CN212935640U

CN212935640U - Bearing bush type motor

Info

Publication number: CN212935640U
Application number: CN202022230746.5U
Authority: CN
Inventors: 杨波明; 杨斌
Original assignee: Inner Mongolia Yitai Chemical Co ltd
Current assignee: Inner Mongolia Yitai Chemical Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-04-09
Anticipated expiration: 2030-10-09

Abstract

The utility model provides a bearing bush formula motor, including cooling fan (5) that are arranged in the motor inner chamber and bearing bush (3) of department, still include induced duct (6), the one end and the motor inner chamber intercommunication of induced duct, the other end communicates with the inner chamber of bearing bush. The utility model provides a bearing bush formula motor can effectively avoid the lubricating oil of bearing room to leak to motor winding to help improving the security of motor, increase of service life.

Description

Bearing bush type motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a bearing bush formula motor.

Background

The large-scale bearing bush type motor is mainly applied to large-scale equipment (such as a boiler high-pressure feed water pump), and a mode of combining a built-in cooling fan with water cooling is mostly adopted to cool the motor and a winding, but the following problems exist in the actual operation:

a. the built-in cooling fan rotates in the closed space to cause the negative pressure in the motor winding cavity to rise, under the action of the negative pressure, lubricating oil in the bearing chamber can leak to the motor winding and is mostly sprayed into the motor winding in an oil mist mode, and the leaked lubricating oil causes the aging of the motor winding to be accelerated, and poor insulation and even short circuit are caused.

b. A large amount of oil mist leaks into the winding cavity of the motor, so that the amount of lubricating oil of the bearing bush is reduced, the temperature of the bearing bush is increased or the bearing bush is burnt, and the operation of equipment is seriously influenced.

c. The aging and poor insulation of the motor winding lead to the shortening of the service life of the motor.

In summary, how to avoid the leakage of the lubricant in the bearing chamber to the motor winding becomes a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a bearing bush formula motor, this bearing bush formula motor can effectively avoid the lubricating oil of bearing room to leak to motor winding to help improving the security of motor, increase of service life.

In order to achieve the above object, the utility model provides a following technical scheme:

the bearing bush type motor comprises a cooling fan positioned in an inner cavity of the motor, a shaft seal positioned at a bearing bush and an air guiding pipe, wherein one end of the air guiding pipe is communicated with the inner cavity of the motor, and the other end of the air guiding pipe is communicated with the inner cavity of the shaft seal.

Optionally, in the above-mentioned bearing-shoe motor, the motor further includes an air-receiving box having an opening, the air-receiving box is fixed on the stator core support, and the opening is aligned with a gap seam on the circumferential surface of the stator core, and the other side of the air-receiving box opposite to the opening is communicated with one end of the induced draft tube close to the motor cavity.

Optionally, in the above-described shoe motor, the wind-receiving box has a cone shape.

Optionally, in the above-described shoe motor, the wind-receiving boxes are plural in number and are uniformly distributed around the axis of the stator core.

Alternatively, in the above-described shoe motor, the opening faces in the rotational direction of the motor shaft.

Optionally, in the above-mentioned tile motor, the induced duct is a metal hose.

Optionally, in the above-described shoe motor, the induced duct is screwed to the wind-receiving box.

According to the technical scheme, the utility model provides an among the axle bush formula motor, the one end and the motor inner chamber intercommunication of induced duct, the other end and the inner chamber intercommunication of bearing seal, consequently, the inner chamber of bearing seal is linked together through induced duct and motor inner chamber, and like this, when the cooling fan of motor inner chamber is rotatory, the inner chamber of the relative bearing seal of motor inner chamber just can not form the negative pressure, has not had the negative pressure effect, just can effectively avoid the lubricating oil of bearing room to leak to motor winding, and then can solve bearing bush temperature rising that lubricating oil leakage brought, a series of problems such as motor winding is ageing, from this can see, the utility model provides an axle bush formula motor helps improving the security of motor, increase of service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a bearing bush type motor provided by an embodiment of the present invention.

Labeled as:

1. a motor shaft; 2. bearing bushes; 3. shaft sealing; 4. a stator core; 5. a cooling fan; 6. an induced draft pipe; 7. and a wind receiving box.

Detailed Description

For the sake of understanding, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, the embodiment of the present invention provides a bearing bush type motor, which comprises a shaft seal 3, a cooling fan 5 and an induced duct 6, wherein, the cooling fan 5 is located in the inner cavity of the motor, the shaft seal 3 is located at the bearing bush 2, one end of the induced duct 6 is communicated with the inner cavity of the motor, and the other end is communicated with the inner cavity of the shaft seal 3.

Because the inner chamber of bearing seal 3 is linked together through induced duct 6 and motor cavity, so, when 5 rotatory in the motor inner chamber cooling fan, the relative bearing seal 3's of motor cavity inner chamber can not form the negative pressure, has not had the negative pressure effect, just can effectively avoid the lubricating oil of bearing room to leak to motor winding, and then can solve a series of problems such as axle bush temperature rising, motor winding ageing that lubricating oil leakage brought, from this, the utility model provides a bearing bush formula motor helps improving the security of motor, increase of service life.

In order to better guide the air in the motor cavity to the cavity of the shaft seal 3, in this embodiment, the bush-type motor further includes an air receiving box 7 having an opening, as shown in fig. 1, the air receiving box 7 is fixed on the stator core support, the opening of the air receiving box 7 is aligned with the gap seam on the circumferential surface of the stator core 4, and the other side of the air receiving box 7 opposite to the opening is communicated with one end of the induced duct 6 close to the motor cavity. In a specific practical application, the wind-receiving box 7 may be cone-shaped and aligned with the gap of the stator core 4 in a trumpet shape.

It should be noted that the stator core 4 with the gap is often found in a large-sized shoe motor, the wind-receiving boxes 7 are generally provided in plural because the size of the stator core 4 is large, and the wind-receiving boxes 7 are preferably arranged in a uniform manner around the axis of the stator core 4.

During the rotation of the motor shaft 1, the air coming out of the gap of the stator core 4 flows in a direction deviated to the motor shaft 1, so that the opening of the air receiving box 7 can be faced to the rotation direction of the motor shaft 1 when the air receiving box is installed, and the air can enter the air receiving box more easily.

In specific practical application, the induced air pipe 6 can be a metal hose, the induced air pipe 6 can be in threaded connection with the air receiving box 7, and the air receiving box 7 can be fixed on the stator core support in a welding mode.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The bearing bush type motor comprises a cooling fan (5) located in an inner cavity of the motor and a shaft seal (3) located at a bearing bush, and is characterized by further comprising an air guiding pipe (6), wherein one end of the air guiding pipe (6) is communicated with the inner cavity of the motor, and the other end of the air guiding pipe is communicated with the inner cavity of the shaft seal (3).

2. A bush-type electric motor according to claim 1, further comprising an air receiving box (7) having an opening, wherein the air receiving box (7) is fixed on the stator core support, the opening is aligned with a gap seam on the circumferential surface of the stator core (4), and the other side of the air receiving box (7) opposite to the opening is communicated with one end of the induced draft tube (6) close to the inner cavity of the motor.

3. A bearing-type electric motor according to claim 2, characterized in that said wind-receiving box (7) is cone-shaped.

4. A bushing-type electric machine according to claim 2, characterized in that the wind-receiving box (7) is plural in number and evenly distributed around the axis of the stator core (4).

5. A bushing-type motor according to claim 2, characterized in that the opening faces in the direction of rotation of the motor shaft (1).

6. A bushing-type electric machine according to any of claims 2-5, characterized in that the induced draft tube (6) is a metal hose.

7. A bearing-type electric motor according to claim 6, characterized in that the induced draft tube (6) is in threaded connection with the wind receiving box (7).