gear metering pump working principle

sales01@cxflowmeter.com

Today, i will introduce the working principle of gear dosing metering pump to you.

The gear metering pump is driven by a pair of intermeshing gears, one of which is a driving gear and the other is a passive gear, which is driven

 by the driving gear to mesh and rotate. There is a small gap between the gear and the casing of the pump. When the gear rotates, in the 

suction chamber where the gear teeth gradually disengage, the closed volume between the teeth increases, forming a partial vacuum, and the

 liquid is sucked into the suction chamber under the action of the pressure difference. It is pushed forward by the gear between it and the 

casing, and sent to the liquid discharge chamber. In the liquid discharge chamber, the two gears are gradually meshed, the volume is reduced,

 and the liquid between the gears is squeezed to the liquid discharge port.

Because the machining accuracy of the gear metering pump is very high, whether it is the tooth surface accuracy of the gear, or the matching 

accuracy of the gear and the casing, the gear and the tooth top are very high, so the gear metering pump has a certain rotational displacement. 

In other words, every time the gear rotates, the volume of the liquid discharged is constant, so as the speed of the gear metering pump is 

adjusted, the gear metering pump can discharge a corresponding amount of liquid.

By measuring the rotational speed of the gear metering pump, the flow rate of the gear metering pump can be obtained.

advantage:

High precision: Under various temperature, viscosity and pressure conditions, it can ensure stable and repeatable flow, and the measurement

 accuracy is as high as 0.3%. No pulse output, good repeatability.

Issues to note:

For the alignment problem between the motor output shaft and the pump shaft, it is best to connect elastically and try to align it as much as 

possible. The strength of the bottom plate should be sufficient, and the bottom plate of the pump should not be too soft for a long time, 

which will cause the motor and the pump to be misaligned and damage the pump. The maximum allowable speed and the maximum speed 

of the field work. Be sure to let the fluid enter the inlet, try not to run dry and idling. Do not reverse the inlet and outlet of the pump. The pump

 will not discharge.

If you want to confirm what kind of gear metering pump is required for your working conditions, please contact winny: sales01@cxflowmeter.com