RU8537U1 - DISC ANCHOR ELECTRIC MACHINE - Google Patents

Abstract

1. A disk anchor of an electric machine, comprising an intermediate gasket and half-turn disks mounted on its ends, the half-turns of the disks being connected to each other along the outer diameter to form protrusions, central holes are made in the disks and the gasket, in which the washer with a mounting hole is fixed, characterized in that protective washers are attached to the outer ends of the half-turn disks, the thickness of the central washer does not exceed the thickness of the armature, and the diameter of the intermediate gasket is chosen from the condition d = D - 2h, where d is the diameter KSR gasket; D - diameter of the armature disk; h - height of the projections yakorya.2 disk. An anchor according to claim 1, characterized in that the protective and insulating washers are made of fiberglass. Anchor according to claims 1 and 2, characterized in that the outer surfaces of the protective and insulating washers are made in black.

Description

DISC ANCHOR ELECTRIC MACHINE

The utility model relates to the field of electrical engineering and can be used in electric machines with a flat anchor.

A disk anchor for a direct current electric motor with an axial air gap is known, comprising two disks located on two sides and fixed on an intermediate gasket, consisting of half-coils that are connected, for example, are welded along the outer and inner forming the extreme disks (all disks and intermediate gaskets have central holes), so that they form the outer and inner shells. Half-turns of disks located on both sides relative to the intermediate gasket are subject to connection with each other. A washer with a protrusion and a landing hole made in it for installation on the shaft of an electric machine is fixed in the inner hole of the armature (hole of the disks). If the diameter of the intermediate gasket is less than the diameters of the disks formed by half-turns (conductors), then a washer is provided in the structure and anchors, the inner diameter of which is larger than the outer diameter

lining intermediate. On one of the half-turn disks, on its outer surface, a collector path is formed, intended for contact with the brushes of an electric machine.

It is possible to perform a multi-layer disk anchor with several intermediate gaskets and half-turn disks (see US Pat. No. 4,221,499, cl. 310/268, 1982 - the closest analogue).

As a result of the analysis of the design of this disk anchor, it should be noted that it has low rigidity, due to the fact that the diameter of the intermediate strip is much smaller than the diameter of the half-turn disks, a protrusion made on the washer.

MKIBN02K21 / 10

increases the axial dimensions of the disk armature and, therefore, the electric machine as a whole, which does not allow it to be used in units installed in crowded spaces. Reduces the area of use of the disk anchor and the performance of the mounting holes in the washer without taking into account the loads acting on the anchor. The end surfaces of the half-turn disks have a high roughness, which leads to ventilation losses, and foreign particles, for example, crumbs of the brushes of an electric machine, as well as a decrease in the gap between the armature and magnets, can result in failure due to electrical breakdown, as between conductors, and between the anchor and the body (magnets).

The objective of this solution is to create a disk anchor with high rigidity, small axial dimensions, with a wide range of applications and high reliability.

The problem is solved in that in the disk anchor of an electric machine containing an intermediate gasket and half-turn disks mounted on its ends, moreover, half-turns of the disks are connected to each other along the outer diameter with the formation of protrusions. The central holes are made in the disks and the gasket, in which the washer with the mounting hole is fixed. New is the fact that protective-insulating fiberglass washers are glued to the outer ends of the half-turn disks, and the outer end surfaces are usually black. The thickness of the washer does not exceed the thickness of the anchor, and the diameter of the intermediate disk is chosen from the condition:

d D-2h (1)

D is the diameter of the disk anchor;

h is the height of the protrusions of the disk anchor.

The essence of the utility model is illustrated by graphic materials, where;

in FIG. 1 - disk anchor, axial section;

in FIG. 2 is a view A of FIG. 1;

in Fig.Z - disk anchor with several intermediate disks, axial section.

The disk anchor of an electric machine consists of an intermediate gasket (which can be made of plastic, ceramic or metal with an insulating layer on the end surface), on both sides relative to which at its ends there are disks 2 and 3 of half-turns made of copper or aluminum. Semi-turns of disks mounted on both sides relative to the intermediate gasket are connected to each other (for example, by welding) to form protrusions 4. A washer 5 is fixed in the holes of the disks 2, 3 and gasket 1 with a mounting hole 6 and mounting holes 7. The thickness of the washer does not exceed the thickness of the disk anchor, which reduces the axial dimensions of the anchor. On one of the half-turn disks, for example, 3 there is a collector track 8.

The connection of the disks 2 and 3 with the gasket 1 is carried out in a known manner using known means. If the intermediate gasket 1 is made of metal (for example, aluminum), then insulating gaskets are installed between it and disks 2 and 3 or they are coated with an insulating layer (for example, varnish) (not shown in the drawings and are not indicated by the position). Half-turns (conductors) are indicated by 9.

as a rule, protective insulating washers or their external surfaces are black.

The diameter of the intermediate strip 1 is selected from the condition

, (one).

For the implementation of the working cycle, the disk anchor with the mounting hole 6 is installed on the shaft of an electric machine (not shown) and fixed through the mounting holes 7 with fasteners to the shaft hub. Mounting holes, their number and size are performed depending on the loads acting on the disk during its operation. Holes can be made during the installation of the disk. The bore hole can also be sized to fit before mounting the disc. This allows you to expand the scope of application of anchors for various electrical machines.

To the collector track 8, the brushes of the electric machine are pressed. To ensure contact of the brushes with the collector track on the disk 3, fiberglass washers 11, 12 are installed, between which an annular gap is formed in which the collector track is located.

When the electric machine is operating, an electric voltage is applied to the brushes, under the influence of which a current begins to flow in the half-turns of the disks 2 and 3, the interaction of which with the magnetic field of the permanent magnets of the electric machine provides torque to the machine shaft.

The protrusions 4 on the outer surface perform at a certain distance (L) from each other. Elements of the angle sensor of the armature, for example, an LED and a photodiode, can interact with the protrusions. The accuracy of the angle of rotation is determined by the number of protrusions, the error of their location in diameter and number

sensors mounted offset from each other by a certain angle.

The presence on the outer end surfaces of disks 2 and 3 of protective insulating gaskets made of fiberglass allows to reduce ventilation losses during rotation of the disk and increase the reliability of the armature by eliminating the ingress of foreign particles onto the half-coils (waste from the operation of the collector-brush assembly of copper graphite), as well as the influence mechanical and climatic effects on the anchor and reducing the gap between the surface of the anchor and magnets. Surfaces become flat and smooth. Application of black coatings on gaskets (as well as the choice of black material as gaskets), can improve the temperature regime of an electric machine.

The choice of the diameter of the intermediate gasket 1 according to dependence (1) eliminates the interruption of half-turns of disks 2 and 3, as well as increases the stiffness of the disk armature, which expands its field of application, significantly increases its service life and electric brushes and collector, and also reduces the level of dynamic noise.

The disk anchor can be multilayer of several layers of disks similar to those described above and separated by an insulating gasket (not indicated by the position).

The manufacturing process of the anchor is carried out by well-known technologies using standard equipment.

We believe that the information presented in the application materials is sufficient for the practical implementation of the utility model.

Claims (3)

1. A disk anchor of an electric machine, comprising an intermediate gasket and half-turn disks mounted on its ends, the half-turns of the disks being connected to each other along the outer diameter to form protrusions, central holes are made in the disks and the gasket, in which the washer with a mounting hole is fixed, characterized in that protective washers are attached to the outer ends of the half-turn disks, the thickness of the central washer does not exceed the thickness of the armature, and the diameter of the intermediate gasket is selected from the condition
d = D - 2h,
where d is the diameter of the intermediate gasket;
D is the diameter of the disk anchor;
h is the height of the protrusions of the disk anchor.  2. Anchor according to claim 1, characterized in that the protective and insulating washers are made of fiberglass. 3. Anchor according to claims 1 and 2, characterized in that the outer surfaces of the protective and insulating washers are made in black.