CN219611501U

CN219611501U - Heat radiation structure and motor

Info

Publication number: CN219611501U
Application number: CN202320013526.8U
Authority: CN
Inventors: 鲁方春; 李文成; 尚健
Original assignee: Anhui Mingteng Permanent Magnetic Machinery & Electrical Equipment Co ltd; Beijing Mingcheng Technology Development Co ltd
Current assignee: Anhui Mingteng Permanent Magnetic Machinery & Electrical Equipment Co ltd; Beijing Mingcheng Technology Development Co ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-08-29
Anticipated expiration: 2033-01-04

Abstract

The utility model provides a heat dissipation structure and a motor, and belongs to the technical field of motor heat dissipation. This cooling mechanism is used for the motor, and the motor includes the casing and sets up the motor shaft in the inner chamber of casing, and cooling structure includes: a cooling liquid passage provided in the casing for circulating a cooling liquid; the hot air channel is arranged on the shell, an air inlet and an air outlet of the hot air channel are respectively communicated with the inner cavity of the shell, and hot air flowing in the hot air channel can exchange heat with cooling liquid flowing in the cooling liquid channel; the heat dissipation fan is fixed on the motor shaft and rotates synchronously with the motor shaft, so that hot air in the inner cavity of the shell is blown into the hot air channel through the air inlet and blown out from the air outlet. The motor can be cooled down rapidly through the heat radiation structure.

Description

Heat radiation structure and motor

Technical Field

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

Background

The permanent magnet motor is widely applied at present, and has the advantages of high efficiency, high power density and small motor volume compared with other motors. And the better the heat dissipation performance of the permanent magnet motor is, the higher the power density is, and the material cost is also lower. However, the existing permanent magnet motor mostly adopts the motor shell to cool down the interior of the permanent magnet motor by air cooling. The heat that produces in the permanent magnet motor mainly derives from stator and rotor, and stator production heat can direct transfer give the casing, and the rotor production heat can make the whole temperature of inner chamber of casing rise, adopts shell forced air cooling mode to be difficult to thoroughly cool down permanent magnet motor's inside, and cooling efficiency is low.

Disclosure of Invention

In view of the foregoing problems of the prior art, an object of an embodiment of the present utility model is to provide a heat dissipation structure capable of effectively cooling an interior of a motor, and the motor.

The technical scheme adopted by the embodiment of the utility model is as follows:

a heat radiation structure for on the motor, the motor includes the casing and sets up the motor shaft in the inner chamber of casing, its characterized in that, heat radiation structure includes:

a cooling liquid passage provided in the casing for circulating a cooling liquid;

the hot air channel is arranged on the shell, an air inlet and an air outlet of the hot air channel are respectively communicated with the inner cavity of the shell, and hot air flowing in the hot air channel can exchange heat with cooling liquid flowing in the cooling liquid channel;

the heat dissipation fan is fixed on the motor shaft and rotates synchronously with the motor shaft, so that hot air in the inner cavity of the shell is blown into the hot air channel through the air inlet and blown out from the air outlet.

Further, the heat dissipation structure further includes:

and the radiating fin is arranged in the hot air channel and is used for absorbing heat of the hot air and directly or indirectly transmitting the absorbed heat to the cooling liquid flowing in the cooling liquid channel.

Further, the casing includes:

the outer peripheral wall of the inner cylinder is provided with a flow passage;

and the outer cylinder is sleeved on the inner cylinder and is used for sealing the flow channel to form the cooling liquid channel.

Further, the outer cylinder is provided with a cooling liquid inlet and a cooling liquid outlet which are respectively communicated with the cooling liquid channel.

Further, the outer peripheral wall of the outer cylinder protrudes outwards to form a plurality of convex cavities which extend along the axial direction of the outer cylinder respectively, and the inner part of each convex cavity is provided with one hot air channel respectively.

Further, a plurality of partition plates are arranged on the outer peripheral wall of the inner cylinder at intervals around the circumference of the inner cylinder, each partition plate extends along the axial direction of the inner cylinder, and two adjacent partition plates, the outer peripheral wall of the inner cylinder and the inner peripheral wall of the outer cylinder form a cooling liquid channel.

Further, the surface of the portion of the outer peripheral wall of the inner cylinder located between the adjacent two of the partition plates is provided with a plurality of grooves extending in the axial direction of the inner cylinder, respectively.

Further, a rotor is arranged on the motor shaft, a heat dissipation channel is arranged on the rotor, the heat dissipation channel penetrates through two ends of the rotor along the axial direction of the motor shaft, and the heat dissipation channel and the hot air channel form a circulating air path.

Further, the heat dissipation fan includes:

the outer cover is arranged outside the inner cover and encloses a conical cavity with the inner cover, one end of the conical cavity is open and opposite to the heat dissipation channel on the rotor, and the other end of the conical cavity is open and opposite to the air inlet of the hot air channel;

the fan blades are respectively arranged in the conical cavity and distributed around the circumference of the conical cavity.

The motor comprises a shell and a motor shaft arranged in an inner cavity of the shell, and is characterized by further comprising the heat dissipation structure of any embodiment.

Compared with the prior art, the embodiment of the utility model has the beneficial effects that:

the heat radiation structure provided by the utility model can cool the shell through the cooling liquid in the cooling liquid channel on the shell. Meanwhile, the cooling liquid in the cooling liquid channel can cool the hot air flowing in the hot air channel, and the cooled hot air can return to the inner cavity of the shell again to cool the rotor and the inner cavity of the shell after forming cold air. The heat radiation structure improves the heat radiation capability of the motor, can reduce the volume of the motor, effectively balances the temperature in the motor cavity, and improves the heat radiation level of the motor rotor.

Drawings

Fig. 1 is a front cross-sectional view of a motor equipped with a heat dissipation structure according to an embodiment of the present utility model, wherein hollow arrows in the drawing indicate air flow directions, and solid arrows in the drawing indicate coolant flow directions;

fig. 2 is a side sectional view of a motor equipped with a heat dissipation structure according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a half-section of a chassis according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of an assembly structure of a motor shaft and a heat dissipating fan according to an embodiment of the present utility model.

In the figure: 1-a motor shaft; 2-a casing; 20-an outer cylinder; 21-an inner cylinder; 3-a cooling liquid channel; 4-a hot air channel; 40-an air inlet; 41-an air outlet; 5-a heat dissipation fan; 51-an outer cover; 52-an inner cover; 53-fan blades; 6-radiating fins; 7-grooves; 8-channel; 9-a separator; 10-rotor; 11-a front end cap; 12-a rear end cap; 13-convex cavity; 14-lumen.

Detailed Description

In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components thereof have been omitted.

The embodiment of the utility model provides a heat dissipation structure applied to a motor, and as shown in fig. 1 and 2, the motor comprises a casing 2 and a motor shaft 1 arranged in an inner cavity 14 of the casing 2.

The heat dissipation structure of the present embodiment includes a cooling liquid passage 3, a hot air passage 4, and a heat dissipation fan 5. The hot air channel 4 and the cooling liquid channel 3 are respectively arranged on the casing 2, the cooling liquid channel 3 is used for circulating cooling liquid to cool the whole casing 2, the hot air channel 4 is used for circulating hot air, the air inlet 40 and the air outlet 41 of the hot air channel 4 are respectively communicated with the inner cavity 14 of the casing 2, and the hot air entering the hot air channel 4 can exchange heat with the cooling liquid circulating in the cooling liquid channel 3 to form cold air.

The cooling liquid flowing in the cooling liquid channel 3 of the present embodiment may be cooling water or another cooling medium capable of easily exchanging heat, and the present utility model is not limited thereto.

Further, the heat dissipation fan 5 is fixed on the motor shaft 1, when the motor shaft 1 rotates, the heat dissipation fan 5 can be driven to synchronously rotate, when the heat dissipation fan 5 rotates, heat generated in the machine shell 2 can be changed into hot air, the hot air is blown into the hot air channel 4 through the air inlet 40, and cold air is formed after the hot air is cooled through cooling liquid in the cooling liquid channel 3 and is blown out from the air outlet 41 to cool the inner cavity 14 of the machine shell 2.

The heat dissipation structure provided in this embodiment can cool the casing 2 through the cooling liquid in the cooling liquid channel 3 on the casing 2. Meanwhile, the cooling liquid in the cooling liquid channel 3 can cool the hot air flowing in the hot air channel 4, and the cooled hot air can return to the inner cavity 14 of the casing 2 again after forming cold air so as to cool the inner cavity 14 of the casing 2, the rotor 10 and the like. The heat radiation structure improves the heat radiation capability of the motor, can reduce the volume of the motor, effectively balances the temperature in the motor cavity, and improves the heat radiation level of the rotor 10 on the motor.

In some embodiments, as shown in fig. 2 and 3, the casing 2 of the motor includes two parts, an inner cylinder 21 and an outer cylinder 20, and the outer cylinder 20 is sleeved on the inner cylinder 21 and forms an inner cavity 14 of the casing 2 with the front end cover 11 and the rear end cover 12 at two ends of the casing 2, see fig. 1.

The inner peripheral wall of the inner tube 21 forms the inner peripheral wall of the casing 2, and the stator of the motor is fixed to the inner peripheral wall of the inner tube 21. The outer peripheral wall of the inner cylinder 21 is provided with a flow passage, the outer cylinder 20 is sleeved on the inner cylinder 21 and is used for sealing the flow passage on the inner cylinder 21 to form the cooling liquid channel 3, and the cooling liquid channel 3 is simple in structure and convenient to assemble.

Preferably, the flow passage on the inner cylinder 21 of the present embodiment is distributed over the entire peripheral wall thereof, so that the housing 2 can be cooled down entirely.

To facilitate injection of the coolant into the coolant channel 3, in some embodiments, the outer cylinder 20 of the housing 2 is provided with a coolant inlet and a coolant outlet that are in communication with the coolant channel 3, and the coolant inlet and the coolant outlet may be connected to a coolant circulation line outside the motor, and the coolant circulation line may be connected to a cooling device to cool the coolant flowing in the pipe again. In this way, the cooling liquid absorbs heat to warm the hot air in the casing 2 and the hot air channel 4 in the cooling liquid channel 3, flows out from the cooling liquid outlet, can be cooled again by the cooling device, and flows back into the cooling liquid channel 3 for reuse.

In some embodiments, as shown in fig. 2 and 3, a plurality of baffles 9 are welded on the outer peripheral wall of the inner cylinder 21 at intervals around the circumference thereof, each baffle 9 extends along the axial direction of the inner cylinder 21, and two adjacent baffles 9 form a cooling liquid channel 3 with the outer peripheral wall of the inner cylinder 21 and the inner peripheral wall of the outer cylinder 20.

In this embodiment, if M partition plates 9 are provided at intervals on the outer peripheral wall of the inner tube 21, M-1 cooling liquid passages 3 are formed. In some embodiments, the M-1 coolant channels 3 are in communication with each other, so that only one coolant inlet and one coolant outlet may be provided on the outer tub 20.

There are various ways in which the M-1 coolant passages 3 of the present embodiment communicate with each other, for example, each partition 9 is provided with a through hole that communicates with the coolant passages 3 on both sides thereof; or, the ends of the M partition plates 9 are alternately flush with the end surfaces of the two ends of the inner cylinder 21 to form an S-shaped cooling liquid channel 3, and the flow time of the cooling liquid in the S-shaped cooling liquid channel 3 can be increased to ensure the cooling effect on the casing 2.

In some embodiments, as shown in fig. 3, four convex cavities 13 are provided on the outer peripheral wall of the outer barrel 20, each convex cavity 13 forms a hot air channel 4, and the convex cavity 13 is separated from the cooling liquid channel 3 by the inner peripheral wall of the outer barrel 20, so that the cooling liquid in the cooling liquid channel 3 can exchange heat with the shell 2 and simultaneously exchange heat with the hot air flowing in the convex cavity 13 on the outer barrel 20.

Preferably, the portion of each convex cavity 13 corresponding to the inner peripheral wall of the outer cylinder 20 in this embodiment is as thin as possible, so that the efficiency of cooling the hot air in the hot air passage 4 with the cooling liquid can be improved.

Alternatively, four protruding chambers 13 of the present embodiment are disposed around the circumference of the outer cylinder 20, each protruding chamber 13 extends along the axial direction of the outer cylinder 20, two ends of the protruding chamber 13 are correspondingly communicated with two ends of the inner chamber 14 of the casing 2, and the positions where the two ends of the protruding chamber 13 are communicated with the inner chamber 14 of the casing 2 form the air inlet 40 and the air outlet 41, respectively. When the heat dissipation fan 5 fixed on the motor shaft 1 rotates, hot air can be blown into the convex cavities 13 respectively, so as to improve the cooling speed of the inner cavity 14 of the machine shell 2.

It should be noted that, the convex cavity 13 or the hot air channel 4 in this embodiment only shows four, and the specific number thereof may be determined according to the overall size of the motor.

In some embodiments, as shown in fig. 2, a plurality of cooling fins 6 are further disposed in the hot air channel 4, each cooling fin 6 also extends along the axial direction of the outer cylinder 20, and the cooling fins 6 are respectively fixed on the bottom surface of the hot air channel 4, and the cooling fins 6 can absorb heat of hot air and directly or indirectly transfer the absorbed heat to the cooling liquid flowing in the cooling liquid channel 3. The heat sink 6 may be a conventional aluminum fin.

In some embodiments, as shown in fig. 2, the surface of the portion of the outer peripheral wall of the inner tube 21 located between the adjacent two of the partition plates 9 is provided with a plurality of grooves 7 extending in the axial direction of the inner tube 21, respectively, that is, the cooling liquid flowing into each cooling liquid channel 3 can flow into these grooves 7 again, so that the contact area of the cooling liquid with the outer peripheral wall of the inner tube 21 can be increased, thereby performing heat exchange with the inner tube 21 better.

Of course, in other embodiments, the grooves 7 on the inner barrel 21 may be replaced by some relief. For example, the surface of the outer peripheral wall of the inner tube 21 may be uneven instead of flat, so that the contact area of the cooling liquid with the inner tube 21 can be increased.

In some embodiments, as shown in fig. 2 and 4, a rotor 10 is disposed on a motor shaft 1, a plurality of heat dissipation channels 8 are disposed on a circumference of the rotor 10, each heat dissipation channel 8 penetrates through two ends of the rotor 10, the heat dissipation channels 8 and the hot air channels 4 on the casing 2 form a circulating air path, see fig. 1, and hollow arrows in the figures are air circulation directions. When the heat dissipation fan 5 rotates, hot air generated by the heat dissipation fan enters the hot air channel 4 from the air inlet 40 to form cold air, and the cold air passes through the heat dissipation channel 8 after exiting from the air outlet 41 to absorb heat to the rotor 10 to cool the rotor.

In some embodiments, as shown in fig. 4, the heat dissipation fan 5 is fixed on one side of the rotor 10 on the motor shaft 1 and is disposed near the air inlet 40 in the hot air channel 4, and when the heat dissipation fan 5 rotates, heat in the inner cavity 14 of the casing 2 and the heat dissipation channel 8 on the rotor 10 can be blown into the hot air channel 4 from the air inlet 40 in the form of hot air.

In some embodiments, as shown in fig. 4, the heat dissipation fan 5 mainly includes a cover body and fan blades 53 disposed in the cover body. The cover body comprises an outer cover 51 and an inner cover 52, and the outer shape of the outer cover 51 and the outer shape of the inner cover 52 are conical. The outer cover 51 is covered outside the inner cover 52 to form a cone-shaped cover body, and the outer cover 51 and the inner cover 52 enclose a cone-shaped cavity. The plurality of fan blades 53 are disposed in the tapered cavity, respectively, and are distributed around the circumference of the tapered cavity.

In this embodiment, one end of the conical cavity is open and opposite to the heat dissipation channel 8 on the rotor 10, and the other end is open and opposite to the air inlet 40 of the hot air channel 4, so that when the heat dissipation fan 5 rotates, heat in the heat dissipation channel 8 on the rotor 10 can be blown into the hot air channel 4 in a hot air mode.

The embodiment of the utility model also provides a motor, as shown in fig. 1, which comprises a casing 2, a motor shaft 1, a front end cover 11 and a rear end cover 12 fixed at two ends of the casing 2, wherein the casing 2, the front end cover 11 and the rear end cover 12 form an inner cavity 14 of the motor, and two ends of the motor shaft 1 are respectively fixed on the casing 2 through bearings, and the motor further comprises a heat dissipation structure according to any one of the embodiments.

The motor of this embodiment may be a permanent magnet motor, and the heat of the permanent magnet motor is mainly generated by copper loss and iron loss of the stator on the casing 2 and loss of the rotor 10 on the motor shaft 1, where the loss of the rotor 10 is small. The heat generated by the stator losses is conducted to the housing 2 of the motor. Therefore, the cooling liquid flowing in the cooling liquid channel 3 of the embodiment can quickly cool the casing 2 so as to take away the heat generated by the stator, and the motor power can be designed to be larger by matching with the electromagnetic design of the permanent magnet motor.

The heating of the rotor 10 on the motor shaft 1 mainly comes from stator heat radiation, stray loss of the rotor 10, magnetic steel eddy current consumption and the like, and the higher the temperature of the rotor 10 is, the smaller the anti-demagnetizing current of the permanent magnet on the rotor 10 is. Therefore, the temperature of the rotor 10 is reduced in order to improve the anti-demagnetization capability of the permanent magnets on the rotor 10 without improving the magnetic steel mark. The hot air channel 4 of the embodiment well solves the heat dissipation problem of the rotor 10, reduces the temperature of the permanent magnet, and improves the anti-demagnetization capability of the permanent magnet motor. Meanwhile, the heat dissipation of the end part of the stator winding is improved, the temperature in the motor cavity is balanced, and the problem of overhigh local temperature is avoided.

The above description is intended to be illustrative and not limiting, and variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present disclosure. Also, the above examples (or one or more aspects thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations.

Claims

1. A heat radiation structure for on the motor, the motor includes the casing and sets up the motor shaft in the inner chamber of casing, its characterized in that, heat radiation structure includes:

2. The heat dissipating structure of claim 1, further comprising:

and the cooling fin is arranged in the hot air channel and is used for absorbing heat of hot air and directly or indirectly transmitting the absorbed heat to the cooling liquid flowing in the cooling liquid channel.

3. The heat dissipating structure of claim 1, wherein said housing comprises:

4. A heat dissipating structure according to claim 3, wherein said outer cylinder is provided with a coolant inlet and a coolant outlet communicating with said coolant passages, respectively.

5. A heat radiation structure as claimed in claim 3, wherein said outer peripheral wall of said outer cylinder is outwardly projected to form a plurality of convex chambers extending in an axial direction of said outer cylinder, respectively, and an interior of each of said convex chambers is formed with one of said hot air passages, respectively.

6. A heat dissipating structure according to claim 3, wherein a plurality of partitions are provided on the outer peripheral wall of said inner cylinder at intervals around the circumference thereof, each of said partitions extending in the axial direction of said inner cylinder, respectively, and two adjacent partitions form one of said coolant passages with the outer peripheral wall of said inner cylinder and the inner peripheral wall of said outer cylinder.

7. A heat dissipating structure as set forth in claim 6, wherein the surface of the portion of the outer peripheral wall of said inner tube located between adjacent ones of said partitions is provided with a plurality of grooves extending in the axial direction of said inner tube, respectively.

8. The heat dissipation structure as set forth in claim 1, wherein a rotor is provided on the motor shaft, a heat dissipation passage is provided on the rotor, the heat dissipation passage penetrates through both ends of the rotor in the axial direction of the motor shaft, and the heat dissipation passage and the hot air passage form a circulation air path.

9. The heat dissipating structure of claim 8, wherein said heat dissipating fan comprises:

10. An electric motor comprising a housing and a motor shaft disposed in an interior cavity of the housing, the electric motor further comprising a heat dissipating structure as set forth in any one of claims 1-9.