CN202798276U

CN202798276U - Exposed motor insulation end cover

Info

Publication number: CN202798276U
Application number: CN201220422493.4U
Authority: CN
Inventors: 杜雄辉; 王雁; 黄晓晨; 华强; 王翼翔; 邹昀海; 华智俭
Original assignee: Wuxi Hwada Motor Co Ltd
Current assignee: Regal Beloit Electrical Wuxi Co ltd
Priority date: 2012-08-24
Filing date: 2012-08-24
Publication date: 2013-03-13
Anticipated expiration: 2022-08-24

Abstract

An exposed motor insulation end cover comprises a bearing inner end cover and a bearing outer end cover. The outer circumference of the bearing outer end cover is in a shape of steps, installing holes communicated with one another are arranged in the two steps, and the bearing inner end cover is sleeved in the installing holes of the bearing outer end cover and fixedly connected with the bearing outer end cover. The exposed motor insulation end cover further comprises a bearing sleeve, a concave portion is arranged at a basin edge of the bearing sleeve, a bearing is sleeved in a middle installing hole of the bearing outer end cover, and the middle installing hole is arranged on one side of the outside of an end face of the bearing outer end cover. A first insulation layer is arranged at a gap position where the concave portion of the bearing sleeve is matched with an inner wall of the bearing outer end cover, and a second insulation layer is arranged between a basin wall except for the concave portion of the bearing sleeve and the inner wall of the bearing outer end cover. The bearing is pressed into the bearing sleeve, and a first insulation gasket is arranged at a matched position of a basin bottom of the bearing sleeve and the inner wall of the bearing outer end cover. A second insulation gasket is arranged among the basin edge of the bearing sleeve, the right side of the bearing and the bearing inner end cover. The exposed motor insulation end cover can prevent axial current from causing electrocorrosion on the bearing, is good in insulation effect, and can effectively reduce bearing temperature.

Description

Exposed insulating end cover for motor

Technical field

The utility model relates to insulating end cover for motor, relates in particular to a kind of exposed insulating end cover for motor.

Background technology

The shaft current that produces during for fear of electric machine rotation consists of destruction to the bearing of motor, need to insulate to motor bearings.In the prior art, the insulating protection measure of taking mainly contains two kinds, i.e. insulation bearing and insulated end cover.Adopt insulation bearing can reach the effect of shaft current protection, but its manufacturing cost is high, and the insulating coating in the insulation bearing is easily damaged in the use of bearing and dismounting; Adopt the technical scheme of insulated end cover many, it substitutes insulation bearing with plain bearing, motor cost is reduced, but existing end cap adopts kind and the quantity of insulating part more, and the insulation property of end cap itself and heat dispersion can't adapt to the instructions for use under the adverse circumstances.

The utility model content

The applicant improves for above-mentioned shortcoming of the prior art, and a kind of exposed insulating end cover for motor is provided, and it can prevent that shaft current from producing galvano-cautery to bearing, and insulation effect is good, and can effectively reduce bearing temperature.

The technical solution of the utility model is as follows:

Exposed insulating end cover for motor, comprise bearing inner end cap and bearing outer end cap, bearing outer end cap outer surface becomes a stairstepping, and two step inside has the installing hole that communicates, and the bearing inner end cap is inserted in the installed inside hole of bearing outer end cap and is affixed with the bearing outer end cap; Also comprise bearing holder (housing, cover), the basin edge of bearing holder (housing, cover) is provided with recess, and bearing holder (housing, cover) is contained in the middle part installing hole of bearing outer end cap, and described middle part mounting hole site is in the outside side of the end face of bearing outer end cap; The recess of described bearing holder (housing, cover) is provided with insulating barrier one with the gap location that the inwall of bearing outer end cap cooperates, and is provided with insulating barrier two between the tub wall beyond the recess of bearing holder (housing, cover) and the inwall of bearing outer end cap; After cooperation was pressed into bearing in the bearing holder (housing, cover), the cooperation place of the basin bottom part of bearing holder (housing, cover) and bearing outer end cap inwall was provided with insulation spacer one; Be provided with insulation spacer two between the inwall of the basin edge of bearing holder (housing, cover), bearing right side and bearing inner end cap.

Its further technical scheme is:

Described insulating barrier one adopts epoxy resin.

Described insulating barrier two adopts H class F insulation paper.

Technique effect of the present utility model:

The utility model substitutes insulation bearing with plain bearing, and cost significantly reduces, by four layers of insulation measures around the installation bearing, so that insulate between bearing and the end cap, thereby the generation of inhibition shaft current; Kind and the quantity of insulating part are few, and parts of the present utility model are less, and life cycle of the product is shortened, and enhance productivity, and install, dismantle all very convenient; Two place's insulating barriers adopt epoxy resin and H class F insulation paper, have improved insulation quality and work efficiency; Bearing is positioned at the outside side of end face of bearing outer end cap, and the exposed design of this kind can effectively reduce bearing temperature.

Description of drawings

Fig. 1 is the assembly structure schematic diagram of the utility model and bearing.

Fig. 2 is the enlarged diagram of A section among Fig. 1.

Fig. 3 is the structural representation of bearing outer end cap of the present utility model.

Fig. 4 is the enlarged diagram of B section among Fig. 3.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described.

See Fig. 1, Fig. 2, Fig. 3, Fig. 4, the utility model comprises bearing inner end cap 1 and bearing outer end cap 2, bearing outer end cap 2 outer surfaces become a stairstepping, two step inside has the installing hole that communicates, and bearing inner end cap 1 is inserted in the installed inside hole of bearing outer end cap 2 and is affixed with bearing outer end cap 2; Also comprise bearing holder (housing, cover) 3, the basin edge of bearing holder (housing, cover) 3 is provided with recess, and bearing holder (housing, cover) 3 is contained in the middle part installing hole of bearing outer end cap 2, and described middle part mounting hole site is in end face 21 outside sides of bearing outer end cap 2; The recess of described bearing holder (housing, cover) 3 is provided with insulating barrier 1 with the gap location that the inwall of bearing outer end cap 2 cooperates, and is provided with insulating barrier 26 between the tub wall beyond the recess of bearing holder (housing, cover) 3 and the inwall of bearing outer end cap 2; After bearing holder (housing, cover) 3 interior cooperations were pressed into bearing 4, the cooperation place of the basin bottom part of bearing holder (housing, cover) 3 and bearing outer end cap 2 inwalls was provided with insulation spacer 1; Be provided with insulation spacer 28 between the inwall of the basin edge of bearing holder (housing, cover) 3, bearing 4 right sides and bearing inner end cap 1.

After bearing 4 and the utility model assembled, be equipped with insulating barrier between the outer ring of bearing 4 and both sides and the utility model, see Fig. 2, by insulating barrier 1, insulating barrier 26, insulation spacer 1 and insulation spacer 28, the shaft current loop that consists of after blocking from electric machine main shaft → bearing 4 → electric motor end cap → electric machine stand to ground connection, thereby suppress the generation of shaft current, prevent that shaft current to the galvano-cautery of bearing 4, effectively protecting bearing 4; Insulating material kind of the present utility model and quantity are 3 kinds, 4, greatly reduce the use of insulating material; Insulating barrier 1, insulating barrier 26 adopt respectively epoxy resin and H class F insulation paper, have improved insulation quality and work efficiency, and material environment friendly; Bearing 4 is positioned at end face 21 outside sides of bearing outer end cap 2, near the relatively low external environment condition of temperature, the exposed design of this kind, can effectively reduce the temperature of bearing 4.

More than describing is to explanation of the present utility model, is not the restriction to utility model, and the utility model limited range within protection range of the present utility model, can be done any type of modification referring to claim.

Claims

1. exposed insulating end cover for motor, comprise bearing inner end cap (1) and bearing outer end cap (2), it is characterized in that: bearing outer end cap (2) outer surface becomes a stairstepping, two step inside has the installing hole that communicates, and bearing inner end cap (1) is inserted in the installed inside hole of bearing outer end cap (2) and is affixed with bearing outer end cap (2); Also comprise bearing holder (housing, cover) (3), the basin edge of bearing holder (housing, cover) (3) is provided with recess, and bearing holder (housing, cover) (3) is contained in the middle part installing hole of bearing outer end cap (2), and described middle part mounting hole site is in the outside side of end face (21) of bearing outer end cap (2); The recess of described bearing holder (housing, cover) (3) is provided with insulating barrier one (5) with the gap location that the inwall of bearing outer end cap (2) cooperates, and is provided with insulating barrier two (6) between the tub wall beyond the recess of bearing holder (housing, cover) (3) and the inwall of bearing outer end cap (2); After cooperation was pressed into bearing (4) in the bearing holder (housing, cover) (3), the cooperation place of the basin bottom part of bearing holder (housing, cover) (3) and bearing outer end cap (2) inwall was provided with insulation spacer one (7); Be provided with insulation spacer two (8) between the inwall of the basin edge of bearing holder (housing, cover) (3), bearing (4) right side and bearing inner end cap (1).

2. by exposed insulating end cover for motor claimed in claim 1, it is characterized in that: described insulating barrier one (5) adopts epoxy resin.

3. by exposed insulating end cover for motor claimed in claim 1, it is characterized in that: described axle insulating barrier two (6) adopts H class F insulation paper.