Working principle, advantages and precautions of gear metering pump

 sales01@cxflowmeter.com

Today, CIXIFM Winny will introduce the working principle of gear 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 know more about the parameters and quotation of dosing metering pump, please contact winny: sales01@cxflowmeter.com