summary
The pump body and pump cover of the coal tar residue oil gear pump are made of gray cast iron or cast steel parts. The gear, shaft, and bearing sleeve are made of low-carbon alloy steel that has undergone three heat treatment processes, and its surface hardness can reach HRC60 or above. The pump is equipped with an adjustable gear end face clearance structure. When the working pressure of the pump decreases during operation, the external fine adjustment structure on the pump cover can be used to adjust the gear end face clearance inside the pump, so as to adjust the working pressure of the pump several times. And multiple hydraulic balance technologies are adopted to ensure high efficiency, low noise, smooth and stable operation, and long pressure holding time of the pump under high pressure. It can be used for conveying and pressurizing residual oil, coal tar, landing oil, foam raw materials and edible oil containing additives below 200 ℃ and with viscosity no more than 1500cst.
operational principle
The basic form of a coal tar residue oil gear pump is that two gears of the same size mesh and rotate with each other in a tightly fitted housing. The interior of this housing is similar to an "8" shape, with two gears installed inside, and the outer diameter and sides of the gears are tightly fitted with the housing. The material from the extruder enters the middle of two gears at the suction port and fills this space. It moves along the shell with the rotation of the teeth and is finally discharged when the two teeth mesh. There are well-designed oil discharge and return grooves inside the pump, which minimize the torque force borne by the gears during operation. Therefore, the bearing load is small, wear is small, and the pump efficiency is high. The service life of the pump can be increased by 10-20 times compared to general gear pumps.
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