SU1413692A1 - Rotor of synchronous machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to simplify and increase the reliability of fastening the frontal parts of the coils. The rotor contains a multi-pole magnetic core mounted on shaft 1, multilayer electric coils 4 at the poles 3 of the magnetic core, spacers 5, located in the front parts of the coil and forming radial cooling channels of the front parts of the coils. Remote spacers have the shape of I-beams, the heads of which 6 cover the coils in the frontal part of the top and bottom along all layers of the coil located in the axial direction before and after the strip. This allows you to increase the strength of the frontal parts, 2, about f-ly, 8 Il. Sh

Description

1

I The invention relates to electro-mechanical design, namely to the design of a rotor of synchronous electric manifolds.

The aim of the invention is to understand and increase the reliability of fastening the frontal parts of the pole coils.

FIG. 1 schematically shows a rotor, a longitudinal section; in fig. 2 same, top view; Fig. 3 shows an I-shaped spacer; FIG. 4 is a variant of a remote gasket made from a non-magnetic metal wave, with insulation applied; in fig. 5 - a combined spacer, consisting of a pair of Remote shims connected by the S ends of the heads of the I-beams with tangent elements; FIG. 6 is the same, manufactured by waste-free technology; in fig. 7 - the same, with the radial arrangement of the racks, made by wasteless technology; FIG. 8 shows a rotor (end view) with jumpers connecting between the tangential elements of spacer gaskets of the coils of all poles.

The rotor of a synchronous machine consists of a pole 1-P-1Ы 2 located on the shaft i, which has newly expressed poles 3 on which electrical coils 4 are wound (or worn) between the coils 4 and the spacers 5, which are located the shape of an I-beam with heads 6. When winding the coil 4, spacers 5 are installed so that their heads 6 cover the height of the coil 5 both in all layers 7, located in the axial direction up to the strip 5, and in all layers 8, located axially after laying 5. Radial channels 9 are formed between the gaskets 5, which serve to pass air cooling the frontal parts of the coil 4. Gaskets 5 can be made of an insulating material, for example, a textolite, or, in versions, of a nonmagnetic metal, for example brass In this latter case, the inner edges of the gasket are insulated with insulation 10, Coils 4 with installed gaskets 5 are impregnated with a lacquer or compound.

In the embodiment, when two gaskets 5 are installed in one frontal part, the corresponding height of the ends of their heads 6 are connected to each other by tangential elements 11 and form a combined distance gasket (Fig. 5). In this case, it is advisable to make the gaskets 5 and the elements I1 of a non-magnetic metal (brass, non-magnetic steel) and make their connection by welding (welding seams 12 are shown in Fig. 5). In an embodiment, a combined spacer can be obtained by wasteless technology from a metal (e.g. brass) tire; in this case, two rectangular contours — upper and lower — are made of the tire, which, by means of welding seams 12, are connected to one another by two vertical posts 13 from the same tire (Fig. 6). In another possible embodiment of the design, the upper tangential elements of the combined gasket have a width of 14 greater than the width of the 15 lower elements, and the ratio of these widths is chosen so that when the combined gasket is installed in the frontal part of the coil 4, the connecting struts 13 are located in radial directions 16 (Fig. 7). In the considered structures of figures 6 and 7, the number of welded joints 12 was also reduced (six welded joints instead of eight in Fig. 5). In the following embodiment, the tangential elements 11 spacers in the ends of adjacent poles are connected to each other by jumpers 17 and form together with them a closed ring along all the coils 4 of the rotor. The jumpers are connected in any known manner, for example with screws 18 installed in holes 19 to 11 (Fig. 8).

The rotor of the synchronous machine works as follows.

When the rotor rotates in the bore of the stator of the synchronous machine and the excitation current passes through the coils 4, the latter are loaded both thermally and mechanically. From the water heat from losses in the frontal parts of the coil is produced by the passage of cooling air through the radial channels 9 formed by spacers 5, as a result of centrifugal air release from the rotor rotation. Mechanical loads occur

From the centrifugal forces of the rotating masses and under their action the cantilever frontal parts 8 of the coils 4 tend to deform, bending towards the 20 bores of the machine. Gaskets 5 prevent this bending, the heads of which 6 cover the coil from above and below in height, giving coil 4 properties of solidity, since in this case the total cross section of all turns of the coil in the frontal part, including layers 7 with a smaller console, simultaneously resists bending forces and, therefore, possessing much greater rigidity. At the same time, the integration of resisting bending sections goes both along vertical rows of coil turns, covered by coil heads 6 that limit the height of the coil, and along horizontal rows of dpm, where the bending deformation is exerted by the forces that press the pad 5 to the inner layers 7 of coil 4, m. e is the sum of the tension of the wires of the outer layers 8 of the coil 4 when they are wound up horizontally. As a result, the gasket 5, made in the form of an I-beam, engages with the coil 4 in such a way that

prevents deformation of the full cross section

neither the coil in both the radial and axial directions. The connection of the gaskets 5 to one another by means of tangential elements is carried out for the purpose of further strengthening the lob-Bbtx parts of the coil. In this case, the elements (by themselves) 11 accurately fix the distance between the gaskets in the tangential direction, and when winding, the conditions for the correct installation of the combined gaskets are facilitated, their total rigidity decreases, which ultimately leads to a more reliable design. The implementation of the combined remote pads using waste-free technology (Figs. 6 and 7) provides for obtaining a construction with low labor costs and materials, in view of which such a design can be effectively used in mass production. With the use of a combined spacer with a radial direction of the gaskets (Fig. 7), their ventilation effect increases and the cooling of the coils 4 is improved. In order to further

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In order to increase the reliability of fastening, the tangential elements 11 by jumpers 17 are combined into a common ring, which, when the rotor rotates, all the combination pads on their fixed radii of installation

For further use. The strength and reliability of fastening the front parts in case of, for example, using a design for high-speed electric machines, the proposed I-shaped grommets 5 can be combined with known types of common retaining ring covering the upper heads of the gaskets of all rotor poles. Structurally, the upper tangential elements 1I (located at the level of the pole tip) can also serve as a place for fixing the balancing rings of the rotor, as well as, in versions, as a place of fixing the balancing weights. In this latter case, the number of holes 19 on them should be large (Fig. 8),

Claims (3)

Formula invented one . A synchronous machine-mounted rotor containing a shaft-mounted armature magnetic conductor, multilayer electric coils at the poles of the magnetic conductor, remote pads located in the frontal parts of the coils between two groups of their layers, and fastening elements of the frontal parts, distinguished by that in order to simplify and improve reliability fastenings of the frontal parts of the coils, remote spacers are made in the form of I-beams, the heads of which form the frontal parts of the coil at both ends along all its layers. 2. A rotor according to claim 1, clause 1 and 2 with the fact that the ends of the heads of the I-beams of the adjacent remote spacers of each frontal part of the pole pole are connected to each other by tangential elements. 3. Rotor on PP. I and 2, that is, the fact that the tangential elements of the spacer of adjacent poles are connected to each other with other jumpers. .U five N . h V at fig.Z phases. 2 physical 12 phi.8.5 sixteen 12 fUS: 6 15 (riel 1e ff ii ia ff Fig.8