Large transformer with initiative wind guide control cooling function

Abstract

The invention discloses a large transformer with initiative wind guide control cooling, and particularly relates to the technical field of air compressors. A cooling adjusting assembly is arranged, a butt joint hole in the outer side of a rotating ring is aligned and communicated with an air inlet hole every time the rotating ring rotates, a cooling airflow channel is formed, and the other butt joint holes are blocked by fixing sleeves; after passing through the ring cavity of the rotating ring, the cooling air flow sequentially passes through the communicated exhaust hole channel and the circulating groove until entering the circulating cavity of the arc-shaped plate, so that the cooling air flow is guided to smoothly enter; cooling airflow is evenly distributed in the circulation cavity and ejected out through a plurality of air blowing holes in the arc-shaped plate, the arc-shaped plate rotates along with the gear piece, cold air is blown to the circumferential surface of the corresponding oil outlet pipe in a surrounding mode, high-efficiency local air cooling is achieved, and the contact area between the cooling airflow and the surface of the oil outlet pipe is increased; the situation that heat cannot be dissipated in time due to a cooling blind area and local heat accumulation is avoided, the response efficiency of dynamic heat dissipation control is greatly improved, heat conduction and diffusion are accelerated, and the cooling time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, in particular to a large transformer with active wind-guided cooling. Background Art

[0002] Large transformers generate significant heat during long-term operation due to factors such as load fluctuations, iron and copper losses, and other factors. Failure to dissipate heat promptly and effectively can easily lead to insulation aging, excessive oil temperatures, reduced efficiency, and even safety incidents such as thermal breakdown. Therefore, an efficient cooling system is crucial to ensuring the operational reliability of large transformers.

[0003] After searching, the invention patent with publication number CN111326321A discloses an automatic control large transformer cooling device with good cooling effect. The temperature of the transformer oil is detected by a temperature sensor, and the operation of the circulation pump, fan and motor is automatically controlled by a controller, thereby realizing automatic control of transformer cooling.

[0004] In traditional structures, fan cooling often adopts fixed air outlets or global air delivery methods, which has low wind energy utilization rate, makes it difficult to effectively dissipate heat in local hot spots, and some areas are in dead corners of wind flow, which easily form heat accumulation areas. The lack of dynamic wind flow guidance structure makes it impossible to conduct and diffuse heat in time, reducing the safety of equipment operation. In addition, the cooling air acts evenly or simultaneously on all areas, lacks active wind direction switching, and easily causes some areas to be overcooled while key areas are undercooled. The wind energy utilization rate is not high and the system energy consumption is high. Summary of the Invention

[0005] The object of the present invention is to provide a large transformer with active wind-guided cooling to solve the problems mentioned in the above background technology.

[0006] The technical problems mainly solved by the present invention are:

[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 corners of airflow, which easily form heat accumulation areas. There is a lack of dynamic airflow guidance structure.

[0008] The cooling air acts evenly or simultaneously on all areas, and there is a lack of active wind direction switching, which can easily cause some areas to be overcooled while key areas are undercooled, resulting in low wind energy utilization.

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

[0010] A large transformer with active wind-guided cooling comprises a transformer body, a heat sink mounted on the outside of the transformer body, a plurality of oil passages for draining transformer oil provided on the inner edge of the transformer body, a cooling fan embedded in one side surface of the heat sink, and a plurality of oil outlet pipes connected to corresponding oil passages provided inside the heat sink. A cooling adjustment assembly for blowing cold air toward the circumferential surface of each oil outlet pipe is rotatably mounted on the outside of each oil outlet pipe, and each oil passage and oil outlet pipe has a built-in temperature sensor.

[0011] The cooling adjustment assembly includes a rotary drive unit and an arc-shaped plate. The rotary drive unit includes a fixed sleeve mounted on the outer wall of the transformer body. A rotating ring for the oil outlet pipe to pass through is rotatably mounted 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 is provided with a plurality of docking holes on the outside, and a ring cavity is provided on the inside of the rotating ring that communicates with any of the docking holes, and any of the docking holes is used in conjunction with the air inlet hole;

[0013] An exhaust hole is provided on one side of the rotating ring, and a gear is fixed on one side of the rotating ring, two adjacent gears are meshed, and a flow groove is provided on the surface of the gear that communicates with the exhaust hole;

[0014] A circulation cavity communicating with the circulation groove is provided at one end of the arc plate close to the gear part, and a plurality of blowing holes are provided on the inner wall surface of the arc plate. The end of the arc plate is connected to the gear part.

[0015] A further technical improvement of the present invention is that a driving tooth driven by a servo motor is installed at the lower part of the heat dissipation box, and the driving tooth is engaged with a gear member at the bottom.

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

[0017] The air outlet of the cooling fan is provided with an air collecting port.

[0018] A further technical improvement of the present invention is that an active wind direction switching assembly is installed inside the fixing frame, and the active wind direction switching assembly includes an air guide portion rotating around the center of the air collecting port, and the air guide portion includes, from top to bottom, a fixed portion 1, a hose, and a fixed portion 2 that are connected to each other;

[0019] A sealing gasket ring is provided on one side of the fixing part 1 and is in sealing contact with the opening, and a lifting docking unit is provided on the other side of the fixing part 1 and is used to dock 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 rotating motor installed on the middle surface of the fixed frame, the driving end of the rotating 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 with the air collecting port.

[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 collecting port, 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 a pushing end of the pushing unit is fixed to a fixing portion;

[0022] One side of the second fixing portion is fixedly connected to the end of the supporting rail plate through 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 pipe, the outside of the cooling pipe is covered with a water-cooling jacket, and an oil return pipe connected to the cooling pipe is installed under the heat dissipation box, and the end of the oil return pipe extends 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 upper and lower clamps, a coil for realizing power conversion and magnetic field coupling is wound around the iron core, and the oil channel 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 a cooling adjustment component, each time the rotating ring rotates, the docking hole on its outer side is aligned and connected with the air inlet hole to form a cooling airflow path, and the remaining docking holes are blocked by a fixed sleeve to prevent the cooling airflow from leaking or turbulently entering non-target areas, thereby ensuring the energy utilization rate of the system. After passing through the annular cavity of the rotating ring, the cooling airflow passes through the connected exhaust duct and the circulation groove in sequence until it enters the circulation cavity of the curved plate. Through this design, the cooling airflow is guided to enter smoothly; the cooling airflow is evenly distributed in the circulation cavity and ejected through a number of blowing holes on the curved plate. Since the curved plate rotates with the gear part, the cold air is blown around to the circumferential surface of the corresponding oil outlet pipe, realizing 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 cannot dissipate heat in time, greatly 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 air direction switching component and a lifting and 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 to achieve angular positioning, and the linear guide drives the first fixed part to slide up and down to reach the target height, ensuring that the sealing ring is aligned with the air supply pipe opening. The pushing unit then starts and pushes the first fixed part, sealing and docking it with the corresponding air supply pipe opening through the sealing ring, achieving close contact and precise air direction switching and cooling. Active docking ensures that the airflow is concentrated and sent to the channel that needs cooling most, thereby improving cooling efficiency.

[0028] 3. The outside of each oil outlet pipe is surrounded by a cooling adjustment component with air guide control, and air is transported to the cooling pipe through the oil outlet pipe. It is then forced to cool in a water bath in the water cooling jacket outside the cooling pipe, which synergistically reduces the temperature and improves the oil cooling rate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 1 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 heat dissipation box of the present invention;

[0032] Figure 3 For the present invention Figure 2 A partial enlarged view of point A in the middle;

[0033] Figure 4 It is a schematic diagram of the exploded structure of the gear part and the 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 partial enlarged view of point B in the middle.

[0036] In the figure: 1. Transformer body; 2. Heat sink; 3. Cooling fan; 4. Cooling exhaust pipe; 5. Oil channel; 6. Coil; 7. Oil return pipe; 8. Iron core; 9. Oil outlet pipe; 10. Arc plate; 11. Circulation cavity; 12. Blowing hole; 13. Gear part; 14. Fixed sleeve; 15. Rotating ring; 16. Circulation groove; 17. Air inlet hole; 18. Docking hole; 19. Exhaust duct; 20. Air supply pipe; 21. Opening; 22. Driving gear; 23. Sealing gasket; 24. Fixed part 1; 25. Hose; 26. Pushing unit; 27. Linear guide; 28. Rotating motor; 29. ​​Fixed part 2; 30. Mounting part; 31. Support rail plate; 32. Air collecting port; 33. Fixed frame. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0038] See also 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 is installed on the outside of the transformer body 1, and a plurality of oil channels 5 for draining transformer oil are provided on the inner edge of the transformer body 1, a cooling fan 3 is embedded in 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 to the circumferential surface of each oil outlet pipe 9 is rotatably installed on the outside of each oil outlet pipe 9, and each oil channel 5 and oil outlet pipe 9 has a built-in temperature sensor;

[0039] The cooling and regulating assembly includes a rotary drive unit and an arc-shaped 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 is rotatably mounted inside the fixed sleeve 14 for the oil outlet pipe 9 to pass through. An air inlet hole 17 is provided on the middle of the inner wall of the fixed sleeve 14 facing the cooling fan 3. An air supply pipe 20 connected to the air inlet hole 17 is provided on the outer side of the fixed sleeve 14.

[0040] The outside of the rotating ring 15 is provided with a plurality of docking holes 18, and the inside of the rotating ring 15 is provided with an annular cavity communicating with any of the docking holes 18, and any of the docking holes 18 is used in conjunction with the air inlet hole 17;

[0041] An exhaust hole 19 is provided on one side of the rotating ring 15 , and a gear member 13 is fixed on one side of the rotating ring 15 , two adjacent gear members 13 are meshed, and a flow groove 16 is provided on the surface of the gear member 13 that communicates with the exhaust hole 19 ;

[0042] A circulation cavity 11 is provided at one end of the arc plate 10 near the gear member 13 and communicates with the circulation groove 16. A plurality of blowing holes 12 are provided on the inner wall of the arc plate 10. The end of the arc plate 10 is connected to the gear member 13.

[0043] First, a temperature threshold is set, the temperature in each oil outlet pipe 9 is collected, and it is determined whether each oil outlet pipe 9 exceeds the threshold;

[0044] During the operation of the transformer body 1, the temperature of the transformer oil inside it rises due to the heat generated by the load. The hot oil is introduced into the several oil outlet pipes 9 in the external heat dissipation box 2 through the oil channel 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 the oil outlet pipe 9 to start operation;

[0046] Adjust in real time according to the temperature, and enable air cooling when local high temperature occurs to reduce energy waste;

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

[0048] The rotation of the rotating ring 15 is meshed with the gear member 13. Each time the rotating ring 15 rotates, the outer docking hole 18 aligns and connects with the air inlet 17, forming a cooling airflow path. The remaining docking holes 18 are blocked by the fixed sleeve 14 to prevent leakage of the cooling airflow. After passing through the annular cavity of the rotating ring 15, the cooling airflow passes through the connected exhaust duct 19 and the flow groove 16 in sequence until it enters the flow cavity 11 of the curved plate 10. This design guides the cooling airflow into the cavity smoothly.

[0049] The cooling air flow is evenly distributed in the circulation cavity 11 and ejected through a plurality of blowing holes 12 on the arc plate 10. Since the arc plate 10 rotates following the gear part 13, the cold air is blown around the circumferential surface of the corresponding oil outlet pipe 9, achieving high-efficiency local air cooling, increasing the contact area between the cooling air flow and the surface of the oil outlet pipe 9, avoiding cooling blind spots and local heat accumulation that lead to failure to dissipate heat in time, 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 driving gear 22 driven by a servo motor is installed at the bottom of the heat dissipation box 2, and the driving gear 22 is engaged with the gear member 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, driving the driving gear 22 to rotate;

[0052] When the driving teeth 22 rotate, the adjacent gear member 13 rotates, and the gear member 13 drives the rotating ring 15 connected thereto to rotate synchronously in the fixed sleeve 14;

[0053] The position of the docking hole 18 in the rotating ring 15 is thereby adjusted so that the docking hole 18 is precisely aligned with the air inlet hole 17 on the fixing sleeve 14 .

[0054] See Figure 4 As shown, an opening 21 is provided at one end of the air supply pipe 20, and a fixing frame 33 is provided on the side of the interior of the heat dissipation box 2 facing the air supply pipe 20, and the air supply pipe 20 is embedded in the fixing frame 33;

[0055] The air outlet of the cooling fan 3 is provided with an air collecting port 32;

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

[0057] See Figure 6 As shown, an active wind direction switching assembly is installed inside the fixing frame 33. The active wind direction switching assembly includes an air guide portion rotating around the center of the air collecting port 32. The air guide portion includes, from top to bottom, a fixed portion 1 24, a hose 25, and a fixed portion 29 that are connected to each other.

[0058] The hose 25 provides multi-directional adaptability;

[0059] A sealing ring 23 is provided on one side of the fixing portion 24 to seal against the opening 21, and a lifting docking unit is provided on the other side of the fixing portion 24 to dock the sealing 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, and the lifting docking unit drives the air guide to rotate and lift to the height corresponding to the air supply pipe 20, and the corresponding hose 25 expands and contracts;

[0061] At this time, the sealing ring 23 fits with the opening 21, and the cooling airflow is directed in this direction, achieving precise wind direction switching cooling and active docking, ensuring that the airflow is concentrated into the channel that needs cooling most, improving cooling efficiency, and avoiding wind dispersion and uneven cooling effect;

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

[0063] See Figure 6 As shown, the active wind direction switching assembly further includes a rotating motor 28 mounted on the middle surface of the fixing frame 33. The driving end of the rotating motor 28 is connected to the second fixing portion 29. The second fixing portion 29 is rotatably connected to the mounting portion 30. The mounting portion 30 is sealed with the air collecting port 32.

[0064] When the cooling fan 3 is started, the wind blows out from the air collecting port 32;

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

[0066] Sending a command to the rotating motor 28 to drive the second fixed part 29 to rotate, driving the entire air guide part to rotate around the air collecting port 32;

[0067] The air guide portion adjusts its angle accordingly and precisely docks with the opening 21 of the target air supply pipe 20;

[0068] After the air guide is completed, the cooling air flow is accurately blown into the cooling adjustment component outside the temperature-abnormal oil pipe 9, achieving directional heat dissipation and accurately controlling the target direction of the cooling air flow.

[0069] See Figure 6 As shown, the lifting docking unit includes a support rail plate 31 rotatably mounted on the outside of the air collecting port 32, a linear guide rail 27 is mounted on the support rail plate 31, a push unit 26 is mounted on the slider of the linear guide rail 27, and a push end of the push unit 26 is fixed to the fixing portion 24;

[0070] One side of the second fixing portion 29 is fixedly connected to the end of the support rail 31 through a fixing bracket;

[0071] First, the rotary motor 28 drives the second fixing part 29 to rotate to achieve angular positioning, and the linear guide 27 drives the first fixing part 24 to slide up and down to reach the target height, ensuring that the sealing ring 23 is aligned with the opening 21 in the air supply pipe 20. Then the pushing unit 26 starts and pushes the first fixing part 24, which is sealed and connected with the corresponding opening 21 of the air supply pipe 20 through the sealing ring 23. The tight contact effectively prevents cold air leakage without the need for multiple fans or complex air supply channels;

[0072] After the docking is completed, the cooling air flow is accurately introduced into the air supply pipe 20 through the air guide hose 25 and blown toward 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 pipe 4, the outside of the cooling pipe 4 is covered with a water cooling jacket, and an oil return pipe 7 connected to the cooling pipe 4 is installed below the heat dissipation box 2, and the end of the oil return pipe 7 extends into the inner cavity of the transformer body 1;

[0074] An iron core 8 is mounted inside the transformer body 1 via upper and lower clamps. A coil 6 for achieving power conversion and magnetic field coupling is wound around the iron core 8. The oil channel 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 channel 5 arranged nearby will drain the transformer oil with higher heat. The outer side of each oil outlet pipe 9 is surrounded by a cooling adjustment component with wind guide control to blow air. The air is transported to the cooling pipe 4 through the oil outlet pipe 9 and is forced to be cooled in a water bath in the water cooling jacket outside the cooling pipe 4. The temperature is synergistically reduced, the cooling rate of the oil is increased, and the oil is gravity-returned to the bottom of the transformer body 1 through the return oil pipe 7, completing the circulation heat dissipation.

[0076] When the present invention is in use, by setting a cooling adjustment component, each time the rotating ring 15 rotates once, the docking hole 18 on its outer side is aligned and connected with the air inlet hole 17 to form a cooling air flow path, and the remaining docking holes 18 are blocked by the fixed sleeve 14 to prevent the cooling air flow from leaking out or turbulently entering non-target areas, thereby ensuring the energy utilization rate of the system. After passing through the annular cavity of the rotating ring 15, the cooling air flow passes through the connected exhaust duct 19 and the circulation groove 16 in sequence until it enters the circulation cavity 11 of the curved plate 10. Through this design, the cooling air flow is guided to enter smoothly; the cooling air flow is evenly distributed in the circulation cavity 11 and ejected through the multiple blowing holes 12 on the curved plate 10. Since the curved plate 10 rotates with the gear part 13, the cold air is blown around to the circumferential surface of the corresponding oil outlet pipe 9, thereby achieving high-efficiency local air cooling, increasing the contact area between the cooling air flow and the surface of the oil outlet pipe 9, avoiding the situation where cooling blind spots and local heat accumulation cannot dissipate heat in time, 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 wind direction switching component and a lifting docking unit, the control system determines which oil outlet pipe has too high a temperature based on the temperature sensor data inside the oil outlet pipe 9; the rotating motor 28 drives the fixing part 29 to rotate to achieve angle positioning, and the linear guide 27 drives the fixing part 1 24 to slide up and down to reach the target height, ensuring that the sealing gasket 23 is aligned with the opening 21 in the air supply pipe 20. Then the pushing unit 26 starts and pushes the fixing part 1 24, and the sealing gasket 23 is sealed and docked with the corresponding opening 21 of the air supply pipe 20, achieving close contact, realizing precise wind direction switching cooling, active docking, ensuring that the airflow is concentrated and sent to the channel that needs cooling most, and improving cooling efficiency;

[0078] The outside of each oil outlet pipe 9 is surrounded by a cooling adjustment component with wind guidance control, and air is transported to the cooling pipe 4 through the oil outlet pipe 9, and is forced to be cooled in a water bath in the water cooling jacket outside the cooling pipe 4, which synergistically reduces the temperature and improves the oil cooling rate.

[0079] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A large transformer with active wind-guided cooling, comprising a transformer body (1), a heat sink (2) installed on the outside of the transformer body (1), characterized in that: The inner edge of the transformer body (1) is provided with a plurality of oil passages (5) for draining transformer oil, a cooling fan (3) is embedded in one side surface of the heat dissipation box (2), and a plurality of oil outlet pipes (9) communicating with the corresponding oil passages (5) are provided inside the heat dissipation box (2), a cooling adjustment component for blowing cold air to the circumferential surface of the oil outlet pipe (9) is rotatably mounted on the outer side of each oil outlet pipe (9), and each oil passage (5) and oil outlet pipe (9) is equipped with a built-in temperature sensor; The cooling adjustment assembly includes a rotary drive unit and an arc-shaped plate (10), wherein the rotary drive unit includes a fixed sleeve (14) mounted on the outer wall surface of the transformer body (1), wherein a rotating ring (15) for correspondingly passing the oil outlet pipe (9) is rotatably mounted inside the fixed sleeve (14), and an air inlet hole (17) is provided on the side of the inner wall surface of the fixed sleeve (14) facing the cooling fan (3), and an air supply pipe (20) connected to the air inlet hole (17) is provided on the outer side of the fixed sleeve (14); The rotating ring (15) is provided with a plurality of docking holes (18) on the outside, and an annular cavity communicating with any docking hole (18) is provided on the inside of the rotating ring (15), and any docking hole (18) is used in conjunction with the air inlet hole (17); An exhaust duct (19) is provided on one side of the rotating ring (15), and a gear member (13) is fixed on one side of the rotating ring (15), two adjacent gear members (13) are meshed, and a flow groove (16) communicating with the exhaust duct (19) is provided on the surface of the gear member (13); A circulation cavity (11) communicating with the circulation groove (16) is provided at one end of the arc-shaped plate (10) near the gear part (13), and a plurality of blowing holes (12) are provided on the inner wall surface of the arc-shaped plate (10). The end of the arc-shaped plate (10) is connected to the gear part (13).

2. A large transformer with active wind-guided cooling according to claim 1, characterized in that: A driving tooth (22) driven by a servo motor is installed at the lower part of the heat dissipation box (2), and the driving tooth (22) is engaged with a gear member (13) at the bottom.

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

4. The large transformer with active wind-guided cooling according to claim 3, characterized in that: An active wind direction switching assembly is installed inside the fixing frame (33), and the active wind direction switching assembly includes an air guide portion rotating around the center of the air collecting port (32), and the air guide portion includes, from top to bottom, a fixed portion 1 (24), a hose (25), and a fixed portion 2 (29) that are connected to each other; A sealing gasket (23) is provided on one side of the fixing portion (24) for sealingly contacting the opening (21), and a lifting docking unit is provided on the other side of the fixing portion (24) for docking the sealing gasket (23) with any one of the openings (21).

5. The large transformer with active wind-guided cooling according to claim 4, characterized in that: The active wind direction switching assembly further comprises a rotating motor (28) mounted on the middle surface of the fixing frame (33), a driving end of the rotating motor (28) being connected to the second fixing portion (29), the second fixing portion (29) being rotatably connected to the mounting portion (30), and the mounting portion (30) being sealed to the air collecting port (32).

6. The 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 mounted on the outside of the air collecting port (32), a linear guide rail (27) is mounted on the support rail plate (31), a push unit (26) is mounted on the slider of the linear guide rail (27), and a push end of the push unit (26) is fixed to a fixing portion (24); One side of the second fixing portion (29) is fixedly connected to the end of the supporting rail plate (31) through a fixing bracket.

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

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

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