Winding body of high-voltage winding and high-voltage winding

Abstract

The utility model discloses a winding body of a high-voltage winding, the winding body comprises a plurality of winding plates, the plurality of winding plates are uniformly distributed along the circumferential direction of the winding body, and at least one gasket is arranged between two adjacent winding plates. The utility model further discloses the high-voltage winding. According to the winding body, the gaskets are arranged between the two adjacent winding plates, the inner side of the high-voltage coil can be stably supported, the situation that the high-voltage coil sinks inwards due to winding tension is avoided, and the winding quality of the high-voltage coil is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of power transformers, and in particular to a winding body of a high-voltage winding and a high-voltage winding. Background Art

[0002] At present, transformers can be divided into: oil-immersed transformers, dry-type transformers, and gas transformers. Dry-type transformers have the advantages of being oil-free, fireproof, long life, energy-saving and low noise, simple maintenance, safe and reliable. Most of the dry-type transformers on the market are resin-cast high-voltage winding dry-type transformers and open dry-type transformers. Although dry-type transformers have made great progress in the past 10 years, there are still problems such as insulation cracking, poor thermal conductivity, and harsh operating environment in operation.

[0003] At present, the high-voltage winding of dry-type transformers usually uses a rigid comb plate as a winding frame, and then the wire is wound on the winding frame to form a high-voltage coil, and then the high-voltage winding is formed by casting. The bottom of the rigid comb plate has a certain thickness, and the tension when winding the wire will cause the wire between two adjacent comb plates to sink and deform due to lack of support, affecting the quality of the high-voltage winding. Utility Model Content

[0004] In view of the shortcomings of the prior art, one of the purposes of the present application is to provide a winding body for a high-voltage winding, in which a gasket is arranged between two adjacent winding plates, which can firmly support the inner side of the high-voltage coil, avoid the high-voltage coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a winding body of a high-voltage winding, the winding body comprising a plurality of winding plates, the plurality of winding plates being evenly distributed along the circumference of the winding body, and at least one gasket being arranged between two adjacent winding plates.

[0006] The winding body further comprises a plurality of auxiliary parts, which are annular and arranged at intervals along the axial direction of the winding body, and at least one gasket is arranged between two adjacent auxiliary parts.

[0007] The length of the gasket is equal to the distance between two adjacent auxiliary parts, so that two ends of the gasket abut against the two auxiliary parts respectively.

[0008] Wherein, the auxiliary part is connected with the winding board.

[0009] Wherein, a card slot is arranged on the auxiliary component or the winding plate, and the winding plate and the auxiliary component are connected by the card slot.

[0010] The auxiliary component or the winding plate is fixed in the slot by an adhesive, and the adhesive is a two-component epoxy adhesive.

[0011] The winding plate and the auxiliary component are separately formed and then bonded and fixed; or the winding plate and the auxiliary component are integrally formed.

[0012] The winding body also includes a support tube, which is a hollow cylinder. A plurality of winding plates are evenly distributed on the outer peripheral surface of the support tube in the circumferential direction, and a gasket is arranged closely against the support tube.

[0013] Among them, the gasket is made of silicone rubber.

[0014] The second purpose of the present application is to provide a high-voltage winding, including a winding body of the aforementioned high-voltage winding, a wire is wound on the winding body to form a high-voltage coil, the high-voltage coil is entirely covered with a high-voltage insulation layer, and the high-voltage insulation layer wraps both ends of the winding body.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the present application sets a gasket between two adjacent winding plates, which can firmly support the inner side of the high-voltage coil, avoid the high-voltage coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil. At the same time, the gasket is made of the same material as the high-voltage insulation layer, and there is no need to remove the gasket, which improves production efficiency and can further improve the insulation performance of the high-voltage winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a dry-type transformer 10 according to one embodiment of the present application;

[0017] Figure 2 is a top view of a dry-type transformer 10 according to an embodiment of the present application;

[0018] Figure 3 is a front view of an assembled core 110 according to an embodiment of the present application;

[0019] Figure 4 yes Figure 2 Enlarged view of G in the middle;

[0020] Figure 5 is a three-dimensional schematic diagram of a winding body 1310 according to an embodiment of the present application;

[0021] Figure 6 is a cross-sectional view of a support tube 1311 according to an embodiment of the present application;

[0022] Figure 7 It is a three-dimensional schematic diagram of a high-voltage coil 1320 wound on a winding body 1310 according to an embodiment of the present application;

[0023] Figure 8 is a three-dimensional schematic diagram of a high-voltage winding 130 according to an embodiment of the present application;

[0024] Fig. 9 is a three-dimensional schematic diagram of a tooling connector 101 according to an embodiment of the present application;

[0025] Fig.10 is a schematic circuit diagram of a high voltage coil 1320 according to an embodiment of the present application;

[0026] Fig.11 is a partial cross-sectional view of a high voltage winding 130 according to an embodiment of the present application;

[0027] Fig.12 is a partial cross-sectional view of a high voltage winding 230 according to another embodiment of the present application;

[0028] Fig.13 is a partial cross-sectional view of a high voltage winding 330 according to another embodiment of the present application;

[0029] Fig.14 is a partial cross-sectional view of a high voltage winding 430 according to another embodiment of the present application;

[0030] Fig.15 is a three-dimensional schematic diagram of a winding body 5310 according to another embodiment of the present application;

[0031] Fig.16 yes Fig.15 The enlarged view of the H in the middle;

[0032] Fig.17 is a three-dimensional schematic diagram of a support cylinder 6311 according to another embodiment of the present application;

[0033] Fig.18 yes Fig.17 The enlarged view of J in the middle;

[0034] Fig.19 is a three-dimensional schematic diagram of a winding portion 7310 according to another embodiment of the present application;

[0035] Fig. 20 It is a three-dimensional schematic diagram of an auxiliary component 7312 of another embodiment of the present application. DETAILED DESCRIPTION

[0036] Upon request, specific embodiments of the present application will be disclosed herein. However, it should be understood that the embodiments disclosed herein are merely typical examples of the present application, which may be embodied in various forms. Therefore, the specific details disclosed herein are not considered to be restrictive, but only as a basis for the claims and as a representative basis for teaching those skilled in the art to apply the present application in various ways in practice in any appropriate manner, including using the various features disclosed herein and combining features that may not be explicitly disclosed herein.

[0037] The "connection" described in this application should be understood in a broad sense, unless otherwise clearly specified or limited, and can be directly connected or connected through an intermediate medium. In the description of this application, it should be understood that the orientation or position relationship indicated by "upper", "lower", "end", "one end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this 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 this application.

[0038] like Figure 1-Figure 3 As shown, the dry-type transformer 10 is a three-phase transformer, which is respectively A phase, B phase and C phase, that is, the dry-type transformer 10 includes three single-phase transformers 100. According to the different structures of the iron core 110, the three transformers 100 can be arranged to form a linear or triangular structure, and the three transformers 100 are symmetrical. In addition, the dry-type transformer 10 can also be an isolation transformer, a frequency conversion transformer, a test transformer, etc.

[0039] In one embodiment, continue to refer to Figure 1-Figure 3 , three transformers 100 are arranged to form a linear structure, and the dry-type transformer 10 includes an iron core 110, three low-voltage windings 120 and three high-voltage windings 130. The iron core 110, the low-voltage winding 120 and the high-voltage winding 130 are arranged in sequence from the inside to the outside. The iron core 110 includes three columnar iron core bodies 111, an upper iron yoke 112 located at the upper ends of the three columnar iron core bodies 111 and a lower iron yoke 113 located at the lower ends of the three columnar iron core bodies 111. The three low-voltage windings 120 are respectively sleeved on the outer peripheries of the three columnar iron core bodies 111, and the three high-voltage windings 130 are respectively sleeved on the outer peripheries of the three low-voltage windings 120, that is, the three columnar iron core bodies 111, the three low-voltage windings 120 and the three high-voltage windings 130 are sleeved one by one from the inside to the outside. The columnar iron core 111 is formed by stacking multiple layers of silicon steel sheets, which are tied and fixed with cable ties. The radial cross-section of the columnar iron core 111 is roughly elliptical or circular or other shapes, as long as it can be accommodated in the hollow cavity of the low-voltage winding 120. There is no limitation here. The upper iron yoke 112 and the lower iron yoke 113 are also formed by stacking multiple layers of silicon steel sheets, so that the three columnar iron cores 111 are fixedly connected, thereby forming a Figure 3 A three-phase core 110 is shown.

[0040] Combination Figure 1 and Figure 2As shown, a core clamp 140 is provided on the outer side of the iron core 110. The core clamp 140 is formed by connecting three clamps to form a structure similar to a channel steel, that is, the core clamp 140 is integrally in a "C" shape structure. Of course, in other embodiments, the core clamp can also be a hollow pipe fitting, that is, the core clamp is formed by connecting and surrounding several clamp pieces of plate structures to form a closed structure, making the structure of the core clamp more stable.

[0041] Among them, the core clamp 140 is made of a fiber-reinforced composite material. Specifically, it can be molded by impregnating glass fiber with epoxy resin, or by impregnating aramid fiber with epoxy resin, or other composite materials can also be integrally molded, which is not limited here.

[0042] The fiber-reinforced composite material refers to a composite material formed by reinforcing fiber materials, such as glass fiber, aramid fiber, etc., and a matrix material through forming processes such as winding, molding or pultrusion. The core clamp 140 made of the fiber-reinforced composite material has low cost, light weight, good mechanical properties, and low carbon emission during the production process of the fiber-reinforced composite material, which is more green and environmentally friendly.

[0043] Combined Figure 2 and Figure 4 As shown, the low-voltage winding 120 includes copper foils 121, low-voltage insulating layers 122 and support bars 123, and the copper foils 121 and the low-voltage insulating layers 122 are arranged alternately. Specifically, the copper foils 121 are formed by winding a whole copper foil paper, and the low-voltage insulating layers 122 and the copper foils 121 are overlapped and then wound together. At least one heat dissipation air duct is provided in the low-voltage winding 120, and the heat dissipation air duct is located between adjacent copper foils 121 and low-voltage insulating layers 122, and the support bars 123 are located in the heat dissipation air duct for supporting and isolating adjacent copper foils 121 and low-voltage insulating layers 122. The support bars 123 are insulating support bars 123, and a plurality of insulating support bars 123 are provided in each layer of the heat dissipation air duct. The plurality of insulating support bars 123 are arranged at intervals in the circumferential direction of the outer peripheral surface of the copper foil 121, and at the same time play a role in supporting adjacent copper foils 121 and low-voltage insulating layers 122. At least two insulating support bars 123 are provided in each layer of the heat dissipation air duct, and can be two, three, four or more. Preferably, the plurality of insulating support bars 123 in the same layer are evenly spaced in the circumferential direction of the outer peripheral surface of the copper foil 121. The setting of the heat dissipation air duct can release the heat generated by the low-voltage winding 120 during the operation of the dry-type transformer 10 and avoid overheating failure. Among them, the heat dissipation air duct can be provided with one layer, or two layers or more layers, which is not limited here.

[0044] Among them, the low-voltage insulation layer 122 adopts polyimide impregnated paper, which can be specifically SHS-P diphenyl ether prepreg material, which is made of polyimide film and polysulfone fiber non-woven soft composite material impregnated with diphenyl ether resin and then baked. Of course, the low-voltage insulation layer can also use DMD insulation paper or silicone rubber film, or other insulating materials, which can be selected according to the different temperature rise levels of the dry-type transformer.

[0045] The insulating support bar 123 is made of glass fiber impregnated with epoxy resin, or aramid fiber impregnated with epoxy resin, which is not limited here. In addition, the insulating support bar 123 is a long strip with an I-shaped cross section, which has a more stable mechanical strength. Of course, the insulating support bar can also be a long strip with a square cross section or other shapes, as long as it can play a supporting and isolating role.

[0046] like Figure 5-Figure 10 As shown, the high-voltage winding 130 includes a winding body 1310, a high-voltage coil 1320 and a high-voltage insulating layer 1330, and the wire is wound on the winding body 1310 to form the high-voltage coil 1320. Specifically, the winding body 1310 includes a support cylinder 1311 and a winding portion 1312, wherein the support cylinder 1311 is a hollow cylinder, which can be a hollow cylinder, a hollow elliptical cylinder, or other hollow cylindrical bodies; the winding portion 1312 is located on the outer circumferential surface of the support cylinder 1311, and the wire is wound in the winding portion 1312 to form the high-voltage coil 1320, and the high-voltage coil 1320 includes a plurality of coil segments, and the plurality of coil segments are arranged at intervals along the axial direction of the support cylinder 1311.

[0047] Specifically, the winding portion 1312 includes a plurality of winding plates 1313, which are uniformly distributed on the outer peripheral surface of the support tube 1311 in the circumferential direction, and each winding plate 1313 is arranged axially along the support tube 1311, and the axial length of the winding plate 1313 along the support tube 1311 is less than the axial length of the support tube 1311 along its axial direction. Among them, the number of winding plates 1313 is at least two, that is, it can be two, three or more, which is not limited here. In order to make the wire winding firm and save materials as much as possible, the number of winding plates 1313 of the 10kV / 1000kVA dry-type transformer is set to twelve. In other embodiments, the axial length of the winding plate along the support tube can also be equal to the axial length of the support tube along its axial direction.

[0048] The winding plate 1313 is a rectangular plate, and the longer side of the winding plate 1313 is arranged along the axial direction of the support tube 1311. The winding plate 1313 is also provided with a plurality of winding grooves 1314. The plurality of winding grooves 1314 are arranged along the radial direction of the support tube 1311 and are distributed at intervals along the axial direction of the support tube 1311, so that the winding plate 1313 is comb-tooth-shaped, that is, a plurality of comb teeth are formed on the winding plate 1313. The height of the comb teeth on the winding plate 1313 along the axial direction of the support tube 1311 is defined as the tooth height. The tooth height of the comb teeth at both ends of the winding plate 1313 and the tooth height of the comb teeth in the middle of the winding plate 1313 are both greater than the tooth height of the comb teeth in other parts. This is because the field strength at the ends of the high-voltage coil 1320 is uneven. Setting the tooth height at both ends of the winding plate 1313 a little larger can make the electric field uniform. A tap of the tap line needs to be led out in the middle of the winding plate 1313. Setting the tooth height in the middle of the winding plate 1313 a little larger will increase the distance between the corresponding adjacent two winding slots 1314, leaving space for the tap led out from the middle of the winding plate 1313.

[0049] At the same time, the comb tooth area with slightly larger tooth height is defined as the high comb tooth area, and the comb tooth area with slightly smaller tooth height is defined as the low comb tooth area. Then through the above-mentioned setting, the winding plate 1313 forms the first high comb tooth area, the first low comb tooth area, the second high comb tooth area, the second low comb tooth area, and the third high comb tooth area in sequence from one end to the other end along the axial direction of the support tube 1311. Furthermore, the tooth heights of the first high comb tooth area, the second high comb tooth area, and the third high comb tooth area are not specifically limited, for example, they can be the same as each other or different. And the first high comb tooth area and the third high comb tooth area can be symmetrically arranged with respect to the second high comb tooth area, and the first low comb tooth area and the second low comb tooth area can also be symmetrically arranged with respect to the second high comb tooth area. Of course, it can also be arranged asymmetrically, which is not limited here.

[0050] At least one section of coil is arranged between two adjacent comb teeth on the winding plate 1313, so that a wire is wound in each winding slot 1314, the high-voltage coil 1320 is arranged in a reasonable distribution, and each section of the coil is arranged at intervals.

[0051] Among them, when several winding plates 1313 are evenly distributed on the outer surface of the support tube 1311 in the circumferential direction, the two ends of all the winding plates 1313 are arranged flush, and the winding grooves 1314 on all the winding plates 1313 are matched one by one in the circumferential direction of the support tube 1311. Each coil section is wound by a wire along the circumference of the support tube 1311 in a corresponding circle of winding grooves 1314 on all the winding plates 1313, with balanced force and good mechanical strength.

[0052] In other embodiments, in order to allow for the setting position of the tap, a plurality of winding plates may be fixed on the outer circumferential surface of the support tube in an uneven manner. For example, the distance between two adjacent winding plates is greater than the distance between any other two adjacent winding plates. In this case, each tap is led out from between the two adjacent winding plates. In this way, the tooth height of the comb teeth in the middle of the winding plate does not need to be set larger, and the setting position of each tap can be reserved.

[0053] In other embodiments, the winding plate may also be an annular disk member disposed circumferentially around the support tube. A plurality of winding plates are disposed at intervals along the axial direction of the support tube, and the wire is wound in a groove formed by two adjacent winding plates.

[0054] Among them, the support tube 1311 is a hollow tube formed by glass fiber impregnated with epoxy resin, winding and curing or pultrusion, or it can be a hollow tube formed by glass fiber or aramid fiber impregnated with epoxy resin, pultrusion and winding, or it can be a hollow tube formed by aramid fiber impregnated with epoxy resin, winding and curing or pultrusion, or it can be made of other composite materials, which is not limited here.

[0055] In one application scenario, the support tube 1311 and the winding plate 1313 are separately molded and then glued and fixed. The winding plate 1313 is also made of glass fiber impregnated with epoxy resin. Multiple layers of glass fiber cloth are impregnated with epoxy resin and then stacked to a certain thickness, and then molded and cured to form a rectangular glass fiber reinforced plastic plate, and then turned to form a winding groove 1314, thereby forming the winding plate 1313. The winding plate 1313 is fixedly connected to the outer peripheral surface of the support tube 1311 by an adhesive, which saves the most materials and can save costs. The adhesive is a two-component high-temperature resistant epoxy glue or other adhesive. As long as the support tube 1311 and the winding plate 1313 can be firmly bonded and resistant to high temperatures, it can adapt to the high-temperature injection of the high-voltage insulation layer 1330 outside the winding body 1310.

[0056] In this embodiment, the winding board 1313 is molded and cured. In other embodiments, the comb-shaped winding board can also be directly formed by integral casting and curing to simplify the process. The material of the winding board is consistent with the above and will not be repeated.

[0057] In another application scenario, the support tube 1311 and the winding plate 1313 are integrally formed. Glass fiber or aramid fiber is impregnated with epoxy resin and pulled or wound into a thick hollow tube, and then the hollow tube is turned to form the support tube 1311 and the winding plate 1313. This method wastes materials, but can ensure the strength between the support tube 1311 and the winding plate 1313, and prevent the connection between the support tube 1311 and the winding plate 1313 from being damaged due to loose bonding or in the subsequent injection of the high-voltage insulation layer 1330.

[0058] In another application scenario, combined with Figure 5 and Figure 6 As shown, the winding body 1310 also includes two flanges 1315. Specifically, the flanges 1315 are located at the two ends of the support tube 1311 and extend radially outward along the support tube 1311 to form an annular disk surface. The flanges 1315 at both ends are arranged opposite to each other. When the winding plate 1313 is placed on the outer peripheral surface of the winding body 1310, the outer end surfaces of the two ends of the winding plate 1313 abut against the disk surfaces of the two flanges 1315 facing each other, so as to prevent the winding plate 1313 from being damaged due to the large injection pressure during the injection of the high-voltage insulation layer 1330. Of course, the outer end surfaces of the two ends of the winding plate 1313 may not abut against the disk surfaces of the two flanges 1315 facing each other, that is, there is a gap between the outer end surfaces of the two ends of the winding plate 1313 and the disk surface of the winding plate 1313 facing the flanges 1315, which is not limited here.

[0059] The flange 1315 is made of glass fiber impregnated with epoxy resin and is integrally formed with the support tube 1311, that is, it is formed by pultrusion or winding of glass fiber or aramid fiber impregnated with epoxy resin, and then processed and polished into a disc with a certain thickness.

[0060] In this embodiment, at least one gasket 1316 is arranged between two adjacent winding plates 1313, and the winding plate 1313 includes a bottom plate and a plurality of comb teeth located on the bottom plate. The gasket 1316 is a rectangular sheet with a certain thickness, and the length direction of the gasket 1316 is arranged along the axial direction of the winding body 1310, and the gasket 1316 is arranged in the middle between the two adjacent winding plates 1313 in close contact with the support cylinder 1311, so that when the wire is wound, the gasket 1316 can firmly support the inner side of each coil section, avoid the coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil 1320.

[0061] In this embodiment, the length of the gasket 1316 is equal to the length of the winding plate 1313, so that when the length direction of the gasket 1316 is arranged along the axial direction of the winding body 1310, the two ends of the gasket 1316 can respectively abut the disk surfaces of the two flanges 1315 facing each other, so that the inner side of each section of the coil wound in each winding groove 1314 on the winding plate 1313 can be effectively supported. A gasket 1316 is arranged between any two adjacent winding plates 1313, which can reduce costs while ensuring the supporting effect.

[0062] In other embodiments, the shape, size, and quantity of the gaskets can be adjusted according to the structural requirements of the winding body and the high-voltage coil, as long as the gaskets can stably support the inner side of the high-voltage coil.

[0063] In this embodiment, the gasket 1316 is made of silicone rubber, which is the same material as the high-voltage insulation layer 1330, so that after the high-voltage coil 1320 is wound, there is no need to remove the gasket 1316, thereby improving production efficiency; at the same time, due to the supporting effect of the gasket 1316, a certain distance is maintained between the inner side of the high-voltage coil 1320 and the support tube 1311, and then the high-temperature vulcanized silicone rubber can fully fill the inner side of the high-voltage coil 1320 during the subsequent injection process, ensuring the insulation performance of the high-voltage winding 130. In other embodiments, the gasket can also be made of other materials, which can be adjusted accordingly according to the design requirements of the high-voltage winding, and no specific restrictions are made here.

[0064] The winding body 1310 is made of the above-mentioned fiber-reinforced composite material, which has the characteristics of light weight and high strength, so that the winding body 1310 has good mechanical strength, can effectively support the winding of the wire, is not easy to be damaged, and avoids the injection impact force generated when the high-temperature vulcanized silicone rubber is injected outside the winding body 1310 to disperse and shift the wire; and the fiber-reinforced composite material has good heat resistance, which avoids the deformation of the winding body 1310 due to excessive heat generated by the high-voltage coil 1320 during the operation of the dry-type transformer 10.

[0065] Combination Figure 5 , Figure 7 and Figure 8 , taking the A-phase transformer 100 as an example, the wire is circumferentially wound on the outer surface of the winding body 1310 to form a high-voltage coil 1320. Specifically, the wire is wound in the winding groove 1314 of the winding part 1312, so that the high-voltage coil 1320 is spaced apart in the axial direction of the support tube 1311, and the wire forms two external connections at the head and tail ends after winding, namely the first external connection D and the second external connection X. The first external connection D is used to connect the cable, and the second external connection X is used to connect other external connections, such as in a three-phase transformer, for mutual connection with each phase transformer. The wire leads to six taps in the middle part of the winding body 1310 along its axial direction, namely tap 2, tap 3, tap 4, tap 5, tap 6 and tap 7. The six taps form a tap switch. For ease of description, tap 2, tap 4 and tap 6 are defined as the first tap switch, and tap 3, tap 5 and tap 7 are defined as the second tap switch.

[0066] In one application scenario, combined with Figure 5 , Figure 7 and Fig.10As shown, the wire includes a first wire and a second wire, both of which are continuous wires, and the first wire and the second wire are both coated with an insulating layer, the insulating layer can be a polyimide film or a glass fiber film, or the insulating layer can be other insulating materials such as polyester paint, or a combination of multiple insulating materials can be used, which is not limited here. For the convenience of description, the upper end of the winding part 1312 is defined as the first end, and the lower end of the winding part 1312 is defined as the second end. The first wire is wound from the first end of the winding part 1312 along the axial direction of the support tube 1311 to the middle of the winding part 1312, and three taps are led out. The first conductor is wound from the first end of the winding part 1312 to the second end of the winding part 1312. The first conductor is wound around the designed number of turns in the first winding slot 1314 corresponding to a circle on all winding plates 1313 to form a first section coil 1321. The first section coil 1321 is wound in a pancake-like manner, and only one pancake coil is arranged in each winding slot 1314. At this time, each section coil has only one pancake coil. The inner turn wire end of the first section coil 1321 (i.e., the head end of the first conductor) is the first external connection D. The outer turn wire end of the first section coil 1321 extends to the second winding slot 1314 corresponding to a circle on all winding plates 1313 and continues to be wound to form the second section coil 1322, and so on, until the first conductor is wound to the middle of the winding body 1310, and three taps are respectively led out through the outer turn wire ends of the three sections coils, i.e., Fig.10 The tap 6, tap 4 and tap 2 are shown, and the winding of the first conductor is now complete.

[0067] The second conductor is wound from the middle of the winding part 1312 along the axial direction of the support tube 1311 to the second end of the winding part 1312, and three other taps are led out. Specifically, the second conductor begins to be wound in the next winding groove 1314 adjacent to tap 2 to form the third segment coil 1323. The second conductor continues to be wound toward the second end of the winding part 1312 in the same winding manner as the first conductor, and three other taps, namely tap 3, tap 5 and tap 7, are respectively led out from the three segments of the coil starting from the third segment coil 1323, until the second conductor is wound to the last winding groove 1314 of a corresponding circle on each winding plate 1313 at the second end of the winding part 1312 and forms a terminal segment coil 1324. The outer turn conductor end of the terminal segment coil 1324 (i.e., the end of the second conductor) is the second external connection X, and the second conductor is now completely wound.

[0068] When winding the wire, it is wound in a circle of winding grooves 1314 corresponding to all winding plates 1313, so that each coil formed by winding the wire is perpendicular to the axial direction of the support tube 1311, the winding is convenient and the wire is arranged neatly, the winding plate 1313 and the support tube 1311 are evenly stressed, and the mechanical strength is good.

[0069] Thus, the pancake-shaped high-voltage coil 1320 has good mechanical strength and strong ability to withstand the electromotive force generated by short-circuit current. Compared with the layer-shaped coil, it has more pancakes and better heat dissipation capacity. Figure 8 and Fig.10 As shown, the first tap switch and the second tap switch are arranged in parallel, and six taps form a tapping device of the high-voltage coil 1320, which is used for the dry-type transformer 10 to adjust the voltage according to different operating conditions.

[0070] The wire is wound on the winding body 1310 to form a high-voltage coil 1320, so that the high-voltage coil 1320 is ring-shaped, and the ring width of the high-voltage coil 1320 is defined as the width of the high-voltage coil 1320. The width of the high-voltage coil 1320 on each radial section is consistent, that is, the outer side surface of the high-voltage coil 1320 and the outer peripheral surface of the support cylinder 1311 are equidistant, so that the overall force of the high-voltage coil 1320 is balanced. Of course, considering the actual operation situation, the width of each coil on its radial section may not be exactly the same, as long as it is roughly the same.

[0071] In this embodiment, the tap switch includes six taps, and the dry-type transformer 10 has five gears for adjusting the voltage. In other embodiments, the tap switch may also include four taps, that is, the first tap switch and the second tap switch each include two taps, and the dry-type transformer includes three gears for adjusting the voltage. As long as it meets the actual use requirements of the dry-type transformer, it is not limited here.

[0072] like Figure 7-Figure 9 As shown, the high-voltage insulation layer 1330 wraps the high-voltage coil 1320 and the winding body 1310 to form the high-voltage winding 130. The high-voltage insulation layer 1330 is a high-temperature vulcanized silicone rubber. The wire is first wound on the winding body 1310 to form the high-voltage coil 1320. The winding body 1310 and the high-voltage coil 1320 are used as the body to be injected. The body to be injected is placed in the mold of the injection machine. By adding silicone rubber raw materials, the high-temperature vulcanized silicone rubber is injected as a whole on the periphery of the body to be injected to obtain the high-voltage winding 130. The high-voltage insulation layer 1330 uses high-temperature vulcanized silicone rubber, which improves the insulation performance and mechanical properties of the high-voltage winding 130 as a whole.

[0073] Among them, the high temperature vulcanized silicone rubber of the present application adopts a high temperature vulcanized silicone rubber material system, which specifically includes raw rubber, a reinforcing agent, a flame retardant, a heat-resistant agent and other auxiliary materials.

[0074] After the high-voltage coil 1320 and the winding body 1310 are covered with the high-temperature vulcanized silicone rubber by overall vacuum injection, the high-temperature vulcanized silicone rubber fills the gap between the high-voltage coil 1320 and the winding body 1310 and wraps the two ends of the winding body 1310, and the high-temperature vulcanized silicone rubber does not cover the inner wall of the supporting tube 1311, so that the high-voltage winding 130 is hollow cylindrical as a whole, which can be a hollow cylinder, a hollow elliptical cylinder, or other hollow cylindrical bodies.

[0075] Before the high temperature vulcanized silicone rubber is injected as a whole, the six taps are connected by setting the tooling connector 101 to prevent the six taps from being covered by the silicone rubber during the injection process and being unable to be used for wiring. Fig. 9 As shown, the tooling connector 101 is an aluminum alloy plate, and a protective cavity is provided on the plate surface of the tooling connector 101, and the tap is connected and fixed in the protective cavity. In the present application, the protective cavity is six identical step holes 1011, and the inner wall of the step hole 1011 is also provided with a thread. The six taps are respectively connected to the six step holes 1011, and can be connected by welding, or fixedly connected by other means, which is not limited here. In addition, the six step holes 1011 on the tooling connector 101 are arranged in parallel in two rows, and three step holes 1011 are arranged in each row so that the first tap switch and the second tap switch are also arranged in parallel. At the same time, before the overall injection, after the six taps are respectively connected to the six step holes 1011, bolts are connected in the six step holes 1011, so that the bolts can directly fill the remaining space of the step hole 1011 to prevent the silicone rubber from filling the six step holes 1011, thereby avoiding the six taps from being covered with silicone rubber and being unable to be used for wiring.

[0076] Two symmetrical connection grooves 1012 are also provided on two opposite sides of the tooling connector 101. Two connection blocks are correspondingly provided in the injection mold. The connection grooves 1012 are connected to the connection blocks to fix the tooling connector 101 in the injection mold, so as to prevent the position of the tooling connector 101 from shifting due to the large injection pressure during the injection of silicone rubber. In other embodiments, a connection block may be provided on the tooling connector, and a connection groove may be provided in the injection mold accordingly. After the two are matched and connected, the tooling connector is fixed in the injection mold, so as to prevent the position of the tooling connector from shifting due to the large injection pressure during the injection of silicone rubber. After the high-voltage insulating layer 1330 is formed by integral injection, a small amount of silicone rubber is coated on the side of the tooling connector 101. Since the amount of silicone rubber coated on the tooling connector 101 is relatively small, the tooling connector 101 can be directly removed by tools to expose the first tap changer and the second tap changer, and finally a structure as shown in the figure is formed. Figure 8 A high voltage winding 130 is shown.

[0077] In this embodiment, the tooling connector 101 is set as one. In other embodiments, the tooling connector can also be set as two. In this case, the size of the tooling connector is set to be smaller. Three step holes are opened on each tooling connector, and six tap joints can be connected to the six step holes respectively. There is no limitation here.

[0078] In this embodiment, if Fig.11 As shown, it is a partial cross-sectional view of the high-voltage winding 130 coated with a high-voltage insulating layer 1330 cut along its axial direction. The conductor is wound in a comb-tooth-shaped winding plate 1313 using the aforementioned winding method to form a pancake-shaped high-voltage coil 1320. In the axial direction of the high-voltage winding 130, the pancake-shaped high-voltage coil 1320 is spaced apart from the comb teeth of the winding plate 1313, that is, a pancake coil is provided between two adjacent comb teeth.

[0079] In another embodiment, Fig.12 As shown, it is a partial cross-sectional view of a high-voltage winding 230 coated with a high-voltage insulating layer 2330 cut along its axial direction. The wire is wound on a comb-shaped winding plate 2313 by a double-winding continuous winding method to form a high-voltage coil 2320. After two identical continuous wires are arranged adjacent to each other, winding is started from a circle of winding grooves 2314 corresponding to the first end of all winding plates 2313 at the same time. The specific winding method is consistent with the winding method of the aforementioned high-voltage coil 1320 until a high-voltage coil 2320 is formed that is arranged at intervals along the axial direction of the high-voltage winding 230, and each section of the coil includes two pancake coils arranged closely together. The two identical wires here refer to the two wires having the same size and material. Compared with the continuous winding structure of a single wire (i.e., the structure of the aforementioned high-voltage coil 1320), in a high-voltage winding of the same size and specification, the number of winding grooves 2314 can be reduced, thereby reducing the wire transition section between the interval sections of each section of the coil, thereby reducing the amount of wire used, and achieving the purpose of reducing costs. In other embodiments, three or more pancake coils may be arranged between two adjacent comb teeth on the winding board.

[0080] In another embodiment, Fig.13As shown, it is a partial cross-sectional view of the high-voltage winding 330 coated with a high-voltage insulating layer 3330 cut along its axial direction. The width of the winding groove 3314 on the winding plate 3313 along the axial direction of the support tube 3311 is greater than the width of the winding groove 2314 on the winding plate 2313 along the axial direction of the support tube 2311. The conductor is firstly wound continuously downward from the upper end of the first winding groove 3314 along the axial direction of the support tube 3311 by a layer winding method until the conductor is wound to the lower end of the first winding groove 3314 to form a first layer of coils, and then the second layer of coils is wound upward in the reverse direction, and the winding is repeated repeatedly in this way until the first section of coil 3321 reaches the preset width of the high-voltage coil 3320 in the radial direction of the support tube 3311, and finally the first section of coil 3321 is in a tightly arranged spiral shape on the outer peripheral surface of the support tube 3311. Then, the wire passes through the comb teeth of the winding plate 3313 and transitions to the second winding slot 3314, and continues to be wound in a layered manner to form a second coil 3322, and continues to be wound in a similar manner until the winding of the wires in all the winding slots 3314 is completed, thereby forming a multi-segment cylindrical high-voltage coil 3320. Compared with the pancake structure (i.e., the structure of the aforementioned high-voltage coil 2320) wound by a double-winding continuous winding method, in the high-voltage winding of the same specification, the high-voltage coil 3320 is more compact, the number of winding slots 3314 is less, and thus the amount of wire used is also less, thereby further achieving the purpose of reducing costs.

[0081] In another embodiment, Fig.14 As shown, it is a partial cross-sectional view of a high-voltage winding 430 coated with a high-voltage insulating layer 4330 cut along its axial direction. The formation method of the high-voltage coil 4320 is consistent with the formation method of the aforementioned high-voltage coil 3320, and no further description is given. However, the length of each section of the high-voltage coil 4320 along the axial direction of the support tube 4311 is greater than the length of each section of the high-voltage coil 3320 along the axial direction of the support tube 3311. For dry-type transformers 10 of the same voltage level, the number of sections of the segmented cylindrical high-voltage coil 4320 is less, and the voltage difference between each section of the coil is greater. Therefore, an insulating layer needs to be added between the layers of each section of the coil to reduce the voltage difference. At this time, an interlayer insulating layer 4301 is provided for each section of the coil along the axial direction of the high-voltage winding 430 to prevent the interlayer electric field strength from being higher than the tolerance critical value of the insulating film coated with the insulated wire. In addition, the interlayer insulating layer 4301 has a strong ability to resist lightning strikes, and the economic advantage is more obvious.

[0082] Among them, the interlayer insulation layer 4301 can be a mesh cloth, or it can be an insulating support bar arranged at intervals in the circumferential direction, or other hard insulating materials. And the insulating support bar is an insulating strip with wavy edges, which can prevent the insulating support bar from being damaged due to the extremely high injection pressure when injecting high-temperature vulcanized silicone rubber to form a high-voltage insulation layer. And the insulating support bar is made of hard insulating material, which can resist the impact force during high-temperature injection of silicone rubber. At the same time, the interlayer insulation layer 4301 can be set to one layer, or it can be set to two layers or three layers, depending on different design situations, and is not limited here.

[0083] In one application scenario, combined with Figure 15-16 As shown, the winding body 5310 is similar in structure to the aforementioned winding body 1310, except that the support tube 5311 is connected to the winding portion 5312 by clamping. Specifically, the winding body 5310 also includes an auxiliary member 5316, which is located in the middle of the outer peripheral surface of the support tube 5311 and extends radially outward along the support tube 5311, so that the auxiliary member 5316 surrounds the support tube 5311 and presents an annular disk. A clamping groove is provided on the winding plate 5313 or the auxiliary member 5316, and the winding plate 5313 is connected to the auxiliary member 5316 by clamping the groove. In this embodiment, each winding plate 5313 is provided with a first clamping groove 53131, and the first clamping groove 53131 is arranged to correspond to the position of the auxiliary member 5316, so that the auxiliary member 5316 is clamped in each first clamping groove 53131.

[0084] The longer side of the winding plate 5313 is arranged along the axial direction of the support tube 5311, and a plurality of winding grooves 5314 are arranged along the radial direction of the support tube 5311 and are spaced apart along the axial direction of the support tube 5311, so that the winding plate 5313 forms a plurality of comb teeth. The first clamping groove 53131 is located on the winding plate 5313 and is arranged opposite to the winding groove 5314, that is, the first clamping groove 53131 is arranged along the radial direction of the support tube 5311 on the side of the winding plate 5313 close to the support tube 5311, so that the auxiliary member 5316 protruding from the outer peripheral surface of the support tube 5311 can be clamped in the first clamping groove 53131. The auxiliary member 5316 can keep the winding plate 5313 stably arranged, and avoid the movement and dislocation of the winding plate 5313 during the wire winding process and the high-voltage insulation layer injection process.

[0085] The first card slot 53131 is located in the middle of the winding plate 5313, and in the radial direction of the support tube 5311, the first card slot 53131 extends from the side of the winding plate 5313 close to the support tube 5311 to a comb tooth in the middle of the winding plate 5313; or in the radial direction of the support tube 5311, the first card slot 53131 is arranged flush with a comb tooth in the middle of the winding plate 5313 but does not extend to the comb tooth. On the one hand, it is avoided that the first card slot 53131 is arranged flush with the winding slot 5314 to affect the mechanical strength of the winding plate 5313, or even cause the winding plate 5313 to break under stress; on the other hand, since the comb teeth in the middle of the winding plate 5313 have a larger tooth height, it can further avoid that the first card slot 53131 affects the mechanical strength of the winding plate 5313 after being arranged. At the same time, the groove depth of the first slot 53131 in the radial direction of the support tube 5311 matches the width of the auxiliary part 5316 protruding from the support tube 5311, so that after the auxiliary part 5316 and the winding plate 5313 are assembled, the outer side surface of the auxiliary part 5316 is in close contact with the inner side surface of the first slot 53131, with good mechanical strength and reliable fastening. If the groove depth of the first slot 53131 is less than the width of the auxiliary part 5316 protruding from the support tube 5311, there is a gap between the winding plate 5313 and the support tube 5311, and there is a risk that the winding plate 5313 will be bent with the auxiliary part 5316 as the center during the wire winding process and the high-voltage insulation layer injection process; if the groove depth of the first slot 53131 is greater than the width of the auxiliary part 5316 protruding from the support tube 5311, there is a gap between the first slot 53131 and the auxiliary part 5316, and the auxiliary part 5316 cannot play a fastening role.

[0086] The auxiliary part 5316 is made of glass fiber impregnated with epoxy resin, and is first formed into a disc with a certain thickness by molding, and then the auxiliary part 5316 is fixedly connected to the outer peripheral surface of the support tube 5311 by an adhesive, which saves the most materials and can save costs. Of course, the auxiliary part can also be integrally formed with the support tube, that is, first made into a thick hollow tube, and then turned to form the winding plate 5313 and the auxiliary part 5316 at the same time.

[0087] In this embodiment, the auxiliary part 5316 and the first slot 53131 are correspondingly arranged in one group. In other embodiments, the auxiliary part and the first slot can also be correspondingly arranged in two or three groups along the axial interval of the support tube, so as to effectively distribute the bearing strength of the winding board and make the winding board structure more stable.

[0088] In this embodiment, at least one gasket 5317 is disposed between two adjacent winding plates 5313. The gasket 5317 is a rectangular plate, and the length direction of the gasket 5317 is disposed along the axial direction of the winding body 5310, and the gasket 5317 is disposed in the middle between two adjacent winding plates 5313 in close contact with the support cylinder 5311, so that when the wire is wound, the gasket 5317 can firmly support the inner side of each coil section, avoid the coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil.

[0089] In this embodiment, at least one gasket 5317 is respectively arranged on both sides of the auxiliary member 5316, for example, one gasket 5317 is respectively arranged on both sides of the auxiliary member 5316, that is, two gaskets 5317 are arranged between any two adjacent winding plates 5313, and the length of the gasket 5317 is equal to the distance between the auxiliary member 5316 and the end of the support tube 5311, so that when the length direction of the gasket 5317 is arranged along the axial direction of the winding body 5310, the two ends of the gasket 5317 can respectively abut the end of the support tube 5311 and the auxiliary member 5316, thereby enabling the inner side of each coil section wound on the winding plate 5313 to be effectively supported. The specific arrangement of the gasket 5317 is as described above and will not be repeated here.

[0090] In another application scenario, combined with Figure 17-Figure 18 As shown, unlike the support tube 5311, a plurality of second card slots 63161 are provided on the auxiliary part 6316 on the outer circumferential surface of the support tube 6311, and the plurality of second card slots 63161 are evenly distributed in the circumferential direction of the auxiliary part 6316, that is, the plurality of second card slots 63161 match and correspond to the plurality of winding plates. At this time, there is no need to provide card slots on the winding plate, and the winding plate can be directly clamped in the second card slots 63161, which can maintain the stable setting of the winding plate, avoid the movement and dislocation of the winding plate during the wire winding process and the high-voltage insulation layer injection process, and avoid providing card slots on the winding plate, thereby avoiding affecting the mechanical strength of the winding plate. The material and molding method of the auxiliary part 6316 are consistent with those of the aforementioned auxiliary part 5316, which will not be described in detail here. In this embodiment, gaskets are also provided on both sides of the auxiliary part 6316, and the specific structure is similar to that of the gasket 5317, which will not be described in detail here.

[0091] In other embodiments, Figure 19-20 As shown, the winding body may also include only the winding part 7310, that is, the winding body is not provided with a supporting tube, that is, the winding body omits the structure of the rigid insulating inner liner tube, so that the thermal conductivity of the high-voltage winding is better, and the interface between the high-voltage insulation layer and the rigid insulating inner liner tube is eliminated, thereby suppressing the discharge on the surface of the rigid insulating inner liner tube, saving materials and reducing costs.

[0092] Specifically, the winding portion 7310 includes a plurality of comb-shaped winding plates 7311 and a plurality of auxiliary parts 7312, wherein the plurality of auxiliary parts 7312 are annular and arranged at intervals along the axial direction of the auxiliary parts 7312, and the winding plates 7311 are fixed to the outer periphery of the plurality of auxiliary parts 7312 along the axial direction of the auxiliary parts 7312, so that the winding plates 7311 are connected to all auxiliary parts 7312 at the same time, and the plurality of winding plates 7311 are evenly distributed along the circumference of the auxiliary parts 7312. Among them, the axial direction of the auxiliary parts 7312 is the axial direction of the winding portion 7310, that is, the axial direction of the high-voltage winding. The auxiliary parts 7312 can be annular or elliptical, and can be designed according to the overall shape of the high-voltage winding. A plurality of winding plates 7311 are arranged circumferentially, and a wire is wound on the winding portion 7310 to form a high-voltage coil, and the high-voltage coil includes a plurality of coil segments, and the plurality of coil segments are arranged at intervals along the axial direction of the high-voltage winding, and the high-voltage insulation layer wraps the high-voltage coil, the plurality of auxiliary parts 7312 and the winding plate 7311. The auxiliary parts 7312 can maintain the stable arrangement of the winding plate 7311, and avoid the movement and dislocation of the winding plate 7311 during the wire winding process and the high-voltage insulation layer injection process.

[0093] In one embodiment, a plurality of third card grooves 73121 are provided on the outer surface of the auxiliary part 7312, and the plurality of third card grooves 73121 are evenly arranged along the circumference of the auxiliary part 7312, and the side surfaces of the plurality of winding plates 7311 are respectively correspondingly arranged in the plurality of third card grooves 73121, so that the plurality of winding plates 7311 are evenly distributed on the outer circumference of the plurality of auxiliary parts 7312 in the circumferential direction; both ends of all the winding plates 7311 are arranged flush, and the third card grooves 73121 on all the auxiliary parts 7312 are matched one by one in the axial direction of the auxiliary part 7312, so that each winding plate 7311 can be arranged along the axial direction of the auxiliary part 7312, and then the wire is wound in the comb teeth on the winding plate 7311 to form a high-voltage coil, that is, the plurality of sections of the high-voltage coil are spaced apart and distributed in the axial direction of the winding part 7310, with balanced force and good mechanical strength.

[0094] The width of the third slot 73121 along the circumferential direction of the auxiliary part 7312 is defined as the slot width of the third slot 73121. The slot width of the third slot 73121 matches the thickness of the winding plate 7311, so that the winding plate 7311 and the auxiliary part 7312 are securely assembled, thereby preventing the winding plate 7311 from being difficult to align and fix on the auxiliary part 7312 when the slot width of the third slot 73121 is smaller than the thickness of the winding plate 7311, or preventing the winding plate 7311 from falling off from the auxiliary part 7312 when the slot width of the third slot 73121 is larger than the thickness of the winding plate 7311. The winding board 7311 is fixedly connected in the third slot 73121 by an adhesive. The adhesive is a two-component high-temperature resistant epoxy adhesive. Of course, it can also be other adhesives, but it is necessary to ensure that the adhesive can make the winding board 7311 and the auxiliary part 7312 firmly bonded, and the adhesive must be resistant to high temperatures to adapt to the high-voltage insulation layer using high-temperature injection to cover the winding board 7311 and the auxiliary part 7312.

[0095] In other embodiments, a slot may be provided on the side of the winding plate near the auxiliary part, and the auxiliary part is clamped in the slot of the winding plate, so that the winding plate and the auxiliary part are fixedly connected. Of course, it is preferred that the third slot 73121 is provided on the auxiliary part 7312 in the aforementioned embodiment to avoid weakening the mechanical strength of the winding plate due to the provision of the slot.

[0096] In this embodiment, since the winding body 7310 is in a hollow state as a whole, the winding body 7310 needs to be sleeved on the outer periphery of the winding tool 701 before the wire is wound. After the winding body 7310 is sleeved on the outer periphery of the winding tool 701, a plurality of gaskets 7313 are arranged between two adjacent winding plates 7311. The gasket 7313 is a rectangular sheet, and the length direction of the gasket 7313 is arranged along the axial direction of the winding body 7310, and the gasket 7313 is arranged in the middle of two adjacent winding plates 7311 close to the outer wall of the winding tool 701, so that when the wire is wound, the gasket 7313 can firmly support the inner side of each coil, avoid the coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil.

[0097] In this embodiment, at least one gasket 7313 is disposed between two adjacent auxiliary members 7312, and the length of the gasket 7313 is equal to the distance between the two adjacent auxiliary members 7312, so that when the length direction of the gasket 7313 is disposed along the axial direction of the winding body 7310, the two ends of the gasket 7313 can respectively abut the two auxiliary members 7312, thereby effectively supporting the inner side of each coil section wound on the winding plate 7311. The shape, material, etc. of the gasket 7313 are as described above and will not be repeated here.

[0098] Continue reading Fig.19The winding plate 7311 is a comb plate 7311. The structure of the comb plate 7311 is similar to that of the aforementioned winding plate 1313, except that both ends of the comb plate 7311 are provided with flow grooves 73111, which facilitate the injection molding process of the high-voltage insulation layer. The injected silicone rubber material can flow from the end of the winding part 7310 into the inner side of the winding part 7310, so that the high-voltage insulation layer can fully fill the gap between the winding part 7310 and the high-voltage coil and the two ends of the winding part 7310.

[0099] The winding plate 7311 and the auxiliary part 7312 are both made of glass fiber impregnated with epoxy resin, and multiple layers of glass fiber cloth impregnated with epoxy resin are stacked to a certain thickness, and then molded and cured to form a glass fiber reinforced plastic part. In this embodiment, the winding plate 7311 and the auxiliary part 7312 are separately formed and then bonded and fixed. In other embodiments, the winding plate and the auxiliary part can also be integrally formed.

[0100] The beneficial effects of the present application are as follows: Different from the prior art, the present application sets a gasket between two adjacent winding plates, which can firmly support the inner side of the high-voltage coil, avoid the high-voltage coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil. At the same time, the gasket is made of the same material as the high-voltage insulation layer, and there is no need to remove the gasket, which improves production efficiency and can further improve the insulation performance of the high-voltage winding.

[0101] In addition, the high-voltage winding of the present application is a high-voltage insulation layer of high-temperature vulcanized silicone rubber poured outside the high-voltage coil. Compared with the epoxy resin high-voltage insulation layer in the prior art, silicone rubber has the following advantages: 1) It has good fire resistance, low temperature resistance, aging resistance and short-circuit test resistance, which can effectively extend the service life of the dry-type transformer; 2) The copper coil is easy to peel off from the silicone rubber, and the material recyclability is greater than 99%, which is more green and environmentally friendly; 3) The silicone rubber elastomer can weaken the local discharge inducement caused by mechanical vibration, and has an inhibitory effect on the discharge of the equipment. The product of silicone rubber under the discharge is non-conductive silicon dioxide, which can effectively inhibit the continued deterioration of insulation; 4) It can reduce the operating loss of the transformer and save energy; 5) It has good resistance to harsh environments and can be installed indoors and outdoors. At the same time, the silicone rubber of the present application is through overall high-temperature vulcanization injection molding. This process method makes the high-voltage insulation layer more stable and has higher mechanical properties than the existing room temperature vulcanization, and has better bonding performance with the high-voltage coil and winding body, which can effectively extend the service life of the high-voltage insulation layer. Furthermore, compared with liquid silicone rubber, the high-temperature vulcanized silicone rubber filler of the present application is evenly dispersed, and will not cause partial discharge in the dry-type transformer due to filler agglomeration, thereby improving the overall performance of the dry-type transformer.

[0102] The technical content and technical features of the present application have been disclosed above. However, it is understood that, under the creative concept of the present application, those skilled in the art can make various changes and improvements to the above structures and materials, including combinations of technical features disclosed or claimed separately herein, and obviously including other combinations of these features. These variations and / or combinations all fall within the technical field involved in the present application and fall within the protection scope of the claims of the present application.

Claims

1. A winding body of a high voltage winding, characterized in that: The winding body comprises a plurality of winding plates, which are evenly distributed along the circumference of the winding body, and at least one gasket is arranged between two adjacent winding plates for supporting the wire.

2. The winding body of the high voltage winding according to claim 1, characterized in that: The winding body further comprises a plurality of auxiliary parts, which are annular and arranged at intervals along the axial direction of the winding body, and at least one gasket is arranged between two adjacent auxiliary parts.

3. The winding body of the high voltage winding according to claim 2, characterized in that: The length of the gasket is equal to the distance between two adjacent auxiliary parts, so that two ends of the gasket respectively abut against the two auxiliary parts.

4. The winding body of the high voltage winding according to claim 2, characterized in that: The auxiliary component is connected to the winding plate by clamping.

5. The winding body of the high voltage winding according to claim 4, characterized in that: A slot is provided on the auxiliary component or the winding plate, and the winding plate is connected with the auxiliary component by means of the slot.

6. The winding body of the high voltage winding according to claim 5, characterized in that: The auxiliary component or the winding plate is fixed in the slot by an adhesive, and the adhesive is a two-component epoxy adhesive.

7. The winding body of the high voltage winding according to claim 2, characterized in that: The winding plate and the auxiliary component are formed separately and then bonded and fixed; or the winding plate and the auxiliary component are formed integrally.

8. The winding body of the high voltage winding according to claim 1, characterized in that: The winding body also includes a support tube, which is a hollow cylinder. A plurality of winding plates are evenly distributed on the outer circumference of the support tube, and the gasket is arranged closely against the support tube.

9. The winding body of the high voltage winding according to claim 1, characterized in that: The gasket is made of silicone rubber.

10. A high voltage winding, characterized in that: It comprises a winding body of a high-voltage winding as described in any one of claims 1 to 9, wherein the conductive wire is wound on the winding body to form a high-voltage coil, the high-voltage coil is entirely covered with a high-voltage insulating layer, and the high-voltage insulating layer wraps both ends of the winding body.

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