SU951513A1 - Method of producing electric machine edge collector - Google Patents

Description

(5) METHOD FOR MANUFACTURING MECHANICAL

COLLECTOR ELECTRIC MACHINE

one

The invention relates to methods for manufacturing collectors of electrical machines and may find application in electrical engineering.

There are known methods for the manufacture of collectors, including operations for the preparation, preparation of carbon-graphite powders, pressing of plates from them (in some cases impregnated with special compositions to increase mechanical strength), followed by annealing, machining, assembly into a package (l.

The disadvantages of these collector fabrication methods are the complexity and duration of the process; In addition, the collectors obtained by such methods do not have sufficient mechanical strength, and the use of reinforcing, impregnation leads to the complication of the technology of manufacturing the collector.

A known method of making collectors involves forming a collector by pressing. a package of alternating insulating and carbon-impregnated carbon bands (elements) followed by machining f2.

5 The closest to the invention in its technical essence is a method for producing end face collectors, which includes forming a collector bag from a binder impregnated continuous strip of carbon fabric, pressing, heating the binder to polymerization and machining the f3j collector.

However, this method is characterized in that it requires prior removal from the inner side of the tape of a piece of material in the form of triangles to ensure a uniform thickness of the collector. Orientation and winding

Claims (3)

2G carbon ribbons per edge is a rather complicated process; In addition, it is impossible to ensure exact coincidence of interlaminal holes in the process of winding the tape, but due to the presence of deformations of the tape during winding. In this connection, subsequent milling of interlaminar grooves is required. Collectors made by this method are unsuitable for operation as end collectors, since this leads to uneven wear of the working surface of the collector and increased electrical losses in the body of the lamellae, because current passage occurs across layers of carbon fabric impregnated with polymeric binder. isolator This requires the prior manufacture of a collector body. The aim of the invention is to simplify the fabrication technology of a carbon fabric based collector. This goal is achieved by forming the collector body by winding an insulating fabric impregnated with a polymeric binder onto a mandrel, winding flat carbon fabric forming the collector bag on the body, and then jointly pressing it in the axial direction, polymerizing and producing the collector. Figs 1 and 2 show the implementation of the proposed method. A continuous strip of insulating fabric is impregnated onto a rotating mandrel 1 with a continuous strip of insulating fabric, forming a collector body 2. Then, a continuous strip of carbon fabric, also impregnated with a binder, is wound onto the body 2 of the insulating fabric. As a result, a collector bag 3 of carbon fiber material is formed, which serves as a billet for the collector lamellae, which is planted on the insulating body 2. The number of turns of carbon and insulating fabric, as well as the width of the tape, are determined by the size of the collector. TMP-3, TGN-2M. The insulating body is made of TC-8 silica fabric. For the impregnation of carbon and insulation fabrics, silicone silicone resin T-1 is used. The collector blank thus obtained is removed from the mandrel 1 having a small cone and placed in the mold 4. In this case, 34 finger 5 of the mold 4 enters the opening of the collector blank. A pressure of 200 atm is applied to the movable core 6 to obtain a monolithic collector. The axial length of the collector is reduced relative to the axial size of the workpiece. Temperature is maintained in the mold. During the pressing process, the binder is polymerized, which ensures the solidity and mechanical strength of the collector. After crimping, the collector is fed to a mechanical treatment, including the separation of the collector package 3 of carbon fiber material into electrically insulated lamellae. This invention makes it possible to significantly simplify the process of making carbon fiber based collectors, and to reduce the consumption of carbon fabric. Collectors made by the proposed method are suitable for use as face collectors. The invention The method of manufacturing an end collector of an electrical machine, comprising forming a collector bag from a binder-impregnated continuous strip of carbon fabric, pressing, heating the binder to polymerization and machining the collector, which, in order to simplify the manufacturing technology, the body the collector is formed by winding an insulating fabric impregnated with a polymeric binder onto a mandrel; flat carbon fabric is wound onto the casing, forming a collector pa ket, and then jointly pressurized in the axial direction. Sources of information taken into account in the examination 1. Patent of the GDR №, cl. 21 d 59, 1968. 2. USSR author's certificate number bi + W, cl. H 01 R 43/06, 1978. 3. USSR author's certificate for application No. 2735650 / 24-07, cl. H 01 R 43/06, 1978.   rrr - { . h I HH h 1 H V., H 1