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External gear pump
Views: 34 Update Date: Jun 11 , 2019

External gear pump is a gear pump composed of external gears. It is mainly composed of driving gear, driven gear, pump body, pump cover and safety valve. The sealing space composed of pump body, pump cover and gear is the working room of gear pump. The axles of the two gears are respectively installed in the bearing holes of the two pump caps. The driving gear axle extends out of the pump body and is driven by the motor to rotate. The external gear pump has the advantages of simple structure, light weight, low cost, reliable operation and wide application range.

External gear pump is a rotary pump which relies on the change and movement of working volume between pump cylinder and meshing gear to transport liquid or pressurize it. Two closed spaces are composed of two gears, pump body and front and rear covers. When the gear rotates, the volume of the space on the detaching side of the gear increases from small to large, forming a vacuum, sucking the liquid in, the volume of the space on the meshing side of the gear decreases from large to small, and squeezing the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing lines of two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the outlet of the pump.

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