Air-cooled dry-type transformer

Abstract

The utility model relates to a kind of air-cooled dry-type transformer, including transformer box, the inside fixed mounting of transformer box is transformer body, the both sides of transformer box are respectively provided with the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of the air inlet tube sleeve of

Description

Technical Field

[0001] This utility model relates to dry-type transformers, specifically an air-cooled dry-type transformer. Background Technology

[0002] Air-cooled dry-type transformers are key equipment in power distribution systems. Their heat dissipation performance directly determines the equipment's operating efficiency, load capacity, and service life. Currently, the mainstream method for heat dissipation of dry-type transformers is forced air cooling. Traditional air cooling usually involves using a fan to directly blow heat off the transformer windings. This method has drawbacks: First, the airflow generated by the fan is concentrated and unidirectional, leading to excessive cooling on the windward side of the windings. Meanwhile, the leeward side, the inner side of the windings, and areas with complex structures become heat dissipation dead zones because the airflow cannot reach them. This can easily cause local overheating, accelerate the aging of insulation materials, and pose safety hazards.

[0003] To address the issue of heat dissipation uniformity, existing technologies have introduced improved solutions by setting up air ducts around the transformer. However, these duct structures are often complex and fail to fundamentally solve the problem of uneven airflow distribution within the duct. Simple duct designs may result in most airflow still exiting from the outlet near the fan, while the airflow from the outlet far from the fan is weak, failing to achieve truly uniform air delivery. On the other hand, traditional cooling methods often rely on "blowing," i.e., forcing cooling air into the transformer body in the forward direction. The exhaust of hot air often relies on natural upward movement, which is inefficient and easily leads to the formation of hot air stagnation and eddies inside the transformer, affecting the overall heat dissipation efficiency. Therefore, we propose an air-cooled dry-type transformer to solve the problems mentioned in the background technology. Utility Model Content

[0004] The purpose of this invention is to provide an air-cooled dry-type transformer that can not only deliver cooling airflow evenly and gently to all heat-generating surfaces of the transformer to eliminate local hot spots, but also efficiently force hot air out, thereby significantly improving the overall heat dissipation efficiency and operational reliability of the dry-type transformer, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A type of air-cooled dry-type transformer includes a transformer housing, a transformer body fixedly installed inside the transformer housing, and air inlet sleeves penetrating the transformer housing on both sides of the transformer housing. A driven shaft is rotatably installed on the inner side of the air inlet sleeve, and an air intake fan is installed on the driven shaft. Pressure equalization cavities communicating with the air inlet sleeves are respectively provided on the inner walls of both sides of the transformer body, and air outlet holes are opened on the pressure equalization cavities. The top of the transformer housing is provided with a negative pressure suction mechanism. The negative pressure suction mechanism includes an exhaust sleeve that is fixed to the top of the transformer housing and penetrates the transformer housing shell. The inner side of the exhaust sleeve is rotatably mounted with a drive shaft. An exhaust fan is provided on the drive shaft. The drive shaft and the driven shaft are connected by a linkage mechanism. When the drive shaft rotates, it will drive the driven shaft to rotate.

[0006] As described above, a type of air-cooled dry-type transformer has multiple air outlets, which are evenly distributed on one side wall of the equalizing cavity near the transformer body.

[0007] As described above, a type of air-cooled dry-type transformer is provided with a drive motor on the transformer housing. The output end of the drive motor is connected to the drive shaft through a coupling to drive the drive shaft to rotate.

[0008] As described above, a type of air-cooled dry-type transformer includes a linkage mechanism comprising two drive shafts rotatably mounted on the transformer housing. The two drive shafts are connected to the drive shaft via a first transmission mechanism. When the drive shaft rotates, it drives the two drive shafts to rotate synchronously. The two drive shafts are respectively connected to the driven shafts on both sides of the transformer housing via a second transmission mechanism. When the drive shafts rotate, they drive the driven shafts to rotate synchronously.

[0009] As described above, an air-cooled dry-type transformer has the following characteristics: the first transmission mechanism includes a driving bevel gear fixed on the drive shaft and a driven bevel gear fixed on the transmission shaft, wherein the driven bevel gear meshes with the driving bevel gear.

[0010] As described above, in an air-cooled dry-type transformer: the second transmission mechanism includes a driving pulley fixed on a transmission shaft and a driven pulley fixed on a driven shaft, wherein the driving pulley and the driven pulley are driven by a transmission belt.

[0011] As described above, an air-cooled dry-type transformer has an inspection door hinged to the front of the transformer housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a pressure equalization chamber with multiple evenly distributed air outlets on both sides of the transformer housing. This chamber allows cold air to enter and its dynamic pressure to be converted into static pressure, achieving pressure equilibrium. Finally, the air is blown at a uniform speed through numerous outlets onto the entire side of the transformer body. This surface-type air supply mode replaces the traditional point-to-point direct blowing, completely solving the problem of heat dissipation dead zones caused by uneven airflow distribution, avoiding localized overheating, and significantly improving the operational reliability and lifespan of the equipment.

[0013] In addition, this utility model combines the air supply mechanism on the side wall with the negative pressure suction mechanism on the top through a linkage mechanism to create a forced cooling airflow that runs from bottom to top and through the entire internal space of the transformer tank. The side pressure equalization air supply ensures uniform coverage of cold air, while the top negative pressure suction efficiently forces hot air out, avoiding the stagnation and eddies of hot air inside the transformer tank, thereby significantly improving the overall heat dissipation efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an air-cooled dry-type transformer.

[0015] Figure 2 This is a schematic diagram of the structure of an air-cooled dry-type transformer when the transformer body is not installed.

[0016] Figure 3 For a type of air-cooled dry-type transformer Figure 2 A schematic diagram of the decomposed part of the structure.

[0017] Figure 4 For a type of air-cooled dry-type transformer Figure 3 A schematic diagram of the decomposed part of the structure.

[0018] Figure 5 For a type of air-cooled dry-type transformer Figure 3 A schematic diagram of the decomposed part of the structure.

[0019] In the diagram: 1. Transformer housing; 2. Transformer body; 3. Inlet sleeve; 4. Driven shaft; 5. Inlet fan; 6. Equalizing chamber; 7. Outlet vent; 8. Exhaust sleeve; 9. Drive shaft; 10. Exhaust fan; 11. Drive motor; 12. Transmission shaft; 13. Driven bevel gear; 14. Driven bevel gear; 15. Drive pulley; 16. Driven pulley; 17. Transmission belt; 18. Inspection door. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-5As an embodiment of this utility model, an air-cooled dry-type transformer includes a transformer housing 1, a transformer body 2 fixedly installed inside the transformer housing 1, and air inlet sleeves 3 that penetrate the housing of the transformer housing 1 on both sides of the transformer housing 1. A driven shaft 4 is rotatably installed on the inner side of the air inlet sleeve 3, and an air inlet fan 5 is installed on the driven shaft 4. A pressure equalization cavity 6 communicating with the air inlet sleeve 3 is provided on the inner walls of both sides of the transformer body 2, and an air outlet 7 is opened on the pressure equalization cavity 6.

[0022] The top of the transformer housing 1 is equipped with a negative pressure suction mechanism. The negative pressure suction mechanism includes an exhaust sleeve 8 that is fixed to the top of the transformer housing 1 and passes through the housing of the transformer housing 1. The inner side of the exhaust sleeve 8 is rotatably mounted with a drive shaft 9. An exhaust fan 10 is installed on the drive shaft 9. The drive shaft 9 and the driven shaft 4 are connected by a linkage mechanism. When the drive shaft 9 rotates, it will drive the driven shaft 4 to rotate.

[0023] In this embodiment, during use, the transformer body 2 is installed inside the transformer housing 1. The driven shafts 4 on both sides of the transformer housing 1 are driven to rotate simultaneously, which drives the intake fan 5 to rotate. The rotation of the intake fan 5 generates a cold airflow that blows into the pressure equalization chamber 6, forming a pressure equalization chamber inside the pressure equalization chamber 6. After the cold airflow enters the pressure equalization chamber 6, the dynamic pressure is converted into static pressure, achieving pressure equalization. Finally, it is blown through a large number of air outlets 7 at a uniform wind speed to the entire side of the transformer body 2 for air cooling. The driven shaft 4 rotates synchronously with the drive shaft 9. When the driven shaft 4 rotates, the drive shaft 9 also rotates. The rotation of the drive shaft 9 drives the exhaust fan 10 to rotate. The rotation of the exhaust fan 10 creates a negative pressure at the top of the transformer housing 1, which draws heat from inside the transformer housing 1 and efficiently forces the hot air out of the transformer housing 1, avoiding the stagnation and eddies of hot air inside the transformer housing 1. This forms a smooth and efficient cooling airflow channel with uniform air intake from both sides and concentrated exhaust from the top.

[0024] As a further embodiment of this utility model, there are multiple air outlets 7, which are evenly distributed on one side wall of the pressure equalization cavity 6 near the transformer body 2.

[0025] In this embodiment, by setting multiple evenly distributed air outlets 7 on the pressure equalization chamber 6, the airflow that is concentratedly sent into the pressure equalization chamber 6 is dispersed into multiple fine and uniform airflows, ensuring that the cooling coverage area of ​​the transformer body 2 is maximized and there are no dead corners, fundamentally solving the problem of uneven cooling caused by the traditional direct blowing method.

[0026] As a further embodiment of this utility model, a drive motor 11 is provided on the transformer housing 1, and the output end of the drive motor 11 is connected to the drive shaft 9 through a coupling to drive the drive shaft 9 to rotate.

[0027] In this embodiment, the drive motor 11 is electrically connected to an external power source via a wire. Starting the drive motor 11 drives the drive shaft 9 to rotate. In addition, the drive motor 11 serves as a single power source for the entire device, simplifying the equipment structure.

[0028] As a further embodiment of this utility model, the linkage mechanism includes two drive shafts 12 rotatably mounted on the transformer housing 1. The two drive shafts 12 are connected to the drive shaft 9 through a first transmission mechanism. When the drive shaft 9 rotates, it will drive the two drive shafts 12 to rotate synchronously. The two drive shafts 12 are respectively connected to the driven shafts 4 on both sides of the transformer housing 1 through a second transmission mechanism. When the drive shafts 12 rotate, they will drive the driven shafts 4 to rotate synchronously.

[0029] In this embodiment, when the drive motor 11 drives the drive shaft 9 to rotate, the drive shaft 12 and the drive shaft 9 cooperate through a first transmission mechanism. When the drive shaft 9 rotates, it will drive the two drive shafts 12 to rotate synchronously. The two drive shafts 12 are respectively connected to the driven shafts 4 on both sides of the transformer housing 1 through a second transmission mechanism. When the drive shaft 12 rotates, it will drive the driven shafts 4 to rotate synchronously. This linkage mechanism transmits the power of the drive shaft 9 to the driven shafts 4 on both sides, ensuring that one motor can simultaneously drive the synchronous operation of the top exhaust and the two side air intake fans.

[0030] As a further embodiment of this utility model, the first transmission mechanism includes a driving bevel gear 14 fixed on the driving shaft 9 and a driven bevel gear 13 fixed on the transmission shaft 12, wherein the driven bevel gear 13 meshes with the driving bevel gear 14.

[0031] In this embodiment, when the drive shaft 9 rotates, it drives the drive bevel gear 14 to rotate. The driven bevel gear 13 meshes with the drive bevel gear 14 to drive the driven bevel gear 13 to rotate, thereby driving the transmission shaft 12 to rotate.

[0032] As a further embodiment of this utility model, the second transmission mechanism includes a driving pulley 15 fixed on the transmission shaft 12 and a driven pulley 16 fixed on the driven shaft 4, with the driving pulley 15 and the driven pulley 16 being driven by a transmission belt 17.

[0033] In this embodiment, when the drive shaft 12 rotates, it drives the drive pulley 15 to rotate. The drive pulley 15 and the driven pulley 16 are driven to rotate by the drive belt 17, thereby driving the driven shaft 4 to rotate.

[0034] As a further embodiment of this utility model, an inspection door 18 is installed on the front of the transformer housing 1 via a hinge.

[0035] In this embodiment, the inspection door 18 facilitates routine inspection, maintenance and cleaning of the inside of the transformer housing 1 by staff, thereby improving the maintainability and safety of the equipment.

[0036] In use, the drive motor 11 is started, which drives the drive shaft 9 and the exhaust fan 10 at the top to rotate. Through the meshing driven bevel gear 13 and drive bevel gear 14, the power is transmitted to the two drive shafts 12. The drive shafts 12 then transmit the power to the driven shafts 4 on both sides through the drive pulley 15, driven pulley 16 and drive belt 17, driving the intake fan 5 to rotate synchronously. The intake fan 5 blows cooling air into the equalizing chambers 6 on both sides. After being equalized, the airflow is evenly blown towards the transformer body 2 from multiple air outlets 7 for cooling. At the same time, the high-speed rotating exhaust fan 10 at the top creates a negative pressure inside the housing, continuously drawing hot air upward and expelling it. This creates a highly efficient and coordinated directional cooling airflow circulation inside the transformer housing 1, with even air intake from both sides and forced exhaust from the top, which significantly improves the uniformity and efficiency of heat dissipation.

[0037] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A wind-cooled dry-type transformer, comprising a transformer housing (1), wherein a transformer body (2) is fixedly installed inside the transformer housing (1), characterized in that, The transformer housing (1) is provided with air inlet sleeves (3) that penetrate the transformer housing (1) on both sides. A driven shaft (4) is rotatably installed on the inner side of the air inlet sleeve (3). An air inlet fan (5) is provided on the driven shaft (4). The inner walls of both sides of the transformer body (2) are provided with equalizing cavities (6) that communicate with the air inlet sleeves (3). An air outlet (7) is provided on the equalizing cavity (6). The top of the transformer housing (1) is provided with a negative pressure suction mechanism. The negative pressure suction mechanism includes an exhaust sleeve (8) that is fixed to the top of the transformer housing (1) and passes through the shell of the transformer housing (1). The inner side of the exhaust sleeve (8) is rotatably mounted with a drive shaft (9). An exhaust fan (10) is provided on the drive shaft (9). The drive shaft (9) and the driven shaft (4) are connected by a linkage mechanism. When the drive shaft (9) rotates, it will drive the driven shaft (4) to rotate.

2. The air-cooled dry-type transformer according to claim 1, characterized in that, The number of air outlets (7) is multiple, and the air outlets (7) are evenly opened on one side wall of the equalizing cavity (6) near the transformer body (2).

3. The air-cooled dry-type transformer according to claim 1, characterized in that, The transformer housing (1) is equipped with a drive motor (11), and the output end of the drive motor (11) is connected to the drive shaft (9) through a coupling to drive the drive shaft (9) to rotate.

4. The air-cooled dry-type transformer according to claim 1, characterized in that, The linkage mechanism includes two drive shafts (12) rotatably mounted on the transformer housing (1). The two drive shafts (12) are connected to the drive shaft (9) through a first transmission mechanism. When the drive shaft (9) rotates, it will drive the two drive shafts (12) to rotate synchronously. The two drive shafts (12) are respectively connected to the driven shafts (4) on both sides of the transformer housing (1) through a second transmission mechanism. When the drive shafts (12) rotate, they will drive the driven shafts (4) to rotate synchronously.

5. A wind-cooled dry-type transformer according to claim 4, characterized in that, The first transmission mechanism includes a driving bevel gear (14) fixed on the drive shaft (9) and a driven bevel gear (13) fixed on the transmission shaft (12), wherein the driven bevel gear (13) meshes with the driving bevel gear (14).

6. A wind-cooled dry-type transformer according to claim 4, characterized in that, The second transmission mechanism includes a driving pulley (15) fixed on the transmission shaft (12) and a driven pulley (16) fixed on the driven shaft (4), and the driving pulley (15) and the driven pulley (16) are driven by a transmission belt (17).

7. A wind-cooled dry-type transformer according to claim 1, characterized in that, The transformer housing (1) has an inspection door (18) installed on the front side via a hinge.

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