CN202586595U - Shaft current preventing structure used for large or medium-sized motor sliding bearing - Google Patents

Abstract

The utility model provides a shaft current preventing structure used for a large or medium-sized motor sliding bearing. The shaft current preventing structure includes a bearing pedestal. The bearing pedestal is sprayed with a Teflon insulating layer on a cooperation part between the bearing pedestal and a bearing bush. The shaft current preventing structure has a simple structure, can effectively prevent the shaft current, and at same time, can guarantee the installation precision of the bearing bush.

Description

A kind of anti-shaft current structure that is used for the large and middle size motor sliding bearing

Technical field

The utility model relates to a kind of insulation system, particularly a kind of anti-shaft current structure that is used for the large and middle size motor sliding bearing.

Background technology

Now, in the common electric machine structural design, the above large and middle size motor of general seat No. H500 all adopts sliding bearing; Owing to adopted erose stator punching or adopted fan-shaped assembly sheet; Perhaps, can produce bigger shaft current because mismachining tolerance causes electromagnetic circuit asymmetric easily; Shaft current can be damaged the bearing shell babbit, reduces bearing useful life.The sliding bearing structure that adopts now, all on bearing pedestal, bearing pedestal and bearing shell cooperation place are stained with the insulating barrier of one deck polytetrafluoroethylene, are used to block shaft current, protect bearing shell.But in use, the polytetrafluoroethylene adhesion coating comes off easily and damages, and can not effectively prevent shaft current, and influences the installation accuracy of bearing shell.

The utility model content

For the above-mentioned technical problem that the anti-shaft current structure that solves existing large and middle size motor sliding bearing exists, the utility model provides a kind of reliability the high anti-shaft current structure that is used for the large and middle size motor sliding bearing.

The technical scheme that the utility model solves the problems of the technologies described above is: comprise bearing pedestal, bearing pedestal top chock and bearing shell cooperation place are coated with the Teflon insulating barrier.

The beneficial effect of the utility model is: the utility model is simple in structure, and the Teflon insulating barrier is sprayed on the bearing pedestal, and insulating barrier combines with bearing pedestal firmly, is difficult for impairedly, can effectively prevent shaft current, can guarantee the installation accuracy of bearing shell simultaneously.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

As shown in Figure 1, the utility model comprises bearing pedestal 1, and bearing pedestal 1 top chock 1 is coated with Teflon insulating barrier 2 with bearing shell 3 cooperation places.

When electric motor starting, machine shaft 5 rotations, owing to reasons such as magnetic imbalance produce shaft voltage, Teflon insulating barrier 2 has been blocked the current path of shaft current through bearing shell 2 and bearing pedestal 1, has prevented the generation of shaft current, has protected the bearing metal working face 4 of bearing shell 3.

Claims (1)

1. an anti-shaft current structure that is used for the large and middle size motor sliding bearing comprises bearing pedestal, and it is characterized in that: bearing pedestal top chock and bearing shell cooperation place are coated with the Teflon insulating barrier.

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