Seeking help regarding the principle of metering pumps
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I need help understanding the principle of metering pumps. Thank you
Working principle: The motor drives the worm through a coupling, and the worm gear reduces the speed, causing the main shaft and the eccentric wheel to rotate. The eccentric wheel then drives the sliding adjustment seat of the arc-shaped linkage to move back and forth. As the plunger moves toward the rear dead center, a vacuum gradually forms within the pump chamber; the suction valve opens, allowing liquid to be drawn in ； As the plunger moves toward the forward dead center, the intake valve closes while the discharge valve opens, and the liquid is discharged as the plunger moves further. The reciprocating motion of the pump enables continuous, pressurized, and measured discharge of liquid.
A metering pump is generally a plunger pump, and the flow rate can be determined based on the rotation speed and stroke length. Flow regulation is achieved by adjusting the stroke of the plug.