RU2380812C1 - Device to assemble rotor and stator winding - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises housing 1 tetrahedron-like to part 2 and lower part 3 representing casing cut on its both sides, both said parts being separated by shoulder 4. Aforesaid housing has complex-shape inner space 5. The latter houses bolt 6 with spherical end face 7 interacting with inner surface 8 of bearing 9 representing a hollow bush. Additionally, proposed device incorporates frame 10 to interact, by its inner surface, with the housing outer surface and, by its outer surface, with the sides of groove 12 of the core.

EFFECT: ease of maintenance and mounting.

7 cl, 4 dwg

Description

The invention relates to devices for the manufacture of windings, in particular for laying the conductors of the winding inside the open grooves of the rotors and stators of mainly power electrical machines.

A device is known for pressing winding conductors into the core of a motor rotor containing a plate with a thickness corresponding to the size of the groove (Pat. DE No. 19521669, publ. 04.1996). The bottom edge of the plate has cutouts at the ends. The lateral surfaces of the plate are equipped with a series of vertical impact stamps with active lower ends that interact with the upper edges of the grooves. Conductors located in the groove, due to the vertical displacement of the tool inside the groove, are compressed by the active lower ends of the shock stamps, acquiring an elliptical cross-section. After the wires are compressed, the shock stamps perform point compression of the upper edges of the grooves, forming an internal protrusion, carefully fixing the extreme conductor.

In the windings of rotors or stators of powerful electric machines, the length of the core and, consequently, the groove is much greater than the length of the known device, the coils are equipped with ventilation channels, and the conductors of the coils are flat. In this case, the conductors are fixed with elastic gaskets and grooved wedges of a complex profile to prevent the conductors from slipping out under the influence of centrifugal forces. In addition, the grooves has a complex profile in the upper part, providing tight contact of its inner surfaces with the outer surfaces of the groove wedges.

When laying the conductors of the winding in the grooves of the core of such machines using known devices, shock loads are applied, which leads to displacement of the conductors and a violation of the ventilation channels, as well as to deformation and rupture of the conductors. In addition, the working surface of the known device is limited by the width of the slot of the groove, which can also lead to damage to the conductors.

The technical result of the proposed solution is to increase the manufacturability and quality of installation of the windings of rotors and stators by reducing the complexity of laying conductors and reliable fixation of wedges in the grooves of the core.

The technical result is achieved by the fact that in the device for mounting the windings of rotors and stators, comprising a housing and elements with a working surface, it is proposed that the housing is made of two parts of different shapes with a through internal cavity of a complex profile, a bolt is placed in the cavity interacting with its end face with the inner surface of the heel , the heel is made in the form of a hollow sleeve connected to the bolt, in addition, the device is additionally equipped with a frame that interacts with the walls of the groove, and the inner square surface with the outer surface of the body, the upper part of the body is made in the form of a tetrahedron, and the lower part of the body is in the form of a cone cut off on both sides and the two parts are separated by a shoulder located on opposite sides of the body, position the heel in the cavity of the lower part of the body and connect to the threaded part of the bolt whose end has a spherical shape.

Figure 1 shows the device for mounting the windings of rotors and stators in the groove of the core in the working position, side view; figure 2 is the same, a section along aa; figure 3 is a device for mounting the winding of the rotor and stator in the groove of the core in the initial position, side view; figure 4 is the same, a section along BB.

The device for mounting the windings of rotors and stators contains a housing 1, consisting of an upper part 2 in the form of a tetrahedron and a lower part 3 in the form of a cone cut from two sides, separated by a shoulder 4. In addition, the housing 1 has an internal cavity 5 of a complex profile. In the cavity 5, there is a bolt 6 with a spherical end 7 interacting with the inner surface 8 of the heel 9, made in the form of a hollow sleeve. The heel 9 is fastened with a bolt 6 using a threaded connection. The device for mounting the rotor and stator windings is additionally provided with a frame 10 interacting with its inner surface with the outer surface of the housing 1, and the outer surface 11 with the sides of the core groove 12.

A device for mounting the windings of rotors and stators works as follows.

In the initial position, the device is inserted into the groove 12 of the core at an arbitrary distance from the edge of the groove. The lower part 3 of the housing 1 is located in the upper part of the groove 12. The shape of the lower part 3 of the housing 1 in the form of a cone cut from both sides allows the device to freely fit and move along the length of the groove 12, because the cut cone of the housing 1 is oriented along the groove 12, and the frame 10 is in the upper position.

When the device is in the working position, the frame 10 together with the housing 1 is rotated 90 °. At the same time, the surface of the cone of the lower part 3 of the casing 1 cut off on two sides contacts the inclined surfaces 13 (dovetail) of the upper part of the groove 12. The frame 10 is lowered into the groove 12 along the cut-off sides of the cone of the lower part 3 of the casing 1 against the shoulder 4 and surfaces 11 fixes the device in the groove, keeping it from radial displacement.

When crimping the groove part of the coil, the coils 14 are fixed in the grooves 12 due to the action of the heel 9, with the inner surface 8 of which interacts with the spherical end 7 of the bolt 6, moving down along the threaded connection when turning the head of the bolt 6. In this case, the outer surface of the lower part 3 of the housing 1 is in contact with the surfaces 13 of the groove 12 with force, which further fixes the device.

When installing elastic gaskets 15 under the wedge (not shown, the wedge profile corresponds to the shape of the upper part of the groove, for example, “dovetail”), the device is transferred to its original position. After placing the gaskets 15 in the grooves 12 without violating the geometry of the axial ventilation ducts (not shown in the figure), the gaskets 15 are pressed using a similar operation of the device.

When the groove part of the winding is jammed, which occurs simultaneously with the installation of elastic gaskets, the device is placed in front of the wedge and presses the elastic gasket 15 before the wedge moving along the groove 12, reducing the force of its movement, which prevents longitudinal displacement of the elastic gaskets and, as a result, damage to the ventilation ducts of the winding . After laying the wedge, the device moves to the next section of the groove and the wedging occurs in a similar way.

The proposed device for mounting the windings of rotors and stators significantly increases the manufacturability of installation due to the mechanization of securing the coils, laying elastic gaskets and wedges in the grooves of the core, and also improves the quality of the winding itself by eliminating unwanted displacements and damage to the mounted winding elements.

Claims (7)

1. A device for mounting a winding of rotors and stators, comprising a housing and elements with a working surface, characterized in that the housing consists of two parts of different shapes and has a through internal cavity of a complex profile, in which there is a bolt interacting with its end face with the inner surface of the heel in in the form of a hollow sleeve connected to a bolt, in addition, the device is additionally equipped with a frame interacting with the walls of the groove. 2. A device for mounting a winding of rotors and stators according to claim 1, characterized in that the upper part of the housing is made in the form of a tetrahedron. 3. The device for mounting the windings of rotors and stators according to claim 1, characterized in that the lower part of the housing is made in the form of a cone cut from two sides. 4. A device for mounting a winding of rotors and stators according to claim 1, characterized in that the parts of the housing are separated by a shoulder located on opposite sides of the housing. 5. The device for mounting the winding of rotors and stators according to claim 1, characterized in that the heel is located in the cavity of the lower part of the housing and is connected to the threaded part of the bolt. 6. A device for mounting a winding of rotors and stators according to claim 1, characterized in that the end face interacting with the inner surface of the heel has a spherical shape. 7. A device for mounting a winding of rotors and stators according to claim 1, characterized in that the frame interacts with its inner square surface with the outer surface of the housing.

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