Finned radiator for transformer

Abstract

The invention relates to the technical field of transformer oil coolers, and discloses a finned radiator for a transformer, which comprises a plurality of parallel radiating fins, and a flow changing mechanism is arranged in each radiating fin and is used for forcibly changing oil flow in the radiating fins, destroying thermal resistance of a boundary layer and enhancing a radiating effect; the flow changing mechanism comprises a hollow swing shaft transversely penetrating through the center line of the cooling fins, flexible flow guiding bodies distributed on the two sides of the hollow swing shaft and a driving mechanism. The flexible flow guiding bodies on the two sides are connected with the hollow swing shaft and the cooling fins in a sealed mode through the soft rubber walls, and through type air channels are formed in the flexible flow guiding bodies and the hollow swing shaft and used for air circulation. Through the variable flow mechanism, the heat dissipation efficiency is remarkably improved. A hollow swing shaft in the variable flow mechanism and a flexible flow guide body work cooperatively, and a dynamic longitudinal vortex field is generated in an inner oil way of the cooling fins. The design not only effectively destroys the boundary layer thermal resistance of oil flow, but also promotes uniform distribution and rapid dissipation of heat.

Description

Technical Field

[0001] The present invention relates to the field of transformer oil coolers, and more particularly to a plate-type radiator for transformers. Background Art

[0002] Transformers play a vital role in the power system. During their operation, they generate a large amount of heat. This heat mainly comes from the resistance loss, magnetic resistance loss and additional loss of metal structural parts inside the transformer. If the heat cannot be dissipated in a timely and effective manner, the transformer temperature will be too high, which will accelerate the aging of the insulation material and shorten the service life of the equipment.

[0003] Existing transformer fin heat sinks typically use a straight-through oil path design, where the oil flows only once inside the heat sink, resulting in insufficient contact time with the heat sink, which prevents sufficient heat transfer to the external environment. Conventional heat sinks only allow high-temperature oil to flow around the radiator once, resulting in a linear oil flow path and low heat dissipation efficiency.

[0004] Under natural oil circulation, the cooling oil forms a low-velocity boundary layer near the inner wall of the heat sink, hindering heat transfer. Traditional heat sink designs, such as straight edges and small angles, cannot effectively break up this boundary layer, resulting in slow oil flow and low heat dissipation efficiency. To address this issue, we propose a fin-type heat sink for transformers. Summary of the Invention

[0005] The present invention provides a fin-type heat sink for a transformer, which solves the technical problem in the related art that the traditional heat sink design cannot effectively destroy the boundary layer, resulting in slow oil flow speed and low heat dissipation efficiency.

[0006] The present invention provides a fin-type heat sink for a transformer, comprising: a plurality of mutually parallel heat sinks, wherein a flow conversion mechanism is provided inside the heat sink to forcibly change the oil flow in the heat sink, destroy the boundary layer thermal resistance, and enhance the heat dissipation effect;

[0007] The flow conversion mechanism includes a hollow swing shaft that transversely passes through the center line of the heat sink, flexible guide bodies distributed on both sides of the hollow swing shaft, and a driving mechanism;

[0008] The flexible guide bodies on both sides are sealed with the hollow swing shaft and the heat sink through the soft rubber wall, and the flexible guide body and the hollow swing shaft form a through air channel for air circulation;

[0009] The driving mechanism is arranged at the end of the hollow swing shaft, and drives the hollow swing shaft through reciprocating swing at a preset angle, causing the flexible guide body to produce a wave-like deformation, alternately forming positive and reverse longitudinal eddy flow fields in the oil circuit inside the heat sink, thereby destroying the thermal resistance of the oil flow boundary layer.

[0010] Furthermore, an oil outlet pipe and an oil inlet pipe are fixedly provided at both ends of the heat sink, and the oil inlet pipe is connected to the oil outlet pipe through the heat sink. The cooling oil enters the heat sink through the oil inlet pipe and then flows into the oil outlet pipe from the end of the heat sink away from the oil inlet pipe.

[0011] Furthermore, the soft rubber wall includes soft rubber wall one and soft rubber wall two. Soft rubber wall two is located on the side close to the hollow swing shaft, and the flexible flow guide is fixed and sealed to the hollow swing shaft through soft rubber wall two. Soft rubber wall one is located on the side away from the hollow swing shaft, and the other side of the flexible flow guide is fixed and sealed to the heat sink through soft rubber wall one.

[0012] Furthermore, triangular prism-shaped guide blocks are fixedly provided at both ends of the flexible guide body, the thickness of the flexible guide body is smaller than the internal thickness of the heat sink, and the width of the flexible guide body is smaller than the width of the heat sink. The cooling oil flows through the gap between the inner wall of the heat sink and the outer wall of the flexible guide body.

[0013] Furthermore, the flexible body guide and the air passage inside the hollow swing shaft form a ventilation chamber, and the air flows through the gap between two adjacent heat sinks and the ventilation chamber, and is in contact with the air on four sides as a whole.

[0014] Furthermore, the hollow swing shaft includes a first force-bearing arm and a second force-bearing arm, both of which are fixedly connected to the end of the hollow swing shaft close to the driving mechanism, and the first force-bearing arm and the second force-bearing arm form a V-shaped structure.

[0015] Furthermore, a semicircular pressed groove 1 is provided on the first load-bearing arm, and a wavy pressed groove 2 is provided on the second load-bearing arm.

[0016] Furthermore, the drive motor includes a drive motor, a drive rod passing through the oil outlet pipe is fixedly provided at the rotating shaft end of the drive motor, a limit groove is provided on the drive rod corresponding to the oil outlet end of the heat sink, and a limit bearing is rotatably provided on the drive rod.

[0017] Furthermore, there are several limit grooves, which correspond to the heat sinks one by one. A pressure arm block is fixedly provided on the upper wall of the limit groove. The pressure arm block first rotates to the lowest end of the pressed groove one, and as it rotates to the edge of the pressed groove one, it pushes the force-bearing arm to swing down, driving the hollow swing shaft to rotate. The pressure arm block then rotates away from the force-bearing arm one and reaches the lowest end of the pressed groove two, gradually pressing down the force-bearing arm two.

[0018] Furthermore, a plurality of elastic water columns are provided in the ventilation chamber, and the water columns are arranged in two rows, located at both ends of the ventilation chamber to support the flexible flow-guiding body. At the same time, the water columns are interconnected and connected to a water pump through a hose. The control end of the water pump is connected to a temperature sensor, and the temperature sensor is installed inside one of the plurality of heat sinks.

[0019] The beneficial effects of the present invention are:

[0020] The present invention significantly improves heat dissipation efficiency through the flow conversion mechanism. The hollow swing shaft in the flow conversion mechanism works in conjunction with the flexible body guide to generate a dynamic longitudinal eddy current field in the oil path inside the heat sink. This design not only effectively destroys the boundary layer thermal resistance of the oil flow, but also promotes uniform distribution and rapid heat dissipation. The wavy deformation of the flexible body guide further enhances the disturbance of the oil flow, making the heat dissipation effect more prominent. This is of great significance for improving the operating stability of the transformer and extending its service life.

[0021] The drive mechanism achieves dynamic regulation of the oil flow in the oil circuit by precisely controlling the reciprocating swing of the hollow swing shaft. This design not only simplifies the structure of the radiator and reduces manufacturing costs, but also improves the reliability and durability of the radiator. At the same time, the setting of the through-type air channel allows air to flow smoothly, further enhancing the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the heat sink structure of the present invention;

[0024] Figure 3 It is a schematic diagram of a partially enlarged structure of the driving rod of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the heat sink of the present invention;

[0026] Figure 5 The present invention Figure 4 A in the middle is an enlarged schematic diagram;

[0027] Figure 6 It is a schematic diagram of the heat sink structure from the right side of the present invention;

[0028] Figure 7 It is a schematic diagram of the temperature sensor position structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the water column structure of the present invention.

[0030] In the figure: 11. Heat sink; 12. Oil outlet pipe; 13. Oil inlet pipe; 2. Driving mechanism; 21. Driving motor; 22. Driving rod; 23. Limit bearing; 24. Limit groove; 25. Pressure arm block; 3. Flow conversion mechanism; 31. Hollow swing shaft; 32. Force-bearing arm 1; 33. Force-bearing arm 2; 34. Pressed groove 1; 35. Pressed groove 2; 36. Soft rubber wall 1; 37. Guide block; 38. Flexible guide body; 39. Air passage chamber; 301. Soft rubber wall 2; 41. Water pump; 42. Temperature sensor; 43. Water column. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0032] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a fin-type heat sink for a transformer includes: a plurality of mutually parallel heat sinks 11, wherein a flow conversion mechanism 3 is provided inside the heat sink 11 for forcibly changing the oil flow in the heat sink 11, destroying the boundary layer thermal resistance, and enhancing the heat dissipation effect;

[0033] The flow conversion mechanism 3 includes a hollow swing shaft 31 that transversely passes through the center line of the heat sink 11, flexible guide bodies 38 distributed on both sides of the hollow swing shaft 31, and a driving mechanism 2;

[0034] The flexible guide bodies 38 on both sides are sealed with the hollow swing shaft 31 and the heat sink 11 through the soft rubber wall, and the flexible guide bodies 38 and the hollow swing shaft 31 form a through air channel for air circulation;

[0035] The driving mechanism 2 is arranged at the end of the hollow swing shaft 31, and drives the hollow swing shaft 31 by reciprocating swinging at a preset angle, causing the flexible guide body 38 to produce a wavy deformation, alternately forming positive and reverse longitudinal eddy flow fields in the oil circuit inside the heat sink 11, thereby destroying the thermal resistance of the oil flow boundary layer.

[0036] An oil outlet pipe 12 and an oil inlet pipe 13 are fixedly provided at both ends of the heat sink 11, and the oil inlet pipe 13 is connected to the oil outlet pipe 12 through the heat sink 11. The cooling oil enters the heat sink 11 through the oil inlet pipe 13, and then flows into the oil outlet pipe 12 from the end of the heat sink 11 away from the oil inlet pipe 13.

[0037] The soft rubber wall includes soft rubber wall 1 36 and soft rubber wall 2 301. Soft rubber wall 2 301 is located on the side close to the hollow swing shaft 31. The flexible flow guide 38 is fixed and sealed to the hollow swing shaft 31 through soft rubber wall 2 301. Soft rubber wall 1 36 is located on the side away from the hollow swing shaft 31. The other side of the flexible flow guide 38 is fixed and sealed to the heat sink 11 through soft rubber wall 1 36.

[0038] Triangular prism-shaped guide blocks 37 are fixedly provided at both ends of the flexible guide body 38. The thickness of the flexible guide body 38 is smaller than the internal thickness of the heat sink 11, and the width of the flexible guide body 38 is smaller than the width of the heat sink 11. The cooling oil flows through the gap between the inner wall of the heat sink 11 and the outer wall of the flexible guide body 38.

[0039] The air passage between the flexible body guide 38 and the hollow swing shaft 31 forms a ventilation chamber 39 . The air flows through the gap between two adjacent heat sinks 11 and the ventilation chamber 39 , and is in contact with the air on four sides.

[0040] The hollow swing shaft 31 includes a force-bearing arm 1 32 and a force-bearing arm 2 33 , both of which are fixedly connected to the end of the hollow swing shaft 31 close to the driving mechanism 2 , and the force-bearing arm 1 32 and the force-bearing arm 2 33 form a V-shaped structure.

[0041] like Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, a semicircular pressed groove 1 34 is provided on the load-bearing arm 1 32 , and a wavy pressed groove 2 35 is provided on the load-bearing arm 2 33 .

[0042] The drive motor 21 includes a drive motor 21, and a drive rod 22 that passes through the oil outlet pipe 12 is fixedly provided at the rotating shaft end of the drive motor 21. A limiting groove 24 is provided on the drive rod 22 at a position corresponding to the oil outlet end of the heat sink 11, and a limiting bearing 23 is rotatably provided on the drive rod 22.

[0043] There are several limiting grooves 24, which correspond to the heat sinks 11 one by one. A pressure arm block 25 is fixedly provided on the upper wall of the limiting groove 24. The pressure arm block 25 first rotates to the lower end of the pressed groove 1 34, and as it rotates to the edge of the pressed groove 1 34, it pushes the force-bearing arm 1 32 to swing downward, driving the hollow swing shaft 31 to rotate. The pressure arm block 25 then rotates away from the force-bearing arm 1 32, reaches the lowest end of the pressed groove 2 35, and gradually presses down the force-bearing arm 2 33.

[0044] A plurality of elastic water columns 43 are provided in the ventilation chamber 39, and the plurality of water columns 43 are respectively arranged in two rows, and are located at both ends of the ventilation chamber 39 to support the flexible flow guide 38. At the same time, the plurality of water columns 43 are interconnected and connected to a water pump 41 through a hose. The control end of the water pump 41 is connected to a temperature sensor 42, and the temperature sensor 42 is installed inside one of the plurality of heat sinks 11. The temperature of the cooling oil in the heat sink 11 is detected by the temperature sensor 42 to control the water pump 41 and the drive motor 21. The higher the temperature of the heat sink 11, the water pump 41 draws out the water in the water column 43, making the flexible flow guide 38 narrower, thereby increasing the flow rate and flow rate of the cooling oil inside the heat sink 11. When the water column 43 opens the ventilation chamber 39, air can pass through, thereby increasing the air heat dissipation efficiency.

[0045] Before the radiator starts working, the cooling oil inside the heat sink 11 is in a static state, the flexible guide body 38 maintains a certain shape under the support of the water column 43, the hollow swing shaft 31 is in a static position, the drive mechanism 2 has not yet started, and the temperature sensor 42 monitors the temperature of the cooling oil in the heat sink 11 in real time but does not trigger any action;

[0046] When the transformer starts operating and generates heat that needs to be dissipated, cooling oil enters the heat sink 11 through the oil inlet pipe 13, flows inside the heat sink 11, and finally flows out through the oil outlet pipe 12. The cooling oil flow path is the oil path inside the heat sink 11, and its flow direction is from the oil inlet pipe 13 to the oil outlet pipe 12.

[0047] The temperature sensor 42 monitors the temperature of the cooling oil in the heat sink 11 in real time. When the temperature reaches a preset value, the temperature sensor 42 sends a signal to start the drive motor 21 and the water pump 41;

[0048] After the driving motor 21 is started, the driving rod 22 at the end of its rotating shaft begins to rotate. The limiting groove 24 on the driving rod 22 cooperates with the pressed groove 1 34 and pressed groove 2 35 on the force-bearing arm 1 32 and force-bearing arm 2 33 of the hollow swing shaft 31 to realize the reciprocating swing of the hollow swing shaft 31. When the driving rod 22 rotates, the pressure arm block 25 in the limiting groove 24 first rotates to the lower end of the pressed groove 1 34. As the driving rod 22 continues to rotate, the pressure arm block 25 reaches the edge of the pressed groove 1 34, pushing the force-bearing arm 1 32 downward. The downward swing of the force-bearing arm 1 32 drives the hollow swing shaft 31 to rotate. When the pressure arm block 25 rotates away from the force-bearing arm 1 32, it reaches the lowest end of the pressed groove 2 35 and gradually presses down the force-bearing arm 2 33. After the force-bearing arm 2 33 is pressed down, the hollow swing shaft 31 continues to swing. Through the above process, the hollow swing shaft 31 realizes the reciprocating swing of the preset angle.

[0049] The reciprocating swing of the hollow swing shaft 31 drives the flexible guide body 38 to produce a wavy deformation. The deformation of the flexible guide body 38 alternately forms positive and reverse longitudinal eddy flow fields in the oil path inside the heat sink 11, destroying the boundary layer thermal resistance of the cooling oil and enhancing the heat dissipation effect. The flexible guide body 38 is fixed and sealed to the hollow swing shaft 31 through the soft rubber wall 2 301, and is fixed and sealed to the heat sink 11 through the soft rubber wall 1 36. Therefore, the swing of the hollow swing shaft 31 can be effectively transmitted to the flexible guide body 38. Triangular prism-shaped guide blocks 37 are fixed at both ends of the flexible guide body 38. The guide blocks 37 play a role in guiding the flow of cooling oil during the deformation process, further enhancing the disturbance effect of the oil flow. The cooling oil flows through the gap between the inner wall of the heat sink 11 and the outer wall of the flexible guide body 38. The wavy deformation of the flexible guide body 38 causes the flow path of the cooling oil to change continuously, thereby destroying the boundary layer thermal resistance and improving the heat dissipation efficiency.

[0050] A through-type air passage, or plenum chamber 39, is formed between the interior of the hollow swing shaft 31 and the flexible body guide 38. Air flows through the gaps between adjacent heat sinks 11 and the plenum chamber 39, exposing air on all four sides. This improves heat dissipation efficiency. Air enters the plenum chamber 39 through the gaps between the heat sinks 11. A water column 43 in the plenum chamber 39 is regulated by a water pump 41. When the temperature of the heat sink 11 rises, the water pump 41 pumps water out of the column 43, narrowing the flexible body guide 38 and expanding the plenum chamber 39, increasing the air flow area. This increased air flow area allows air to flow more smoothly through the plenum chamber 39, removing more heat and further enhancing the heat dissipation effect.

[0051] The temperature sensor 42 continuously monitors the temperature of the cooling oil in the heat sink 11 and dynamically adjusts the working state of the water pump 41 and the drive motor 21 according to the temperature change.

[0052] When the temperature of the heat sink 11 rises, the temperature sensor 42 detects the temperature change and sends a signal to the water pump 41 to speed up the pumping speed, pumping out more water in the water column 43, making the flexible body guide 38 further narrower, increasing the flow and flow rate of the cooling oil, and at the same time expanding the air chamber 39 to increase the air heat dissipation efficiency. When the temperature of the heat sink 11 drops, the temperature sensor 42 detects the temperature change and sends a signal to the water pump 41 to slow down the pumping speed or stop pumping, the water in the water column 43 flows back, the flexible body guide 38 returns to its original width, the flow and flow rate of the cooling oil decrease accordingly, the air circulation area of ​​the air chamber 39 also decreases accordingly, and the heat dissipation efficiency decreases. Through the above dynamic adjustment process, the radiator can maintain the best heat dissipation effect under different temperature conditions and achieve dynamic temperature balance.

[0053] Cooling oil enters the heat sink 11 through the oil inlet pipe 13. The flexible guide body 38 distorts the oil flow, forcing it to change direction and forming eddies. These eddies increase the contact area and frequency between the oil flow and the inner wall of the heat sink 11, improving heat exchange efficiency. By destroying the boundary layer thermal resistance, they significantly enhance the cooling effect of the cooling oil and avoid the reduction in heat dissipation efficiency caused by oil stagnation. Furthermore, the eddy current field generated by the wave-like deformation evenly distributes heat, further enhancing heat dissipation performance.

[0054] As the cooling oil flows through the heat sink 11, air flows through the gaps between the fins 11 and the ventilation chamber 39. The design of the ventilation chamber 39 allows air to contact the cooling oil from all sides, increasing the heat dissipation area. The air flow further enhances the heat dissipation effect. Especially when the cooling oil temperature is high, air convection can quickly remove heat, improving heat dissipation efficiency. At the same time, this design fully utilizes the natural convection characteristics of air, eliminating the need for additional power devices and reducing energy consumption.

[0055] The flow path of the cooling oil inside the heat sink 11 is divided into two channels by the flexible body guide 38, which increases the path length and contact area of ​​the oil flow. At the same time, the wavy deformation of the flexible body guide 38 further disturbs the oil flow, promoting heat transfer. By optimizing the flow path of the cooling oil, the heat dissipation efficiency is improved. At the same time, the design of the flexible body guide 38 allows the flow rate and flow rate of the cooling oil to be adjusted as needed, further improving the heat dissipation performance.

[0056] A temperature sensor 42 is installed inside the heat sink 11 to monitor the temperature of the cooling oil in real time. The signal output end of the temperature sensor 42 is connected to the control end of the water pump 41 and the drive motor 21. When the temperature sensor 42 detects that the temperature of the cooling oil has risen, the water pump 41 starts to pump out the water in the water column 43. The contraction of the water column 43 causes the flexible body guide 38 to narrow, the cooling oil channel inside the heat sink 11 to widen, and the oil flow speed to increase. At the same time, the water column 43 opens the air chamber 39, allowing the air to flow more smoothly, further improving the heat dissipation efficiency. Through temperature sensing and intelligent adjustment, the radiator can automatically adjust the heat dissipation performance according to the actual working conditions, ensuring the stable operation of the transformer under different load conditions. This intelligent adjustment method not only improves the heat dissipation efficiency, but also reduces energy consumption;

[0057] After the drive motor 21 is started, the drive rod 22 rotates. The pressure arm block 25 first rotates to the lower end of the pressed groove 1 34, pushing the force-bearing arm 1 32 downward, driving the hollow swing shaft 31 to rotate. Subsequently, the pressure arm block 25 leaves the force-bearing arm 1 32 and reaches the lowest end of the pressed groove 2 35, gradually pressing down the force-bearing arm 2 33, causing the hollow swing shaft 31 to swing in the opposite direction. Through the reciprocating swing of the drive mechanism 2, the flexible flow guide 38 can continuously produce a wave-like deformation, forming a stable eddy current field. This reciprocating swing method not only improves the heat dissipation efficiency, but also ensures the long-term stable operation of the radiator.

[0058] The above describes the embodiments of this embodiment, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A sheet-type heat sink for a transformer, characterized in that: include: A plurality of mutually parallel heat sinks (11), wherein a flow changing mechanism (3) is provided inside the heat sink (11) for forcibly changing the oil flow in the heat sink (11), destroying the boundary layer thermal resistance, and enhancing the heat dissipation effect; The flow-changing mechanism (3) comprises a hollow swing shaft (31) that transversely passes through the center line of the heat sink (11), flexible flow guides (38) distributed on both sides of the hollow swing shaft (31), and a driving mechanism (2); The flexible guide bodies (38) on both sides are sealedly connected to the hollow swing shaft (31) and the heat sink (11) through soft rubber walls, and a through-type air channel is formed between the flexible guide body (38) and the interior of the hollow swing shaft (31) for air circulation; The driving mechanism (2) is arranged at the end of the hollow swing shaft (31), and drives the hollow swing shaft (31) by reciprocatingly swinging at a preset angle, causing the flexible guide body (38) to produce a wave-shaped deformation, thereby alternately forming positive and negative longitudinal eddy flow fields in the oil path inside the heat sink (11), thereby destroying the thermal resistance of the oil flow boundary layer.

2. The fin-type heat sink for transformer according to claim 1, characterized in that: An oil outlet pipe (12) and an oil inlet pipe (13) are fixedly provided at both ends of the heat sink (11), and the oil inlet pipe (13) is communicated with the oil outlet pipe (12) through the heat sink (11). Cooling oil enters the heat sink (11) through the oil inlet pipe (13) and then flows into the oil outlet pipe (12) from the end of the heat sink (11) away from the oil inlet pipe (13).

3. The fin-type heat sink for transformer according to claim 1, characterized in that: The soft rubber wall comprises a first soft rubber wall (36) and a second soft rubber wall (301), wherein the second soft rubber wall (301) is located on a side close to the hollow swing shaft (31), and the flexible flow guide (38) is fixed and sealed to the hollow swing shaft (31) through the second soft rubber wall (301), and the first soft rubber wall (36) is located on a side away from the hollow swing shaft (31), and the other side of the flexible flow guide (38) is fixed and sealed to the heat sink (11) through the first soft rubber wall (36).

4. The fin-type heat sink for transformer according to claim 3, characterized in that: Triangular prism-shaped flow guide blocks (37) are fixedly provided at both ends of the flexible flow guide (38); the thickness of the flexible flow guide (38) is smaller than the inner thickness of the heat sink (11); the width of the flexible flow guide (38) is smaller than the width of the heat sink (11); and cooling oil flows through the gap between the inner wall of the heat sink (11) and the outer wall of the flexible flow guide (38).

5. The fin-type heat sink for transformer according to claim 1, characterized in that: The air passage inside the flexible body guide (38) and the hollow swing shaft (31) forms a ventilation chamber (39). Air flows through the gap between two adjacent heat sinks (11) and the ventilation chamber (39), and the entire body is in contact with air on four sides.

6. The fin-type heat sink for transformer according to claim 2, characterized in that: The hollow swing shaft (31) includes a first force-bearing arm (32) and a second force-bearing arm (33), and the first force-bearing arm (32) and the second force-bearing arm (33) are both fixedly connected to the end of the hollow swing shaft (31) close to the driving mechanism (2), and the first force-bearing arm (32) and the second force-bearing arm (33) form a V-shaped structure.

7. The fin-type heat sink for transformer according to claim 6, characterized in that: The first force-bearing arm (32) is provided with a semicircular pressed groove (34), and the second force-bearing arm (33) is provided with a wave-shaped pressed groove (35).

8. The fin-type heat sink for transformer according to claim 7, characterized in that: The driving motor (21) comprises a driving motor (21), a driving rod (22) which penetrates the oil outlet pipe (12) and is fixedly provided at the rotating shaft end of the driving motor (21), a limiting groove (24) is provided on the driving rod (22) at a position corresponding to the oil outlet end of the heat sink (11), and a limiting bearing (23) is rotatably provided on the driving rod (22).

9. The fin-type heat sink for transformer according to claim 8, characterized in that: The limiting grooves (24) are provided with a plurality of them, which correspond to the heat sinks (11) one by one. The upper wall of the limiting groove (24) is fixedly provided with a pressure arm block (25). The pressure arm block (25) first rotates to the lower end of the pressed groove (34), and as it rotates to the edge of the pressed groove (34), it pushes the force-bearing arm (32) to swing downward, driving the hollow swing shaft (31) to rotate. The pressure arm block (25) then rotates away from the force-bearing arm (32) and reaches the lowest end of the pressed groove (35), gradually pressing down the force-bearing arm (33).

10. The fin-type heat sink for transformer according to claim 5, characterized in that: A plurality of elastic water columns (43) are provided in the ventilation chamber (39), and the plurality of water columns (43) are arranged in two rows and located at both ends of the ventilation chamber (39) to support the flexible guide body (38). At the same time, the plurality of water columns (43) are interconnected and connected to a water pump (41) through a hose. A control end of the water pump (41) is connected to a temperature sensor (42), and the temperature sensor (42) is installed inside one of the plurality of heat sinks (11).

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