Self-sealing gear pump

Abstract

The invention relates to a self-sealing gear pump. The self-sealing gear pump is characterized in that a suction inlet of an internal thread and a discharge port of the internal thread are positioned on two sides of a pump body, the two end faces of the pump body are perpendicular to a dual-semicircle hole, a front outer end cover and a rear outer end cover cover the two end faces respectively, and the front and rear outer end covers and the two end faces are fastened by end cover screws; a main alloy gear is meshed with a slave alloy gear, the pump body is provided with an internal pressure channel, one end of the internal pressure channel is communicated with a cavity on the back of a compensating disc, and the other end of the internal pressure channel is communicated with a discharge port of the internal thread; composite material compensation discs are arranged between the main alloy gear and the front outer end cover as well between the slave alloy gear and the front outer end cover; and composite material friction discs are arranged between the main alloy gear and the rear outer end cover as well as between the slave alloy gear and the rear outer end cover; and both the composite material compensation discs and the composite material friction discs are made of a composite material formed by Fe / Al intermetallic compound and Al2O3 ceramic, and both the main alloy gear and the slave alloy gear are made of Nb (niobium) micro-alloying high strength powder metallurgy material.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and the international patent classification is F04D non-variable pump, which relates to an energy conversion rotary positive displacement pump which converts mechanical energy into liquid pressure energy, in particular to a self-sealing gear pump. Background technique [0002] Rotary positive displacement pumps have the advantage of high efficiency, but their efficiency is significantly reduced after long-term wear and tear. The main reason for the above defects is that the end face movable isolation between the high pressure chamber and the low pressure chamber cannot play an effective sealing role. In engineering, it is difficult to find a material that can meet all the conditions of a specific working condition and have good cost performance. Therefore, in the past, people often used various surface coating methods to solve this problem; that is, to make full use of two or more materials ...

AI Technical Summary

Problems solved by technology

If the material is too hard, it is easy to break, if it is too soft, it will not be able to process a high-precision surface. If the tolerance of the end face is too small, it will easily be stuck due to thermal expansion. Had to stop the production line to replace the pump equipment, causing great direct or indirect losses

Images