Noise reduction type finned radiator for transformer

Abstract

The invention relates to the technical field of transformers, and discloses a noise reduction type finned radiator for a transformer, which comprises a transformer body, and the transformer body comprises a transformer box, an oil outlet pipe, an oil inlet pipe and a radiator; a variable section unit is arranged on the oil outlet pipe and used for making memory metal contract or stretch to drive a movable shaft to move when the environment temperature or the oil temperature changes according to the characteristic that the memory metal is sensitive to the temperature, and a section adjusting block moves in an adjusting cavity through a first connecting rod and an adjusting column. And the section of an internal flow channel of the oil outlet pipe is adjusted. Through the variable section unit, the internal flow channel section of the oil outlet pipe can be automatically adjusted according to the environment temperature by means of the characteristic that memory metal is sensitive to the temperature. And in a low-temperature environment, the memory metal shrinks to drive related parts to move the section adjusting block and reduce the section of the flow channel, so that the flow velocity of the transformer oil is accelerated, and the problem of excessive heat dissipation or insufficient heat dissipation is avoided.

Description

Technical Field

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

[0002] Transformers are crucial equipment in power systems, and their stable operation plays a key role in ensuring the reliability and quality of power supply. During operation, transformer windings and cores generate significant heat due to current flow and electromagnetic induction. If this heat cannot be dissipated promptly and effectively, the transformer's temperature will continue to rise, affecting its performance and service life, and in severe cases, even causing safety accidents.

[0003] Currently, transformers typically use plate-type heat sinks for heat dissipation. The basic principle is to utilize the thermal conductivity of transformer oil to transfer heat generated by the transformer to the transformer oil. After being heated, the transformer oil's density decreases and it flows upward through the oil outlet pipe into the radiator. There, it exchanges heat with the low-temperature wall surface, dissipating the heat to the surrounding environment. The cooled oil then returns to the transformer tank through the oil inlet pipe.

[0004] However, existing transformer plate cooling systems have some shortcomings. Transformer cooling requirements vary significantly under different operating conditions and environmental conditions. For example, in high-temperature environments or when the transformer is operating under high load, higher cooling efficiency is required to ensure normal operation of the transformer. However, in low-temperature environments or under low load conditions, excessive cooling efficiency can cause the transformer oil temperature to drop too low, affecting transformer oil performance and normal operation. The system cannot be flexibly adjusted to meet actual cooling requirements, resulting in cooling efficiency that cannot match actual operating conditions, leading to energy waste or insufficient cooling. Summary of the Invention

[0005] The present invention provides a noise-reducing plate-type heat sink for a transformer, which solves the technical problem in the related art that in a low-temperature environment or under low-load conditions, excessively high heat dissipation efficiency may cause the transformer oil temperature to be too low, affecting the performance of the transformer oil and the normal operation of the transformer, and cannot be flexibly adjusted according to actual heat dissipation requirements, resulting in the heat dissipation efficiency not matching the actual working conditions, thereby causing energy waste or insufficient heat dissipation.

[0006] The present invention provides a fin-type radiator for a transformer, comprising a transformer body, wherein the transformer body comprises a transformer box, an oil outlet pipe, an oil inlet pipe and a radiator, wherein the oil outlet pipe and the oil inlet pipe are mounted on the transformer box, and the radiator is arranged between the oil outlet pipe and the oil inlet pipe; a variable cross-section unit is provided on the oil outlet pipe, and the variable cross-section unit comprises an adjustment cavity opened inside the oil outlet pipe, a cross-section adjustment block located in the adjustment cavity, an adjustment column connected to the cross-section adjustment block, a support seat mounted on the oil outlet pipe, a first connecting rod rotatably connected to the support seat through a rotating shaft, and a first connecting rod provided at the first connecting rod. The rod comprises a movable shaft at one end away from the adjusting column, a sleeve slidably connected to the outside of the movable shaft and installed on the oil outlet pipe through a fixed seat, and a memory metal installed between the movable shaft and the sleeve; the variable cross-section unit is used to utilize the temperature-sensitive property of the memory metal, so that the memory metal contracts or stretches when the ambient temperature changes, driving the movable shaft to move, and the cross-section adjustment block moves in the adjustment cavity through the first connecting rod and the adjusting column, thereby adjusting the internal flow channel cross-section of the oil outlet pipe to increase the flow rate of the transformer oil inside the radiator, thereby realizing automatic adjustment of the heat dissipation parameters according to different working conditions and ambient temperatures.

[0007] As a further optimization scheme of the present invention, when the flow channel cross-section decreases, under the condition of constant flow rate, the flow rate of the transformer oil increases, thereby enhancing the heat dissipation efficiency; when the temperature rises, the memory metal returns to its original state, pushing the movable shaft to move in the opposite direction, and the cross-section adjustment block is reset through the same transmission path, so that the flow channel cross-section returns to normal, thereby ensuring normal oil flow.

[0008] As a further optimization solution of the present invention, a plurality of groups of holes are provided on the sleeve, and the holes are used to allow air inside and outside the sleeve to circulate freely, thereby accelerating heat transfer.

[0009] As a further optimization scheme of the present invention, both ends of the first connecting rod are provided with a sliding groove, and the inside of the sliding groove is slidably connected with a sliding rod, one group of the sliding rods is installed on the adjusting column, and the other group of the sliding rods is installed on the movable shaft. The cooperation of the sliding groove and the sliding rod is used to accurately transmit motion, so that the rotation of the first connecting rod can drive the adjusting column to slide.

[0010] As a further optimization scheme of the present invention, a spring is provided on the outside of the adjusting column, one end of the spring is installed on the adjusting cavity, and the other end of the spring is installed on the cross-section adjusting block. The spring is used to assist the cross-section adjusting block to quickly reset when the memory metal returns to its original state, and to restore the normal flow channel cross-section in time to ensure the continuous and stable operation of the system.

[0011] As a further optimization scheme of the present invention, limiting grooves are symmetrically opened on the cross-section adjustment block, and the internal sliding connection of the limiting grooves is connected to the limiting block. The limiting block is installed on the adjustment cavity. The limiting grooves and the limiting block are used together to limit the moving range of the cross-section adjustment block to ensure that it moves within the set trajectory.

[0012] As a further optimization scheme of the present invention, a plurality of connecting ports are opened on the oil outlet pipe, a connecting pipe is installed on the radiator, the connecting port and the connecting pipe are rotatably connected through a bearing, and an angle adjustment unit is provided on the connecting pipe, and the angle adjustment unit is used to adjust the angle of the radiator to adapt to the heat dissipation requirements under different operating conditions and environmental conditions.

[0013] As a further optimization solution of the present invention, the angle adjustment unit includes a second connecting rod, and the second connecting rod is rotatably connected to a plurality of cams via a rotating shaft, and the cams are installed on the connecting tube.

[0014] As a further optimization scheme of the present invention, the angle adjustment unit also includes a bracket installed on the oil outlet pipe, and the bearing on the bracket is connected to a connecting shaft, and two sets of winding wheels are installed on the connecting shaft. The angle adjustment unit is respectively connected to a first pull rope and a second pull rope through the two sets of winding wheels, and the end of the first pull rope away from the winding wheel is fixedly connected to the second connecting rod, and the end of the second pull rope away from the winding wheel is fixedly connected to the first connecting rod.

[0015] As a further optimization scheme of the present invention, in a low-temperature environment, when the memory metal contracts, the movable shaft slides in the sleeve, pulling the second pull rope wrapped around one of the sets of winding wheels, so that one set of winding wheels drives the connecting shaft to rotate; when the connecting shaft rotates, the other set of winding wheels rotates accordingly, pulling the first pull rope wrapped around it, and the pulling of the first pull rope drives the second connecting rod to move, driving the cam to rotate, and the rotation of the cam drives the connecting pipe to rotate, thereby realizing the adjustment of the radiator angle.

[0016] The beneficial effects of the present invention are as follows: the present invention can automatically adjust the internal flow channel cross-section of the oil outlet pipe according to the ambient temperature by using the temperature-sensitive property of the memory metal through the variable cross-section unit. In a low-temperature environment, the memory metal contracts, driving the relevant components to move the cross-section adjustment block, reducing the flow channel cross-section, thereby accelerating the flow rate of the transformer oil. The high-speed flowing transformer oil can enhance the convective heat transfer effect between the transformer and the radiator wall, more efficiently transfer the heat generated by the transformer to the radiator wall and dissipate it, ensuring that the transformer can maintain a suitable operating temperature even in a low-temperature environment. When operating in a high-temperature environment, the memory metal stretches, and the flow channel cross-section returns to normal or increases, ensuring normal oil flow and heat dissipation effect, avoiding the problem of excessive heat dissipation or insufficient heat dissipation, and achieving a balance between energy saving and efficient heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the oil outlet pipe, oil inlet pipe and radiator of the present invention;

[0019] Figure 3 It is a schematic diagram of the partial three-dimensional structure of the oil outlet pipe, oil inlet pipe and radiator of the present invention;

[0020] Figure 4 The present invention Figure 3 A magnified view of the structure at center A;

[0021] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the oil outlet pipe and the variable cross-section unit of the present invention;

[0022] Figure 6 It is a schematic diagram of the local three-dimensional structure of the variable cross-section unit of the present invention;

[0023] Figure 7 It is a schematic diagram of the partial three-dimensional structure of the variable cross-section unit and the angle adjustment unit of the present invention;

[0024] Figure 8 It is a partial three-dimensional structural diagram of the second connecting rod, cam and first pull rope of the present invention;

[0025] Figure 9 It is a schematic diagram of the top view of the oil outlet pipe, radiator and variable cross-section unit of the present invention.

[0026] In the figure: 100, transformer body; 110, transformer box; 120, oil outlet pipe; 121, connecting port; 130, oil inlet pipe; 140, radiator; 141, connecting pipe; 200, variable cross-section unit; 201, cross-section adjustment block; 202, adjustment column; 203, support seat; 204, first connecting rod; 205, movable shaft; 206, sleeve; 207, fixing seat; 208, memory metal; 209, hole; 210, slide groove; 211, slide rod; 212, spring; 213, limit groove; 214, limit block; 300, angle adjustment unit; 301, second connecting rod; 302, cam; 303, bracket; 304, connecting shaft; 305, winding wheel; 306, first pull rope; 307, second pull rope. DETAILED DESCRIPTION

[0027] 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.

[0028] according to Figure 1 and Figure 2 As shown, a sheet-type heat sink 140 for a transformer includes a transformer body 100, which includes a transformer case 110, an oil outlet pipe 120, an oil inlet pipe 130, and a heat sink 140. The oil outlet pipe 120 and the oil inlet pipe 130 are mounted on the transformer case 110, and the heat sink 140 is disposed between the oil outlet pipe 120 and the oil inlet pipe 130. When the transformer body 100 is in operation, the windings and the core generate heat. This heat is first transferred to the transformer oil through heat conduction. Transformer oil has a certain thermal conductivity, and heat is transferred from the higher-temperature winding and core surfaces to the transformer oil in contact with them.

[0029] After being heated, the transformer oil's density decreases, causing it to flow upward, entering the upper portion of transformer tank 110. The heated transformer oil is then transported to radiator 140 via oil outlet pipe 120, while the hydraulic oil, after heat dissipation treatment, is then transported to transformer tank 110 via oil inlet pipe 130. Inside radiator 140, the heated transformer oil contacts the cooler walls of radiator 140, transferring heat to them. Simultaneously, as the oil flows within radiator 140, it continuously exchanges heat with the walls due to density differences and external driving forces. This external driving force can be the action of an oil pump.

[0030] In one embodiment, according to Figures 2 to 6 As shown, the oil outlet pipe 120 is provided with a variable cross-section unit 200. This unit is used to adjust the cross-section of the internal flow channel of the oil outlet pipe 120, thereby increasing the flow rate of the transformer oil within the radiator 140. The variable cross-section unit 200 is capable of adjusting the cross-section of the internal flow channel of the oil outlet pipe 120. When the cross-section decreases, the flow rate increases at a constant flow rate. The increased transformer oil flow rate enhances the convective heat transfer between the oil and the walls of the radiator 140, thereby more effectively transferring heat generated by the transformer to the walls of the radiator 140 and dissipating it into the surrounding environment, ensuring that the transformer maintains a suitable operating temperature under various operating conditions.

[0031] Furthermore, the variable cross-section unit 200 can adjust the internal flow channel cross-section of the oil outlet pipe 120 according to different operating conditions and ambient temperature, thereby changing the flow rate of the transformer oil. Under normal circumstances, if the oil flow rate is unstable, turbulence will form within the pipe, and the turbulent flow will impact the pipe wall and generate noise. By rationally adjusting the oil flow rate through the variable cross-section unit 200, the oil flow is more stable, which can reduce the generation of turbulence and, in turn, reduce the noise caused by turbulent oil flow.

[0032] For example, when running under high load, the variable cross-section unit 200 reduces the flow channel cross-section, increases the oil flow speed, ensures the heat dissipation effect while making the oil flow at a relatively stable high speed; when running under low load, the normal flow channel cross-section is restored to avoid turbulence caused by excessively slow oil flow speed and reduce noise generation.

[0033] Specifically, the variable cross-section unit 200 includes an adjustment chamber opened inside the oil outlet pipe 120, and a cross-section adjustment block 201 is provided in the adjustment chamber, an adjustment column 202 is installed on the cross-section adjustment block 201, and the adjustment column 202 is slidably connected to the inside of the oil outlet pipe 120, a support seat 203 is installed on the oil outlet pipe 120, and the support seat 203 is rotatably connected to the first connecting rod 204 through a rotating shaft, a movable shaft 205 is provided at the end of the first connecting rod 204 away from the adjustment column 202, and a sleeve 206 is slidably connected to the outside of the movable shaft 205, a fixed seat 207 is installed on the sleeve 206, and the fixed seat 207 is installed on the oil outlet pipe 120, a memory metal 208 is installed between the movable shaft 205 and the sleeve 206, the memory metal 208 can be a nickel-titanium alloy, and the memory metal 208 is used as a trigger element, and its temperature-sensitive characteristics are utilized. When the ambient temperature changes, the memory metal 208 contracts or stretches accordingly, without the need for an additional complex control system, to achieve automatic adjustment.

[0034] Among them, according to Figure 5 and Figure 6 As shown, the sleeve 206 is provided with a plurality of holes 209. The holes 209 allow air to circulate freely inside and outside the sleeve 206, accelerating heat transfer. When the ambient temperature changes, the outside air can quickly pass through the holes 209 and contact the memory metal 208, allowing the memory metal 208 to sense the temperature change more quickly.

[0035] For example, in a cold environment, cold air can pass through holes 209 unimpeded, rapidly lowering the temperature of memory metal 208 and causing it to contract. In a hot environment, hot air can also quickly act on memory metal 208, causing it to expand. Furthermore, holes 209 increase the contact area between memory metal 208 and air. According to the principles of heat transfer, a larger contact area means faster heat exchange, further increasing the sensitivity of memory metal 208 to ambient temperature changes.

[0036] In addition, according to Figure 4 As shown, both ends of the first connecting rod 204 are provided with a sliding groove 210, and the interior of the sliding groove 210 is slidably connected with a sliding rod 211, wherein one group of sliding rods 211 is installed on the adjustment column 202, and the other group of sliding rods 211 is installed on the movable shaft 205.

[0037] It should be noted that when the ambient temperature changes, the memory metal 208 between the movable shaft 205 and the sleeve 206 will deform accordingly due to its sensitivity to temperature. In a low temperature environment, the memory metal 208 contracts, pulling the movable shaft 205 to slide in the sleeve 206.

[0038] During operation, the movement of the movable shaft 205 drives the first connecting rod 204 to rotate about the rotating shaft on the support base 203 via the sliding rod 211. The sliding grooves 210 at each end of the first connecting rod 204 cooperate with the sliding rod 211 to accurately transmit its rotation. The rotation of the first connecting rod 204, in turn, drives the adjustment column 202 to slide within the oil outlet pipe 120 via the sliding rod 211. The adjustment column 202 is connected to the cross-section adjustment block 201, driving the cross-section adjustment block 201 to move within the adjustment chamber. As a result, the internal flow channel cross-section of the oil outlet pipe 120 changes with the position of the cross-section adjustment block 201.

[0039] When the flow channel cross-section decreases, under the condition of constant flow rate, the flow rate of transformer oil increases, thereby enhancing the heat dissipation efficiency; when the temperature rises, the memory metal 208 returns to its original state, pushing the movable shaft 205 to move in the opposite direction, and resetting the cross-section adjustment block 201 through the same transmission path, so that the flow channel cross-section returns to normal and ensures normal oil flow.

[0040] In summary, by adjusting the flow channel cross-section to change the oil flow rate, the variable cross-section unit 200 can adapt to the heat dissipation requirements of the transformer under different loads and ambient temperatures. When high loads generate a large amount of heat, the flow channel cross-section is reduced to increase the oil flow rate and accelerate heat dissipation. When low loads or ambient temperatures are suitable, the flow channel cross-section and oil flow rate are maintained at a normal level to avoid excessive heat dissipation and energy waste.

[0041] Further, according to Figure 4 and Figure 5 As shown, a spring 212 is provided on the outside of the adjustment column 202. One end of the spring 212 is mounted on the adjustment cavity, and the other end of the spring 212 is mounted on the cross-section adjustment block 201. The spring 212 on the outside of the adjustment column 202 functions when the memory metal 208 returns to its original shape, assisting the cross-section adjustment block 201 in quickly resetting and promptly restoring the normal flow channel cross-section, ensuring continuous and stable operation of the system.

[0042] Furthermore, according to Figure 6As shown, cross-section adjustment block 201 is symmetrically provided with limiting slots 213, which are slidably connected to limiting blocks 214 within the adjustment cavity. Limiting blocks 214 are mounted on the adjustment cavity. The symmetrical limiting slots 213 on cross-section adjustment block 201 cooperate with limiting blocks 214 within the adjustment cavity to limit the range of movement of cross-section adjustment block 201, ensuring that it moves within the set trajectory and ensuring stable and reliable flow channel cross-section adjustment.

[0043] In yet another embodiment, according to Figure 7 As shown, the oil outlet pipe 120 is provided with a plurality of connection ports 121. The connecting pipe 141 is mounted on the radiator 140. The connection ports 121 and the connecting pipe 141 are rotatably connected via a bearing. The connecting pipe 141 is provided with an angle adjustment unit 300, which is used to adjust the angle of the radiator 140. The angle adjustment unit 300 allows the angle of the radiator 140 to be adjusted. The heat dissipation requirements of the transformer vary under different operating conditions and environmental conditions.

[0044] For example, in high-temperature environments or when the transformer is operating under high load, the radiator 140 can be adjusted to an angle that is more conducive to air flow and heat exchange. This increases the contact area between the radiator 140 and the air, improves the convective heat transfer efficiency, and thus more effectively dissipates the heat generated by the transformer, ensuring stable operation of the transformer. In low-temperature or low-load environments, the angle can be appropriately adjusted to reduce unnecessary heat dissipation and maintain the appropriate temperature of the transformer.

[0045] Additionally, the angle adjustment unit 300 can adjust the angle of the heat sink 140. When the angle of the heat sink 140 is adjusted to a position that is more conducive to air flow, air can pass through the heat sink 140 more smoothly, reducing eddies and turbulence around the heat sink 140. Air eddies and turbulence can generate aerodynamic noise, and optimizing air flow can reduce this noise.

[0046] For example, in a high temperature environment or during high load operation, the heat sink 140 is adjusted to a suitable angle so that air passes through the heat sink 140 in a laminar flow state, thereby reducing air flow noise.

[0047] Specifically, according to Figures 7 to 9As shown, the angle adjustment unit 300 includes a second connecting rod 301, and a plurality of cams 302 are rotatably connected to the second connecting rod 301 through a rotating shaft, and the cams 302 are installed on the connecting pipe 141. The angle adjustment unit 300 also includes a bracket 303 installed on the oil outlet pipe 120, and a connecting shaft 304 is connected to the bearing on the bracket 303, and two groups of winding wheels 305 are installed on the connecting shaft 304, one group of winding wheels 305 is wound with a first pull rope 306, and the end of the first pull rope 306 away from the winding wheel 305 is fixedly connected to the second connecting rod 301, and the other group of winding wheels 305 is wound with a second pull rope 307, and the end of the second pull rope 307 away from the winding wheel 305 is fixedly connected to the first connecting rod 204.

[0048] It is important to understand that according to Figures 7 to 9 As shown, when the ambient temperature changes, the memory metal 208 in the variable cross-section unit 200 will deform accordingly. In a low-temperature environment, the memory metal 208 contracts, pulling the movable shaft 205 to slide within the sleeve 206. The movement of the movable shaft 205 drives the first connecting rod 204 to rotate about the rotating shaft on the support base 203 through the sliding rod 211.

[0049] When the first connecting rod 204 rotates, it will pull the second pull rope 307 wrapped around one of the winding wheels 305. Since the winding wheels 305 are installed on the connecting shaft 304, the pulling of the second pull rope 307 will cause the connecting shaft 304 to rotate. When the connecting shaft 304 rotates, the other set of winding wheels 305 also rotates, thereby pulling the first pull rope 306 wrapped around it.

[0050] The pulling of the first pull rope 306 will drive the second connecting rod 301 to move, and the movement of the second connecting rod 301 will cause the cam 302 to rotate. Since the connecting pipe 141 is rotatably connected to the connecting port 121 on the oil outlet pipe 120 through a bearing, the rotation of the cam 302 will drive the connecting pipe 141 to rotate, thereby adjusting the angle of the radiator 140.

[0051] In addition, when the temperature rises, the memory metal 208 returns to its original state, pushing the movable shaft 205 to move in the opposite direction, and the first connecting rod 204 rotates in the opposite direction, causing the second connecting rod 301 to move in the opposite direction through the same transmission path, and finally restoring the angle of the radiator 140 to its initial state or adjusting it to an angle suitable for the current temperature.

[0052] In summary, the angle adjustment unit 300 and the variable cross-section unit 200 are linked via the first pull rope 306 and the second pull rope 307. When the first connecting rod 204 in the variable cross-section unit 200 moves, the second pull rope 307 drives the winding wheel 305 to rotate, which in turn pulls the second connecting rod 301 via the first pull rope 306, ultimately adjusting the angle of the radiator 140. This linkage design enables the cooling system to simultaneously adjust the flow channel cross-section of the oil outlet pipe 120 and the angle of the radiator 140 based on environmental changes, further optimizing heat dissipation performance and enhancing the intelligence and adaptability of the entire cooling system.

[0053] The above describes an embodiment of this specific implementation method, but this embodiment is not limited to the above specific implementation method. The above specific implementation method is 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: The transformer body includes a transformer box, an oil outlet pipe, an oil inlet pipe and a radiator; A variable cross-section unit, comprising an adjustment chamber defined within the oil outlet pipe, a cross-section adjustment block located within the adjustment chamber, an adjustment column connected to the cross-section adjustment block, a support seat mounted on the oil outlet pipe, a first connecting rod rotatably connected to the support seat via a rotating shaft, a movable shaft located at an end of the first connecting rod remote from the adjustment column, a sleeve slidably connected to the exterior of the movable shaft and mounted on the oil outlet pipe via a fixed seat, and a memory metal member mounted between the movable shaft and the sleeve; The variable cross-section unit is used to utilize the temperature-sensitive property of memory metal. When the ambient temperature changes, the memory metal contracts or expands, driving the movable shaft to move. The cross-section adjustment block moves within the adjustment cavity through the first connecting rod and the adjustment column, thereby adjusting the internal flow channel cross-section of the oil outlet pipe to increase the flow rate of the transformer oil inside the radiator, thereby realizing automatic adjustment of the heat dissipation parameters according to different working conditions and ambient temperatures.

2. The fin-type heat sink for transformer according to claim 1, characterized in that: When the flow channel cross section decreases, under the condition of constant flow rate, the flow rate of transformer oil increases, thus enhancing the heat dissipation efficiency; when the temperature rises, the memory metal returns to its original shape, pushing the movable shaft to move in the opposite direction, and the cross section adjustment block is reset through the same transmission path, so that the flow channel cross section returns to normal, ensuring normal oil flow; Among them, when running under high load, the variable cross-section unit reduces the flow channel cross-section to ensure the heat dissipation effect while allowing the oil to flow at a relatively stable high speed; when running under low load, the normal flow channel cross-section is restored to avoid turbulence caused by excessively slow oil flow and reduce noise generation.

3. The fin-type heat sink for transformer according to claim 1, characterized in that: The sleeve is provided with a plurality of groups of holes, which are used to allow air inside and outside the sleeve to circulate freely, thereby accelerating heat transfer.

4. The fin-type heat sink for transformer according to claim 1, characterized in that: Both ends of the first connecting rod are provided with a sliding groove, and the inside of the sliding groove is slidably connected to a sliding rod, one group of the sliding rods is installed on the adjusting column, and the other group of the sliding rods is installed on the movable shaft. The cooperation of the sliding groove and the sliding rod is used to accurately transmit motion, so that the rotation of the first connecting rod can drive the adjusting column to slide.

5. The fin-type heat sink for transformer according to claim 1, characterized in that: A spring is provided on the outside of the adjusting column, one end of the spring is installed on the adjusting cavity, and the other end of the spring is installed on the cross-section adjusting block. The spring is used to assist the cross-section adjusting block to quickly reset when the memory metal returns to its original state, and to restore the normal flow channel cross-section in time to ensure continuous and stable operation of the system.

6. The fin-type heat sink for transformer according to claim 1, characterized in that: The cross-section adjustment block is symmetrically provided with limiting grooves, and the internal sliding connection of the limiting grooves is connected to the limiting block, and the limiting block is installed on the adjustment cavity. The limiting grooves and the limiting block cooperate to limit the moving range of the cross-section adjustment block to ensure that it moves within the set trajectory.

7. The fin-type heat sink for transformer according to claim 1, characterized in that: The oil outlet pipe is provided with a plurality of connection ports, a connection pipe is installed on the radiator, the connection port and the connection pipe are rotatably connected via a bearing, and an angle adjustment unit is provided on the connection pipe, and the angle adjustment unit is used to adjust the angle of the radiator to adapt to the heat dissipation requirements under different operating conditions and environmental conditions.

8. The fin-type heat sink for transformer according to claim 7, characterized in that: The angle adjustment unit includes a second connecting rod, and the second connecting rod is rotatably connected to a plurality of cams via a rotating shaft, and the cams are installed on the connecting pipe.

9. The fin-type heat sink for transformer according to claim 8, characterized in that: The angle adjustment unit also includes a bracket installed on the oil outlet pipe, and the bearing on the bracket is connected to a connecting shaft, and two sets of winding wheels are installed on the connecting shaft. The angle adjustment unit is respectively connected to a first pull rope and a second pull rope through the two sets of winding wheels. The end of the first pull rope away from the winding wheel is fixedly connected to the second connecting rod, and the end of the second pull rope away from the winding wheel is fixedly connected to the first connecting rod.

10. The fin-type heat sink for transformer according to claim 9, characterized in that: In a low-temperature environment, when the memory metal contracts, the movable shaft slides in the sleeve, pulling the second pull rope wrapped around one set of winding wheels, causing one set of winding wheels to drive the connecting shaft to rotate; When the connecting shaft rotates, the other set of winding wheels rotates accordingly, pulling the first pull rope wrapped around it. The pulling of the first pull rope drives the second connecting rod to move, driving the cam to rotate. The rotation of the cam drives the connecting pipe to rotate, thereby adjusting the radiator angle.

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