CN219843489U - Motor winding's tip heat radiation structure and motor - Google Patents

Abstract

The utility model relates to the technical field of motors and discloses an end heat dissipation structure of a motor winding and a motor, wherein the end heat dissipation structure of the motor winding comprises a shell; the stator iron core and the winding are arranged in the shell, and the stator iron core is contacted with the shell; the winding comprises a plurality of groups of coils which are arranged on the stator core and are distributed along the circumferential direction of the stator core; the heat conducting fin array comprises a plurality of heat conducting fins, the heat conducting fins are sequentially arranged between the shell and the plurality of groups of coils, the heat conducting fins are respectively contacted with the shell and one end of the coil, and the heat conducting fins can conduct the heat of the coil to the shell. The end heat dissipation structure of the motor winding has the advantages of good heat dissipation effect, simple structure and low cost.

Description

Motor winding's tip heat radiation structure and motor

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to an end heat dissipation structure of a motor winding and a motor.

Background

In the running process of the motor, the winding of the motor is a main heating source in an electrified state, the heat is mainly directly contacted with the stator core of the motor by virtue of the winding, the heat is brought to the shell of the motor by heat conduction, and then the final heat dissipation is carried out by applying cooling modes (water cooling, oil cooling, air cooling and the like) to the shell.

The motor end windings are the areas of the winding sections near the motor ends, which are generally not in contact with any solid medium, exposed directly to the air. Therefore, heat can only be dissipated inside the motor by means of thermal radiation, which can cause a huge local heat build-up. If the winding heads cannot dissipate heat in time, the local temperature of the motor is increased, and the performance and the service life of the motor are affected.

The end heat dissipation mode of the existing motor winding mainly comprises the following steps: direct air cooling and coolant cooling.

The direct air cooling is to increase the airflow at the end part by means of external or built-in fans, drainage, centrifugal heat dissipation and the like, so that the heat dissipation capacity of the end part is improved. However, in the cooling mode, the heat conductivity coefficient between the end winding and the air is not improved, so that the heat dissipation effect is not obvious, the surface wind speed is increased by adding extra fan power to realize cooling, the cost is huge, and meanwhile, the heat dissipation mode uses the field Jing Shouxian, and the protection level is lower.

The cooling liquid cooling is to completely infiltrate the motor stator into cooling oil, and the heat dissipation capacity is improved through direct contact between the cooling oil and the motor winding. However, this cooling method has many restrictions and inconveniences, and a great sealing cost is required because the cooling liquid directly contacts the electromagnetic components inside the motor. Meanwhile, in order to isolate the cooling liquid loop from the motor rotating part, a sleeve needs to be additionally arranged between the motor stator and the motor rotor, so that the width of an air gap of the motor is increased, and the performance of the motor can be influenced. Meanwhile, a series of auxiliary equipment such as pipelines, oil pumps and the like are additionally added for cooling by using the cooling liquid, so that the cost is high.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: the end heat dissipation structure of the motor winding and the motor are simple in structure, low in cost and good in heat dissipation effect.

The utility model solves the technical problems by adopting the technical scheme that the utility model provides an end heat dissipation structure of a motor winding, which comprises the following components:

a housing;

a stator core and a winding disposed in the housing, the stator core being in contact with the housing; the winding comprises a plurality of groups of coils, and the plurality of groups of coils are arranged on the stator core and are distributed along the circumferential direction of the stator core;

the heat conducting fin array comprises a plurality of heat conducting fins, wherein the heat conducting fins are sequentially arranged between the machine shell and the plurality of groups of coils, the heat conducting fins are respectively contacted with the machine shell and one end of the coils, and the heat conducting fins can conduct the heat of the coils to the machine shell.

Further, the plurality of heat conducting fins are in one-to-one correspondence with the plurality of coils, and one end of each coil is provided with one heat conducting fin.

Further, the heat conducting fin is movably connected with the casing, and one end of the heat conducting fin, which is close to the coil, is a free end so as to adapt to different heights of the coil.

Further, the casing is provided with a plurality of dovetail grooves along the circumferential direction thereof, the heat conducting fin is provided with a dovetail block, and the dovetail block is arranged in the dovetail groove and can move up and down along the dovetail groove.

Further, the casing is provided with a plurality of T-shaped grooves along the circumferential direction, the heat conducting fin is provided with T-shaped blocks, and the T-shaped blocks are arranged in the T-shaped grooves and can move up and down along the T-shaped grooves.

Further, one end of the heat conducting fin, which is close to the machine shell, protrudes downwards to form an arc-shaped block, the bottom surface of the heat conducting fin is attached to one end of the coil, and the arc-shaped block is attached to the inner wall of the machine shell.

Further, the plurality of heat conducting fins are connected end to end in sequence to form an annular heat conducting fin array.

Further, an insulating material is arranged on the contact surface between the heat conducting sheet and the coil.

Further, the structures of the plurality of heat conductive sheets are all the same.

The technical scheme adopted by the utility model for solving the technical problems is that the utility model also provides a motor, which comprises:

the end heat dissipation structure of the motor winding;

the front end cover and the rear end cover are respectively arranged at two ends of the shell.

Compared with the prior art, the utility model has at least the following beneficial effects:

in the utility model, the heat conducting fin array is arranged at one end of the shell and one end of the plurality of groups of coils, the heat conducting fin array comprises a plurality of heat conducting fins, the heat conducting fins are respectively contacted with the coils and the shell, and the heat generated by the coils is conducted to the shell to be dissipated through the heat conducting fins, so that the heat conduction coefficient of the winding end can be effectively improved, the heat of the winding end can be timely dissipated, the local overheating of the winding end is prevented, the heat dissipation structure is simple in structure, and the heat dissipation effect is good. In the manufacturing process of windings in the motor, the potential risk of inconsistent height exists, and the conducting strip in this conducting strip array sets up to the setting of the conducting strip burst, and the one end that is close to the coil sets up to the free end, adaptable inconsistent height's winding, and conducting strip and winding one-to-one can improve the area of contact of winding and conducting strip, and then improves the conducting efficiency of conducting strip, improves the radiating effect.

Drawings

FIG. 1 is a schematic illustration of an end heat dissipating structure of a motor winding of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural view of a coil and a heat conductive sheet;

FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;

fig. 5 is a schematic structural view of the motor of the present utility model.

In the figure:

1. a housing; 10. a dovetail groove;

2. a stator core;

3. a winding; 30. a coil;

4. an array of thermally conductive sheets; 40. a heat conductive sheet; 401. dovetail blocks; 402. an arc-shaped block;

5. a front end cover;

6. and a rear end cover.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Embodiment one:

as shown in fig. 1 to 4, an end heat dissipation structure of a motor winding mainly includes: a casing 1, a stator core 2, windings 3 and an array of thermally conductive sheets 4.

The stator core 2 and the winding 3 are both arranged in the casing 1, the casing 1 is in a cylindrical shape, the stator core 2 is in contact with the casing 1, and the stator core 2 is fixedly connected with the casing 1. The winding 3 includes a plurality of sets of coils 30, and a plurality of sets of the coils 30 are provided on the stator core 2 and are arranged along the circumferential direction of the stator core 2. The overall appearance of the stator core 2 is also cylindrical, and a plurality of groups of coils 30 are wound on the stator core 2 and are uniformly distributed along the circumferential direction of the stator core 2.

The heat conducting fin array 4 includes a plurality of heat conducting fins 40, a plurality of the heat conducting fins 40 are sequentially disposed between the casing 1 and the plurality of groups of coils 30, the heat conducting fins 40 are respectively in contact with one ends of the casing 1 and the coils 30, and the heat conducting fins 40 can conduct the heat of the coils 30 to the casing 1. Specifically, in this embodiment, the plurality of heat-conducting fins 40 and the plurality of coils 30 are in one-to-one correspondence, that is, the number of heat-conducting fins 40 is equal to the number of coils 30, one end of each coil 30 is provided with one heat-conducting fin 40, and the heat of the end of the coil 30 is conducted to the casing 1 through the heat-conducting fin 40 of the end of the coil 30, so as to be dissipated in time, thereby preventing local overheating.

The heat conducting fins 40 are sequentially connected end to form a ring-shaped heat conducting fin array 4, and the whole ring-shaped heat conducting fin array 4 can ensure sufficient contact area between the end of the coil 30 and the heat conducting fins 40, so as to improve heat conducting efficiency and heat dissipation effect. The heat conducting fin 40 is arranged horizontally, and the width of the heat conducting fin 40 is slightly wider than that of the coil 30, so that a large contact area is ensured. When each of the heat conductive sheets 40 is assembled, by applying a force in the axial direction, the contact area and uniformity of the heat conductive sheet 40 with the coil 30 are improved, and the contact effect of the heat conductive sheet array 4 with the winding 3 is improved.

An insulating material is provided on the contact surface between the heat conductive sheet 40 and the coil 30, and since the coil 30 needs to be energized during operation of the motor, an insulating material needs to be provided between the contact surfaces of the heat conductive sheet 40 and the coil 30 to avoid a risk of breakdown of the motor. And the insulating material is to ensure that the heat conduction sheet 40 does not affect the heat conduction of the end of the coil 30. The structure of each of the heat conductive sheets 40 is the same to improve interchangeability between the heat conductive sheets 40 and to reduce the difficulty of installation.

In the practical use process, the embodiment sets up the conducting strip array 4 in the one end of casing 1 and multiunit coil 30, and conducting strip array 4 includes a plurality of conducting strips 40, conducting strip 40 respectively with coil 30 and casing 1 contact, heat conduction that produces coil 30 is to casing 1 effluvium through conducting strip 40, can effectively improve the thermal conductivity of winding 3 tip, in time effluvium the heat of winding 3 tip, prevent its local overheated, can promote the motor winding 3 temperature distribution equilibrium degree in the axial, improve motor performance, and heat radiation structure's constitution is simple, and the radiating effect is good.

As shown in fig. 2 to 4, the heat conductive sheet 40 is connected to the casing 1 in the following manner: the heat conducting fin 40 is movably connected with the casing 1, and one end of the heat conducting fin 40 close to the coil 30 is a free end, so that the heat conducting fin can adapt to different heights of the coil 30. It should be explained that in the manufacturing process of the windings 3 in the motor, there is a potential risk of inconsistent height, the heat conducting fins 40 in the heat conducting fin array 4 are arranged in a split manner, one end close to the coil 30 is arranged as a free end, the heat conducting fins 40 can adapt to the windings 3 with inconsistent height, the heat conducting fins 40 are in one-to-one correspondence with the windings 3, the contact area between the windings 3 and the heat conducting fins 40 can be increased, the heat conducting efficiency of the heat conducting fins 40 is further improved, and the heat dissipation effect is improved.

Specifically, the movable connection manner of the heat conducting fin 40 and the casing 1 is: the casing 1 is provided with a plurality of dovetail grooves 10 along the circumferential direction thereof, the heat conducting fins 40 are provided with dovetail blocks 401, and the number of the dovetail blocks 401 on the plurality of heat conducting fins 40 is equal to that of the dovetail grooves 10, and the dovetail blocks are in one-to-one correspondence. The dovetail block 401 is disposed in the dovetail groove 10 and can move up and down along the dovetail groove 10, so as to ensure that the manufacturing height error of the coil 30 can be adapted, so as not to affect the heat conduction efficiency. Further, one end of the heat conducting fin 40 close to the casing 1 protrudes downwards to form an arc-shaped block 402, the dovetail block 401 is located on the arc-shaped block 402, the bottom surface of the heat conducting fin 40 is attached to one end of the coil 30, the arc-shaped block 402 is attached to the inner wall of the casing 1, the strength of the dovetail block 401 can be enhanced, the contact area between the heat conducting fin 40 and the casing 1 can be increased, and the heat conducting effect of the heat conducting fin 40 is improved.

Optionally, the movable connection manner of the heat conducting fin 40 and the casing 1 may be: the casing 1 is provided with a plurality of T-shaped grooves (not shown) along the circumferential direction thereof, and the heat conductive sheet 40 is provided with T-shaped blocks (not shown) which are disposed in the T-shaped grooves and can move up and down along the T-shaped grooves.

The casing 1 and the heat conducting strip 40 can ensure that the heat conducting strip 40 can move along the axial direction of the casing 1, namely, move up and down, and can not separate from the casing 1 along the radial direction of the casing 1 no matter in a matching mode of the dovetail groove 10 and the dovetail block 401 or in a matching mode of the T-shaped groove and the T-shaped block, so that the stability of the structure can be ensured.

Embodiment two:

as shown in fig. 1 and 5, an electric motor mainly includes: in the end heat dissipation structure of the motor winding of the first embodiment, a front end cover 5 and a rear end cover 6, the front end cover 5 and the rear end cover 6 are respectively covered at two ends of the casing 1.

In this scheme, this motor winding's tip heat radiation structure's radiating effect is good, and simple structure, with low costs.

Claims (10)

1. An end heat dissipation structure for a motor winding, comprising:

a housing;

a stator core and a winding disposed in the housing, the stator core being in contact with the housing; the winding comprises a plurality of groups of coils, and the plurality of groups of coils are arranged on the stator core and are distributed along the circumferential direction of the stator core;

the heat conducting fin array comprises a plurality of heat conducting fins, wherein the heat conducting fins are sequentially arranged between the machine shell and the plurality of groups of coils, the heat conducting fins are respectively contacted with the machine shell and one end of the coils, and the heat conducting fins can conduct the heat of the coils to the machine shell.

2. The end portion heat dissipation structure of motor windings according to claim 1, wherein a plurality of the heat conductive sheets are in one-to-one correspondence with a plurality of the coils, one end of each of the coils being provided with one of the heat conductive sheets.

3. The end heat dissipating structure of a motor winding of claim 1, wherein the heat conducting fin is movably connected to the housing, and an end of the heat conducting fin near the coil is a free end to accommodate different heights of the coil.

4. The heat dissipating structure for an end portion of a motor winding according to claim 1, wherein said housing is provided with a plurality of dovetail grooves along a circumferential direction thereof, said heat conductive sheet is provided with a dovetail block, and said dovetail block is provided in said dovetail groove and is movable up and down along said dovetail groove.

5. The end portion heat radiation structure of motor winding according to claim 1, wherein the housing is provided with a plurality of T-shaped grooves along a circumferential direction thereof, the heat conductive sheet is provided with T-shaped blocks, and the T-shaped blocks are provided in the T-shaped grooves and are movable up and down along the T-shaped grooves.

6. The heat dissipating structure of an end portion of a motor winding according to claim 1, wherein an end of said heat conducting fin adjacent to said housing protrudes downward by an arc-shaped block, a bottom surface of said heat conducting fin is attached to an end of said coil, and said arc-shaped block is attached to an inner wall of said housing.

7. The end heat dissipating structure of a motor winding of claim 1, wherein a plurality of said thermally conductive sheets are connected end to end in sequence to define an array of said thermally conductive sheets in a ring shape.

8. An end heat dissipating structure of a motor winding according to claim 1, wherein an insulating material is provided on a contact surface between the heat conductive sheet and the coil.

9. The end portion heat dissipation structure of a motor winding according to claim 1, wherein the structures of the plurality of heat conductive sheets are the same.

10. An electric machine, comprising:

an end heat dissipating structure for a motor winding according to any one of claims 1-9;

the front end cover and the rear end cover are respectively arranged at two ends of the shell.