CN211351933U

CN211351933U - Motor insulation shaft

Info

Publication number: CN211351933U
Application number: CN201922328294.1U
Authority: CN
Inventors: 王贵
Original assignee: Wuxi Dongyuan Motor Co ltd
Current assignee: Wuxi Dongyuan Motor Co ltd
Priority date: 2019-12-22
Filing date: 2019-12-22
Publication date: 2020-08-25
Anticipated expiration: 2029-12-22

Abstract

The utility model aims to provide a motor insulating shaft, which solves the problem that a motor shaft is easily corroded by current; the bearing comprises a bearing 1, an insulating plate 2, a motor shaft 3, an insulating coating 4 and a shaft shoulder 5; the bearing 1 is sleeved on the outer surface of the motor shaft 3; the insulating coating 4 is arranged between the bearing 1 and the motor shaft 3; the shaft shoulder 5 is arranged on one side of the motor shaft 3; the insulating plate 2 is arranged between the motor shaft and the shaft shoulder 5; the utility model has the advantages that: the corrosion of shaft current to the bearing can be effectively avoided, and compared with a motor adopting an insulating bearing design, the motor can achieve the same insulating effect by only slightly processing the shaft, and the production cost is reduced.

Description

Motor insulation shaft

Technical Field

The utility model relates to a part structure of motor especially relates to an insulating axle of motor.

Background

At present, a plurality of motors are subjected to shaft current corrosion, the shaft current can damage an oil film, the temperature of a bearing is increased, lubricating oil is carbonized and deteriorated, and the service life of the motor is greatly shortened. It is now common to add grounded carbon brushes or replace expensive insulated bearings. But this leads to a high and uneconomical increase in the cost of the motor. Is not beneficial to the market demand.

The published Chinese utility model patent has the publication number: CN101626181B, patent name: the utility model provides a preparation method and insulating bearing housing of motor insulation bearing housing, application date: 20090817, it discloses a method for manufacturing the insulating bearing outer sleeve of the motor bearing and the insulating bearing outer sleeve of the motor bearing, firstly wrapping a layer of insulating material on the inner sleeve of the insulating outer sleeve of the motor bearing, then sintering the insulating material on the inner sleeve of the insulating outer sleeve of the motor bearing by adopting a heating mode, forming a uniform insulating layer on the inner sleeve of the motor bearing insulating outer sleeve, sintering an insulating material on the inner sleeve of the motor bearing insulating outer sleeve to form the insulating layer, naturally cooling to normal temperature, the outer sleeve of the motor bearing insulating outer sleeve is heated to be expanded by heating, and is sleeved into the cooled inner sleeve of the motor bearing insulating outer sleeve with the insulating layer after being expanded, and then the outer sleeve of the motor bearing insulating outer sleeve is naturally cooled, so that the outer sleeve of the motor bearing insulating outer sleeve can be tightly hooped on the insulating layer of the inner sleeve of the motor bearing insulating outer sleeve after being cooled, and a complete motor bearing insulating outer sleeve is formed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor insulation axle has solved the easy problem that is corroded by the electric current of motor shaft.

The utility model provides a motor insulation shaft, which comprises a bearing 1, an insulation board 2, a motor shaft 3, an insulation coating 4 and a shaft shoulder 5;

the bearing 1 is sleeved on the outer surface of the motor shaft 3; the insulating coating 4 is arranged between the bearing 1 and the motor shaft 3; the shaft shoulder 5 is arranged on one side of the motor shaft 3; the insulating plate 2 is disposed between the motor shaft and the shoulder 5.

Preferably, the insulating coating 4 is provided between the motor shaft 3 and the bearing 1 at a bearing location on the non-load side.

Preferably, the insulating coating 4 is also provided between the insulating plate 2 and the shoulder 5.

Preferably, the insulating coating 4 is also provided on the outer surface of the shoulder 5.

Preferably, the material of the insulating coating 4 is alumina powder with a certain film thickness.

Preferably, the distance from the outer diameter to the inner diameter of the insulating plate 2 is greater than the linear distance from the outer surface of the shoulder 5 to the outer surface of the motor shaft 3.

Preferably, the area covered by the insulating coating 4 on the motor shaft 3 is larger than the contact area of the bearing 1 and the motor shaft 3.

The utility model has the advantages that: the corrosion of shaft current to the bearing can be effectively avoided, and compared with a motor adopting an insulating bearing design, the motor can achieve the same insulating effect by only slightly processing the shaft, and the production cost is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of an insulating coating;

in the figure, the position of the upper end of the main shaft,

1. a bearing; 2. an insulating plate; 3. a motor shaft; 4. an insulating coating; 5. and a shaft shoulder.

Detailed Description

The present invention will now be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way.

In the present exemplary embodiment, the insulating coating 4 is preferably arranged between the motor shaft 3 and the bearing 1 at the non-load-side bearing location.

Preferably, in this embodiment, the insulating coating 4 is further disposed between the insulating plate 2 and the shoulder 5.

Preferably, the insulating coating 4 is also disposed on the outer surface of the shoulder 5.

In the present embodiment, the material of the insulating coating 4 is alumina powder, that is, alumina powder with a certain film thickness.

In this embodiment, it is preferable that the distance from the outer diameter to the inner diameter of the insulating plate 2 is greater than the linear distance from the outer surface of the shoulder 5 to the outer surface of the motor shaft 3.

In the present embodiment, it is preferable that the coverage area of the insulating coating 4 on the motor shaft 3 is larger than the contact area of the bearing 1 and the motor shaft 3.

The bearing position (including the edges at two sides of the bearing) at the non-load side of the motor is additionally coated with the insulating coating 4, thereby isolating the motor shaft 3 from the bearing 1, effectively avoiding the influence of shaft current on the bearing as much as possible and protecting the bearing 1

What has been proposed in particular is, in order to furthest's assurance insulating coating 4 can completely cut off motor shaft 3 and bearing 1, set up an insulation board 2 between bearing 1 and shaft shoulder 5, avoided insulating coating 4 because of the poor problem that leads to the electric current to switch on of spraying at the step section, played the effect of double-deck insurance.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An insulating shaft of a motor comprises a bearing (1), an insulating plate (2), a motor shaft (3), an insulating coating (4) and a shaft shoulder (5);

it is characterized in that the preparation method is characterized in that,

the bearing (1) is sleeved on the outer surface of the motor shaft (3); the insulating coating (4) is arranged between the bearing (1) and the motor shaft (3); the shaft shoulder (5) is arranged on one side of the motor shaft (3); the insulation plate (2) is arranged between the motor shaft and the shaft shoulder (5).

2. An insulated motor shaft according to claim 1, characterized in that the insulating coating (4) is arranged between the motor shaft (3) and the bearing (1) at the non-load side bearing location.

3. An electric machine insulated shaft according to claim 2, characterized in that the insulating coating (4) is also arranged between the insulating plate (2) and the shaft shoulder (5).

4. An electric machine insulated shaft according to claim 3, characterized in that the insulating coating (4) is also provided on the outer surface of the shaft shoulder (5).

5. An insulated shaft for electric machines according to claim 4, characterized in that the material of the insulating coating (4) is alumina powder.

6. A motor-insulated shaft according to claim 5, characterized in that the distance from the outer diameter to the inner diameter of the insulating plate (2) is greater than the linear distance from the outer surface of the shaft shoulder (5) to the outer surface of the motor shaft (3).

7. A motor-insulated shaft as claimed in claim 6, characterized in that the insulating coating (4) covers a larger area of the motor shaft (3) than the contact area of the bearing (1) with the motor shaft (3).