Split type comb-shaped supporting strip structure of transformer

Abstract

The split type comb-shaped supporting strip structure comprises an insulating cylinder, comb-shaped supporting strips which are arranged in an annular mode are fixedly embedded in the outer surface of the insulating cylinder, the comb-shaped supporting strips are evenly distributed along the axis of the insulating cylinder, a spiral coil is arranged on the outer surface of the insulating cylinder in a sleeved mode, and the spiral coil is wound around the insulating cylinder. The spiral coil comprises a first wire cake, a second wire cake, a third wire cake and a fourth wire cake, the first wire cake, the second wire cake, the third wire cake and the fourth wire cake each internally comprise n single wires connected in parallel, and each part of comb-shaped strips of the comb-shaped supporting strip comprises a toothless part comb-shaped strip and a toothed part comb-shaped strip, and the comb-shaped supporting strip is embedded and bonded on the surface of the insulating cylinder. According to the utility model, the split-type supporting strips are adopted, and a part of comb-shaped strip double-helix winding structure is combined, so that the spatial position of a tapping outlet can be effectively compressed, the structure is more compact, the short-circuit impact resistance of the coil is improved, meanwhile, the winding is convenient, the assembly is flexible, and the production efficiency can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of transformers, and in particular to a split comb-shaped support structure for a transformer. Background Technology

[0002] Currently, the existing transformer coil manufacturing process requires equal division outside the insulation cylinder before winding. That is, lines are drawn on the outer surface of the insulation cylinder to determine the position of the support bars. Then, the support bars are glued to this position, and then continuous winding is carried out. In order to improve the insulation effect of the coil, insulation needs to be added at the reinforcing cake and the last cake of each section. Then, there are two subsequent structures: (1) an integral structure in which the support bars are all of the same length as the insulation cylinder. In the position where the insulation needs to be strengthened, the support bar groove is narrow, so it is difficult to operate, the insulation effect is not good, and the efficiency is low. (2) a vertical flat tail support bar is used with a horizontal 2mm thick flat tail pad to support the coil one by one. This method is complicated to operate and takes a long time to produce. Each 2mm thick flat tail pad must be horizontally embedded into the vertical flat tail support bar in advance, and the coil is wound between the pads. Finally, high voltage insulation end rings must be pressed on the upper and lower ends of the transformer to compress the whole. Then the whole is impregnated with paint for curing. The operation is complicated. Therefore, we propose a split comb-shaped support bar structure for transformers to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a split comb-shaped support structure for a transformer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A split comb-shaped support structure for a transformer includes an insulating cylinder, on the outer surface of which comb-shaped support bars are fixedly embedded in a ring and are evenly distributed along the axis of the insulating cylinder. A spiral coil is sleeved on the outer surface of the insulating cylinder.

[0006] In a further embodiment, the spiral coil includes a first coil, a second coil, a third coil, and a fourth coil, each of which contains n parallel single conductors.

[0007] In a further embodiment, each portion of the comb-shaped support bar includes a toothless portion and a toothed portion.

[0008] In a further embodiment, the comb-shaped support strip is embedded and bonded to the surface of the insulating cylinder, or the comb-shaped support strip is fixed to the surface of the insulating cylinder by a support strip seat.

[0009] In a further embodiment, each of the comb-shaped support bars is composed of a first comb-shaped bar, a second comb-shaped bar, a third comb-shaped bar, and a fourth comb-shaped bar.

[0010] In a further embodiment, the outer end of the first comb strip is a toothless comb strip, and the right end is a comb strip with half a comb tooth. Both ends of the second comb strip are toothless comb strips. The third comb strip is adjacent to the second comb strip at one end with half a comb tooth and the other end with half a comb tooth. The middle part consists of multiple full-tooth comb strips. Both ends of the fourth comb strip are toothless comb strips.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This utility model adopts a split support bar combined with a partial comb-shaped double helix winding structure, which can effectively compress the space of the tap outlet, making the structure more compact and improving the coil's resistance to short-circuit impact. At the same time, it is easy to wind and flexible to assemble, which can effectively improve production efficiency and reduce manufacturing process difficulty. Furthermore, through structural improvements, the transformer can not only ensure the insulation distance, but also effectively improve the coil fill rate, reduce the inter-segment electric field strength, and make the electric field distribution inside the coil more uniform. The double helix winding structure can also ensure the consistency of the length of each coil, which can effectively reduce the circulating current loss inside the conductor, thus improving the overall product quality. Moreover, due to the use of split comb-shaped support bars, the manufacturing efficiency of the coil can be effectively improved, combining multiple advantages into one. Attached Figure Description

[0013] Figure 1 A schematic diagram of a coil structure made by continuous winding of traditional comb-shaped support bars.

[0014] Figure 2 This is a cross-sectional view of the split comb-shaped support bar of this utility model on the insulating cylinder.

[0015] Figure 3 This is a schematic diagram of the double-helix winding structure of the novel split comb-shaped support bar structure of this utility model.

[0016] Figure 4 This is a front view of an embodiment of the present invention, in which the split comb-shaped support bar is installed on an insulating cylinder.

[0017] Figure 5 This is a schematic diagram of the coil taps.

[0018] In the diagram: 1. Insulating cylinder; 2. Spiral coil; 3. Comb-shaped support bar; 4. Fourth coil; 5. First comb-shaped bar; 6. Second comb-shaped bar; 7. Third comb-shaped bar; 8. Fourth comb-shaped bar; 9. First coil; 10. Second coil; 11. Third coil. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] 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.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some comb-shaped strip embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 In this utility model, a split comb-shaped support bar structure for a transformer includes an insulating cylinder 1. The outer surface of the insulating cylinder 1 is fixedly inlaid with a ring-shaped comb-shaped support bar 3, which is evenly distributed along the axis of the insulating cylinder 1. A spiral coil 2 is sleeved on the outer surface of the insulating cylinder 1.

[0023] In a further embodiment, the spiral coil 2 includes a first coil 9, a second coil 10, a third coil 11, and a fourth coil 4. Each of the first coil 9, second coil 10, third coil 11, and fourth coil 4 includes n parallel single conductors. Specifically, the first coil 9 to the fourth coil 4 undergo a first transposition at 1 / 8n of the coil turns, transposing the single conductor 1 of the first coil 9 to the 7' conductor of the second coil 10. The first coil 9 to the fourth coil 4 undergo a second transposition at 1 / 4n of the coil turns. In step 1, the single conductor 1' of the first coil 9 is transposed to the 7' conductor of the second coil 10. The first coil 9 to the fourth coil 4 are transposed for the third time at 1 / 8n of the number of coil turns. The single conductor 1' of the fourth coil 4 is transposed to the 7' conductor of the third coil 11. The first coil 9 to the fourth coil 4 are transposed for the fourth time at 1 / 4n of the number of coil turns. The single conductor 1' of the first coil 9 is transposed to the 7' conductor of the third coil 11. All other coils are wound in the correct order, except that the beginning and end are reversed coils.

[0024] In a further embodiment, the comb-shaped support strip 3 is embedded and bonded to the surface of the insulating cylinder 1, or the comb-shaped support strip 3 is fixed to the surface of the insulating cylinder 1 by a support strip seat. Each comb-shaped support strip 3 is composed of a first part comb strip 5, a second part comb strip 6, a third part comb strip 7, and a fourth part comb strip 8. The outer end of the first part comb strip 5 is a toothless part comb strip, and the right end is a part comb strip with half a comb tooth. Both ends of the second part comb strip 6 are toothless parts comb strips. The third part comb strip 7 is adjacent to the second part comb strip 6 at one end and the other end is also a part comb strip with half a comb tooth. The middle part is composed of multiple full-tooth parts comb strips. Both ends of the fourth part comb strip 8 are toothless parts comb strips. Each part comb strip of the comb-shaped support strip 3 includes a toothless part comb strip and a toothed part comb strip. The position between the four parts comb-shaped support strip 3 is the position of the reinforcing disc. Each part comb-shaped support strip 3 is inserted into the groove on the surface of the insulating cylinder 1 in the required order.

[0025] The working principle of this utility model is as follows: the comb-shaped support bar 3 is divided into several comb-shaped bars, which can be installed or removed as needed. There is a gap for adding insulation between two adjacent comb-shaped support bars 3, which can be flexibly adjusted. First, the first part of the comb-shaped support bar 3 is installed. At this time, there is no obstruction on the side at the position of adding insulation, so it is very convenient to add insulation. After the insulation is added, the adjacent second part of the comb-shaped support bar 3 is installed on the insulating cylinder 1 until the installation is completed. This can reduce the processing cost of the support bar and improve labor efficiency. It solves the problem of difficulty in adding insulation to the comb-shaped support bar in the old method and the cumbersome structure of multiple flat tail pads embedded in the vertical flat tail support bar to form a multi-panel.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A split comb-shaped support structure for a transformer, characterized in that: It includes an insulating cylinder (1), on the outer surface of which are fixedly inlaid comb-shaped support bars (3) arranged in a ring. The comb-shaped support bars (3) are evenly distributed along the axis of the insulating cylinder (1), and a spiral coil (2) is sleeved on the outer surface of the insulating cylinder (1).

2. The split comb-shaped support structure of a transformer according to claim 1, characterized in that: The spiral coil (2) includes a first coil (9), a second coil (10), a third coil (11) and a fourth coil (4), each of which contains n parallel single wires.

3. The split comb-shaped support structure of a transformer according to claim 1, characterized in that: Each part of the comb-shaped support bar (3) includes a toothless comb-shaped bar and a toothed comb-shaped bar.

4. The split comb-shaped support bar structure of a transformer according to claim 1, characterized in that: The comb-shaped support strip (3) is embedded and bonded to the surface of the insulating cylinder (1), or the comb-shaped support strip (3) is fixed to the surface of the insulating cylinder (1) by a support strip seat.

5. The split comb-shaped support bar structure of a transformer according to claim 1, characterized in that: Each of the comb-shaped support bars (3) is composed of a first comb-shaped bar (5), a second comb-shaped bar (6), a third comb-shaped bar (7), and a fourth comb-shaped bar (8).

6. The split comb-shaped support bar structure of a transformer according to claim 5, characterized in that: The outer end of the first comb strip (5) is a toothless comb strip, and the right end is a comb strip with half a comb tooth. Both ends of the second comb strip (6) are toothless comb strips. The third comb strip (7) is adjacent to the second comb strip (6) at one end and the other end is also a comb strip with half a comb tooth. There are multiple full-tooth comb strips in the middle. Both ends of the fourth comb strip (8) are toothless comb strips.

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