WO2018054224A1

WO2018054224A1 - Honeycomb-type closed ventilation and cooling device for motor

Info

Publication number: WO2018054224A1
Application number: PCT/CN2017/100857
Authority: WO
Inventors: 李伟力; 曹君慈; 李栋; 张晓晨; 李金阳; 张智娟; 沈稼丰; 李锦州
Original assignee: 北京交通大学
Priority date: 2016-09-20
Filing date: 2017-09-07
Publication date: 2018-03-29
Also published as: CN106385122A; RU2725180C1

Abstract

A honeycomb-type closed ventilation and cooling device for a motor, mainly comprising: the back side of a stator yoke of a motor is provided with axial ventilation holes (2) along a circumferential direction; the axial ventilation holes (2) are at a distance from a stator winding (5) of the motor; stainless steel circular pipes (3-1, 3-2) are inserted into the axial ventilation holes (2); both ends of an axial ventilation pipe are fixedly connected to a circular plate (4); an ventilation opening (1) is provided above the circular plate (4) on a housing. The axial ventilation holes (2) are uniformly distributed along the circumferential direction. The honeycomb-type closed ventilation system is simple in structure, improves the ventilation and cooling effect of a motor, and improves the safety and the stable operation capability of the motor. The present invention can cool an iron core and a linear winding at the back side of a stator yoke, as well as an end winding of a stator and a rotor iron core (6), and thus can effectively improve the cooling effect of the iron core and the winding at the back side of the stator yoke, and isolate the end winding from the outside so as to protect the end winding from being damaged due to the environment.

Description

Honeycomb type closed air ventilation cooling device

[0001] The present invention relates to the field of cooling technology for electric machines, and more particularly to a honeycomb type closed ventilation cooling device for an electric machine.

Background technique

[0002] At present, motors used in many fields such as high-speed rail and rail transit are affected by natural conditions such as sand, dust, rain and fog, and traditional cooling methods are not only difficult to adapt to the cooling requirements of the motor, but also may cause the motor to appear. Faults such as temperature rise, short circuit, etc., especially for permanent magnet traction motors, the above factors may cause local demagnetization of the permanent magnets. Therefore, the study of efficient ventilation cooling systems is not only related to the operating life of the motor, but also to the safe operation of the train.

[0003] The traditional open-air ventilation and cooling structure, the end winding is affected by natural conditions such as sand and moisture, so that the end is damp, the insulation resistance is reduced, the winding is short-circuited, and even the motor is burned; and the traditional closed ventilation cooling structure is forever The magnets and the end windings are not effectively cooled, which will cause the end windings and permanent magnets to be too hot. The end windings may be burnt due to excessive temperature, and the permanent magnets are extremely sensitive to temperature. Excessive temperature is easy to cause. The permanent magnet is partially demagnetized, causing damage to the motor.

technical problem

Embodiments of the present invention provide a honeycomb-type closed-ventilation cooling device for an electric motor to achieve effective ventilation cooling of the motor.

Problem solution

Technical solution

In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] A honeycomb type closed-air ventilation and cooling device for an electric motor, comprising:

[0007] in the circumferential direction of the stator yoke of the motor, there is an axial venting hole, the axial venting hole is spaced from the stator winding of the motor, and a stainless steel round tube is inserted into the axial venting hole, The two ends of the axial ventilation pipe are fixedly connected with the circular plate, and a venting port is arranged above the circular plate on the casing.

Further, the axial vent holes are evenly distributed in the circumferential direction. [0009] Further, a stainless steel ventilation tube is inserted into the air inlet and the air outlet of the axial vent.

[0010] Further, the stainless steel ventilation tube is made of a non-magnetic high-resistance material.

[0011] Further, both ends of the axial ventilation tube and the circular plate are welded and connected.

[0012] Further, the air is introduced through the vent through the air vent, and the air flows into the axial vent through the stainless steel venting tube, and the heat-bearing wind exchanges heat with the air outside the motor cover. .

[0013] It can be seen from the technical solutions provided by the embodiments of the present invention that the honeycomb-type closed ventilation system provided by the embodiment of the invention has a simple structure, improves the ventilation cooling effect of the motor, and improves the safety and stable operation of the motor. ability. The two ends of the stainless steel ventilation tube are welded to the circular plate to play the role of air guiding, which can cool the iron core and the straight segment winding on the back side of the stator yoke, and also cool the stator end winding and the rotor core, which can not only effectively improve the stator. The cooling effect of the iron core and the winding on the back of the yoke, and the end winding can be isolated from the outside to avoid damage caused by the environment.

[0014] Additional aspects and advantages of the invention will be set forth in part in the description which follows.

Advantageous effects of the invention

Beneficial effect

[0015] The honeycomb type closed ventilation system provided by the invention can effectively avoid the traditional ventilation and cooling system from being affected by natural conditions such as sand, rain and fog, and effectively avoid damage to the motor caused by excessive temperature of the end winding and the permanent magnet, and improve the motor. Ventilation cooling effect enhances the safety and stable operation of the motor.

Brief description of the drawing

DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those skilled in the art without any inventive labor.

1 is an axial cross-sectional view of a honeycomb-type closed ventilation and cooling system for an electric motor according to an embodiment of the present invention;

2 is a schematic view showing a direction in which a vent opening is provided and a direction in which a circular plate is inserted according to an embodiment of the present invention; [0019] FIG. 3 is a cross-sectional view of a circumferential direction of an axial vent hole according to an embodiment of the present invention; ; 4 is a partial cross-sectional view of a circumferential direction of an axial vent according to an embodiment of the present invention;

[0021] FIG. 5 is a schematic diagram of a stainless steel ventilation tube embedded in an axial ventilation hole according to an embodiment of the present invention.

[0022] In the figure: 1- vent; 2-axial vent; 3-1,3-2 stainless steel tube; 4-round plate; 5-statar winding; 6- rotor core; 7-axis.

Embodiments of the invention

[0023] The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions.

. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

[0024] The singular forms "a", "an", "the" It will be further understood that the phrase "comprising", used in the <RTI ID=0.0> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> is intended to mean the presence of the features, integers, steps, operations, components and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, components, components, and/or their groups. It will be understood that when we refer to an element being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or an intermediate element can be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The phrase "and/or" used herein includes any and all combinations of one or more of the associated listed.

[0025] Those skilled in the art will appreciate that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs, unless otherwise defined. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless defined as herein, will not be idealized or overly formal. Explanation.

[0026] In order to facilitate the understanding of the embodiments of the present invention, the following detailed description of the embodiments of the invention,

[0027] In order to solve the traditional cooling method affected by natural conditions such as sand, dust and rain fog, the end winding of the motor is burned due to excessive temperature, and the temperature of the permanent magnet of the rotor is excessively high and demagnetization occurs. The embodiment of the invention provides a honeycomb ventilation cooling system to solve the problems caused by the conventional ventilation cooling structure. Above The axial cross-sectional view of the honeycomb closed ventilation and cooling system is shown in Figure 1. In the figure: 1-ventilation; 2-axial venting; 3-1,3-2 stainless steel; 4-round; 5-stator Winding; 6-rotor core; 7-turn shaft.

[0028] An axial venting hole is provided in the circumferential direction on the back of the stator yoke, and the axial venting hole has a certain distance from the stator winding. Insert the stainless steel ventilation tube into the axial ventilation hole, and fix the two ends of the stainless steel ventilation tube to the circular plate. The fixed connection can be a welded connection.

[0029] There is a vent on the side of the circular plate on the casing, the air is introduced through the air pump, the air flows into the axial vent through the stainless steel venting tube, and finally the air with heat and the air outside the motor cover Perform heat exchange.

2 is a schematic view of the venting direction of the vent opening and the insertion direction of the circular plate. The venting opening is provided on the upper surface of the casing, and the circular plate is inserted under the side of the venting opening.

[0031] A cross-sectional view of the axial venting hole in the circumferential direction is shown in FIG. 3, and a partial cross-sectional view in the circumferential direction is shown in FIG. 4, and as can be seen in conjunction with FIG. 3 and FIG. 4, the axial venting hole and the stator are disposed on the back of the stator yoke. The winding has a certain distance, for example, this distance is about 20mm.

[0032] The axial venting holes are evenly distributed in the circumferential direction, resembling a honeycomb, and the ventilating cooling system of the present invention is named accordingly.

5 is a schematic view of a stainless steel ventilation tube embedded in an axial ventilation hole according to an embodiment of the present invention. Insert a stainless steel venting tube into the air inlet and outlet of the axial vent. The stainless steel vent tube is made of non-magnetic high-resistance material.

In summary, the honeycomb closed ventilation system provided by the embodiment of the invention has a simple structure, improves the ventilation cooling effect of the motor, and improves the safety and stable operation capability of the motor. The two ends of the stainless steel ventilation tube are welded to the circular plate to play the role of air guiding, which can cool the iron core and the straight segment winding on the back side of the stator yoke, and also cool the stator end winding and the rotor core, which can not only effectively improve the stator. The cooling effect of the iron core and the winding on the back of the yoke, and the end winding can be isolated from the outside to avoid damage caused by the environment.

The honeycomb type closed ventilation and cooling system provided by the embodiment of the invention can effectively avoid the traditional ventilation and cooling system from being affected by natural conditions such as sand, rain and fog, and effectively avoid damage to the motor caused by excessive temperature of the end winding and the permanent magnet. Improve the ventilation and cooling effect of the motor, and enhance the safety and stable operation of the motor.

[0036] Those skilled in the art can understand that the drawings are only schematic diagrams of one embodiment, and the modules in the drawings Or the process is not necessarily required to practice the invention.

[0037] Those skilled in the art can understand that the components in the device in the embodiment may be distributed in the device of the embodiment according to the embodiment, or may be correspondingly changed in one or more devices different from the embodiment. . The components of the above embodiments may be combined into one component or may be further split into a plurality of subcomponents.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Changes or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[Claim 1] A honeycomb type closed ventilation and cooling device for an electric motor, comprising:

An axial venting hole is circumferentially arranged on the back of the stator yoke of the motor, the axial venting hole is spaced from the stator winding of the motor, and a stainless steel circular tube is inserted into the axial venting hole to vent the axial direction Both ends of the tube are fixedly connected with the circular plate, and a vent is provided above the circular plate on the casing.

[Claim 2] The apparatus according to claim 1, wherein the axial vent holes are evenly distributed in the circumferential direction.

[Claim 3] The apparatus according to claim 1, wherein a stainless steel ventilation pipe is inserted into the air inlet and the air outlet of the axial vent.

[Claim 4] The apparatus according to claim 3, wherein the stainless steel vent circular tube is made of a non-magnetic high-resistance material.

[Clave 5] The apparatus according to claim 1, wherein both ends of the axial air duct are welded to the circular plate.

[Claim 6] The apparatus according to claim 1 or 2 or 3 or 4 or 5, wherein air is introduced through the vent by a wind pump, and air flows into the steam through the stainless steel vent tube Axial vents, heat-bearing wind exchanges heat with air outside the motor cover.