Gear pumps are also referred to in the jargon as positive displacement devices, ie pistons in a cylinder, which are squeezed out mechanically as one tooth enters the fluid space of the other tooth, since the fluid is incompressible , So the liquid and the tooth can not occupy the same space at the same time, so that the liquid is excluded.As the teeth continue to engage, this phenomenon occurs continuously, thus also providing a continuous discharge at the pump outlet, The pump discharges the same amount of revolution per revolution, and as the drive shaft rotates uninterruptedly, the pump discharges fluid without interruption. The flow of the pump is directly related to the speed of the pump. In fact, there is a small amount of fluid loss in the pump, which makes the gear pump can not run 100% efficiency, because these fluids are used to lubricate both sides of the bearing and gear, and the pump body will never go without clearance, Therefore, it is inevitable that a small amount of fluid is lost, but the pump can operate well and still achieve 93% to 98% efficiency for most of the extruded material. The concept of gear pump is very simple, that is, its most basic form is the same size of two gears in a close-fitting shell with each other engaged rotation, the shell is similar to the internal "8" shape, two gears inside , The outer diameter of the gear and the two sides of the shell with a close fit.Extruder material in the suction port into the middle of two gears, and full of this space, along with tooth rotation along the housing movement, and finally in the two teeth Emitted when engaged.
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