A segmented transformer
By designing the air duct structure and sealing parts in a segmented transformer, the problem of excessive temperature between adjacent windings is solved, the transformer temperature is effectively reduced, failure is avoided, and the development of larger capacity is promoted.
Patent Information
- Application Number
- CN202421326110.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-11
AI Technical Summary
In segmented windings, the air path design is not good enough to cause the temperature between adjacent windings at the end of the transformer to be high, which can easily lead to the failure of the transformer, limiting the development of the transformer to a larger capacity.
A segmented transformer is designed, including an iron core, a air guide tube, a sealing member and multiple sets of winding coils. By circulating cold air in the air guide tube and setting a sealing member in a preset direction to increase the air volume in the second air duct in the last set of winding coils, the temperature between adjacent windings is effectively reduced.
By designing the air duct structure and sealing parts in a segmented transformer, the temperature between adjacent windings at the end of the transformer is successfully reduced, transformer failure is avoided, and the greater development of transformer capacity is promoted.
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Figure CN222734775U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of transformers, and in particular to a segmented transformer. Background Art
[0002] As wind turbines enter the large megawatt (≥10MW) era, the capacity and size of dry-type transformers have also increased. Due to the production restrictions on the winding height in large-capacity dry-type transformers, the application of segmented windings has increased in high-size transformers.
[0003] If the air path design in the segmented winding is not good enough, the high temperature between adjacent windings at the end of the transformer can easily lead to transformer failure, seriously restricting the development of the transformer to a larger capacity. Utility Model Content
[0004] Objects of the present application include, for example, providing a segmented transformer that facilitates reducing the temperature between adjacent windings at the end of the transformer to prevent transformer failure.
[0005] This application can be implemented as follows:
[0006] The present application provides a segmented transformer, which includes an iron core, an air duct, a blocking member, and a plurality of groups of winding coils, wherein the plurality of groups of winding coils are arranged at intervals in the length direction of the iron core, each group of the winding coils includes a first winding coil and a second winding coil, and the iron core, the first winding coil, the second winding coil, and the air duct are arranged in sequence from the inside to the outside;
[0007] For each group of the winding coils, a first air duct is formed between the first winding coil and the iron core, a second air duct is formed between the first winding coil and the second winding coil, and a third air duct is formed between the second winding coil and the air guide cylinder;
[0008] The air guide tube is used for circulating cold air along a preset direction. The blocking member is arranged in the air guide tube. In the preset direction, the blocking member is at least used for increasing the air volume in the second air duct in the last group of winding coils.
[0009] Optionally, in two adjacent groups of the winding coils, the sealing member fits the outer walls of two adjacent second winding coils, and / or the sealing member is arranged on the inner wall of the air guide tube and has a gap between the second winding coils, and / or the sealing member is arranged between two adjacent first winding coils, and / or the sealing member is arranged between two adjacent second winding coils.
[0010] Optionally, the sealing member includes a first annular sealing member, which is arranged around the second winding coil, and the first annular sealing member is simultaneously attached to the outer side walls of two adjacent second winding coils.
[0011] Optionally, the sealing member includes a second annular sealing member, which is arranged around the second winding coil, and the second annular sealing member is arranged on the inner wall of the air guide tube, and there is a gap between the second annular sealing member and the second winding coil.
[0012] Optionally, the sealing member includes a third annular sealing member, and the third annular sealing member is arranged between two adjacent first winding coils.
[0013] Optionally, the sealing member includes a fourth annular sealing member, and the fourth annular sealing member is arranged between two adjacent second winding coils.
[0014] The beneficial effects of the segmented transformer of the present application include, for example: in order to facilitate the reduction of the temperature between adjacent windings at the end of the transformer, a segmented transformer is designed, the segmented transformer includes an iron core, an air duct, a sealing member and multiple groups of winding coils, the multiple groups of winding coils are arranged at intervals in the length direction of the iron core, each group of winding coils includes a first winding coil and a second winding coil, the iron core, the first winding coil, the second winding coil, and the air duct are arranged in sequence from the inside to the outside; for each group of winding coils, a first air duct is formed between the first winding coil and the iron core, a second air duct is formed between the first winding coil and the second winding coil, and a third air duct is formed between the second winding coil and the air duct; the air duct is used to circulate cold air along a preset direction, the sealing member is arranged in the air duct, and in the preset direction, the sealing member is at least used to increase the air volume in the second air duct in the last group of winding coils.
[0015] When cold air flows in the air duct along a preset direction, the cold air will flow in the first air duct, the second air duct and the third air duct in each group of winding coils. In the preset direction, the blocking piece can at least increase the air volume in the second air duct in the last group of winding coils, thereby effectively reducing the temperature between the first winding coil and the second winding coil at the end of the transformer to prevent transformer failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 is a schematic diagram of a segmented transformer in an optional embodiment;
[0018] Figure 2 is a schematic diagram of a segmented transformer in an optional embodiment;
[0019] Figure 3 is a schematic diagram of a segmented transformer in an optional embodiment;
[0020] Figure 4 is a schematic diagram of a segmented transformer in an optional embodiment;
[0021] Figure 5 is a schematic diagram of a segmented transformer in an optional embodiment;
[0022] Figure 6 is a schematic diagram of a segmented transformer in an optional embodiment;
[0023] Figure 7 is a schematic diagram of a segmented transformer in an optional embodiment;
[0024] Figure 8 is a schematic diagram of a segmented transformer in an optional embodiment;
[0025] Fig. 9 is a schematic diagram of a segmented transformer in an optional embodiment;
[0026] Fig.10 is a schematic diagram of a segmented transformer in an optional embodiment;
[0027] Fig.11 Schematic diagram of a segmented transformer in an optional embodiment.
[0028] Icons: 1-iron core; 2-air guide tube; 3-first winding coil; 4-second winding coil; 5-first air duct; 6-second air duct; 7-third air duct; 8-first annular sealing piece; 9-second annular sealing piece; 10-third annular sealing piece; 11-fourth annular sealing piece. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.
[0035] Please refer to Figure 1-Figure 4 The embodiment of the present application provides a segmented transformer, including an iron core 1, an air duct 2, a blocking piece and multiple groups of winding coils, the multiple groups of winding coils are arranged at intervals in the length direction of the iron core 1, each group of winding coils includes a first winding coil 3 and a second winding coil 4, the iron core 1, the first winding coil 3, the second winding coil 4, and the air duct 2 are arranged in sequence from the inside to the outside; for each group of winding coils, a first air duct 5 is formed between the first winding coil 3 and the iron core 1, a second air duct 6 is formed between the first winding coil 3 and the second winding coil 4, and a third air duct 7 is formed between the second winding coil 4 and the air duct 2; the air duct 2 is used to circulate cold air along a preset direction, the blocking piece is arranged in the air duct 2, and in the preset direction, the blocking piece is at least used to increase the air volume in the second air duct 6 in the last group of winding coils.
[0036] In two adjacent groups of winding coils, two first air ducts 5, two second air ducts 6 and two third air ducts 7 are arranged opposite to each other, and intervals are arranged between the two first air ducts 5, between the two second air ducts 6 and between the two third air ducts 7. The arrow direction in the figure is a preset direction, and the cold air can be provided by an external cooling device.
[0037] When cold air flows in the air duct 2 along a preset direction, the cold air will flow in the first air duct 5, the second air duct 6 and the third air duct 7. In the preset direction, the blocking piece can at least increase the air volume in the second air duct 6 in the last group of winding coils, thereby effectively reducing the temperature between the first winding coil 3 and the second winding coil 4 at the end of the transformer to prevent the transformer from failing.
[0038] In two adjacent groups of winding coils, the sealing piece is attached to the outer walls of two adjacent second winding coils 4, and / or the sealing piece is arranged on the inner wall of the air guide tube 2 and has a gap between the second winding coils 4, and / or the sealing piece is arranged between two adjacent first winding coils 3, and / or the sealing piece is arranged between two adjacent second winding coils 4.
[0039] When the blocking piece fits the outer wall of two adjacent second winding coils 4, the blocking piece can prevent the cold air in the previous second air duct 6 from flowing to the subsequent third air duct 7 in a preset direction; when the blocking piece is arranged on the inner wall of the air guide tube 2 and there is a gap between the blocking piece and the second winding coil 4, the blocking piece can guide part of the cold air in the previous third air duct 7 to the subsequent second air duct 6 in a preset direction; when the blocking piece is arranged between two adjacent first winding coils 3, the blocking piece can prevent the cold air in the previous second air duct 6 from flowing to the subsequent first air duct 5 in a preset direction; when the blocking piece is arranged between two adjacent second winding coils 4, the blocking piece can prevent the cold air in the previous second air duct 6 from flowing to the subsequent third air duct 7 in a preset direction.
[0040] The above four situations all ensure the cold air flow in the second air duct 6 of the latter two adjacent groups of winding coils, and effectively reduce the temperature between the first winding coil 3 and the second winding coil 4 in the second group of winding coils and subsequent winding coils in the preset direction.
[0041] If it is only necessary to lower the temperature between the first winding coil 3 and the second winding coil 4 in the last group of winding coils, it is only necessary to fit the sealing piece to the outer walls of the two adjacent second winding coils 4 in the last two adjacent groups of winding coils, and / or, set the sealing piece on the inner wall of the air guide tube 2 with a gap between the second winding coil 4, and / or, set the sealing piece between the two adjacent first winding coils 3, and / or, set the sealing piece between the two adjacent second winding coils 4.
[0042] In an optional embodiment, the sealing member includes a first annular sealing member 8 , which is disposed around the second winding coil 4 , and the first annular sealing member 8 is simultaneously attached to the outer side walls of two adjacent second winding coils 4 .
[0043] When the first annular sealing member 8 is simultaneously in contact with the outer walls of two adjacent second winding coils 4, the first annular sealing member 8 can prevent the cold air in the previous second air duct 6 from flowing to the subsequent third air duct 7, thereby ensuring the cold air flow in the subsequent second air duct 6, and thereby effectively reducing the temperature between the first winding coil 3 and the second winding coil 4 corresponding to the second air duct 6.
[0044] The first annular sealing member 8 is bonded and fixed to the second winding coil 4. In other embodiments, the first annular sealing member 8 and the second winding coil 4 may be fixed by other means, as long as the first annular sealing member 8 can be stably connected to the second winding coil 4.
[0045] In an optional embodiment, the sealing member includes a second annular sealing member 9, which is arranged around the second winding coil 4, and the second annular sealing member 9 is arranged on the inner wall of the air guide tube 2, and there is a gap between the second annular sealing member 9 and the second winding coil 4.
[0046] The second annular blocking member 9 is located in the third air duct 7, and can achieve a throttling effect, so that part of the cold air in the previous third air duct 7 flows into the rear second air duct 6 through the gap between the front and rear third air ducts 7, thereby increasing the cold air flow in the rear second air duct 6, and thereby effectively reducing the temperature between the first winding coil 3 and the second winding coil 4 corresponding to the second air duct 6.
[0047] In an optional embodiment, the second annular sealing member 9 is bonded to or integrally formed with the air guide tube 2 .
[0048] When the materials of the second annular sealing member 9 and the air guide tube 2 are inconsistent, the second annular sealing member 9 is bonded to the air guide tube 2; when the materials of the second annular sealing member 9 and the air guide tube 2 are consistent, the second annular sealing member 9 and the air guide tube 2 are integrally formed.
[0049] In an optional embodiment, the sealing member includes a third annular sealing member 10 , and the third annular sealing member 10 is disposed between two adjacent first winding coils 3 .
[0050] The third annular sealing member 10 is arranged between two adjacent first winding coils 3 to seal the gap between the two adjacent first winding coils 3, thereby preventing the cold air in the previous second air duct 6 from flowing to the latter first air duct 5, ensuring the cold air flow in the latter second air duct 6, and effectively reducing the temperature between the first winding coil 3 and the second winding coil 4 corresponding to the second air duct 6.
[0051] In an optional embodiment, the sealing member includes a fourth annular sealing member 11 , and the fourth annular sealing member 11 is disposed between two adjacent second winding coils 4 .
[0052] The fourth annular sealing member 11 is arranged between two adjacent second winding coils 4 to seal the gap between the two adjacent second winding coils 4, thereby preventing the cold air in the previous second air duct 6 from flowing to the subsequent third air duct 7, thereby ensuring the cold air flow in the subsequent second air duct 6, and effectively reducing the temperature between the first winding coil 3 and the second winding coil 4 corresponding to the second air duct 6.
[0053] The third annular plugging member 10 is bonded to two adjacent first winding coils 3 at the same time, or the third annular plugging member 10 is pressed between two adjacent first winding coils 3 to plug the gap between the two adjacent first winding coils 3. The fourth annular plugging member 11 is bonded to two adjacent second winding coils 4 at the same time, or the fourth annular plugging member 11 is pressed between two adjacent second winding coils 4 to plug the gap between the two adjacent second winding coils 4.
[0054] It should be noted that the first annular sealing member 8 , the second annular sealing member 9 , the third annular sealing member 10 , and the fourth annular sealing member 11 can be used selectively or in combination with each other.
[0055] In some embodiments, please refer to Figure 5 The sealing piece includes a first annular sealing piece 8 and a second annular sealing piece 9. The first annular sealing piece 8 simultaneously fits the outer walls of two adjacent second winding coils 4, and the second annular sealing piece 9 is located in the third air duct 7. At this time, the first annular sealing piece 8 can prevent the cold air in the previous second air duct 6 from flowing to the next third air duct 7. At the same time, the setting of the second annular sealing piece 9 increases the pressure in the third air duct 7, so that more cold air flows into the previous second air duct 6, further increasing the air volume in the next second air duct 6.
[0056] In some embodiments, please refer to Figure 6 The sealing piece includes a first annular sealing piece 8 and a third annular sealing piece 10. The first annular sealing piece 8 fits the outer wall of two adjacent second winding coils 4 at the same time, and the third annular sealing piece 10 seals the gap between two adjacent first winding coils 3. At this time, the first annular sealing piece 8 can prevent the cold air in the previous second air duct 6 from flowing to the next third air duct 7. At the same time, the third annular sealing piece 10 can prevent the cold air in the previous second air duct 6 from flowing to the next first air duct 5, so that the cold air in the previous second air duct 6 can only flow into the next second air duct 6, thereby ensuring the air volume in the next second air duct 6.
[0057] In some embodiments, please refer to Figure 7The blocking piece includes a second annular blocking piece 9 and a third annular blocking piece 10. The second annular blocking piece 9 is located in the third air duct 7. The third annular blocking piece 10 blocks the gap between two adjacent first winding coils 3. At this time, the second annular blocking piece 9 allows part of the cold air in the previous third air duct 7 to flow into the subsequent second air duct 6 through the gap between the front and rear third air ducts 7. The third annular blocking piece 10 can prevent the cold air in the previous second air duct 6 from flowing to the subsequent first air duct 5, thereby ensuring the air volume in the subsequent second air duct 6.
[0058] In some embodiments, please refer to Figure 8 The blocking piece includes a second annular blocking piece 9 and a fourth annular blocking piece 11. The second annular blocking piece 9 is located in the third air duct 7, and the fourth annular blocking piece 11 blocks the gap between two adjacent second winding coils 4. At this time, the fourth annular blocking piece 11 can prevent the cold air in the previous second air duct 6 from flowing to the subsequent third air duct 7. At the same time, the setting of the second annular blocking piece 9 increases the pressure in the third air duct 7, so that more cold air flows into the previous second air duct 6, further increasing the air volume in the subsequent second air duct 6.
[0059] In some embodiments, please refer to Fig. 9 The sealing member includes a third annular sealing member 10 and a fourth annular sealing member 11. The third annular sealing member 10 seals the gap between two adjacent first winding coils 3, and the fourth annular sealing member 11 seals the gap between two adjacent second winding coils 4, so that the cold air in the previous second air duct 6 can only flow into the latter second air duct 6, thereby ensuring the air volume in the latter second air duct 6.
[0060] In some embodiments, please refer to Fig.10 The sealing piece includes a first annular sealing piece 8, a second annular sealing piece 9 and a third annular sealing piece 10. The first annular sealing piece 8 simultaneously fits the outer walls of two adjacent second winding coils 4. The second annular sealing piece 9 is located in the third air duct 7. The third annular sealing piece 10 seals the gap between the two adjacent first winding coils 3. At this time, the setting of the second annular sealing piece 9 increases the pressure in the third air duct 7, so that more cold air flows into the previous second air duct 6, and the cold air in the previous second air duct 6 can only flow into the next second air duct 6, thereby ensuring the air volume in the next second air duct 6.
[0061] In some embodiments, please refer to Fig.11The sealing member includes a second annular sealing member 9, a third annular sealing member 10 and a fourth annular sealing member 11. The second annular sealing member 9 is located in the third air duct 7. The third annular sealing member 10 seals the gap between two adjacent first winding coils 3. The fourth annular sealing member 11 seals the gap between two adjacent second winding coils 4. At this time, the setting of the second annular sealing member 9 increases the pressure in the third air duct 7, so that more cold air flows into the previous second air duct 6, and the cold air in the previous second air duct 6 can only flow into the next second air duct 6, thereby ensuring the air volume in the next second air duct 6.
[0062] In an optional embodiment, the blocking piece is made of an insulating and heat-resistant material, wherein the insulating and heat-resistant material is a resin material or an acrylic material.
[0063] Resin material or acrylic material has good insulation and heat resistance, therefore, resin material or acrylic material is used to make the sealing piece. Of course, in other embodiments, other materials with good insulation and heat resistance can also be used to make the sealing piece, and this is not limited.
[0064] In summary, the embodiment of the present application provides a segmented transformer. When cold air flows in the air duct 2, the cold air will flow in the first air duct 5, the second air duct 6 and the third air duct 7 in each group of winding coils. In a preset direction, the first annular blocking member 8 can prevent the cold air in the previous second air duct 6 from flowing to the next third air duct 7; the second annular blocking member 9 can make part of the cold air in the previous third air duct 7 flow into the next second air duct 6, or increase the pressure in the third air duct 7 so that more cold air flows into the previous second air duct 6; the third annular blocking member 9 can prevent the cold air in the previous third air duct 7 from flowing into the next ... The annular sealing member 10 can prevent the cold air in the previous second air duct 6 from flowing to the next first air duct 5; the fourth annular sealing member 11 can prevent the cold air in the previous second air duct 6 from flowing to the next third air duct 7; by selectively or in combination arranging the first annular sealing member 8, the second annular sealing member 9, the third annular sealing member 10 and the fourth annular sealing member 11 in two adjacent groups of winding coils, the temperature between the first winding coil 3 and the second winding coil 4 in the second group of winding coils and subsequent winding coils is effectively reduced to prevent transformer failure.
[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A segmented transformer, characterized in that: It comprises an iron core, an air guide tube, a blocking member and a plurality of groups of winding coils, wherein the plurality of groups of winding coils are arranged at intervals in the length direction of the iron core, each group of winding coils comprises a first winding coil and a second winding coil, and the iron core, the first winding coil, the second winding coil and the air guide tube are arranged in sequence from the inside to the outside; For each group of the winding coils, a first air duct is formed between the first winding coil and the iron core, a second air duct is formed between the first winding coil and the second winding coil, and a third air duct is formed between the second winding coil and the air guide cylinder; The air guide tube is used for circulating cold air along a preset direction. The blocking member is arranged in the air guide tube. In the preset direction, the blocking member is at least used for increasing the air volume in the second air duct in the last group of winding coils.
2. The segmented transformer according to claim 1, characterized in that: In two adjacent groups of the winding coils, the blocking member is in contact with the outer side walls of two adjacent second winding coils, and / or, The blocking member is arranged on the inner wall of the air guide tube and has a gap with the second winding coil, and / or, The blocking member is arranged between two adjacent first winding coils, and / or, The blocking member is arranged between two adjacent second winding coils.
3. The segmented transformer according to claim 2, characterized in that: The sealing member includes a first annular sealing member, which is disposed around the second winding coil, and the first annular sealing member is simultaneously attached to the outer side walls of two adjacent second winding coils.
4. The segmented transformer according to claim 3, characterized in that: The sealing member also includes a second annular sealing member, which is arranged around the second winding coil. The second annular sealing member is arranged on the inner wall of the air guide tube, and there is a gap between the second annular sealing member and the second winding coil.
5. The segmented transformer according to claim 3 or 4, characterized in that: The sealing member further includes a third annular sealing member, and the third annular sealing member is arranged between two adjacent first winding coils.
6. The segmented transformer according to claim 2, characterized in that: The sealing member includes a second annular sealing member, which is arranged around the second winding coil. The second annular sealing member is arranged on the inner wall of the air guide cylinder, and there is a gap between the second annular sealing member and the second winding coil.
7. The segmented transformer according to claim 6, characterized in that: The sealing member further includes a third annular sealing member, and the third annular sealing member is arranged between two adjacent first winding coils.
8. The segmented transformer according to claim 6 or 7, characterized in that: The sealing member further includes a fourth annular sealing member, and the fourth annular sealing member is arranged between two adjacent second winding coils.
9. The segmented transformer according to claim 2, characterized in that: The sealing member includes a third annular sealing member, and the third annular sealing member is arranged between two adjacent first winding coils.
10. The segmented transformer according to claim 2 or 9, characterized in that: The sealing member includes a fourth annular sealing member, and the fourth annular sealing member is arranged between two adjacent second winding coils.