Transformer winding and transformer
By using a combined structure of insulating cylinder, insulating ring and insulating belt in amorphous alloy three-dimensional coil core transformer, the problem of difficulty in fixing coils and high cost of paint brushing and impregnation due to the suspension of the core is solved, and more efficient and stable transformer winding assembly and short-circuit resistance are achieved.
Patent Information
- Application Number
- CN202422289322.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-18
AI Technical Summary
During the production process of the existing amorphous alloy three-dimensional coil core transformer, the suspended iron core is difficult to fix the coil, and the traditional paint-impregnated treatment cost is high and the efficiency is low, which affects the transformer's short-circuit resistance and no-load performance.
The combined structure of insulating cylinder, insulating ring and insulating belt is adopted. The upper pad, coil, lower pad and insulating ring are tied to the insulating tube by winding the insulating belt to enhance the structural stability of the transformer winding, simplify the assembly process, and avoid the treatment of paint-impregnated glue.
It improves the short-circuit resistance of the transformer winding, reduces costs, simplifies the assembly process, improves working efficiency, and maintains good no-load performance.
Smart Images
Figure CN223092677U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a transformer winding and a transformer. Background Art
[0002] As a kind of transformer, the amorphous alloy three-dimensional wound core transformer adopts an amorphous strip three-dimensional winding structure. There is no air gap in the magnetic circuit of the core, the winding is tighter, and the three-phase magnetic circuits are symmetrical. Therefore, it has good no-load performance. The no-load loss is very low, about 50% lower than that of the traditional silicon steel core transformer, the no-load current drops by about 80%, the noise is reduced by 7 dB, the heat generation is less, and the temperature rise is low, which meets the concept of green development and the requirements of energy conservation and emission reduction. It is an ideal product for the upgrading and energy-saving transformation of traditional transformers.
[0003] Due to the characteristics of the amorphous alloy material, the core of the amorphous three-dimensional wound core transformer cannot be used as the transformer skeleton to bear external forces such as clamp clamping force and its own gravity, so that the core must be suspended. Especially for a 35 kV large-capacity amorphous alloy three-dimensional wound core transformer, the self-weight of the core reaches several tons, and the influence of the core force on the performance is particularly significant. Therefore, the amorphous alloy three-dimensional wound core transformer needs to fully consider that the core is not stressed while meeting the requirements of coil fixing and pressing, so as to ensure the short-circuit resistance ability of the transformer and the performance requirements such as no-load loss, no-load current and noise of the amorphous alloy three-dimensional wound core.
[0004] In the traditional manufacturing method of transformers, in order to ensure that the transformer winding does not deform during short circuit and improve the mechanical strength and stability of the high-voltage winding and the low-voltage winding in the axial and radial directions, it is necessary to uniformly brush glue and dip the coil in paint, which has high cost and low work efficiency. Summary of the Utility Model
[0005] The main purpose of the utility model is to propose a transformer winding and a transformer, aiming to solve the technical problems of high cost and low work efficiency in the above-mentioned existing technology.
[0006] To achieve the above purpose, a transformer winding proposed by the utility model includes:
[0007] An insulating cylinder;
[0008] A coil, the coil is arranged around the outer peripheral side of the insulating cylinder;
[0009] Two insulating rings, the two insulating rings are respectively arranged at both ends of the coil along the axial direction of the insulating cylinder, and the two insulating rings are arranged around the outer peripheral side of the insulating cylinder. Two cushion blocks are respectively arranged on the sides of the two insulating rings facing away from the coil, and the two cushion blocks are respectively an upper cushion block and a lower cushion block;
[0010] A first insulating tape, which is a ring-shaped closed structure that is successively wound around the upper spacer, the outer wall of the coil, the lower spacer, and the inner wall of the insulating cylinder, so as to bind the upper spacer, the coil, the lower spacer, and the insulating ring to the insulating cylinder.
[0011] In one embodiment, a spacer group is provided on one side of each insulating ring facing away from the coil. The spacer group includes a plurality of the spacers that are circumferentially spaced apart along the insulating ring. The number of the upper spacers and the lower spacers is the same and they are arranged axially along the insulating cylinder in one-to-one correspondence. At least part of the upper spacers and their corresponding lower spacers are wound with the first insulating tape.
[0012] In one embodiment, in each spacer group, a plurality of the spacers are evenly circumferentially spaced apart along the insulating ring, and part of the spacers are first spacers, and the rest of the spacers are second spacers. The first spacers and the second spacers are alternately arranged circumferentially along the insulating ring, and the first insulating tape is wound on two corresponding first spacers axially along the insulating cylinder.
[0013] In one embodiment, a groove extending radially along the insulating cylinder is formed on one side of each first spacer facing away from the coil, and the first insulating tape wound on the first spacer is located in the groove.
[0014] In one embodiment, the coil includes:
[0015] A low-voltage winding, which is arranged around the outer peripheral side of the insulating cylinder. A plurality of support bars are spaced apart on the outer peripheral side of the low-voltage winding, and each support bar extends axially along the insulating cylinder;
[0016] A high-voltage winding, which is arranged around the outer peripheral side of the low-voltage winding, and the plurality of support bars form a plurality of channels between the high-voltage winding and the low-voltage winding;
[0017] Two insulating rings are respectively arranged at both axial ends of the low-voltage winding and the high-voltage winding along the insulating cylinder, and at least part of the two ends of the support bars are respectively provided with the upper spacer and the lower spacer.
[0018] In one embodiment, a second insulating tape is arranged around the outer peripheral side of the high-voltage winding.
[0019] In one embodiment, an air guide groove extending radially along the insulating cylinder is formed on one side of each spacer facing the insulating ring.
[0020] In one embodiment, a connection hole is formed on the insulating ring, and each spacer is fastened to the corresponding insulating ring through a fastener passing through the connection hole.
[0021] The present utility model also provides a transformer, which is characterized in that it includes an iron core and three transformer windings as described above. The iron core includes three core columns arranged in a triangle, and the three transformer windings are respectively sleeved on the three core columns.
[0022] In an embodiment, the transformer further includes a third insulating tape, and the third insulating tape is successively tied along the outer peripheral sides of the three transformer windings.
[0023] The technical solution of the present utility model uses a first insulating tape to tie the upper cushion block, the coil, the lower cushion block and the insulating ring on the insulating cylinder, thereby increasing the overall structural stability of the transformer winding, greatly enhancing the short-circuit resistance of the transformer winding, eliminating the need for brushing glue and dipping in paint, simplifying the assembly process of the transformer winding, making the assembly more convenient, with high working efficiency and lower cost. Description of the Drawings
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0025] Figure 1 Schematic structural diagram of an embodiment of the transformer winding provided by the present utility model;
[0026] Figure 2 Top view of an embodiment of the transformer winding provided by the present utility model;
[0027] Figure 3 Top view of the cushion block and the insulating ring of an embodiment of the transformer winding provided by the present utility model;
[0028] Figure 4 Front view of the cushion block and the insulating ring of an embodiment of the transformer winding provided by the present utility model;
[0029] Figure 5 Front view of the cushion block of an embodiment of the transformer winding provided by the present utility model;
[0030] Figure 6 Schematic structural diagram of an embodiment of the transformer provided by the present utility model.
[0031] Explanation of the reference numerals in the drawings:
[0032] 100. Transformer winding; 1. Insulating cylinder; 2. Coil; 21. Low-voltage winding; 22. High-voltage winding; 23. Spacer; 24. Channel; 3. Insulating ring; 31. Pad; 31a. Upper pad; 31b. Lower pad; 311. Groove; 312; Air guide groove; 313. Screw hole; 32. Connecting hole; 4. First insulating tape; 5. Second insulating tape;
[0033] 200. Transformer; 201. Third insulating tape.
[0034] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments
[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0037] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0038] The amorphous alloy three-dimensional wound core transformer adopts an amorphous strip three-dimensional winding structure. There is no air gap in the magnetic circuit of the core, the winding is tighter, the three-phase magnetic circuits are symmetrical, so the no-load performance is good. The no-load loss is very low, about 50% lower than that of traditional silicon steel core transformers, the no-load current drops by about 80%, the noise is reduced by 7 dB, the heat generation is less, and the temperature rise is low. It is an ideal product for the upgrading of traditional transformers and energy-saving transformation, and is the main force in implementing the energy efficiency improvement plan for distribution transformers.
[0039] However, due to the characteristics of the amorphous alloy material, in order to ensure the performance requirements such as no-load loss, no-load current and noise of the amorphous alloy three-dimensional wound core, the core of the amorphous three-dimensional wound core transformer cannot be used as the transformer skeleton to bear external forces such as clamp force and its own gravity, and the core must be suspended. Especially for 35 kV large-capacity amorphous alloy three-dimensional wound core products, the self-weight of the core reaches several tons, and the influence of the core stress on the performance is particularly significant. Therefore, the body structure of the amorphous three-dimensional wound core product needs to fully consider the reliability of coil fixation and pressing while the core is not stressed, and ensure the short-circuit resistance ability of the transformer.
[0040] In the traditional manufacturing method of short-circuit resistant oil-immersed transformers, in order to ensure that the transformer windings do not deform during short circuit and improve the mechanical strength and stability of the windings in the axial and radial directions, it is necessary to brush glue and impregnate paint on the ends of the high-voltage and low-voltage windings of the transformer and each layer of the windings, which has high cost, low work efficiency and quality hidden dangers.
[0041] The present utility model proposes a transformer winding 100.
[0042] Please refer to Figures 1-5 , in an embodiment of the present utility model, the transformer winding 100 includes an insulating cylinder 1, a coil 2, two insulating rings 3 and a first insulating tape 4; the coil 2 is arranged around the outer peripheral side of the insulating cylinder 1, the two insulating rings 3 are respectively arranged at both ends of the coil 2 along the axial direction of the insulating cylinder 1, and the two insulating rings 3 are arranged around the outer peripheral side of the insulating cylinder 1. Two cushion blocks 31 are respectively arranged on the sides of the two insulating rings 3 facing away from the coil 2, and the two cushion blocks 31 are respectively an upper cushion block 31a and a lower cushion block 31b; the first insulating tape 4 is an annular closed structure that is sequentially wound around the upper cushion block 31a, the outer wall of the coil 2, the lower cushion block 31b and the inner wall of the insulating cylinder 1 to bind the upper cushion block 31a, the coil 2, the lower cushion block 31b and the insulating ring 3 to the insulating cylinder 1.
[0043] It should be noted that when the transformer winding 100 suddenly short-circuits, a short-circuit electrodynamic force with extremely great destructiveness is generated. The short-circuit electrodynamic force includes tensile stress and compressive stress along the radial direction of the insulating cylinder 1 and axial force along the axial direction of the insulating cylinder 1, resulting in the easy deformation of the transformer winding 100.
[0044] In the technical solution of the present utility model, insulating rings 3 are provided at both ends of the coil 2 along the axial direction of the insulating cylinder 1, and cushion blocks 31 are provided on the sides of the insulating rings 3 facing away from the coil 2. The upper cushion block 31a and the lower cushion block 31b are mainly tied to both ends of the coil 2 by the first insulating tape 4 to restrict their axial movement, so as to resist the axial force generated when the transformer winding 100 suddenly short-circuits. Moreover, the first insulating tape 4 also winds around the outer wall of the coil 2 and the inner wall of the insulating cylinder 1 to form an annular closed structure, so that the upper cushion block 31a, the coil 2, the lower cushion block 31b and the insulating ring 3 are all tied to the insulating cylinder 1 to make the overall structure stable. Therefore, the first insulating tape 4 can also resist the tensile stress and compressive stress generated when the transformer winding 100 suddenly short-circuits to a certain extent.
[0045] It can be understood that by using the first insulating tape 4 to tie the upper cushion block 31a, the coil 2, the lower cushion block 31b and the insulating ring 3 to the insulating cylinder 1, the structural stability of the overall transformer winding 100 is increased, the short-circuit resistance ability of the transformer winding 100 is greatly enhanced, and the operation of tying the first insulating tape 4 is simple, without the need for glue brushing and dipping treatment, which simplifies the assembly process of the transformer winding 100, makes the assembly more convenient, has high work efficiency and lower cost.
[0046] Specifically, the first insulating tape 4 uses a polyester tape, and the polyester tape has good oil resistance, wear resistance and impact resistance, which can effectively improve the short-circuit resistance ability of the overall transformer winding 100.
[0047] It can be understood that the first insulating tape 4 winds around the upper cushion block 31a, the outer wall of the coil 2, the lower cushion block 31b and the inner wall of the insulating cylinder 1 in sequence for one or more turns to form an annular closed structure.
[0048] Specifically, the insulating cylinder 1 uses a formed insulating cylinder 1 made of epoxy fiberglass steel or epoxy glass cloth board material to improve the structural stability of the insulating cylinder 1 itself and can better resist the compressive stress when the transformer winding 100 is short-circuited.
[0049] In an embodiment, cushion block groups are provided on the sides of the insulating rings 3 facing away from the coil 2. The cushion block groups include a plurality of cushion blocks 31 spaced along the circumferential direction of the insulating ring 3. The number of the upper cushion blocks 31a and the lower cushion blocks 31b is the same and they are arranged in one-to-one correspondence along the axial direction of the insulating cylinder 1. At least part of the upper cushion blocks 31a and their corresponding lower cushion blocks 31b are wound with the first insulating tape 4.
[0050] Understandably, the insulating ring 3 is in a circular ring structure, covering the end faces of both ends of the coil 2 along the axial direction of the insulating cylinder 1. Each cushion block 31 is arranged on the insulating ring 3. The number of the upper cushion blocks 31a and the lower cushion blocks 31b is the same and they are arranged in one-to-one correspondence along the axial direction, which is more convenient for binding. By using the first insulating tape 4 to bind some corresponding upper cushion blocks 31a and lower cushion blocks 31b at both ends of the coil 2, the structure between the two insulating rings 3 and the coil 2 can be made more stable, so as to resist the axial force during a short circuit, save more costs and be more convenient for assembly.
[0051] In other embodiments, all the corresponding upper cushion blocks 31a and all the lower cushion blocks 31b can also be bound by the first insulating tape 4. It should be noted that each first insulating tape 4 binds one upper cushion block 31a and one corresponding lower cushion block 31b.
[0052] In one embodiment, in each cushion block group, multiple cushion blocks 31 are arranged at equal intervals along the circumferential direction of the insulating ring 3. And some of the cushion blocks 31 are the first cushion blocks 31, and the rest of the cushion blocks 31 are the second cushion blocks 31. The first cushion blocks 31 and the second cushion blocks 31 are arranged alternately along the circumferential direction of the insulating ring 3. The first insulating tape 4 is wound around two first cushion blocks 31 that are arranged corresponding to each other along the axial direction of the insulating cylinder 1.
[0053] It should be noted that each cushion block 31 is used to support between the external transformer yoke and the insulating ring 3.
[0054] Understandably, multiple cushion blocks 31 are arranged at equal intervals along the circumferential direction, so that the force distribution at the end of the coil 2 is uniform. The first cushion blocks 31 and the second cushion blocks 31 are arranged alternately along the circumferential direction, and the first insulating tape 4 is wound around the first cushion blocks 31, so that the first insulating tape 4 is also arranged at equal intervals along the circumferential direction. Thus, when a short circuit occurs in the transformer winding 100, the axial force conduction is uniform and easier to be offset, thereby improving the structural stability of the transformer winding 100.
[0055] Furthermore, the cushion block 31 is strip-shaped and is arranged on the insulating ring 3 along the radial direction of the insulating cylinder 1. The length of the cushion block 31 along the radial direction is equal to the thickness of the coil 2 along the radial direction, which can better achieve the purpose of resisting the axial force.
[0056] Preferably, 8 cushion blocks 31 are arranged at equal intervals of 360° along the circumferential direction, 4 of which are the first cushion blocks 31 and 4 of which are the second cushion blocks 31. That is, 4 first insulating tapes 4 are arranged at equal intervals of 360° along the circumferential direction.
[0057] As Figure 5 shown, in one embodiment, a groove 311 extending along the radial direction of the insulating cylinder 1 is formed on the side of each first cushion block 31 facing away from the coil 2, and the first insulating tape 4 wound around the first cushion block 31 is located in the groove 311.
[0058] Understandably, by providing a groove 311 in the first spacer 31, the first insulating tape 4 wound around the first spacer 31 can be more firmly located within the groove 311. This design not only improves the stability of the spacer 31 but also reduces the possibility of displacement of the first insulating tape 4 caused by the short-circuit electrodynamic force generated during a short circuit in the transformer winding 100.
[0059] Specifically, the notch of the groove 311 is located on the side of the spacer 31 facing away from the coil 2.
[0060] Further, the coil 2 includes a low-voltage winding 21 and a high-voltage winding 22. The low-voltage winding 21 is disposed around the outer peripheral side of the insulating cylinder 1, and a plurality of spacers 23 are spaced apart on the outer peripheral side of the low-voltage winding 21. Each spacer 23 extends along the axial direction of the insulating cylinder 1. The high-voltage winding 22 is disposed around the outer peripheral side of the low-voltage winding 21, and the plurality of spacers 23 form a plurality of channels 24 between the high-voltage winding 22 and the low-voltage winding 21. Two insulating rings 3 are respectively disposed at both ends of the low-voltage winding 21 and the high-voltage winding 22 along the axial direction of the insulating cylinder 1, and upper spacers 31a and lower spacers 31b are respectively disposed at both ends of at least some of the spacers 23.
[0061] Understandably, spacers 23 are provided between the low-voltage winding 21 and the high-voltage winding 22 to improve the overall structural stability of the coil 2. A plurality of channels 24 are formed between the high-voltage winding 22 and the low-voltage winding 21, and these channels 24 are used for oil circulation to achieve heat dissipation of the coil 2 and reduce noise. In one embodiment, each insulating ring 3 is also provided with an opening 32 corresponding to each channel 24. The openings 32 in the insulating ring 3 corresponding to each channel 24 are provided to avoid blocking the oil ducts. The upper spacers 31a and lower spacers 31b located at both ends of the spacers 23 also serve to prevent blocking of the oil ducts and deformation of the oil ducts, while ensuring the structural stability.
[0062] In one embodiment, a second insulating tape 5 is wound around the outer peripheral side of the high-voltage winding 22. Understandably, the second insulating tape 5 is wound around the outer peripheral side of the high-voltage winding 22 in the circumferential direction to counteract the tensile stress during a short circuit in the transformer winding 100. The second insulating tape 5 is wound around multiple circumferences in the circumferential direction, which provides a better effect of counteracting the tensile stress and is convenient for assembly with low cost.
[0063] Specifically, the second insulating tape 5 is a non-woven tape, which has excellent properties such as high strength, impact resistance, low elongation, no hysteresis, and no eddy current loss.
[0064] In one embodiment, a gas guide groove 312 extending in the radial direction of the insulating cylinder is provided on the side of each spacer 31 facing the insulating ring 3. Understandably, the gas guide groove 312 is mainly used to ensure that there is no air bubble accumulation at the spacer 31, facilitating smooth oil flow and effective heat dissipation.
[0065] Such as Figure 3 AndFigure 4 As shown, in one embodiment, a connection hole 32 is formed in the insulating ring 3, and each spacer 31 is connected to the insulating ring 3 through a fastener passing through the connection hole 32.
[0066] It can be understood that the spacer 31 is fastened to the corresponding insulating ring 3 through a fastener, and the structure is more stable, which can effectively prevent the spacer 31b from falling off or displacing under the action of short-circuit electrodynamic force. Moreover, this connection method also has the advantages of simple installation and convenient maintenance. The spacer 31 can be quickly installed or disassembled, and the assembly is convenient and the cost is low.
[0067] The fastener 313 can be a bolt in the prior art. The screw of the bolt passes through the screw hole 313 on the spacer 31 and is threadedly connected to the connection hole 32, so as to achieve a stable structure.
[0068] As Figure 6 shown, the present utility model also provides a transformer 200, which includes an iron core and three transformer windings 100. The specific structure of the transformer winding 100 refers to the above embodiment. Since this transformer adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the iron core includes three core columns arranged in a triangle, and the three transformer windings 100 are respectively sleeved on the three core columns.
[0069] Specifically, the three core columns are arranged in an equilateral triangle three-dimensional arrangement, and the insulating cylinder 1 is sleeved on the core columns.
[0070] Furthermore, the transformer 200 further includes a third insulating belt 201, and the third insulating belt 201 is sequentially tied along the outer peripheral sides of the three transformer windings 100.
[0071] It can be understood that by restraining the three-phase transformer winding 100 with the third insulating belt 201, the short-circuit electrodynamic force of the overall transformer in the radial direction can be further effectively offset or attenuated.
[0072] In one embodiment, there are three third insulating belts 201 arranged axially, and the three third insulating belts 201 are all sequentially wound around the outer peripheral sides of the three transformer windings 100 to form an annular closed structure, so as to offset and attenuate the overall external stress.
[0073] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A transformer winding, characterized in that, Comprising: Insulating cylinder; A coil, the coil being disposed around the outer peripheral side of the insulating cylinder; Two insulating rings, the two insulating rings being respectively disposed at two ends of the coil along the axial direction of the insulating cylinder, and the two insulating rings being disposed around the outer peripheral side of the insulating cylinder. Two cushion blocks are respectively disposed on one side of the two insulating rings facing away from the coil, and the two cushion blocks are respectively an upper cushion block and a lower cushion block; A first insulating tape, the first insulating tape being an annular closed structure that is sequentially wound around the outer wall of the upper cushion block, the outer wall of the coil, the lower cushion block, and the inner wall of the insulating cylinder to bind the upper cushion block, the coil, the lower cushion block, and the insulating ring to the insulating cylinder.
2. The transformer winding according to claim 1, wherein: A cushion block group is disposed on one side of each insulating ring facing away from the coil, and the cushion block group includes a plurality of the cushion blocks that are spaced apart along the circumferential direction of the insulating ring; The number of the upper cushion blocks and the lower cushion blocks is the same and they are arranged in one-to-one correspondence along the axial direction of the insulating cylinder, and at least part of the upper cushion blocks and their corresponding lower cushion blocks are wound with the first insulating tape.
3. The transformer winding according to claim 2, characterized in that, In each cushion block group, the plurality of cushion blocks are evenly spaced apart along the circumferential direction of the insulating ring, and part of the cushion blocks are first cushion blocks, and the rest of the cushion blocks are second cushion blocks. The first cushion blocks and the second cushion blocks are alternately arranged along the circumferential direction of the insulating ring, and the first insulating tape is wound on two first cushion blocks that are arranged in one-to-one correspondence along the axial direction of the insulating cylinder.
4. The transformer winding according to claim 3, wherein A groove extending in the radial direction of the insulating cylinder is formed on one side of each first cushion block facing away from the coil, and the first insulating tape wound on the first cushion block is located in the groove.
5. The transformer winding according to claim 1, wherein, The coil includes: A low-voltage winding, the low-voltage winding being disposed around the outer peripheral side of the insulating cylinder, and a plurality of support bars are spaced apart on the outer peripheral side of the low-voltage winding, and each support bar extends along the axial direction of the insulating cylinder; A high-voltage winding, the high-voltage winding being disposed around the outer peripheral side of the low-voltage winding, and the plurality of support bars form a channel between the high-voltage winding and the low-voltage winding; The two insulating rings are respectively disposed at two ends of the low-voltage winding and the high-voltage winding along the axial direction of the insulating cylinder, and at least part of the two ends of the support bars are respectively provided with the upper cushion block and the lower cushion block.
6. The transformer winding according to claim 5, wherein, A second insulating tape is disposed around the outer peripheral side of the high-voltage winding.
7. The transformer winding according to any one of claims 1 to 6, characterized in that A gas guiding groove extending in the radial direction of the insulating cylinder is formed on one side of each cushion block facing the insulating ring.
8. The transformer winding according to any one of claims 1 to 6, characterized in that, A connection hole is formed on the insulating ring, and each cushion block is fastened to the corresponding insulating ring through a fastener passing through the connection hole.
9. A transformer, characterized in that, Comprising an iron core and three transformer windings according to any one of claims 1 to 8, the iron core includes three core columns arranged in a triangle, and the three transformer windings are respectively sleeved on the three core columns.
10. The transformer according to claim 9, characterized in that, The transformer further includes a third insulating tape, and the third insulating tape is sequentially wound around the outer peripheral sides of the three transformer windings.