GENERAL DESCRIPTION
Work principle
When active gear 4 rotates with clockwise direction, driven gear 10 rotates with anti-clockwise direction,
partial vaccum is formed when teeth of two gears are away from the area in oil in side (left area shown in the
figure), with effect of atmospheric pressure, hydraulic oil enters oil suction chamber of oil pump and fills in
teeth area. At the other oil outlet side, the size is smaller because of gear mesh, hydraulic oil is squeezed out,
gear keeps rotating, gear teeth keeps squeezing out hydraulic oil to enter into work oilway and realize
constant oil supplying of the system.
Figure 1
Main Pump SPC000012
Page 3
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