What is the meaning of the design of the gear pump? Gear Pump Manufacturers analysis:
The gear pump uses a toothed gear to rotate within a tight tolerance housing to draw in liquid and then extrude them. The paddle steamer uses the same principle of operation. These pumps are positive displacement pumps and any pump that is drawn in will be squeezed out. As a result, they can generate very high discharge pressures. Structural materials range from various types of metals and hardness to plastics of various types and hardnesses.
Maintaining tight tolerances between the housing and the gear is critical to efficient operation. The gap between the edge of the tooth and the housing and the gap between the end of the gear and the rear and front walls of the housing are very small. Between the teeth and the housing, it is approximately 0.1 mm (0.004"), and the gap between the front and rear surfaces of the gear and the end of the housing is only 0.025 mm (0.001"). The fine clearance reduces the recirculation of liquid from the high pressure back to the low pressure suction side, making these pumps one of the effective pumps.
Gear pumps typically have a shaft bore through the housing for connection to the drive. The gear shaft on the smaller pump can be supported in a journal bearing in the end of the housing and lubricated by the product. Use a rolling bearing mounted in the housing on a larger pump. In order to prevent contact between the surface and the surface, the product is lubricated.