Insulation pad fixing method of motor remanufacturing sliding bearing pedestal

Abstract

The invention relates to insulation pad fixing method of a motor remanufacturing sliding bearing pedestal, which comprises the steps of S1, preparing an activating solution, specifically, adding refined naphthalene into tetrahydrofuran, dissolving to obtain a refined naphthalene solution, adding metallic sodium into the refined naphthalene solution under the protection of an inert atmosphere, anddissolving the sodium to obtain a dark green activating solution; S2, under the protection of the inert atmosphere, immersing polytetrafluoroethylene paper of which the surface is subjected to rough surface treatment into the dark green activating solution until the rough surface of the polytetrafluoroethylene paper changes color; S3, taking out the polytetrafluoroethylene paper, washing with absolute ethyl alcohol and clear water, and drying; S4, cutting the dried polytetrafluoroethylene paper according to the shape of a lower end bush seat of a bearing chamber to obtain a polytetrafluoroethylene insulation pad, and adhering the polytetrafluoroethylene insulation pad to the lower end bush seat by adopting high-temperature and low-temperature resistant glue; and then pressing a pressing block matched with the inner radius of the bearing chamber on the polytetrafluoroethylene insulation pad, fastening an upper end bush cover and the lower end bush seat, and placing the fastened upper end bush cover and lower end bush seat for 20-30 hours so as to enable the polytetrafluoroethylene insulation pad to be firmly bonded to the bush seat.

Description

technical field [0001] The invention relates to the technical field of motor remanufacturing, in particular to an insulating pad fixing method for a motor remanufacturing sliding bearing seat. Background technique [0002] Most of the medium and large motors use sliding bearings. When the motor leaves the factory, polytetrafluoroethylene insulating pads are glued on the upper and lower shoe seats of the sliding bearings to ensure the insulation of the sliding bearings and cut off the parasitic current of the shaft and bearings when the motor is running. (shaft current). The generation of parasitic current will form a tiny arc between the motor shaft and the bearing bush, erode the surface of the bearing bush and the journal, melt the Babbitt alloy on the bearing bush, corrode the lubricating oil at the same time, weaken the efficacy of the lubricating oil, and affect the normal operation of the motor run. [0003] The insulating pads of newly manufactured medium and large ...

AI Technical Summary

Problems solved by technology

The process of replacing the fixed insulating pad is very difficult, mainly because the tile seat of the old motor has been soaked in engine oil for many years, and the bonding surface contains oil; in addition, the bonding surface is not a newly processed surface, and the smooth PTFE insulating pad is difficult to firm Bonded on the tile seat to achieve the predetermined effect

In this case, it is difficult to obtain the desired effect even with some adhesives