Motor heat dissipation device

Abstract

The utility model provides a motor heat dissipation device, which comprises a fan cover coaxially and fixedly arranged on the outer side of a motor shell and a fan fixed at one end of the fan cover, a plurality of protruding parts protruding inwards are distributed on the inner wall of the fan cover, the protruding parts are supported between the inner wall of the fan cover and the outer wall of the motor shell, and the fan cover is fixed on the fan cover. An annular air channel is formed between the inner wall of the fan cover and the outer wall of the motor shell, a baffle is fixed to one end of the fan cover, a mounting hole is formed in the baffle, and the fan is mounted in the mounting hole and located at one end of the annular air channel. The motor heat dissipation device is high in heat dissipation efficiency, uniform in airflow distribution and suitable for being used under a high-temperature closed working condition.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, and more specifically, to a motor heat dissipation device. Background Technology

[0002] In recent years, motor manufacturing technology has been continuously developing towards miniaturization and high power density. To improve performance, high electromagnetic load and high thermal load materials are commonly used inside motors, leading to a significant increase in losses during operation. This makes the overall temperature rise and local overheating problems of motors increasingly prominent, which not only accelerates the aging of insulation materials and shortens their service life, but may also cause deformation or even burnout of components inside the junction box, seriously affecting the safety and reliability of the motor.

[0003] Currently, conventional heat dissipation solutions mainly rely on the heat dissipation fins on the surface of the motor housing, supplemented by external fans for forced cooling. However, the heat dissipation efficiency of the fins is limited by ambient temperature and airflow, while fans often suffer from uneven airflow distribution and difficulty in accurately covering high-heat areas, resulting in limited overall heat dissipation. Especially in high-temperature or enclosed operating conditions, existing heat dissipation methods are insufficient to meet the heat dissipation requirements of high-power-density motors. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a motor cooling device with high heat dissipation efficiency, uniform airflow distribution and adaptability to high temperature and closed working conditions. By optimizing the air duct structure and heat dissipation component layout, the cooling airflow is precisely guided to cover the high-heat area, while taking into account the compact design, so as to solve the problem of temperature rise control of high power density motors.

[0005] To solve the above problems, this utility model provides a motor heat dissipation device, including a fan shroud coaxially fixed on the outside of the motor housing and a fan fixed to one end of the fan shroud. The inner wall of the fan shroud is provided with a plurality of inwardly protruding parts, which are supported between the inner wall of the fan shroud and the outer wall of the motor housing. An annular air duct is formed between the inner wall of the fan shroud and the outer wall of the motor housing. A baffle is fixed to one end of the fan shroud, and a mounting hole is opened on the baffle. The fan is installed in the mounting hole and located at one end of the annular air duct.

[0006] Compared with the prior art, the advantages of this utility model are as follows: the protrusion and the annular air duct design forcefully guide the airflow of the fan to flow along the axial direction of the motor housing, which significantly improves the contact area between the airflow and the heat dissipation fins and the heat exchange efficiency. The baffle integrates the fan installation structure, realizing the seamless connection between the air duct inlet and the fan, reducing airflow turbulence loss, and maintaining stable heat dissipation performance in high temperature and sealed environment. At the same time, the overall structure is compact and reduces space occupation.

[0007] As an improvement, the outer wall of the fan shroud has screw holes that correspond one-to-one with the protrusions. The screw holes penetrate the protrusions and are threaded with fastening wires, the ends of which are fixed to the outer wall of the motor housing. With this structure, the rigid connection between the screws penetrating the protrusions and the motor housing forms a multi-point distributed mechanical locking structure, effectively suppressing the relative displacement between the fan shroud and the housing caused by vibration. The protrusions also serve as a support frame for the air duct and a stress-dispersing carrier, preventing deformation of sheet metal parts caused by localized stress concentration and improving the structural stability of the device under long-term vibration conditions.

[0008] As an improvement, the protrusions are formed by the inward bulge of the outer wall of the shroud. Corresponding insertion holes are formed on the outer wall of the shroud, with the screw holes coaxially located inside these holes. The head of the fastening screw is concealed within the insertion holes. This structure, with its insertion holes and concealed fastening screw head design, protects the screw head from corrosive media penetration into the threaded connection by encasing it in the hole walls. This significantly improves the weather resistance and service life of the fastening structure, and also makes the overall structure more aesthetically pleasing.

[0009] As an improvement, the fan cover includes two semi-circular first and second sheet metal parts. The two sheet metal parts are joined and fixed at both ends into a cylindrical shape and both are fixedly connected to a baffle. The first sheet metal part has a mounting groove for installing a junction box, which connects to an annular air duct. With this structure, the split sheet metal parts allow for easier assembly while avoiding obstructions to external components such as the motor junction box, reducing installation complexity. The through-flow design of the mounting groove and annular air duct allows some cooling airflow to pass through the junction box, specifically reducing the temperature rise of the terminals and avoiding the need for an additional junction box heat dissipation device in traditional solutions, thus achieving modular and efficient heat dissipation. Attached Figure Description

[0010] Figure 1 This is the first perspective view of the present invention;

[0011] Figure 2 This is the second perspective view of the present invention;

[0012] Figure 3 This is the first usage state diagram of this utility model;

[0013] Figure 4 This is the second usage diagram of this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Fan cover; 11. First sheet metal part; 110. Mounting groove; 12. Second sheet metal part; 2. Fan; 3. Protrusion; 31. Screw hole; 32. Fastening screw; 33. Embedding hole; 4. Annular air duct; 5. Baffle; 50. Mounting hole. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 4 As shown, a motor cooling device includes a fan shroud 1 coaxially fixed to the outside of the motor housing and a fan 2 fixed to one end of the fan shroud 1. The inner wall of the fan shroud 1 is provided with a plurality of inwardly protruding protrusions 3, which are supported between the inner wall of the fan shroud 1 and the outer wall of the motor housing. An annular air duct 4 is formed between the inner wall of the fan shroud 1 and the outer wall of the motor housing. A baffle 5 is fixed to one end of the fan shroud 1, and a mounting hole 50 is provided on the baffle 5. The fan 2 is installed in the mounting hole 50 and located at one end of the annular air duct 4.

[0018] In this embodiment, the protrusion 3 and the annular air duct 4 are designed to force the airflow of the fan 2 to flow along the axial direction of the motor housing, which significantly improves the contact area between the airflow and the heat dissipation fins and the heat exchange efficiency. The baffle 5 integrates the fan 2 mounting structure to achieve seamless connection between the air duct inlet and the fan 2, reducing airflow turbulence loss. It can still maintain stable heat dissipation performance in a high-temperature and sealed environment. At the same time, the overall structure is compact and reduces space occupation.

[0019] like Figure 1 As shown, the outer wall of the fan cover 1 has screw holes 31 corresponding to the protrusions 3 one-to-one. The screw holes 31 penetrate the protrusions 3 and are threaded with fastening wires 32. The ends of the fastening wires 32 are fixed to the outer wall of the motor housing. The fastening wires 32, through their threaded connection to the outer wall of the motor housing, can fix the fan cover 1 to the motor housing. Similarly, the fastening wires 32, pressed tightly against the outer wall of the motor housing, can also fix the fan cover 1 to the motor housing. When the outer wall of the motor housing is covered with fastening wires 32, the fastening wires 32 on both sides of the motor housing can clamp and fix the motor housing from both sides. With this structure, the rigid connection between the screws penetrating the protrusions 3 and the motor housing forms a multi-point distributed mechanical locking structure, effectively suppressing the relative displacement between the fan cover 1 and the housing caused by vibration. The protrusions 3 also serve as a support frame for the air duct and a stress dispersion carrier, avoiding deformation of sheet metal parts caused by local stress concentration and improving the structural stability of the device under long-term vibration conditions.

[0020] like Figure 1As shown, the protrusion 3 is formed by the inward bulge of the outer wall of the shroud 1. The outer wall of the shroud 1 has corresponding mounting holes 33. The screw hole 31 is coaxially located inside the mounting hole 33, and the head of the fastening screw 32 is hidden within the mounting hole 33. With this structure, the mounting hole 33 and the hidden head of the fastening screw 32, through the protection of the screw head by the hole wall, prevent corrosive media from entering the threaded connection, significantly improving the weather resistance and service life of the fastening structure, and making the overall structure more aesthetically pleasing.

[0021] like Figure 2 and Figure 4 As shown, the fan cover 1 includes two semi-circular first sheet metal parts 11 and second sheet metal parts 12. The two ends of the first sheet metal parts 11 and 12 are spliced ​​and fixed into a cylindrical shape and are both fixedly connected to the baffle 5. The first sheet metal part 11 has a mounting groove 110 for installing the junction box, and the mounting groove 110 is connected to the annular air duct 4. The first sheet metal parts 11 and 12 are usually fixed by riveting, which can obtain better structural strength. After applying this structure, the split sheet metal splicing structure makes it easier to avoid external components such as motor junction boxes during assembly, reducing installation complexity. The design of the mounting groove 110 and the annular air duct 4 allows some cooling airflow to flow through the junction box, which specifically reduces the temperature rise of the wiring terminals and avoids the problem of needing to add a junction box heat dissipation device in the traditional solution, realizing modular and efficient heat dissipation.

[0022] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A motor cooling device, characterized in that, include: A fan shroud (1) is coaxially fixed on the outside of the motor housing and a fan (2) is fixed at one end of the fan shroud (1). The inner wall of the fan shroud (1) is provided with a plurality of inwardly protruding protrusions (3). The protrusions (3) are supported between the inner wall of the fan shroud (1) and the outer wall of the motor housing. An annular air duct (4) is formed between the inner wall of the fan shroud (1) and the outer wall of the motor housing. A baffle (5) is fixed at one end of the fan shroud (1). An installation hole (50) is opened on the baffle (5). The fan (2) is installed in the installation hole (50) and located at one end of the annular air duct (4).

2. The motor cooling device according to claim 1, characterized in that: The outer wall of the fan cover (1) is provided with screw holes (31) that correspond one-to-one with the protrusion (3). The screw holes (31) penetrate the protrusion (3) and are threaded with fastening wires (32). The end of the fastening wires (32) is fixed to the outer wall of the motor housing.

3. The motor cooling device according to claim 2, characterized in that: The protrusion (3) is formed by the inward bulging of the outer wall of the wind cover (1). The outer wall of the wind cover (1) has an inlay hole (33) that corresponds to the protrusion (3). The screw hole (31) is coaxially located inside the inlay hole (33). The head of the fastening wire (32) is hidden inside the inlay hole (33).

4. The motor cooling device according to claim 1, characterized in that: The hood (1) includes two semi-circular first sheet metal parts (11) and second sheet metal parts (12). The first sheet metal parts (11) and the second sheet metal parts (12) are spliced ​​and fixed at both ends into a cylindrical shape and are fixedly connected to the baffle (5). The first sheet metal parts (11) are provided with a mounting groove (110) for installing a junction box. The mounting groove (110) is connected to the annular air duct (4).

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