Dosage pump, also known as metering pump or dosing pump, is a special volumetric pump that is widely used to meet various stringent process requirements. Its working principle is based on the motor driving the worm and worm gear to reduce the speed, so that the main shaft and eccentric wheel make a rotary motion, and then drive the bow-shaped connecting rod to reciprocate in the sliding adjustment seat. Specifically:
Motor drive: The motor drives the worm through the coupling, and the main shaft and eccentric wheel make a rotary motion after the worm gear reduces the speed. The eccentric wheel drives the bow-shaped connecting rod to reciprocate in the sliding adjustment seat.
Pump chamber change: When the plunger (or diaphragm) moves to the rear dead point, a vacuum is gradually formed in the pump chamber, the suction valve opens, and the liquid is sucked in; when the plunger (or diaphragm) moves to the front dead point, the suction valve closes, the discharge valve opens, and the liquid is discharged under the push of the plunger (or diaphragm).
Flow regulation: By rotating the adjustment handwheel, the movement stroke of the plunger (or piston) in the pump chamber can be changed, so as to accurately control the flow rate. This precise flow regulation method makes metering pumps play a vital role in industrial production.