External Gear Pump:
•
Pair of gear meshing together in a close
chamber with an inlet port at one side and the out let port at other side.
•
One gear has extended shaft passing
through the casing in order to drive the pump.
•
Gear rotate in the give direction, fluid
drawn through inlet port where gear teeth are not meshing.
•
Trapped fluid between tooth and casing
is delivered at other side.
Internal Gear Pump:
Ø These
pumps consist of an inner and outer gear separated crescent type seal.
Ø The
two gears rotate in the same direction, with the inner gear rotate faster than
the outer.
Ø Fluid
is drawn into the pump where gear teeth begin to separate and is carried to the
outlet in the
space between the crescent and teeth of the both gears.
