Cooling structure for a folded core and transformer

Abstract

The application provides a cooling structure for a chamfered core and a transformer, the chamfered core is a rectangular frame body, four corners of the rectangular frame body have chamfered areas, and the cooling structure is a flow channel plate; the flow channel plate is attached to the side wall of the rectangular frame body, and the flow channel plate is distributed along the thickness direction of the rectangular frame body; a heat-conducting blade is arranged in the flow channel of the flow channel plate, and the installation position of the heat-conducting blade is adjacent to the chamfered area. With the heat-conducting blade in the flow channel plate, excessive heat of the chamfered area of the chamfered core is fully exchanged with the cooling medium through the heat-conducting blade to realize rapid cooling of the chamfered area and improve the heat exchange efficiency of the chamfered area. The heat-conducting blade breaks the laminar flow state of the cooling medium to enhance the turbulent flow effect, realize local cooling of the chamfered core, reduce the risk of local overheating of the chamfered core, ensure the balanced temperature distribution of the chamfered core as a whole, and prolong the service life of the chamfered core.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, specifically providing a cooling structure for a bent iron core and a transformer. Background Technology

[0002] With the accelerated development of new power systems, transformer technology is undergoing a major revolution, focusing on higher efficiency, greater power density, and more compact structural design to meet the stringent requirements of modern power equipment. In this technological evolution, angled cores, due to their significant advantages in efficiency, weight, and manufacturing processes, are gradually becoming the core direction for future transformer core design, leading a new trend in improving the energy efficiency of power equipment.

[0003] Compared to traditional wound cores, angled cores achieve several performance breakthroughs through innovative structural design. First, the angled structure effectively reduces the air gap problem caused by seams in traditional wound cores, significantly reducing magnetic reluctance and resulting in a more uniform magnetic flux distribution. This improvement not only reduces no-load losses (iron losses) and excitation current but also enhances the overall energy efficiency of the transformer. Second, through precisely controlled angled lamination technology, the angled core optimizes eddy current paths, effectively reducing additional losses under high-frequency operating conditions. The angled design makes the core cross-section closer to a circle, significantly increasing the coil space fill rate. This not only improves power density but also makes the equipment structure more compact, making it particularly suitable for space-constrained applications such as offshore wind power and data centers—fields sensitive to equipment size and weight.

[0004] However, the corner of the core often generates excessively high temperatures. These high temperatures not only accelerate the irreversible degradation of the magnetic properties of the silicon steel sheets, but also cause the insulation coating between the core laminations to age and fail, increasing eddy current losses. Uneven thermal expansion can also cause deformation of the core structure. Particularly in oil-immersed transformers, localized high temperatures in the core can also trigger the cracking of the insulating oil, producing deposits and affecting heat dissipation. The combined effect of these factors significantly reduces the operational reliability and service life of the transformer equipment, while also increasing maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of localized overheating in the angled iron core of existing transformers.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] This invention provides a cooling structure for a bent iron core, wherein the bent iron core is a rectangular frame with chamfered areas at its four corners, and the cooling structure is a flow channel plate; the flow channel plate is attached to the side wall of the rectangular frame and is distributed along the thickness direction of the rectangular frame; heat-conducting blades are provided in the flow channels of the flow channel plate, and the installation positions of the heat-conducting blades are adjacent to the chamfered areas.

[0008] Preferably, the flow channel plate includes a first flow channel plate, a first flow channel and a first extended flow channel formed in the first flow channel plate and communicating with each other, and a first heat-conducting blade disposed in the first extended flow channel; the first flow channel plate is circumferentially attached to the outer wall of the rectangular frame, and the first extended flow channel is adjacent to the chamfered area on the outer side of the rectangular frame.

[0009] Preferably, the first flow channel plate is further provided with a plurality of diverting heat-conducting columns. The first heat-conducting blades are distributed along the width direction of the first flow channel plate to divide the first extended flow channel into a first outer extended flow channel and a first inner extended flow channel. The first inner extended flow channel is close to the chamfered area on the outside of the rectangular frame. The plurality of diverting heat-conducting columns are located in the first inner extended flow channel and are arranged parallel to the first heat-conducting blades.

[0010] Preferably, the flow channel plate further includes a second flow channel plate, a second flow channel and a second extended flow channel formed in the second flow channel plate and communicating with each other, and a second heat-conducting blade disposed in the second extended flow channel; the second flow channel plate is circumferentially attached to the inner sidewall of the rectangular frame, and the second extended flow channel is adjacent to the chamfered area inside the rectangular frame.

[0011] Preferably, the second heat-conducting blades are distributed along the width direction of the second flow channel plate.

[0012] Preferably, the number of heat-conducting blades is 1 to 5.

[0013] Preferably, the thickness of the heat-conducting blade is 0.5mm-1mm.

[0014] Preferably, the heat-conducting blades are made of aluminum alloy or copper.

[0015] Preferably, the flow channel plate includes two identical U-shaped plate structures, which are joined and abutted against the inner or outer side of the rectangular frame, and the width of the U-shaped plate structure does not exceed the thickness of the angled iron core.

[0016] Preferably, each of the U-shaped plate structures includes at least two independent flow channels.

[0017] Preferably, the flow channel is distributed in a serpentine pattern along the width direction of the U-shaped plate structure, and the flow channel bends 2 to 8 times.

[0018] Preferably, the thickness of the flow channel plate is 8mm-15mm, and the flow channel diameter of the flow channel plate is 3mm-10mm.

[0019] Based on the same inventive concept, the present invention also provides a transformer that employs the aforementioned angled iron core cooling structure.

[0020] Preferably, the transformer includes a bent iron core and a clamping assembly; the cooling structure includes a first flow channel plate attached to the outer side of the bent iron core and a second flow channel plate attached to the inner side of the bent iron core; the clamping assembly fixes and clamps the integral pre-assembled component consisting of the first flow channel plate, the bent iron core and the second flow channel plate.

[0021] Preferably, the clamping assembly includes two identical clamping plates and a pull rod connecting the two clamping plates, and the clamping plates have receiving grooves; in the height direction of the integral pre-assembled part, the end of the integral pre-assembled part is embedded in the receiving groove and fixed, and the pull rod is tightened so that the two clamping plates clamp the integral pre-assembled part.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention provides a cooling structure for a bendable iron core. The bendable iron core is a rectangular frame with chamfered areas at its four corners. The cooling structure is a flow channel plate. The flow channel plate is attached to the sidewall of the rectangular frame and distributed along the thickness direction of the rectangular frame. Heat-conducting blades are installed within the flow channels of the flow channel plate, and the installation positions of the heat-conducting blades are adjacent to the chamfered areas. With this arrangement, the excess heat in the chamfered areas of the bendable iron core is fully exchanged with the cooling medium through the heat-conducting blades, achieving rapid cooling of the chamfered areas and improving the heat exchange efficiency of the chamfered areas. Furthermore, the heat-conducting blades break the laminar flow state of the cooling medium to enhance the turbulent effect, optimize the flow channel layout inside the flow channel plate, ensure that the cooling medium fully covers the chamfered areas, achieve localized cooling of the bendable iron core, reduce the risk of localized overheating, ensure a balanced overall temperature distribution of the bendable iron core, and extend the service life of the bendable iron core.

[0024] This invention also provides a transformer with a cooling structure for a bent iron core. The transformer includes a bent iron core and a clamping assembly. A first flow channel plate attached to the outer side of the bent iron core and a second flow channel plate attached to the inner side of the bent iron core not only increase the heat dissipation contact area, but the first flow channel plate also assists in supporting the clamping assembly, and the second flow channel plate also supports and fixes the bent iron core, thereby improving the overall heat dissipation efficiency of the transformer and simplifying the installation structure. Attached Figure Description

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

[0026] Figure 2 This is a schematic diagram of the structure of the integrated pre-assembled component consisting of the cooling structure and the angled iron core of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the transformer of the present invention;

[0028] Figure 4 This is a schematic diagram of the overall structure of the first flow channel plate of the cooling structure of the present invention;

[0029] Figure 5 This is a partial structural diagram of the first flow channel plate located in the chamfered region in Embodiment 1 of the present invention;

[0030] Figure 6 This is a partial structural diagram of the first flow channel plate located in the chamfered region in Embodiment 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the overall structure of the second flow channel plate of the cooling structure of the present invention;

[0032] Figure 8 This is a partial structural diagram of the second flow channel plate located in the chamfered region in Embodiment 3 of the present invention;

[0033] Figure 9 This is a partial structural diagram of the second flow channel plate located in the chamfered region in Embodiment 4 of the present invention;

[0034] Figure 10 This is a schematic diagram of the clamping plate structure of the clamping assembly of the present invention.

[0035] Figure descriptions: 1-Angled iron core; 2-First flow channel plate; 21-First interface; 211-First flow channel; 212-First outer expansion flow channel; 213-First inner expansion flow channel; 22-First heat-conducting blade; 23-Diverting heat-conducting column; 3-Second flow channel plate; 31-Second interface; 311-Second flow channel; 312-Second outer expansion flow channel; 313-Second inner expansion flow channel; 32-Second heat-conducting blade; 4-Low-voltage winding; 5-High-voltage winding; 6-Insulating support block; 7-Clamping plate; 71-Mounting hole; 72-First through hole; 73-Second through hole; 74-Receiving groove; 8-Tie rod; a-Chamfered area. Detailed Implementation

[0036] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] This invention provides a cooling structure for angled iron cores, such as... Figures 1 to 3 As shown, the angled iron core 1 is a rectangular frame with chamfered areas a at the four corners. The cooling structure is a flow channel plate. The flow channel plate is attached to the side wall of the rectangular frame and is distributed along the thickness direction of the rectangular frame. Heat-conducting blades are provided in the flow channel of the flow channel plate, and the installation position of the heat-conducting blades is adjacent to the chamfered areas a.

[0040] The rectangular frame of the angled iron core 1 has a width of 223mm-233mm, a height of 350mm-370mm, and a thickness of 40mm-50mm. The angled iron core 1 is assembled from ultra-thin silicon steel angles.

[0041] The thickness of the flow channel plate is 8mm-15mm, and the diameter of the flow channel inside the flow channel plate is 3mm-10mm. The flow channel plate is made of aluminum alloy, and the heat-conducting blades are made of aluminum alloy or copper. There are 1-5 heat-conducting blades, and the thickness of the heat-conducting blades is 0.5mm-1mm. The bending direction of the heat-conducting blades is consistent with that of the flow channel, and the two ends of the heat-conducting blades are rounded.

[0042] The flow channel plate comprises two identical U-shaped plate structures, which are joined and abutted against the inner or outer side of the rectangular frame. The width of the U-shaped plate structure does not exceed the thickness of the angled iron core 1. Each U-shaped plate structure includes at least two independent flow channels. The flow channels are distributed in a serpentine pattern along the width direction of the U-shaped plate structure, with 2 to 8 bends. That is, the two U-shaped plate structures have a total of four independent flow channels, each of which covers each chamfered area 'a' of the corresponding rectangular frame.

[0043] When the cooling medium passes through the heat-conducting blades in the flow channel plate, the excess heat concentrated in the chamfered area a of the angled iron core 1 is fully exchanged with the cooling medium through the heat-conducting blades, which improves the heat exchange efficiency of the chamfered area a, realizes local cooling of the angled iron core 1, reduces the risk of local overheating on the angled iron core 1, and ensures a balanced overall temperature distribution of the angled iron core 1.

[0044] The cooling structure of the angled iron core of the present invention will be described in detail below through several specific embodiments.

[0045] Example 1

[0046] like Figures 2 to 5 As shown, the cooling structure of the angled iron core in this embodiment of the invention includes a first flow channel plate 2, a first flow channel 211 and a first extended flow channel formed in the first flow channel plate 2 and communicating with each other, and a first heat-conducting blade 22 disposed in the first extended flow channel; the first flow channel plate 2 is circumferentially attached to the outer wall of the rectangular frame, and the first extended flow channel is adjacent to the chamfered area a on the outer side of the rectangular frame.

[0047] Specifically, such as Figure 4 As shown, the first flow channel plate 2 is composed of two U-shaped plate structures joined together and abutted against the outer wall of the rectangular frame, with the flow channel bending 6 times. Each U-shaped plate structure includes two independently symmetrically distributed serpentine flow channels, each including a first flow channel 211 and a first extended flow channel. The first flow channel 211 is a parallel straight flow channel in both the horizontal and vertical sections, while the first extended flow channel is arc-shaped, positioned adjacent to the outer side of the chamfered area a of the angled iron core 1. There are three first heat-conducting blades 22, each 0.5 mm thick, arranged parallel to the width of the U-shaped plate structure and adapted to the arc-shaped bend. Each flow channel has a pair of first interfaces 21 at both ends, connecting to the outside, with each pair of first interfaces 21 distributed on both sides of the width of the U-shaped plate structure.

[0048] When the high-temperature heat on the outside of the chamfered region a of the angled iron core 1 is transferred to the first extended flow channel of the first flow channel plate 2, the cooling medium flows into the first extended flow channel and exchanges heat fully with the first heat-conducting blade 22 located in the first extended flow channel to quickly remove the high-temperature heat on the outside of the chamfered region a, thereby achieving local effective cooling of the angled iron core 1.

[0049] Example 2

[0050] like Figure 6As shown, the cooling structure of the angled iron core in this embodiment differs from that in Embodiment 1 in that the first heat-conducting blade 22 in this embodiment is a single piece. The first heat-conducting blade 22 is distributed along the width direction of the first flow channel plate 2, dividing the first extended flow channel into a first outer extended flow channel 212 and a first inner extended flow channel 213. The first inner extended flow channel 213 is located near the chamfered area a on the outer side of the rectangular frame. Multiple diversion heat-conducting columns 23 are also provided within the first flow channel plate 2. These columns are located within the first inner extended flow channel 213 and are arranged parallel to the first heat-conducting blade 22. The volume of the first inner extended flow channel 213 is larger than that of the first outer extended flow channel 212. In the width direction of the U-shaped plate structure, the wall thickness between two adjacent first extended flow channels does not exceed 5 mm. Each first inner extended flow channel 213 contains 14 diversion heat-conducting columns 23. With this configuration, multiple first inner expansion channels 213 can fully contact and cover the chamfered region a outside the angled iron core 1. Simultaneously, the first expansion channels can accommodate more cooling medium, increasing the overall heat exchange ratio between the cooling medium and the chamfered region a. The first outer expansion channel 212 is a long, narrow, curved arc structure, ensuring uniform and stable flow and heat exchange of the cooling medium. Within the first inner expansion channels 213, the shunt heat-conducting columns 23 create turbulence in the cooling medium, enhancing heat exchange efficiency. This allows for rapid heat exchange between the cooling medium and the shunt heat-conducting columns 23 within a unit of time, enabling the cooling medium to carry more heat and ensuring effective heat dissipation and cooling of the chamfered region a.

[0051] It should be noted that the other structures in the embodiments of the present invention are exactly the same as those in Embodiment 1, so they will not be described again here.

[0052] Example 3

[0053] like Figure 2 , Figure 3 , Figure 7 as well as Figure 8 As shown, the cooling structure of the angled iron core in this embodiment of the invention includes a second flow channel plate 3, a second flow channel 311 and a second extended flow channel formed in the second flow channel plate 3 and communicating with each other, and a second heat-conducting blade 32 disposed in the second extended flow channel; the second flow channel plate 3 is circumferentially attached to the inner sidewall of the rectangular frame, and the second extended flow channel is adjacent to the chamfered area a inside the rectangular frame.

[0054] Specifically, such as Figure 4As shown, the second flow channel plate 3 is composed of two U-shaped plate structures joined together and abutted against the inner wall of the rectangular frame, with the flow channel bending 6 times. Each U-shaped plate structure includes two independently symmetrically distributed serpentine flow channels, each including a second flow channel 311 and a second extended flow channel. The second flow channel 311 is a parallel straight flow channel in both the horizontal and vertical sections, while the second extended flow channel is arc-shaped, positioned adjacent to the inner side of the chamfered area a of the angled iron core 1. There is one second heat-conducting blade 32, 1 mm thick, which is parallel to the width direction of the U-shaped plate structure and adapted to the arc-shaped bend. Each flow channel has a pair of second interfaces 31 at both ends, connecting to the outside, with each pair of second interfaces 31 distributed on both sides of the width direction of the U-shaped plate structure.

[0055] When the high-temperature heat inside the chamfered region a of the angled iron core 1 is transferred to the second extended flow channel of the second flow channel plate 3, the cooling medium flows into the second extended flow channel and exchanges heat fully with the second heat-conducting blade 32 located in the second extended flow channel to quickly remove the high-temperature heat outside the chamfered region a, thereby achieving local effective cooling of the angled iron core 1.

[0056] Example 4

[0057] like Figure 9 As shown, the cooling structure of the angled iron core in this embodiment differs from that in Embodiment 3 in that the second heat-conducting blades 32 are distributed along the width direction of the second flow channel plate 3, dividing the second extended flow channel into a second outer extended flow channel 312 and a first inner extended flow channel 313. The first outer extended flow channel 312 is close to the chamfered area a inside the rectangular frame. The wall thickness between two adjacent second extended flow channels does not exceed 5 mm, allowing multiple second outer extended flow channels 312 to fully cover the chamfered area a inside the angled iron core 1. Simultaneously, the second extended flow channels can accommodate more cooling medium, increasing the overall heat exchange ratio between the cooling medium and the chamfered area a.

[0058] It should be noted that the other structures in the embodiments of the present invention are exactly the same as those in Embodiment 3, and therefore will not be described in detail here.

[0059] Example 5

[0060] Based on the same inventive concept, the present invention provides a transformer, which includes the cooling structure of the angled iron core of Embodiments 1-4.

[0061] Specifically, such as Figures 1 to 3As shown, the transformer in this embodiment of the invention includes a bent iron core 1, windings, and a clamping assembly. The cooling structure includes a first flow channel plate 2 attached to the outer side of the bent iron core 1 in embodiment 1 or 2, and a second flow channel plate 3 attached to the inner side of the bent iron core 1 in embodiment 3 or 4. That is, the first flow channel plate 2 has the same outer contour as the bent iron core 1, and the second flow channel plate 3 has the same inner contour as the bent iron core 1. The width of both the first flow channel plate 2 and the second flow channel plate 3 is equal to the thickness of the bent iron core 1, which is 47 mm thick, and the thickness of both the first flow channel plate 2 and the second flow channel plate 3 is 10 mm.

[0062] like Figure 2 As shown, the transformer windings in this embodiment of the invention include a low-voltage winding 4 and a high-voltage winding 5. The low-voltage winding 4 and the high-voltage winding 5 comprise two sets. Each low-voltage winding 4 is located circumferentially on the left and right vertical core columns of the angled iron core 1. The horizontal distance between the inner side of the low-voltage winding 4 and the two sides of the vertical core column, the outer surface of the first flow channel plate 2, and the inner surface of the second flow channel plate 3 is 3mm-5mm. The thickness of the low-voltage winding 4 is 10mm-20mm, and the height of the low-voltage winding 4 is 270mm-290mm. The low-voltage winding 4 is made of copper.

[0063] Each high-voltage winding 5 is located outside the low-voltage winding 4. The horizontal distance between the inner side of the high-voltage winding 5 and the outer side of the low-voltage winding 4 is 15mm-35mm. The thickness of the high-voltage winding 5 is 20mm-40mm, the height of the high-voltage winding 5 is 270mm-290mm, and the material of the high-voltage winding 5 is copper.

[0064] The clamping assembly includes two identical clamping plates 7 and a pull rod 8 connecting the two clamping plates 7. The central area of ​​the clamping plates 7 has a rectangular receiving groove 74.

[0065] Each clamping plate 7 has six mounting holes 71 with a diameter of 10mm-14mm circumferentially arranged for mating with the tie rod 8. The outer circumferential of the receiving groove 74 of each clamping plate 7 has 14-18 reinforcing ribs. Four through holes with a diameter of 6mm-10mm are respectively provided on the two side walls of the receiving groove 74 for connecting the first flow channel plate 2 and the second flow channel plate 3 to the cooling pipes. The through holes on each clamping plate 7 include four pairs of first through holes 72 and four pairs of second through holes 73. Each pair of first through holes 72 is symmetrically distributed on both sides of the receiving groove 74, and each pair of first through holes 72 is opposite to the first interface 21 located at both ends of the flow channel in the first flow channel plate 2. Each pair of second through holes 73 is opposite to the second interface 31 located at both ends of the flow channel in the second flow channel plate 3.

[0066] In addition, there are a total of 6 tie rods 8 used to tighten the fixed clamping plate 7. The diameter of the tie rod 8 is 10mm-14mm and the length of the tie rod 8 is 370mm-390mm. The 6 tie rods 8 are symmetrically distributed on both sides of the thickness direction of the angled iron core 1, with 3 tie rods 8 on each side.

[0067] The clamping assembly also includes insulating support blocks 6 for supporting and fixing the low-voltage winding 4 and the high-voltage winding 5. There are a total of 16 insulating support blocks 6, with four blocks placed on the upper and lower surfaces of each set of low-voltage winding 4 and high-voltage winding 5, and the four blocks are symmetrically distributed.

[0068] When assembling a transformer, the first pre-assembled component is formed by assembling the first flow channel plate 2, the angled iron core 1, and the second flow channel plate 3.

[0069] In the height direction of the overall pre-assembled component, both ends of the overall pre-assembled component are respectively embedded into the receiving grooves 74 of the upper and lower side clamping plates 7 for fixation, and the pull rods 8 are tightened so that the two clamping plates 7 pre-clamp the overall pre-assembled component. Specifically, the pull rods 8 are distributed at the center positions on both sides of the clamping plates 7.

[0070] Then, the core column of the angled iron core 1 is wound with low-voltage winding 4 and high-voltage winding 5 and the corresponding insulating support block 6 is installed.

[0071] Finally, the remaining tie rod 8 is installed and the tension is adjusted so that the clamping plate 7, the first flow channel plate 2, the angled iron core 1, the winding and the insulating support block 6 are clamped and fixed together in the height direction to complete the assembly, which simplifies the assembly steps and structure and improves the assembly efficiency.

[0072] The transformer of this invention has the following beneficial effects:

[0073] 1. The inner and outer surface areas of the angled iron core 1 account for more than 70%. The first flow channel plate 2 and the second flow channel plate 3 are fully covered and are attached to the inner and outer contours of the angled iron core 1. The effective heat dissipation area utilization rate reaches 95%. While maintaining a compact structure, the maximum heat dissipation area is achieved. The heat dissipation area of ​​the inner and outer surfaces is 2.2-2.5 times larger than that of traditional front and rear surface heat dissipation.

[0074] In addition, the first flow channel plate 2 and the second flow channel plate 3 are respectively attached to the inner and outer contours of the angled iron core 1 to form a clamping double heat dissipation structure. The air gap between the first flow channel plate 2 and the second flow channel plate 3 and the low-voltage winding 4 is only 3mm-5mm. The heat of the low-voltage winding 4 is transferred to the first flow channel plate 2 and the second flow channel plate 3 in the form of heat conduction, which forces the heat to be carried away. That is, the first flow channel plate 2 and the second flow channel plate 3 simultaneously absorb the heat lost by the angled iron core 1 and the heat conducted by the low-voltage winding 4, so as to achieve a uniform distribution of the temperature field in all directions.

[0075] Multiple independent serpentine flow channels on the first flow channel plate 2 and the second flow channel plate 3 enable the heat exchange medium to enter and exit quickly for efficient heat exchange, achieving synchronous and efficient heat exchange on the inner and outer surfaces of the angled iron core 1.

[0076] 2. The cooling structure guides the water flow in the chamfered region a through heat-conducting blades, forcibly breaking the laminar boundary layer, so that the cooling medium forms high-intensity turbulence in the chamfered region a, improving the heat exchange efficiency by 30%-50%, effectively controlling the local hot spot temperature of the angled iron core 1 within a safe range, and avoiding material degradation and insulation aging caused by local overheating.

[0077] 3. High-strength aluminum alloy first flow channel plate 2 and second flow channel plate 3 replace the traditional iron core support components, bearing the weight of the angled iron core 1 and electromagnetic vibration loads while simultaneously providing circulating cooling. The first flow channel plate 2, through an integrated molding process, ensures its outer contour perfectly matches the clamping assembly, simultaneously clamping and balancing the pressure of the angled iron core 1 during heat dissipation. The second flow channel plate 3 forms support and reinforcement for the angled iron core 1 within it. This dual-flow channel plate collaborative design reduces the number of components in the traditional structure and avoids stress concentration problems caused by differences in the thermal expansion coefficients of multiple components, significantly improving the long-term operational stability of the equipment. This design simplifies the complex structure of the traditional water cooling system and mechanical support separation, reducing the number of mechanical components to 5-8, decreasing assembly steps, increasing space utilization by 20%, and lowering manufacturing costs.

[0078] It should be noted that the cooling medium in the above embodiments is water, and the first flow channel plate 2 and the second flow channel plate 3 are respectively connected to the water cooling system to achieve cooling and temperature reduction.

[0079] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A cooling structure for a bent iron core, wherein the bent iron core (1) is a rectangular frame, and the four corners of the rectangular frame have chamfered areas (a), characterized in that, The cooling structure is a flow channel plate; The flow channel plate is attached to the side wall of the rectangular frame and the flow channel plate is distributed along the thickness direction of the rectangular frame; The flow channel plate has heat-conducting blades installed inside the flow channel, and the installation position of the heat-conducting blades is adjacent to the chamfered area (a). The flow channel plate includes a first flow channel plate (2), a first flow channel (211) and a first extended flow channel formed in the first flow channel plate (2) and communicating with each other, and a first heat-conducting blade (22) disposed in the first extended flow channel; the first flow channel plate (2) is circumferentially attached to the outer wall of the rectangular frame, and the first extended flow channel is adjacent to the chamfered area (a) on the outer side of the rectangular frame. The first flow channel plate (2) is also provided with a plurality of flow-dividing heat-conducting columns (23). The first heat-conducting blade (22) is distributed along the width direction of the first flow channel plate (2) to divide the first extended flow channel into a first outer extended flow channel (212) and a first inner extended flow channel (213). The first inner extended flow channel (213) is close to the chamfered area (a) on the outside of the rectangular frame. The plurality of flow-dividing heat-conducting columns (23) are located in the first inner extended flow channel (213) and are arranged parallel to the first heat-conducting blade (22).

2. The cooling structure for the angled iron core according to claim 1, characterized in that, The flow channel plate also includes a second flow channel plate (3), a second flow channel (311) formed in the second flow channel plate (3) and communicating with each other, and a second heat-conducting blade (32) disposed in the second extended flow channel; the second flow channel plate (3) is circumferentially attached to the inner sidewall of the rectangular frame, and the second extended flow channel is adjacent to the chamfered area (a) inside the rectangular frame.

3. The cooling structure for the angled iron core according to claim 2, characterized in that, The second heat-conducting blade (32) is distributed along the width direction of the second flow channel plate (3).

4. The cooling structure for a bent iron core according to claim 1, characterized in that, The number of heat-conducting blades is 1 to 5.

5. The cooling structure for a bent iron core according to claim 1, characterized in that, The thickness of the heat-conducting blade is 0.5mm-1mm.

6. The cooling structure for a bent iron core according to claim 1, characterized in that, The heat-conducting blades are made of aluminum alloy or copper.

7. The cooling structure for a bent iron core according to claim 1, characterized in that, The flow channel plate includes two identical U-shaped plate structures. The two U-shaped plate structures are joined together and attached to the inner or outer side of the rectangular frame. The width of the U-shaped plate structure does not exceed the thickness of the angled iron core (1).

8. The cooling structure for a bent iron core according to claim 7, characterized in that, Each of the U-shaped plate structures includes at least two independent flow channels.

9. The cooling structure for a bent iron core according to claim 8, characterized in that, The flow channels are distributed in a serpentine pattern along the width direction of the U-shaped plate structure, and the flow channels are bent 2 to 8 times.

10. The cooling structure for a bent iron core according to claim 9, characterized in that, The thickness of the flow channel plate is 8mm-15mm, and the diameter of the flow channel plate is 3mm-10mm.

11. A transformer, characterized in that, It employs the cooling structure for the angled iron core as described in any one of claims 1-10.

12. The transformer according to claim 11, characterized in that, The transformer includes a bent iron core (1) and a clamping assembly; the cooling structure includes a first flow channel plate (2) attached to the outside of the bent iron core (1) and a second flow channel plate (3) attached to the inside of the bent iron core (1). The clamping assembly fixes and clamps the pre-assembled component consisting of the first flow channel plate (2), the angled iron core (1), and the second flow channel plate (3).

13. The transformer according to claim 12, characterized in that, The clamping assembly includes two identical clamping plates (7) and a pull rod (8) connecting the two clamping plates (7), and the clamping plates (7) have receiving grooves (74). In the height direction of the integral pre-assembled component, the end of the integral pre-assembled component is embedded in the receiving groove (74) and fixed, and the pull rod (8) is pulled so that the two clamping plates (7) clamp the integral pre-assembled component.

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