A single phase 1000 hertz dry type transformer

Abstract

The application discloses a single-phase 1000Hz dry-type transformer, which comprises a transformer core, an upper clamp and a lower clamp, the upper clamp and the lower clamp are locked and installed at the upper and lower ends of the transformer core, high-voltage coils and low-voltage coils are vertically stacked from bottom to top at the vertical core body of the transformer core, and the dry-type transformer further comprises air supply mechanisms and cold circulation mechanisms, air ducts are arranged along the axial direction of the coils at the low-voltage coils and the high-voltage coils of the dry-type transformer, four groups of air supply mechanisms are installed at the lower clamp to accurately direct air supply to the bottom of the high-voltage coils to realize wind force through-type heat dissipation, the cold circulation mechanisms are arranged at two groups of the air supply mechanisms, dry cold air in a factory is introduced to form a cold source through flat tube fins, air is blown from top to bottom at the outward coils after wind force cooling in the moon mouth vertical seat to take away heat, thereby forming a wind cooling circulation of downward sending and upward returning, effective heat dissipation of the dry-type transformer is guaranteed, and vicious circulation caused by overheating of the dry-type transformer is avoided.

Description

Technical Field

[0001] This invention relates to the field of single-phase dry-type transformer technology, and particularly to a single-phase 1000 Hz dry-type transformer. Background Technology

[0002] The single-phase 1000Hz dry-type transformer is a special product in environmental protection projects. It is a special transformer used in special industries. It is a static electrical device used in single-phase power supply systems, without insulating oil medium, and relying on air cooling. Its core function is to realize AC voltage transformation and safe power transmission. The primary voltage is 450V and 530V, and the secondary voltage is 5500V, 6000V, and 6500V. It is a step-up transformer. Due to the small transformer capacity, the turn potential is also small, and the number of turns is relatively large. Considering the special requirements for coil field strength, the interlayer field strength of the coil is required to be no more than 250V / mm.

[0003] Because the windings of existing dry-type transformers are not immersed in insulating oil, their heat dissipation during use mainly relies on air cooling. Dry-type transformers will generate three types of unavoidable losses during operation. The first is copper loss, which is the heat generated by the resistance when the current passes through the winding coil. The greater the load and the greater the current, the higher the copper loss. All of these losses are converted into heat.

[0004] Secondly, there is iron loss, which is the eddy current loss and hysteresis loss generated by the iron core in the alternating magnetic field. As long as the equipment is energized, iron loss will continue to exist.

[0005] Thirdly, there are stray losses, such as additional heat generated by leakage flux and eddy currents in structural components;

[0006] Temperature is a key factor affecting the lifespan of dry-type transformers. Insufficient heat dissipation in dry-type transformers can lead to excessively high winding temperatures, which can cause insulation aging and embrittlement, eventually resulting in inter-turn short circuits. Furthermore, overheating of the core can exacerbate hysteresis losses, creating a vicious cycle of overheating, increased losses, and even more heat, which can even burn out the equipment in severe cases.

[0007] Existing dry-type transformers typically rely on internal fans within the transformer enclosure for upward ventilation and heat dissipation. This simple cooling mechanism has limited effectiveness for dry-type transformers. Furthermore, this bottom-flow upward cooling method can easily introduce excessive moisture in humid mountainous areas or basements, leading to potential moisture corrosion during heat dissipation in both dry and wet transformers. Therefore, we propose a single-phase 1000 Hz dry-type transformer. Summary of the Invention

[0008] The main objective of this invention is to provide a single-phase 1000Hz dry-type transformer. By installing air ducts along the coil axis at the low-voltage and high-voltage coils of the dry-type transformer, and installing four sets of air supply mechanisms at the lower clamp to precisely direct airflow to the bottom of the high-voltage coil, a through-flow cooling system is achieved. Two of the air supply mechanisms are equipped with a cold circulation mechanism. Dry, cool air from the factory is introduced and forms a cold source through flat tube fins. After being cooled by airflow within the vertical seat, it is blown downwards towards the coil to remove heat, thus forming a bottom-supply, top-return air-cooling cycle. This ensures effective heat dissipation of the dry-type transformer and prevents a vicious cycle of overheating. Furthermore, the dry, cool air introduced by the cold circulation mechanism and the cooling airflow form a downward-blowing airflow. This downward-blowing airflow, after passing through the coil air ducts, forms dry, hot air, which actively disperses humid air around the lower clamp, reducing moisture intrusion into the transformer. The inner ring seat has a built-in fan filter cotton, which not only filters inlet impurities to prevent insulation contamination but also helps to prevent moisture from directly entering the cooling fan. This effectively solves the problem of moisture erosion when the transformer is cooled by airflow in humid areas, and effectively addresses the problems in the background art.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A single-phase 1000 Hz dry-type transformer includes a transformer core, an upper clamp, and a lower clamp. The upper and lower clamps are locked together at the upper and lower ends of the transformer core. A high-voltage coil and a low-voltage coil are vertically stacked from bottom to top at the vertical core of the transformer core. The transformer core also includes an air supply mechanism and a cooling circulation mechanism. The air supply mechanism for blowing upward air to cool the high-voltage coil and the low-voltage coil is symmetrically installed in the U-shaped slot of the lower clamp. The cooling fan of the air supply mechanism supplies air upward below and outside the high-voltage coil. The cooling fan extends out of the shell surface of the high-voltage coil and is equipped with a cooling circulation mechanism for directing the air to the top of the low-voltage coil for side and surface cooling. Flat tube fins for introducing a cold source for air cooling are inserted and welded into the vertical seat of the cooling circulation mechanism for air intake.

[0011] Furthermore, the air supply mechanism includes an inner stepped ring seat, a cooling fan, and an L-shaped support plate. The cooling fan is bolted to the top of the seat of the inner stepped ring seat, and an L-shaped support plate is welded to one side of the seat of the inner stepped ring seat. The L-shaped support plate is bolted to the groove of the lower clamp, and the air outlet of the cooling fan faces the lower coil of the high-voltage coil.

[0012] By adopting the above-mentioned preferred technical solution, the inner stepped ring seat can be installed in the groove of the lower clamp with an L-shaped support plate and bolts. Then, the cooling fan can blow air upwards at the inner stepped ring seat with the help of bolts, so that the air force carries away the heat upwards through the high voltage coil and the low voltage coil.

[0013] Furthermore, a cooling circulation mechanism is installed above the housing of the cooling fan, and the cooling circulation mechanism includes a crescent-shaped vertical seat, a crescent-shaped arc-shaped seat, a crescent-shaped groove plate, a bend plate, flat tube fins, a transfer arc box, an inlet solenoid, an outlet pipe, and a C-shaped connecting pipe. A crescent-shaped vertical seat for distributing cooling airflow is installed above the base of the cooling fan, and a crescent-shaped arc-shaped seat is integrally formed on one side of the top of the crescent-shaped vertical seat. The seats of the crescent-shaped vertical seat and the crescent-shaped arc-shaped seat are interconnected, and a crescent-shaped groove plate is fitted into the lower seat opening of the crescent-shaped arc-shaped seat facing the low-voltage coil. An elbow plate is welded to the outside of the body, and the elbow plate is locked to the outside of the seat body of the lunar arc seat by bolts. A flat tube fin is inserted and welded into the vertical seat body of the lunar arc seat, and a transfer arc box is welded to the outer tube opening of the flat tube fin. The transfer arc box is symmetrically welded with an inlet screw pipe for receiving cold air from the factory air conditioner and an outlet pipe for discharging cold air. A C-shaped connecting pipe is screwed into the outlet pipe. A fan-shaped expansion box facing the lower part of the inner ring seat is screwed onto the C-shaped connecting pipe away from the outlet pipe.

[0014] By adopting the above-mentioned preferred technical solution, after the vertical seat is installed above the cooling fan, it can guide the airflow from the cooling fan upwards to the arc-shaped seat. The arc-shaped groove plate, fitted below the arc-shaped seat and secured with a bend plate using bolts, allows the airflow within the arc-shaped seat to flow downwards along the air ducts of the low-voltage and high-voltage coils, carrying away heat. Then, the connecting pipe outside the upper side of the transfer arc box can be connected to an external pipe under the guidance of professional pipe installers. This external pipe can be installed along the wall from the transformer area to near the air conditioner outlet. A horn-shaped shroud is installed at the end of the external pipe to cover the air conditioner outlet and receive the cool air. This allows the dry cool air from the factory air conditioner to enter the transfer arc box along the pipe. After entering the transfer arc box, the cool air can be cooled by the flat tube fins. The cooling source is provided at the plate, so that there is a cooling source in the vertical seat of the moon gate that can cool the rising air. The air in the vertical seat of the moon gate has a good cooling effect after cooling, so that the air blown down from the low voltage coil and the high voltage coil can effectively remove heat for cooling. Then, the airflow in the transfer arc box can be discharged below the environment of the transformer after the outlet pipe is connected to the fan-shaped expansion box through the C-shaped connecting pipe. The airflow can be drawn upward by the cooling fan for cooling air supply below the high voltage coil and cooling air supply at the vertical seat of the moon gate, thus forming a cold circulation, thereby ensuring the cooling effect of the transformer. The airflow blown down from the moon gate seat carries away heat through the air duct of the low voltage coil and the high voltage coil, forming dry hot air that blows between the lower clamps. At this time, the dry hot airflow can flow around the lower clamps, thereby carrying away the humid air around the lower clamps and flowing outward.

[0015] Furthermore, a fan filter cotton is inserted into the groove of the inner stepped ring seat, and an inner rod pressure ring that presses against the cooling fan is installed in the inner stepped ring seat above the fan filter cotton. An inner support rod that presses against the surface of the fan filter cotton is integrally formed in the ring body of the inner rod pressure ring, and a connecting rod is welded into the seat opening of the inner stepped ring seat below the fan filter cotton.

[0016] By adopting the above-mentioned preferred technical solution, the fan filter cotton can be clipped into the inner stepped ring seat and supported by the connecting rod. The inner rod pressure ring can be used to press the fan filter cotton into the inner stepped ring seat. At the same time, after the cooling fan is installed in conjunction with the crescent-shaped vertical seat at the inner stepped ring seat, the inner rod pressure ring can press the fan filter cotton to provide a filtration structure at the air inlet of the cooling fan, ensuring clean air intake of the cooling fan.

[0017] Furthermore, the outer side of the inner stepped ring seat is symmetrically welded with lugs, and the outer side of the heat dissipation fan above the inner stepped ring seat is integrally formed with a ring block. The outer side of the crescent-shaped vertical seat above the heat dissipation fan is symmetrically welded with a hole plate, and the hole plate, ring block and lugs are vertically locked together by bolts.

[0018] By adopting the above-mentioned preferred technical solution, after the cooling fan is pressed on top of the inner stepped ring seat, the crescent-shaped vertical seat can be stacked on top of it. Then, the bolts are screwed into the hole plate of the crescent-shaped vertical seat, the ring block of the cooling fan and the lug of the inner stepped ring seat to lock and install the three together.

[0019] Furthermore, the seat body of the lunar vent vertical base is formed by welding the lunar arc cover and the lunar arc vertical tube together, and the lunar arc cover blocks the upper half of the air vent of the cooling fan extending from the high voltage coil, and the top tube cavity of the lunar arc vertical tube is connected to the side seat opening of the lunar vent base.

[0020] By adopting the above-mentioned preferred technical solution, the lunar arch vertical seat obtains airflow by covering half of the air outlet of the cooling fan with a lunar arc, and at the same time, the lunar arc vertical pipe is connected to the lunar arc mouth seat for air supply.

[0021] Furthermore, the surface of the crescent-shaped groove plate inside the crescent-shaped opening seat is provided with arc-shaped air grooves for downward airflow, and the lower plate of the crescent-shaped groove plate is welded with a bent plate through a strip. The bent plate and the crescent-shaped opening seat are provided with mounting holes for screw bolts.

[0022] By adopting the above-mentioned preferred technical solution, the wind inside the crescent-shaped slot can be blown down into the air ducts of the low-voltage coil and the high-voltage coil along the arc-shaped air duct of the crescent-shaped slot plate to carry away heat. The bent plate forms a support point after being welded to the bottom of the crescent-shaped slot plate, so that the bent plate can support the crescent-shaped slot plate after being bolted to the crescent-shaped slot plate.

[0023] Furthermore, the outer side of the lunar arc vertical tube of the lunar arc vertical seat below the lunar arc seat is provided with insertion welding grooves, and flat tube fins are inserted and welded at the insertion welding grooves.

[0024] By adopting the above-mentioned preferred technical solution, after the flat tube fins are inserted into the moon arc socket along the welding groove and welded, the transfer arc box can be welded in, so that dry air conditioning cold air can enter the flat tube fins to form a cold source for cooling.

[0025] Furthermore, the low-voltage coil and high-voltage coil below the lunar arc seat are provided with air ducts for air passage along the coil axis, and four sets of cooling fan bodies are symmetrically installed in the U-shaped pair plate of the lower clamping piece below the two sets of stacked coil bodies of the high-voltage coil. A cold circulation mechanism is installed at the two sets of cooling fan bodies on one side of the lower clamping piece.

[0026] By adopting the above-mentioned preferred technical solution, the air ducts arranged along the coil axis of the low-voltage coil and the high-voltage coil can be smoothly cooled by airflow. The two sets of U-shaped plates of the lower clamp have four sets of cooling fans that can provide four upward airflow positions. Furthermore, the two sets of cooling fans can obtain a cold source for cooling through a cold circulation mechanism and then perform downward airflow cooling on the sides of the low-voltage coil and the high-voltage coil.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention achieves airflow-through heat dissipation by setting air ducts along the coil axis at the low-voltage and high-voltage coils of the dry-type transformer and installing four sets of air supply mechanisms at the lower clamp to precisely direct airflow to the bottom of the high-voltage coil. Two of the air supply mechanisms are equipped with a cold circulation mechanism, which introduces dry cold air from the factory, forms a cold source through flat tube fins, and performs airflow cooling in the vertical seat of the moon mouth. After cooling, the air is blown from top to bottom at the coil to remove heat, thus forming a bottom-supply and top-return air-cooling cycle, ensuring effective heat dissipation of the dry-type transformer and avoiding its vicious cycle of overheating.

[0029] Furthermore, the dry cold air introduced by the cold circulation mechanism and the heat dissipation airflow form a downward airflow. After passing through the coil air duct, the downward airflow forms dry hot air, which can actively disperse the humid air around the lower clamp and reduce the moisture intrusion of the transformer. The inner stepped coil seat has a built-in fan filter cotton, which can filter the impurities in the incoming air to avoid insulation pollution, and also help block moisture from directly entering the heat dissipation fan, effectively solving the moisture corrosion risk of transformers when induced ventilation for heat dissipation in humid areas.

[0030] Meanwhile, the cooling fan of the air supply mechanism is compatible with the temperature control system of the existing dry-type transformer cooling air supply. The cooling fan can be started and stopped in conjunction with the temperature probe, which can be easily adapted to the heat dissipation structure of the existing transformer for linkage control of heat dissipation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0032] Figure 2This is a schematic diagram showing the disassembled air supply mechanism and lower clamp of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0033] Figure 3 This is a schematic diagram showing the air supply mechanism and cooling circulation mechanism of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0034] Figure 4 This is an exploded view of the air supply mechanism of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0035] Figure 5 This is an exploded view of the cold circulation mechanism of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0036] Figure 6 This is a schematic diagram of the vertical support structure of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0037] Figure 7 This is a cross-sectional view of the flat tube fins and the transfer arc box of a single-phase 1000 Hz dry-type transformer according to the present invention.

[0038] In the diagram: 1. Transformer core; 2. Upper clamp; 3. Lower clamp; 4. High-voltage coil; 5. Low-voltage coil; 6. Air supply mechanism; 7. Cooling circulation mechanism; 8. Inner stepped coil seat; 9. Fan filter cotton; 10. Inner rod pressure ring; 11. Connecting rod; 12. Cooling fan; 13. Connecting lug; 14. L-shaped support plate; 15. Crescent-shaped vertical seat; 16. Hole connecting plate; 17. Crescent-shaped seat; 18. Crescent-shaped groove plate; 19. Bend connecting plate; 20. Insert welding groove; 21. Flat tube fin; 22. Transfer arc box; 23. Connecting solenoid; 24. Outgoing pipe; 25. C-shaped connecting pipe; 26. Fan-shaped expansion box. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0040] like Figure 1-7As shown, a single-phase 1000 Hz dry-type transformer includes a transformer core 1, an upper clamp 2, and a lower clamp 3. The upper and lower ends of the transformer core 1 are locked together with the upper clamp 2 and the lower clamp 3. A high-voltage coil 4 and a low-voltage coil 5 are vertically stacked from bottom to top at the vertical core of the transformer core 1. The transformer core 1 also includes an air supply mechanism 6 and a cooling circulation mechanism 7. The air supply mechanism 6 is symmetrically installed in the U-shaped slot of the lower clamp 3 to blow air upwards to cool the high-voltage coil 4 and the low-voltage coil 5. The cooling fan 12 of the air supply mechanism 6 supplies air upwards below and outside the high-voltage coil 4. The cooling fan 12 extends out of the shell surface of the high-voltage coil 4 and is equipped with a cooling circulation mechanism 7 to direct the airflow to the top of the low-voltage coil 5 for side and surface cooling. The cooling circulation mechanism 7 has flat tube fins 21 for introducing a cold source for air cooling inserted into the vertical seat 15 of the cooling circulation mechanism 7 for airflow.

[0041] Preferably, the air supply mechanism 6 includes an inner stepped ring seat 8, a cooling fan 12, and an L-shaped support plate 14. The cooling fan 12 is bolted to the upper part of the seat of the inner stepped ring seat 8, and an L-shaped support plate 14 is welded to one side of the seat of the inner stepped ring seat 8. The L-shaped support plate 14 is bolted to the groove of the lower clamp 3, and the air outlet of the cooling fan 12 faces the lower ring of the high-voltage coil 4.

[0042] By adopting the above-mentioned preferred technical solution, the inner stepped ring seat 8 can be installed in the groove of the lower clamp 3 with the L-shaped support plate 14 and bolts. Then, the cooling fan 12 can blow air upwards at the inner stepped ring seat 8 with the help of bolts, so that the air force carries away the heat upwards through the high voltage coil 4 and the low voltage coil 5.

[0043] Preferably, a cooling circulation mechanism 7 is installed above the housing of the cooling fan 12, and the cooling circulation mechanism 7 includes a crescent-shaped vertical seat 15, a crescent-shaped arc seat 17, a crescent-shaped arc groove plate 18, a bending plate 19, a flat tube fin 21, a transfer arc box 22, an inlet screw pipe 23, an outlet pipe 24, and a C-shaped connecting pipe 25. The crescent-shaped vertical seat 15 for distributing cooling air is installed above the base of the cooling fan 12, and a crescent-shaped arc seat 17 is integrally formed on one side of the top of the crescent-shaped vertical seat 15. The crescent-shaped vertical seat 15 and the crescent-shaped arc seat 17 communicate with each other, and a crescent-shaped arc groove plate 18 is fitted into the lower base of the crescent-shaped arc seat 17 facing the low-voltage coil 5. A bend plate 19 is welded to the outer side of the plate body of 18, and the bend plate 19 is locked to the outer side of the seat body of the crescent-shaped mouth seat 17 by bolts. A flat tube fin 21 is inserted and welded into the vertical seat body of the crescent-shaped mouth seat 15, and a transfer arc box 22 is welded to the outer tube opening of the flat tube fin 21. The transfer arc box 22 is symmetrically welded with an inlet screw pipe 23 for receiving cold air from the factory air conditioner and an outlet pipe 24 for discharging cold air. A C-shaped connecting pipe 25 is screwed into the opening of the outlet pipe 24. A fan-shaped expansion box 26 facing the lower part of the inner stepped ring seat 8 is screwed onto the opening of the C-shaped connecting pipe 25 away from the opening of the outlet pipe 24.

[0044] By adopting the above-mentioned preferred technical solution, after the crescent-shaped vertical seat 15 is installed above the cooling fan 12, the crescent-shaped vertical seat 15 can guide the air blown from the cooling fan 12 upwards to the crescent-shaped arc seat 17. After the crescent-shaped arc groove plate 18 and the elbow plate 19 are bolted together and installed below the crescent-shaped arc seat 17, the air in the crescent-shaped arc seat 17 can be blown downwards from the crescent-shaped arc groove plate 18 along the air duct of the low-voltage coil 5 and the high-voltage coil 4 to remove heat. Then, the connecting screw pipe 23 on the upper side of the transfer arc box 22 can be connected to the external pipe under the guidance of professional pipe construction personnel. The external pipe can be installed from the area where the transformer is located along the wall to the vicinity of the air conditioner outlet. A horn-shaped hood is set at the end of the external pipe to cover the air conditioner outlet and receive the air conditioner's cold air, thereby drawing the dry cold air from the factory air conditioner into the transfer arc box 22 along the pipe. After the cold air enters the transfer arc box 22, it can be carried out through the flat pipe. The fins 21 provide a cold source, which allows the vertical support 15 to contain a cold source that can cool the rising airflow. The airflow in the vertical support 15 has a good cooling effect, which allows the airflow blowing downward from the low-voltage coil 5 and the high-voltage coil 4 to effectively remove heat and cool them. Then, the airflow in the transfer arc box 22 can be connected to the fan-shaped expansion box 26 through the outlet pipe 24 via the C-shaped connecting pipe 25 and discharged below the environment where the transformer is located. The airflow can be drawn upward by the cooling fan 12 for cooling air supply below the high-voltage coil 4 and cooling air supply at the vertical support 15, thus forming a cold circulation and ensuring the cooling effect of the transformer. The airflow blowing downward from the arc support 17 carries away heat through the air duct of the low-voltage coil 5 and the high-voltage coil 4 and forms dry hot air that blows between the lower clamps 3. At this time, the dry hot airflow can flow around the lower clamps 3, thereby carrying away the humid air around the lower clamps 3 and flowing outward.

[0045] Preferably, a fan filter cotton 9 is inserted into the groove of the inner stepped ring seat 8, and an inner rod pressure ring 10 is installed in the inner stepped ring seat 8 above the fan filter cotton 9, pressing down on the cooling fan 12. An inner support rod is integrally formed in the inner rod pressure ring 10, pressing down on the surface of the fan filter cotton 9, and a connecting rod 11 is welded into the seat opening of the inner stepped ring seat 8 below the fan filter cotton 9.

[0046] By adopting the above-mentioned preferred technical solution, the fan filter cotton 9 can be inserted into the inner stepped ring seat 8 and supported by the connecting rod 11. The inner rod pressure ring 10 can be used to press the fan filter cotton 9 into the inner stepped ring seat 8. At the same time, after the cooling fan 12 is installed in conjunction with the crescent-shaped vertical seat 15 at the inner stepped ring seat 8, the inner rod pressure ring 10 can press the fan filter cotton 9 to provide a filtration structure at the air inlet of the cooling fan 12, ensuring clean air intake of the cooling fan 12.

[0047] Preferably, the outer side of the inner stepped ring seat 8 is symmetrically welded with lugs 13, and the outer side of the heat dissipation fan 12 above the inner stepped ring seat 8 is integrally formed with a ring block. The outer side of the crescent-shaped vertical seat 15 above the heat dissipation fan 12 is symmetrically welded with a hole plate 16, and the hole plate 16, the ring block and the lugs 13 are vertically locked by bolts.

[0048] By adopting the above-mentioned preferred technical solution, after the cooling fan 12 is pressed on top of the inner stepped ring seat 8, the crescent-shaped vertical seat 15 can be stacked on top of it. Then, the bolts are screwed into the hole plate 16 of the crescent-shaped vertical seat 15, the ring block of the cooling fan 12 and the lug 13 of the inner stepped ring seat 8 to lock and install the three together.

[0049] Preferably, the seat body of the lunar arch vertical seat 15 is formed by welding the lunar arc cover and the lunar arc vertical tube together, and the lunar arc cover covers the upper half of the air outlet of the cooling fan 12 extending from the high voltage coil 4, and the top tube cavity of the lunar arc vertical tube is connected to the side seat opening of the lunar arch seat 17.

[0050] By adopting the above-mentioned preferred technical solution, the crescent-shaped vertical seat 15 is positioned above half of the air vent of the cooling fan 12 to obtain airflow, while the crescent-shaped vertical pipe is connected to the crescent-shaped air vent 17 for air supply.

[0051] Preferably, the surface of the crescent-shaped groove plate 18 inside the crescent-shaped groove plate 17 is provided with arc-shaped air grooves for downward airflow, and the lower plate of the crescent-shaped groove plate 18 is welded with a bending plate 19 through a strip. The bending plate 19 and the crescent-shaped groove plate 17 are provided with mounting holes for screw bolts.

[0052] By adopting the above-mentioned preferred technical solution, the wind in the crescent-shaped port seat 17 can blow down along the arc-shaped wind channel of the crescent-shaped slot plate 18 into the air duct of the low-voltage coil 5 and the high-voltage coil 4 to carry away heat. The bent plate 19 forms a support point after being welded to the crescent-shaped slot plate 18 with strips, so that the bent plate 19 can support the crescent-shaped slot plate 18 after being bolted to the crescent-shaped port seat 17.

[0053] Preferably, the outer side of the crescent vertical tube of the crescent vertical seat 15 below the crescent arch seat 17 is provided with a welding groove 20, and a flat tube fin 21 is inserted and welded at the welding groove 20.

[0054] By adopting the above-mentioned preferred technical solution, after the flat tube fin 21 is inserted into the moon arc seat 17 along the insertion welding groove 20 and welded, the transfer arc box 22 can be welded thereafter, so that dry air conditioning cold air can enter the flat tube fin 21 to form a cold source for cooling.

[0055] Preferably, the low-voltage coil 5 and the high-voltage coil 4 below the lunar arc seat 17 are provided with air ducts for air passage along the coil axis, and four sets of cooling fan 12 bodies are symmetrically installed in the U-shaped pair plate of the lower clamp 3 below the two sets of stacked coil bodies of the high-voltage coil 4. A cold circulation mechanism 7 is installed at the two sets of cooling fan 12 bodies on one side of the lower clamp 3.

[0056] By adopting the above-mentioned preferred technical solution, the air ducts arranged along the coil axis of the low-voltage coil 5 and the high-voltage coil 4 can be smoothly cooled by airflow. The two sets of U-shaped plates of the lower clamp 3 have four sets of cooling fans 12 that can provide four points of upward airflow. Preferably, the two sets of cooling fans 12 can obtain cold source cooling through the cold circulation mechanism 7 and then perform downward airflow cooling on the sides of the low-voltage coil 5 and the high-voltage coil 4.

[0057] It should be noted that the present invention is a single-phase 1000 Hz dry-type transformer. The present invention provides air ducts along the coil axis at the low-voltage coil 5 and the high-voltage coil 4, and symmetrically installs four sets of air supply mechanisms 6 at the two sets of U-shaped plates of the lower clamp 3, and configures a cold circulation mechanism 7 at two of the sets of air supply mechanisms 6.

[0058] During installation, the L-shaped support plate 14 of the air supply mechanism 6 is bolted into the U-shaped groove of the lower clamp 3. Then, the fan filter cotton 9 is placed into the inner stepped ring seat 8 on one side of the L-shaped support plate 14 and supported by the connecting rod 11. At the same time, the inner rod pressure ring 10 is inserted into the inner stepped ring seat 8 to press the fan filter cotton 9. Then, the cooling fan 12 can be pressed on top of the inner stepped ring seat 8 and the inner rod pressure ring 10. At the same time, the crescent-shaped cover of the crescent-shaped vertical seat 15 is pressed on top of the cooling fan 12. The crescent-shaped port seat 17 above the crescent-shaped port seat 15 enters the lower part of the upper clamp 2 and covers the low-voltage coil 5. The crescent-shaped slot plate 18 can be pre-inserted into the lower part of the crescent-shaped port seat 17. At the same time, the elbow plate 19 matched with the crescent-shaped slot plate 18 is locked at the crescent-shaped port seat 17 with bolts to provide support. Then, the bolts are screwed into the hole plate 16 of the crescent-shaped port seat 15, the ring block of the cooling fan 12 and the lug 13 of the inner stepped ring seat 8 to lock and install the three together.

[0059] Before installing the moon mouth vertical seat 15, the C-shaped connecting pipe 25 can be pre-connected to the bottom of the transfer arc box 22. After the moon mouth vertical seat 15 is installed, the fan-shaped expansion box 26 can be pre-connected to the end of the C-shaped connecting pipe 25. Then, the access screw pipe 23 on the upper side of the transfer arc box 22 is connected to the external pipe under the guidance of professional pipe construction personnel. The external pipe can be installed from the area where the transformer is located along the wall to the vicinity of the air conditioner outlet of the factory. A horn-shaped hood is set at the end of the external pipe to cover the air conditioner outlet and receive the air conditioner's cold air. The external pipe can also be equipped with a bracket and supported and installed according to the existing indoor pipe hoisting method, so as to ensure that the external pipe can draw the dry cold air of the factory's air conditioner into the transfer arc box 22 along the pipe and the access screw pipe 23.

[0060] Temperature probes of a temperature controller can be installed at the low-voltage coil 5 of the transformer according to the heat dissipation control requirements of the existing transformer. The cooling fan 12 is connected to the heat dissipation temperature controller of the existing transformer for power control. When the temperature at the low-voltage coil 5 is not high, the dry cold air from the factory air conditioner enters the intermediate arc box 22 along the pipe. The cold air in the intermediate arc box 22 enters the flat tube fin 21 along the cavity, so that the heat-conducting material of the flat tube fin 21 can be effectively cooled, thereby forming a cold source of wind cooling in the moon mouth vertical seat 15. Then, the airflow in the intermediate arc box 22 can be discharged after connecting to the fan-shaped expansion box 26 through the outlet pipe 24 via the C-shaped connecting pipe 25. The airflow is lower than the environment where the transformer is located. The airflow can reduce the temperature of the transformer near the lower clamp 3 for inefficient heat dissipation. When the temperature probe at the low-voltage coil 5 detects that the temperature is too high, the cooling fan 12 is turned on.

[0061] After the cooling fan 12 draws the dry, cool air discharged from the fan nozzle expansion box 26, it can blow it upwards. Half of the air outlet of the cooling fan 12 can directly blow air from below the high-voltage coil 4 to the low-voltage coil 5, while the other half blows air into the moon-shaped vertical seat 15. The air below the high-voltage coil 4 flows upwards through the air duct of the low-voltage coil 5 and is then discharged upwards, carrying away some heat. The airflow inside the moon-shaped vertical seat 15 is cooled by the cold source at the flat tube fins 21, and then enters the moon-shaped arc seat 17, flowing downwards along the moon-shaped arc groove plate 18 to both sides of the low-voltage coil 5, thus making the airflow... The airflow is blown into the space between the lower clamp 3 through the air duct between the low-voltage coil 5 and the high-voltage coil, thus forming a wind-cooled circulation to cool the transformer and ensure the cooling effect of the transformer. The airflow blown down from the moon arc seat 17 carries away the heat through the air duct between the low-voltage coil 5 and the high-voltage coil 4 and forms dry hot air that is blown between the lower clamp 3. At this time, the dry hot airflow can flow around the lower clamp 3, thereby carrying away the humid air around the lower clamp 3 and flowing it outward. After the temperature at the transformer drops and is detected by the temperature probe, the cooling fan 12 can stop supplying air.

[0062] The air supply mechanism 6 and the cold circulation mechanism 7 are close to the transformer and can be insulated according to commercially available insulation technology. However, the high-voltage coil 4 and the low-voltage coil 5 of the transformer of this invention both adopt a cylindrical foil coil structure. The high-voltage coil 4 adopts a four-section cylindrical structure to reduce the interlayer field strength of each section of the coil.

[0063] It should be noted that the present invention is a single-phase 1000 Hz dry-type transformer. All components in the present invention are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A single-phase 1000 Hz dry-type transformer, comprising a transformer core (1), an upper clamp (2), and a lower clamp (3), wherein the upper clamp (2) and the lower clamp (3) are locked and installed at the upper and lower ends of the transformer core (1), and a high-voltage coil (4) and a low-voltage coil (5) are vertically stacked from bottom to top at the vertical core of the transformer core (1), characterized in that: It also includes an air supply mechanism (6) and a cold circulation mechanism (7). The U-shaped plate groove of the lower clamp (3) is symmetrically equipped with an air supply mechanism (6) for blowing air upward to cool the high-voltage coil (4) and the low-voltage coil (5). The cooling fan (12) of the air supply mechanism (6) supplies air upward below and outside the high-voltage coil (4). The cooling fan (12) extends out of the housing surface of the high-voltage coil (4) and is equipped with a cold circulation mechanism (7) for blowing air downward to the side and surface of the low-voltage coil (5). The vertical seat (15) of the cold circulation mechanism (7) for drawing air is fitted with a flat tube fin (21) for introducing a cold source for air cooling. The air supply mechanism (6) includes an inner stepped ring seat (8), a cooling fan (12) and an L-shaped support plate (14). The cooling fan (12) is bolted to the top of the seat of the inner stepped ring seat (8), and an L-shaped support plate (14) is welded to one side of the seat of the inner stepped ring seat (8). The L-shaped support plate (14) is bolted to the groove of the lower clamp (3). The air outlet of the cooling fan (12) faces the lower ring of the high-voltage coil (4). A cooling circulation mechanism (7) is installed above the housing of the cooling fan (12), and the cooling circulation mechanism (7) includes a crescent-shaped vertical seat (15), a crescent-shaped arc seat (17), a crescent-shaped groove plate (18), a bend plate (19), a flat tube fin (21), a transfer arc box (22), an inlet screw pipe (23), an outlet pipe (24), and a C-shaped connecting pipe (25). A crescent-shaped vertical seat (15) for distributing cooling air is installed above the base of the cooling fan (12), and a crescent-shaped arc seat (17) is integrally formed on one side of the top of the base of the crescent-shaped vertical seat (15). The crescent-shaped vertical seat (15) and the crescent-shaped arc seat (17) are interconnected, and a crescent-shaped groove plate (18) is fitted into the lower base of the crescent-shaped arc seat (17) facing the low-voltage coil (5). A bent plate (19) is welded to the outer side of the plate (18), and the bent plate (19) is locked to the outer side of the seat of the moon arc seat (17) by bolts. A flat tube fin (21) is inserted and welded into the vertical seat of the moon arc seat (15), and a transfer arc box (22) is welded to the outer tube opening of the flat tube fin (21). The transfer arc box (22) is symmetrically welded with an inlet screw pipe (23) for receiving cold air from the factory air conditioner and an outlet pipe (24) for discharging cold air. A C-shaped connecting pipe (25) is screwed into the opening of the outlet pipe (24). A fan-shaped expansion box (26) facing the inner step ring seat (8) is screwed onto the opening of the C-shaped connecting pipe (25) away from the opening of the outlet pipe (24).

2. A single-phase 1000 Hz dry-type transformer according to claim 1, characterized in that: The inner stepped ring seat (8) has a fan filter cotton (9) inserted into its seat groove, and an inner rod pressure ring (10) is installed in the inner stepped ring seat (8) above the fan filter cotton (9) and pressed down on the cooling fan (12). An inner support rod is integrally formed in the inner rod pressure ring (10) and pressed on the surface of the fan filter cotton (9). A connecting rod (11) is welded into the seat opening of the inner stepped ring seat (8) below the fan filter cotton (9).

3. A single-phase 1000 Hz dry-type transformer according to claim 2, characterized in that: The inner stepped ring seat (8) has symmetrically welded lugs (13) on the outer side of the seat body, and the cooling fan (12) above the inner stepped ring seat (8) has an integrally formed ring block on the outer side. The venting vertical seat (15) above the cooling fan (12) has symmetrically welded perforated plates (16) on the outer side, and the perforated plates (16), ring blocks and lugs (13) are vertically locked by bolts.

4. A single-phase 1000 Hz dry-type transformer according to claim 3, characterized in that: The seat of the lunar vent vertical base (15) is formed by welding the lunar arc cover and the lunar arc vertical tube together. The lunar arc cover is located above the half of the air outlet of the cooling fan (12) extending out of the high voltage coil (4). The top tube cavity of the lunar arc vertical tube is connected to the side seat of the lunar vent base (17).

5. A single-phase 1000 Hz dry-type transformer according to claim 4, characterized in that: The surface of the crescent-shaped groove plate (18) inside the crescent-shaped groove plate (17) is provided with arc-shaped air grooves for downward airflow, and the lower plate of the crescent-shaped groove plate (18) is welded with a bending plate (19) through a strip plate. The bending plate (19) and the crescent-shaped groove plate (17) are provided with mounting holes for screw bolts.

6. A single-phase 1000 Hz dry-type transformer according to claim 5, characterized in that: The outer side of the lunar arc vertical tube of the lunar arc vertical seat (15) below the lunar arc seat (17) is provided with insertion welding grooves (20), and flat tube fins (21) are inserted and welded at the insertion welding grooves (20).

7. A single-phase 1000 Hz dry-type transformer according to claim 6, characterized in that: The low-voltage coil (5) and high-voltage coil (4) below the lunar arc seat (17) are provided with air ducts for air passage along the coil axis. The four sets of cooling fans (12) are symmetrically installed in the U-shaped plate of the lower clamp (3) below the two sets of stacked coil bodies of the high-voltage coil (4). The two sets of cooling fans (12) on one side of the lower clamp (3) are equipped with a cold circulation mechanism (7).

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