SU1330681A1 - Carbon and graphite commutator of an electric machine - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used in the design of a carbon-light collector of an electric machine of low power. The aim of the invention is to increase the mechanical strength of the collector. The carbon-fiber collector contains collector plates 1 with longitudinal fastening lugs 2, separated by grooves 4 and pressed by plastic along the inner surface. The protrusions 2 are formed by through cylindrical holes, the axes of which lie in the plane of symmetry of the grooves at the same distance from the collector axis, and in the longitudinal protrusions additional through cylindrical holes are made, the axes of which lie in the planes of symmetry of these projections . The radii of the holes are chosen from the ratio O, 1; g / g i 0.4, and the distances from the axes of these holes to the collector axis are chosen from the ratio 0.8, 0.95, with the sum R + where r is the radius of the through hole + r 2 of the cylindrical hole J g is the radius of the additional through hole cylindrical bore, R, is the distance from the axis of the through hole to the axis of the collector; R is the distance from the axis of the additional through cylindrical hole to the axis of the collector, and the distance from the axis of the collector to the surface of the protrusion nearest to it is chosen less than the radius R. 2 Il. & (L 00 oG) 00

Description

113

The invention relates to electrical engineering and can be used in the design of a graphite collector of an electric machine of low power.

The aim of the invention is to increase the mechanical strength of the collector.

Figure 1 shows a carbon graphite collector, a cross-section; 2 a collector plate.

The carbon collector collector contains collector plates 1 with longitudinal mounting lugs 2 formed through cylindrical through holes

3 radii r, the axes of which lie in the first plane of the geometry of the grooves 4 separating the collector plates 1, at the same distance R from the axis of the collector, and D longitudinal projections made additional through cylindrical holes 5 of radius r, whose axes lie in the planes of symmetry these protrusions at the same distance Rj from the collector axis. The radii of the holes are chosen from the ratio

0.1

2 g

0.4.

The radius ratios are -

and

The distances from the axes of these holes to the collector axis are chosen from the ratio

0.8 b, 0.95,

moreover, the sum Rn + r is R, and the distance from the collector axis to the protrusion surface nearest to it is chosen to be less than the radius R o.

- selected outcome of the analysis for example - 1

deformed state given by the external diameter and the number of collector plates.

R + R

Mr. R,

selected

Proceeding from the fact that in case of failure of the fastening protrusion in the dangerous section A-A (Fig. 2), the collector plate 1 will be held in the plastic case 6 due to the remaining part of the fastening protrusion 2 as a grounded beam.

The end parts of the collector plates 1 are not covered by plastic 6, which allows the plate to expand freely when heated.

Primer p. With a step along the collector equal to 2.9 mm and the external diameter of the collector 34 mm, choose a radius R equal to 12.3 mm, a radius g additional posture 5 equal to 0.3 mm.,. R

Then from the ratio - 0.95, DIM, that R, is 12.9 mm. The sum of the radii R-t- g

12.6,

those. polyphenol condition R - i g R. The radius of the groove separating the longitudinal fastening protrusions 2 is determined from the ratio 5

1a

pa0

five

five

Sheni - 0.3 /. Then the radius of

veins 0.8 mm.

Taking into account the angle of the graphite collectors, they have a greater switching resistance than copper, it is permissible to reduce 1 the number of collector plates and increase the number of sections in the cortex with a post-collector diameter. Due to this, it is possible to increase the step along the collector with a simultaneous increase in the mechanical strength of the fastening lugs of the collector. The carbon-graphite collector provides for an increase in the mechanical strength and solidity of the collector, the attachment of the fixing protrusion makes it possible to reject the bandage, the absence of mica insulation between the plates and the reduction in the length of the plastic casing save the insulation materials and reduce the weight of the collector. Taken together, the quality improvement and simplification of the carbon-graphite manifold manufacturing technology.

Claims (1)

Invention Formula 0 A carbon-graphitic collector of an electric machine containing collector plates with longitudinal fastening tabs, separated by grooves and picked up by plastic on the inner surface, characterized in that, in order to increase the mechanical strength, the tabs are formed through cylindrical through holes 0, the axes of which lie in the plane symmetry of the grooves at the same distance from the collector axis, and additional through cylindrical holes are made in the longitudinal projections, The 5 axes of which lie in the planes of symmetry of these protrusions at the same distance from the axis of the collector, and the radii of these holes are chosen from the ratio 0.1 0.4, and the distance from the axes of these holes to the collector axis is selected from the ratio 0.8 1 0.95, moreover, the sum RJ +, where r, is the radius of the through cylindrical hole;  g is the radius of the additional through cylindrical bore; R is the distance from the axis of through holes to the collector axis, R is the distance from the axis of the additional through cylindrical hole to the collector axis, and the distance from the collector axis to the protrusion surface nearest to it is less than the radius R ,. Editor A.Makovska Compiled by V. Volkov Tehred L. Serdyukova Order 3587/53 Circulation 625 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, And (picture 2 Proofreader A.Zimokosov