CN220067023U

CN220067023U - Cooling structure of motor coil winding

Info

Publication number: CN220067023U
Application number: CN202321086136.XU
Authority: CN
Inventors: 蒋剑雄; 许佳佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-11-21
Anticipated expiration: 2033-05-09

Abstract

The utility model discloses a cooling structure of a motor coil winding, which comprises a stator iron core and a coil winding penetrating through the stator iron core, wherein an outer ring at the exposed end of the coil winding is coated with a heat conducting ring which can penetrate into a gap of the coil winding and wrap the coil winding, the heat conducting ring is also provided with a cooling channel which can exchange heat with the coil winding, and the cooling channel is positioned at the outer side surface or the inner side surface or the end part of the coil winding. The heat conducting ring is provided with an inlet for the cooling channel to enter and an outlet for the cooling channel to pass through, and is made of heat conducting silica gel material. The cooling channel comprises an inlet section, an outlet section and an intermediate section connecting the inlet section and the outlet section. The utility model has the characteristics of simple manufacture and good heat conduction effect.

Description

Cooling structure of motor coil winding

Technical Field

The utility model relates to the field of cooling, in particular to a cooling structure of a motor coil winding.

Background

In the running process of the motor, as the coil has resistance to heat, if the heat cannot be dissipated in time, the temperature of the coil can be increased continuously, and after the temperature is increased, the internal resistance of the motor can be increased, so that the efficiency and the power output of the motor can be reduced sharply. In addition, the high temperature can damage the insulating layer of the coil, reduce the service life of the motor, even directly blow the stator coil to cause the motor to burn out, in order to cool the coil winding, a cooling structure which can be sleeved outside the coil winding and can perform heat exchange is mostly adopted, a gap exists between the cooling structure and the coil winding, the gap position conducts heat through air, the heat conductivity coefficient of the air is only 0.023W/m.K, the heat conduction effect is poor, and the existing cooling channel is mostly embedded in a shell during casting, so that the casting difficulty is high, the cost is high, and the cooling structure of the coil winding of the motor is designed.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a cooling structure of a motor coil winding, which is simple to manufacture and good in heat conduction effect.

In order to solve the technical problems, the utility model comprises a stator core and a coil winding penetrating the stator core, and the structure is characterized in that: the outer ring of the exposed end of the coil winding is coated with a heat conducting ring which can permeate into the gap of the coil winding and wrap the coil winding, and a cooling channel which can exchange heat with the coil winding is further arranged in the heat conducting ring.

Further, the cooling channel is located at an outer side or an inner side or an end of the coil winding.

Further, an inlet for the cooling channel to enter and an outlet for the cooling channel to pass through are arranged on the heat conducting ring, and the heat conducting ring is made of heat conducting silica gel material.

Further, the cooling channel includes an inlet section, an outlet section, and an intermediate section connecting the inlet section and the outlet section.

Further, the middle section is of a spiral structure.

Further, the middle section is of a spiral structure with fixed thread pitch.

Further, the middle section is composed of a plurality of sections of spiral structures with different pitches.

Further, the cross section of the cooling channel is round, rectangular or elliptical.

After adopting above-mentioned structure, through the outer lane coating of the naked one end of coil winding have can permeate the coil winding clearance in and wrap up the heat conduction ring of coil winding, the heat conduction ring adopts the high heat conduction silica gel material of coefficient of heat conductivity, can be with the heat transfer of coil winding production to the cooling channel on rapidly, carry out the heat exchange with the cooling medium in the cooling channel, finally, closely link together between coil winding, heat conduction ring and the cooling channel, form the heat exchange place, avoid the heat on the coil winding to pass through the air transfer to the cooling channel as far as, the heat conduction effect is better. Through setting the middle section of cooling channel to spiral structure, can increase the cooling route, increased the heat exchange area, make more cooling medium participate in the heat exchange, the cooling effect is better. Meanwhile, the cooling channel can be designed along with the shape according to the heating position, so that the effect of better cooling uniformity is achieved, the local high temperature of the coil winding is avoided, the cooling channel can be processed by adopting standard sectional materials with any cross-section shape, the cost is low, the method is suitable for mass production, and the manufacturing is simple.

Drawings

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

in the figure: stator core 1, coil winding 2, heat conduction ring 3, inlet 31, outlet 32, cooling channel 4, inlet section 41, intermediate section 42, outlet section 43.

Detailed Description

Referring to fig. 1 and 2, the cooling structure of the motor coil winding comprises a stator core 1 and a coil winding 2 penetrating the stator core 1, wherein the stator core 1 and the coil winding 2 are both existing products, an outer ring of the exposed end of the coil winding 2 is coated with a heat conducting ring 3 which can permeate into a gap of the coil winding 2 and wrap the coil winding 2, two ends of the stator core 1 in the figure are exposed with the coil winding 2, in order to conveniently display a heat conducting ring 3 only at one end, a cooling channel 4 which can exchange heat of the coil winding 2 is further arranged in the heat conducting ring 3, wherein the heat conducting ring 3 is made of a heat conducting silica gel material, other heat conducting materials can be adopted, the heat conducting coefficient is one of important parameters determining the performance of the materials, the heat conducting coefficient of the heat conducting silica gel is 0.8-5.0W/m.k, compared with the heat conducting coefficient of air which is 0.023W/m.k, the heat conducting structure has better heat conducting effect, heat generated by the coil winding 2 can be rapidly transferred to the cooling channel 4, the heat conducting ring can exchange heat with a cooling medium in the cooling channel 4, the cooling medium in the cooling channel 4 can be air and the like, the heat conducting ring can also be a freezing-proof liquid, the liquid and the liquid can be prevented from permeating into the gap between the coil winding 2 and the heat conducting ring 2 when the heat conducting ring is tightly connected to the inner side of the coil winding 2 or the coil winding 2 by the solid-shaped winding 4, or the heat conducting ring is tightly connected to the heat conducting ring 4, or the heat channel is directly connected to the heat conducting ring 2 through the heat conducting channel is formed by the heat channel and the heat channel.

Referring to fig. 1 and 2, the cooling channel 4 is located on the outer side or the inner side or the end of the coil winding 2, and the cooling channel 4 is shown to be located on the outer side of the coil winding 2, that is, the outer side of the annular integral structure formed by the coil winding 2, and the cooling channel 4 may be located on the inner side of the coil winding 2, that is, the inner side of the annular integral structure formed by the coil winding 2, or may be located on the end of the coil winding 2, that is, the axial end of the annular integral structure formed by the coil winding 2. The arrangement mode of the cooling channel 4 can be wrapped inside the heat conducting ring 3, and can also be fixed on the outer surface of the heat conducting ring 3, and the arrangement is described by taking the inside of the heat conducting ring 3 as an example, when processing, liquid heat conducting silica gel is coated on the coil winding 2 first, then the cooling channel 4 is sleeved outside the coil winding 2 containing the heat conducting silica gel, then the heat conducting silica gel is continuously coated until the cooling channel 4 is wrapped, finally, the heat conducting ring 3 is provided with an inlet 31 for the cooling channel 4 to enter and an outlet 32 for the cooling channel 4 to penetrate out, as shown in fig. 2, the cooling channel 4 comprises an inlet section 41, an outlet section 43 and an intermediate section 42 for connecting the inlet section 41 and the outlet section 43, the inlet section 41 corresponds to the inlet 31, the outlet section 43 corresponds to the outlet 32, wherein the intermediate section 42 is of a spiral structure, and the spiral structure is provided. When the middle section 42 is of a spiral structure, a spiral structure with fixed screw pitches can be adopted, and the coil winding can be designed to be composed of spiral structures with different screw pitches according to the structure of the coil winding 2 or the heating position, namely, the screw pitches of the cooling channels 4 at the heating position are small, the cooling channels 4 are dense, the cooling to the heating position is enhanced, the purpose of shape following design is achieved, the cooling uniformity is better, the coil winding 2 is prevented from being locally heated, compared with the existing method that the cooling channels are formed by embedding when the motor housing is cast, the processing difficulty is high, the cost is high, the efficiency is low, the maintenance and the replacement are inconvenient in the later use process, the housing is easy to be caused by adopting the casting embedding method, and the defect of heavy product quality exists. The cross section of the cooling channel 4 is circular, rectangular or elliptical, or any other shape, and can be processed by adopting standard sectional materials with one cross section shape, so that the cooling channel is low in cost, suitable for mass production, low in requirement on the motor shell due to the fact that the final heat exchange place is positioned in the motor shell, and simpler in motor shell structure.

Claims

1. The utility model provides a cooling structure of motor coil winding, includes stator core (1) and wears to adorn coil winding (2) on stator core (1), characterized by: the outer ring of the exposed end of the coil winding (2) is coated with a heat conducting ring (3) which can permeate into the gap of the coil winding (2) and wrap the coil winding (2), and a cooling channel (4) which can exchange heat with the coil winding (2) is further arranged in the heat conducting ring (3).

2. The cooling structure of a motor coil winding according to claim 1, characterized in that: the cooling channel (4) is located on the outer side or inner side or end of the coil winding (2).

3. A cooling structure of a motor coil winding according to claim 2, characterized in that: an inlet (31) for the cooling channel (4) to enter and an outlet (32) for the cooling channel (4) to pass through are arranged on the heat conducting ring (3), and the heat conducting ring (3) is made of heat conducting silica gel material.

4. A cooling structure of a motor coil winding according to claim 3, characterized in that: the cooling channel (4) comprises an inlet section (41), an outlet section (43) and an intermediate section (42) connecting the inlet section (41) and the outlet section (43).

5. The cooling structure of a motor coil winding according to claim 4, characterized in that: the intermediate section (42) is of helical configuration.

6. The cooling structure of a motor coil winding according to claim 5, characterized in that: the middle section (42) is of a spiral structure with a fixed pitch.

7. The cooling structure of a motor coil winding according to claim 5, characterized in that: the intermediate section (42) is composed of a plurality of helical structures with different pitches.

8. A cooling structure of a motor coil winding according to any one of claims 1 to 7, characterized in that: the cross section of the cooling channel (4) is round or rectangular or elliptical.