressure inside
the cylinder. Thus the liquid is forced in the suction pipe from sump. The
pressure of the liquid opens the suction valve and enters the cylinder.
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| sketch of a reciprocating pump |
When the
crank is rotating from C to A (1800 to 3600 ) the piston its
extreme right position starts moving towards left in the cylinder. The movement
of piston towards left increases the pressure of the liquid inside the cylinder
more than the atmospheric pressure. Hence suction valve closes and raised to
the required height.
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