Positioning mechanism for disassembling and assembling gear shaft for gear pump

Abstract

The invention provides a positioning mechanism for disassembling and assembling a gear shaft for a gear pump. The positioning mechanism comprises a base which is of a rectangular plate seat structure.A slideway of a rectangular notch structure is arranged in the middle position of a plate seat, and a double-head reverse lead screw is mounted in the slideway in a rotary fit manner; a slide rail structure is arranged in the middle position of the slideway and left and right slides are matched slidably through the slide rail structure. As magnetic pole carbon brushes of the carbon brush type gear pump are located on two end covers, two end pipes supported by a pipefitting are located on the same axis, and at the moment, the gear shaft between the two end covers is in butt joint through middle areas of the end covers. In the butt joint process, the two end covers subjected to action of the slides sliding on two sides are tightened synchronously, so that the gear shaft is mounted on original magnetic pole carbon brushes on the inner sides of the left and right end covers more reasonably, and therefore, the accuracy of the mounted gear shaft in the carbon brush type gear pump is improved, and the assembling quality of the gear pump is improved.

Description

technical field [0001] The invention belongs to the technical field of positioning mechanism structure, and more specifically relates to a positioning mechanism when a gear shaft for a gear pump is folded and assembled. Background technique [0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to deliver or pressurize the liquid. Two closed spaces are composed of two gears, the pump body and the front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged increases from small to large, forming a vacuum to suck the liquid, and the volume of the space on the side where the gears mesh changes from large to large. Small, and the liquid is squeezed into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of two gears. The pressure at the outlet of the gear pump depends entirely on the r...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a positioning mechanism when the gear shaft of the gear pump is folded to solve the problem that the existing gear pump described above lacks a reasonable positioning mechanism when the gear shaft is installed, resulting in inaccurate installation and positioning of the gear shaft , especially when the internal gear shafts of some gear pumps with electronic carbon brushes at both ends are installed, unlike the gear pumps with bearing-type fixed structures at both ends, the gear shafts are fixed by bearings, and the carbon brushes The type of gear pump adopts carbon brushes to be directly buckled on both sides of the gear shaft. Since the carbon brushes at both ends of this gear pump are elastic and flexible, if the gear shaft is installed, there is no reasonable positioning mechanism at both ends, which will eventually cause After the gear shaft is fixed in the pump chamber, it will deviate, which will affect the normal rotation action, or generate a lot of noise during the rotation process.

Images