SU1522334A1 - Electric machine commutator - Google Patents

Abstract

The invention relates to electrical engineering and can be used in electric machines having a cylindrical rotary collector of the arched type. The purpose of the invention is to increase reliability by eliminating mechanical damage to the insulating cone. The collector comprises plates 1 with a dovetail-shaped base, a pressure ring device 2 with an annular conical protrusion 3 and an insulating cone separating the plates 1 from the device 2. In the proposed design, the insulating cone is made of two parts 4 and 5, and at the end a protrusion from the inner surface of the device 2 is made annular groove 6. Part 4 is located on the outer surface of the device 2 and is installed at one end into the groove 6. Part 5 is installed on the front side of the base of the collector plates 1. Both parts can one is relative to the other at the place of their contact, thereby eliminating mechanical damage to the insulating cone. 1 il.

Description

The invention relates to electrical engineering, and more specifically, to the design of the collectors of electrical machines, and can be used in machines having a cylindrical rotating collector of arched type _o

The purpose of the invention is to increase reliability by eliminating mechanical damage to the insulating co. noosa.

The drawing shows the proposed collector, a longitudinal section.

The collector contains plates 1 with a dovetail shaped mounting part assembled in a circular arch. The dovetail protrusions form a conical shape in the end part of the circular arch, a pressure ring element 2 with an annular protrusion 3 having a conical surface. The plates 1 are isolated from the pressure element 2 by an insulating cone made of parts 4 and 5, At the end of the annular protrusion 3, on its conical surface, an annular groove 6 is made to a depth corresponding to the thickness of the insulating cone part 4. Part 4 is located on the outer surface of the push ί device 2 and is installed with one end in the bottom of the groove 6. Part 5 is installed on the conical surface of the annular arch and has an overlapping zone with the part where they are moved relative. The bottom of the groove 6 and the overlapping zone of parts 4 and 5 are located within the parts of the conical surfaces of the circular arch and the annular pressure element overlapping each other. Between the plates 1. and part 4 of the insulating cone, a gap 7 is provided, which makes it possible to compress the collector during operation and fill with a sealing putty.

The insulating cones of the collectors can be divided into two functional zones: one of which performs. insulating function; DRU gaya - insulating and mechanical.

In known designs, the insulating cones were made of the same material based on the same composition.

In the proposed design, it is more expedient to use various materials for the manufacture of parts 4 and 5 of the cone.

Since part 4 is designed to ensure isolation of the plates from the pressing device 2, it is advisable to make it from a layer of impregnated fiberglass.

Carrying out the insulating function, the impregnated fiberglass can carry mechanical stress.

Part 5 in this design of the insulating cone performs both insulating and, to a greater extent, mechanical functions. It can be made of binder-impregnated layers of mica and fiberglass and a layer of polymer film.

The use of mica plastics is justified by the fact that, in contrast to micanites, mica plastics are less expensive material, their strength in the heated state is much higher than that of micanites, and they are more uniform in thickness.

Part 4 is molded directly on the pressure cone. Part 5 of the insulating cone is made in the mold by an independent product and then installed in the collector.

Technical and economic advantages of the proposed collector compared with the known due to the elimination of mechanical damage to the insulating cone. The manufacturing process of the insulating cone is less time-consuming, since the complex shape is divided into two simple ones, in addition, reducing the consumption of material going to its manufacture, allows to reduce its cost.

Claims (1)

Claim The collector of an electric machine containing conductive plates with a dovetail-shaped fastener assembled in a circular arch so that the protrusions of the dovetail form a surface in the end part of the circular arch. A conical shape, an insulating cone, consisting of two parts connected by superimposing the ends of these parts, a pressure ring element with an annular protrusion and an inner conical surface, an annular groove is made on the end of the protrusion on its conical surface, the depth of which is ⁵ 1522334 swarm equal to In the case of insulation, one of the parts of the insulation cone, the end of the specified part of the insulation cone abuts against the bottom of the annular groove, the overlap zone of the two parts of the insulation cone is in the gap between the circular arch and the pressure ring element, one part of the insulation cone is located on the outer surface of the pressure cone ring element, characterized in that, in order to increase reliability by eliminating mechanical damage 6 of the insulating cone, the first part of the insulating cone located on the outer surface of the pressure member abuts against the bottom of said annular groove, and the second part of the insulating cone is located on the conical surface of the circular arch, and the bottom of the annular groove and the overlapping area of the two parts of the insulating cone are within parts conical surfaces of a circular arch and an annular pressure element overlapping each other.