齒輪脫開側的空間的體積從小變大，形成真空，将液體吸入，齒輪齧合側的空間的體積從大變小，而将液體擠入管路中去。吸入腔與排出腔是靠兩個齒輪的齧合線來隔開的。

齒輪泵的排出口的壓力完全取決于泵出處阻力的大小。

     要想獲得大流量就必須提高泵的轉速，對于一台泵的轉速，實際上是有限制的，這主要取決于工藝流體，如果傳送的是油類，圓弧齒輪泵則能以很高的速度轉動，但當流體是一種高粘度的聚合物熔體時，這種限制就會大幅度降低。

    2cy gear pump are mainly gear, shaft, pump body, pump cover, bearing and shaft end seal, etc.Gear with double circular arc tooth sine curve.It is the most prominent advantage compared with involute gear tooth profile in gear meshing process there is no relative sliding, so the tooth surface abrasion, stable running, without fluid phenomenon, low noise, long life and high efficiency.The pump out of the bondage of traditional design, making the circular arc gear pump in the design, production and use of entering a new field.Gear side space volume from small greaten, forming a vacuum, the liquid suction, the side of the gear mesh from large to small volume of the space, and the liquid into line.Suction chamber and discharge chamber are separated by two gears meshing line.Its structure is composed of a pair of meshing gears and the pump shell, the pump every turn a turn, the amount of discharge is the same.With continuous rotation of the drive shaft, the pump discharge fluid is constantly.Pump flow is directly related to the rotational speed of the pump.The gear pump outlet pressure depends on the size of the source resistance pump.Have to rise to get big flow pump rotation speed, for a pump rotation speed, is actually limited, which mainly depends on process flow, if transfer is oil, the circular arc gear pump can at high rotation speed, but when the fluid is a kind of high viscosity polymer melt, the restrictions could be greatly reduced.