SU1721710A1 - D c electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to improve the electromagnetic characteristics of the machine by simplifying the adjustment of the position of the poles. The direct current electric machine contains a magnetic core 1 with a pole 2 and pole cores 3. The cores are pressed against the supporting surfaces. A guide cassette 5 is located between the pole and the cores of the poles. limiters 7 are located, which abut rmo 2. There are groups of gaskets 8 installed in the cassette. At the end of the guide cassette, there are limiters for the axial movement of the gaskets. 1 hp f-ly, 3 ill.

Description

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The invention relates to electrical engineering, in particular to large electrical machines of direct current.

The purpose of the invention is to improve the electromagnetic characteristics of the machine by simplifying the adjustment of the position of the poles.

FIG. 1 shows a car, a general view; FIG. 2 shows the displacement of the core in the tangential direction; in fig. 3 - cassette guide.

The electric machine of direct current (see Figs. 1 and 2) contains a magnetic core 1 having a pole 2 and cores of poles 3, the cores being pressed to the chamber along two supporting surfaces 4 angled to each other. the shape of the core surface facing the rom and is formed by the plate 6 adjacent to the supporting surfaces and protruding behind them

provided with restrictor 7 located on the sides of the cassette, abutting on the PMO. For each supporting surface of the core, separate groups of gaskets are installed in the cassette 8. The height of the plate stops (see Fig. 3) in its free state is greater than the maximum possible thickness of the group of gaskets. Due to the protrusion of the plate beyond the supporting surfaces, its edges can be bent in case of the required thickness of the gasket set (see Fig. 2), but the restraints always abut against the yoke, excluding the spacers leaving the cassette outside. In turn, both the maximum thickness and the minimum thickness of the set are determined by the necessary range of adjustments in both the radial and tangential directions of the core. There must be both an increase in the thickness of the gasket set and a reduction. it

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it is provided together with all the agreed means with the presence of a gap 9 guaranteed in the nominal position between the core and the canal along the radial axis of the core. The tangential displacement of the core (axis A) relative to the axis B of the core is carried out by transferring shims from one group to another. In addition to the specified components, the plate may be provided with a limiter 10 axial displacement of gaskets. The yoke is mounted vertically (to the position in which the images shown in Figs. 1 and 2 are plan view). The cores are suspended on bolts inserted into the holes of the chassis along the axis B (bolts and holes are not shown). The plate is inserted so that the bolts are inside the groove 11 (see Fig. 3). The bottom of the groove 12 rests on the top bolt. Gaskets are installed in the cassette up to the stops 10, necessary position adjustments are made and bolts are tightened. Obtaining a high accuracy of the installation of the symmetrical arrangement of the poles is especially important in a DC machine. This is necessary to ensure the normal switching of the machine and to avoid unacceptable sparking of the brushes, as well as to reduce stray currents, which increase losses and heat. In this way, the electromagnetic characteristics are improved.

1

Thus, the invention extends the possibilities of using a highly efficient magnetic circuit design for machines with difficult switching conditions in stressful operating modes (excavators, rolling mills, drilling rigs, etc.).

Claims (2)

1.Electrical DC machine, containing rm of a multifaceted shape and pole cores, the ends of which are adjacent to the supporting surfaces of the rack at an angle to each other, in order to improve the electromagnetic characteristics by simplifying the positioning of the poles between each a core cassette is mounted by the core of the pole and the arm, the shape of the surface of the core is turned towards the side of the core, on the side edges of which there are limiters in contact with the arm, in the cartridge Ovens of groups of gaskets adjacent to the supporting surfaces of the frame. 2. A machine, characterized in that each guide cassette is provided with axial movement restriction of the gaskets. sixteen FIG. one 7 Fig.Z