Radiator and transformer

Abstract

The utility model discloses a radiator and a transformer, and relates to the technical field of transformers, the radiator comprises an oil collecting pipe and a plurality of cooling fins, and the oil collecting pipe is connected with the cooling fins and communicates with cooling runners in the cooling fins; mounting rings are arranged on the cooling fins, the mounting rings protrude out of at least one side face of the cooling fins in the axial direction, a plurality of mounting holes allowing fasteners to penetrate through are distributed in the cooling fins, and every two adjacent cooling fins are arranged in the axial direction of the mounting rings and connected through the fasteners. According to the technical scheme, the installation rings and the installation holes are arranged on the cooling fins, the adjacent cooling fins can be rapidly assembled through the fasteners, operation space does not need to be reserved, and therefore the size of the radiator is reduced.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and in particular to a radiator and a transformer. Background Technology

[0002] As a crucial component of transformers, the radiator typically comprises upper and lower oil collecting pipes and heat dissipation fins. The fins are welded to the oil collecting pipes. However, existing welding machines require considerable space, necessitating a significant operating distance between adjacent fins. With increasing transformer capacity, the demands on radiator heat dissipation performance also rise, leading to an increase in the number of heat dissipation fins and the length of the oil collecting pipes, ultimately resulting in larger radiator dimensions. Utility Model Content

[0003] The main objective of this application is to provide a radiator and transformer designed to reduce the size of the radiator.

[0004] To achieve the above objectives, the radiator proposed in this application includes an oil collection pipe and a plurality of heat dissipation fins. The oil collection pipe connects to the plurality of heat dissipation fins and communicates with the heat dissipation channels within the heat dissipation fins. Each heat dissipation fin is provided with a mounting ring, which protrudes axially from at least one side of the heat dissipation fin. The heat dissipation fin has a plurality of mounting holes for fasteners to pass through. Two adjacent heat dissipation fins are arranged axially along the mounting ring and connected by the fasteners.

[0005] In one embodiment, the plurality of mounting holes include staggered first and second holes, the plurality of heat sinks include a first heat sink, a second heat sink, and a third heat sink, the second heat sink being disposed between the first and third heat sinks, and the fasteners include a first fastener and a second fastener, the first fastener passing through the first holes on the first and second heat sinks, and the second fastener passing through the second holes on the second and third heat sinks.

[0006] In one embodiment, the mounting ring has an oil passage cavity, and multiple oil passage cavities are connected to form an oil passage channel, with the heat dissipation channel communicating with the oil passage channel.

[0007] In one embodiment, a sealing ring is provided between two adjacent mounting rings, and the sealing ring is disposed around the outer periphery of the oil passage.

[0008] In one embodiment, the mounting ring is recessed with a sealing ring groove, the sealing ring is fitted into the sealing ring groove, and a plurality of mounting holes are arranged around the outer periphery of the sealing ring groove.

[0009] In one embodiment, the oil collecting pipe passes through the oil passage and abuts against the inner peripheral wall of the oil passage, and the oil collecting pipe has a plurality of oil passage holes communicating with the oil passage.

[0010] In one embodiment, the inner peripheral wall of the oil passage is recessed with an oil channel groove, which communicates with the heat dissipation channel and corresponds to the oil passage hole.

[0011] In one embodiment, the radiator further includes an end plate that covers one axial end of the oil collection pipe and is connected to an outer mounting ring by fasteners.

[0012] In one embodiment, the heat sink and the mounting ring are formed separately and then connected as a whole.

[0013] In one embodiment, the heat sink and the mounting ring are connected by welding.

[0014] In one embodiment, the mounting ring is provided with an oil passage groove, and the heat dissipation channel is connected to the oil passage through the oil passage groove.

[0015] In one embodiment, the axial thickness of the mounting ring is less than or equal to 25 mm.

[0016] In one embodiment, the heat sink is provided with a plurality of mounting rings.

[0017] In one embodiment, a plurality of the mounting holes are distributed circumferentially at intervals on the mounting ring.

[0018] This application also proposes a transformer that includes the aforementioned radiator.

[0019] The technical solution of this application enables rapid assembly with fasteners by setting mounting rings and mounting holes on the heat sink. No operating space needs to be reserved between adjacent heat sinks, and their spacing is greatly reduced, thereby reducing the size of the heat sink. This allows the center of gravity of the heat sink to be closer to the oil tank, thereby reducing the risk of oil leakage caused by transportation bumps at the installation point of the heat sink and the oil tank. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a heat sink embodiment provided in this application;

[0022] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 for Figure 1 Cross-sectional view of the radiator;

[0024] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0025] Figure 5 for Figure 4 Cross-sectional view of the oil collection pipe removed from the oil passage;

[0026] Figure 6 for Figure 1 A schematic diagram of the structure of a heat sink in one embodiment;

[0027] Figure 7 for Figure 6 Schematic diagram of the mounting ring structure;

[0028] Figure 8 for Figure 7 Cross-sectional view of the mounting ring;

[0029] Figure 9 for Figure 1 A schematic diagram of the structure of an embodiment of the oil gathering pipe;

[0030] Figure 10 A schematic diagram of the structure of an embodiment of the transformer provided in this application;

[0031] Figure 11 for Figure 10 A magnified view of a section at point C.

[0032] Explanation of icon numbers:

[0033] 10. Radiator; 20. Oil tank; 30. Flange; 100. Heat sink fins; 200. Mounting ring; 300. Fastener; 400. Oil passage; 500. Sealing ring; 600. Oil collection pipe; 610. Oil passage hole; 700. End plate; 110. First heat sink fin; 120. Second heat sink fin; 130. Third heat sink fin; 140. Heat dissipation channel; 210. Mounting hole; 211. First hole position; 212. Second hole position; 220. Oil passage cavity; 230. Sealing ring groove; 240. Oil passage groove; 310. First fastener; 320. Second fastener.

[0034] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] This application proposes a radiator 10.

[0039] Please see Figure 1 and Figure 6 In one embodiment of this application, the radiator 10 includes an oil collection pipe 600 and a plurality of heat sinks 100. The oil collection pipe 600 connects to the plurality of heat sinks 100 and communicates with the heat dissipation channel 140 inside the heat sink 100. The heat sink 100 is provided with a mounting ring 200, which protrudes axially from at least one side of the heat sink 100. The heat sink 100 is provided with a plurality of mounting holes 210 for fasteners 300 to pass through. Two adjacent heat sinks 100 are arranged axially along the mounting ring 200 and connected by fasteners 300.

[0040] Specifically, the heat sink 100 is composed of stacked metal sheets, and the material of the heat sink 100 can be a material with good thermal conductivity, such as aluminum or copper. A narrow heat dissipation channel 140 is formed between two adjacent layers of metal sheets, which serves as the flow path for the insulating oil inside the transformer. The insulating oil enters the heat dissipation channel 140 within the heat sink 100, and during its flow, the heat of the insulating oil can be conducted to the outside air through the metal sheets. The cooled insulating oil then leaves the heat sink 100 and returns to the oil tank 20.

[0041] The oil collecting pipe 600 can guide the flow of insulating oil. The oil collecting pipe 600 guides the insulating oil to the heat dissipation channel 140 in the heat sink 100, or returns the insulating oil in the heat dissipation channel 140 to the oil tank 20, thereby achieving effective heat transfer.

[0042] A mounting ring 200 is disposed on the heat sink 100 and protrudes axially from at least one side of the heat sink 100. The mounting ring 200 can be installed on one side of the heat sink 100, so that the mounting ring 200 protrudes axially from that side of the heat sink 100; alternatively, the mounting ring 200 can penetrate both opposite sides of the heat sink 100, so that the mounting ring 200 protrudes axially from both opposite sides of the heat sink 100. The design of the mounting ring 200 provides positioning for the connection between adjacent heat sinks 100, ensuring a gap between adjacent heat sinks 100 to guarantee air convection and facilitate heat dissipation. When the mounting ring 200 protrudes from both opposite sides of the heat sink 100, adjacent mounting rings 200 abut against each other to ensure precise alignment of the heat sink 100 during assembly.

[0043] The heat sink 100 has multiple mounting holes 210 for fasteners 300 to pass through. Two adjacent heat sinks 100 are arranged and connected together along the axial direction of the mounting ring 200 by fasteners 300. The mounting holes 210 can be provided on the mounting ring 200 or on the sheet material of the heat sink 100.

[0044] Multiple heat sinks 100 are quickly connected via fasteners 300, eliminating the traditional welding process. No operating space is needed between adjacent heat sinks 100 to avoid welding machines, significantly reducing the spacing between them. With the same number of heat sinks 100, the overall size of the radiator 10 is greatly reduced. Furthermore, the innermost heat sink 100 can be directly installed to the flange 30 on the transformer's oil tank 20 via the mounting holes 210, eliminating the need for pre-installed installation space and further reducing the overall size. This shifts the center of gravity of the radiator 10 closer to the oil tank 20, reducing the risk of oil leakage at the connection points of adjacent heat sinks 100 and at the installation point between the radiator 10 and the oil tank 20 during transportation. The size of the radiator 10 refers to the length of the multiple heat sinks 100 along their arrangement direction.

[0045] Meanwhile, the radiator 10 is assembled from multiple heat sinks 100. If any one heat sink 100 is damaged, it can be replaced without rendering the entire unit unusable. Compared to the traditional design where the heat sink and oil collection pipe are welded together, the distance between adjacent heat sinks 100 is too small, making it difficult to evenly apply paint or powder coating during surface treatment, resulting in insufficient corrosion resistance. In contrast, each heat sink 100 of the radiator 10 of this invention can be individually coated, ensuring even application of paint or powder coating and achieving the required corrosion resistance.

[0046] Furthermore, the quick-connection of multiple heat sinks 100 via fasteners 300 simplifies and simplifies the assembly process of the heat sink 10, reducing assembly time and costs. The number and arrangement of the heat sinks 100 can also be flexibly adjusted according to actual needs, making it suitable for transformers of different power and size, exhibiting strong versatility and adaptability.

[0047] The technical solution of this application enables rapid assembly by setting mounting rings 200 and mounting holes 210 on the heat sink 100 and fasteners 300. No operating space needs to be reserved between adjacent heat sinks 100, and their spacing is greatly reduced, thereby reducing the size of the radiator 10. This allows the center of gravity of the radiator 10 to be closer to the oil tank 20, thereby reducing the risk of oil leakage at the installation point of the radiator 10 and the oil tank 20 due to transportation bumps.

[0048] In one implementation, please refer to Figure 1 and Figure 2The plurality of mounting holes 210 include staggered first hole positions 211 and second hole positions 212. The plurality of heat sinks 100 include a first heat sink 110, a second heat sink 120 and a third heat sink 130. The second heat sink 120 is disposed between the first heat sink 110 and the third heat sink 130. The fastener 300 includes a first fastener 310 and a second fastener 320. The first fastener 310 passes through the first hole position 211 on the first heat sink 110 and the second heat sink 120. The second fastener 320 passes through the second hole position 212 on the second heat sink 120 and the third heat sink 130.

[0049] Each heat sink 100 has multiple mounting holes 210, which are divided into first hole positions 211 and second hole positions 212, and are arranged in an alternating manner. Fasteners 300 include first fasteners 310 and second fasteners 320, corresponding to the first hole positions 211 and 212 respectively. The first heat sink 110 and the second heat sink 120 are connected via the first hole position 211 using the first fastener 310, and the second heat sink 120 and the third heat sink 130 are connected via the second hole position 212 using the second fastener 320. The third heat sink 130 is then connected to the next heat sink 100 via the first hole position 211 using the first fastener 310, and so on, thereby achieving rapid connection of multiple heat sinks 100. Meanwhile, by arranging the first hole 211 and the second hole 212 alternately, the force on the connection point can be effectively distributed, avoiding structural deformation or loosening due to excessive force in one direction, thereby improving the overall stability of the connection.

[0050] In one implementation, please refer to Figure 1 , Figures 3 to 5 The mounting ring 200 has an oil passage cavity 220, and multiple oil passage cavities 220 are connected to form an oil passage channel 400. The heat dissipation channel 140 in the heat sink 100 is connected to the oil passage channel 400.

[0051] The mounting ring 200 specifically penetrates the oil passage cavity 220. Multiple mounting rings 200 are connected sequentially along their axial direction, and the corresponding oil passage cavities 220 are interconnected, forming a complete oil passage 400. The oil passage 400 communicates with the oil tank 20 to guide the insulating oil into and out of the radiator 10. The heat sink 100 has a heat dissipation channel 140 inside, which communicates with the oil passage 400 in the mounting ring 200. The insulating oil enters the heat dissipation channel 140 through the oil passage 400, dissipates heat while flowing through the heat sink 100, and finally flows out of the radiator 10 and back into the oil tank 20. The mounting ring 200 serves both as a mounting structure and forms part of the oil passage 400, combining the functions of mounting and oil pipe. This makes the structure of the radiator 10 more compact, reduces the number of components in the radiator 10, and simplifies the overall structure of the radiator 10.

[0052] In other embodiments, the mounting ring 200 may also serve as a mounting structure, and the mounting ring 200 may be provided in the form of a boss. An oil passage 400 can be formed by additionally providing an oil passage section to allow the insulating oil to flow.

[0053] In one implementation, please refer to Figures 1 to 4 A sealing ring 500 is provided between two adjacent mounting rings 200, and the sealing ring 500 is arranged around the outer periphery of the oil passage 400.

[0054] The sealing ring 500 prevents insulating oil in the oil passage 400 from leaking out from the connection between adjacent mounting rings 200. By tightly fitting the surfaces of adjacent mounting rings 200, the sealing ring 500 forms a sealing barrier, preventing insulating oil from overflowing from the oil passage 400 and ensuring the tightness of fluid circulation inside the radiator 10. The sealing ring 500 has a certain degree of elasticity, allowing it to adapt to minor deformations or vibrations between the mounting rings 200, maintaining a good sealing effect.

[0055] In one implementation, please refer to Figure 2 , Figure 4 , Figure 7 and Figure 8 The mounting ring 200 has a recessed sealing ring groove 230, the sealing ring 500 is fitted into the sealing ring groove 230, and multiple mounting holes 210 are arranged around the outer periphery of the sealing ring groove 230.

[0056] A sealing ring groove 230 is recessed on the mounting ring 200 to accommodate the sealing ring 500. The design of the sealing ring groove 230 ensures that the sealing ring 500 can be firmly held on the mounting ring 200, preventing it from shifting due to vibration or pressure, thereby ensuring the stability of the sealing effect. Moreover, the sealing ring 500 being held in the sealing ring groove 230 also reduces the potential damage to the sealing ring 500 during installation and prevents gaps between adjacent mounting rings 200 due to the sealing ring 500. Multiple mounting holes 210 are arranged around the outer periphery of the sealing ring groove 230, so that the fastener 300 will not interfere with the function of the sealing ring groove 230 and the sealing ring 500 when connecting the heat sink 100. At the same time, the sealing ring 500 can also prevent insulating oil in the oil passage 400 from contaminating the mounting holes 210 and the fastener 300.

[0057] In other embodiments, a sealing coating (such as polyurethane, epoxy resin, etc.) can be applied to the contact surfaces of the two mounting rings 200 to achieve a seal through the physical or chemical properties of the coating.

[0058] In one implementation, please refer to Figure 1 , Figure 4 and Figure 9 The oil collecting pipe 600 passes through the oil passage 400 and abuts against the inner peripheral wall of the oil passage 400. The oil collecting pipe 600 has multiple oil passage holes 610 that communicate with the oil passage 400.

[0059] The oil collecting pipe 600 passes through the oil passage 400, and its outer wall abuts against the inner circumferential wall of the oil passage 400, ensuring that all heat sinks 100 are installed in the same horizontal position. Under high temperature or high pressure environments, this effectively prevents the oil passage 400 from deforming due to thermal expansion and contraction or pressure changes. Simultaneously, the oil collecting pipe 600 also guides the flow of insulating oil. Multiple oil passage holes 610 are provided on the oil collecting pipe 600. These holes are used to distribute insulating oil from inside the oil collecting pipe 600 into the oil passage 400, or to reintroduce it from the oil passage 400 into the oil collecting pipe 600. After entering the oil passage 400 through the oil passage holes 610, the insulating oil is redistributed to the heat dissipation channels 140 within the heat sinks 100, thereby achieving effective heat transfer. The oil passage 610 on the oil collection pipe 600 can evenly distribute the flow of insulating oil, avoiding local flow that is too large or too small, thereby improving the flow efficiency of insulating oil in the entire radiator 10, ensuring that the insulating oil can fully cover all heat sinks 100, and improving heat dissipation performance.

[0060] In other embodiments, the mounting ring 200 has a positioning hole on one side and a corresponding positioning protrusion on the other side, and the positioning protrusion on the mounting ring 200 is embedded in the positioning hole on another adjacent mounting ring 200. Alternatively, the positioning hole passes through the two end faces of the mounting ring 200 in the axial direction, and the positioning rod passes through multiple positioning holes on the mounting rings 200.

[0061] In one implementation, please refer to Figure 4 and Figure 5 The inner peripheral wall of the oil passage 400 is recessed with an oil channel groove 240, which is connected to the heat dissipation channel 140 and corresponds to the oil passage hole 610.

[0062] The position of the oil channel 240 corresponds to the oil passage hole 610 on the oil collecting pipe 600, allowing insulating oil to flow into the oil channel 240 through the oil passage hole 610, and then be distributed by the oil channel 240 to the heat dissipation channel 140, ensuring a more precise and smooth flow path for the insulating oil. The width of the oil channel 240 is larger than the width of the heat dissipation channel 140, allowing the insulating oil to flow more smoothly from the oil passage 400 into the heat dissipation channel 140, avoiding problems such as uneven flow or blockage.

[0063] In other embodiments, the oil passage groove 240 may not be provided, the oil passage hole 610 corresponds to the heat dissipation channel 140 and is directly connected, and a guide slope is provided at the connection between the heat dissipation channel 140 and the oil passage hole 610.

[0064] In one implementation, please refer to Figure 4 and Figure 9 The radiator 10 also includes an end plate 700, which covers one end of the oil collection pipe 600 in the axial direction and is connected to the outer mounting ring 200 by fasteners.

[0065] End plate 700 seals one end of oil collecting pipe 600 to prevent insulating oil leakage. End plate 700 can be machined separately from oil collecting pipe 600 and then connected as a single unit, or it can be integrally formed, or it can be connected only to the outer mounting ring 200. End plate 700, connected to the outer mounting ring 200, serves to securely mount oil collecting pipe 600. The outer mounting ring 200 refers to the mounting ring 200 on the radiator 10 furthest from the oil tank 20, and end plate 700 seals the side of this mounting ring 200 facing away from the oil tank 20. The other end of oil collecting pipe 600 without end plate 700 is connected to oil tank 20 to facilitate the flow of insulating oil between oil collecting pipe 600 and oil tank 20.

[0066] In other embodiments, the end plate 700 is integrally formed with the outer mounting ring 200.

[0067] In one embodiment, the heat sink 100 and the mounting ring 200 are formed separately and then connected as one unit.

[0068] The heat sink 100 and mounting ring 200 are manufactured independently using different processes or materials, simplifying the complex overall molding process and reducing manufacturing difficulty and cost. Each component can be processed and quality inspected individually, improving production efficiency and yield. Furthermore, the heat sink 100 and mounting ring 200 can be selected based on their respective functional requirements, choosing the optimal materials and processing techniques. For example, the heat sink 100 can use materials with high thermal conductivity, such as aluminum or copper; the mounting ring 200 can use materials with higher strength, such as aluminum alloy or steel. The separately molded heat sink 100 and mounting ring 200 are then connected as a single unit through welding or riveting.

[0069] In other embodiments, the heat sink 100 and the mounting ring 200 are configured as a single piece, with no connection gap between the heat sink 100 and the mounting ring 200, which helps to reduce the problem of insulating oil leakage.

[0070] In one embodiment, the heat sink 100 and the mounting ring 200 are connected by welding.

[0071] After being separately formed, the heat sink 100 and the mounting ring 200 are firmly connected together by welding to form a high-strength mating surface, ensuring that they will not loosen or separate. This also achieves a seamless connection between the heat sink 100 and the mounting ring 200, enhancing the overall rigidity and sealing of the heat sink 10, reducing contact thermal resistance, and improving heat transfer efficiency.

[0072] In other embodiments, the heat sink 100 and the mounting ring 200 can also be connected by riveting.

[0073] In one implementation, please refer to Figure 4 and Figure 5 The mounting ring 200 is provided with an oil passage groove 240, and the heat dissipation channel 140 is connected to the oil passage 400 through the oil passage groove 240.

[0074] The oil channel groove 240 is set on the mounting ring 200. The oil channel groove 240 is easier to process. It can be directly formed on the mounting ring 200 by precision mold or machining. The manufacturing process is relatively simple and low cost, and it does not affect the overall structure of the heat sink 100.

[0075] In other embodiments, the oil channel 240 is formed at the junction of the heat dissipation channel 140 and the oil passage 400.

[0076] In one embodiment, the axial thickness of the mounting ring 200 is less than or equal to 25 mm.

[0077] When the axial thickness of the mounting ring 200 is 25mm, the gap between the two heat sinks 100 is less than 25mm. Traditionally, adjacent heat sinks welded together require a minimum spacing of 40mm. Taking a radiator 10 assembled from 20 heat sinks 100 as an example, the overall size of a traditional radiator is 910mm, while the overall size of the radiator 10 proposed in this invention is 510mm (the end of the oil collection pipe 600 connected to the oil tank 20 protrudes from the surface of the heat sink 100 near the oil tank 20, and the overall size of the radiator 10 is greater than the product of the number of heat sinks 100 and the axial thickness of the mounting ring 200). With the same number of heat sinks 100, the overall size of the radiator 10 can be reduced by 35% to 50%, and the center of gravity of the radiator 10 can be closer to the oil tank 20, thereby reducing the risk of oil leakage at the installation point of the radiator 10 and the oil tank 20 due to transportation bumps.

[0078] In one implementation, please refer to Figure 10 and Figure 11 A flange 30 is welded onto the oil tank 20, and the axial thickness of the flange 30 is generally 20mm. The radiator 10 is mounted on the oil tank 20 via a mounting ring 200. The mounting ring 200 and the flange 30 are connected by fasteners, and the axes and diameters of the mounting ring 200 and the flange 30 are the same. A sealing ring is provided between the mounting ring 200 and the flange 30 to prevent insulating oil from leaking from the connection between the mounting ring 200 and the flange 30.

[0079] In one implementation, please refer to Figure 1 and Figure 6 The heat sink 100 is provided with multiple mounting rings 200.

[0080] The design of multiple mounting rings 200 enhances the connection strength between the heat sinks 100, increases the number of connection points between the heat sinks 100, distributes the stress, and avoids loosening or damage caused by excessive stress at a single point. The oil passage cavities 220 within the multiple mounting rings 200 are interconnected, forming a more complex network of oil passage channels 400, while providing more path options for the flow of insulating oil. In the working state, each heat sink 100 has at least one mounting ring 200 at its upper and lower ends. The oil passage channel 400 formed by the mounting ring 200 at the upper end guides the insulating oil in the oil tank 20 into the heat dissipation channel 140, while the oil passage channel 400 formed by the mounting ring 200 at the lower end guides the insulating oil in the heat dissipation channel 140 back to the oil tank 20.

[0081] In one implementation, please refer to Figure 7 Multiple mounting holes 210 are distributed circumferentially on the mounting ring 200.

[0082] Mounting holes 210 are provided on the mounting ring 200 and evenly distributed along the circumference of the mounting ring 200, so that the connection points between the heat sinks 100 are evenly distributed, dispersing the force and avoiding loosening or damage caused by excessive force at a single point. At the same time, the mounting ring 200 significantly improves the structural stability of the entire heat sink 10 through multi-point connection. In addition, it is easier to machine the mounting holes 210 on the mounting ring 200.

[0083] In other embodiments, mounting holes 210 may also be provided on the heat sink 100, with the mounting holes 210 spaced apart along the edge of the sheet of the heat sink 100. The mounting holes 210 may be offset from the heat dissipation channel 140, or they may pass through the heat dissipation channel 140, and a sealing structure may be provided around the mounting holes 210.

[0084] This application also proposes a transformer, which includes a radiator 10. The specific structure of the radiator 10 is as described in the above embodiments. Since this transformer adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0085] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A radiator (10), characterized in that, It includes an oil collection pipe (600) and a plurality of heat sinks (100). The oil collection pipe (600) connects to the plurality of heat sinks (100) and communicates with the heat dissipation channels (140) inside the heat sinks (100). The heat sinks (100) are provided with mounting rings (200), which protrude axially from at least one side of the heat sinks (100). The heat sinks (100) are provided with a plurality of mounting holes (210) for fasteners (300) to pass through. Two adjacent heat sinks (100) are arranged along the axial direction of the mounting rings (200) and connected by the fasteners (300).

2. The radiator (10) as claimed in claim 1, characterized in that, The plurality of mounting holes (210) include staggered first holes (211) and second holes (212), the plurality of heat sinks (100) include a first heat sink (110), a second heat sink (120) and a third heat sink (130), the second heat sink (120) is disposed between the first heat sink (110) and the third heat sink (130), the fastener (300) includes a first fastener (310) and a second fastener (320), the first fastener (310) passes through the first holes (211) on the first heat sink (110) and the second heat sink (120), and the second fastener (320) passes through the second holes (212) on the second heat sink (120) and the third heat sink (130).

3. The radiator (10) as described in claim 1, characterized in that, The mounting ring (200) has an oil passage cavity (220), and multiple oil passage cavities (220) are connected to form an oil passage channel (400). The heat dissipation channel (140) is connected to the oil passage channel (400).

4. The radiator (10) as described in claim 3, characterized in that, A sealing ring (500) is provided between two adjacent mounting rings (200), and the sealing ring (500) is arranged around the outer periphery of the oil passage (400).

5. The radiator (10) as described in claim 4, characterized in that, The mounting ring (200) is recessed with a sealing ring groove (230), the sealing ring (500) is fitted into the sealing ring groove (230), and a plurality of mounting holes (210) are arranged around the outer periphery of the sealing ring groove (230).

6. The radiator (10) as claimed in claim 3, characterized in that, The oil collecting pipe (600) passes through the oil passage (400) and abuts against the inner peripheral wall of the oil passage (400). The oil collecting pipe (600) has a plurality of oil passage holes (610) communicating with the oil passage (400).

7. The radiator (10) as claimed in claim 6, characterized in that, The inner peripheral wall of the oil passage (400) is recessed with an oil channel groove (240), which is connected to the heat dissipation channel (140) and corresponds to the oil passage hole (610).

8. The radiator (10) as claimed in claim 6, characterized in that, The radiator (10) also includes an end plate (700), which covers one end of the oil collection pipe (600) in the axial direction and is connected to the outer mounting ring (200) by fasteners (300).

9. The radiator (10) as claimed in claim 3, characterized in that, The heat sink (100) and the mounting ring (200) are formed separately and then connected as one unit.

10. The radiator (10) as claimed in claim 9, characterized in that, The heat sink (100) and the mounting ring (200) are connected by welding; And / or, the mounting ring (200) is provided with an oil passage groove (240), and the heat dissipation channel (140) is connected to the oil passage channel (400) through the oil passage groove (240); And / or, the axial thickness of the mounting ring (200) is less than or equal to 25 mm.

11. The radiator (10) as claimed in any one of claims 1 to 10, characterized in that, The heat sink (100) is provided with a plurality of mounting rings (200); And / or, a plurality of the mounting holes (210) are distributed circumferentially at intervals on the mounting ring (200).

12. A transformer, characterized in that, Includes the radiator (10) as described in any one of claims 1 to 11.

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