RU1829087C - Armature of electric machine and process of its assembly - Google Patents

Abstract

Usage: in electrical engineering, in particular in the design of Korea electric machines and technology for their assembly. SUMMARY OF THE INVENTION: the core of an electric machine comprises a core 1, in the grooves 2 of which is placed a winding 3 having housing insulation 4. The winding is fixed in the groove of the core with a wedge consisting of three longitudinal elements 5 to 7 and placed in the side grooves 8 of the groove having the shape of a dovetail. The middle element 6 of the wedge has the shape of a dovetail and is placed in the grooves 9 of the extreme elements 5 and 7 of the wedge on the sides facing each other. Between the wedge elements 5, 6 and 7 and the winding 3, a channel 10 is formed for the passage of refrigerant. Elastically deformable elements 11 and 12 are laid at the bottom of the groove and in the side grooves 8. The method of assembling the core of an electric machine includes the following operations: assembling a lined core, installing an elastically deformable element at the bottom of the groove; laying the winding in the grooves of the lined core; successive laying from above in each groove of the core of elastically deformable elements and extreme elements of the wedge; the installation of the extreme elements of the wedge in the side grooves of the groove; driving the middle element of the wedge with the end face of the groove into the grooves of the extreme elements of the wedge. 2 sec and 1 C.p. f-ls, 1 ill. 7 P

Description

The invention relates to electrical engineering, in particular to the feed of electrical machines.

The purpose of the invention is to increase reliability,

The drawing shows the measles of an electric machine.

The armature of the machine contains a core 1, in the grooves 2 of which is placed a core 3 winding having a case insulation 4. The winding 3 is fixed in the core groove by a wedge consisting of three longitudinal elements of the wedge 5 - 7 and placed in the side grooves 8 of the upper part of the groove having the shape of a dovetail. The middle element 6 of the wedge also has the shape of a dovetail and is placed in grooves 9 made in the edge elements 5 and 7 of the click on the sides facing each other. Between the elements 5-7 and the winding 3 a channel 10 is formed for the passage of refrigerant. At the bottom of the groove is a carbon-deformable element 11, made, for example, in the form of a leaf spring. The elastodeformable element 11 is placed in the groove in a pre-deformed state so that, as the core winding height decreases due to drying of the insulation during operation, the restoring forces of the elastically deformable element acting from the groove winding compress it to the contact surface with elements 5 and 7 of the wedge, making it impossible to move under the action of centrifugal and dynamic forces caused by the operating conditions of the machine.

In the lateral grooves 8 are placed elastically deformable elements 12, made, for example, in the form of a leaf spring or rubber gasket. This allows, together with the lower elastically deformable element 11, to eliminate the mechanical movement of the winding into the groove under the action of centrifugal and dynamic forces acting on the winding,

In order to increase the reliability of rasklining, the lateral contacting surfaces 9 of the wedge elements 5 and 6, 6 and 7 are made with a slope (for example, 1: 100) along the length of the groove.

The method of assembling the core of an electric machine contains the following basic operations:

assembly of the lined core core;

installation of elastically deformable elements on the bottom of the groove and laying of the winding in the grooves of the core;

installation of elastically deformable elements in the side grooves of the groove;

successive laying from above in each groove of the core of the extreme elements of the wedge;

driving the middle element of the wedge from the end side of the groove into the grooves of the extreme elements of the wedge.

The proposed technical solution improves the reliability of operation and improves the cooling of the electric machine by eliminating mechanical damage to the casing insulation of the core winding and the wedges themselves and forming a channel for the passage of refrigerant.

Claims (3)

1. An anchor of an electric machine containing a lined core, in the grooves of which a winding is laid, is fixed with the help of composite wedges, consisting of three longitudinal elements, distinguished by the fact that, in order to increase reliability, the middle element of the wedge is made in in the form of a dovetail mounted in grooves made in the extreme elements of the wedge on the sides facing one another, a channel for the passage of refrigerant is formed between the extreme elements of the wedge, the winding and the middle element of the wedge. 2. The anchor of the machine according to claim 1, wherein the elastically deformable elements are placed between the extreme elements of the wedge and the side walls of the groove. 3. The method of assembling the core of an electric machine, which consists in laying the windings in the holes of the lined core and installing in the side grooves of the groove of composite wedges, consisting of three longitudinal elements, characterized in that, in order to increase reliability, from above into each groove of the lined core the wedge extreme elements are successively laid and installed in the lateral grooves of the groove, after which the middle element of the wedge is tightly installed in their grooves from the end side of the groove between the extreme elements of the wedge.