Self-cooling flying wing type radiator for transformer
By using a wing-shaped heat sink assembly and air guide shroud made entirely of aluminum alloy, the problems of heavy transformer heat sinks and poor heat dissipation are solved, achieving efficient and lightweight heat dissipation and adapting to different space requirements.
Patent Information
- Application Number
- CN202520220533.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing transformer radiators are heavy, have poor heat dissipation, and have a fixed height, making them unsuitable for different space requirements and resulting in insufficient utilization of natural airflow.
The wing-shaped heat sink assembly, made entirely of aluminum alloy, increases the heat dissipation area and promotes forced convection by adjusting the distribution direction, shape, and density of the heat sink assembly, combined with the air guide shroud design, thus adapting to different height requirements.
It improves heat dissipation efficiency, reduces weight, enhances natural convection heat dissipation, adapts to different space requirements, and ensures the efficient operation of the radiator.
Smart Images
Figure CN223797234U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat dissipation technology, specifically to a self-cooling wing-type heat sink for transformers. Background Technology
[0002] In recent years, with the growth in electricity demand, the load on the power grid has become increasingly heavy, and transformers have been operating at full or overload for extended periods. Therefore, rapid and effective heat dissipation is crucial for improving the overload capacity of transformers, responding to emergencies, and ensuring safe operation.
[0003] A transformer radiator is a heat exchange device that reduces the temperature of the cooling oil in a distribution transformer or power supply transformer by transferring heat from the transformer oil to the surrounding air.
[0004] There are currently various types of transformer radiators on the market, which typically consist of an inlet manifold, an outlet manifold, and a radiator core. During operation, transformer oil flows into the radiator core through the inlet manifold, and the core has at least one oil flow channel to deliver the oil to the outlet manifold.
[0005] However, existing transformer radiators mostly use iron fins, and their cores are also made of iron. Under the same heat exchange conditions, this structure is not only heavy, but also, for a specific transformer, the core height is usually fixed, which limits the adjustability of the overall radiator height to adapt to different spaces. Furthermore, the current arrangement and structure of the fins are relatively simple, resulting in less than ideal heat dissipation effect and efficiency. Moreover, although natural wind around the radiator can carry away some heat, current technology rarely addresses how to collect and utilize this natural wind to improve heat dissipation efficiency. Utility Model Content
[0006] In view of the above-mentioned technical problems in the prior art, the purpose of this utility model is to provide a self-cooling wing-type radiator for transformers that can adapt to heat dissipation cores of different heights and has good heat dissipation effect.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A self-cooling wing-type radiator for transformers includes a heat dissipation core, an oil inlet structure, and an oil outlet structure; the oil inlet structure and the oil outlet structure are symmetrically arranged on the oil inlet side and the oil outlet side of the heat dissipation core.
[0009] The heat dissipation core includes a mechanical structural frame and M groups of heat dissipation fins arranged laterally within the mechanical structural frame; each heat dissipation fin group includes N winged flat tubes arranged longitudinally, where M and N are natural numbers greater than 1; the winged flat tube includes a flat base tube and wing formed integrally by cutting on the flat base tube.
[0010] Each heat sink assembly has its oil inlet and outlet sides connected to the oil inlet and outlet structures respectively via longitudinally arranged tube bundle end plates; the tube bundle end plates have channels corresponding to the oil passages of the wing-shaped flat tubes; the two ends of the tube bundle end plates are integrated with the mechanical structural frame.
[0011] The oil inlet or outlet structure includes multiple oil collection chambers corresponding one-to-one with the end plate of the tube bundle on the side and a main pipe.
[0012] One side of the oil collecting chamber is attached and connected to the corresponding tube bundle end plate, and the main tube is located on the other side of the oil collecting chamber; both sides of the oil collecting chamber are provided with corresponding oil passage holes to realize the oil passage connection between the oil inlet structure, the heat dissipation core and the oil outlet structure.
[0013] As a preferred technical solution, the main pipe is completely cut off from the oil collecting chamber on the same side.
[0014] As a preferred technical solution, a manifold is provided between the main pipe and each oil collecting chamber; one end of the manifold is connected to the main pipe, and the other end is connected to the oil collecting chamber.
[0015] As a preferred technical solution, all flying wing flat tubes are arranged in any one of the following configurations: orthogonal arrangement, oblique arrangement, angled sequential arrangement, angled reverse arrangement, human-shaped sequential arrangement, or human-shaped reverse arrangement.
[0016] As a preferred technical solution, the flying wing on the flying wing flat tube can be any one of the following: straight, curved, or corrugated.
[0017] As a preferred technical solution, the corrugation type includes a flat wave, a sine wave, a trapezoidal tooth wave, and a triangular tooth wave.
[0018] As a preferred technical solution, the fin angle between the wing and the flat base tube on each of the flying wing flat tubes is 30~60°; and / or, the wing on the flying wing flat tube can be perpendicular or inclined to the length direction of the plane of the flat base tube on which it is located.
[0019] As a preferred technical solution, the distribution spacing of the wings on each of the wing flat tubes on the base tube can be consistent or inconsistent; and the distribution spacing is maintained at 1~20mm.
[0020] As a preferred technical solution, it also includes an air guide shroud; the air guide shroud is a cylindrical structure with openings at the top and bottom, and the heat dissipation core is centrally located inside the air guide shroud.
[0021] As a preferred technical solution, the mechanical structure frame is integral, that is, the heat dissipation core includes two frame plates, front and rear, which are connected as a whole by upper and lower tube bundle end plates; the heat dissipation core is integrally embedded in the mechanical structure frame.
[0022] This utility model has the following advantages compared with the prior art:
[0023] 1. This utility model improves the heat dissipation core by replacing the steel heat dissipation plate with an all-aluminum winged flat tube, which greatly increases the outer surface area of the heater, allowing more air to be heated and rise, thus enhancing the natural convection and heat dissipation effect.
[0024] 2. By adjusting the distribution direction of the heat sink assembly, the distribution direction of the winged flat tubes, as well as the shape, distribution density, and fin angle between the wing and the flat base tube, a better heat dissipation effect can be achieved.
[0025] 3. Depending on the height of the heat dissipation core, a manifold may be installed or removed between the main pipe and the oil collection chamber to accommodate heat dissipation cores of different heights and meet the heat dissipation requirements of different scenarios.
[0026] 4. By setting up an air guide shroud, the rising hot airflow around the heat sink assembly and at the bottom of the radiator can be effectively concentrated and guided. This concentration promotes the formation of forced convection, which not only significantly improves the convective heat transfer coefficient but also quickly removes heat from the radiator surface, ensuring the efficient operation of the entire radiator. Attached Figure Description
[0027] Figure 1 This is a front view of the self-cooling wing-type radiator for transformers containing a manifold according to this utility model.
[0028] Figure 2 This is a three-dimensional structural schematic diagram of the self-cooling wing-type radiator for transformers in this utility model;
[0029] Figure 3 This is a three-dimensional structural diagram of a single heat sink assembly in this utility model;
[0030] Figure 4 This is a three-dimensional structural diagram of the self-cooling wing-type radiator for transformers that eliminates the manifold in this utility model.
[0031] Figure 5 This is a schematic diagram of the parallel orthogonal arrangement of the flying wing flat tubes in this utility model;
[0032] Figure 6 This is a schematic diagram of the parallel and oblique arrangement of the flying wing flat tubes in this utility model;
[0033] Figure 7 This is a schematic diagram of the flying wing flat tubes arranged in a angular row in this utility model;
[0034] Figure 8 This is a schematic diagram of the reverse-arranged angled flat tubes of the flying wing in this utility model;
[0035] Figure 9This is a schematic diagram of the flying wing flat tubes arranged in a row in this utility model;
[0036] Figure 10 This is a schematic diagram of the reverse-arrangement of the flying wing flat tube in this utility model;
[0037] Figure 11 This is a schematic diagram of a single flying wing flat tube in this utility model;
[0038] Figure 12 for Figure 11 A magnified view of a portion of the image;
[0039] Figure 13 This is a schematic diagram of the oblique fin structure in a single flying wing flat tube;
[0040] Figure 14 A schematic diagram showing an air guide shroud installed on the upper part of the heat sink assembly;
[0041] Figure 15 A schematic diagram showing that air guide shrouds are installed on both the upper and lower parts of the heat sink assembly;
[0042] Figure 16 A schematic diagram showing the heatsink assembly with an air guide shroud installed.
[0043] In the diagram: 1. Heat dissipation core; 11. Mechanical structural frame; 12. Heat dissipation fin assembly; 13. Flying wing flat tube; 13a. Flat base tube; 13b. Flying wing; 14. Tube bundle end plate; 14a. Channel; 2. Oil inlet structure; 21. Oil collection chamber; 22. Main tube; 23. Manifold; 3. Oil outlet structure; 4. Air guide shroud. Detailed Implementation
[0044] The present invention will now be described in further detail with reference to the accompanying drawings.
[0045] Example 1
[0046] See Figures 1-4 This embodiment discloses a self-cooling wing-type radiator for transformers, including a heat dissipation core 1, an oil inlet structure 2, and an oil outlet structure 3. The oil inlet structure 2 and the oil outlet structure 3 are symmetrically arranged on the oil inlet side and oil outlet side of the heat dissipation core 1. The oil inlet structure 2 is connected to the oil outlet of the transformer, and the oil outlet structure 3 is connected to the oil inlet of the transformer. Thus, the high-temperature oil inside the transformer is extracted by the oil pump, cooled by the heat dissipation core 1, and then transported back into the transformer.
[0047] The heat dissipation core 1 includes a mechanical structural frame 11 and M heat dissipation fin groups 12 arranged laterally within the mechanical structural frame; each heat dissipation fin group 12 includes N all-aluminum winged flat tubes 13 arranged longitudinally, and the winged flat tubes 13 are provided with oil passages connecting the oil inlet structure 2 and the oil outlet structure 3; wherein, M and N are both natural numbers greater than 1.
[0048] In the heat dissipation core 1 of this utility model, the oil inlet side and oil outlet side of each heat dissipation fin group 12 are respectively connected to the oil inlet structure 2 and the oil outlet structure 3 through the longitudinally arranged tube bundle end plate 14; the tube bundle end plate 14 has a channel 14a corresponding to the oil passage of the flying wing flat tube 13; the mechanical structure frame 11 is integral, that is, it includes two frame plates at the front and rear and is connected into a whole through the upper and lower tube bundle end plates 14; the heat dissipation core is embedded in the mechanical structure frame as a whole, making assembly simpler.
[0049] Example 2
[0050] like Figure 1 , 2 As shown, the oil inlet structure 2 and oil outlet structure of this utility model include multiple oil collection chambers 21 corresponding one-to-one with the end plate 14 of the tube bundle on the same side, and a main pipe 22; the oil collection chamber 21 is a tube structure with a semi-circular or rectangular cross-section; when the cross-section of the oil collection chamber 21 is semi-circular, its planar side is attached to and connected with the corresponding end plate 14 of the tube bundle, and the main pipe 22 is provided on the arc side of the oil collection chamber 21; both the arc side and the planar side of the oil collection chamber 21 are provided with corresponding oil passage holes to realize the oil passage connection between the oil inlet structure 2, the heat dissipation core 1 and the oil outlet structure 3.
[0051] The actual size of the heat dissipation core 1 is related to its heat dissipation requirements. In practical applications, the distance between the main pipe 22 of the oil inlet structure 2 and the oil outlet structure 3 is fixed. Therefore, a manifold 23 can be set between the main pipe 22 and the oil collection chamber 21 according to the height of the heat dissipation core 1.
[0052] Specifically, such as Figure 1 , 2 As shown, when the height of the heat dissipation core 1 is insufficient to contact the main pipe 22, a manifold 23 is provided between the main pipe 22 and each oil collection chamber 21; one end of the manifold 23 is connected to the main pipe 22, and the other end is connected to the oil collection chamber 21, thereby realizing the connection between the main pipe 22 and the oil collection chamber 21. Figure 4 As shown, when the height of the heat dissipation core 1 meets the installation requirements, that is, the main pipe 22 is completely cut off from the oil collection chamber on the side, and the connection with the internal oil circuit of the heat dissipation core 1 is directly realized.
[0053] Example 3
[0054] like Figures 5-10 As shown, based on embodiments 1 and 2, this embodiment improves the arrangement direction of the heat sink assembly 12 and its internal wing-shaped flat tube 13, including the following technical solutions:
[0055] 1) All flying wing flat tubes 13 are arranged orthogonally or obliquely, such as Figure 5 As shown, in the M heat sink groups 12, all the winged flat tubes 13 are arranged orthogonally to the axis of the main tube 22; or as shown in the figure. Figure 6As shown, with the axis of the main tube 22 as the reference, all the flying wing flat tubes 13 are simultaneously tilted to the left or right in an oblique arrangement.
[0056] 2) such as Figure 7 As shown, all the flying wing flat tubes are arranged in a straight line. Specifically, when N flying wing flat tubes 13 in the same heat sink group 12 are arranged in parallel, the flying wing flat tubes 13 in adjacent groups are tilted in opposite directions, that is, one tilts to the left and the other tilts to the right.
[0057] 3) such as Figure 8 As shown, all the winged flat tubes are arranged in reverse order. Specifically, the winged flat tubes 13 in adjacent heat sink groups 12 are not arranged in parallel, and the N adjacent winged flat tubes 13 in the same heat sink group 12 have opposite tilt directions.
[0058] 4) such as Figure 9 , 10 As shown, all the winged flat tubes are arranged in either a forward or reverse direction. Specifically, the winged flat tubes 13 in all heat sink groups 12 are configured in the same way, but the N adjacent winged flat tubes 13 in the same heat sink group 12 are tilted in opposite directions.
[0059] Experiments show that diagonal and angled arrangement increases the path of the wind and the flow distance compared to orthogonal arrangement. When the air is completely still, the difference is not significant; however, when there is airflow above 0.4 m / s, the diagonal arrangement results in significantly more heat transfer than the parallel orthogonal arrangement. When the wind is unsteady, the heat transfer capacity of the angled arrangement is more significant than that of the diagonal arrangement.
[0060] Both angled and counter-angled layouts increase the proportion of airflow within the heatsink core volume. However, under constraints on a certain dimension or core volume, this leads to a reduction in the number of rows, resulting in a decrease in heat exchange area. Therefore, whether the overall heat exchange capacity increases depends on the airflow conditions. If the heatsink core is installed in an environment with a constant wind speed exceeding 2 m / s, this arrangement saves on material consumption while still meeting heat exchange requirements. However, in terms of wind direction and row spacing, angled counter-angled layouts are more advantageous in high-wind or more compact designs.
[0061] Example 4
[0062] See Figure 11 , 12Based on embodiments 1-3, this embodiment improves upon the wing 13b on the winged flat tube 13. Specifically, the winged flat tube 13 includes a flat base tube 13a and wing 13b integrally formed by shaving off the larger sides of the flat base tube 13a. This significantly increases the surface area of the radiator compared to traditional heat sinks, thereby promoting heat transfer during airflow. The integrated design of the flat base tube and the heat-dissipating wing 13b achieves highly efficient body heat dissipation, almost eliminating the temperature gradient between the base tube and the wing 13b. Therefore, the radiator assembly can effectively heat the air, increase the upward force of the air, and thus accelerate the heat dissipation process.
[0063] Based on an initial temperature difference of 50K, an ambient temperature of 20℃, and without considering altitude, the heat dissipation flux density of conventional heat sinks in existing technologies is generally 2~3 W / m². 2 • K; The heat flux density of the wing-shaped radiator in this invention can reach 6~10 W / m³. 2 ·K.
[0064] In addition, the heat dissipation materials provided by the existing technology are usually steel or iron. The flying wing flat tube 13 of this utility model is made of all aluminum alloy, which not only has a low density and can reduce the overall weight of the radiator, but also can avoid "material accumulation and tool sticking" caused by the material being too soft and "flying wing cracking" caused by the material being too hard during the scraping process. It also has relatively excellent anti-corrosion performance.
[0065] Furthermore, according to basic heat transfer concepts, the radiative heat between two surfaces at any given location is related to the solid angle between them. That is, the larger the angle between the wing 13b and the flat base tube 13a, the worse the radiative heat transfer effect, and consequently, the smaller the radiative heat transfer between the two surfaces. At the same time, given a fixed angle between the wing 13b and the flat base tube 13a, a larger surface area results in a greater total radiative heat transfer between the two surfaces, leading to a better heat transfer effect. Therefore, a better heat dissipation effect can be achieved by adjusting the surface area (shape) of the wing 13b and the fin angle between it and the flat base tube 13a.
[0066] Preferably, in this embodiment, the wing 13b on the wing flat tube 13 is any one of straight, arc, and corrugated type. The corrugated type includes flat wave, sine wave, trapezoidal tooth wave, and triangular tooth wave, etc. In terms of heat dissipation effect, corrugated type > arc type > straight type, but the sine wave has the best heat dissipation effect among the corrugated types.
[0067] It should be noted that if the spacing between the winglets 13b is too small, the height of the winglets 13b is too high, or the fin angle between the winglets 13b and the flat base tube 13a is too small, the projections of the winglets 13b on the plane containing the side of the flat base tube 13a will overlap, which is not conducive to heat dissipation. Therefore, preferably, the winglets 13b on the wing-flat tube 13 are corrugated and sinusoidal, with a preferred wave height of 3mm and a preferred wavelength of 6mm. The fin angle θ between the winglets 13b on each wing-flat tube 13 and the flat base tube 13a is 30~60°. The distribution spacing of the winglets 13b on each wing-flat tube 13 on the base tube can be consistent or inconsistent; and the distribution spacing is maintained at 1~20mm. More preferably, the distribution spacing is maintained at 6, 8, 10, or 12mm.
[0068] The wing 13b on the winged flat tube 13 can be perpendicular or inclined to the length direction of the plane of the flat base tube 13a on which it is located; for example Figure 13 As shown, when the flying wing 13b is tilted along the length direction of the plane of its flat base tube 13a, the included angle β between the two is 75~83°.
[0069] Example 5
[0070] See Figures 14-16 Based on embodiments 1-4, this embodiment adds an air guide shroud 4 to the radiator. The air guide shroud 4 is a cylindrical structure with openings at the top and bottom, and the heat dissipation core 1 is centrally located inside the air guide shroud 4. The design and application of the air guide shroud 4 is actually similar to a highly efficient "chimney" mechanism, which can effectively concentrate and guide the rising hot airflow around the heat dissipation fin assembly 12 and the bottom of the radiator. This concentration effect promotes the formation of forced convection, which not only significantly improves the convective heat transfer coefficient, but also quickly removes heat from the radiator surface, ensuring the efficient operation of the entire radiator.
[0071] When the air guide shroud 4 is located on the upper part of the radiator, that is, the top of the oil inlet structure 2 and the heat dissipation core 1 are wrapped inside the air guide shroud 4, the heat dissipation efficiency is significantly improved. In actual use, the height of the air guide shroud 4, that is, the length of the air guide channel, can be adjusted according to specific needs.
[0072] Based on this, when the lower part of the radiator is also provided with an air guide shroud 4, that is, the bottom of the oil outlet structure 3 and the heat dissipation core 1 are wrapped in the air guide shroud 4, the heat dissipation effect is basically the same as that of only providing an air guide shroud 4 at the upper part of the radiator.
[0073] Alternatively, the air guide shroud 4 can be wrapped around the entire outside of the radiator.
[0074] In this embodiment, the geometry of the air guide shroud 4 is designed as a cylindrical or cuboid structure with a constant diameter from top to bottom. This regular shape ensures the stability of airflow. However, if heat dissipation is desired, the longitudinal cross-section of the air guide shroud 4 can be designed as a trapezoid, conical, or hyperbola. This design of the inner wall structure of the air guide shroud 4 effectively promotes airflow guidance, facilitates the upward convergence of air, and thus enhances the efficiency of convective heat dissipation.
[0075] Preferably, an airflow channel of a certain size is provided between the outer side of the heat dissipation core 1 and the inner wall of the air guide shroud 4 to facilitate the airflow around the heat dissipation core.
[0076] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A self-cooling flying-wing type radiator for transformer, comprising a heat dissipation core, an oil inlet structure and an oil outlet structure; the oil inlet structure and the oil outlet structure are symmetrically arranged at the oil inlet side and the oil outlet side of the heat dissipation core; characterized in that: the heat dissipation core comprises a mechanical structure frame and M heat dissipation fin groups arranged transversely in the mechanical structure frame; each heat dissipation fin group comprises N flying-wing flat tubes arranged longitudinally, wherein M and N are both natural numbers greater than 1; the flying-wing flat tube comprises a flat base tube and a flying wing integrally formed by cutting on the flat base tube; the oil inlet side and the oil outlet side of each heat dissipation fin group are connected to the oil inlet structure and the oil outlet structure through the longitudinally arranged tube bundle end plate respectively; the tube bundle end plate has a hole corresponding to the oil circuit of the flying-wing flat tube; the tube bundle end plate is integrally connected to the mechanical structure frame at both ends; the oil inlet structure or the oil outlet structure comprises a plurality of oil collecting chambers corresponding to the tube bundle end plate on the same side and a mother tube; one side of the oil collecting chamber is attached to and connected to the corresponding tube bundle end plate, and the mother tube is arranged on the other side of the oil collecting chamber; both sides of the oil collecting chamber are provided with corresponding oil passing holes to realize the oil circuit communication among the oil inlet structure, the heat dissipation core and the oil outlet structure.
2. The self-cooling flying wing type heat sink for a transformer according to claim 1, characterized by: The mother tube intersects all the oil collecting chambers on the same side.
3. The self-cooling flying wing type heat sink for a transformer according to claim 1, characterized by: A manifold is arranged between the mother tube and each oil collecting chamber; one end of the manifold is connected to the mother tube, and the other end is connected to the oil collecting chamber.
4. The self-cooling flying wing type heat sink for a transformer according to claim 1, characterized by: All the flying-wing flat tubes are arranged in any one of orthogonal arrangement, oblique arrangement, angular column forward arrangement, angular column reverse arrangement, human column forward arrangement or human column reverse arrangement.
5. The self-cooling flying wing heat sink for a transformer according to claim 1, characterized by: The flying wings on the flying-wing flat tubes are in any one of straight line type, arc line type and corrugated type.
6. The self-cooling flying wing type heat sink for a transformer according to claim 5, characterized by: The corrugated type includes straight wave, sine wave, trapezoidal tooth wave and triangular tooth wave.
7. The self-cooling flying wing type heat sink for a transformer according to claim 1, characterized by: The fin angle between the flying wing on each flying-wing flat tube and the flat base tube is 30-60°; And / or, the flying wing on the flying-wing flat tube can be perpendicular or inclined to the length direction of the flat base tube plane.
8. The self-cooling flying wing heat sink for a transformer according to claim 1, characterized by: The distribution spacing of the flying wings on each flying-wing flat tube on the base tube can be consistent or inconsistent; and the distribution spacing is maintained at 1-20 mm.
9. The self-cooling flying wing heat sink for a transformer according to claim 1, characterized by: Further comprising a wind deflector; the wind deflector is a cylinder structure with upper and lower openings, and the heat dissipation core is arranged centrally inside the wind deflector.
10. The self-cooling flying wing heat sink for a transformer according to claim 1, characterized by: The mechanical structure frame is integral, that is, the heat dissipation core comprises two frame plates in front and back and is connected as a whole through upper and lower tube bundle end plates; the heat dissipation core is embedded in the mechanical structure frame as a whole.