Metering pump manufacturer, in the work of gear pump, the driving wheel rotates with the motor, and the driving driven wheel also rotates with it. With the gradual separation of the meshing teeth on one side of the suction chamber, the volume of the suction chamber increases and the pressure decreases, the liquid in the pipeline in the suction chamber is sucked into the pump, and the suction liquid is divided into two paths and pushed into the exhaust chamber through the alveolar. When the liquid enters the discharge chamber, the teeth of the two gears mesh continuously.

Metering pump dealers, liquid will be squeezed out of the discharge chamber into the discharge pipe. The driving wheel and driven wheel rotate continuously, and the pump can continuously pump and discharge liquid. Gear external gear pump is a kind of gear pump which is widely used. Its structure is shown in Figure 1, mainly composed of driving wheel, driven wheel, pump body, pump cover, safety valve, etc.

The sealing space composed of pump body, pump cover and gear is the working space of gear pump. The driving gear shaft extends out of the pump body and is driven to rotate by the motor. The external gear pump has the advantages of simple structure, light weight, low cost and reliable operation, which is suitable for various occasions. If the delivery is oil, the pump can rotate at high speed, but when the fluid is high viscosity polymer melt.

This limit will be greatly increased. It is very important to push the high viscous liquid into the two tooth space at the suction port. If this space is not filled, the pump will not be able to discharge the flow, so PV (pressure × Velocity is also a limiting factor, and it is a process variable. In view of the above limitations, gear pump manufacturers will provide a range of products with different specifications and displacement (displacement per revolution).

The pump will be combined with specific application process to achieve good system performance and price. The gear pump driven by independent motor can effectively block the pressure fluctuation and upstream flow fluctuation. The output pressure pulsation of gear pump can be controlled within 1%. A gear pump is used in the extrusion line, which can improve the flow output speed and reduce the shearing and residence time of materials in the extruder.