SU736233A1 - Brush-commutator assembly of reversible electric machine - Google Patents

Description

one

The invention relates to electrical engineering, in particular to the structures of brush-collector assemblies of a reversible electric machine. Brush collector assemblies of electrical machines are known, which include a collector, a brush holder in which a brush and a pressure device are located that ensures that the brush is pressed on the collector plates. The brush holder is made in the form of a single-arm lever resting on supports 1 and 2 ,.

The disadvantages of such constructions are the displacement of the brush from the collector neutral caused by the wear of the brush. 5 work process, and insufficient stability of the electrical contact between the brush and the collector when reversing the work of the electric machine.

Also known is the brush-collector assembly of a collector electric machine, comprising a collector, a brush holder made in the form of a two-arm lever, at one end of which 25 a brush is rigidly fixed, a pressure device in the form of a spring connected to the two-arm lever at a point shifted from the brush by the support two shoulders rychcha 3, 30

The purpose of the invention is to increase the stability of the electrical contact between the brush and the collector during reverse operation of the electric machine.

This is achieved by the fact that in an inaccurately collector unit of the reversible electric machine, the brush is equipped with an additional box-shaped brush holder, and the support of the two shoulders is made of two parts, each of which is located symmetrically with respect to the longitudinal axis of the lever, and the sizes of the arms of the two shoulders and the distance between the parts of the support and the height of the brush is taken from the ratio

 i.-l.

L

20

where t

- distance between two

to

parts of the support, 6 tp - shoulders of the lever, g - the maximum height of the brush, ja - coefficient of friction of the brush

o collector

FIG. 1 shows a view of the side of the brush holder; in fig. 2 - view of the node from the end of the brush holder and collector;

Claims (1)

Claim A brush-collector 'assembly of a reversible electric machine, comprising a brush holder collector made in the form of a two-armed lever, at one end of which the brush is rigidly fixed, a pressing device in the form of a spring connected to the two-armed lever at a point shifted from the brush behind. two shoulder arm support. characterized in that, in order to increase the stability of the electrical contact between the brush and the collector, the two-arm lever with the pressure device is parallel to the axis of the collector, the brush is equipped with an additional box-shaped brush holder, and the support of the two-arm lever is made of two parts, each of which is located symmetrically relative to the longitudinal axis of the lever , and the values of the shoulders of the two shoulders of the lever and the distance between the parts of the support and the height of the bristles of the ratio μ ?. G G G 9 --- - the distance between the two parts of the support, - shoulders of the lever, - maximum brush height. - coefficient of friction of the brush on the collector.