SU1686548A1 - Commutator of electric machine - Google Patents

Abstract

The invention relates to electrical engineering, in particular to collectors on plastics of electric machines of direct current. The purpose of the invention is to increase the strength and switching capacity, as well as to save the conductive material. The collector of an electrical machine contains conductive lamellae 1, plastic interlaminar insulation 2 and insulating body 3, which form a permanent connection with conductive lamellae, on the side surfaces The lamellae on both sides are grooved in the axial direction of the collector. Radially grooved across the entire height of the collector plate on the lateral surfaces of the lamella. 4 il. f. ... O; CO O- SL 4 00 wir

Description

The invention relates to electrical engineering, in particular to collectors on plastic of direct current electric machines,

The purpose of the invention is to increase the strength and improve the switching conditions, as well as to save the conductive material.

Figure 1 shows the proposed collector; Fig. 2 shows a conductive common lamella with grooves on the side edges; on fig.Z - section A - A in figure 2; figure 4 - node I in figure 2.

The electrical machine collector contains current-conducting lamellae 1. plastic housing 2 and interlaminar insulation 3. On the surfaces of the side faces 4 and 5 of each lamella 1, axial 6 and radial 7 corrugations are made, filled with insulation 3, forming with plastic housing 2 and lamellae 1 one-piece connection. Moreover, the grooves 6 and 7 sylpol not over the entire height of the collector plate in such a way that on its working surface 0 the sides 9 and 10 are made in the form of a broken line 11, and the height of the lamella is chosen equal to the value of allowable wear and corresponds to the required electrical conductivity.

When the collector is rotated in a working machine, the one-piece connection body 2 - interlaminary insulation 3 - lamella 1 with corrugations on the side faces keeps conductive lameg. 1 from movement in axial and radial directions.

In the proposed collector grooves in the axial and radial directions, those. Mesh grooves are made along the entire height of the working part of the lateral sides of the plate. This eliminates the axial movement of the collector plates during operation, leading to cracking of the interlame insulation. Mesh corrugation on the side surfaces of the patch allows to increase the area of contact with interlaminary isopia by 1, 2 times and increase adhesion strength, ib and significantly (about 1.3 - 1.5 times) increase the cross-section of interlaminar gap between the plates It has a width of the order of 0.8–1 mm, which makes it possible to reduce the stress in the cross section of the plastic lintel under the action of centrifugal cm and to increase the strength and durability of the collector. In addition, the implementation of mesh corrugation across the entire surface area of the side plates at the height of its working hour HI allows you to refuse the additional fastening part, since the role of the fastener elements is formed by

over the area of the sides of the plate, protrusions of the conductive material and depressions filled with insulating material. This allows reducing the plate height and its mass, reducing the load on the collector under the action of centrifugal forces, and reducing the consumption of conductive material.

The profile of the working surfaces of the plates is a consequence of the performance of mesh grooves on their sides. This provides, besides increasing the strength of the collector, also a gradual decrease in the contact resistance of the escaping and incident edges of the grid and a smooth change in the arc current, i.e. leads to improved switching conditions

In the proposed collector, the mesh grooves, performed on the sides of the collector plate along the height of its working part, make it possible to minimize the height of the plates.

In this case, the fastening elements in the form of mesh protrusions of the conductive material of the plate enter the interlame insulation of the plastic-compressed collector, and the mesh cavities on the lateral sides of the plates are filled with the material of interlaminar insulation. The role of fasteners is performed by mesh grooves of the sides of the working part of the plate without the use of additional fasteners along the height of the plate.

The advanced design of the collector allows the lamellae to be securely attached to the insulating body and to prevent their mutual movement. Such a structure does not require a special fastening element in the lamppost, the presence of which leads to a significant increase in the consumption of expensive conductive material. In addition, in the proposed collector design 3d, the elimination of the fastener decreases the height and lamella mass, therefore, the dynamic loads acting on the collector decrease and its strength increases.

Claims (1)

Formula and inventions An electrical machine collector containing current-conducting lamellae, plastic interlaminar insulation, and an insulating body forming a permanent connection with the conductor lamellae, and corrugation is made on the side surfaces of each lamella, in order to increase strength, eco516N654Y l6 The characteristics of conductive material and the improved lateral surfaces of the lamella are fulfilled by the switching conditions, grooved over its entire height and has a mesh shape. a Ј 9 / vwwVvvv VvVV4 / VVWv vVVV AA / vyv yu yu to / l eight Fi.Z , 7 -eleven 77 FIG.