SU955389A1 - Ring method electric motor magnetic wedge manufacturing method - Google Patents

Description

The invention relates to the technology of making electrical products, mainly anisotropic magnetic wedges, and can be used in electrical engineering.

A known method of manufacturing electrical products, in particular magnetic wedges, includes displacing the components of the initial mass, dosing it, molding and heat treating the finished product Sch.

A disadvantage of the known technical solution is that the wedges do not have anisotropic properties according to the width and height of the wedge, their magnetic permeability in the indicated directions is approximately the same.

The closest to the present invention is a method for manufacturing a magnetic wedge of an electric machine, comprising mixing iron powder with a binder to form the initial mass, installing a reinforcing base in a mold, for example, in the form of glass fabric, and a soft wire magnet. ki, the initial mass of the mass in the mold-with the message of the mass of vibration, molding and polymerization of the mass 2 J.

However, when making a wedge using this method, its magnetic resistances are approximately the same in height and width of the wedge and, consequently, the magnetic permeability in the direction from the main lines of the field is insufficient, which reduces the energy characteristics.

X

The purpose of the invention is to improve the energy performance due to

tn reduce the magnetic resistance of the wedge in height.

The goal is achieved by installing a magnetically soft wire into the mold of the reinforcing base in the form of individual cylindrical spirals, then winding the spirals into each other in a direction perpendicular to the axis of the spirals with partial overlapping of the turns, and fastening the turns spirals for example

20 installation in the space between the locking spirals, the installation of bonded spirals into the mold is made by arranging the plane of the turns of the spirals across the width of the wedge, and the formation of the mass

25 is carried out simultaneously with the pressing of the wedge in the direction of the width of the wedge and the prepolymerization of the mass.

Claims (2)

In addition, the mass is pre-polymerized for 40-50 minutes at room temperature and the final polymerization lasts 2-2.5 hours at a temperature not exceeding the heat resistance class of the starting material. FIG. 1 shows the scheme of winding spirals; in fig. 2 is a scheme for inserting coils of the spirals; FIG. 3 shows the mode of fastening the coils of the spirals; in fig. 4 - filling the mold with the initial mass; in fig. 5 - scheme for mass formation. The manufacture of the magnetic wedge of an electric machine is carried out in the following sequence. . Separate cylindrical spirals 1 (Fig. 1) are wound from magnetically wired wire onto devices 2, then spirals 3 are inserted into mandrel 3 (Fig. 2) in each other in a direction perpendicular to the axis of the spirals with partial overlapping of the turns. , for example, installation into the space between the spirals of the clamp 4 (Fig. 3), after which the fastened spirals 1 are removed from the mandrel 3.. In the lower part of the mold 5 (Fig. 4) lay a layer of fiberglass b, on which the fastened spirals 1 are placed, the planes of the turns of spirals 1 are positioned across the width of the wedge, and from the mixer 7 the initial mass 8 is placed into the mold when the mass is vibration by vibrator 9 The initial mass 8 is formed by mixing iron powder with a binder, for example, the following composition, parts by weight: Epoxy resin 100 Iron powder 300-380 Hardener. 8-10 Next, the upper layer of pre-impregnated fiberglass fabric 10 is placed on the surface of the spirals, after which the product 11 is pressed with the upper and lower parts of the mold closed and simultaneously pressed to compress the mass with a specific pressure of 6-3 kg / cm in the direction P ( Fig. 5). The above composition is designed for heat resistance class F. For the heat resistance classes H and C, the following compositions can be applied, parts by weight: Press powder consisting of phenylone 100 iron powder 300 Thermosetting material consisting of Diane epoxy resin 80-100 alkylresserdins epoxy resin 10-20 hardener 50-100 boron nitride powder 0.3-0.5 glycerol-3-b iron powder 350-500 Next, in a mold for 40-GzO min, preliminarily, the mass is thickened at room temperature temperature, then finally produced polymerization in cabinets for 2-2.5 hours at a temperature not exceeding the heat resistance class of the starting material. The invention makes it possible to increase the energy characteristics by reducing the wedge magnetic resistance in height. Simultaneously with enhanced strength properties, a magnetic wedge has anisotropy of magnetic properties, which allow to obtain magnetic permeability in the direction of the main lines of the field U 20-25, and in the direction of the diffusion flow - fU 1-2 .. Invention 1. Method of manufacturing a magnetic wedge of an electrical machine comprising mixing iron powder with a binder with the formation of an initial mass, installing a reinforcing base in a mold, for example, in the form of glass fabric and a soft wire magnet, placing the initial mass in a mold adding mass to the vibration, molding and polymerization of the mass, characterized in that, in order to improve the energy characteristics by reducing the magnetic resistance of the wedge in height, before being installed in the press case of the reinforcing base, a soft wire is wound as separate cylindrical spirals, then enter, the turns of the spirals into each other in the direction perpendicular to the axis of the spirals with a partial overlapping of the turns, and fasten the turns of the spirals, for example, by installing into the space between the spirals of the fixture, The bonded helixes were inserted into the mold by positioning the planes of the helix coils across the width of the wedge, and the formation of the mass was performed simultaneously with the pressing of the wedge in the direction of the width of the wedge and the preliminary polymerization of the mass. 2. The method according to claim 1, distinguished-y. and with the fact that the prepolymerization of the mass is carried out for 40-50 min at room temperature, and the final polymerization for 2-2.5 h at a temperature not exceeding the heat resistance class of the starting material. Sources of information taken into account in the examination 1. USSR author's certificate number 321188, cl. H 02 K 15/06, 1970. 2. Certificate of CCCJT No. 493810, cl, H 01 F 1/33, 1972.