WO2022068032A1

WO2022068032A1 - Electric motor, and housing thereof

Info

Publication number: WO2022068032A1
Application number: PCT/CN2020/132655
Authority: WO
Inventors: 丰帆; 郑国丽; 晏才松; 周立安; 刘龙辉; 阎阳
Original assignee: 中车株洲电机有限公司
Priority date: 2020-09-30
Filing date: 2020-11-30
Publication date: 2022-04-07
Also published as: CN112134396A

Abstract

An electric motor and a housing thereof. The housing comprises a housing body, wherein the housing body is provided with several cooling air channels, and the housing body is provided with a radial air inlet, which is in communication with all the cooling air channels, such that cold air flows into the cooling air channels from the radial air inlet. Air intake deflectors are provided at the radial air inlet, and the air intake deflectors guide the cold air to flow uniformly so as to provide conditions for the uniform flowing of cold air into the cooling air channels. Further, the outer periphery of the housing body is fixedly provided with several air channel deflectors, by which the cold air entering via the radial air inlet is diverted such that the cold air uniformly flows into all the cooling air channels, so as to avoid non-uniform heat dissipation in the cooling air channels, achieve stable dissipation of heat of a stator, and ensure the stable operation of the electric motor.

Description

A motor and its casing

This application claims the priority of the Chinese patent application filed on September 30, 2020 with the application number 202011063815.6 and the invention titled "A motor and its casing", the entire contents of which are incorporated into this application by reference.

technical field

The present invention relates to the technical field of motors, in particular to a motor and a casing thereof.

Background technique

In order to prevent foreign objects such as dust, moisture, acid and alkali from damaging the permanent magnets of the motor, taking the permanent magnet motor as an example, the motor usually adopts a closed casing, which makes the ventilation and cooling performance of the motor one of the key factors affecting the motor capacity. Good ventilation and cooling The performance can keep the motor at a low temperature rise level, which is beneficial to reduce thermal deformation and vibration wear, and ensure that the motor has a long service life. The side wall of the machine base of the existing motor is provided with several cooling air ducts. The seat realizes cooling and cooling. In order to improve the cooling efficiency, the cooling air duct is provided with radially extending radiating fins, which can stir the hot air in the cooling air duct and the cold air to produce obvious turbulent mixing and accelerate the heat exchange speed.

However, under the hindrance of the cooling fins, the cold air in the cooling air duct flows unevenly along the axial direction of the machine base, resulting in uneven heat dissipation of the machine base, which in turn affects the uniform heat dissipation of the stator in the machine base, making the stator extremely vulnerable to local temperature. The rise is too high and the irreversible demagnetization problem occurs, which affects the stable operation of the motor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a casing of a motor, the radial air inlet is provided with an air inlet guide plate, the casing body is provided with an air duct guide plate, and the cold air entering the radial air inlet is provided with the air inlet guide plate and the wind guide plate. Under the combined action of the duct baffles, the cooling air flows into all the cooling air ducts evenly, the heat dissipation is uniform, and the motor runs stably.

Its specific plan is as follows:

The casing of the motor provided by the present invention includes:

The shell body is provided with a number of cooling air ducts; the shell body is provided with radial air inlets that communicate with all the cooling air ducts, and the radial air inlets are provided with air inlet guide plates for guiding the uniform flow of cold air;

Several air duct guide plates are fixed on the shell body and used to divide the cold air entering from the radial air inlet to make the cold air flow into all the cooling air ducts uniformly.

Preferably, the radial air inlet is provided with two air inlet guide plates, and the two air inlet guide plates are distributed in a figure-eight shape to divide the radial air inlet into radial branch air outlets, forward branch air outlets and reverse branch air outlets, The radial branch tuyere is used to guide the cold air to flow in the radial direction, and the forward branch tuyere and the reverse branch tuyere are respectively located on both sides of the radial branch tuyere and are respectively used to guide the cold air to flow in the reverse direction around the circumference of the casing body.

Preferably, all the air duct baffles are staggered and distributed along the axial and circumferential directions of the housing body at the same time, so as to separate the cold air flowing from the radial air inlet into a plurality of guide branch air ducts corresponding to a plurality of cooling air ducts .

Preferably, all the air duct deflectors are arc-shaped.

Preferably, all the air duct deflectors are integrally provided on the housing body.

Preferably, any cooling air duct is provided with a plurality of radially extending radiating fins.

Preferably, it also includes:

At least two temperature detectors evenly distributed on the outer periphery of the shell body and located at the air outlet of the cooling air duct for detecting the temperature of the outer circumference of the shell body;

sirens for sounding alarms;

The controller is respectively connected with all the temperature detection parts and the alarm, and the controller is used to start the alarm when the temperature fed back by any one of the temperature detection parts is greater than the preset temperature according to the signal sent by the temperature detection parts.

The motor provided by the present invention includes the casing described in any one of the above.

Compared with the background art, the casing of the motor provided by the present invention includes a casing body, the casing body is provided with several cooling air ducts, the casing body is provided with radial air inlets, and the radial air inlets are communicated with all the cooling air passages, so that the cooling Air flows into the cooling air ducts from the radial air inlets. The radial air inlet is provided with an air intake deflector, which guides the cold air to flow evenly and provides conditions for the cold air to flow into the cooling air duct evenly. Further, a number of air duct baffles are fixed on the outer periphery of the shell body, and the air duct baffles divide the cold air entering from the radial air inlet, so that the cold air flows evenly into all the cooling air ducts, avoiding the cooling air duct. The heat dissipation is uneven, so that the stator can achieve stable heat dissipation and ensure the stable operation of the motor.

The motor provided by the present invention has the same beneficial effect.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a layout diagram of an air duct baffle plate on a casing of a motor provided by a specific embodiment of the present invention;

2 is a layout diagram of an air intake deflector on a casing of a motor provided by a specific embodiment of the present invention;

3 is a cross-sectional view of a cooling air duct of a casing of a motor provided by a specific embodiment of the present invention;

FIG. 4 is a layout diagram of heat dissipation fins in a housing of a motor provided by a specific embodiment of the present invention.

The reference numbers are as follows:

Shell body 1, cooling air duct 2, radial air inlet 3, air inlet deflector 4 and air duct deflector 5;

cooling fins 21;

Radial branch tuyere 31 , forward branch tuyere 32 and reverse branch tuyere 33 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIG. 1 to FIG. 4 , FIG. 1 is a layout diagram of an air duct baffle plate of a casing of a motor provided by a specific embodiment of the present invention; FIG. 2 is a casing of a motor provided by a specific embodiment of the present invention. The layout diagram of the wind deflector; FIG. 3 is a cross-sectional view of a cooling air duct of a casing of a motor provided by a specific embodiment of the present invention; FIG. 4 is a specific embodiment of the present invention. The heat dissipation in the casing of the motor is provided Fin layout diagram.

The embodiment of the present invention discloses a casing of a motor, including a casing body 1, wherein a stator and a rotor are arranged in the casing body 1, and the connection relationship between the casing body 1, the stator and the rotor may refer to the prior art.

The side wall of the casing body 1 is provided with several cooling air ducts 2 , each cooling air duct 2 extends along the axial direction of the casing body 1 , and all the cooling air ducts 2 are evenly distributed along the circumferential direction of the casing body 1 . Both ends of each cooling air duct 2 are respectively connected to the outside, so that the cold air flowing in from the outside and the hot air released by the shell body 1 conduct heat exchange in the cooling air duct 2 to achieve cooling and cooling.

The shell body 1 is provided with a radial air inlet 3 , and the radial air inlet 3 is communicated with all the cooling air ducts 2 , so that the cold air flows into the cooling air duct 2 from the radial air inlet 3 . The radial air inlet 3 is provided with an air intake guide plate 4 , and the air intake guide plate 4 guides the cold air to flow uniformly and provides conditions for the cold air to flow into the cooling air duct 2 evenly. Of course, the number of radial air inlets 3 provided in the casing body 1 is less than one, which is specifically set according to the specifications of the casing body 1 .

A number of air duct deflectors 5 are fixed on the outer periphery of the shell body 1, and the air duct deflectors 5 are located at the air inlets of all the cooling air ducts 2. The cold air is divided so that the cold air flows into all the cooling air ducts 2 .

From the above, it can be seen that the cold air entering from the radial air inlet 3 in the present invention can flow into all the cooling air ducts 2 uniformly under the combined action of the air inlet deflector 4 and the air duct deflector 5, so as to avoid the cooling air duct 2. The internal heat dissipation is uneven, so that the stator can achieve stable heat dissipation and ensure the stable operation of the motor.

In this specific embodiment, the radial air inlet 3 is provided with two air intake guide plates 4, and the two air intake guide plates 4 are distributed in a figure-eight shape. The large diameter end is opposite to the shell body 1, and the two air inlet guide plates 4 divide the radial air inlet 3 into three air outlets: radial branch air outlet 31, forward branch air outlet 32 and reverse branch air outlet 33, so that the cold air flows evenly The outer side of the shell body 1 provides favorable conditions for the cooling air to flow into the cooling air duct 2 evenly. The radial branch tuyere 31 is used to guide the cold air to flow in the radial direction, the forward branch tuyere 32 and the reverse branch tuyere 33 are located on both sides of the radial branch tuyere 31 respectively, and the forward branch tuyere 32 guides the cold air in the circumferential direction of the casing body 1 Clockwise rotation, the reverse branch tuyere 33 rotates counterclockwise around the casing body 1 , that is, the forward branch tuyere 32 and the reverse branch tuyere 33 respectively guide the cold air to flow reversely around the circumference of the casing body 1 . Of course, the number and distribution of the air intake baffles 4 are not limited to this.

In this specific embodiment, all the air duct baffles 5 are staggered along the axial and circumferential directions of the housing body 1 at the same time, so that all the air duct baffles 5 separate the cold air flowing from the radial air inlet 3 into several A number of diversion branch air ducts, so that several diversion branch air ducts are connected with several cooling air ducts 2 correspondingly. All cooling air duct 2.

All air duct deflectors 5 are arc-shaped, and the curvature of each air duct deflector 5 is determined by the number and width of the cooling air ducts 2, and the guide branch air ducts are aligned with the cooling air duct 2. There is no specific limitation here. Of course, all the air duct baffles 5 may also be in the shape of a zigzag line.

In order to make the structure compact, all the air duct deflectors 5 are integrally provided on the outer side of the casing body 1 . Of course, the installation manner of the air duct deflector 5 is not limited to this.

Any cooling air duct 2 is provided with a number of cooling fins 21, and the cooling fins 21 extend in the radial direction, so as to use the thermal fins to stir the cooling air duct 2, so that the cooling air duct 2 can produce obvious turbulence, thereby cooling The hot air and the cold air in the air duct 2 speed up the heat exchange, which is beneficial to improve the heat exchange efficiency, thereby improving the heat dissipation efficiency of the shell body 1 .

In order to prevent the local temperature of the shell body 1 from being too high, the present invention also includes a temperature detection part, an alarm and a controller, the temperature detection parts include at least two, and all the temperature detection parts are uniformly distributed on the outer circumference of the shell body 1 in a ring shape, and all The temperature detectors are all arranged at the air outlet of the cooling air duct 2 , so as to detect the temperature of the outer periphery of the housing body 1 after being cooled by the cooling air duct 2 . The temperature detection member may be a temperature sensor. The controller is connected with all the temperature detection parts and alarms. When the temperature fed back by any temperature detection part is greater than the preset temperature, the corresponding temperature detection part sends a signal to the controller, and the controller activates the alarm to remind the maintenance personnel of the motor.

The motor provided by the present invention, including the above-mentioned housing, has the same beneficial effect.

The motor and its casing provided by the present invention have been introduced in detail above. The principles and implementations of the present invention are described with specific examples in this paper. The descriptions of the above embodiments are only used to help understand the method and its core of the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. To sum up, the content of this specification should not be construed as a limitation of the present invention.

Claims

A casing of a motor, characterized in that it includes:

A shell body (1) provided with a number of cooling air ducts (2); the shell body (1) is provided with radial air inlets (3) communicating with all the cooling air ducts (2), and the diameter The air inlet (3) is provided with an air inlet guide plate (4) for guiding the uniform flow of cold air;

A number of air duct guides are fixed to the housing body (1) and used to divide the cold air entering from the radial air inlets (3) so that the cold air flows evenly into all the cooling air ducts (2). flow plate (5).
The casing of the electric motor according to claim 1, characterized in that, the radial air inlet (3) is provided with two air inlet baffles (4), and two air inlet baffles (4) ) is distributed in a figure-eight shape to divide the radial air inlet (3) into radial branch air outlets (31), forward branch air outlets (32) and reverse branch air outlets (33), the radial branch air outlets (31) For guiding the cold air to flow in the radial direction, the forward branch tuyere (32) and the reverse branch tuyere (33) are respectively located on both sides of the radial branch tuyere (31) and are respectively used to guide the cold air around the The casing body (1) flows in the opposite direction in the circumferential direction.
The casing of the motor according to claim 1, characterized in that, all the air duct baffles (5) are staggered and distributed along the axial direction and the circumferential direction of the casing body (1) at the same time, so that the air inlets from the radial direction are staggered. (3) The inflowing cold air is divided into a plurality of diversion branch air ducts correspondingly communicated with the plurality of the cooling air ducts (2).
The housing of the electric motor according to any one of claims 1 to 3, characterized in that, all the air duct deflectors (5) are arc-shaped.
The casing of the motor according to any one of claims 1 to 3, characterized in that, all the air duct deflectors (5) are integrally provided on the casing body (1).
The casing of the motor according to any one of claims 1 to 3, characterized in that, any one of the cooling air ducts (2) is provided with a plurality of radiating fins (21) extending radially.
The casing of the motor according to any one of claims 1 to 3, characterized in that, further comprising:

at least two temperature detectors evenly distributed on the outer circumference of the casing body (1) and located at the air outlet of the cooling air duct (2) for detecting the temperature of the outer circumference of the casing body (1);

sirens for sounding alarms;

A controller connected to all the temperature detection parts and the alarm device respectively, the controller is used to start all the temperature detection parts according to the signal sent by the temperature detection parts when the temperature fed back by any one of the temperature detection parts is greater than the preset temperature. the alarm.
A motor, characterized in that it comprises the casing described in any one of claims 1 to 7 .