Aluminum shell corrugated heat dissipation rib structure of explosion-proof motor
By designing a sinusoidal undulating corrugated heat dissipation fin group and nested structure on the aluminum shell of the explosion-proof motor, combined with annular air guide grooves and turbulence protrusions, the problem of insufficient heat dissipation in existing explosion-proof motors is solved, achieving efficient heat dissipation and improved mechanical strength, thereby improving the motor's operational stability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GLONG ELECTRIC (NINGDE) CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-31
AI Technical Summary
Existing explosion-proof motors have limited heat dissipation area due to their aluminum casing heat dissipation fin structure, high airflow resistance, and low heat exchange efficiency. Furthermore, they are prone to localized overheating during long-term high-load operation, which affects the explosion-proof performance and service life of the motor.
The aluminum shell body is equipped with corrugated heat dissipation fins distributed at intervals along the axis. The main corrugated fins are sinusoidal undulations, and the inner side is equipped with secondary corrugated fins, forming a nested double-layer structure. Combined with annular air guide grooves and turbulence protrusions, the airflow channel and heat conduction path are optimized.
It significantly increases the heat dissipation area, improves heat exchange efficiency, enhances natural convection heat dissipation capacity, improves the mechanical strength and operational stability of the motor, reduces the housing temperature during long-term high-load operation, and improves explosion-proof performance.
Smart Images
Figure CN224582991U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor manufacturing technology, specifically to a corrugated heat dissipation fin structure for an explosion-proof motor aluminum shell. Background Technology
[0002] With the increasing demands for industrial automation and safe production, explosion-proof motors are widely used in industries such as chemical, petroleum, natural gas, and mining due to their excellent safety performance. The motor housing, as a crucial component supporting and protecting the internal structure while also serving a heat dissipation function, directly impacts the motor's operating efficiency and safety. In recent years, with the growing demand for lightweight and efficient heat dissipation, aluminum alloy materials have increasingly been applied to motor housing manufacturing.
[0003] In the prior art, the aluminum shell of explosion-proof motors usually has longitudinal or transverse heat dissipation fins on the outer surface to improve the overall heat dissipation performance. However, these heat dissipation fins mostly adopt a straight or rectangular cross-section structure, which leads to problems such as limited heat dissipation area, large air flow resistance, and low heat exchange efficiency. At the same time, under the condition of long-term high-load operation of the motor, such conventional heat dissipation fin structure is prone to causing local overheating, which in turn affects the overall explosion-proof performance and service life of the motor. Utility Model Content
[0004] The purpose of this utility model is to provide a corrugated heat dissipation fin structure for an explosion-proof motor aluminum shell, in order to solve the problems mentioned in the background art, such as limited heat dissipation area, high air flow resistance, low heat exchange efficiency, and easy occurrence of local overheating during long-term high-load operation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a corrugated heat dissipation rib structure for an explosion-proof motor aluminum shell, comprising an aluminum shell body, wherein a plurality of corrugated heat dissipation rib groups are provided on the outer peripheral wall of the aluminum shell body at intervals along the axial direction, each corrugated heat dissipation rib group is composed of multiple main corrugated ribs undulating in a sinusoidal curve, the main corrugated ribs forming a first-level airflow channel between adjacent main corrugated ribs, and secondary corrugated ribs are provided on the inner side of the main corrugated ribs, the secondary corrugated ribs being connected to the main corrugated ribs by connecting ribs to form a nested double-layer corrugated structure, and an annular air guide groove is also provided on the outer wall of the aluminum shell body, the annular air guide groove being located between two adjacent corrugated heat dissipation rib groups and communicating with the first-level airflow channel, and multiple conical turbulence protrusions are provided at the bottom of the annular air guide groove.
[0006] Preferably, the cross-section of the main corrugated rib is a continuously undulating quasi-sine curve with a peak height of 6-10 mm, a trough depth of 3-5 mm, and a wavelength of 20-30 mm. The height of the secondary corrugated rib is half that of the main corrugated rib, and the two are arranged in a staggered manner.
[0007] Preferably, the connecting rib is an inclined structure, with one end connected to the middle of the main corrugated rib and the other end connected to the top of the secondary corrugated rib, with an inclination angle of 30°-45°.
[0008] Preferably, the annular air guide trough has a trapezoidal cross-section structure with a trough depth of 5-8mm, a trough width of 10-15mm, a trough bottom width smaller than the trough opening width, and each turbulence protrusion has a height of 2-4mm and a bottom diameter of 5-8mm.
[0009] Preferably, the top of the main corrugated rib is provided with a serrated edge, which is continuously provided along the length direction of the main corrugated rib, with a tooth height of 1-2mm and a tooth pitch of 3-5mm.
[0010] Preferably, the secondary corrugated rib has a cavity inside, the cavity extends through the entire length of the secondary corrugated rib, and is connected to the external environment through multiple micropores.
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: the corrugated heat dissipation fin structure of the explosion-proof motor aluminum shell significantly increases the heat dissipation area, improves heat exchange efficiency, and enhances natural convection heat dissipation capacity. At the same time, the structure is simple, high-strength, and suitable for the application needs of various specifications of explosion-proof motors. This structure uses main corrugated fins arranged in a sinusoidal curve, with secondary corrugated fins set on their inner side, combined with connecting fins to form a nested double-layer corrugated structure, significantly increasing the heat dissipation area and optimizing the heat conduction path. Simultaneously, the design of the annular air guide groove and turbulence protrusions effectively guides airflow and enhances air turbulence, improving natural convection efficiency. The overall structure not only improves heat dissipation performance and mechanical strength but also has good adaptability. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the corrugated heat dissipation fin structure of an explosion-proof motor aluminum shell according to the present invention; Figure 2 This is a side view of the aluminum shell body of the explosion-proof motor aluminum shell with corrugated heat dissipation fins according to the present invention. Figure 3 This is a schematic diagram of the connection structure between the secondary corrugated ribs and the main corrugated ribs of the corrugated heat dissipation rib structure of the aluminum shell of an explosion-proof motor according to this utility model.
[0013] In the diagram: 1. Aluminum shell body; 2. Corrugated heat dissipation fin assembly; 201. Main corrugated fin; 202. Secondary corrugated fin; 203. Connecting fin; 204. Serrated edge; 205. Cavity; 206. Micropore; 3. First-stage airflow channel; 4. Annular air guide groove; 5. Turbulence protrusion. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1-3This utility model provides a technical solution: a corrugated heat dissipation rib structure for an explosion-proof motor aluminum shell, including an aluminum shell body 1. Several corrugated heat dissipation rib groups 2 are provided on the outer peripheral wall of the aluminum shell body 1, spaced apart along the axial direction. Each corrugated heat dissipation rib group 2 consists of multiple main corrugated ribs 201 undulating with a sinusoidal curve. Adjacent main corrugated ribs 201 form a first-level airflow channel 3, and secondary corrugated ribs 202 are provided inside the main corrugated ribs 201. The secondary corrugated ribs 202 are connected to the main corrugated ribs 201 by connecting ribs 203, forming a nested double-layer corrugated structure. The outer wall of the aluminum shell body 1 also has an annular air guide groove 4, located between two adjacent corrugated heat dissipation rib groups 2 and connected to the first-level airflow channel 3. The bottom of the annular air guide groove 4 has multiple conical... The structure features turbulence protrusions 5. The corrugated heat dissipation ribs 2 on the aluminum shell body 1 are arranged in a sinusoidal undulating pattern via multiple main corrugated ribs 201, forming axially distributed heat dissipation units. The first-stage airflow channel 3 provides a smooth path for external airflow, effectively increasing the heat dissipation contact area and heat exchange efficiency. The secondary corrugated ribs 202 are connected to the main corrugated ribs 201 via connecting ribs 203, enhancing the overall structural strength and further refining the spatial layout of the heat dissipation surface, allowing heat to diffuse outwards more evenly. The annular air guide trough 4 effectively guides external airflow into the heat dissipation area. The turbulence protrusions 5 disrupt the airflow boundary layer, enhancing air turbulence and improving convective heat transfer efficiency. Overall, this structure increases the heat dissipation area while optimizing the airflow path, significantly improving heat dissipation efficiency. This design significantly improves natural convection heat dissipation, solving problems such as small heat dissipation area, high airflow resistance, low heat exchange efficiency, and excessively high local temperatures under high loads caused by the simple structure of existing linear heat dissipation fins. This enhances the operational stability and safety of explosion-proof motors under complex operating conditions. The main corrugated fin 201 has a continuously undulating, sinusoidal cross-section with a peak height of 6-10mm, a trough depth of 3-5mm, and a wavelength of 20-30mm. The secondary corrugated fin 202 has a height half that of the main corrugated fin 201, and the two are staggered. This structure effectively increases the contact area between the main corrugated fin 201 and the air. Simultaneously, the optimized parameter combination of the main corrugated fin height and spacing ensures smooth airflow through the first-stage airflow channel 3 and the formation of a stable flow. Convection occurs as the corrugated structures of the secondary corrugated rib 202 and the primary corrugated rib 201 complement each other spatially, further refining the heat dissipation area and improving heat exchange efficiency while preventing heat accumulation. Therefore, this staggered nested structure not only enhances the overall mechanical strength of the aluminum shell but also improves the uneven heat dissipation problem caused by the simple structure of traditional straight heat dissipation ribs. The connecting rib 203 is an inclined structure, with one end connected to the middle of the primary corrugated rib 201 and the other end connected to the top of the secondary corrugated rib 202, with an inclination angle of 30°-45°. This connecting rib 203 forms a stable oblique support system, enhancing the structural connection strength between the primary corrugated rib 201 and the secondary corrugated rib 202 while effectively transferring and dispersing the thermal stress and mechanical load from the primary corrugated rib 201.The annular air guide trough 4 has a trapezoidal cross-section structure with a trough depth of 5-8mm and a trough width of 10-15mm. The bottom width of the trough is smaller than the opening width. Each of the turbulence protrusions 5 has a height of 2-4mm and a bottom diameter of 5-8mm. This annular air guide trough 4 creates a gradually expanding airflow space between adjacent sets of corrugated heat dissipation fins 2, effectively guiding external cold air into the first-stage airflow channel 3 and accelerating airflow. The turbulence protrusions 5, through their three-dimensional protrusion shape, turbulent the flowing air, breaking the boundary layer heat retention phenomenon and enhancing local heat exchange efficiency. The synergistic cooperation between the annular air guide trough 4 and the turbulence protrusions 5 not only optimizes the airflow organization of the overall heat dissipation system but also improves the heat dissipation capacity under natural convection conditions, thereby effectively reducing the casing temperature of the motor during long-term high-load operation, improving explosion-proof performance and operational stability. The top of the main corrugated fin 201 is provided with a serrated edge 204, which is continuously arranged along the length of the main corrugated fin 201, with a tooth height of 1-2mm. With a tooth pitch of 3-5mm, the serrated edge 204 structure disrupts the boundary layer of airflow on the surface of the main corrugated rib 201, enhancing local airflow disturbance and allowing heat to be transferred more quickly from the surface of the main corrugated rib 201 to the surrounding environment. The secondary corrugated rib 202 has a cavity 205 that extends along its entire length and is connected to the external environment through multiple micropores 206. When the motor generates heat, the cavity 205 inside the secondary corrugated rib 202 acts as a channel for hot airflow. Heated air expands within the cavity 205 and exchanges with external air through the micropores 206, forming a continuous internal and external airflow circulation. This combination of the cavity 205 and the micropores 206 not only improves the heat conduction efficiency of the secondary corrugated rib 202 itself but also effectively accelerates the diffusion of heat from its interior to the external environment, preventing heat accumulation in localized areas of the secondary corrugated rib 202 and thus enhancing the thermal balance and stability of the overall heat dissipation structure.
[0016] Working principle: When using the corrugated heat dissipation fin structure of the aluminum shell of this explosion-proof motor, when the motor starts running and generates heat, the heat is first conducted from the inside of the aluminum shell body 1 to the outside, passing through the main corrugated fin 201 and the secondary corrugated fin 202 in sequence. The sinusoidal undulating structure of the main corrugated fin 201 and the secondary corrugated fin 202 are stably connected by the connecting fin 203, so that the heat is distributed and diffused along these structures. At the same time, the external air flows along the first-stage airflow channel 3 under the action of the ambient temperature difference, and enters the area between adjacent corrugated heat dissipation fin groups 2 through the annular air guide groove 4. The turbulence protrusion 5 disturbs the air entering the annular air guide groove 4. During the flow, the air is further affected by the sawtooth edge 204 at the top of the main corrugated fin 201, the boundary layer is destroyed, and the airflow is continuously renewed. Meanwhile, the cavity 205 inside the secondary corrugated fin 202 serves as a hot air flow path. The heated and expanded air inside exchanges with the outside through the micropores 206 to form an internal circulating airflow, thereby completing a series of tasks.
[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A kind of anti-explosion motor aluminum shell corrugated heat sink structure, including aluminum shell body (1), it is characterized by: The outer peripheral wall of the aluminum shell body (1) is provided with a number of corrugated heat dissipation rib groups (2) distributed axially. Each corrugated heat dissipation rib group (2) is composed of multiple main corrugated ribs (201) undulating with a sinusoidal curve. The main corrugated ribs (201) form a first-level airflow channel (3) between each other. The inner side of the main corrugated ribs (201) is provided with secondary corrugated ribs (202). The secondary corrugated ribs (202) are connected to the main corrugated ribs (201) by connecting ribs (203) to form a nested double-layer corrugated structure. The outer wall of the aluminum shell body (1) is also provided with an annular air guide groove (4). The annular air guide groove (4) is located between two adjacent corrugated heat dissipation rib groups (2) and is connected to the first-level airflow channel (3). The bottom of the annular air guide groove (4) is provided with multiple conical turbulence protrusions (5).
2. The structure of the corrugated cooling ribs of the aluminum shell of the explosion-proof motor according to claim 1, characterized in that: The cross-section of the main corrugated rib (201) is a continuous undulating sinusoidal curve with a peak height of 6-10 mm, a trough depth of 3-5 mm, and a wavelength of 20-30 mm. The secondary corrugated rib (202) has a height of half that of the main corrugated rib (201), and the two are arranged in a staggered manner.
3. The corrugated heat dissipation fin structure for an explosion-proof motor aluminum shell according to claim 1, characterized in that: The connecting rib (203) is an inclined structure, with one end connected to the middle of the main corrugated rib (201) and the other end connected to the top of the secondary corrugated rib (202), with an inclination angle of 30°-45°.
4. The structure of the corrugated cooling ribs of the aluminum shell of the explosion-proof motor according to claim 1, characterized in that: The annular air guide trough (4) has a trapezoidal cross-section structure with a trough depth of 5-8mm, a trough width of 10-15mm, a trough bottom width that is smaller than the trough opening width, and each of the turbulence protrusions (5) has a height of 2-4mm and a bottom diameter of 5-8mm.
5. The structure of the corrugated cooling fin of the aluminum shell of the explosion-proof motor according to claim 1, characterized in that: The top of the main corrugated rib (201) is provided with a serrated edge (204), which is continuously arranged along the length direction of the main corrugated rib (201), with a tooth height of 1-2mm and a tooth pitch of 3-5mm.
6. The structure of the corrugated cooling fin of the aluminum shell of the explosion-proof motor according to claim 1, characterized in that: The secondary corrugated rib (202) has a cavity (205) inside, which runs through the entire length of the secondary corrugated rib (202) and is connected to the external environment through multiple micropores (206).