Repairing method of large DC motor bus ring insulation support block

Abstract

The invention discloses a method for repairing an insulating support block of a large DC motor bus ring. In the method, the binding tape and the old insulating support block of the DC motor bus ring are first removed, and cleaned; The insulating support block, the front end of the first stay and the front end of the second stay are provided with vertical grooves, the rear end of the first stay is provided with a groove with an upward opening, and the rear end of the second stay is provided with a downward groove; After the first stay and the second stay are made and formed, the surface is cleaned and impregnated with insulating paint. The first stay and the second stay are arranged between the positive and negative bus rings, and the front groove is embedded in the bus connected to the positive electrode bus ring. Copper bar, the rear end grooves sandwich the negative collector ring from the upper and lower sides; use bolts to fasten to complete the repair of the insulating support block. The method effectively overcomes the defects of the traditional insulating support block structure and repair. By making the insulating support block with a simple structure, the off-line repair of the motor is avoided, the on-site maintenance and replacement of the insulating support block is convenient, the maintenance efficiency is improved, and the repair cost of the motor is reduced.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a method for repairing an insulating support block of a large DC motor commutator ring. Background technique [0002] DC motors have good speed regulation performance and overload capacity, and are widely used in various production lines, such as hot rolling R series, F series rolling mills, cold rolling stand motors, etc. Due to the long-term operation of the motor online, the insulation of the windings and other parts is seriously aged. [0003] The armature loop current of large DC motors is very large. For example, the rated capacity of the 2050 hot-rolled R2 motor is 6200KW, and the armature current is 6325A; the rated capacity of the F series rolling mill motor is 5000KW, and the armature current is 5085A; the 2030 cold-rolling stand motor The rated capacity is 1500KW, and the armature current reaches 1720A. Therefore, a multi-circuit parallel structure is mostly ...

AI Technical Summary

Problems solved by technology

The advantage is good electrical and mechanical performance; the disadvantage is that the motor needs to be repaired offline, the construction period is long, and on-site maintenance and repair are difficult

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