Advantages and disadvantages of gear pumps

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two enclosed spaces are composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side of the gear disengagement increases from small to form a vacuum to suck in liquid, and the volume of the space on the gear mesh side increases from large Small, and squeeze the liquid into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the outlet of the pump.

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two enclosed spaces are composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side of the gear disengagement increases from small to form a vacuum to suck in liquid, and the volume of the space on the gear mesh side increases from large Small, and squeeze the liquid into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the outlet of the pump.

●The advantages of the external gear pump are:The utility model has the advantages of simple structure, light weight, small size, easy manufacture, low cost, reliable work, convenient maintenance, strong self-priming ability, and is not sensitive to oil pollution, and can be widely applied to occasions with low pressure requirements (grinding machines, grinding machines, etc.) Medium and low machine tools).

●Disadvantages:The internal leakage oil is large, the bearing is subjected to unbalanced forces, the wear is severe, the pressure pulsation and noise are large.

●The advantages of the internal gear pump are:The utility model has the advantages of compact structure, small size, light weight, small relative sliding, small wear and long service life, and the flow pulsation and noise are much smaller than that of the external gear pump.

●Disadvantages: complex tooth shape, high processing precision and high cost.