SU632021A1 - Electric machine current-collecting device - Google Patents

Description

one

The invention relates to the field of electrical engineering.

Current collectors are known in which the current-carrying elements of a rotating current collector, collector:.: An oracle or contact ring is made of graphite ij.

These designs do not have the disadvantages inherent in collector devices with a copper collector or slip rings. However, the drawbacks of such devices are the technological complexity of the implementation of a rotating current collector made of graphite; the laboriousness of attaching the winding wires V. to the lamellae of the collector or to the body of a slip ring and the reduced mechanical strength of the graphite current collector.

The designs of current collector devices of electrical machines, which are the prototype, contain a rotating current collector (collector or slip ring), whose conductive elements are made of metal, such as copper, and graphite electric brushes 2 J.

The disadvantage of such devices is a large variable coefficient.

and

rubbing a brush over a metal collector or slip rings at different climatic and altitude effects, which dramatically affects the wear of both the metal collector or slip rings and the brushes themselves. With various factors of the work of the product, it is also not possible to create a stable polish on the number of sectors or contact rings, which means that the work of the brush collector assembly.

The aim of the invention is to increase the service life of a collector device,

This is achieved by the fact that along the external diameter of the rotating current collector (collector or slip ring) on the surface: the chinks of its conductive elements made of metal — on the other hand, of copper — are made of a spiral. grooves filled with compacted graphite mass. The grooves are preferably made in the shape of a dovetail,

FIG. 1 shows a combined copper-graphite manifold with a graphite brush; in FIG. 2 - section A-A of FIG. 1 in FIG. 3 - Combine u nth copper-graphite contact ring with a graphite brush.

The outer diameter of the collector 1 in its copper lamella x 2 is made of spiral grooves 3 in the shape of a swallow; tail.

The grooves 3 are filled with compacted graphite mass. A graphite brush 4 contacts the surface of the collector 1,

Similar grooves 3 can be performed on the outer surface of the copper slip ring 5.

When the collector rotates due to the spiral grooves 3 with the graphite mass pressed into them, the graphite brush 4 evenly rubs along the copper and graphite portions of the collector surface or contact ring, forming contact pairs: graphite graphite, graphite-copper, resulting in a good reliable sliding contact, it also produces a stable collector varnish, ring contact in all modes of operation of the product.

The invention makes it possible to significantly, by 30-50%, increase the wear resistance of a current collection device (collector-brush slip ring-brush) compared to a copper collector or contact ring, thereby increasing the service life of an electric machine without replacing brushes in operation.

Claims (1)

1. USSR author's certificate P 73671, cl. H 01 T 39/04, 1949. 2 about Livshits PS The sliding contact of electric machines, M., Energie, 1974., p. 23-24. UHF / B. Vk U: U UUU UH: U) X% -: ssnisississ: s .: 4v: s. ::; N: VV ST.; .-.  H-A U / H-; 4 v (rig. 1 A-1 FIG. g