RU2396669C1 - Local method of sealing end winding of traction electric machines with compound - Google Patents

Abstract

FIELD: machine building. ^ SUBSTANCE: compound is applied by dipping insulation of end winding of traction electric machine. A segment of insulation of the end winding of the traction electric machine is periodically immersed into a tank with compound during rotation of the machine. Simultaneously, impregnated with compound insulation of the end winding of the rotating traction electric machine is heated by means of infra-red radiators installed in an infra-red exciter along perimeter of middle circumference of the end winding of the traction electric machine. ^ EFFECT: upgraded quality of capsulation of insulation of end winding of traction electric machines, reduced power consumption and reduced time of process. ^ 1 dwg

Description

The invention relates to electrical engineering, in particular to the production and repair of electrical machines, for example windings of traction electric machines of locomotives and motor-car rolling stock.

There is a method of increasing the reliability of insulation of the frontal parts of the windings of electric machines, proposed by A.E. Nemirovsky, using elastomers based on synthetic rubber [1].

Also known is the method of triple impregnation of the insulation of the frontal parts of the windings with varnish modified with inhibitors, proposed by V.I. Charikov. After impregnation, the electric machines enter the drying oven. This method allows to increase the service life of an electric machine by 2-3 times [1].

The closest technical solution, selected as a prototype, is a method of encapsulating the insulation of the frontal parts of the windings of electrical machines using epoxy resins or compounds. The insulation of the frontal part of the winding of an electric machine is treated with a brush, spray or dipped in a special solution, and then the electric machine is placed in a drying oven to encapsulate the insulation of the frontal part [2].

The disadvantage of these methods and methods is that the technological operations for applying sealant to the insulation of the frontal part of the windings of electric machines and its subsequent encapsulation in drying ovens do not coincide in time. And putting an electric machine in a drying oven for heat treatment leads to significant energy costs for heating all parts and to increase the process time.

The objective of the invention is to improve the quality of encapsulation of the insulation of the frontal part of the windings of traction electric machines, reducing energy consumption and time for the process.

The solution of the proposed problem is achieved by the fact that the application of the compound on the insulation of the frontal part of the windings of traction electric machines and encapsulation using infrared radiation energy occurs simultaneously.

The technological process of sealing the insulation compound of the frontal parts of the windings of traction electric machines is represented by the circuit shown in the drawing. According to the proposed scheme, the operation of applying the compound by dipping the insulation of the frontal part of the winding of the traction electric machine is carried out by periodically dipping the insulation segment of the frontal part of the rotating traction electric machine in a container with the compound. Simultaneously impregnated with the compound, the insulation of the frontal part of the winding of a rotating traction electric machine is heated to a temperature of 100 ... 120 ° C using infrared emitters evenly located in the infrared irradiator along the perimeter of the middle circle of the frontal part of the winding of the traction electric machine.

As a result of applying local heating by infrared radiation to the insulation of the frontal part of the winding of the traction electric machine impregnated with the compound, insulation encapsulation occurs and the reliability of the traction electric machine is significantly increased by protecting it from external factors. Local heating by infrared radiation can reduce energy consumption by 7 ... 10 times and the time for technological operations by sealing compound of the frontal part of the winding of the winding of an electric traction machine by 5 ... 7 times.

Information sources

1. Pyastolov A.A. Operation of electrical equipment. - M .: Agropromizdat, 1990 - 287 p.

2. Koryagin S.I., Pimenov I.V., Khudyakov V.K. Methods of processing materials: Textbook / Kaliningrad. University - Kaliningrad, 2000 .-- 448 p.

Claims (1)

The local method of sealing the insulation of the frontal parts of the windings of the traction electric machines, including technological operations - applying the compound to the insulation of the frontal parts of the windings of the traction electric machines and encapsulating it with the help of infrared radiation, is carried out by periodically dipping the insulation segment of the frontal parts of the windings of the traction electric machines into a container with a compound and encapsulating it with infrared energy, characterized in that the technological operations - applying com Pound to isolate the frontal part of the winding of the traction electric machine and encapsulate it with infrared radiation at the same time.