Body structure and transformer

Abstract

This utility model belongs to the field of transformer technology and discloses a transformer body structure and a transformer. The transformer body structure includes an iron core, a first inner insulating cylinder, a winding, a first outer insulating cylinder, multiple first supports, multiple second supports, and sealing components. The first inner insulating cylinder is sleeved on the iron core, and the winding is wound around the first inner insulating cylinder. The multiple first supports and multiple second supports are evenly spaced along the axial and circumferential directions of the iron core. The first supports are supported between the winding and the first inner insulating cylinder, forming a first gap between adjacent first supports along the axial direction of the iron core and a first oil passage between adjacent first supports along the circumferential direction of the iron core. The second supports are supported between the winding and the first outer insulating cylinder, forming a second gap between adjacent second supports along the axial direction of the iron core and a second oil passage between adjacent second supports along the circumferential direction of the iron core. The sealing components are used to seal the first oil passage and / or the second oil passage. This transformer body structure allows more oil to enter the winding, ensuring the heat dissipation capacity within the winding and guaranteeing the stable operation of the transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer body structure and a transformer. Background Technology

[0002] In recent years, with the continuous improvement of my country's power system, the capacity and voltage level of ultra-high voltage power transformers have also increased. Forced oil circulation, as an efficient cooling method, plays an indispensable role in large power transformers.

[0003] In existing technologies, forced oil circulation involves pressurizing transformer oil and introducing it into the inner oil channels of the coil from the lower end of the coil, ensuring the flow rate of the oil inside the winding to achieve effective heat dissipation. In existing transformer structures, support bars are installed between the winding and the core, and between the winding and the outer insulating paper tube. Multiple support bars are arranged in a matrix between the winding and the core, and between the winding and the outer insulating paper tube. However, there are gaps between the support bars. As the oil flows towards the inner oil channels of the coil, some oil enters these gaps, affecting the amount and flow rate of oil entering the winding, thus adversely impacting the heat dissipation capacity of the winding and the stable operation of the transformer. Utility Model Content

[0004] The purpose of this invention is to provide a body structure that forces more oil to enter the winding, ensuring the oil flow rate and heat dissipation capacity within the winding.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A vessel body structure, comprising:

[0007] Iron core;

[0008] A first inner insulating cylinder is fitted onto the iron core;

[0009] The winding is wound around the first inner insulating cylinder;

[0010] A first outer insulating sleeve is fitted onto the winding;

[0011] Multiple first support members are spaced apart along the axial and circumferential directions of the iron core and are supported between the winding and the first inner insulating cylinder. A first gap is formed between adjacent first support members along the axial direction of the iron core, and a first oil passage is formed between adjacent first support members along the circumferential direction of the iron core.

[0012] Multiple second supports are spaced apart along the axial and circumferential directions of the iron core and are supported between the winding and the first outer insulating cylinder. A second gap is formed between adjacent second supports along the axial direction of the iron core, and a second oil passage is formed between adjacent second supports along the circumferential direction of the iron core.

[0013] A sealing element is disposed within the first interval for sealing the first oil passage; and / or, is disposed within the second interval for sealing the second oil passage.

[0014] Preferably, the sealing element includes a sealing ring piece, which is bent and connected end to end within the first interval to form a closed loop; and / or, the sealing ring piece is bent and connected end to end within the second interval to form a closed loop.

[0015] Preferably, the sealing ring includes a flexible ring body and a tying band that runs through the flexible ring body, with the two ends of the tying band bent and connected.

[0016] Preferably, the flexible ring body comprises a corrugated tube, which is made of an insulating material.

[0017] Preferably, the cross-section of the flexible ring is circular, the diameter of the flexible ring is d, the dimension of the first interval along the radial direction of the iron core is d1, the dimension of the second interval along the radial direction of the iron core is d2, and d > d1 and d > d2.

[0018] Preferably, the flexible ring is provided with a plurality of grooves spaced apart along its length, and the two ends of the grooves are arranged to penetrate the flexible ring along the radial direction of the iron core. The grooves are used to allow gas to pass through when the flexible ring is located within the first interval, or to allow gas to pass through when the flexible ring is located within the second interval.

[0019] Preferably, the body structure further includes a guide assembly, which comprises a first inner corner ring, a second inner corner ring, a first outer corner ring, and a second outer corner ring; wherein,

[0020] The first inner corner ring is disposed between the first inner insulating cylinder and the first support member, the second inner corner ring is disposed between the first support member and the winding, the first outer corner ring is disposed between the first outer insulating cylinder and the second support member, and the second outer corner ring is disposed between the second support member and the winding.

[0021] An oil inlet is formed between the first inner corner ring and the first outer corner ring, and an oil passage is formed between the first inner corner ring, the second inner corner ring and the second outer corner ring. One end of the oil passage is connected to the oil inlet, and the other end is connected to the inner oil passage of the winding. The first oil passage is located closer to the iron core than the inner oil passage, and the second oil passage is located farther away from the iron core than the inner oil passage.

[0022] Preferably, the sealing element is provided in both the first and second intervals closest to the oil inlet.

[0023] Preferably, a second inner insulating cylinder is provided between the first support member and the winding, and a second outer insulating cylinder is provided between the winding and the second support member.

[0024] A transformer, comprising:

[0025] fuel tank and

[0026] The vessel body structure as described in any of the above claims is located inside the oil tank.

[0027] Beneficial effects:

[0028] The structure provided by this utility model includes multiple first supports spaced apart along the axial and circumferential directions of the iron core. These first supports are positioned between the winding and the first inner insulating cylinder. A first gap is formed between adjacent first supports along the axial direction of the iron core, and a first oil passage is formed between adjacent first supports along the circumferential direction of the iron core. Multiple second supports are also spaced apart along the axial and circumferential directions of the iron core. These second supports are positioned between the winding and the first outer insulating cylinder. A second gap is formed between adjacent second supports along the axial direction of the iron core, and a second oil passage is formed between adjacent second supports along the circumferential direction of the iron core. By providing sealing components, which can block the first oil passage when positioned within the first gap, and the second oil passage when positioned within the second gap, the structure effectively blocks both the first and second oil passages, preventing forced oil flow through them and allowing more oil to enter the winding, thus ensuring the oil flow rate within the winding.

[0029] The transformer provided by this utility model includes the above-mentioned body structure, allowing more oil to enter the windings, ensuring the oil flow rate and heat dissipation capacity within the windings, and guaranteeing the reliable and stable operation of the transformer. Attached Figure Description

[0030] Figure 1 This is a partial structural cross-sectional view of the vessel body structure provided by this utility model;

[0031] Figure 2 This is a cross-sectional view of another part of the structure of the vessel body provided by this utility model;

[0032] Figure 3 This is a cross-sectional view of another part of the structure of the vessel body provided by this utility model;

[0033] Figure 4 This is a cross-sectional schematic diagram of the body structure provided by this utility model;

[0034] Figure 5 This is a schematic diagram of the sealing strip provided by this utility model.

[0035] In the picture:

[0036] 11. Iron core; 12. Winding; 121. Inner support bar; 122. Outer support bar; 141. First inner insulating cylinder; 142. Second inner insulating cylinder; 143. First outer insulating cylinder; 144. Second outer insulating cylinder;

[0037] 201, First Spacing; 21, First Support Member; 211, First Support Bar; 2111, First Oil Passage;

[0038] 301, Second gap; 31, Second support member; 311, Second support bar; 3111, Second oil passage;

[0039] 4. Guide assembly; 401. Oil inlet; 402. Oil flow channel; 41. First inner corner ring; 42. Second inner corner ring; 43. First outer corner ring; 44. Second outer corner ring;

[0040] 5. Sealing ring; 51. Flexible ring; 511. Groove; 52. Tie band. Detailed Implementation

[0041] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] This embodiment provides a transformer. The transformer includes an oil tank and a core structure disposed within the oil tank. (Refer to...) Figures 1 to 5 As shown, the device structure includes an iron core 11, a first inner insulating cylinder 141, a winding 12, a first outer insulating cylinder 143, multiple first supports 21, multiple second supports 31, and a sealing component. The first inner insulating cylinder 141 is sleeved on the iron core 11; the winding 12 is wound around the first inner insulating cylinder 141; the first outer insulating cylinder 143 is sleeved on the winding 12; the multiple first supports 21 are spaced apart along the axial and circumferential directions of the iron core 11 and are supported between the winding 12 and the first inner insulating cylinder 141. A first gap 201 is formed between adjacent first supports along the axial direction of the iron core 11, and a first oil passage 2111 is formed between adjacent first supports along the circumferential direction of the iron core 11. Multiple second support members 31 are spaced apart along the axial and circumferential directions of the iron core 11 and are supported between the winding 12 and the first outer insulating cylinder 143. A second interval 301 is formed between adjacent second support members 31 along the axial direction of the iron core 11, and a second oil passage 3111 is formed between adjacent second support members 31 along the circumferential direction of the iron core 11. A sealing member is disposed in the first interval 201 to seal the first oil passage 2111; and / or, is disposed in the second interval 301 to seal the second oil passage 3111.

[0046] In this embodiment, the axial direction, radial direction, and direction of the core 11 are shown by the arrows in the attached drawings. By setting a sealing component, the sealing component can block the first oil passage 2111 when it is set in the first interval 201, and the sealing component can block the second oil passage 3111 when it is set in the second interval 301. This can block the first oil passage 2111 and the second oil passage 3111, preventing some of the forced oil from flowing through the first oil passage 2111 and the second oil passage 3111, allowing more oil to enter the winding 12, and ensuring the oil flow rate in the winding 12. The transformer provided in this embodiment includes the above-mentioned winding 12 assembly. More oil flows through the inner oil passage into the winding 12, ensuring the oil flow rate and heat dissipation capacity in the winding 12, and ensuring the reliable and stable operation of the transformer.

[0047] Specifically, the first support member 21 includes a plurality of first support bars 211 spaced apart along the circumference of the iron core 11. The first support bars 211 are supported between the winding 12 and the first inner insulating cylinder 141, and a first oil passage 2111 is formed between two adjacent first support bars 211. The second support member 31 includes a plurality of second support bars 311 spaced apart along the circumference of the iron core 11. The second support bars 311 are supported between the winding 12 and the first outer insulating cylinder 143, and a second oil passage 3111 is formed between two adjacent second support bars 311.

[0048] In this embodiment, the sealing element includes a sealing ring 5, which is bent and connected end-to-end within the first interval 201 to form a closed loop; and / or, the sealing ring 5 is bent and connected end-to-end within the second interval 301 to form a closed loop. Specifically, the sealing ring 5, bent and connected end-to-end within the first interval 201 to form a closed loop, can block all the first oil passages 2111 in the circumferential direction of the iron core 11, and the sealing ring 5, bent and connected end-to-end within the second interval 301 to form a closed loop, can block all the second oil passages 3111 in the circumferential direction of the iron core 11. The sealing ring 5 is made of a flexible material, can be bent into a ring, has a simple structure, and is easy to arrange.

[0049] Specifically, the sealing ring 5 includes a flexible ring 51 and a tie 52 passing through the flexible ring 51, with the two ends of the tie 52 bent and connected. Specifically, the two ends of the tie 52 are used to fasten the flexible ring 51 when it is arranged in a closed loop. By providing the tie 52, the flexible ring 51 can be fastened when it is arranged in a closed loop, keeping the flexible ring 51 in a closed loop state. When the tie 52 is closed into a circle and located within the first interval 201, it can block all the first oil passages 2111 of the plurality of first support bars 211 distributed circumferentially along the iron core 11; when located within the second interval 301, it can block all the second oil passages 3111 of the plurality of first support bars 211 distributed circumferentially along the iron core 11, thereby preventing oil from entering.

[0050] In some other alternative embodiments, the flexible ring 51 can also be provided with snap-fit ​​structures at both ends to achieve end engagement and maintain a closed loop state.

[0051] For example, the flexible ring 51 includes a corrugated tube, which is an insulating material. Specifically, the corrugated tube material can be paper, i.e., a corrugated paper tube.

[0052] Furthermore, the cross-section of the flexible ring 51 is circular, and the diameter of the flexible ring 51 is d. The dimension of the first interval 201 along the radial direction of the iron core 11 is d1, and the dimension of the second interval 301 along the radial direction of the iron core 11 is d2, where d > d1 and d > d2. With this configuration, when the flexible ring 51 is installed, it is compressed and deformed within the first interval 201 and the second interval 301, further sealing the first interval 201 and the second interval 301 and improving the sealing effect.

[0053] Furthermore, the flexible ring 51 is provided with a plurality of grooves 511 spaced apart along its length, with both ends of the grooves 511 extending radially through the flexible ring 51 along the iron core 11. The grooves 511 are used to allow gas to pass through the first interval 201 or the second interval 301, ensuring ventilation. Specifically, the plurality of grooves 511 are equally spaced at intervals L along the length of the flexible ring 51.

[0054] In this embodiment, the winding 12 assembly further includes a guide component 4, which includes a first inner corner ring 41, a second inner corner ring 42, a first outer corner ring 43, and a second outer corner ring 44. The first inner corner ring 41 is located between the first inner insulating cylinder 141 and the inner support component 2; the second inner corner ring 42 is located between the inner support component 2 and the winding 12; the first outer corner ring 43 is located between the first outer insulating cylinder 143 and the outer support component 3; and the second outer corner ring 44 is located between the outer support component 3 and the winding 12. An oil inlet 401 is formed between the first inner corner ring 41 and the first outer corner ring 43, and an oil passage 402 is formed between the first inner corner ring 41, the second inner corner ring 42, and the second outer corner ring 44. One end of the oil passage 402 is connected to the oil inlet 401, and the other end is connected to the inner oil passage of the winding 12. The first oil passage 2111 is located closer to the iron core 11 than the inner oil passage, and the second oil passage 3111 is located farther away from the iron core 11 than the inner oil passage. Specifically, the first inner corner ring 41 is inserted between the first support member 21 and the first inner insulating cylinder 141 on the side closest to the oil inlet 401, the second inner corner ring 42 is inserted between the first support member 21 and the winding 12 on the side closest to the oil inlet 401, the first outer corner ring 43 is inserted between the second support member 31 and the first outer insulating cylinder 143 on the side closest to the oil inlet 401, and the second outer corner ring 44 is inserted between the second support member 31 and the winding 12 on the side closest to the oil inlet 401.

[0055] Specifically, oil inlet 401 is located at... Figure 1 The diagram at point a is shown in the middle. Figure 1 Arrows b and c indicate the oil flow channel 402. Figure 1 In addition to the oil flow channel 402, arrows d and e indicate the directions corresponding to the first oil channel 2111 and the second oil channel 3111. By setting sealing elements in the first interval 201 and the second interval 301, a dead oil zone is formed at the lower end of the sealing elements, blocking the oil flow at points d and e. This allows the oil flow to enter the inner oil channel of winding 12 in the ideal abc direction. At this time, due to the reduction of oil circuit diversion, the oil flow rate at point c is greatly increased, which greatly increases the transformer oil flow velocity at the inlet of the inner oil channel of winding 12, improves the heat dissipation capacity of winding 12, and ensures the normal operation of the transformer.

[0056] In this embodiment, sealing elements are provided in both the first interval 201 and the second interval 301 on the side closest to the oil inlet 401. Specifically, in order to save costs while ensuring the sealing effect, sealing elements are only provided in the first interval 201 and the second interval 301 on the side closest to the oil inlet 401.

[0057] In this embodiment, a second inner insulating cylinder 142 is provided between the inner support assembly 2 and the winding 12, and a second outer insulating cylinder 144 is provided between the winding 12 and the outer support assembly 3. Specifically, a first inner corner ring 41 is provided between the first inner insulating cylinder 141 and the inner support assembly 2, a second inner corner ring 42 is provided between the inner support assembly 2 and the second inner insulating cylinder 142, a first outer corner ring 43 is provided between the first outer insulating cylinder 143 and the outer support assembly 3, and a second outer corner ring 44 is provided between the outer support assembly 3 and the second outer insulating cylinder 144.

[0058] Furthermore, an inner support bar 121 is provided between the winding 12 and the second inner insulating cylinder 142, and an outer support bar 122 is provided between the winding 12 and the second outer insulating cylinder 144. The inner support bar 121 and the outer support bar 122 can provide reliable and stable support for both sides of the winding 12.

[0059] It is worth mentioning that the first support member 21 can support one or more rings on the outside of the first inner insulating cylinder 141, and the first support member 21 of adjacent rings can be separated by a middle inner insulating cylinder (not shown). The second support member 31 can support one or more rings on the outside of the winding 12, and the second support member 31 of adjacent rings can be separated by a middle outer insulating cylinder (not shown).

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vessel body structure, characterized in that, include: Iron core (11); The first inner insulating cylinder (141) is sleeved on the iron core (11). The winding (12) is wound around the first inner insulating cylinder (141). The first outer insulating cylinder (143) is sleeved on the winding (12). Multiple first support members (21) are spaced apart along the axial and circumferential directions of the iron core (11) and supported between the winding (12) and the first inner insulating cylinder (141). A first gap (201) is formed between adjacent first support members along the axial direction of the iron core (11), and a first oil passage (2111) is formed between adjacent first support members along the circumferential direction of the iron core (11). Multiple second supports (31) are spaced apart along the axial and circumferential directions of the iron core (11) and are supported between the winding (12) and the first outer insulating cylinder (143). A second gap (301) is formed between adjacent second supports (31) along the axial direction of the iron core (11), and a second oil passage (3111) is formed between adjacent second supports (31) along the circumferential direction of the iron core (11). A sealing element is disposed in the first interval (201) for sealing the first oil passage (2111); and / or, is disposed in the second interval (301) for sealing the second oil passage (3111).

2. The vessel body structure according to claim 1, characterized in that, The sealing component includes a sealing ring (5), which is disposed within the first interval (201) and bent at both ends to form a closed loop; and / or, the sealing ring (5) is disposed within the second interval (301) and bent at both ends to form a closed loop.

3. The vessel body structure according to claim 2, characterized in that, The sealing ring (5) includes a flexible ring (51) and a tying band (52) that runs through the flexible ring (51), with the two ends of the tying band (52) bent and connected.

4. The vessel body structure according to claim 3, characterized in that, The flexible ring (51) includes a corrugated tube, which is made of insulating material.

5. The vessel body structure according to claim 3, characterized in that, The cross-section of the flexible ring (51) is circular, the diameter of the flexible ring (51) is d, the dimension of the first interval (201) along the radial direction of the iron core (11) is d1, the dimension of the second interval (301) along the radial direction of the iron core (11) is d2, d>d1 and d>d2.

6. The vessel body structure according to claim 3, characterized in that, The flexible ring (51) is provided with a plurality of grooves (511) spaced apart along its own length. The two ends of the grooves (511) are arranged to penetrate the flexible ring (51) radially along the iron core (11). The grooves (511) are used to allow gas to pass through when the flexible ring (51) is located in the first interval (201), or to allow gas to pass through when the flexible ring (51) is located in the second interval (301).

7. The vessel body structure according to claim 2, characterized in that, The vessel body structure also includes a guide assembly (4), which includes a first inner corner ring (41), a second inner corner ring (42), a first outer corner ring (43), and a second outer corner ring (44); wherein, The first inner corner ring (41) is disposed between the first inner insulating cylinder (141) and the first support member (21), the second inner corner ring (42) is disposed between the first support member (21) and the winding (12), the first outer corner ring (43) is disposed between the first outer insulating cylinder (143) and the second support member (31), and the second outer corner ring (44) is disposed between the second support member (31) and the winding (12); An oil inlet (401) is formed between the first inner corner ring (41) and the first outer corner ring (43). An oil passage (402) is formed between the first inner corner ring (41), the second inner corner ring (42), and the second outer corner ring (44). One end of the oil passage (402) is connected to the oil inlet (401), and the other end is connected to the inner oil passage of the winding (12). The first oil passage (2111) is located closer to the iron core (11) than the inner oil passage, and the second oil passage (3111) is located farther away from the iron core (11) than the inner oil passage.

8. The vessel body structure according to claim 7, characterized in that, The sealing element is provided in both the first interval (201) and the second interval (301) closest to the oil inlet (401).

9. The vessel body structure according to claim 1, characterized in that, A second inner insulating cylinder (142) is provided between the first support member (21) and the winding (12), and a second outer insulating cylinder (144) is provided between the winding (12) and the second support member (31).

10. A transformer, characterized in that, include: The fuel tank and the vessel body structure as described in any one of claims 1-9, wherein the vessel body structure is disposed within the fuel tank.

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