Balanced type crescent seal gear pump

Abstract

The invention belongs to hydraulic elements in machinery industry, in particular to a balanced type crescent seal gear pump which comprises a pump body 1 (7), a main shaft (10), a front pump cover (11), an end cover (9), a rear pump cover (18), an inner gear 1 (5), an outer gear 1 (6) and the like, wherein the left side of the pump body 1 (7) is fixedly provided with a pump body 2 (15) through a locating pin (3) and a sealing ring; the left and right sides of the outer gear 1 (6) on the main shaft (10) in the pump body 1 (7) and pump body 2 (15) are respectively provided with an outer gear 3 (17) and an outer gear 2 (13) at equal intervals through a key (4); and an inner gear 2 (14) and an inner gear 3 (16) are respectively arranged in the pump body 1 (7) and the pump body 2 (15) corresponding to the outer gear 2 (13) and the outer gear 3 (17). The balanced type crescent seal gear pump reduces the action born by the bearing by the radial force born by a balance shaft, thus preventing the glue of the crescent seal gear pump from being failed.

Description

technical field [0001] The invention belongs to hydraulic components in the mechanical industry, in particular to a balanced internal meshing gear pump. Background technique [0002] Due to the large hydraulic pressure of the external gear in the oil suction chamber and the pressure transition area of ​​the internal gear pump, the shaft connecting the external gear and the bearing supporting the shaft are subject to a large radial force, causing the shaft to deform and affecting the gear pump bearings and other parts. The service life will reduce the transmission accuracy and mechanical efficiency of the gear. At the same time, because the oil suction chamber and the pressure transition area also generate a large hydraulic pressure on the internal gear, the outer wall of the internal gear generates a large pressure on the pump body. During high-speed rotation, if the lubrication is poor, severe friction will occur, so that the internal gear and the pump The body is glued to...

AI Technical Summary

Problems solved by technology

[0002] Due to the large hydraulic pressure of the external gear in the oil suction chamber and the pressure transition area of ​​the internal gear pump, the shaft connecting the external gear and the bearing supporting the shaft are subject to a large radial force, causing the shaft to deform and affecting the gear pump bearings and other parts. service life, reduce gear transmission accuracy and mechanical efficiency

At the same time, because the oil suction chamber and the pressure transition area also generate a large hydraulic pressure on the internal gear, the outer wall of the internal gear generates a large pressure on the pump body. During high-speed rotation, if the lubrication is poor, severe friction will occur, so that the internal gear and the pump body glued together, resulting in failure of the internal gear pump

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