Heat dissipation mechanism of air-cooled motor and air-cooled motor thereof

Abstract

The utility model discloses a heat dissipation mechanism of an air cooling motor and the air cooling motor thereof, the heat dissipation mechanism is distributed on the outer circumference of a motor housing, and the heat dissipation mechanism is provided with fins which are distributed along the circumferential direction of the motor housing and are vertically arranged on the outer circumference of the motor housing. Wherein the fins are equally divided into N sections in the axial direction of the motor shell, and every two adjacent sections of fins are arranged in a staggered mode in the air; the included angle formed by every two adjacent fins in each section ranges from 20 degrees to 40 degrees. The included angle with a certain angle is formed between every two adjacent fins, the air flowing path can be changed, the time and distance for air to flow through the surfaces of the fins are prolonged, and therefore the heat exchange efficiency is improved. Meanwhile, two adjacent sections of fins are arranged in a staggered manner to the air, so that more interference and eddy current can be created in the airflow, the airflow can be more uniformly distributed on the whole heat dissipation mechanism, local hot spots are avoided, and the overall temperature uniformity of the air cooling motor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of the heat dissipation structure of an air-cooled motor, in particular to a heat dissipation mechanism of an air-cooled motor and the air-cooled motor thereof. Background Art

[0002] In the design of the heat dissipation fins of the existing air-cooled motors of new energy vehicles, a generally adopted distribution method is a parallel straight row arrangement.

[0003] On the one hand, this method makes the heat dissipation area relatively fixed to a certain extent and is difficult to be adjusted greatly according to actual needs. Especially in application scenarios with high power output or high heat density, this fixed heat dissipation area may not provide sufficient cooling efficiency, resulting in the unqualified heat dissipation efficiency of the motor and affecting the performance and service life of the equipment.

[0004] On the other hand, the aerodynamics between the fins is also an important factor affecting the heat dissipation performance. The parallel straight fins will limit the freedom of air flow, reduce the contact area and time between the air and the fins, and thus reduce the efficiency of convective heat transfer.

[0005] In addition, in the thermal management of the air-cooled motor, the contact thermal resistance between the fins and the heat source (such as the motor winding) and the thermal resistance of the fins themselves are also key factors affecting the heat transfer efficiency. If the design of the fins fails to optimize these thermal resistances, for example, the contact area between the fins and the heat source is insufficient or the thermal conductivity of the fin material is poor, a phenomenon of heat accumulation will occur inside the fins. This heat accumulation not only reduces the heat dissipation effect of the fins but also may cause the overall temperature of the motor to rise, further affecting the efficiency and reliability of the motor. Content of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides a heat dissipation mechanism of an air-cooled motor. The heat dissipation mechanism is distributed on the outer circumference of the motor housing. The heat dissipation mechanism has fins that are circumferentially distributed along the motor housing and are erected on the outer circumference of the motor housing, wherein:

[0007] The fins are equally divided into N segments along the axial direction of the motor housing, and adjacent two segments of the fins are arranged in a staggered manner with respect to the voids;

[0008] The included angle formed by adjacent two fins in each segment is 20° - 40°.

[0009] Furthermore, the fins are linear along the axial direction of the motor housing.

[0010] Furthermore, the fins are equally divided into three segments along the axial direction of the motor housing, and are sequentially denoted as the first segment of fins, the second segment of fins, and the third segment of fins.

[0011] Further, the leading end and the trailing end of the second-stage fins are respectively located on the same circular line as the trailing end of the first-stage fins and the leading end of the third-stage fins.

[0012] Further, the adjacent fins in each stage enclose a U-shaped groove with a gradually increasing opening diameter.

[0013] Further, the included angle formed by two adjacent fins in each stage is 30°.

[0014] An air-cooled motor, applied to a new energy vehicle, includes a motor housing, and a heat dissipation mechanism of the air-cooled motor is arranged on the outer circumference of the motor housing.

[0015] Further, fixing ribs are arranged along the axial direction of the motor housing, and the fixing ribs evenly divide the heat dissipation mechanism along the circumferential direction of the motor housing.

[0016] Further, threaded holes are arranged on the end face of the fixing ribs, and the motor housing is fixed to the vehicle by screws cooperating with the threaded holes.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] By forming a certain included angle between two adjacent fins, the utility model can change the path of air flow, increase the time and distance of air flowing through the fin surface, thereby improving the heat exchange efficiency; at the same time, by arranging adjacent two-stage fins in a staggered manner, more disturbances and vortices can be created in the air flow, which helps to make the air flow more evenly distributed on the entire heat dissipation mechanism, thereby avoiding the generation of local hot spots and ensuring the overall temperature uniformity of the air-cooled motor. Description of the Drawings

[0019] Figure 1 It is an axonometric view of the overall structure disclosed in the embodiment of the utility model;

[0020] Figure 2 It is a side view of the overall structure disclosed in the embodiment of the utility model;

[0021] Figure 3 It is a top view of the overall structure disclosed in the embodiment of the utility model.

[0022] In the figure: 10, fins; 11, first-stage fins; 12, second-stage fins; 13, third-stage fins; 20, fixing ribs. Detailed Embodiment

[0023] To make the technical solutions and technical effects of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0024] The present utility model aims to provide a heat dissipation mechanism for an air-cooled motor with higher heat dissipation efficiency. Referring to Figures 1-3 , the heat dissipation mechanism is distributed on the outer circumference of the motor housing. Further, the heat dissipation mechanism has fins 10 that are circumferentially distributed along the motor housing and are erected on the outer circumference of the motor housing, and the fins 10 are linearly arranged along the axial direction of the motor housing. The following specifically introduces the distribution optimization of the fins 10:

[0025] The fins 10 are equally divided into N segments along the axial direction of the motor housing, and adjacent two segments of fins 10 are arranged in a staggered manner with a space in between. Preferably, along the axial direction of the motor housing, the length of the fins 10 is equally divided into three segments, which are sequentially denoted as the first segment of fins 11, the second segment of fins 12, and the third segment of fins 13. Further, the leading end and the trailing end of the second segment of fins 12 are respectively located on the same circular line as the trailing end of the first segment of fins 11 and the leading end of the third segment of fins 13. That is, along the axial direction of the motor housing, the trailing end of the first segment of fins and the leading end of the second segment of fins are on the same circular line; the trailing end of the second segment of fins and the leading end of the third segment of fins are on the same circular line. The fins 10 are arranged in a staggered manner with a space in between, which can create more disturbances and vortices in the air flow. These disturbances and vortices help to break the boundary layer of the air flow, reduce the thermal resistance, and improve the heat transfer efficiency; in addition, the staggered fins 10 help to make the air flow more evenly distributed on the entire heat dissipation mechanism, thereby avoiding the generation of local hot spots and ensuring the overall uniformity of the temperature of the air-cooled motor.

[0026] Adjacent fins 10 in each segment enclose a U-shaped groove with a gradually increasing opening diameter. Further, the included angle formed by adjacent two fins 10 in each segment is 20° - 40°, and preferably, the included angle formed by adjacent two fins 10 in each segment is 30°. Such an angle design can change the path of the air flow, increase the time and distance of the air flowing through the fin surface, and thus improve the heat exchange efficiency.

[0027] In order to evaluate the influence of the design of the heat dissipation fins 10 of the air-cooled motor housing on the heat dissipation performance of the motor, especially the effect of the included angle of the fins 10 on the heat dissipation effect, the present utility model has carried out a series of thermal simulation experiments, as described below:

[0028] Experimental conditions: ambient temperature 65°C, wind speed 4 m / s, air-cooled motor speed 2604 / rpm, air-cooled motor torque 110 / Nm, air-cooled motor power 60 kW, time 30 s.

[0029] Experimental procedure: Use computational fluid dynamics software to establish a detailed three-dimensional model of the motor housing and heat dissipation fins, and perform mesh division on this model to ensure sufficient fineness to capture the temperature gradient and airflow changes near the fin 10; keep other variables unchanged, only change the fin angle, and set the fin angles of fin 10 to 20°, 25°, 30°, 35°, and 40° respectively for steady-state and transient simulations to observe its impact on the heat dissipation performance.

[0030] Experimental results: As shown in the following table,

[0031] Fin angle 20° 25° 30° 35° 40° Motor temperature 60℃ 57℃ 55℃ 58℃ 62℃

[0032] According to the temperature contour map after the experiment, it is found that when the fin angle of fin 10 is 20° - 40°, compared with before the optimization of fin 10, the motor temperature drops by 8 - 10°C; among them, when the fin angle of fin 10 is 30°, the heat dissipation performance is the best.

[0033] The present utility model also discloses an air-cooled motor applied to new energy vehicles, including a motor housing, and the outer circumference of the motor housing is provided with the above-mentioned heat dissipation mechanism.

[0034] In addition, fixing ribs 20 are arranged along the axial direction of the motor housing, and the fixing ribs 20 evenly divide the heat dissipation mechanism along the circumferential direction of the motor housing. Threaded holes are provided on the end faces of the fixing ribs 20, and the motor housing is fixed to the vehicle by screws cooperating with the threaded holes.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation mechanism for an air-cooled motor, the heat dissipation mechanism being distributed on the outer circumference of the motor housing, characterized in that, The heat dissipation mechanism has fins (10) that are circumferentially distributed along the motor housing and vertically arranged on the outer circumference of the motor housing, where: The fins (10) are equally divided into N segments along the axial direction of the motor housing, and adjacent two segments of the fins (10) are arranged staggered. The included angle formed by adjacent two fins (10) in each segment is 20° - 40°.

2. The heat dissipation mechanism of the air-cooled motor according to claim 1, characterized in that, The fins (10) are linear along the axial direction of the motor housing.

3. The heat dissipation mechanism of the air-cooled motor according to claim 1, characterized in that, The fins (10) are equally divided into three segments along the axial direction of the motor housing, and are sequentially denoted as the first segment of fins (11), the second segment of fins (12), and the third segment of fins (13).

4. The heat dissipation mechanism of the air-cooled motor according to claim 3, characterized in that, The leading end and the trailing end of the second segment of fins (12) are respectively located on the same circular line as the trailing end of the first segment of fins (11) and the leading end of the third segment of fins (13).

5. The heat dissipation mechanism of the air-cooled motor according to claim 1, characterized in that, Adjacent fins (10) in each segment enclose a U-shaped groove with a gradually increasing opening diameter.

6. The heat dissipation mechanism of the air-cooled motor according to claim 1, characterized in that, The included angle formed by adjacent two fins (10) in each segment is 30°.

7. An air-cooled motor, applied to new energy vehicles, is characterized in that, It includes a motor housing, and a heat dissipation mechanism of the air-cooled motor described in any one of claims 1 - 6 is provided on the outer circumference of the motor housing.

8. The air-cooled motor according to claim 7, wherein Fixing ribs (20) are arranged along the axial direction of the motor housing, and the heat dissipation mechanism is evenly divided along the circumferential direction of the motor housing by the fixing ribs (20).

9. The air-cooled motor according to claim 8, wherein Threaded holes are provided on the end faces of the fixing ribs (20), and the motor housing is fixed to the vehicle by screws cooperating with the threaded holes.

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