Fan cover for motor and motor

Abstract

The utility model provides a fan cover for a motor and the motor. The fan cover for the motor comprises a cover body. Along the axis of the fan cover for the motor, the cover body comprises an air inlet cylinder, an air guide cylinder and an air outlet cylinder which are sequentially connected, the inner diameter of the air inlet cylinder is gradually increased from the air inlet cylinder to the air guide cylinder, the inner diameter of the air guide cylinder is smaller than the inner diameter of the air outlet cylinder, and the air outlet cylinder is constructed to be installed on a motor shell. According to the technical scheme of the utility model, the problem that cooling air is difficult to effectively cool the motor due to a fan cover for the motor in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of motor cooling technology, and in particular to a fan cover for a motor and a motor. Background Technology

[0002] Motors generate a significant amount of heat during operation, making the efficiency of the cooling system crucial for ensuring motor stability and lifespan. Motor fans are a common cooling method, working by drawing cool air around the motor through fan rotation. However, current motor fan shroud designs have certain flaws that limit the effectiveness of cooling airflow.

[0003] In existing technologies, cooling air diffuses outwards after leaving the fan cover, making it difficult to effectively focus the cooling air on the heat source of the motor. This reduces cooling efficiency, which in turn reduces motor performance and shortens motor lifespan. Utility Model Content

[0004] In view of this, the present invention proposes a fan cover for an electric motor and an electric motor to solve the problem that the existing fan cover for an electric motor makes it difficult for cooling air to effectively cool the motor.

[0005] This utility model provides a fan cover for an electric motor. The fan cover includes a cover body. Along the axis of the fan cover, the cover body includes an air inlet duct, an air guide duct, and an air outlet duct connected in sequence. From the air inlet duct to the air guide duct, the inner diameter of the air inlet duct gradually increases, the inner diameter of the air guide duct is smaller than the inner diameter of the air outlet duct, and the air outlet duct is configured to be installed on the motor housing.

[0006] In this way, the exhaust duct is installed in the motor housing, allowing the cooling air to directly act on the motor body inside the housing. The larger inner diameter of the exhaust duct can accommodate more cooling air, increasing the overall cooling airflow. By adding an additional air guide duct with a smaller inner diameter than the exhaust duct, the air guide duct can block the diffused cooling air, guiding it to be delivered more concentratedly to the motor housing, reducing air diffusion and improving the cooling effect on the motor. This effectively improves the motor's heat dissipation efficiency, especially under long-term high-load operation, ensuring timely heat dissipation and preventing overheating, thereby improving the motor's stability and service life.

[0007] In a preferred embodiment, the difference between the inner diameter of the air outlet duct and the inner diameter of the air guide duct is greater than or equal to 3 mm and less than or equal to 5 mm.

[0008] In this way, when cooling air enters the air guide tube from the air inlet, the air velocity and air pressure will increase due to the small inner diameter of the air guide tube. When cooling air enters the air outlet tube, the air velocity will decrease due to the large inner diameter of the air outlet tube, but the air pressure will remain relatively high. This allows the cooling air to flow in a straight line at a higher air pressure, so that it blows more directly and concentratedly onto the motor body, thereby reducing the diffusion of cooling air and improving cooling efficiency.

[0009] In a preferred embodiment, the cover further includes a connecting cylinder, one end of which is connected to the air guide duct and the other end of which is connected to the air outlet duct. Along the axis of the motor fan cover, from the air guide duct to the air outlet duct, the inner diameter of the connecting cylinder gradually increases.

[0010] In this way, a stable connection can be achieved between the air guide duct and the air outlet duct, and the cooling air can be guided to flow smoothly from the air guide duct to the air outlet duct, thereby reducing the resistance of the cooling air from the air guide duct to the air outlet duct and thus improving the cooling efficiency of the motor.

[0011] In a preferred embodiment, a guide wall is provided on the periphery of the cover, and the guide wall is arranged parallel to the axis of the motor fan cover.

[0012] In this way, when the fan cover is installed on the motor housing, the guide wall is located at the bottom. In this way, the cooling air from the upper part and the left and right sides of the fan cover is changed in direction by the smaller diameter air guide tube, so that the airflow direction is slightly downward. The cooling air is also clamped by the guide wall at the bottom of the fan cover, which makes the cooling air less likely to diffuse and concentrates the air pressure, thereby improving the cooling effect of the cooling air on the motor body. Then the cooling air enters the larger diameter air outlet tube for integration. In this way, the cooling air will cool the motor body in a straight line, thereby improving the utilization efficiency of the cooling air.

[0013] In a preferred embodiment, the guide wall extends from the inlet of the air duct to the outlet of the air outlet.

[0014] In this way, the cooling air can be guided more effectively along a specific path to reduce the diffusion of the cooling air and thus improve the cooling effect of the cooling air on the motor body.

[0015] In a preferred embodiment, there is a distance B between the guide wall and the axis of the motor fan cover, and the outer diameter of the air outlet is D, where B = D / 2 - A, and A is greater than or equal to 4 mm and less than or equal to 5 mm.

[0016] In this way, through precise dimensional control, the optimal distance between the guide wall and the axis L of the motor fan cover can be ensured, thereby ensuring that the cooling air flows along a specific path while also ensuring the structural strength of the motor fan cover.

[0017] In a preferred embodiment, the inner diameter of the air inlet duct is smaller than the inner diameter of the air guide duct.

[0018] In this way, when the cooling air passes through the smaller air inlet, the wind speed increases. Subsequently, the air direction is guided at the air guide duct. Due to its larger inner diameter, the speed of the cooling air inside the air guide duct is slowed down, thereby increasing the air pressure. This allows the air to more effectively cover and cool the motor body.

[0019] In a preferred embodiment, the connection between the air inlet duct and the air guide duct is provided with a rounded corner structure.

[0020] In this way, the smoothness of the cooling airflow can be further improved to reduce wind resistance, thereby improving the cooling performance of the motor body.

[0021] In a preferred embodiment, the fan shroud for the motor further includes a filter screen connected to the shroud body, the filter screen being located at the end of the air inlet duct away from the air guide duct.

[0022] By installing a filter in this way, dust and impurities can be prevented from entering the motor, thus protecting the motor from external contamination and extending its service life.

[0023] According to another aspect of the present invention, an electric motor is provided, comprising: a motor housing; a motor body located inside the motor housing; the aforementioned motor fan cover; a fan blade assembly located inside the motor fan cover, wherein the output shaft of the motor body extends into the motor fan cover and is connected to the fan blade assembly.

[0024] As can be seen from the above scheme, the air outlet is installed in the motor housing, allowing the cooling air to directly act on the motor body inside the housing. The larger inner diameter of the air outlet can accommodate more cooling air, increasing the overall cooling air volume. By additionally setting up a guide duct with an inner diameter smaller than that of the air outlet, the guide duct can block the diffused cooling air, thus guiding the cooling air to be delivered more concentratedly to the motor housing, reducing the diffusion of cooling air and improving the cooling effect on the motor. This effectively improves the motor's heat dissipation efficiency, especially under long-term high-load operation, ensuring that the heat inside the motor is dissipated in a timely manner, preventing overheating, and thus improving the motor's stability and service life. Attached Figure Description

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:

[0026] Figure 1 This is a schematic diagram of the structure of a fan cover for an electric motor according to an exemplary embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the motor fan cover from another angle;

[0028] Figure 3 for Figure 2 Front view of the fan cover for the motor;

[0029] Figure 4 for Figure 3 A sectional view of the motor fan cover along line AA;

[0030] Figure 5 for Figure 3 A close-up view of the fan cover for the motor.

[0031] The reference numerals used in the above figures are as follows:

[0032] 11. Air inlet duct;

[0033] 12. Air duct;

[0034] 13. Ventilation duct;

[0035] 14. Connecting cylinder;

[0036] 15. Guide wall;

[0037] 16. Rounded corner structure;

[0038] 20. Filter screen. Detailed Implementation

[0039] To make the objectives, technical solutions and advantages of this utility model clearer, the following embodiments are provided to further illustrate this utility model in detail.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0042] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0043] The inventors are aware that a diffusion phenomenon caused by a motor shroud limits the motor's cooling efficiency to approximately 60%. As a result, some of the motor's heat is not dissipated effectively and in a timely manner, which may lead to overheating during long-term operation, thereby reducing its performance and shortening its lifespan.

[0044] Therefore, as Figures 1 to 5 As shown, an embodiment of this utility model provides a fan cover for an electric motor. The fan cover for an electric motor includes a cover body; along the axis L of the fan cover, the cover body includes an air inlet duct 11, an air guide duct 12, and an air outlet duct 13 connected in sequence. From the air inlet duct 11 to the air guide duct 12, the inner diameter of the air inlet duct 11 gradually increases, the inner diameter of the air guide duct 12 is smaller than the inner diameter of the air outlet duct 13, and the air outlet duct 13 is configured to be installed on the motor housing.

[0045] In the above technical solution, the air outlet duct 13 is installed in the motor housing, and the cooling air can directly act on the motor body inside the motor housing. The larger inner diameter of the air outlet duct 13 can accommodate more cooling air, which can increase the overall cooling air volume. By additionally setting the air guide duct 12, and the inner diameter of the air guide duct 12 being smaller than the inner diameter of the air outlet duct 13, the air guide duct 12 can block the diffused cooling air, thereby guiding the cooling air to be delivered to the motor housing more concentratedly, reducing the diffusion of cooling air, and thus improving the cooling effect of the cooling air on the motor. This can effectively improve the heat dissipation efficiency of the motor, especially when the motor is running under high load for a long time, ensuring that the heat inside the motor is dissipated in time, avoiding overheating of the motor, and thus improving the stability and service life of the motor.

[0046] like Figure 4 and Figure 5 As shown, in the embodiment of this utility model, the difference between the inner diameter of the air outlet duct 13 and the inner diameter of the air guide duct 12 is greater than or equal to 3mm and less than or equal to 5mm.

[0047] By setting the aforementioned inner diameter difference, when cooling air enters the air guide duct 12 from the air inlet duct 11, the air velocity will increase and the air pressure will increase accordingly due to the smaller inner diameter of the air guide duct 12. When cooling air enters the air outlet duct 13, the air velocity will decrease due to the larger inner diameter of the air outlet duct 13, but the air pressure will remain relatively high. In this way, the cooling air maintains a straight flow with higher air pressure, so as to blow more directly and concentratedly onto the motor body, thereby reducing the diffusion of cooling air and improving cooling efficiency.

[0048] like Figure 5 As shown in the embodiment of this utility model, the cover also includes a connecting cylinder 14. One end of the connecting cylinder 14 is connected to the air guide duct 12, and the other end of the connecting cylinder 14 is connected to the air outlet duct 13. Along the axis L of the motor fan cover, from the air guide duct 12 to the air outlet duct 13, the inner diameter of the connecting cylinder 14 gradually increases.

[0049] With the above settings, a stable connection can be achieved between the air guide duct 12 and the air outlet duct 13, and the cooling air can be guided smoothly from the air guide duct 12 to the air outlet duct 13, thereby reducing the resistance of the cooling air from the air guide duct 12 to the air outlet duct 13, and thus improving the cooling efficiency of the motor.

[0050] like Figure 1 As shown in the embodiment of this utility model, a guide wall 15 is provided on the periphery of the cover, and the guide wall 15 is arranged parallel to the axis L of the motor fan cover.

[0051] In the above technical solution, when the fan cover is installed on the motor housing, the guide wall 15 is positioned at the bottom. In this way, the cooling air from the upper part and the left and right sides of the fan cover changes direction through the smaller diameter air guide duct 12, making the airflow direction slightly downward (compared to the downward direction of the cooling air after the fan cover is shaped in the prior art). The cooling air is also held in place by the guide wall 15 at the bottom of the fan cover, which makes it difficult for the cooling air to diffuse and concentrates the air pressure, thereby improving the cooling effect of the cooling air on the motor body. Then the cooling air enters the larger diameter air outlet duct 13 for integration. In this way, the cooling air will be in a straight line to cool the motor body, thereby improving the utilization efficiency of the cooling air and increasing the cooling efficiency of the motor from about 60% to about 80%.

[0052] Furthermore, the guide wall 15 is parallel to the axis L of the motor fan cover, which can effectively guide the cooling air to flow along a specific path to reduce the diffusion of the cooling air and thus improve the cooling effect of the cooling air on the motor body.

[0053] Furthermore, after the bottom cooling air changes direction and is guided by the guide wall 15, the air pressure of the cooling air will be significantly enhanced (greater than the air pressure at the cylinder). This will more effectively cool the bottom of the motor body and reduce the possibility of local overheating.

[0054] like Figure 1 As shown, in this embodiment of the invention, the guide wall 15 extends from the inlet of the air guide duct 12 to the outlet of the air outlet duct 13. This allows for more effective guidance of the cooling air along a specific path, reducing air diffusion and thus improving the cooling effect on the motor body.

[0055] like Figure 3 and Figure 4 As shown in the embodiment of this utility model, there is a distance B between the guide wall 15 and the axis L of the motor fan cover, the outer diameter of the air outlet duct 13 is D, B = D / 2 - A, where A is greater than or equal to 4 mm and less than or equal to 5 mm.

[0056] In the above technical solution, by controlling the dimensions precisely, the optimal distance between the guide wall 15 and the axis L of the fan shroud can be ensured, thereby ensuring that the cooling air flows along a specific path while also ensuring the structural strength of the fan shroud.

[0057] It should be noted that in the embodiments of this utility model, distance B refers to the distance between the outer wall surface of the guide wall 15 and the axis L of the motor fan cover.

[0058] like Figure 4 As shown in the embodiment of this utility model, the inner diameter of the air inlet duct 11 is smaller than the inner diameter of the air guide duct 12. In this way, when the cooling air passes through the smaller air inlet duct 11, the wind speed will increase. Subsequently, the wind direction is guided at the air guide duct 12. Due to its larger inner diameter, the speed of the cooling air in the air guide duct 12 will be slowed down, thereby increasing the wind pressure. This allows the air to more effectively cover and cool the motor body.

[0059] Furthermore, since the cooling air is integrated when passing through the air guide duct 12 to maintain high air pressure and directionality, it can prevent the cooling air from spreading rapidly at the air outlet duct 13, so that the cooling air forms a more uniform air field around the motor body, thereby improving the cooling efficiency.

[0060] like Figure 2 As shown in the embodiment of this utility model, the connection position between the air inlet duct 11 and the air guide duct 12 is provided with a rounded corner structure 16. This can further improve the smoothness of the cooling airflow, reduce wind resistance, and thus improve the cooling performance of the motor body.

[0061] It should be noted that in the embodiments of this utility model, the connection between the air inlet duct 11 and the air guide duct 12 is formed by rounding the corners to form a rounded corner structure 16.

[0062] like Figure 2 As shown in the embodiment of this utility model, the fan cover for the motor also includes a filter screen 20 connected to the cover body, and the filter screen 20 is located at the end of the air inlet duct 11 away from the air guide duct 12.

[0063] In the above technical solution, the filter screen 20 is provided to prevent dust and impurities from entering the motor, thereby protecting the motor from external pollution and extending the service life of the motor.

[0064] An embodiment of this utility model provides an electric motor, including: a motor housing; a motor body located inside the motor housing; the aforementioned motor fan cover; a fan blade assembly located inside the motor fan cover, and the output shaft of the motor body extending into the motor fan cover and connecting to the fan blade assembly.

[0065] The motor described above has all the advantages of the motor fan cover mentioned above, which will not be repeated here.

[0066] As can be seen from the above solution, according to the fan cover for the motor proposed in this utility model, the air outlet is installed in the motor housing, and the cooling air can directly act on the motor body inside the motor housing. The larger inner diameter of the air outlet can accommodate more cooling air, which can increase the overall cooling air volume. By setting an additional air guide, and the inner diameter of the air guide is smaller than the inner diameter of the air outlet, the air guide can block the diffused cooling air, thereby guiding the cooling air to be delivered to the motor housing more concentratedly, reducing the diffusion of cooling air, and thus improving the cooling effect of the cooling air on the motor. This can effectively improve the heat dissipation efficiency of the motor, especially when the motor is running under high load for a long time, ensuring that the heat inside the motor is dissipated in time, avoiding overheating of the motor, and thus improving the stability and service life of the motor.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fan shroud for an electric motor, characterized by, The motor fan cover comprises a cover body; Along the axis (L) of the motor fan cover, the cover body comprises an air inlet cylinder (11), an air guide cylinder (12) and an air outlet cylinder (13) connected in sequence, the inner diameter of the air inlet cylinder (11) gradually increases from the air inlet cylinder (11) to the air guide cylinder (12), the inner diameter of the air guide cylinder (12) is smaller than the inner diameter of the air outlet cylinder (13), and the air outlet cylinder (13) is configured to be mounted on the motor shell.

2. The fan shroud for an electric motor of claim 1, wherein, The difference between the inner diameter of the air outlet cylinder (13) and the inner diameter of the air guide cylinder (12) is greater than or equal to 3mm and less than or equal to 5mm.

3. The fan shroud for an electric motor of claim 2, wherein, The cover body further comprises a connecting cylinder (14), one end of the connecting cylinder (14) is connected with the air guide cylinder (12), the other end of the connecting cylinder (14) is connected with the air outlet cylinder (13), and the inner diameter of the connecting cylinder (14) gradually increases from the air guide cylinder (12) to the air outlet cylinder (13) along the axis (L) of the motor fan cover.

4. The fan shroud for an electric motor according to any one of claims 1 to 3, characterized in that, The circumferential side of the cover body is provided with a guide wall (15) which is arranged in parallel with the axis (L) of the motor fan cover.

5. The fan shroud for an electric motor of claim 4, wherein, The guide wall (15) extends from the inlet of the air guide cylinder (12) to the outlet of the air outlet cylinder (13).

6. The fan shroud for an electric motor of claim 4, wherein, The guide wall (15) has a distance B from the axis (L) of the motor fan cover, the outer diameter of the air outlet cylinder (13) is D, and B=D / 2-A, wherein A is greater than or equal to 4mm and less than or equal to 5mm.

7. The fan shroud for an electric motor of any one of claims 1 to 3, wherein The inner diameter of the air inlet cylinder (11) is smaller than the inner diameter of the air guide cylinder (12).

8. The fan shroud for an electric motor of claim 7, wherein, The connecting position of the air inlet cylinder (11) and the air guide cylinder (12) is provided with a round corner structure (16).

9. The fan shroud for an electric machine of claim 8, wherein, The motor fan cover further comprises a filter screen (20) connected with the cover body, and the filter screen (20) is located at one end of the air inlet cylinder (11) away from the air guide cylinder (12).

10. An electric machine characterized by Comprise: A motor shell; A motor body located in the motor shell; The motor fan cover according to any one of claims 1 to 9; A fan blade assembly located in the motor fan cover, and an output shaft of the motor body extends into the motor fan cover and is connected with the fan blade assembly.

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