CN201956786U

CN201956786U - Insulating end cover for motor

Info

Publication number: CN201956786U
Application number: CN201120024037XU
Authority: CN
Inventors: 王太历
Original assignee: Xiangtan Shitong Electrical Co Ltd
Current assignee: HUNAN SHIYOU ELECTRIC PUBLIC CO., LTD.
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-08-31
Anticipated expiration: 2021-01-25

Abstract

The utility model discloses an insulating end cover for a motor, which comprises a motor rotating shaft and a bearing, wherein the bearing is fixedly connected to the rotating shaft and is formed by radially sheathing an inner shaft sleeve and an inner end cover and axially penetrating an outer bearing cover, the inner shaft sleeve and an inner bearing cover through bolts and locking; an insulating bush is arranged between the inner shaft sleeve and the end cover; an insulating ring is arranged at the end part of the matched part of the inner shaft sleeve, the insulating bush and the end cover between the outer bearing cover and the inner bearing cover; the defects that the bearing of the end cover for the traditional motor is easy to generate electric corrosion, the number of insulating pieces is great, work procedures for machining are complex, and the insulating end cover has long period, high production cost, poor operation reliability, long service life and the like, is difficult to maintain faults and cannot adapt to a wind-driven generator are overcome; in addition, the problem that the bearing generates axial current when a circuit between the inner and outer bearing covers and the motor rotating shaft is connected is solved; and the insulating end cover is suitable for sealing and insulating bearings of various motor rotating shafts and is especially suitable for the wind-driven generator requiring reliability in operation and long service life and alternating current/direct current motor products for executing special tasks and purposes.

Description

The electrical machine insulation end cap

Technical field

The utility model relates to a kind of electrical machine insulation end cap, especially a kind of electrical machine insulation end cap through the outwards junction sealing of internal axle sleeve footpath, insulation.

Background technology

Existing motor end cap mainly contains three kinds of structures, and existing division is as follows: the end cap that nonisulated bearing is housed in the ⑴ axle sleeve is a metal end.This kind end cap does not possess insulation function, can't block the shaft current that produces in the motor operation course, and when motor produced shaft current, galvano-cautery will take place bearing, thereby makes the useful life of motor bearings shorter, and the motor reliability of operation is lower.⑵ the end cap that insulation bearing is housed in the axle sleeve is a metal end.This kind end cap body does not possess insulation function, be after relying on the interior equipped insulation bearing of axle sleeve of end cap, because the insulating barrier of bearing itself has anti-shaft current function, can block the shaft current that motor produces in running, stops the galvano-cautery of shaft current to motor bearings.But insulation bearing needs import, costs an arm and a leg, and is subjected to the restriction of International Factors, thereby the manufacturing cost of motor is obviously improved, and the market price is higher, often only adopts having on the motor product of specific (special) requirements.⑶ have the motor end cap now, its structure is complicated, the kind and the quantity of the insulating part that adopts are more, reach 4 kinds totally 11, dead ring wherein also need increase bolt hole in addition, so increased more machine work preface, thereby the influencing factor of product insulation property is increased, cause its fault point will be at double or the increasing of 10 times of amounts; When motor any one insulating part in the long-time running process goes wrong, whole insulation system was lost efficacy, and its fault is difficult to search and get rid of, so, the insulated end cover of this kind structure should not use on the motor of wind-driven generator or execution special duty, and the manufacturing process cycle is longer, and work efficiency is lower, and production cost is higher.

Summary of the invention

At above-mentioned situation, the purpose of this utility model provides a kind of simple in structure, compact, production technology is simple and easy, and production cost reduces, the production efficiency height, good product quality, insulation property are good, the mechanical strength height, and resistance to ag(e)ing is good, reliable, long service life and the electrical machine insulation end cap of being convenient to safeguard.

To achieve these goals, a kind of electrical machine insulation end cap, it comprises machine shaft, be fixed on the bearing on the machine shaft, bearing is suit internal axle sleeve, end cap and form to placing outer bearing cover, internal axle sleeve, inside cap locking through bolt shaft radially, between internal axle sleeve, end cap insulating case is set, the end of the internal axle sleeve between outer bearing cover and inside cap, insulating case, end cap cooperation place is provided with dead ring.

For implementation structure, effect optimization, its further step is.

It between insulating case and the end cap interference fit.

Insulating case is a composite insulation layer.

The utility model adopts and comprises machine shaft, be fixed on the bearing on the machine shaft, bearing is the suit internal axle sleeve radially, end cap and through bolt shaft to placing outer bearing cover, internal axle sleeve, inside cap locking forms, at internal axle sleeve, insulating case is set between the end cap, internal axle sleeve between outer bearing cover and inside cap, insulating case, the end of end cap cooperation place is provided with the technical scheme of dead ring, it has overcome existing motor and has existed bearing that galvano-cautery takes place easily with end cap, the kind and the quantity of insulating part are more, the machine work preface is numerous and diverse, cycle is long, work efficiency is low, the production cost height, the fault point is many, trouble shoot, eliminating and difficult in maintenance, operational reliability is poor, and useful life is short, can't adapt to wind-driven generator or carry out special duty, defective such as use on the motor of purposes, and it has solved interior, outer bearing cover is when circuit between machine shaft communicates, and bearing can produce the difficult problem of shaft current.

The beneficial effect that the utility model is produced compared to existing technology:

(I) the utility model electrical machine insulation end cover structure is simple, compact, the kind of insulating part and quantity by original 4 kinds totally 11 be reduced to 2 kinds totally 3;

The parts of (II) the utility model electrical machine insulation end cap only are 11 kinds totally 21, than existing motor with 13 kinds of the parts of end cap totally 29 save 2 kinds totally 8, and saved the bigger insulating sleeve of difficulty of processing, production cycle and production cost are significantly shortened and reduction;

The insulating part of (III) the utility model electrical machine insulation end cap adopts composite insulating material to combine with winding, adhesion process, makes it have higher intrinsic dielectric strength, mechanical tenacity, flexibility and resilience;

The securing member of (IV) the utility model electrical machine insulation end cap is arranged in the internal axle sleeve and cooperates inside and outside bearing cap locking, insulating case is arranged between internal axle sleeve and the end cap, it is bonding that the end of its internal axle sleeve between outer bearing cover and inside cap, insulating case, end cap cooperation place also adopts dead ring to carry out insulating cement, make the globality of insulation system better, sealing, insulation effect is more reliable, safety, and can not occur in inside and outside bearing cap and circuit between machine shaft communicates the time, bearing produces shaft current;

Cooperations is full of in cooperating for surpassing of the insulating case of (V) the utility model electrical machine insulation end cap and end cap, ton has more 20 tons than the existing motor of interference fit with adhesion 〉=10 of end cap, reaches adhesion＞30 ton, makes its combination more solid and reliable;

The insulation of (VI) the utility model electrical machine insulation end cap is reliable, excellent insulation performance, anti-thermal-electrical aging nargin is big, the performance height, be not only applicable to common AC and DC motor product, it is high to be applicable to that also operational reliability requires, and requiring useful life longer wind-driven generator promptly to use life requirements is 20 years and the motor product of carrying out special duty, purposes.

The utility model electrical machine insulation end cap is fit to sealing, the insulation of all kinds of machine shaft bearings; Especially be fit to the usefulness that operational reliability requires the wind-driven generator high, that will rectificate useful life and carries out the AC and DC motor product of special duty, purposes.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Description of drawings

Fig. 1 is the front view of the utility model electrical machine insulation end cap.

Fig. 2 is the I place enlarged diagram of Fig. 1.

Fig. 3 is the front view of existing motor with end cap.

Fig. 4 is the I place enlarged diagram of Fig. 3.

Among the figure: 1, machine shaft, 2, bearing, 3, internal axle sleeve, 4, end cap, 5, bolt, 6, outer bearing cover, 7, inside cap, 8, insulating case, 9, dead ring, 10, insulated tube.

Embodiment

Shown in accompanying drawing, a kind of electrical machine insulation end cap, it comprises machine shaft 1, be fixed on the bearing 2 on the machine shaft 1, bearing 2 is suit internal axle sleeve 3 radially, end cap 4 and axially place outer bearing cover 6 through bolt 5, internal axle sleeve 3, inside cap 7 lockings form, at internal axle sleeve 3, insulating case 8 is set between the end cap 4, insulating case 8 is a composite insulation layer, it selects for use the composite insulating material winding to form in internal axle sleeve 3 external cylindrical surfaces, adopt interference fit between insulating case 8 and the end cap 4, internal axle sleeve 3 between outer bearing cover 6 and inside cap 7, insulating case 8, the end of end cap 4 cooperation places is provided with dead ring 9, and adopt insulating cement bonding, make outer bearing cover 6 and inside cap 7 and internal axle sleeve 3, insulating case 8, the end of end cap 4 cooperation places is in conjunction with getting firm more and becoming overall structure.

With reference to accompanying drawing, the utility model electrical machine insulation end cap is with the improvement on the end cap at existing motor, it and existing motor with the difference of end cap are: existing motor comprises machine shaft 1 with end cap, be fixed on the bearing 2 in the rotating shaft 1, bearing 2 is suit internal axle sleeve 3, end cap 4 and axially place outer bearing cover 6, end cap 4, inside cap 7 lockings through bolt 5 and form radially; Insulating barrier is located between internal axle sleeve 3 and the end cap 4, and at internal axle sleeve 3, insulating case 8, the end of end cap 4 cooperation places covers a layer insulating or an equipped dead ring again, plug-in mounting insulated tube 10 in the axial installing hole of end cap 4 then, then outer bearing cover 6 that is provided with rubber washer and inside cap 7 are lock onto on the end cap 4 that is set with internal bearing sleeve 3, and at leading section suit one insulating washer of insulated tube 10, bolt 5 with the suit packing ring axially places outer bearing cover 6 again, insulated tube 10 in the end cap 4, inside cap 7 lockings form the electrical machine insulation end cap seal structure with insulation function, and its mode of being locked is at outer bearing cover 6, end cap 4, inside cap 7 axially on.

The utility model electrical machine insulation end cap after the improvement, its mode of being locked be outer bearing cover 6, internal axle sleeve 3, inside cap 7 axially on.And adopted composite material to make insulating case 8, dead ring 9, and insulating case 8 adopts the interference fit gap to strengthen firmness with end cap 4, and dead ring 9 adopts the overall structure of adhesion process.

The utility model after the improvement, structure is extremely simple, used insulating part from original 4 kinds totally 11 reduce to and have only 2 kinds totally 3, the quantity that its insulating part reduces surpasses 73%, used parts reduce to 21 from original 29, and the quantity that its parts reduce surpasses 28%; Heat-resisting and the reliability scheme compared with before-improvement of its sealing property, insulation improves greatly, and failure rate is almost nil; The machine work preface at its used technology, insulated combination place and requirement on machining accuracy all obviously reduce, manufacturing cycle shortens greatly, production cost significantly reduces, it is widely used in the AC and DC motor product, is particularly useful for operational reliability and requires in wind-driven generator high, that the requirement in useful life is long and the motor products such as execution particularity task, purposes.

Claims

1. electrical machine insulation end cap, it is characterized in that it comprises machine shaft (1), be fixed on the bearing (2) on the machine shaft (1), bearing (2) is suit internal axle sleeve (3), end cap (4) and axially place outer bearing cover (6), internal axle sleeve (3), inside cap (7) locking through bolt (5) and form radially, between internal axle sleeve (3), end cap (4) insulating case (8) is set, the end of the internal axle sleeve (3) between outer bearing cover (6) and inside cap (7), insulating case (8), end cap (4) cooperation place is provided with dead ring (9).

2. a kind of electrical machine insulation end cap according to claim 1 is characterized in that being between insulating case (8) and the end cap (4) interference fit.

3. a kind of electrical machine insulation end cap according to claim 1 is characterized in that insulating case (8) is a composite insulation layer.