or reduction gears if the pump fails because of
is pumped in the same manner as in the spur gear
excessive load or jamming of parts.
pump. However, in the herringbone pump, each
set of teeth begins its fluid discharge phase before
the previous set of teeth has completed its
Herringbone Gear Pump
discharge phase. This overlapping and the
relatively larger space at the center of the gears
The herringbone gear pump (fig. 4-3) is a
tend to minimize pulsations and give a steadier
modification of the spur gear pump. The liquid
flow than the spur gear pump.
Figure 4-3.—Herringbone gear pump.
4-4
