A large transformer with active wind-guided cooling

Abstract

This invention discloses a large transformer with active airflow-guided cooling, specifically relating to the field of air compressor technology. The invention utilizes a cooling adjustment component. With each rotation of the rotating ring, the outer connecting hole aligns and connects with the air inlet, forming a cooling airflow path. The remaining connecting holes are sealed by a fixed sleeve. The cooling airflow passes through the annular cavity of the rotating ring, then sequentially through the connected exhaust channel and flow groove until it enters the flow cavity of the arc-shaped plate, guiding the cooling airflow smoothly. The cooling airflow is evenly distributed within the flow cavity and ejected through several air-blowing holes on the arc-shaped plate. As the arc-shaped plate rotates with the gear components, it blows the cool air around and onto the circumferential surface of the corresponding oil outlet pipe, achieving highly efficient localized air cooling. This increases the contact area between the cooling airflow and the surface of the oil outlet pipe, avoiding cooling blind spots and localized heat accumulation that prevents timely heat dissipation. This significantly improves the response efficiency of dynamic heat dissipation control, accelerates heat conduction and diffusion, and shortens cooling time.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a large transformer with active wind-guided cooling. Background Technology

[0002] Large transformers generate significant heat during long-term operation due to load variations, iron losses, and copper losses. If this heat is not dissipated promptly and effectively, it can easily lead to insulation aging, excessively high oil temperatures, reduced efficiency, and even thermal breakdown. Therefore, an efficient cooling system is crucial for ensuring the operational reliability of large transformers.

[0003] A search revealed that the invention patent with publication number CN111326321A discloses an automatic control cooling device for large transformers with good cooling effect. It detects the temperature of transformer oil through a temperature sensor and automatically controls the operation of the circulating pump, fan and motor through a controller, thereby realizing automatic control of transformer cooling.

[0004] In traditional structures, fan cooling often uses fixed air outlets or global air delivery, resulting in low wind energy utilization, difficulty in effectively dissipating local hot spots, and some areas being in airflow dead zones, which easily form heat accumulation zones. The lack of a dynamic airflow guiding structure leads to the inability of heat to be conducted and diffused in a timely manner, reducing the safety of equipment operation. In addition, the cooling air acts evenly or simultaneously on all areas without active airflow direction switching, which can easily cause some areas to be overcooled while critical areas are undercooled, resulting in low wind energy utilization and high system energy consumption. Summary of the Invention

[0005] The purpose of this invention is to provide a large transformer with active wind-guided cooling to solve the problems mentioned in the background art.

[0006] The main technical problem solved by this invention is:

[0007] Fan cooling often uses fixed air outlets, which makes it difficult to effectively dissipate heat from local hot spots. Some areas are in dead air zones, which easily form heat accumulation areas, and there is a lack of dynamic airflow guidance structures.

[0008] Cooling air acts evenly or simultaneously on all areas, lacking active wind direction switching, which can easily cause some areas to be too cold while key areas are not cooled enough, resulting in low wind energy utilization.

[0009] This invention can be achieved through the following technical solutions:

[0010] A large transformer with active wind-guided cooling includes a transformer body, a heat sink installed on the outside of the transformer body, several oil channels for draining transformer oil on the inner edge of the transformer body, a cooling fan embedded on one side surface of the heat sink, and several oil outlet pipes connected to the corresponding oil channels inside the heat sink. Each oil outlet pipe has a cooling adjustment component rotatably installed on its outer side to blow cold air onto the circumferential surface of the oil outlet pipe. Each oil channel and oil outlet pipe has a built-in temperature sensor.

[0011] The cooling adjustment assembly includes a rotary drive unit and an arc plate. The rotary drive unit includes a fixed sleeve mounted on the outer wall of the transformer body. A rotating ring for corresponding oil pipe passage is rotatably installed inside the fixed sleeve. An air inlet is provided on the side of the inner wall of the fixed sleeve facing the cooling fan. An air supply pipe connected to the air inlet is provided on the outer side of the fixed sleeve.

[0012] The rotating ring has several docking holes on its outside and an annular cavity inside that communicates with any one of the docking holes. Any one of the docking holes is used in conjunction with the air inlet hole.

[0013] The rotating ring has an exhaust channel on one side and a gear is fixed on one side of the rotating ring. Two adjacent gears are meshed together, and the surface of the gear is provided with a flow groove that communicates with the exhaust channel.

[0014] The arc-shaped plate has a flow cavity connected to the flow groove at one end near the gear component, and the inner wall of the arc-shaped plate has several air blowing holes. The end of the arc-shaped plate is connected to the gear component.

[0015] A further technical improvement of the present invention is that: a drive gear driven by a servo motor is installed at the lower interior of the heat sink, and the drive gear meshes with a gear component at the bottom.

[0016] A further technical improvement of the present invention is that: one end of the air supply pipe is provided with an opening, and a fixing frame is provided inside the heat dissipation box facing the side of the air supply pipe, and the air supply pipe is embedded in the fixing frame;

[0017] The cooling fan is equipped with an air collection port at its outlet.

[0018] A further technical improvement of the present invention is that: an active air direction switching component is installed inside the fixed frame. The active air direction switching component includes an air guide that rotates around the center of the air inlet. The air guide includes, from top to bottom, a connected fixing part one, a hose and a fixing part two.

[0019] One side of the fixing part is provided with a sealing gasket ring that abuts against the opening, and the other side of the fixing part is provided with a lifting docking unit that mates the sealing gasket ring with any one of the openings.

[0020] A further technical improvement of the present invention is that the active wind direction switching component also includes a rotary motor installed on the middle surface of the fixed frame, the drive end of the rotary motor is connected to the second fixed part, the second fixed part is rotatably connected to the mounting part, and the mounting part is sealed to the air inlet.

[0021] A further technical improvement of the present invention is that: the lifting docking unit includes a support rail plate rotatably mounted on the outside of the air inlet, a linear guide rail is mounted on the support rail plate, a pushing unit is mounted on the slider of the linear guide rail, and the pushing end of the pushing unit is fixed to the fixing part;

[0022] One side of the fixing part two is fixedly connected to the end of the support rail plate via a fixing bracket.

[0023] A further technical improvement of the present invention is that: the ends of several oil outlet pipes are connected to the same cooling coil, the cooling coil is covered with a water-cooling jacket, and an oil return pipe connected to the cooling coil is installed below the heat sink, the end of the oil return pipe extending into the inner cavity of the transformer body.

[0024] A further technical improvement of the present invention is that: an iron core is installed inside the transformer body through an upper clamp and a lower clamp, and a coil for realizing electrical energy conversion and magnetic field coupling is wound on the iron core, and the oil passage is arranged adjacent to the coil and the iron core.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By setting up a cooling adjustment component, each rotation of the rotating ring aligns the docking hole on its outer side with the air inlet hole, forming a cooling airflow path. The remaining docking holes are sealed by a fixed sleeve to prevent cooling airflow leakage or turbulent entry into non-target areas, ensuring the system's energy utilization rate. After passing through the annular cavity of the rotating ring, the cooling airflow passes through the connected exhaust channel and flow groove in sequence until it enters the flow cavity of the arc plate. This design guides the cooling airflow smoothly into the flow cavity. The cooling airflow is evenly distributed in the flow cavity and ejected through several air blowing holes on the arc plate. As the arc plate rotates with the gear components, it blows the cold air around to the circumferential surface of the corresponding oil outlet pipe, achieving high-efficiency local air cooling, increasing the contact area between the cooling airflow and the surface of the oil outlet pipe, avoiding cooling blind spots and local heat accumulation that prevent timely heat dissipation, significantly improving the response efficiency of dynamic heat dissipation control, accelerating heat conduction and diffusion, and shortening the cooling time.

[0027] 2. By setting up an active airflow switching component and a lifting docking unit, the control system determines which oil outlet pipe has an excessively high temperature based on the temperature sensor data inside the oil outlet pipe. The rotary motor drives the second fixed part to rotate, achieving angle positioning. The linear guide rail drives the first fixed part to slide up and down, ensuring that it reaches the target height and that the sealing gasket is aligned with the opening of the air supply pipe. Then, the push unit starts and pushes the first fixed part, sealing and docking with the opening of the corresponding air supply pipe through the sealing gasket, achieving precise airflow switching for cooling. Active docking ensures that the airflow is concentrated and delivered to the channel that needs the most cooling, improving cooling efficiency.

[0028] 3. Each oil outlet pipe is surrounded by a cooling regulating component with airflow guidance. The airflow is delivered through the oil outlet pipe to the cooling coil, and then subjected to water bath forced cooling in the water-cooling jacket outside the cooling coil to reduce the temperature and improve the oil cooling rate. Attached Figure Description

[0029] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the installation structure of the connecting pipe rain radiator box of the present invention;

[0032] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0033] Figure 4 This is a three-dimensional exploded view of the gear component and rotating ring of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation structure of the air supply pipe and the fixing sleeve of the present invention;

[0035] Figure 6 For the present invention Figure 5 A magnified view of a section at point B.

[0036] In the diagram: 1. Transformer body; 2. Heat sink; 3. Cooling fan; 4. Cooling pipe; 5. Oil passage; 6. Coil; 7. Oil return pipe; 8. Iron core; 9. Oil outlet pipe; 10. Arc plate; 11. Flow chamber; 12. Air blower hole; 13. Gear component; 14. Fixing sleeve; 15. Rotating ring; 16. Flow groove; 17. Air inlet; 18. Connecting hole; 19. Exhaust duct; 20. Air supply pipe; 21. Opening; 22. Drive gear; 23. Sealing gasket ring; 24. Fixing part one; 25. Hose; 26. Push unit; 27. Linear guide rail; 28. Rotary motor; 29. ​​Fixing part two; 30. Mounting part; 31. Support rail plate; 32. Air inlet; 33. Fixing frame. Detailed Implementation

[0037] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0038] Please see Figures 1-6 As shown, the present invention provides a large transformer with active wind-guided cooling, including a transformer body 1, a heat sink 2 installed on the outside of the transformer body 1, and a plurality of oil channels 5 for discharging transformer oil on the inner edge of the transformer body 1. A cooling fan 3 is embedded on one side surface of the heat sink 2, and a plurality of oil outlet pipes 9 connected to the corresponding oil channels 5 are provided inside the heat sink 2. A cooling adjustment component for blowing cold air on the circumferential surface of the oil outlet pipe 9 is rotatably installed on the outside of each oil outlet pipe 9. Each oil channel 5 and oil outlet pipe 9 has a built-in temperature sensor.

[0039] The cooling adjustment assembly includes a rotary drive unit and an arc plate 10. The rotary drive unit includes a fixed sleeve 14 mounted on the outer wall of the transformer body 1. A rotating ring 15 for corresponding oil outlet pipe 9 to pass through is rotatably mounted inside the fixed sleeve 14. An air inlet 17 is provided on the side of the inner wall of the fixed sleeve 14 facing the cooling fan 3. An air supply pipe 20 connected to the air inlet 17 is provided on the outer side of the fixed sleeve 14.

[0040] The rotating ring 15 has several docking holes 18 on its outside, and the rotating ring 15 has an annular cavity that communicates with any one of the docking holes 18. Any one of the docking holes 18 is used in conjunction with the air inlet hole 17.

[0041] The rotating ring 15 has an exhaust channel 19 on one side and a gear 13 is fixed on one side of the rotating ring 15. Two adjacent gears 13 are meshed together, and the surface of the gear 13 is provided with a flow groove 16 that communicates with the exhaust channel 19.

[0042] The arc plate 10 has a flow cavity 11 connected to the flow groove 16 at one end near the gear component 13, and the inner wall of the arc plate 10 has a number of air blowing holes 12. The end of the arc plate 10 is connected to the gear component 13.

[0043] First, set a temperature threshold, collect the temperature inside each oil outlet pipe 9, and determine whether each oil outlet pipe 9 exceeds the threshold.

[0044] During the operation of the transformer body 1, the transformer oil inside it heats up due to the load. The hot oil is introduced into several oil outlet pipes 9 in the external heat dissipation box 2 through the oil passage 5, and the built-in temperature sensor is used to collect oil temperature data in real time and transmit it to the central control module.

[0045] When the oil temperature in a certain oil outlet pipe 9 is higher than the set threshold, the control module issues a command to drive the cooling adjustment component corresponding to that oil outlet pipe 9 to start operating.

[0046] The system adjusts its operation in real time based on temperature, and activates air cooling when localized high temperatures occur to reduce energy waste.

[0047] The cold air generated by the cooling fan 3 is delivered to the air inlet 17 through the air supply pipe 20;

[0048] The rotation of the rotating ring 15 is caused by the meshing of the gear 13. When the rotating ring 15 rotates once, the docking hole 18 on its outer side aligns and connects with the air inlet hole 17 to form a cooling airflow passage. The remaining docking holes 18 are blocked by the fixed sleeve 14, which will not cause leakage of cooling airflow. After the cooling airflow passes through the annular cavity of the rotating ring 15, it passes through the connected exhaust channel 19 and the flow groove 16 in sequence until it enters the flow cavity 11 of the arc plate 10. Through this design, the cooling airflow is guided to enter smoothly.

[0049] The cooling airflow is evenly distributed in the flow chamber 11 and ejected through several air holes 12 on the arc plate 10. As the arc plate 10 rotates with the gear component 13, the cold air is blown around to the circumferential surface of the corresponding oil outlet pipe 9, achieving high-efficiency local air cooling, increasing the contact area between the cooling airflow and the surface of the oil outlet pipe 9, avoiding cooling blind spots and local heat accumulation that prevent timely heat dissipation, greatly improving the response efficiency of dynamic heat dissipation control, accelerating heat conduction and diffusion, and shortening the cooling time.

[0050] See Figure 2 As shown, a drive gear 22 driven by a servo motor is installed inside the lower part of the heat sink 2, and the drive gear 22 meshes with the gear component 13 at the bottom.

[0051] When the built-in temperature sensor detects that the temperature of a certain oil outlet pipe 9 exceeds the set threshold, the control system sends a signal to drive the corresponding servo motor to start, which in turn drives the drive gear 22 to rotate.

[0052] When the drive gear 22 rotates, it causes the adjacent gear component 13 to rotate, and the gear component 13 drives the rotating ring 15 connected to it to rotate synchronously within the fixed sleeve 14.

[0053] This adjusts the position of the docking hole 18 in the rotating ring 15, so that the docking hole 18 is precisely aligned with the air inlet hole 17 on the fixed sleeve 14.

[0054] See Figure 4 As shown, one end of the air supply pipe 20 is provided with an opening 21, and the interior of the heat sink 2 is provided with a fixing frame 33 facing the air supply pipe 20, and the air supply pipe 20 is embedded in the fixing frame 33.

[0055] The cooling fan 3 has an air collection port 32 at its outlet.

[0056] The cooling airflow output by the cooling fan 3 is converged and rectified after passing through the air collector 32, making the airflow speed more stable and the direction more concentrated.

[0057] See Figure 6 As shown, an active airflow switching component is installed inside the mounting bracket 33. The active airflow switching component includes an air guide that rotates around the center of the air inlet 32. The air guide includes, from top to bottom, a connected fixing part 24, a flexible hose 25, and a fixing part 29.

[0058] Hose 25 provides multi-directional adaptability;

[0059] One side of the fixing part 24 is provided with a sealing gasket ring 23 that seals against the opening 21, and the other side of the fixing part 24 is provided with a lifting docking unit that mates the sealing gasket ring 23 with any one of the openings 21.

[0060] If the set temperature threshold is exceeded, the control system activates the cold air in that direction, the lifting docking unit drives the air guide to rotate and rise to the height of the corresponding air supply pipe 20, and the corresponding hose 25 expands and contracts.

[0061] At this time, the sealing ring 23 fits into the opening 21, and the cooling airflow is directed in this direction to achieve precise airflow switching for cooling. Active docking ensures that the airflow is concentrated into the channel that needs the most cooling, improves cooling efficiency, and avoids wind dispersion and uneven cooling effect.

[0062] Reduce the number of system fans and energy consumption, and improve system integration;

[0063] See Figure 6 As shown, the active wind direction switching component also includes a rotary motor 28 mounted on the middle surface of the mounting bracket 33. The drive end of the rotary motor 28 is connected to the second mounting part 29. The second mounting part 29 is rotatably connected to the mounting part 30. The mounting part 30 is sealed to the air inlet 32.

[0064] When the cooling fan 3 starts, air is blown out from the air collection port 32;

[0065] The control system determines which oil outlet pipe has an excessively high temperature based on the temperature sensor data inside the oil outlet pipe 9.

[0066] A command is sent to the rotary motor 28, which drives the fixed part 29 to rotate, thereby causing the entire air guide to rotate around the air inlet 32.

[0067] The air guide section then adjusts its angle to achieve precise alignment with the opening 21 of the target air supply duct 20;

[0068] After the airflow is guided, the cooling airflow is precisely directed into the cooling regulating component outside the abnormal temperature oil pipe 9, achieving directional heat dissipation and precisely controlling the target direction of the cooling airflow.

[0069] See Figure 6 As shown, the lifting docking unit includes a support rail plate 31 rotatably mounted on the outside of the air inlet 32, a linear guide rail 27 mounted on the support rail plate 31, a pushing unit 26 mounted on the slider of the linear guide rail 27, and the pushing end of the pushing unit 26 fixed to the fixing part 24.

[0070] One side of the fixing part 29 is fixedly connected to the end of the support rail plate 31 via a fixing bracket;

[0071] First, the rotary motor 28 drives the fixed part 29 to rotate, achieving angle positioning. The linear guide rail 27 drives the fixed part 24 to slide up and down, so that it reaches the target height, ensuring that the sealing gasket 23 is aligned with the opening 21 in the air supply pipe 20. Then, the push unit 26 starts and pushes the fixed part 24, so that the sealing gasket 23 seals and connects with the corresponding opening 21 of the air supply pipe 20, making tight contact and effectively preventing cold air leakage. No need for multiple fans or complex air supply channels.

[0072] After the docking is completed, the cooling airflow is precisely guided into the air supply pipe 20 through the air guide hose 25 and blown towards the high-temperature oil pipe 9.

[0073] See Figure 2 As shown, the ends of several oil outlet pipes 9 are connected to the same cooling coil 4. The cooling coil 4 is covered with a water-cooling jacket. A return oil pipe 7 connected to the cooling coil 4 is installed below the heat dissipation box 2. The end of the return oil pipe 7 extends into the inner cavity of the transformer body 1.

[0074] Inside the transformer body 1, an iron core 8 is installed via an upper clamp and a lower clamp. A coil 6, used to realize electrical energy conversion and magnetic field coupling, is wound on the iron core 8. The oil passage 5 is arranged adjacent to the coil 6 and the iron core 8.

[0075] When the transformer body 1 is working, the coil 6 and the iron core 8 serve as the main heat sources. The oil passage 5 located nearby will discharge the transformer oil with high heat. The outside of each oil outlet pipe 9 is surrounded by a cooling adjustment component with airflow guidance. The air is transported through the oil outlet pipe 9 to the cooling coil 4, and forced cooling is carried out in the water-cooled jacket outside the cooling coil 4. This synergistic cooling reduces the temperature and increases the oil cooling rate. The oil then flows back to the bottom of the transformer body 1 by gravity through the return oil pipe 7, completing the circulation heat dissipation.

[0076] In use, this invention, by setting up a cooling adjustment component, aligns and connects the outer docking hole 18 with the air inlet hole 17 with each rotation of the rotating ring 15, forming a cooling airflow passage. The remaining docking holes 18 are blocked by the fixing sleeve 14 to prevent the cooling airflow from leaking out or entering non-target areas in a disordered manner, thus ensuring the system's energy utilization rate. After passing through the annular cavity of the rotating ring 15, the cooling airflow passes through the connected exhaust channel 19 and the flow groove 16 in sequence until it enters the flow cavity 11 of the arc plate 10. This design guides the cooling airflow to enter smoothly. The cooling airflow is evenly distributed in the flow cavity 11 and ejected through several blowing holes 12 on the arc plate 10. As the arc plate 10 rotates with the gear component 13, it blows the cold air around to the circumferential surface of the corresponding oil outlet pipe 9, achieving high-efficiency local air cooling, increasing the contact area between the cooling airflow and the surface of the oil outlet pipe 9, avoiding cooling blind spots and local heat accumulation that prevent timely heat dissipation, greatly improving the response efficiency of dynamic heat dissipation control, accelerating heat conduction and diffusion, and shortening the cooling time.

[0077] By setting up an active airflow switching component and a lifting docking unit, the control system determines which oil outlet pipe has an excessively high temperature based on the temperature sensor data inside the oil outlet pipe 9. The rotary motor 28 drives the fixed part 29 to rotate, achieving angle positioning. The linear guide rail 27 drives the fixed part 24 to slide up and down, making it reach the target height, ensuring that the sealing gasket 23 is aligned with the opening 21 in the air supply pipe 20. Then, the push unit 26 starts and pushes the fixed part 24, sealing and docking the sealing gasket 23 with the corresponding opening 21 of the air supply pipe 20, achieving precise airflow switching cooling. The active docking ensures that the airflow is concentrated and sent to the channel that needs the most cooling, improving cooling efficiency.

[0078] Each oil outlet pipe 9 is surrounded by a cooling regulating component with airflow guidance. The airflow is delivered through the oil outlet pipe 9 to the cooling coil 4, where it undergoes water bath forced cooling in the water-cooled jacket outside the cooling coil 4, thus reducing the temperature and increasing the oil cooling rate.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A large transformer with active wind-guided cooling, comprising a transformer body (1), wherein a heat sink (2) is installed on the outer side of the transformer body (1), characterized in that: The transformer body (1) has several oil channels (5) for draining transformer oil on its inner edge. A cooling fan (3) is embedded on one side surface of the heat sink (2). The heat sink (2) has several oil outlet pipes (9) connected to the corresponding oil channels (5) inside. A cooling adjustment component for blowing cold air on the circumferential surface of the oil outlet pipe (9) is rotatably installed on the outside of each oil outlet pipe (9). Each oil channel (5) and oil outlet pipe (9) has a built-in temperature sensor. The cooling adjustment assembly includes a rotary drive unit and an arc plate (10). The rotary drive unit includes a fixed sleeve (14) installed on the outer wall of the transformer body (1). The fixed sleeve (14) has a rotating ring (15) rotatably installed inside for the oil outlet pipe (9) to pass through. The inner wall of the fixed sleeve (14) is provided with an air inlet (17) on the side facing the cooling fan (3). The outer side of the fixed sleeve (14) is provided with an air supply pipe (20) connected to the air inlet (17). The rotating ring (15) has several docking holes (18) on its outside, and the rotating ring (15) has an annular cavity that communicates with any one of the docking holes (18) inside. Any one of the docking holes (18) is used in conjunction with the air inlet (17). The rotating ring (15) has an exhaust channel (19) on one side and a gear (13) is fixed on one side of the rotating ring (15). Two adjacent gears (13) are meshed together. The surface of the gear (13) is provided with a flow groove (16) that communicates with the exhaust channel (19). The arc plate (10) has a flow cavity (11) connected to the flow groove (16) at one end near the gear component (13), and the inner wall of the arc plate (10) has several air holes (12). The end of the arc plate (10) is connected to the gear component (13).

2. A large transformer with active wind-guided cooling according to claim 1, characterized in that, Inside the heat sink (2), a drive gear (22) driven by a servo motor is installed at the bottom, and the drive gear (22) meshes with the gear component (13) at the bottom.

3. A large transformer with active wind-guided cooling according to claim 1, characterized in that, One end of the air supply pipe (20) is provided with an opening (21), and the interior of the heat dissipation box (2) is provided with a fixing frame (33) facing the air supply pipe (20), and the air supply pipe (20) is embedded in the fixing frame (33); The cooling fan (3) is provided with an air collection port (32) at its air outlet.

4. A large transformer with active wind-guided cooling according to claim 3, characterized in that, The fixed frame (33) is equipped with an active air direction switching component. The active air direction switching component includes an air guide that rotates around the center of the air inlet (32). The air guide includes, from top to bottom, a connected fixed part one (24), a hose (25), and a fixed part two (29). One side of the fixing part (24) is provided with a sealing gasket (23) that seals against the opening (21), and the other side of the fixing part (24) is provided with a lifting docking unit that connects the sealing gasket (23) with any one of the openings (21).

5. A large transformer with active wind-guided cooling according to claim 4, characterized in that, The active wind direction switching component also includes a rotary motor (28) installed on the middle surface of the fixed frame (33). The drive end of the rotary motor (28) is connected to the second fixed part (29). The second fixed part (29) is rotatably connected to the mounting part (30). The mounting part (30) is sealed to the air inlet (32).

6. A large transformer with active wind-guided cooling according to claim 4, characterized in that, The lifting docking unit includes a support rail plate (31) rotatably installed on the outside of the air inlet (32), a linear guide rail (27) is installed on the support rail plate (31), a pushing unit (26) is installed on the slider of the linear guide rail (27), and the pushing end of the pushing unit (26) is fixed to the fixing part (24). One side of the fixing part 2 (29) is fixedly connected to the end of the support rail plate (31) by a fixing bracket.

7. A large transformer with active wind-guided cooling according to claim 1, characterized in that, The ends of several oil outlet pipes (9) are connected to the same cooling pipe (4), the cooling pipe (4) is covered with a water-cooled jacket, and an oil return pipe (7) connected to the cooling pipe (4) is installed below the heat sink (2), the end of the oil return pipe (7) extends into the inner cavity of the transformer body (1).

8. A large transformer with active wind-guided cooling according to claim 1, characterized in that, The transformer body (1) has an iron core (8) installed inside through an upper clamp and a lower clamp. A coil (6) for realizing power conversion and magnetic field coupling is wound on the iron core (8). The oil passage (5) is arranged adjacent to the coil (6) and the iron core (8).

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