A core cooling structure, a core cooling system, a control method, and a transformer

Abstract

This invention provides a core cooling structure, a core cooling system, a control method, and a transformer. The core cooling structure includes a core, a flow channel plate, and a clamping assembly. Along the thickness direction of the core, the clamping assembly clamps the flow channel plate to fix it against the side wall of the core. The flow channel plate includes a rectangular ring body, direct current channels distributed along the four sides of the rectangular ring body, and four interface channels. All four interface channels are connected to the direct current channels and are located at the four corners of the rectangular ring body. Two interface channels located at one set of diagonal positions on the rectangular ring body are used for the inflow of cooling medium, and two interface channels located at the other set of diagonal positions on the rectangular ring body are used for the outflow of cooling medium. This allows the cooling medium to rapidly flow in and out through the direct current channels on the four sides of the rectangular ring body, significantly shortening the heat exchange path of the cooling medium within the flow channel plate, improving heat exchange efficiency, and achieving balanced heat dissipation and cooling of the core.

Description

Technical Field

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

[0002] With the accelerated development of new power systems, transformer technology is undergoing a major revolution, with its core focus on higher efficiency, greater power density, and more compact structural design to meet the stringent requirements of modern power equipment.

[0003] However, the heat generated by the high-frequency losses of the transformer core can sometimes exceed the heat generated by the winding coils, which can cause the temperature rise of the core to be higher than that of the coils.

[0004] Currently, transformer core cooling is achieved by sandwiching cooling channel plates on both sides of the core to dissipate heat and lower its temperature. However, the long and winding channel design within the cooling channel plates results in uneven heat dissipation and cooling in some areas of the core, leading to less than ideal cooling effects in certain localized areas. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of poor cooling effect of existing cooling channel plates on local areas of the iron core.

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

[0007] This invention provides a core cooling structure, comprising a core, a flow channel plate, and a clamping assembly. In the thickness direction of the core, the clamping assembly clamps the flow channel plate to fix it against the side wall of the core. The flow channel plate includes a rectangular ring body, direct current channels distributed along the four sides of the rectangular ring body, and four interface channels. All four interface channels are connected to the direct current channels and are located at the four corners of the rectangular ring body. Two interface channels located at one set of diagonal positions on the rectangular ring body are used for the inflow of cooling medium, and two interface channels located at another set of diagonal positions on the rectangular ring body are used for the outflow of cooling medium.

[0008] Preferably, the DC channel includes two sets of first DC channels and two sets of second DC channels. Each interface channel is connected to the first DC channel and the second DC channel adjacent to each other. Each interface channel is also provided with a flow divider, which is used to distribute the flow entering the first DC channel and the second DC channel.

[0009] Preferably, the flow channel plate includes a first flow channel plate and a second flow channel plate, which are respectively attached to the two side walls of the iron core.

[0010] Preferably, the flow channel plate further includes a third flow channel plate, which is located between the laminations of the iron core.

[0011] Preferably, the clamping assembly includes two sets of clamps and multiple first connecting rods. The two sets of clamps are respectively installed on the iron yokes at both ends of the iron core. Each set of clamps consists of two clamps, and the two ends of each first connecting rod are respectively connected to two clamps to fasten the flow channel plate to the side wall of the iron core.

[0012] Preferably, the clamping assembly further includes a plurality of second connecting rods, the two ends of which are fixedly connected to each set of clamps.

[0013] Based on the same inventive concept, the present invention also provides a core cooling system, including the aforementioned core cooling structure.

[0014] Preferably, the core cooling structure includes a first flow path and a second flow path, and includes a first flow channel plate and a second flow channel plate; the first flow channel plate includes a first interface flow channel, a second interface flow channel, a third interface flow channel, and a fourth interface flow channel; the second flow channel plate includes a fifth interface flow channel, a sixth interface flow channel, a seventh interface flow channel, and an eighth interface flow channel; in the thickness direction of the core, the first interface flow channel and the fifth interface flow channel are symmetrically distributed on both sides of the core; the second interface flow channel and the sixth interface flow channel are symmetrically distributed on both sides of the core; the third interface flow channel and the seventh interface flow channel are symmetrically distributed on both sides of the core; the fourth interface flow channel and the eighth interface flow channel are symmetrically distributed on both sides of the core; the first interface flow channel, the third interface flow channel, the sixth interface flow channel, and the eighth interface flow channel are all connected to the first flow path; the second interface flow channel, the fourth interface flow channel, the fifth interface flow channel, and the seventh interface flow channel are all connected to the second flow path.

[0015] Preferably, it also includes a reversing valve, which includes two pairs of inlet and outlet valve ports; one pair of inlet and outlet valve ports of the reversing valve is connected to the first flow passage and the second flow passage respectively, and the other pair of inlet and outlet valve ports of the reversing valve is used for the inflow and outflow of cooling medium respectively.

[0016] Preferably, the first flow path is provided with a first tee pipe, a second tee pipe, and a third tee pipe; one port of the first tee pipe is connected to one of the two inlet / outlet valve ports of the reversing valve, and the other two ports of the first tee pipe are respectively connected to one port of the second tee pipe and one port of the third tee pipe; the other two ports of the second tee pipe are respectively connected to the first interface flow channel and the sixth interface flow channel; the other two ports of the third tee pipe are respectively connected to the third interface flow channel and the eighth interface flow channel.

[0017] Preferably, the second flow path is provided with a fourth three-way pipe, a fifth three-way pipe, and a sixth three-way pipe; one port of the fourth three-way pipe is connected to the other port of one of the pair of inlet and outlet valve ports in the reversing valve, and the other two ports of the fourth three-way pipe are respectively connected to one port of the fifth three-way pipe and one port of the sixth three-way pipe; the other two ports of the fifth three-way pipe are respectively connected to the second interface flow channel and the fifth interface flow channel; the other two ports of the sixth three-way pipe are respectively connected to the fourth interface flow channel and the seventh interface flow channel.

[0018] Based on the same inventive concept, the present invention also provides a control method for the aforementioned iron core cooling system, characterized in that the reversing valve performs a reversing operation based on a set interval time.

[0019] Based on the same inventive concept, the present invention also provides a transformer, including the core cooling structure described above.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention provides a core cooling structure, comprising a core, a flow channel plate, and a clamping assembly. Along the thickness direction of the core, the clamping assembly clamps the flow channel plate to fix it against the sidewall of the core. The flow channel plate includes a rectangular ring body, direct current channels distributed along the four sides of the rectangular ring body, and four interface channels. All four interface channels are connected to the direct current channels and are located at the four corners of the rectangular ring body. Two interface channels located at one set of diagonal positions on the rectangular ring body are used for the inflow of cooling medium, and two interface channels located at the other set of diagonal positions on the rectangular ring body are used for the outflow of cooling medium. This arrangement allows the cooling medium to flow rapidly in and out of the direct current channels along the four sides of the rectangular ring body, significantly shortening the heat exchange path of the cooling medium within the flow channel plate and improving heat exchange efficiency. It also avoids uneven heat dissipation and cooling of the core due to excessively long flow channels, achieving uniform heat dissipation and cooling of the core. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the iron core cooling structure of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the flow channel plate in the core cooling structure of the present invention.

[0024] Figure 3 This is a partial cross-sectional schematic diagram of the flow channel plate in the core cooling structure of the present invention;

[0025] Figure 4 The assembly position relationship between the iron core and the flow channel plate of the present invention Figure 1 ;

[0026] Figure 5 The assembly position relationship between the iron core and the flow channel plate of the present invention Figure 2 ;

[0027] Figure 6 This is a schematic diagram of the clamping structure of the iron core cooling structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the working state of the iron core cooling system of the present invention. Figure 1 ;

[0029] Figure 8 This is a schematic diagram of the working state of the iron core cooling system of the present invention. Figure 2 .

[0030] Reference numerals: 1-Core; 2-Clamping piece; 21-First mounting through hole; 22-Second mounting through hole; 3-Flow channel plate; 30-Interface flow channel; 301-Flow divider; 31-First DC channel; 32-Second DC channel; 3a-First flow channel plate; 3a1-First interface flow channel; 3a2-Second interface flow channel; 3a3-Third interface flow channel; 3a4-Fourth interface flow channel; 3b-Second flow channel plate; 3b1-Fifth interface flow channel; 3b2-Sixth interface flow channel; 3 b3 - Seventh interface flow channel; 3b4 - Eighth interface flow channel; 3c - Third flow channel plate; 41 - First connecting rod; 42 - Second connecting rod; 51 - First pad component; 52 - Second pad component; 6 - Reversing valve; 61 - First valve port; 62 - Second valve port; 63 - Third valve port; 64 - Fourth valve port; 71 - First tee pipe; 72 - Second tee pipe; 73 - Third tee pipe; 81 - Fourth tee pipe; 82 - Fifth tee pipe; 83 - Sixth tee pipe. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Existing flow channels often employ a serpentine flow pattern with one inlet and one outlet to maximize the heat exchange area of ​​the cooling medium. Since the cooling medium's temperature is constant before entering the flow channel, research has found that the cooling medium absorbs heat and heats up upon entering the channel, resulting in a significant cooling effect on the core at the inlet side. However, as the cooling medium passes through the tail end of the long flow channel, its heat absorption and heating efficiency decreases, significantly reducing the heat exchange effect at the outlet side of the flow channel. This leads to uneven heat dissipation across the core surface area covered by the flow channel, reducing the core's internal structural stability and shortening its service life.

[0035] Example 1

[0036] like Figures 1 to 4 As shown, an embodiment of the present invention provides a core cooling structure, which includes a core 1, a flow channel plate 3, and a clamping assembly.

[0037] In the thickness direction of the core 1, the clamping assembly clamps the flow channel plate 3 so that the flow channel plate 3 is attached and fixed to the side wall of the core 1. The flow channel plate 3 includes a rectangular ring body, a direct current channel distributed along the four sides of the rectangular ring body, and four interface flow channels 30. The four interface flow channels 30 are all connected to the direct current channel and are located at the four corners of the rectangular ring body. Among them, two interface flow channels 30 located at one set of diagonal positions of the rectangular ring plate body are used for the inflow of cooling medium, and two interface flow channels 30 located at another set of diagonal positions of the rectangular ring plate body are used for the outflow of cooling medium.

[0038] In operation, the cooling medium, water or oil, can flow in and out on one side of the flow channel plate 3 to facilitate the rapid removal of heat from the flow channel plate 3, thus avoiding the cooling medium carrying too much heat and performing ineffective heat exchange within the flow channel plate 3, thereby improving the overall rapid cooling effect on the iron core 1.

[0039] Specifically, such as Figure 1 and Figure 4 As shown, the iron core 1 is a rectangular frame with a width of 218mm-238mm, a frame height of 350mm-370mm, and a thickness of 37mm-57mm. The iron core 1 is assembled by stacking ultra-thin silicon steel corner pieces.

[0040] like Figure 2 As shown, the DC channel of the flow channel plate 3 includes two sets of first DC channels 31 and two sets of second DC channels 32. The two sets of first DC channels 31 and the two sets of second DC channels 32 are located on the four sides of the rectangular ring body, respectively. Each interface flow channel 30 is connected to the adjacent first DC channel 31 and second DC channel 32.

[0041] It should be noted that the flow channel plate 3 is made of aluminum alloy, which is easy to process and shape. Each set of direct flow channels consists of 3-8 parallel flow channels with a flow channel diameter of 3mm-10mm. The number of parallel flow channels can be adjusted according to actual needs.

[0042] like Figure 1 and Figure 4 As shown, the flow channel plate 3 includes a first flow channel plate 3a and a second flow channel plate 3b, which are respectively attached to the side walls located at the front and rear of the iron core 1.

[0043] like Figure 1 As shown, the clamping assembly includes two sets of clamps 2 and four sets of first connecting rods 41. The two sets of clamps 2 are respectively installed on the iron yokes (non-winding coil positions) at both ends of the iron core 1. There are two clamps in each set, for a total of 4. There are two first connecting rods 41 in each set, for a total of 8.

[0044] like Figure 6 As shown, clamp 2 is a channel steel structure with a thickness of 3mm-7mm and a length of 350mm-450mm. Both ends of clamp 2 are provided with two first mounting through holes 21 with a diameter of 5mm-9mm. The side wall of clamp 2 is provided with two second mounting through holes 22 with a diameter of 8mm-12mm. The channel steel structure of clamp 2 is also provided with 3-7 supporting ribs with a thickness of 4mm-8mm.

[0045] Two sets of first connecting rods 41 are respectively connected to the two ends of two clamps 2 to fasten the flow channel plate 3 to the side wall of the iron core 1. Specifically, the diameter of the first connecting rod 41 is 5mm-9mm and the length is 152mm-172mm. The two ends of the first connecting rod 41 are respectively fixedly installed on the corresponding first mounting through holes 21 on a set of two clamps 2. The two sets of first connecting rods 41 tighten and fix the two clamps 2 located on the upper yoke of the iron core 1, and the other two sets of first connecting rods 41 tighten and fix the other set of two clamps 2 located on the lower yoke of the iron core 1.

[0046] The clamping assembly also includes a second connecting rod 42, the two ends of which are fixedly connected to each of the upper and lower clamping members 2. Specifically, the diameter of the second connecting rod 42 is 10mm-18mm, and the length is 370mm-410mm. The two ends of the second connecting rod 42 are fixedly installed on the corresponding second mounting through holes 22 on the upper and lower clamping members 2.

[0047] There are four second connecting rods 42. In the direction of gravity, two second connecting rods 42 are vertically positioned on the front side of the iron core 1 to support one side of the two clamping members 2 distributed vertically in the two sets of clamping members 2. The other two second connecting rods 42 are vertically positioned on the rear side of the iron core 1 to support the other side of the two clamping members 2 distributed vertically in the two sets of clamping members 2. The first connecting rod 41 and the second connecting rod 42 are screws.

[0048] The core cooling structure also includes four sets of padding components. Two sets of first padding components 51 are symmetrically distributed and fixed on both sides below the lower yoke of the core 1, providing overall support for the core cooling structure. Two sets of second padding components 52 are vertically distributed and fixed directly below the middle of the upper and lower yokes of the core 1, preventing the yoke of the upper core 1 from collapsing downwards. Each set of padding components includes a rubber pad and a steel plate. The rubber pad is 200mm-220mm long, 4mm-8mm high, and 30mm-50mm wide. Specifically, the steel plate in the vertically distributed second padding components 52 located in the middle of the upper and lower yokes of the core 1 is 290mm-330mm long, 15mm-25mm high, and 30mm-50mm wide. The steel plate in the symmetrically distributed first padding components 51 located on the lower yoke of the core 1 is 200mm-220mm long, 2mm-6mm high, and 30mm-50mm wide.

[0049] It should be noted that all four sets of pad components are fixedly connected to the corresponding clamps 2 and iron cores 1 by bolts.

[0050] Example 2

[0051] like Figure 5As shown, the main difference between this embodiment and embodiment 1 is that the flow channel plate 3 in this embodiment also includes a third flow channel plate 3c, which is located between the laminations of the iron core 1.

[0052] This configuration expands the heat exchange contact area between the iron core 1 and the flow channel plate 3, and also facilitates rapid heat dissipation in the middle area of ​​the iron core 1, greatly improving the heat dissipation and cooling performance of the iron core 1.

[0053] The other structures in this embodiment are exactly the same as those in Embodiment 1, so they will not be described again here.

[0054] Example 3

[0055] like Figure 3 As shown, the main difference between this embodiment and embodiment 1 is that each interface channel 30 of the flow channel plate 3 in this embodiment is further provided with a flow divider 301, which is used to distribute the flow into the first DC channel 31 and the second DC channel 32.

[0056] Specifically, the flow divider 301 is arranged parallel to the direction of the cooling medium flow channel, and the distance between the flow divider 301 and the end of the first direct current channel 31 is less than the distance between the flow divider 301 and the end of the second direct current channel 32, so that more cooling medium can enter the second direct current channel 32 to ensure the heat exchange efficiency of the long side of the flow channel plate 3 to the iron core 1.

[0057] The other structures in this embodiment are exactly the same as those in Embodiment 1, so they will not be described again here.

[0058] Example 4

[0059] like Figure 7 and Figure 8 As shown, this embodiment provides a core cooling system including the core cooling structure in Embodiment 1 or Embodiment 3.

[0060] Specifically, the cooling system includes a first flow path and a second flow path for the cooling medium to flow, and the core cooling structure includes a first flow channel plate 3a and a second flow channel plate 3b.

[0061] like Figure 4 As shown, the first flow channel plate 3a includes a first interface flow channel 3a1, a second interface flow channel 3a2, a third interface flow channel 3a3 and a fourth interface flow channel 3a4 arranged in a clockwise direction, and the second flow channel plate 3b includes a fifth interface flow channel 3b1, a sixth interface flow channel 3b2, a seventh interface flow channel 3b3 and an eighth interface flow channel 3b4 arranged in a clockwise direction.

[0062] In the thickness direction of the core 1, the first interface flow channel 3a1 and the fifth interface flow channel 3b1 are symmetrically distributed on both sides of the core 1, the second interface flow channel 3a2 and the sixth interface flow channel 3b2 are symmetrically distributed on both sides of the core 1, the third interface flow channel 3a3 and the seventh interface flow channel 3b3 are symmetrically distributed on both sides of the core 1, and the fourth interface flow channel 3a4 and the eighth interface flow channel 3b4 are symmetrically distributed on both sides of the core 1.

[0063] The first interface flow channel 3a1, the third interface flow channel 3a3, the sixth interface flow channel 3b2, and the eighth interface flow channel 3b4 are all connected to the first flow path; the second interface flow channel 3a2, the fourth interface flow channel 3a4, the fifth interface flow channel 3b1, and the seventh interface flow channel 3b3 are all connected to the second flow path.

[0064] With this setup, the cooling medium, water or oil, flows in and out synchronously and alternately on both sides of one corner of the iron core 1, ensuring balanced heat dissipation and cooling of both sides of the iron core 1.

[0065] like Figure 7 and Figure 8 As shown, the cooling system of the iron core 1 also includes a reversing valve 6, which includes two pairs of inlet and outlet valve ports. One pair of inlet and outlet valve ports of the reversing valve 6 is connected to the first flow passage and the second flow passage respectively, and the other pair of inlet and outlet valve ports of the reversing valve 6 is used for the inflow and outflow of the cooling medium respectively.

[0066] Specifically, such as Figure 7 and Figure 8 As shown, the first flow path is provided with a first three-way pipe 71, a second three-way pipe 72, and a third three-way pipe 73; one port of the first three-way pipe 71 is connected to one of the two inlet and outlet ports of the reversing valve 6, and the other two ports of the first three-way pipe 71 are connected to one port of the second three-way pipe 72 and one port of the third three-way pipe 73, respectively; the other two ports of the second three-way pipe 72 are connected to the first interface flow channel 3a1 and the sixth interface flow channel 3b2, respectively; the other two ports of the third three-way pipe 73 are connected to the third interface flow channel 3a3 and the eighth interface flow channel 3b4, respectively. The second flow path is provided with a fourth three-way pipe 81, a fifth three-way pipe 82, and a sixth three-way pipe 83; one port of the fourth three-way pipe 81 is connected to the other port of a pair of inlet and outlet valves in the reversing valve 6, and the other two ports of the fourth three-way pipe 81 are connected to one port of the fifth three-way pipe 82 and one port of the sixth three-way pipe 83, respectively; the other two ports of the fifth three-way pipe 82 are connected to the second interface flow channel 3a2 and the fifth interface flow channel 3b1, respectively; the other two ports of the sixth three-way pipe 83 are connected to the fourth interface flow channel 3a4 and the seventh interface flow channel 3b3, respectively.

[0067] Specifically, the reversing valve 6 includes a first valve port 61, a second valve port 62, a third valve port 63, and a fourth valve port 64. The first valve port 61 is used for the inflow of cooling medium, the second valve port 62 is used for the outflow of cooling medium, the fourth valve port 64 is connected to one port of the first tee pipe 71 on the first flow path, and the third valve port 63 is connected to one port of the fourth tee pipe 81 on the second flow path.

[0068] like Figure 7 As shown, in one operating state of the reversing valve 6, the first valve port 61 is connected to the fourth valve port 64, and the second valve port 62 is connected to the third valve port 63. When the cooling medium flows in, it flows through the first valve port 61 and the fourth valve port 64 of the reversing valve 6 into the first flow path, and then flows to the first flow channel plate 3a and the second flow channel plate 3b. After heat exchange with the first flow channel plate 3a and the second flow channel plate 3b, the cooling medium flows back from the second flow path to the fourth valve port 64 of the reversing valve 6 and flows out through the second valve port 62.

[0069] like Figure 8 As shown, in one operating state of the reversing valve 6, the first valve port 61 is connected to the third valve port 63, and the second valve port 62 is connected to the fourth valve port 64. When the cooling medium flows in, it flows through the first valve port 61 and the third valve port 63 of the reversing valve 6 into the second flow path, and then flows to the first flow channel plate 3a and the second flow channel plate 3b. After heat exchange with the first flow channel plate 3a and the second flow channel plate 3b, the cooling medium flows back from the first flow path to the third valve port 63 of the reversing valve 6 and flows out through the second valve port 62.

[0070] With this configuration, the reversing valve 6 enables the cooling medium to reverse its flow direction in the first and second flow paths, ensuring balanced heat dissipation and cooling on both sides of the flow channel plate 3, achieving balanced heat dissipation on both sides of the iron core 1, reducing internal stress damage to the iron core 1, and extending the life of the iron core 1.

[0071] It should be noted that the cooling system also includes radiators, delivery pumps, and containers for containing cooling media, etc., to circulate and cool the iron core 1.

[0072] Example 5

[0073] like Figure 7 and Figure 8 As shown, based on the core cooling system in Embodiment 4, this embodiment of the invention provides a control method for a core cooling system, including:

[0074] In operation, the reversing valve 6 performs a reversing operation based on a set interval.

[0075] Specifically, the reversing valve 6 is a solenoid valve, and the core cooling system includes a controller, which is electrically connected to the reversing valve 6. The controller controls the solenoid valve to reverse its movement based on a set interval (10 minutes to 30 minutes), so that the cooling medium of the flow channel plate 3 can periodically reverse its flow in the first flow path and the second flow path.

[0076] In the same bend area of ​​the core 1, the cooling medium flows into the interface channel 30 of the flow channel plate 3 on one side and flows out of the interface channel 30 of the flow channel plate 3 on the other side. Maintaining this working state for a long time can easily lead to a unidirectional temperature gradient on both sides of the bend area of ​​the core 1. By using this control method, the reversing valve 6 can periodically reverse the direction of the temperature gradient on both sides of the bend area of ​​the core 1 after the reversing action at intervals, so as to ensure that the flow channel plate 3 can provide balanced heat dissipation and cooling to both sides of the core 1.

[0077] Example 6

[0078] Based on the same inventive concept, this invention also provides a transformer, including a core cooling structure according to any one of embodiments 1-3. The transformer windings are mounted on the outside of the vertical core column of the core 1 and the flow channel plate 3.

[0079] Unlike Examples 1-3, the specific structural parameters used in the core cooling structure of this example are as follows:

[0080] Specifically, such as Figure 1 , Figure 2 and Figure 6 As shown, the width of core 1 is 228 mm, the frame height of core 1 is 36 mm, and the thickness of core 1 is 47 mm. Each set of direct current channels in flow channel plate 3 consists of 3 parallel flow channels with a diameter of 5 mm. The thickness of the channel steel structure of clamp 2 is 5 mm, the length of the channel steel structure is 400 mm, the diameter of the first mounting through hole 21 of clamp 2 is 7 mm, the diameter of the second mounting through hole 22 of clamp 2 is 10 mm, and 5 supporting ribs with a thickness of 6 mm are also provided inside the channel steel structure of clamp 2. The diameter of the first connecting rod 41 is 7 mm, and the length is 162 mm. The diameter of the second connecting rod 42 is 14 mm, and the length is 390 mm. The rubber pad has a length of 210 mm, a height of 6 mm, and a width of 40 mm. Among them, the steel plate of the upper and lower distributed second pad block component 52, located in the middle position of the upper and lower yokes of core 1, has a length of 310 mm, a height of 20 mm, and a width of 40 mm. The steel plate in the first pad component 51, located in the middle of the upper and lower yokes of the iron core 1, has a length of 210mm, a height of 4mm, and a width of 40mm.

[0081] In addition, the irregular structure that perfectly matches the outer contour (including corners and edges) of the core 1 with the flow channel plate 3 reduces the volume by 40%-45% compared to the rectangular heat sink of the traditional air-cooled system. At the same time, it eliminates redundant space occupation, saves installation space, and meets the compact requirements of high power density transformers.

[0082] The flow channel plate 3 employs high-precision stamping technology to ensure a gapless contact with the surface of the iron core 1, increasing the heat dissipation contact area to over 95%. This avoids localized heat dissipation failures caused by oil channel blockage at corners in oil-cooling solutions, thus improving operational reliability. Combined with flow rate control, the temperature difference on the surface of the iron core 1 is controlled, preventing the formation of localized hot spots and extending the lifespan of the insulation material.

[0083] The closed cooling system is unaffected by dust, salt spray, and other environmental factors. It maintains stable heat dissipation performance even in high-temperature, high-humidity, and dusty environments. It eliminates the need for regular oil changes or cleaning of the air-cooled filter, reducing maintenance costs. It is suitable for scenarios with limited maintenance conditions, such as mines and offshore platforms.

[0084] The side interface flow channel 30 adopts a quick-connect interface, which supports "blind plugging" with external pipelines, improving assembly convenience.

[0085] The thermal conductivity of the iron core 1 exhibits anisotropic characteristics due to the manufacturing process. The thermal conductivity of the front and rear surfaces is 8-10 times that of the inner and outer surfaces. By tightly attaching the flow channel plate 3 to the front and rear sides of the iron core 1, the cooling medium can conduct heat out more quickly through the direct current channel in the flow channel plate 3, thereby greatly improving the heat dissipation efficiency.

[0086] 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 core cooling system, comprising a core cooling structure, the core cooling structure comprising a core (1), a flow channel plate (3), and a clamping assembly; wherein, in the thickness direction of the core (1), the clamping assembly clamps the flow channel plate (3) so that the flow channel plate (3) is abutted and fixed against the side wall of the core (1), characterized in that, The main body structure of the flow channel plate (3) includes a rectangular ring body, a DC channel distributed along the four sides of the rectangular ring body, and four interface channels (30). The four interface channels (30) are all connected to the DC channel, and the four interface channels (30) are located at the four corners of the rectangular ring body. Among them, two interface channels (30) located at a set of diagonal positions of the rectangular ring body are used for the inflow of cooling medium, and two interface channels (30) located at another set of diagonal positions of the rectangular ring body are used for the outflow of cooling medium. The DC channel includes two sets of first DC channels (31) and two sets of second DC channels (32). Each interface channel (30) is connected to the first DC channel (31) and the second DC channel (32) adjacent to each other. Each interface channel (30) is also provided with a splitter (301) for distributing the flow rate entering the first DC channel (31) and the second DC channel (32). The layout structure of the flow channel plate (3) includes a first flow channel plate (3a) and a second flow channel plate (3b), the first flow channel plate (3a) and the second flow channel plate (3b) respectively abut against the two side walls of the iron core (1); the four interface flow channels (30) are respectively arranged opposite to the four corner areas of the iron core (1); The core cooling system also includes a first flow path and a second flow path; The first flow channel plate (3a) includes a first interface flow channel (3a1), a second interface flow channel (3a2), a third interface flow channel (3a3), and a fourth interface flow channel (3a4). The second flow channel plate (3b) includes a fifth interface flow channel (3b1), a sixth interface flow channel (3b2), a seventh interface flow channel (3b3), and an eighth interface flow channel (3b4). In the thickness direction of the iron core (1), the first interface flow channel (3a1) and the fifth interface flow channel (3b1) are symmetrically distributed on both sides of the iron core (1), the second interface flow channel (3a2) and the sixth interface flow channel (3b2) are symmetrically distributed on both sides of the iron core (1), the third interface flow channel (3a3) and the seventh interface flow channel (3b3) are symmetrically distributed on both sides of the iron core (1), and the fourth interface flow channel (3a4) and the eighth interface flow channel (3b4) are symmetrically distributed on both sides of the iron core (1); The first interface channel (3a1), the third interface channel (3a3), the sixth interface channel (3b2), and the eighth interface channel (3b4) are all connected to the first flow path; The second interface channel (3a2), the fourth interface channel (3a4), the fifth interface channel (3b1), and the seventh interface channel (3b3) are all connected to the second flow path; The core cooling system also includes a reversing valve (6), which includes two pairs of inlet and outlet valve ports. One pair of inlet and outlet valve ports of the reversing valve (6) is connected to the first flow path and the second flow path, respectively, and the other pair of inlet and outlet valve ports of the reversing valve (6) is used for the inflow and outflow of the cooling medium, respectively.

2. The core cooling system according to claim 1, characterized in that, The flow channel plate (3) also includes a third flow channel plate (3c), which is located between the laminations of the iron core (1).

3. The core cooling system according to claim 1, characterized in that, The clamping assembly includes two sets of clamps (2) and multiple first connecting rods (41). The two sets of clamps (2) are respectively installed on the iron yokes at both ends of the iron core (1). Each set of clamps (2) consists of two clamps. The two ends of the first connecting rods (41) are respectively connected to the two clamps (2) to fasten the flow channel plate (3) to the side wall of the iron core (1).

4. The core cooling system according to claim 3, characterized in that, The clamping assembly also includes a plurality of second connecting rods (42), the two ends of which are fixedly connected to each set of clamps (2).

5. The core cooling system according to claim 1, characterized in that, The first flow path is provided with a first three-way pipe (71), a second three-way pipe (72) and a third three-way pipe (73); One port of the first three-way pipe (71) is connected to one of the two inlet and outlet ports of the reversing valve (6), and the other two ports of the first three-way pipe (71) are connected to one port of the second three-way pipe (72) and one port of the third three-way pipe (73), respectively. The other two ports of the second three-way pipe (72) are respectively connected to the first interface channel (3a1) and the sixth interface channel (3b2); The other two ports of the third tee pipe (73) are connected to the third interface channel (3a3) and the eighth interface channel (3b4), respectively.

6. The core cooling system according to claim 5, characterized in that, The second flow path is provided with a fourth three-way pipe (81), a fifth three-way pipe (82) and a sixth three-way pipe (83); One port of the fourth three-way pipe (81) is connected to the other port of one of the pair of inlet and outlet valve ports in the reversing valve (6), and the other two ports of the fourth three-way pipe (81) are connected to one port of the fifth three-way pipe (82) and one port of the sixth three-way pipe (83), respectively. The other two ports of the fifth tee pipe (82) are respectively connected to the second interface channel (3a2) and the fifth interface channel (3b1); The other two ports of the sixth tee pipe (83) are connected to the fourth interface channel (3a4) and the seventh interface channel (3b3), respectively.

7. A control method for a core cooling system according to claim 1, characterized in that, The reversing valve (6) performs a reversing operation based on a set interval.

8. A transformer, characterized in that, Includes the core cooling system according to any one of claims 1-6.

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