Cooling system for a dry-type transformer

Abstract

The application provides a cooling system of a dry-type transformer, and relates to the technical field of electrical equipment.The cooling system of the dry-type transformer comprises a fixing frame, an iron core and a winding, and further comprises: a cooling device installed on one side of the fixing frame and capable of cooling the winding; a wind deflector located in the fixing frame and in sliding connection with the fixing frame, the wind deflector being provided with a through hole through which the winding passes, a gap being formed between the through hole and the outer side of the winding, air passing through the gap being accelerated, so that the winding can be locally cooled; and a lifting assembly connected with the wind deflector and capable of driving the wind deflector to move and changing the cooling position of the winding; the winding is provided with a plurality of groups of two windings coaxially arranged, and a wind baffle is arranged between the two windings in the same group.The gap formed between the through hole on the wind deflector and the winding is used for cooling, and the lifting assembly is used for precise cooling, so that the ability of the transformer to precisely cool a region during operation is improved, and the stability of the transformer is ensured.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more particularly to a cooling system for a dry-type transformer. Background Technology

[0002] As a core piece of equipment in the power system, the stability of transformers directly affects the safety and efficiency of the entire power grid. Transformers include dry-type transformers, which have advantages such as high short-circuit resistance, low protection, high operating efficiency, small size, and low noise. They are widely used in substations, high-rise buildings, airports, and other places with high safety and environmental protection requirements.

[0003] With the widespread application of dry-type transformers, dry-type transformers are developing towards larger capacity and intelligence. At present, the mainstream single 24-pulse rectifier products are basically oil-immersed transformers, with only a few single 24-pulse dry-type rectifier transformers, but these are basically 10kV products, and there are basically no 35kV single 24-pulse rectifier dry-type transformers. A single 24-pulse rectifier product integrates four conventional 6-pulse transformers into one transformer, which reduces the overall cost and the installation footprint. Furthermore, through the low-voltage side four-split phase-shifting design, the transformer achieves the characteristics of low harmonic generation, high overload capacity, small footprint, and high integration.

[0004] However, due to the product's large capacity and overall size, and the high voltage level which significantly increases the insulation distance, the size has been further increased. The axial 4-split structure of a single 24-pulse rectifier dry-type transformer has affected the height, making the product reach the maximum size limit for transformer products. Including the dry-type transformer casing, the height has reached the transportable limit of 5 meters. Furthermore, the temperature rise design of each coil in the axial split transformer itself is a major challenge. The large harmonic rectifier load further exacerbates the difficulty in controlling the hot spot temperature of the coil windings. The cooling system with temperature rise control cannot effectively ensure the uniformity of heat dissipation of the transformer, and it cannot accurately cool down when local high temperatures are generated in the coil windings.

[0005] Therefore, in order to solve the above problems, the present invention proposes a cooling system for dry-type transformers, which aims to improve the comprehensiveness and accuracy of cooling system temperature reduction. Summary of the Invention

[0006] The purpose of this invention is to provide a cooling system for dry-type transformers, which aims to solve the problems of uneven and inaccurate cooling.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a cooling system for a dry-type transformer, comprising a fixing frame, an iron core disposed within the fixing frame, and a winding sleeved on the outer side of the iron core, and further comprising:

[0008] A cooling device, installed on one side of the fixed frame, is used to cool the windings.

[0009] A wind deflector is located inside the fixed frame and slidably connected thereto. The wind deflector has a through-hole for the winding to pass through. There is a gap between the through-hole and the outside of the winding, which can accelerate the air passing through it, thereby locally cooling the winding.

[0010] The lifting component, connected to the baffle plate, can drive the baffle plate to move and change the cooling position of the winding.

[0011] The winding is provided in multiple ways, and two windings arranged coaxially form a group, with a wind deflector between the two windings in the same group.

[0012] Preferably, two wind deflectors are provided along the longitudinal direction, located on the upper and lower sides of the wind deflector respectively, and each wind deflector is connected to a lifting assembly.

[0013] Preferably, the wind deflector is also provided with vents, and there are multiple vents to achieve uniform distribution of cooling gas.

[0014] Preferably, the wind deflector is further provided with a plurality of sliding members, which are slidably connected to the fixed frame.

[0015] Preferably, the cooling device is located on the outside of one side of the mounting frame and is connected to the mounting frame.

[0016] Preferably, the cooling device has an air inlet and an air outlet on the side near the winding, the air inlet being at a higher horizontal level than the baffle plate, and the air outlet being at a lower horizontal level than the baffle plate.

[0017] Preferably, the fixing frame is connected to a plurality of clamps, which are capable of clamping and fixing the iron core.

[0018] Preferably, multiple fans are provided on the outer side of the clamp located on the lower side of the winding, and the air outlets of the fans face the winding.

[0019] Preferably, the windshield is sleeved on the outside of the winding, and the windshield includes a fixed part and a movable part, and a connecting part is provided between the fixed part and the fixed frame; the fixed part and the movable part are slidably connected.

[0020] Preferably, the fixing member is provided with a moving component that can drive the moving component to move.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. This invention achieves cooling by utilizing the gap between the through-hole on the baffle plate and the winding, while simultaneously cooperating with the lifting assembly to achieve precise cooling. When the temperature sensor detects an abnormal temperature area, the lifting assembly moves the baffle plate to a designated position, allowing cold air to move rapidly through the gap between the baffle plate and the winding, thus cooling that area. This achieves precise cooling of the transformer winding, ensuring the stability of the transformer during operation.

[0023] 2. By precisely setting different vents on the wind deflector, this invention enables the airflow inside the transformer casing to cover the entire transformer, thereby improving the uniformity of heat dissipation.

[0024] 3. The present invention improves the cooling capacity of the winding by setting the moving parts and moving components in the wind deflector; when the internal temperature of the winding rises abnormally, the cooperation of the moving parts and moving components enhances the cooling capacity of the winding and improves the ability to fully cool down the winding after the internal temperature rises abnormally. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the internal gas flow of the present invention.

[0027] Figure 3 This is the present invention. Figure 2 Enlarged view of a portion of point A in the middle.

[0028] Figure 4 This is a schematic diagram showing the position of the wind deflector in this invention.

[0029] Figure 5 This is the present invention. Figure 4 Enlarged view of section B in the middle.

[0030] Figure 6 This is the present invention. Figure 4 Enlarged view of a section at point C.

[0031] Figure 7 This is a schematic diagram of the windshield in this invention.

[0032] Figure 8 This is a schematic diagram showing the position of the windshield in this invention.

[0033] Figure 9 This is the present invention. Figure 8 Enlarged view of a section at point D.

[0034] Figure label:

[0035] 1. Winding; 2. Iron core; 3. Fixing frame; 4. Cooling device; 5. Baffle plate; 6. Lifting assembly; 7. Baffle tube; 8. Moving assembly; 9. Clamp; 10. Fan; 11. Housing; 101. High voltage coil; 102. Low voltage coil; 103. Insulating cylinder; 104. Upper pad; 105. Middle pad; 106. Lower pad; 107. Positioning ring; 108. Baffle ring; 401. Air inlet; 402. Air outlet; 501. Sliding part; 502. Vent; 503. Through hole; 601. First gear; 602. First driving component; 603. First rack; 701. Fixing component; 702. Moving component; 703. Connecting component; 704. Guide surface; 801. Second gear; 802. Second driving component; 803. Second rack. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In this article, "winding 1" refers to a complete coil unit, including sub-components such as high-voltage coil 101, low-voltage coil 102, and insulating cylinder 103.

[0038] Example 1

[0039] To improve the cooling effect of dry-type transformers, such as Figures 1 to 9 As shown, the present invention proposes a cooling system for a dry-type transformer, including a fixing frame 3, an outer shell 11 on the outside of the fixing frame 3, and multiple support rods fixedly connected inside the fixing frame 3 for supporting internal components.

[0040] The fixing frame 3 contains an iron core 2, and a winding 1 is sleeved on the outside of the iron core 2. The iron core 2 includes multiple longitudinal iron core columns and two transverse iron yokes. The winding 1 is sleeved on the iron core columns. Multiple clamps 9 are connected inside the fixing frame 3. The clamps 9 are all located at the iron yoke of the iron core 2. The clamps 9 can clamp and fix the iron core 2.

[0041] It should be noted that the iron core 2 has a gap in the middle to form an axial air passage, which can quickly remove the heat generated inside the iron core 2 during the heat dissipation process. The clamp 9 includes a clamp and a shock absorber. The clamp is clamped at the iron yoke of the iron core 2, and the shock absorber is located between the iron core 2 and the clamp 9. The clamp can fix the iron core 2 by a long screw, and the shock absorber is used to reduce the axial vibration of the iron core 2 to ensure the normal operation of the iron core 2.

[0042] In this embodiment, the cooling system for the dry-type transformer further includes:

[0043] The cooling device 4 is installed on one side of the fixing frame 3 and can cool the winding 1. The cooling device 4 is located outside the fixing frame 3 and is connected to the fixing frame 3. The cooling device 4 and the outer casing 11 form a sealed environment. The gas inside the outer casing 11 circulates with the gas inside the cooling device 4 to dissipate heat from the transformer.

[0044] The cooling device 4 has an air inlet 401 and an air outlet 402 on the side facing the winding 1. The air inlet 401 is at a higher horizontal height than the baffle plate 5, and the air outlet 402 is at a lower horizontal height than the baffle plate 5.

[0045] It should be noted that the air inlet 401 of the cooling device 4 is located above the air outlet 402. The air inlet 401 is located in the upper half of the cooling device 4 near the fixed frame 3, and the air outlet 402 is located in the lower half. The air inlet 401 of the cooling device 4 is equipped with a fan, and multiple fans are arranged in the horizontal direction. The air inlet 401 can draw out the hot air inside the outer casing 11. The air outlet 402 of the cooling device 4 injects cooled cold air into the outer casing 11. The cooling device 4 also includes a part for cooling the air. This part of the cooler can include a water-cooled core, which cools the hot air and injects it into the bottom of the outer casing 11.

[0046] The cooling device 4 draws hot air into the interior of the cooling device 4 from the air inlet 401. After passing through the water-cooled core, the hot air is turned into cold air and injected into the bottom of the transformer casing 11 from the air outlet 402 at the bottom. Then, the cold air enters the transformer and moves upward to carry away the heat, ensuring the safe operation of the transformer.

[0047] In this embodiment, the baffle plate 5 is located inside the fixed frame 3, and the horizontal height of the baffle plate 5 is positioned between the air inlet end 401 and the air outlet end 402. The baffle plate 5 is provided with a through hole 503 for the winding 1 to pass through. There is a gap between the through hole 503 and the outside of the winding 1, which can accelerate the air passing through it, thereby locally cooling the winding 1.

[0048] It should be noted that the winding 1 passes through the through-hole 503 of the baffle 5, forming a gap between the winding 1 and the baffle 5. The cold air below the baffle 5 enters the area above the baffle 5 through this gap. According to the laws of fluid dynamics, the speed of the gas increases when passing through the gap. In the same amount of time, the winding 1 comes into contact with more cold air. Therefore, the winding 1 on the upper side of the baffle 5 will have a better cooling effect. Moreover, when the cold air passes through quickly, it cools the winding 1 without causing the temperature of the cold air to rise excessively due to prolonged contact with the winding 1, and will not affect the cooling effect of the winding 1 above.

[0049] The baffle plate 5 divides the internal space of the transformer casing 11 into two spaces: the upper part is the hot air zone and the lower part is the cold air zone. The baffle plate 5 separates the two spaces, and the cold air in the lower part must pass through the through-hole 503 to circulate upwards, ensuring the cooling air volume inside the transformer. The gas quickly passes through the gap to cool the winding 1 without excessively affecting the temperature of the cold air and without affecting the normal cooling of other parts.

[0050] In this embodiment, there are multiple windings 1. Two windings 1 arranged coaxially form a group. A wind deflector 7 is provided between the two windings 1 in the same group. The wind deflector 7 is coaxially sleeved on the outside of the winding 1.

[0051] It should be noted that the two windings 1 are arranged coaxially in the vertical direction. The two windings 1 arranged coaxially form a group. The vertical arrangement design can better dissipate heat and also reduce the footprint of the transformer, which can be used in a smaller space and increase the applicability of the equipment.

[0052] In this embodiment, winding 1 includes a low-voltage coil 102, which is sleeved on the outside of the core column of iron core 2. An insulating cylinder 103 is sleeved on the outside of the low-voltage coil 102, and a high-voltage coil 101 is sleeved on the outside of the insulating cylinder 103. A gap is provided between the low-voltage coil 102, the insulating cylinder 103, and the high-voltage coil 101. Each low-voltage coil 102 has a positioning ring 107 at both ends, which can separate and fix each low-voltage coil 102.

[0053] It should be noted that each winding 1 includes a set of high-voltage coils 101, a set of insulating cylinders 103, and two sets of low-voltage coils 102. The two sets of low-voltage coils 102 are vertically coaxially arranged and are both inside the same set of insulating cylinders 103. Each core column of the core 2 has two windings 1 coaxially arranged, forming four independent coils that are axially split. The high-voltage coils 101, insulating cylinders 103, and low-voltage coils 102 are coaxially arranged and there are gaps between them, so that the heat generated during the operation of the transformer can be dissipated more quickly, thereby improving the stability of the transformer operation.

[0054] A wind baffle ring 108 is provided at the lower end of the insulating cylinder 103. The high-voltage coil, low-voltage coil and iron core 2 are the heat-generating elements and the main heat dissipation objects. The space between the insulating cylinders 103 is large, and the passage of cold air will cause airflow loss. Therefore, the wind baffle ring 108 at the lower end of the insulating cylinder 103 is added so that cold air can only flow from the inner and outer coil sides of the insulating cylinder 103.

[0055] The gaps between the high-voltage coil 101, the insulating cylinder 103, and the low-voltage coil 102 form multiple air channels. An axial air channel is formed between the high-voltage coils 101, and an axial air channel is formed between the high-voltage coils 101. The gaps between the insulating cylinders 103 are blocked by the wind-blocking rings 108 at their ends, preventing gas from passing through. An axial air channel is formed between both the high-voltage coil 101 and the low-voltage coil 102. Three axial air channels are formed inside the low-voltage coil 102. These multiple axial air channels improve the heat dissipation capacity of the coils.

[0056] Because the transformer coil of the present invention is very high and the shaft phase is split into 4 independent coils, the coils cannot conduct heat quickly. When the air heated by the bottom coil rises, the temperature rise of the upper coil will be higher than that of the lower coil. By adding a wind deflector 7 in the middle of the winding 1, the distance between the wind deflector 7 and the coil winding 1 can be adjusted to control the amount of cold air entering the middle, thereby balancing the temperature rise of the upper and lower coils.

[0057] If the wind deflector 7 is not added in the middle, since the power mainly comes from the air intake 401 at the top of the cooling device 4, most of the cold air will directly enter the upper coil from the middle, resulting in only a small amount of cold air entering the lower coil, which in turn causes the temperature rise of the lower coil to be higher than that of the upper coil.

[0058] In this embodiment, multiple intermediate pads 105 are provided between two windings 1 in the same group. An upper pad 104 is provided on the upper side of the windings 1 in the same group, and a lower pad 106 is provided on the lower side. The upper pad 104, lower pad 106 and intermediate pad 105 are used to clamp the high-voltage coil 101 and the low-voltage coil 102, to position and fix them. Multiple upper pads 105, lower pads 106 and intermediate pads 104 are evenly arranged in a circumferential shape.

[0059] In this embodiment, multiple fans 10 are provided on the outside of the clamp 9 located on the lower side of the winding 1, and the air outlet of the fans 10 faces the winding 1.

[0060] It should be noted that the fan 10 can be equipped with eight high-pressure axial flow fans to blow air upwards. To compensate for the significantly increased air resistance inside the transformer due to its excessive height, the cooling device 4 is used in conjunction to ensure sufficient airflow through the coils. During operation, the fan 10 blows cool air from below into the space between the high-voltage coil 101, the low-voltage coil 102, and the iron core 2, pushing the hot air inside upwards to dissipate heat from the inside of the winding 1, while simultaneously distributing the cool air more evenly below the baffle plate 5.

[0061] This system is particularly suitable for a single 24-pulse rectifier dry-type transformer of 35kV class. Through the precise air control of the wind baffle 5 and the wind baffle 7, it reduces local hot spots under harmonic load.

[0062] When the above-mentioned device is working, the cooling device 4 is activated. The air inlet 401 draws the hot air above the baffle 5 into the cooling device 4. After being cooled by the water-cooled core at the bottom of the cooling device 4, the air is discharged into the bottom of the outer casing 11 through the air outlet 402. The fan 10 blows the cold air upward to assist in cooling and air circulation. The gas entering the winding 1 cools its interior, and the air outside the winding 1 cools its exterior. When the air passes through the baffle 5, it passes through the gap between the through-hole 503 of the baffle 5 and the winding 1. The cold air is accelerated, thereby better cooling the winding 1 above the baffle 5.

[0063] In this embodiment, the baffle plate 5 creates a gap for accelerating air, which enhances the cooling of the frequently heated part of the winding 1 by the accelerated cold air. In addition, the baffle 7 ensures the cooling effect of the lower winding 1. The above settings enhance the cooling effect of the transformer and improve the stability of the transformer operation.

[0064] Example 2

[0065] In actual use, it was found that the cooling effect in the direction away from the cooling device 4 was not as good as that in the direction closer to the cooling device 4. In other words, the cooling system could not effectively ensure the uniformity of heat dissipation of the transformer, and there was a problem that the coil winding 1 could not be accurately cooled when local high temperature was generated.

[0066] To solve the above-mentioned technical problems, in another embodiment of the present invention, the baffle plate 5 is slidably connected to the fixed frame 3, and the cooling system of the dry-type transformer also includes a lifting component 6, which is connected to the baffle plate 5 and can drive the baffle plate 5 to move, thereby changing the cooling position of the winding 1.

[0067] It should be noted that multiple temperature sensors are installed in different locations inside the transformer. When an abnormal temperature is detected in a certain area, the lifting component 6 drives the baffle plate 5 to move longitudinally, so that the baffle plate 5 is located near the abnormal area, allowing the cold air accelerated when passing through the baffle plate 5 to accurately cool the abnormal area.

[0068] In this embodiment, two wind deflectors 5 are provided along the longitudinal direction, located on the upper and lower sides of the wind deflector 7 respectively, and both wind deflectors 5 are connected to lifting components 6.

[0069] It should be noted that the two baffles 5 correspond to the two longitudinal windings 1. When both longitudinal windings 1 have abnormal temperature areas, the two baffles 5 can simultaneously cool their respective windings 1, thus improving the comprehensiveness of transformer cooling.

[0070] In this embodiment, the wind deflector 5 is further provided with a plurality of sliding members 501. The sliding members 501 are located at the edge of the wind deflector 5 and are slidably connected to the fixing frame 3. The sliding members 501 ensure the stability of the wind deflector 5 during movement.

[0071] The wind deflector 5 is also provided with a ventilation port 502. There are multiple ventilation ports 502 of different sizes, which can achieve uniform distribution of cooling gas.

[0072] It should be noted that different vents 502 are provided on the two baffles 5. Generally speaking, the vent 502 that is far away from the cooling device 4 is larger than the vent 502 that is close to the cooling device 4, which increases the flow of gas in the part that is far away from the cooling device 4, thereby balancing the overall cooling state inside the outer shell 11 and ensuring the uniformity of overall cooling.

[0073] The lifting assembly 6 can move the wind deflector 5 using a gear and rack mechanism, such as... Figure 5 As shown, the wind deflector 5 is provided with a first driving member 602, and a first gear 601 is coaxially provided on the output shaft of the first driving member 602. A first rack 603 is provided on one side of the first gear 601 and meshes with it. The first rack 603 is connected to the fixed frame 3. After the first driving member 602 is started, it drives the first gear 601 to rotate. Through meshing with the first rack 603, the wind deflector 5 moves up and down.

[0074] The lifting assembly 6 can also move the wind deflector 5 by means of a lead screw drive. The fixed frame 3 is provided with a rotating connecting lead screw, one end of which is provided with a drive motor. The lead screw passes through the sliding member 501 and engages with the sliding member 501. When the drive motor is started, the lead screw rotates, and the sliding member 501 moves longitudinally, thereby driving the wind deflector 5 to move.

[0075] When the temperature sensor detects an abnormal temperature, the lifting assembly 6 moves the baffle 5 to the abnormal area, the cooling device 4 works normally, and the cold air increases its flow speed after passing through the gap. At the same time, more cold air passes through the abnormal area, which can accurately cool the abnormal temperature area.

[0076] In this embodiment, by setting up the lifting component 6 and the vent 502, and in conjunction with the through-hole 503 of the baffle plate 5, the winding 1 can be cooled precisely in all directions, while ensuring the uniformity of heat dissipation of the transformer.

[0077] Example 3

[0078] In actual use, the air temperature rises after the air from the lower side of winding 1 enters the upper side, resulting in the gas temperature inside the upper section of winding 1 being higher than that inside the lower section. When the temperature inside the upper section of winding 1 is too high, the already heated gas cannot be cooled down sufficiently.

[0079] To solve the above-mentioned technical problems, in another embodiment of the present invention, the windshield 7 includes a fixing member 701 and a moving member 702, and a connecting member 703 is provided between the fixing member 701 and the fixing frame 3; the fixing member 701 and the moving member 702 are slidably connected.

[0080] It should be noted that the upper end of the wind baffle 7 is provided with an inwardly converging guide surface. The fixing part 701 of the wind baffle 7 is connected to the fixing frame 3 through the connecting part 703. The moving part 702 slides longitudinally on the fixing part 701. When the transformer is working normally, the moving part 702 is in the initial position and does not contact either of the two wind baffles 5. There is a gap between the wind baffle 7 and the winding 1. Only part of the cold air ejected from the gap between the through-hole 503 of the lower wind baffle 5 and the winding 1 will enter the wind baffle 7, and the rest of the gas will pass through the upper part. The baffle plate 5 cools the outside of the winding 1. When the internal temperature of the winding 1 rises abnormally, the moving part 702 moves and contacts the baffle plate 5 below. At this time, the gap between the upper end of the baffle 7 and the winding 1 widens, exposing the gap between the two windings 1, rather than completely separating them. Most of the cold air passing through the through-hole 503 is located inside the baffle 7, and the cold air is guided to the gap between the two windings 1 through the guide surface, so that the cold air outside the winding 1 enters the interior of the winding 1, improving the cooling effect inside the winding 1.

[0081] In this embodiment, the fixed member 701 is provided with a movable component 8, which can drive the movable member 702 to move. It should be noted that, through real-time monitoring by the temperature sensor, the state of the windshield 7 is dynamically adjusted by the movable component 8 to control abnormal coil temperatures in real time.

[0082] In this embodiment, as Figure 6 As shown, the moving component 8 includes a second driving member 802, which is connected to the fixed member 701 and located outside the windshield 7. A coaxial second gear 801 is mounted on the output shaft of the second driving member 802. A second rack 803 meshes with one side of the second gear 801 and is connected to the moving component 702. When the second driving member 802 is activated, it drives the second gear 801 to rotate, causing the moving component 702 to move longitudinally through the meshing of the gear and rack.

[0083] When the internal temperature of winding 1 rises abnormally, the second drive component 802 is activated, driving the moving component 702 to move longitudinally through the second gear 801 and the second rack 803, so that the lower end of the moving component 702 contacts the wind baffle 5 below. The two work together to keep most of the cold air passing through the through-hole 503 inside the wind baffle 7, and send the cold air into the winding 1 through the guide surface on the wind baffle 7, thereby enhancing the cooling effect on the inside of the winding 1.

[0084] The present invention improves the cooling capacity of the winding 1 by setting the movable part 702 and the movable component 8 in the wind deflector 7. When the internal temperature of the winding 1 rises abnormally, the movable part 702 and the movable component 8 work together to enhance the cooling capacity of the winding 1, thus solving the problem that the internal temperature of the winding 1 cannot be fully cooled after abnormal rise.

[0085] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cooling system for a dry-type transformer, comprising a mounting frame (3), wherein an iron core (2) is disposed within the mounting frame (3), and a winding (1) is sleeved on the outer side of the iron core (2), characterized in that, Also includes: A cooling device (4) is installed on one side of the fixed frame (3) and can cool the winding (1); The wind deflector (5) is located inside the fixed frame (3) and slidably connected thereto. The wind deflector (5) is provided with a through hole (503) for the winding (1) to pass through. There is a gap between the through hole (503) and the outside of the winding (1) so that the passing air can be accelerated, thereby locally cooling the winding (1). The lifting assembly (6) is connected to the baffle plate (5) and can drive the baffle plate (5) to move, thereby changing the cooling position of the winding (1). The winding (1) is provided in multiple ways. Two windings (1) arranged coaxially form a group, and a wind deflector (7) is provided between two windings (1) in the same group. Two wind deflectors (5) are provided along the longitudinal direction, located on the upper and lower sides of the wind deflector (7) respectively, and each wind deflector (5) is connected to a lifting assembly (6). The two wind deflectors (5) correspond to the two windings (1) in the longitudinal direction. When an abnormal temperature area is detected in the winding (1), the wind deflector (5) at the corresponding position is moved longitudinally to the vicinity of the abnormal area by the lifting component (6), so that the cold air accelerated when passing through the wind deflector (5) can accurately cool down the abnormal area. Each wind deflector (5) can independently respond to and handle the temperature abnormality of its corresponding winding (1). The wind deflector (5) is also provided with a plurality of sliding parts (501), which are slidably connected to the fixing frame (3).

2. The cooling system according to claim 1, characterized in that, The wind deflector (5) is also provided with a ventilation port (502), and there are multiple ventilation ports (502) to achieve uniform distribution of cooling gas.

3. The cooling system according to claim 1, characterized in that, The cooling device (4) is located outside one side of the fixing frame (3) and is connected to the fixing frame (3).

4. The cooling system according to claim 1, characterized in that, The cooling device (4) has an air inlet (401) and an air outlet (402) on the side near the winding (1). The air inlet (401) is at a higher horizontal height than the baffle plate (5), and the air outlet (402) is at a lower horizontal height than the baffle plate (5).

5. The cooling system according to claim 1, characterized in that, The fixing frame (3) is connected to a plurality of clamps (9), which can clamp and fix the iron core (2).

6. The cooling system according to claim 5, characterized in that, Multiple fans (10) are provided on the outside of the clamp (9) located on the lower side of the winding (1), and the air outlet of the fans (10) faces the winding (1).

7. The cooling system according to claim 1, characterized in that, The windshield (7) is sleeved on the outside of the winding (1). The windshield (7) includes a fixing part (701) and a moving part (702). A connecting part (703) is provided between the fixing part (701) and the fixing frame (3). The fixing part (701) and the moving part (702) are slidably connected.

8. The cooling system according to claim 7, characterized in that, The fixing member (701) is provided with a moving component (8) which can drive the moving component (702) to move.

Images