CN219627518U - Motor heat radiation structure based on epitaxial medium - Google Patents

Abstract

The utility model relates to a motor heat radiation structure based on an epitaxial medium, which comprises a liquid cooling shell, a stator core, a copper wire winding, a front cover and one or more refrigerant conduits, wherein the stator core is arranged in the liquid cooling shell, the front cover covers the front end of the liquid cooling shell so that the stator core is fixed in the liquid cooling shell, the copper wire winding is overhung at the end part of the stator core and extends through the front cover, the refrigerant conduits are annularly arranged on the outer surface of the copper wire winding, the refrigerant conduits are respectively attached to the copper wire winding and the front cover, and an outlet part, an inlet part, a bending part, a surrounding part and an end part are respectively arranged on the refrigerant conduits. The utility model can obviously improve the heat dissipation condition of the internal winding of the liquid-cooled motor, reduce the temperature of the motor winding, promote the overload operation multiple of the motor and realize the miniaturization and high power density of the motor.

Description

Motor heat radiation structure based on epitaxial medium

Technical Field

The utility model relates to the technical field of motor heat dissipation, in particular to a motor heat dissipation structure based on an epitaxial medium.

Background

The new energy automobile industry has extremely high requirements on the selection of the motor, for the motor, the temperature is a key factor limiting the performance of the motor, the excessive temperature can lead to the change of the mechanical performance of metal parts, the increase of the internal resistance of windings and the aging of sealing parts, and more serious conditions can lead to the loss of the magnetism of permanent magnet materials and the burning of insulating paint on the surfaces of the windings, so that the motor is permanently damaged. Therefore, the temperature rising characteristic and the temperature distribution of the motor need to be analyzed, so that an effective thermal management scheme is reasonably designed, heat is timely conducted to the outside of the system, the negative influence of temperature on the motor performance is reduced, and the aim of improving the motor performance is fulfilled.

The existing liquid cooling can only realize the heat dissipation of the winding of the wrapping part of the stator core. Copper wire windings exposed outside the iron core are the most serious parts of heat generation in the motor, and are generally immersed in solidified heat-conducting glue, and the windings are required to transfer heat to the heat-conducting glue first and then to the liquid cooling machine shell through the heat-conducting glue. Because the potting heat-conducting glue is filled in the motor, gaps are easy to generate, the heat conduction efficiency is reduced, the heat dissipation path cannot conduct efficient heat dissipation on the outer winding of the iron core, and the temperature of the part of copper wires becomes an important index for measuring whether the motor reaches the protection temperature.

Therefore, how to reduce the winding temperature has important significance for realizing the efficient heat dissipation and power improvement of the liquid cooling motor.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a motor heat dissipation structure based on an extension medium, which remarkably improves the heat dissipation condition of an internal winding of a liquid cooling motor and improves the service power of the motor.

The utility model provides a motor heat dissipation structure based on an epitaxial medium, which comprises a liquid cooling shell, a stator core, a copper wire winding, a front cover and one or more refrigerant conduits, wherein the stator core is arranged in the liquid cooling shell, the front cover covers the front end of the liquid cooling shell so that the stator core is fixed in the liquid cooling shell, the copper wire winding is overhung at the end part of the stator core and extends through the front cover, the refrigerant conduits are annularly arranged on the outer surface of the copper wire winding and respectively attached to the copper wire winding and the front cover, and outlet parts, inlet parts, bending parts, surrounding parts and end parts are respectively arranged on the refrigerant conduits.

In one embodiment of the present utility model, the front cover end is respectively provided with a positioning groove matched with the outlet part and the inlet part, and the positioning grooves are used for positioning and assembling the refrigerant conduit during installation.

In one embodiment of the present utility model, the bending portion is disposed at the ends of the outlet portion and the inlet portion, and is used for vertically attaching to the edge of the front cover.

In one embodiment of the present utility model, the end portion has a U-shaped structure, and is used for connecting adjacent surrounding portions, and the bent portions of the end portion may be disposed perpendicular to each other.

In one embodiment of the present utility model, the surrounding portion is connected through the end portion, so that the refrigerant conduit surrounds the copper wire winding to form a ring with at least one turn.

In one embodiment of the present utility model, the cross section of the refrigerant conduit is circular, and a refrigerant is disposed in the refrigerant conduit, and the refrigerant sequentially passes through the inlet portion, the bending portion, the surrounding portion, and the end head portion to cool the copper wire winding, and then sequentially passes through the surrounding portion, the bending portion, and the outlet portion to flow into the liquid cooling enclosure.

Compared with the prior art, the utility model has the following advantages:

(1) According to the utility model, the refrigerant conduit is arranged on the surface of the copper wire winding in a surrounding manner, the cooling medium flowing in the refrigerant conduit is contacted with the copper wire winding serving as a heat source, and ohmic heat generated by the copper wire winding during operation is uniformly transferred from the copper wire winding to the cooling medium in the refrigerant conduit based on the characteristic of high heat conductivity of the cooling medium, so that the heat dissipation path is taken away.

(2) According to the utility model, the heat transfer device with low price and higher heat conductivity is used for filling the cavity between the windings, so that the potting amount of the heat conduction interface material is effectively reduced, and the heat dissipation cost of the motor is reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of an electric motor according to a first embodiment of the present utility model;

FIG. 2 is a three-dimensional exploded view of FIG. 1;

FIG. 3 is a schematic diagram of a medium conduit according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a coolant conduit according to an embodiment of the utility model;

fig. 5 is a schematic view of a front cover according to a first embodiment of the utility model.

The attached drawings are identified: 1. a refrigerant conduit; 2. a front cover; 21-a positioning groove; 3. copper wire windings; 4. a stator core; 5. a liquid-cooled housing; 6. an inlet portion; 7. an outlet portion; 8. a bending part; 9. a surrounding portion; 10. an end portion.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1 to 5, an embodiment of the utility model provides a motor heat dissipation structure based on an epitaxial medium, which comprises a liquid cooling shell 5, a stator core 4, a copper wire winding 3, a front cover 2 and one or more refrigerant conduits 1, wherein the stator core 4 is installed in the liquid cooling shell 5, the front cover 2 covers the front end of the liquid cooling shell 5 so that the stator core 4 is fixed in the liquid cooling shell 5, the copper wire winding 3 is overhung at the end of the stator core 4 and extends through the front cover 2, the refrigerant conduits 1 are annularly arranged on the outer surface of the copper wire winding 3, the refrigerant conduits 1 are respectively attached to the copper wire winding 3 and the front cover 2, and outlet portions 7, inlet portions 6, bending portions 8, surrounding portions 9 and end portions 10 are respectively arranged on the refrigerant conduits 1.

In this embodiment, the end portion of the front cover 2 is respectively provided with a positioning groove 21 adapted to the outlet portion 7 and the inlet portion 6, so that the refrigerant conduit 1 is positioned and assembled during installation, so that the efficiency of installing the refrigerant conduit 1 can be improved, and meanwhile, the refrigerant conduit 1 is ensured to be closely attached to the copper wire winding 3, so that the contact area is increased, and the heat conduction efficiency of the refrigerant conduit 1 is improved.

In this embodiment, the bending portion 8 is disposed at the ends of the outlet portion 7 and the inlet portion 6, and is configured to vertically attach to the edge of the front cover 2, so as to ensure that the refrigerant conduit 1 is attached to the front cover 2, and ensure stability of the refrigerant conduit 1 after being mounted.

In this embodiment, the end portion 10 has a U-shaped structure, and is configured to connect adjacent surrounding portions 9, and the bent portions of the end portion 10 may be perpendicular to each other, and the surrounding portions 9 are wound around the copper wire winding 3 through the end portion 10 to form a multi-turn refrigerant conduit 1, so that the total heat that can be taken away in a unit time of the refrigerant conduit 1 is further increased, and the heat dissipation efficiency is improved.

In this embodiment, the surrounding portion 9 is connected through the end portion 10, so that the refrigerant conduit 1 surrounds the copper wire winding 3 to form a ring with at least one turn, the surrounding portion 9 is wound around the copper wire winding 3 through the end portion 10 to form a multi-turn refrigerant conduit 1, the total heat taken away by the refrigerant conduit 1 in unit time is further increased, and the heat dissipation efficiency is improved

In this embodiment, the cross section of the refrigerant conduit 1 is circular, a refrigerant is disposed in the refrigerant conduit 1, and the refrigerant sequentially passes through the inlet portion 6, the bending portion 8, the surrounding portion 9 and the end head 10 to cool the copper wire winding 3, and then sequentially passes through the surrounding portion 9, the bending portion 8 and the outlet portion 7 to flow into the liquid cooling machine shell 5, and through the refrigerant conduit 1 which is arranged on the outer surface of the copper wire winding 3 in a winding manner, the amount of the refrigerant flowing through the copper wire winding 3 in the same time can be increased, and the heat dissipation efficiency is improved.

According to the utility model, the refrigerant conduit is arranged on the surface of the copper wire winding in a surrounding manner, the cooling medium flowing in the refrigerant conduit is contacted with the copper wire winding serving as a heat source, and ohmic heat generated by the copper wire winding during operation is uniformly transferred from the copper wire winding to the cooling medium in the refrigerant conduit based on the characteristic of high heat conductivity of the cooling medium, so that compared with a traditional motor cooling structure, the cooling path increases the contact area of a heat transfer device and the winding, obviously improves the cooling condition of the winding at the overhanging position, reduces the temperature of the motor winding, improves the rated use power of the motor, and realizes the weight reduction and microminiaturization of the motor.

Furthermore, the heat transfer device with low price and higher heat conductivity fills the cavity between the windings, so that the potting amount of the heat conduction interface material is effectively reduced, and the heat dissipation cost of the motor is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (6)

1. An epitaxial medium-based motor heat dissipation structure is characterized in that: including liquid cooling casing, stator core, copper line winding, protecgulum and one or more refrigerant pipe, stator core installs in the liquid cooling casing, the protecgulum lid in the liquid cooling casing front end, so that stator core is fixed in the liquid cooling casing, copper line winding overhang sets up in stator core's tip and extends through the protecgulum, the refrigerant pipe is annular and arranges in copper line winding surface, and refrigerant pipe laminating copper line winding and protecgulum set up respectively, be provided with outlet portion, inlet portion, kink, surrounding portion and end part on the refrigerant pipe respectively.

2. The epitaxial medium-based motor heat radiation structure according to claim 1, wherein the front cover end is respectively provided with a positioning groove matched with the outlet part and the inlet part for positioning and assembling the refrigerant conduit during installation.

3. The epitaxial media based motor heat dissipation structure of claim 1, wherein the bending portion is disposed at the ends of the outlet portion and the inlet portion for vertically attaching to the front cover edge.

4. The motor heat dissipation structure based on epitaxial media of claim 1, wherein the end portion has a U-shaped structure for connecting adjacent surrounding portions, and bending portions of the end portion are perpendicular to each other.

5. The epitaxial media based motor heat dissipation structure of claim 4, wherein the surrounding portion is connected via the end portion such that the coolant conduit surrounds the copper wire winding to form a ring of at least one turn.

6. The motor heat radiation structure based on extension medium as claimed in claim 1, wherein the cross section of the coolant conduit is circular, coolant is arranged in the coolant conduit, and the coolant sequentially passes through the inlet part, the bending part, the surrounding part and the end head part to cool the copper wire winding, and then sequentially passes through the surrounding part, the bending part and the outlet part to flow into the liquid cooling machine shell.