SU1495921A1 - Bearing assembly of electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to reduce the radical dimensions. An electric machine bearing unit contains 9, 10 main and 13, 14 reserve bearings, between which intermediate sleeves 11 and 12 are installed. Due to the fact that intermediate sleeves are made stepped with different diameters for mounting backup and main bearings, the goal is achieved. 3 il.

Description

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The invention relates to electric machines, in particular to small-sized electric bearings with bearings on roller bearings,

The purpose of the invention is to reduce the radial dimensions.

Fig, 1 shows a support with a stepped bushing and one reserve ball bearing; in fig. 2 — support with two sleeves and two reserve ball-bearings; Fig. 3 shows a support structure in which the main and backup ball bearings are the same.

The electric machine comprises a housing to which, for example, two roofs are fastened by a rolling method; 2 and 3, the housing 1 is fixed; the stator 4 with the winding 5, the rotor 6 with the curtain I of the stator 4 is located I rings 7, the rotor 6 is fixed on your-; lu 8, which is mounted on two main ball bearings 9 and 10, the outer rings of which through nrome-: slider sleeves 11 and 12 are scrapped with the inner rings of the reserve ball bearings 13 and 14. For example, to obtain a permanent joint, I, none of the ends of the sleeves 11 and 12.: flared. The outer and inner rings of the main 9 and 10 and additional 13 and 14 ball bearings I are fixed in the covers 2 and 3 with the help of I spring rings 15 and 16 "To reduce the radial dimensions, the intermediate sleeves are filled stepwise in the axial direction and mounted on the rings of ball bearings with spring rings 15 and 16. The diameter of the sleeve surface for fitting the inner ring of the backup bearing 13 is smaller than the diameter of the surface of the sleeve for fitting the outer ring of the main bearing 9. Number of standby ball bearings s in the electric machine may be more than one is selected in each bearing unit. For example, in FIG. Figure 2 shows a variant of the machine support with two reserve ball bearings 13 and 17, with two sleeves 11. The locking of the backup needle syringes 13 and 17 on the sleeves 11 is made with spring rings. 15 and 16. One embodiment of the support with one backup ball-digit 14 is the design in FIG. 3, in which the sleeve 11 is done} {a step, and the main

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10 and reserve 14 ball bearings are the same o

Electric machine works as follows.

When the supply voltage is applied to the winding 5 of the stator 4, the rotor 6 s k.z,. rings begins to rotate. The main 9 and 10 and the reserve 14 and 13 ball bearings are fixed-comfort rotating rotor in axial and radial directions. The outer rings of the main ball bearings 9 and 10, together with the intermediate sleeves 11 and 12, rotate slowly in the same direction as the inner rings of the main ball bearings 9 and 10. Therefore, the inner rings of the reserve ball bearings 13 and 14 rotate slower than the inner rings main ball bearings 9 and 10. When a ball fails, for example, the balls are jammed, the separator is destroyed, etc., any of the ball bearings 9, 10, 13 or 14, due to bushings 11 or 12, the shaft 8 of the machine continues to rotate on the remaining ball bearings the dog-studs that function on the machine fails to occur, even if either two main or two reserve ball bearings are out of operation, because each of the ball bearings automatically (thanks to sleeves 11 and 12) duplicates one another ,,

The present invention allows to reduce the radial dimensions.

machines, which is important, for example, for submersible electric machines, which have radial dimensions limitations

Claims (1)

Invention Formula I. An electrical machine bearing unit containing main and backup bearings and intermediate bushings mounted on the shaft, located between the outer rings of the main and inner rings of the backup bearings, characterized in that, in order to reduce the radial dimensions, the main and backup bearings are offset from each other in the axial direction, intermediate sleeves are made stepwise and the diameter of the surface of the sleeve for installation inside A51A959216 Render the backup ring under the mounting of the outer ring ka MeHbFje surface diameter of the sleeve-main bearing. 15 fie.g P.15 YU Phie.