SU1275662A1 - Method of manufacturing manetic circuits of poles of electric machines - Google Patents

Abstract

The invention relates to the technology of manufacturing elements of magnetic circuits of electrical machines, especially magnetic cores of poles of electrical machines of direct current of low and medium power. The purpose of the invention is to improve the magnetic properties. The body of the pole is made in the form of a box of sheet steel, then the body is filled with magnetic elements obtained by grinding the stamping waste of electrical steel. The filling process is combined with the orientation of the elements by applying vibration at an angle to the walls of the housing. After performing pressure testing operations; 250-350 kg / cm and calibration of the body of the magnetic circuit is performed & fastening of the magnetic elements by impregnation with a magnetic melt (L of cast iron at 1100-1150 0, and after the removal of the melt, fix the cover on the body. 6 Il.

Description

The invention relates to electrical engineering, and in particular to a technology for manufacturing elements of magnetic circuits of electric machines, mainly magnetic circuits of poles of electric DC machines of small and medium power.

The purpose of the invention is the improvement of the magnetic properties of the magnetic poles.

Fig. I shows the pole of an electric machine; in FIG. 2 - housing. luce; in Fig.Z - the process of filling the housing; figure 4 - pressure testing of the housing; figure 5 - calibration of the housing in the mold; figure 6 - centrifugal impregnation.

The manufacturing process is as follows ..

For pole I, the magnetic elements 2 are made by grinding the stamping wastes of electrical steel, then they are mixed.

The housing 3 of the pole I is in the form of a box of sheet steel. Magnetic-conductive elements 2 from the hopper-dispenser 4 fill the space of the housing 3. At the same time, one wall and a cover are removed from the housing 3. To increase the fill factor and increase the magnetic properties of the core, the magnetic elements 2. orient in one plane by installing the housing 3 on the vibration unit 5 at an angle to the horizontal plane. After the orientation of the elements 2, they are pre-bonded in the housing 3, installing the locking wall 6 (figure 4). Then the elements are pressed, for example, with the help of pneumatic. cylinder 7 with a pressure of 250-350 kg / cm, then the wall 6 is welded to the body 3 and the resulting package 8 is calibrated in the mold 9 (Fig. 5). Then fasten the package 8, install it in the cylinder I0 of a centrifugal injection machine II (Fig.6) and impregnate it in the centrifugal force field with a melt 12 of magnetic cast iron.

• The molten iron should have a temperature of 1100-ll50 ° C. At this temperature, under the action of centrifugal force, all the voids between the elements 2 are filled, which, after the melt has solidified, are fastened into a monolith.

On the housing 3 install the cover 13 and weld it (figure 2). Shoe I4 is welded to the casing of the magnetic circuit (Fig. I).

As an example, a method of manufacturing a magnetic circuit of the pole contains a method of manufacturing a magnetic. wires of an additional pole of an electric machine of a direct current of type 2P. The dimensions of the pole are 150x90x40 mm. As stamping waste, cuttings from the slots of the anchor plates are used. The average size of the felling is 35x12x0.65 mm. Electrical steel grade 2013. Cuttings are crushed to sizes 14x2.5x0.65 mm (60% of the total mass) and 8x1.5x0.65 mm (40% of the total mass). Then, the obtained elements 2 are uniformly mixed and filled from the hopper into the housing 3 with the required dimensions, preliminarily made of steel sheet material, which is mounted on the vibration unit 5. After the elements 2 are oriented, they are pressed and the resulting package 8 is calibrated, the latter is poured with molten magnetic cast iron with LOC C After curing this melt, the bag 8 is removed from the cylinder 10.

Claims (1)

The invention relates to electrical engineering, in particular, to the manufacturing technology of the elements of magnetic circuits of electrical machines, preferably magnetic circuits of the poles of electrical machines of direct current of small and medium mosh. The purpose of the invention is to improve the magnetic properties of the magnetic cores of the poles. Figure 1 shows the pole of an electric machine; figure 2 - housing Luce; FIG. 3 shows the process of filling the case; figure 4 - crimp housing; figure 5 - calibration of the housing in the mold; Fig. 6 shows the centrifugal impregnation process. The manufacturing process is carried out as follows. For the pole 1, magnesium conductors 2 are made by grinding the stamping waste of electrical steel, then they are mixed. The housing 3 of the poles 1 is made in the form of a sheet steel box. The magnetically conductive elements 2 from the metering hopper 4 fill the space of the housing 3. With this, one wall and a wall are removed from the housing 3. To increase the filling ratio and increase the magnetic properties of the core, the magnetic core elements 2. Oriented in the same plane by installing the housing 3 on the vibration unit 5 at an angle to the horizontal plane. After the orientation of the elements 2, they are pre-fastened in the housing 3, the locking wall 6 is installed (figure 4). Then opressovyvayut elements, for example, using pne. the cylinder 7 with a pressure of 250-350 kg / cm, then the wall 6 is welded to the housing 3 and the resulting package 8 is calibrated in the mold 9 (figure 5). Then the package 8 is fastened, installed in the cylinder 10 of the centrifugal injection molding machine 11 (FIG. 6) and impregnated in the field of the centrifugal force with the molten magnetic iron 12. The iron melt should have a temperature of 1100-II50 ° C. At this temperature, under the action of centrifugal force, all the p-seals between elements 2 are filled, which, after the melt has cured, are fastened to the monolith. On the housing 3 install the cover 13 and weld it (figure 2). The boot 14 is welded to the housing of the magnetic conductor (figure 1). As an example of a method of manufacturing a magnetic circuit, a pole includes a method of manufacturing a magnetic one. wires of an additional pole of an electric machine of direct current of type 2P. The dimensions of the pole are 150x90x40 mm. As a stamping waste, cuttings are made from the grooves of the core plates. The average size of the cutting 35x12x0,65 mm. Electrical steel brand 2013. Cuttings crushed to the size of 14x2,5x0,65 mm (60% of the total mass) and 8x1,5x0,65 mm (40% of the total mass). Then, the obtained elements 2 are uniformly mixed and poured from the hopper into the pre-made of steel sheet material case 3 with the required dimensions, which is installed on the vibration unit 5. After the orientation of the elements 2 - pressing them and calibrating the 8, the resulting layers are cast with molten magnetic iron at OS C. After curing 8, a cylinder package 10 is extracted from this melt. Claims of the invention. A method for manufacturing magnetic circuits of electric machine poles, including manufacturing magnetic circuits x elements by grinding electrical steel forging waste, orienting the magnetic elements, pressing them and fastening, characterized in that, in order to improve the magnetic properties, the pole body is made in the form of a sheet steel box, the body is filled without one of the walls and the core with magnetic conductor elements, the orientation of the magnetic elements is made by imposing vibration on the body at an angle to its walls when Kopliyca is filled with magnetic elements, before pressing the body was installed the wall is pressed, pressure testing is carried out in the direction perpendicular to this wall, with a pressure of 250,350 kg / cm, then the wall is fixed to the body, the body is calibrated in a mold, the magnetic core elements are bonded by impregnating magnetic iron with molten iron at 1100 1150 ° C, and after 12756624 Melt solidification, fix the roof to the yd d case. .JrfJ 2 Fig / same Vibrator Fig.Z FIG. five