In external gear pumps, two identical gears rotate against each other. The motor provides
the drive for one gear. This gear in turn drives the other gear. A separate shaft supports
each gear, which contains bearings on both of its sides (Figure 1.8).
As the gears come out of the mesh, they create expanding volume on the inlet side of
the pump. Liquid flows into the cavity and is trapped by the gear teeth while they rotate.
Liquid travels around the interior ...
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