A winding body of a high voltage winding and a high voltage winding

Abstract

The present application discloses a winding body of a high-voltage winding, which is used to wind a conductor to form a high-voltage coil. The winding body includes: a plurality of winding plates, which are distributed along the circumference of the winding body, wherein the length direction of the plurality of winding plates is arranged along the axial direction of the winding body, and a plurality of winding grooves are arranged on the winding plates so that the winding plates form a plurality of comb teeth. A pad is provided in each winding groove of at least two adjacent winding plates, wherein the length direction of the pad is arranged along the circumference of the winding body, and the pad is located in the middle of the comb teeth; a plurality of auxiliary parts, wherein the plurality of auxiliary parts are annular and arranged at intervals along the axial direction of the winding body, and the plurality of winding plates are fixedly connected to the auxiliary parts. The present application forms an installation space for an airway part between two adjacent winding plates by arranging a pad so as to form an airway, thereby improving the heat dissipation performance of the high-voltage winding, saving manufacturing cost and installation cost, and improving the competitive advantage of the product. The present application also discloses a high-voltage winding.

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] The pancake-shaped high-voltage winding of the current dry-type transformer usually uses a rigid comb plate as the winding structure, and a winding slot is formed between any two adjacent comb teeth. When winding, it is generally necessary to start winding from one end of the rigid comb plate, and wind the designed number of turns in the first winding slot on the rigid comb plate according to the pancake winding method to form the first pancake coil, and then continue to wind the second pancake coil in the winding slot or the next winding slot until all coils are fully wound. Since pancake coils usually need to be wound after one pancake coil is wound before the next pancake coil can be wound, it is difficult to set a cooling air duct inside the pancake coil to dissipate heat from the high-voltage winding. The common solution to this problem is to use larger-gauge wires to avoid coil heating and affect the performance of the high-voltage winding, but this method will lead to an increase in the amount of iron core and wire, an increase in product volume, and thus increase production costs and installation costs, causing the product to lose its competitive advantage. Summary of the invention

[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 space for installing an air duct component is formed between two adjacent winding plates by arranging a gasket so as to form an air duct, thereby improving the heat dissipation performance of the high-voltage winding, saving manufacturing cost and installation cost, and improving the competitive advantage of the product.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a winding body of a high-voltage winding, used for winding a conductor to form a high-voltage coil, the winding body comprising: a plurality of winding plates, distributed along the circumference of the winding body, the length direction of the plurality of winding plates being arranged along the axial direction of the winding body, a plurality of winding grooves being arranged on the winding plates so that the winding plates form a plurality of comb teeth, a pad being provided in each winding groove of at least two adjacent winding plates, the length direction of the pad being arranged along the circumference of the winding body, and the pad being located in the middle of the comb teeth; a plurality of auxiliary parts, the plurality of auxiliary parts being annular and arranged at intervals along the axial direction of the winding body, and the plurality of winding plates being fixedly connected to the auxiliary parts.

[0006] The winding board is clamped on the inner periphery of the auxiliary parts, and the plurality of auxiliary parts include two first auxiliary parts and at least one second auxiliary part. The first auxiliary part is clamped on the end of the winding board, and the second auxiliary part is clamped on the middle of the winding board.

[0007] Among them, a plurality of first grooves are arranged on one side plate surface of the two first auxiliary parts, and the plurality of first grooves are arranged corresponding to the plurality of winding plates for accommodating the comb teeth at the ends of the winding plates.

[0008] Among them, a limit block is provided between two adjacent comb teeth at the end of the winding plate, and a plurality of second grooves are provided on the other side plate surface of the first auxiliary component. The plurality of second grooves are provided corresponding to the plurality of winding plates for being connected with the limit block.

[0009] Wherein, a plurality of flow grooves are arranged on the inner side of the first auxiliary component.

[0010] A plurality of first airway holes are arranged in the middle of the first auxiliary component, and the plurality of first airway holes are distributed at intervals along the circumference of the winding body.

[0011] Wherein, a plurality of second airway holes are arranged on the middle part or the outer side plate surface of the second auxiliary component, and the plurality of second airway holes correspond one to one with the plurality of first airway holes.

[0012] The cushion block is an arc-shaped block, and the curvature of the cushion block matches the circumference of the winding body.

[0013] Among them, L-shaped grooves are provided on both sides of the comb teeth. The two L-shaped grooves are arranged back to back and symmetrically distributed along the length direction of the winding plate, so that two limiting steps are formed on both sides of the middle part of the comb teeth.

[0014] Among them, a mounting groove is provided in the middle of one side of the cushion block, and the mounting groove is arranged along the radial direction of the winding body. The cushion block is clamped on the limiting step of the comb teeth through the mounting groove.

[0015] Among them, a cross-line groove is provided on the other side of the cushion block where the installation groove is not provided. The cross-line groove is inclined so that an inlet is formed on the bottom side of one end of the cushion block, and an outlet is formed on the top side of the other end of the cushion block.

[0016] The depth of the cross-line trough matches the width of the conductor.

[0017] A plurality of supporting parts are arranged on the other side of the winding plate where the comb teeth are not arranged. The plurality of supporting parts are arranged along the radial direction of the winding body and are distributed at intervals along the axial direction of the winding body.

[0018] The winding body further comprises a plurality of support members which are fixed at intervals along the circumference of the winding body on the inner circumference of the auxiliary member, and the length direction of the support members is arranged along the axial direction of the winding body.

[0019] The second purpose of the present application is to provide a high-voltage winding, including the winding body of the aforementioned high-voltage winding, the 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 a plurality of axial air passages are provided in the high-voltage insulation layer.

[0020] The beneficial effects of the present application are as follows: different from the prior art, the present application forms an installation space for the air duct component between two adjacent winding plates by arranging a gasket so as to form an air duct, thereby improving the heat dissipation performance of the high-voltage winding, saving manufacturing cost and installation cost, and improving the competitive advantage of the product; the gasket can also play a certain supporting role for the wires in the winding slot, further ensuring that the wires are wound securely.

[0021] At the same time, the present application arranges a plurality of support parts on the other side of the winding plate where the comb teeth are not arranged to abut the outer peripheral surface of the winding tooling. On the one hand, under the high temperature conditions of the injection molding of the high-voltage insulation layer, the winding plate will not soften and deform due to the high temperature, causing the high-voltage coil to lack support, thereby effectively avoiding the inward deformation of the high-voltage coil and ensuring the quality of the high-voltage winding; on the other hand, the winding plate does not need to be arranged very wide to meet the strength design requirements, which can reduce the space required for the winding part, thereby reducing the amount of wire and silicone rubber used, effectively reducing costs, and the size of the high-voltage winding of the same voltage level can also be smaller, saving floor space.

[0022] In addition, the present application fixes the winding plate on the inner circumference of the auxiliary part, and all the winding plates can be tightened to the theoretical position through the tension force of the wire winding. The winding plate and the auxiliary parts can be stably assembled without grinding the auxiliary parts and the winding tooling one by one, which greatly saves labor and improves assembly efficiency. It also effectively avoids the possibility of the winding part moving on the surface of the winding tooling, thereby preventing the high-voltage coil from being deformed due to uneven injection pressure during injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of a dry-type transformer 10 according to one embodiment of the present application;

[0024] Figure 2 is a top view of a dry-type transformer 10 according to an embodiment of the present application;

[0025] Figure 3 is a front view of an assembled core 110 according to an embodiment of the present application;

[0026] Figure 4 yes Figure 2 Enlarged view of G in the middle;

[0027] Figure 5 is a three-dimensional schematic diagram of a winding body 1310 according to an embodiment of the present application;

[0028] Figure 6is a three-dimensional schematic diagram of a winding plate 1313 according to an embodiment of the present application;

[0029] Figure 7 is a three-dimensional schematic diagram of a first auxiliary member 13111 according to an embodiment of the present application;

[0030] Figure 8 is a three-dimensional schematic diagram of a second auxiliary member 13112 according to an embodiment of the present application;

[0031] Fig. 9 is a three-dimensional schematic diagram of a cushion block 1410 according to an embodiment of the present application;

[0032] Fig.10 is a three-dimensional schematic diagram of a cushion block 1410 according to another embodiment of the present application;

[0033] Fig.11 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;

[0034] Fig.12 is a three-dimensional schematic diagram of a high-voltage winding 130 according to an embodiment of the present application;

[0035] Fig.13 is a schematic circuit diagram of a high voltage coil 1320 according to an embodiment of the present application;

[0036] Fig.14 It is a partial cross-sectional view of the high-voltage winding 130 according to one embodiment of the present application. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] like Figure 1-Figure 3 As shown, the dry-type transformer 10 is a three-phase transformer, namely the 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 structure or a triangular structure, and the three transformers 100 are symmetrically structured. In addition, the dry-type transformer 10 can also be an isolation transformer, a frequency conversion transformer, a test transformer, etc.

[0040] In one embodiment, continue to refer to Figure 1-Figure 3 , the three transformers 100 are arranged to form a linear structure. 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 windings 120, and the high-voltage windings 130 are arranged in sequence from the inside to the outside. The iron core 110 includes three columnar iron core bodies 111, an upper yoke 112 located at the upper ends of the three columnar iron core bodies 111, and a lower 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 in sequence from the inside to the outside in one-to-one correspondence. The columnar iron core body 111 is formed by stacking multiple layers of silicon steel sheets, and is fixed by tying with a binding tape outside the multiple layers of silicon steel sheets. The radial cross-section of the columnar iron core body 111 is generally oval or circular or other shapes, as long as it can be accommodated in the hollow cavity of the low-voltage winding 120, and there is no limitation here. The upper yoke 112 and the lower yoke 113 are also formed by stacking multiple layers of silicon steel sheets to fixedly connect the three columnar iron core bodies 111, thereby forming a three-phase iron core 110 as shown in Figure 3 .

[0041] Combined with Figure 1 and Figure 2 shown, an iron core clamp 140 is provided on the outer side of the iron core 110. The iron core clamp 140 is formed by connecting three clamps to form a structure similar to a channel steel, that is, the iron core clamp 140 is integrally in a "C" shape structure. Of course, in other embodiments, the iron core clamp can also be a hollow pipe fitting, that is, the iron core clamp is formed by connecting several clamp pieces of plate structures and surrounding to form a closed structure, making the structure of the iron core clamp more stable.

[0042] Among them, the iron 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 can also be integrally formed with other composite materials, and there is no limitation here.

[0043] Fiber reinforced composite materials refer to composite materials formed by winding, molding or pultrusion of reinforcing fiber materials, such as glass fiber, aramid fiber, etc., with matrix materials. The core clamp 140 made of fiber reinforced composite materials has low cost, light weight, good mechanical properties, and low carbon emissions during the production process of fiber reinforced composite materials, which is greener and more environmentally friendly.

[0044] Combination Figure 2 and Figure 4 As shown, the low-voltage winding 120 includes a copper foil 121, a low-voltage insulating layer 122 and a support bar 123, and the copper foil 121 and the low-voltage insulating layer 122 are alternately arranged. Specifically, the copper foil 121 is formed by winding a whole copper foil, and the low-voltage insulating layer 122 and the copper foil 121 are overlapped and wound together. At least one heat dissipation air channel is provided in the low-voltage winding 120, and the heat dissipation air channel is located between the adjacent copper foil 121 and the low-voltage insulating layer 122, and the support bar 123 is located in the heat dissipation air channel, which is used to support and isolate the adjacent copper foil 121 and the low-voltage insulating layer 122. The support bar 123 is an insulating support bar 123, and a plurality of insulating support bars 123 are provided in each layer of the heat dissipation air channel. The plurality of insulating support bars 123 are arranged at intervals along the circumferential direction of the outer peripheral surface of the copper foil 121, and at the same time play a role in supporting the adjacent copper foil 121 and the low-voltage insulating layer 122. There are at least two insulating support bars 123 arranged in each layer of heat dissipation air duct, which can be two, three, four or more. Preferably, multiple insulating support bars 123 of the same layer are evenly spaced along the circumference 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 when the dry-type transformer 10 is running, and avoid overheating failure. Among them, the heat dissipation air duct can be set in one layer, or in two or more layers, which is not limited here.

[0045] 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 insulation and heat resistance grades of dry-type transformers.

[0046] 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.

[0047] like Figure 5-Figure 14As shown, the high-voltage winding 130 includes a winding body 1310, a high-voltage coil 1320 and a high-voltage insulation layer 1330, and the wire is wound on the winding body 1310 to form the high-voltage coil 1320. The winding body 1310 includes a winding portion 1312, 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 spaced apart along the axial direction of the winding body 1310.

[0048] The winding part 1312 includes a plurality of winding plates 1313. The length direction of the plurality of winding plates 1313 is arranged along the axial direction of the winding body 1310 and is evenly distributed along the circumference of the winding body 1310. A plurality of winding grooves 1314 are arranged on the winding plates 1313 so that a plurality of comb teeth are formed on one side of the winding plates 1313 for winding the wire. 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.

[0049] 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 winding body 1310. The winding grooves 1314 on the winding plate 1313 are arranged along the radial direction of the winding body 1310 and are spaced apart along the axial direction of the winding body 1310, so that a plurality of comb teeth are formed on one side of the winding plate 1313. The height of the comb teeth on the winding plate 1313 along the axial direction of the winding body 1310 is defined as the tooth height. The tooth height of the comb teeth in the middle of the winding plate 1313 is greater than the tooth height of the comb teeth in other parts. This is because the middle of the winding plate 1313 needs to lead out the tap of the tap line. If the tooth height in the middle of the winding plate 1313 is set a little larger, the distance between the corresponding two adjacent winding grooves 1314 will be larger, and space can be reserved for placing the tap led out from the middle of the winding plate 1313. Furthermore, the radial length of the comb teeth at the ends and the middle of the winding plate 1313 along the winding body 1310 is shorter than the length of the comb teeth in other parts. Setting the comb teeth at the ends of the winding plate 1313 to be smaller can save materials and reduce costs while ensuring the strength of the winding plate 1313; setting the comb teeth in the middle of the winding plate 1313 to be smaller can leave space for placing the tap led out from the middle of the winding plate 1313.

[0050] At least one coil is arranged between two adjacent comb teeth on the winding plate 1313, so that a wire is wound in each winding groove 1314, the high-voltage coil 1320 is arranged in a reasonable distribution, and each coil is arranged at intervals. Specifically, when a plurality of winding plates 1313 are evenly distributed in the circumferential direction, the winding grooves 1314 on all winding plates 1313 are matched one by one in the circumferential direction of the winding body 1310, and each coil is wound by a wire in a corresponding circle of winding grooves 1314 on all winding plates 1313 along the circumferential direction of the winding body 1310, with balanced force and good mechanical strength.

[0051] In other embodiments, in order to allow for the setting positions of the taps, several winding boards may also be arranged unevenly. For example, the distance between two adjacent winding boards is greater than the distance between any other two adjacent winding boards. In this case, each tap is led out from between the two adjacent winding boards. In this way, the tooth height of the comb teeth in the middle of the winding board does not need to be set larger, and the setting positions of each tap can be reserved.

[0052] A pad 1410 is provided in each winding groove 1314 on at least two adjacent winding plates 1313, which is used to prepare a high-voltage winding 130 with an air duct. The length direction of the pad 1410 is arranged along the circumference of the winding body 1310, and in the length direction of the comb teeth, the pad 1410 is located in the middle of the comb teeth, which is used to separate the wires on the comb teeth to form an installation space for the air duct parts, so that the wires can be separated by the pad 1410 when they are wound in the winding groove 1314 provided with the pad 1410, and then the installation space for the air duct parts is formed between two adjacent winding plates 1313, so that in the subsequent injection molding process of the high-voltage insulating layer 1330, the air duct parts occupy a certain space to form an air duct, thereby improving the heat dissipation performance of the high-voltage winding 130. Compared with high-voltage windings of the same voltage level but without air ducts, the high-voltage winding 130 of the present application does not need to use larger-sized wires to avoid heat, and the amount of iron core does not need to be increased, which can save manufacturing costs and installation costs and improve the competitive advantage of the product. In addition, the pad 1410 can also provide some support for the wires in the winding groove 1314, further ensuring that the wires are wound securely.

[0053] Among them, the airway piece can be a structure such as an airway plate, an airway tube, an airway rod, etc., as long as the airway piece can occupy a certain space in the corresponding installation space formed by the cushion block 1410, so as to facilitate the subsequent formation of the airway, and the cross-sectional shape of the airway piece can be selected according to the airway structure design, and no specific restrictions are made here. It can be understood that when the airway piece is a solid structure such as an airway rod, an airway plate, etc., after the high-voltage insulation layer 1330 is formed, the airway can be formed by pulling out the airway piece; when the airway piece is a hollow structure such as an airway tube, after the high-voltage insulation layer 1330 is injected, the airway can be directly formed without pulling out the airway tube.

[0054] like Fig. 9As shown, the pad 1410 can be an arc-shaped block, and the curvature of the pad 1410 matches the circumference of the winding body 1310. In this way, when the length direction of the pad 1410 is arranged along the circumference of the winding body 1310, the inner side surface of the pad 1410 close to the bottom of the comb teeth and the outer side surface away from the bottom of the comb teeth are matched with the circumference of the winding body 1310, so that the circumference of the coil on both sides of the pad 1410 is consistent, ensuring that the coil is balanced, thereby ensuring the quality of the high-voltage winding 130. In other embodiments, the pad can also be a rectangular parallelepiped structure, as long as it can form an installation space for the airway component, and no specific limitation is made here.

[0055] In this embodiment, the pad 1410 is clamped and connected to the middle of the comb teeth, so that the pad 1410 can be stably set in the winding groove 1314. Specifically, L-shaped grooves 1411 are provided on both sides of the comb teeth on the winding plate 1313 where the pad 1410 needs to be installed. The two L-shaped grooves 1411 are arranged opposite to each other and are symmetrically distributed along the length direction of the winding plate 1313, so that the cross-section of the comb teeth along the radial direction of the winding body 1310 is "convex", so that two limiting steps 1412 are formed on both sides of the middle of the comb teeth for installing the pad 1410. Correspondingly, a mounting groove 1413 is provided in the middle of one side of the pad 1410, and the mounting groove 1413 is arranged along the radial direction of the winding body 1310. The pad 1410 is clamped on the limiting step 1412 of the comb teeth through the mounting groove 1413, so that the pad 1410 can be stably clamped in the middle of the comb teeth.

[0056] The height of the spacer 1410 along the axial direction of the winding body 1310 is defined as the height of the spacer 1410 , the width of the spacer 1410 along the radial direction of the winding body 1310 is defined as the width of the spacer 1410 , and the length of the spacer 1410 along the circumferential direction of the winding body 1310 is defined as the length of the spacer 1410 . The height of the mounting groove 1413 on the pad 1410 can be set to be slightly less than or equal to the axial width of the winding groove 1314 along the winding body 1310, so as to ensure that the pad 1410 can be accommodated in the winding groove 1314 after being clamped on the comb teeth, thereby ensuring the support effect for the wire in the winding groove 1314; the width of the pad 1410 is directly related to the radial width of the airway component installation space formed along the winding body 1310, and can be adjusted according to the airway design requirements of the high-voltage winding 130; the length of the pad 1410 can be adjusted according to the support requirements of the wire and the installation requirements of the airway component, as long as the pads 1410 installed on two adjacent winding plates 1313 do not interfere with each other, and no specific restrictions are made here.

[0057] Furthermore, both ends of the bottom wall of the mounting groove 1413 on the pad 1410 may be provided with rounded corners to facilitate assembly of the pad 1410 with the winding plate 1313. Both ends of the pad 1410 along its length direction may also be provided with rounded corners to prevent the edges and corners of both ends of the pad 1410 from being too sharp, thereby damaging the insulating layer on the surface of the wire and affecting the insulation performance of the high-voltage winding 130; and both sides of the pad 1410 along its length direction may also be provided with chamfered corners to facilitate the flow of silicone rubber in the subsequent injection molding process, ensure the uniform stability of the high-voltage insulation layer 1330, and thus ensure the quality of the high-voltage winding 130.

[0058] Furthermore, if Fig.10 As shown, the other side of the cushion block 1410 where the installation groove 1413 is not provided may be provided with a cross-wire groove 1414, and the cross-wire groove 1414 is inclined so that a line inlet 1415 is formed on the bottom side of one end of the cushion block 1410, and a line outlet 1416 is formed on the top side of the other end of the cushion block 1410, so as to facilitate the transition and winding of the wire from the inside of the cushion block 1410 through the cushion block 1410 to the outside of the cushion block 1410.

[0059] The size of the wire inlet 1415 and the wire outlet 1416 can be larger than the cross-sectional size of the wire, so that the wire can be easily passed through the wire inlet 1415 and passed through the wire crossing slot 1414 and then passed out from the wire outlet 1416, which is simple to operate and highly efficient. In addition, the positions of the wire inlet 1415 and the wire outlet 1416 can be specifically set to be that the wire inlet 1415 is located on the inner side surface of one end of the cushion block 1410 close to the bottom of the comb teeth, and the wire outlet 1416 is located on the outer side surface of the other end of the cushion block 1410 away from the bottom of the comb teeth, so that the wire crossing slot 1414 extends obliquely from the inner side surface of the cushion block 1410 to the outer side surface of the cushion block 1410; or, the wire inlet 1415 is located on the bottom side of the end surface of one end of the cushion block 1410, and the wire outlet 1416 is located on the top side of the end surface of the other end of the cushion block 1410, so that the wire crossing slot 1414 extends obliquely from the inner side surface of the cushion block 1410 to the outer side surface of the cushion block 1410. The end face is inclined and extends to the other end face of the cushion block 1410; or, the line inlet 1415 is located on the inner side face of one end of the cushion block 1410 close to the bottom of the comb teeth, and the line outlet 1416 is located on the top side of the end face of the other end of the cushion block 1410, so that the cross-wire slot 1414 extends from the inner side face of the cushion block 1410 to the other end face of the cushion block 1410; or, the line inlet 1415 is located on the bottom side of the end face of one end of the cushion block 1410, and the line outlet 1416 is located on the outer side face of the other end of the cushion block 1410 away from the bottom of the comb teeth. As long as the transition winding of the wire can be achieved, no specific limitation is made here.

[0060] The depth of the cross-wire groove 1414 along the axial direction of the winding body 1310 is defined as the depth of the cross-wire groove 1414, and the width of the cross-wire groove 1414 along the radial direction of the winding body 1310 is defined as the width of the cross-wire groove 1414; the width of the wire along the axial direction of the winding body 1310 is defined as the width of the wire, and the thickness of the wire along the radial direction of the winding body 1310 is defined as the thickness of the wire. The depth of the cross-wire groove 1414 matches the width of the wire, and the width of the cross-wire groove 1414 matches the thickness of the wire. In an application scenario, a pancake coil is set in each winding groove 1314, and the depth of the cross-wire groove 1414 can be set to be slightly larger than or equal to the width of the wire, and the width of the cross-wire groove 1414 can be slightly larger than or equal to the thickness of the wire, so that it is convenient for the wire to be passed through the winding groove 1414, and the efficiency of the cross-wire operation is improved.

[0061] Furthermore, notches 1418 may be provided at both side ends of the pad 1410, so that after the wire is wound a set number of turns in a certain circle of winding groove 1314, it can be guided from the notch 1418 into the next adjacent circle of winding groove 1314 to continue winding without being interfered by the pad 1410 in the circle of winding groove 1314. The shape and size of the notch 1418 can be specifically designed according to the winding requirements and are not specifically limited here.

[0062] Furthermore, a plurality of support portions 1315 are provided on the other side of the winding plate 1313 where no comb teeth are provided, for abutting against the winding tooling, that is, the support portion 1315 and the comb teeth are respectively located on two opposite sides of the winding plate 1313, and a plurality of support portions 1315 are provided along the radial direction of the winding body 1310 and are distributed at intervals along the axial direction of the winding body 1310, and a plurality of support portions 1315 abut against the outer peripheral surface of the winding tooling, so that under the high temperature condition of injection molding the high-voltage insulation layer 1330, the winding plate 1313 will not soften and deform due to the high temperature, resulting in a lack of support for the high-voltage coil 1320, thereby effectively avoiding the inward deformation of the high-voltage coil 1320 and ensuring the quality of the high-voltage winding 130. In addition, the setting of the support portion 1315 makes it possible to meet the strength design requirements by not setting a large distance between the bottom surface of the winding groove 1314 of the winding plate 1313 and the side surface of the winding plate 1313 where no comb teeth are set. This can reduce the space required for the winding portion 1312, thereby reducing the amount of wire used in the high-voltage coil 1320 and the amount of silicone rubber used in the high-voltage insulation layer 1330, effectively reducing costs, and the size of the high-voltage winding 130 of the same voltage level can also be smaller, saving floor space.

[0063] The width of the support portion 1315 on the winding plate 1313 along the axial direction of the winding body 1310 is defined as the width of the support portion 1315. The width of the support portion 1315 at both ends of the winding plate 1313 and the width of the support portion 1315 in the middle of the winding plate 1313 are greater than the width of the support portion 1315 in other parts of the winding plate 1313. This is because the two ends of the winding plate 1313 need to be grooved to be fixed with the auxiliary member 1311. Setting the width of the support portion 1315 at the end of the winding plate 1313 a little larger can ensure that the groove at the end of the winding plate 1313 will not weaken its mechanical strength, and the support portion 1315 can provide sufficient support for the end of the high-voltage coil 1320. For example, the support portion 1315 and the winding groove 1311 at the end of the winding plate 1313 can be set 314 corresponds to the position and one end of the support portion 1315 extends to be flush with the end surface of the winding plate 1313; and since the tooth height of the comb teeth in the middle of the winding plate 1313 is relatively large, the distance between two adjacent winding grooves 1314 is also relatively large. The width of the support portion 1315 in the middle of the winding plate 1313 is set to be larger, which can ensure that the support portion 1315 can provide sufficient support for the middle of the high-voltage coil 1320. For example, the support portion 1315 can be set to correspond to the position of two adjacent winding grooves 1314 in the middle of the winding plate 1313, that is, the width of the support portion 1315 can cover the two adjacent winding grooves 1314.

[0064] At the same time, the area where the support portion 1315 with a larger width is located is defined as a wide support area, and the area where the support portion 1315 with a smaller width is located is defined as a narrow support area. Then, through the above-mentioned arrangement, the winding plate 1313 forms a first wide support area, a first narrow support area, a second wide support area, a second narrow support area, and a third wide support area in sequence from one end to the other end along the axial direction of the winding body 1310. Furthermore, the first wide support area and the third wide support area are symmetrically arranged with respect to the second wide support area, and the first narrow support area and the second narrow support area are symmetrically arranged with respect to the second wide support area, so that each support portion 1315 can support the high-voltage coil 1320 more evenly and stably. Of course, it can also be arranged asymmetrically, and no specific limitation is made here.

[0065] Further, at least a portion of the support portion 1315 is arranged corresponding to the winding groove 1314. In an application scenario, each support portion 1315 in the portion is arranged corresponding to a winding groove 1314. For the convenience of description, the support portion 1315 in the portion is defined as a first support portion, that is, the support portion 1315 of the portion includes a plurality of first support portions, each of which is arranged on the other side of the winding plate 1313 where no comb teeth are arranged and is located between the extension lines of the two adjacent comb teeth corresponding thereto, and the width of each first support portion is substantially equal to the width of the corresponding winding groove 1314 along the axial direction of the winding body 1310. For example, the first narrow support area and the second narrow support area on the winding plate 1313 are both arranged with the first support portion in the above manner, so that the two areas can better support the corresponding section of the coil through the first support portion, further avoiding the inward deformation of the high-voltage coil 1320. It can be understood that the number and setting area of ​​the first support portion are not specifically limited.

[0066] In another application scenario, at least a portion of the support portion 1315 is arranged corresponding to at least two adjacent winding grooves 1314, and each support portion 1315 in the portion is arranged corresponding to at least two adjacent winding grooves 1314. For the convenience of expression, the support portion 1315 in the portion is defined as a second support portion, that is, the portion of the support portion 1315 includes a plurality of second support portions, each of which is arranged on the other side of the winding plate 1313 where no comb teeth are arranged and is located between the extension lines of the comb teeth at both ends of the corresponding plurality of winding grooves 1314, and the width of each second support portion is approximately equal to the sum of the width of the corresponding plurality of winding grooves 1314 along the axial direction of the winding body 1310 and the tooth height of the comb teeth between the corresponding plurality of winding grooves 1314. For example, a second support portion is arranged corresponding to two adjacent winding grooves 1314, and the second support portion is located between the two corresponding The second support portion is located between the extension lines of the comb teeth at both ends of the winding grooves 1314, and the width of the second support portion is approximately equal to the sum of the width of the two winding grooves 1314 along the axial direction of the winding body 1310 and the tooth height of the comb teeth between the two winding grooves 1314. For another example, a second support portion is arranged corresponding to three adjacent winding grooves 1314, and the second support portion is located between the extension lines of the comb teeth at both ends of the corresponding three winding grooves 1314, and the width of the second support portion is approximately equal to the sum of the width of the three winding grooves 1314 along the axial direction of the winding body 1310 and the tooth height of the two comb teeth between the three winding grooves 1314. The first wide support area, the second wide support area, and the third wide support area are all arranged in the above manner, so that the three areas can better support the two ends and the middle part of the high-voltage coil 1320 through the second support portion, and further avoid the inward deformation of the high-voltage coil 1320. It can be understood that the number and setting area of ​​the second support portion can be designed according to specific needs, and no specific restrictions are made here.

[0067] Furthermore, on each winding plate 1313, a support portion 1315 is provided for each of a number of adjacent winding grooves 1314, for example, a support portion 1315 is provided for each of two adjacent winding grooves 1314, or a support portion 1315 is provided for each of three adjacent winding grooves 1314, so that the number of support portions 1315 can be reduced, and while ensuring the support effect for the high-voltage coil 1320, the structure of the winding plate 1313 is simpler and easier to manufacture. The width and specific setting position of the support portion 1315 can be adjusted according to the support requirements, and no specific restrictions are made here.

[0068] Through the above-mentioned arrangement, the several support portions 1315 on each winding plate 1313 have a serrated structure as a whole. When the winding portion 1312 is fixed on the winding tooling and the support portion 1315 abuts against the outer circumference of the winding tooling, a number of spaced channels will be formed between the winding plate 1313 and the outer circumference of the winding tooling, which can be used to circulate the injected silicone rubber raw material, so that the injection effect is more uniform and the efficiency is higher; at the same time, compared with the winding plate without the support portion 1315, the side without the comb teeth abuts against the outer circumference of the winding tooling, and the winding plate may be damaged due to directly bearing a large injection pressure. During the injection process of the winding plate 1313 of the present application, the silicone rubber raw material can flow from one side of the winding plate 1313 to the other side through the above-mentioned channel, effectively buffering the impact force of the silicone rubber raw material on the winding plate 1313, and preventing the large injection pressure from damaging the winding plate 1313.

[0069] Furthermore, the support portion 1315 is smoothly connected to the winding plate 1313, that is, the radial cross-section of each support portion 1315 along the winding body 1310 is roughly trapezoidal, and the lower base of the trapezoid is connected to the side of the winding plate 1313, so that the waist of the trapezoid and the side of the winding plate 1313 have a smooth transition, which can improve the connection strength between the support portion 1315 and the winding plate 1313, and avoid when the width of the support portion 1315 is smaller than the width of the corresponding winding groove 1314, the distance between the bottom surface of the winding groove 1314 and the other side surface of the winding plate 1313 where the support portion 1315 is set is too small, thereby weakening the mechanical strength of the winding plate 1313, and making it difficult for the winding plate 1313 to withstand the large injection pressure during the injection of the high-voltage insulation layer 1330 and be damaged.

[0070] In this embodiment, the winding plate 1313 is 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 rectangular glass fiber reinforced plastic plate, and the winding groove 1314 and the support portion 1315 are formed by lathe, thereby forming the winding plate 1313, which uses the least material and can save costs. In other embodiments, the comb-shaped winding plate can also be directly formed by integral casting and curing to simplify the process, and the material of the winding plate is consistent with the above, which will not be repeated.

[0071] The winding body 1310 further includes a plurality of auxiliary parts 1311, which are annular and spaced apart along the axial direction of the winding body 1310, and the auxiliary parts 1311 are connected by clamping with the winding plate 1313. The winding body 1310 omits the structure of the rigid insulating inner liner, so that the heat conduction effect of the high-voltage winding 130 is better, and the interface between the high-voltage insulation layer and the rigid insulating inner liner of the traditional high-voltage winding is eliminated, thereby suppressing the discharge on the surface of the rigid insulating inner liner, saving materials and reducing costs.

[0072] The winding plate 1313 is fixedly arranged on the inner circumference of several auxiliary parts 1311 along the axial direction of the auxiliary part 1311, so that the winding plate 1313 is connected to all auxiliary parts 1311 at the same time, and several winding plates 1313 are evenly distributed along the circumference of the auxiliary part 1311. Among them, the axial direction of the auxiliary part 1311, the axial direction of the winding part 1312, the axial direction of the winding body 1310, and the axial direction of the high-voltage winding 130 are all in the same direction. The auxiliary part 1311 can be a circular ring or an elliptical ring, and can be designed according to the overall shape of the high-voltage winding 130. The auxiliary part 1311 can maintain the stable setting of the winding plate 1313, and prevent the winding plate 1313 from moving and dislocating during the wire winding process and the injection process of the high-voltage insulation layer 1330, causing the high-voltage coil 1320 to deviate and affect the quality of the high-voltage winding 130; and compared with the winding body structure in which the winding plate is fixed on the outside of the auxiliary part, the winding plate 1313 is fixed on the inside of the auxiliary part 1311 in the present application, and all the winding plates 1313 can be fixed by the tension force of the wire winding. When the periphery of the winding tooling is tightened to the theoretical position, there is no need for the auxiliary parts 1311 to provide corresponding support, and there is no need to grind the auxiliary parts 1311 and the winding tooling one by one, so that the winding plate 1313 and the auxiliary parts 1311 can be firmly assembled, which greatly saves labor and improves assembly efficiency. It also effectively avoids the winding part 1312 from moving on the surface of the winding tooling, thereby preventing the high-voltage coil 1320 from being deformed due to uneven injection pressure, thereby ensuring the quality of the high-voltage winding 130.

[0073] The auxiliary member 1311 and the winding plate 1313 are provided with corresponding slots, and the two are connected by the slots that match each other. The inner surface of the auxiliary member 1311 is provided with a plurality of first slots 1316, and the plurality of first slots 1316 are evenly arranged along the circumference of the auxiliary member 1311, and the number of the first slots 1316 is equal to the number of the winding plates 1313; a plurality of second slots 1317 are correspondingly arranged on one side of the winding plates 1313 where the comb teeth are arranged, and the plurality of second slots 1317 are arranged at intervals along the length direction of the winding plates 1313, and the number of the second slots 1317 is equal to the number of the auxiliary members 1311; the plurality of winding plates 1313 are respectively correspondingly arranged in the first slots 1316 of the plurality of auxiliary members 1311 through the second slots 1317, so that the plurality of winding plates 1313 are evenly distributed on the inner circumference of the plurality of auxiliary members 1311 in the circumferential direction. At the same time, the first slots 1316 on all auxiliary parts 1311 are matched one by one in the axial direction of the auxiliary parts 1311, so that each winding plate 1313 can be arranged along the axial direction of the auxiliary part 1311, and then the wire is wound in the comb teeth on the winding plate 1313 to form a high-voltage coil 1320, that is, several sections of the high-voltage coil 1320 are spaced apart and distributed in the axial direction of the winding part 1312, with balanced force and good mechanical strength.

[0074] In this embodiment, the plurality of auxiliary components 1311 include two first auxiliary components 13111 and at least one second auxiliary component 13112. Figure 5 , Figure 7 and Figure 8 As shown, the first auxiliary member 13111 is clamped at the end of the winding plate 1313, and a second auxiliary member 13112 is provided to be clamped in the middle of the winding plate 1313. In other embodiments, the number of the first auxiliary member and the second auxiliary member can be adjusted according to the design requirements of the high-voltage winding, for example, including two first auxiliary members, two or three or more second auxiliary members, the first auxiliary member is clamped at the end of the winding plate, and the plurality of second auxiliary members are clamped in the middle of the winding plate at intervals along the axial direction of the winding body; and the first auxiliary member can also be clamped in the middle of the winding plate, and the second auxiliary member can also be clamped at the end of the winding plate, as long as the comb structure of the winding plate is adjusted accordingly, and no specific limitation is made here.

[0075] The inner surface of the first auxiliary part 13111 is provided with a plurality of first slots 1316, and the winding slot 1314 at the end of the winding plate 1313 is provided with a second slot 1317. The second slot 1317 is arranged close to the comb teeth at the end of the winding plate 1313, so that when the winding plate 1313 is installed in the first slot 1316 of the first auxiliary part 13111, the first auxiliary part 13111 can abut against the inner wall of the comb teeth at the end of the winding plate 1313, which can ensure that the connection between the first auxiliary part 13111 and the winding plate 1313 is tighter and does not affect the winding of the coil in the winding slot 1314 at the end of the winding plate 1313. A plurality of first slots 1316 are provided on the inner surface of the second auxiliary component 13112, and a second slot 1317 is provided on the top of the comb teeth in the middle of the winding plate 1313, so that when the winding plate 1313 is installed in the first slots 1316 of the second auxiliary component 13112, the winding of the coil in the winding slot 1314 in the middle of the winding plate 1313 is not affected.

[0076] The width of the first slot 1316 along the circumferential direction of the auxiliary member 1311 is defined as the slot width of the first slot 1316, the width of the second slot 1317 along the length direction of the winding plate 1313 is defined as the slot depth of the second slot 1317, the width of the winding plate 1313 along the circumferential direction of the winding body 1310 is defined as the thickness of the winding plate 1313, the slot width of the first slot 1316 matches the thickness of the winding plate 1313, the slot depth of the second slot 1317 matches the thickness of the auxiliary member 1311 at the first slot 1316, so that the winding plate 1313 It is firmly assembled with the auxiliary part 1311 to avoid the situation where the width of the first slot 1316 is smaller than the thickness of the winding board 1313 or the depth of the second slot 1317 is smaller than the thickness of the auxiliary part 1311 at the first slot 1316, which makes it difficult to fix the winding board 1313 on the auxiliary part 1311. It also avoids the situation where the width of the first slot 1316 is larger than the thickness of the winding board 1313 or the depth of the second slot 1317 is larger than the thickness of the auxiliary part 1311 at the first slot 1316, which makes it impossible to firmly match and cause the winding board 1313 to fall off from the inner side of the auxiliary part 1311.

[0077] Furthermore, the winding plate 1313 is fixed to the auxiliary part 1311 by an adhesive, that is, the second slot 1317 of the winding plate 1313 is fixedly connected to the first slot 1316 of the auxiliary part 1311 by an adhesive, which can make the connection between the winding plate 1313 and the auxiliary part 1311 more stable. The adhesive is a two-component high-temperature resistant epoxy adhesive, and of course it can also be other adhesives, but it is necessary to ensure that the adhesive can make the winding plate 1313 and the auxiliary part 1311 firmly bonded, and the adhesive needs to be resistant to high temperatures to adapt to the high-voltage insulation layer 1330 using high-temperature injection to cover the winding plate 1313 and the auxiliary part 1311.

[0078] Furthermore, a plurality of first grooves 1318 are provided on a side plate surface of each first auxiliary part 13111 close to the comb teeth at the end of the winding plate 1313. The plurality of first grooves 1318 are connected to a plurality of first slots 1316 one by one and are also provided corresponding to a plurality of winding plates 1313 for accommodating the comb teeth at the end of the winding plate 1313. A plurality of first grooves 1318 are arranged radially along the first auxiliary part 13111 and are evenly distributed circumferentially along the first auxiliary part 13111. The radial length of the first grooves 1318 along the first auxiliary part 13111 can be set correspondingly according to the length of the comb teeth at the end of the winding plate 1313. The width of the first grooves 1318 along the circumferential direction of the first auxiliary part 13111 matches the thickness of the winding plate 1313. The depth of the first grooves 1318 along the axial direction of the first auxiliary part 13111 matches the tooth height of the comb teeth at the end of the winding plate 1313. Therefore, when the second groove 1317 at the end of the winding plate 1313 is fixedly connected to the first groove 1316 of the first auxiliary part 13111, the comb teeth at the end of the winding plate 1313 can be accommodated in the first grooves 1318, and the two end surfaces of the winding plate 1313 are respectively flush with the plate surfaces of the two first auxiliary parts 13111 that are away from each other. Compared with the winding part structure of the winding plate protruding from the auxiliary part plate surface, the structure of the present application can effectively prevent the injection impact force generated by the high-temperature vulcanized silicone rubber when being injected outside the winding body 1310 from impacting the comb teeth at the end of the winding plate 1313, thereby causing the winding plate 1313 to be offset or even damaged, affecting the quality of the high-voltage winding 130.

[0079] Furthermore, a stopper 1417 is provided between two adjacent comb teeth at the end of the winding plate 1313, and the stopper 1417 is arranged along the radial direction of the first auxiliary member 13111. Correspondingly, a plurality of second grooves are provided on the other side plate surface of the first auxiliary member 13111, and the plurality of second grooves are arranged corresponding to the plurality of winding plates 1313, and are used for being connected with the stopper 1417 by clamping, that is, the plurality of second grooves are arranged along the radial direction of the first auxiliary member 13111 and are evenly distributed along the circumference of the first auxiliary member 13111, that is, the plurality of second grooves are also connected with the plurality of first clamping grooves 1316 and the plurality of first grooves 1318 in a one-to-one correspondence. The radial length of the second groove along the first auxiliary part 13111 can be set according to the radial length of the limit block 1417 along the winding body 1310, and can be specifically designed according to the connection requirements of the two; the circumferential width of the second groove along the first auxiliary part 13111 matches the circumferential width of the limit block 1417 along the winding body 1310, the axial depth of the second groove along the first auxiliary part 13111 matches the axial height of the limit block 1417 along the winding body 1310, and the distance between the comb teeth at the end of the winding plate 1313 and the adjacent limit block 1417 is equal to the distance between the first groove 1318 and the bottom of the second groove on the first auxiliary part 13111, so that the first auxiliary part 13111 can be firmly clamped on the limit block 1417 through the second groove 1417, thereby further improving the connection strength between the first auxiliary part 13111 and the winding plate 1313.

[0080] Furthermore, a plurality of flow grooves 1319 are provided on the inner side of the first auxiliary member 13111, so that during the injection molding process of the high-voltage insulating layer 1330, the injected silicone rubber raw material can flow from the end of the winding portion 1312 into the inner side of the winding portion 1312, thereby allowing the high-voltage insulating layer 1330 to fully fill the gap between the winding portion 1312 and the high-voltage coil 1320 and the two ends of the winding portion 1312. In this embodiment, four flow grooves 1319 are provided, and the four flow grooves 1319 are symmetrically arranged on the inner side of the first auxiliary member 1311, so that the injected silicone rubber raw material can flow more evenly and improve the injection quality. In other embodiments, one, two, three or more flow grooves may be provided, or they may be asymmetrically arranged, which is not specifically limited here.

[0081] The radial width of the auxiliary part 1311 along the winding body 1310 is defined as the width of the auxiliary part 1311, and the radial width of the winding plate 1313 along the winding body 1310 is defined as the width of the winding plate 1313. Since the first auxiliary part 13111 plays a main fixing role on the two ends of the winding plate 1313, and the second auxiliary part 13112 plays an auxiliary fixing role on the middle part of the winding plate 1313, setting the width of the first auxiliary part 13111 to be greater than the width of the second auxiliary part 13112 can reduce material usage and reduce costs while ensuring the stable assembly of the winding part 1312. The width of the first auxiliary member 13111 is substantially equal to the width of the winding plate 1313, which can ensure the stable assembly of the winding portion 1312 and prevent the winding plate 1313 from being damaged due to the large injection pressure during the injection of the high-voltage insulation layer 1330. On the other hand, it can also have a certain limiting effect on the coil wound in the winding groove 1314 at the end of the winding plate 1313, avoiding the displacement of the wire and affecting the quality of the high-voltage winding 130. The width of the second auxiliary member 13112 can be smaller than the width of the winding plate 1313, for example, it can be one-half, one-third, etc. of the width of the winding plate 1313, so that it can assist in fixing the winding plate 1313 while not affecting the high-voltage coil 1320 from leading out the tap in the middle of the winding plate 1313.

[0082] Furthermore, a plurality of first airway holes 1511 are provided in the middle of the first auxiliary component 13111, and the plurality of first airway holes 1511 are spaced apart along the circumference of the winding body 1310, for assisting in fixing the airway component. Specifically, the first airway holes 1511 are through holes, and the plurality of first airway holes 1511 and the plurality of pads 1410 are correspondingly arranged on the same circumferential surface of the winding body 1310, and the first airway holes 1511 are located between two adjacent winding plates 1313 on which the pads 1410 are installed, that is, the distance between the first airway holes 1511 and the inner side wall of the first auxiliary component 1311 is equal to the distance between the pad 1410 and the other side wall of the winding plate 1313 on which the comb teeth are not arranged, the radial dimension of the first airway holes 1511 along the winding body 1310 is equal to the width of the pad 1410, and the first airway holes 1511 are spaced apart from each other. 11 The circumferential dimension of the winding body 1310 is less than or equal to the distance between the corresponding pads 1410 on two adjacent winding plates 1313, so that the airway parts can be inserted into the corresponding first airway holes 1511 on the two first auxiliary parts 13111, so that they can be firmly installed in the installation space between the two adjacent winding plates 1313 with the pads 1410 without being interfered by the pads 1410, avoiding the loose displacement of the airway parts due to the large injection pressure impact during the injection process of the high-voltage insulation layer 1330, affecting the airway quality and the molding quality of the high-voltage insulation layer 1330.

[0083] Furthermore, a plurality of second airway holes 1512 are provided in the middle or outer surface of the second auxiliary component 13112, and the plurality of second airway holes 1512 correspond to the plurality of first airway holes 1511 one by one, and are used to further assist in fixing the airway component. It is understandable that when the width of the second auxiliary component 13112 is greater than the distance between the first airway hole 1511 and the inner wall of the first auxiliary component 1311, the second airway hole 1512 can be set in the middle of the second auxiliary component 13112; when the width of the second auxiliary component 13112 is slightly smaller than the distance between the first airway hole 1511 and the inner wall of the first auxiliary component 1311, the second airway hole 1512 can be set on the outer surface of the second auxiliary component 13112, that is, the second airway hole 1512 is a slot-shaped hole. The position distribution of the second airway hole 1512 is similar to that of the first airway hole 1511, and will not be repeated here.

[0084] Furthermore, the contour shapes of the first airway hole 1511 and the second airway hole 1512 match the cross-sectional shape of the airway component, so that the airway component can be more firmly installed in the corresponding first airway hole 1511 and the second airway hole 1512, ensuring the airway quality and the molding quality of the high-voltage insulation layer 1330.

[0085] In the present embodiment, a pad block 1410 is correspondingly arranged in each winding groove 1314 on the fourteen winding plates 1313, and correspondingly, thirteen first airway holes 1511 are circumferentially spaced apart in the middle of the first auxiliary component 13111, and thirteen second airway holes 1512 are correspondingly arranged on the outer plate surface of the second auxiliary component 13112, so that each group of first airway holes 1511 and second airway holes 1512 are respectively spaced apart from the fourteen winding plates 1313, that is, among the fourteen winding plates 1313, the first airway holes 1511 and the second airway holes 1512 are not arranged between two adjacent winding plates 1313, so as to leave space for the wire to be guided and passed through two adjacent circles of winding grooves. When the winding plate 1313 is fixedly connected to the auxiliary part 1311, an installation space for the airway part can be formed between any two adjacent winding plates 1313 on both sides of the first airway hole 1511 and the second airway hole 1512, so that thirteen airways can be formed after the high-voltage winding 130 is formed, so that the high-voltage winding 130 can achieve uniform and rapid heat dissipation, thereby improving the operational reliability of the product. In other embodiments, two, three or more pads can be correspondingly arranged in each winding groove on each winding plate, and two, three or more circles of airway holes can be correspondingly arranged on each auxiliary part, so that more layers of airways can be formed, which can be adjusted according to the airway design of the high-voltage winding, and no specific limitation is made here.

[0086] The winding body 1310 further includes a plurality of support members 1610, which are fixed at intervals along the circumference of the winding body 1310 on the inner circumference of the auxiliary member 1311, and the length direction of the support members 1610 is arranged along the axial direction of the winding body 1310. Specifically, the inner surface of each auxiliary member 1311 is also provided with a plurality of third clamping grooves 1611, and the support members 1610 are rectangular rods, and the length thereof along the axial direction of the winding body 1310 is the same as that of the winding plate 1313. The support members 1610 are clamped on the inner circumference of the auxiliary member 1311 through the third clamping grooves 1611, so that when the wire is wound, the support members 1610 can abut against the winding tooling and firmly support the inner side of each coil section, so as to avoid the coil from sinking due to the winding tension, and ensure the winding quality of the high-voltage coil 1320. Furthermore, when a plurality of support portions 1315 are provided on the other side of the winding plate 1313, a plurality of support portions 1315 may also be provided on the side of the support member 1610 that is used to abut against the winding tooling to further ensure the supporting effect. The specific arrangement of the support portion 1315 is as described above and will not be repeated. In other embodiments, a plurality of fourth slots may be provided on the support member, and each auxiliary member may be clamped on the outer periphery of the support member through the fourth slots, or a plurality of third slots may be provided on the first auxiliary member, and a fourth slot may be provided in the middle of the support member, so that each support member can be fixed on the inner periphery of the auxiliary member. No specific limitation is made here.

[0087] Furthermore, the plurality of support members 1610 are symmetrically distributed along the central axis section of the winding body 1310, so that the support of each support member 1610 to the coil can be more uniform and stable, avoiding problems such as inconsistent thickness of the high-voltage insulation layer 1330 due to eccentric support, which affects the quality of the high-voltage winding 130. Among them, the plurality of support members 1610 may include two, four, six or more support members 1610, and the plurality of support members 1610 may be distributed on the inner periphery of both sides of the auxiliary member 1311, or circumferentially uniformly distributed on the inner periphery of the auxiliary member 1311, as long as the uniform support of the wire can be achieved, and no specific limitation is made here.

[0088] In this embodiment, the auxiliary component 1311 is also made of glass fiber impregnated with epoxy resin. Multiple layers of glass fiber cloth impregnated with epoxy resin are stacked to a certain thickness and molded and cured to form a fiberglass component. The winding plate 1313 and the auxiliary component 1311 are separately formed and fixed by clamping and bonding.

[0089] 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.

[0090] Combination Figure 5 , Figure 6 , Fig.11 , Fig.13 and Fig.14 As shown, taking the A-phase transformer 100 as an example, the wire is circumferentially wound on the outer peripheral 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 winding body 1310, and the wire forms two external connections at the head and tail ends after winding, namely, a first external connection D and a 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.

[0091] In one application scenario, the conductor is wound in a pancake-like manner, and only one pancake coil is provided in each winding slot 1314. At this time, each section of the coil has only one pancake coil, and the conductor includes a first conductor and a second conductor, and the first conductor and the second conductor are both continuous conductors, and the first conductor and the second conductor are both coated with an insulating layer, and 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, when the high-voltage winding 130 is placed vertically, the upper end of the winding portion 1312 is defined as the first end, and the lower end of the winding portion 1312 is defined as the second end. The first conductor is wound from the first end of the winding portion 1312 along the axial direction of the winding body 1310 to the middle of the winding portion 1312, and three taps are led out. The first conductor is wound from the first end of the winding portion 1312 to the second end of the winding portion 1312, and the first conductor is wound around the designed number of turns in the first winding groove 1314 corresponding to a circle on all the winding plates 1313 to form an inner coil of the first section of the coil 1321, and then a pad 1410 is installed in the winding groove 1314 of the circle, that is, each pad 1410 is respectively clamped on the corresponding second comb tooth limiting step 1412 on all the winding plates 1313 through the installation groove 1413, and the first conductor is introduced into the cross-wire groove 1414 from the wire inlet 1415 on one of the pads 1410 provided with the cross-wire groove 1414 and led out from the wire outlet 1416, and then the coil with the designed number of turns is continued to be wound in the winding groove 1314 of the circle to form an outer coil of the first section of the coil 1321. The inner turn wire end of the first coil 1321 (i.e., the head end of the first wire) is the first external connection D. The outer turn wire end of the first coil 1321 extends to the corresponding second winding groove 1314 on all winding plates 1313 to continue winding to form the inner layer coil of the second coil 1322. Then, the pad 1410 is installed and the outer layer coil of the second coil 1322 is wound, and so on, until the first wire is wound to the middle of the winding body 1310 to form several coils, and three taps are respectively led out through the outer turn wire ends of three of the coils, as shown in FIG. Fig.13 The tap 6, tap 4 and tap 2 are shown, and the winding of the first conductor is now complete.

[0092] The second conductor is wound from the middle of the winding part 1312 along the axial direction of the winding body 1310 to the second end of the winding part 1312, and three more taps are led out. Specifically, the second conductor starts to be wound in the next winding groove 1314 adjacent to the tap 2 to form the third segment coil 1323, and the second conductor continues to be wound to the second end of the winding part 1312 in the same winding manner as the first conductor to form several segments of coils, and in the winding process, three more taps are led out from the three segments of coils starting from the third segment coil 1323, namely, tap 3, tap 5 and tap 7, 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 wire 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 wound up.

[0093] When the wire is wound, it is wound in a circle of winding grooves 1314 corresponding to all winding plates 1313, so that each coil formed by the winding of the wire is perpendicular to the axis of the winding body 1310, the winding is convenient and the wire is arranged neatly, the winding plate 1313 is evenly stressed, and the mechanical strength is good.

[0094] In this way, a pancake-shaped high-voltage coil 1320 is formed, which 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. In addition, in the axial direction of the winding body 1310, 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. Of course, the layer-shaped coil can also be used in other embodiments.

[0095] 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, 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.

[0096] 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.

[0097] like Fig.11 and Fig.12As 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 an injection mold, and the high-temperature vulcanized silicone rubber is injected as a whole on the periphery of the body to be injected by adding silicone rubber raw materials 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.

[0098] 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.

[0099] Before the high temperature vulcanized silicone rubber is injected as a whole, it is necessary to install airway parts, and install several airway parts on each auxiliary part 1311 through the corresponding airway holes. And a tooling connector can be set on the injection mold, and a protective cavity corresponding to the six taps is provided on the tooling connector. The taps are fixed in the protective cavity accordingly, and the remaining space in the protective cavity is filled with bolts and other connectors, so as to avoid the six taps being covered by silicone rubber during the injection process and unable to be used for wiring.

[0100] 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, so that the high-voltage winding 130 is a hollow column as a whole, and the airway parts are pulled out to form a number of axial airways in the high-voltage insulation layer 1330.

[0101] The high-voltage winding 130 of the present application is prepared with a high-voltage insulating layer 1330 of high-temperature vulcanized silicone rubber outside the high-voltage coil 1320. Compared with the epoxy resin high-voltage insulating layer in the prior art, it 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 10; 2) The copper coil is easy to peel off from the silicone rubber, and the material recovery rate is greater than 99%, which is more environmentally friendly; 3) The silicone rubber elastomer can weaken the local discharge inducement caused by mechanical vibration, and has an inhibitory effect on equipment discharge. The product of silicone rubber under the discharge action is non-conductive silicon dioxide, which can effectively inhibit the continued degradation of insulation; 4) It can reduce the operating loss of the transformer and save more energy; 5) It has good resistance to harsh environments and can be installed indoors and outdoors. At the same time, the present application uses overall high-temperature vulcanization injection molding. Compared with the existing room temperature vulcanization, this process method makes the high-voltage insulation layer 1330 more stable and has higher mechanical properties, and has better bonding performance with the high-voltage coil 1320 and the winding body 1310, which can effectively extend the service life of the high-voltage insulation layer 1330. In addition, compared with liquid silicone rubber, the high-temperature vulcanized silicone rubber filler of the present application is evenly dispersed, and the dry-type transformer 10 will not generate partial discharge due to filler agglomeration, so that the overall performance of the dry-type transformer 10 is better.

[0102] In this embodiment, if Fig.14 As shown, it is a partial cross-sectional view of a high-voltage winding 130 coated with a high-voltage insulating layer 1330 cut along its axial direction. The wire adopts the aforementioned winding method and is wound in a comb-tooth-shaped winding plate 1313 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. In other embodiments, the wire can also be formed into a high-voltage coil by other winding methods, as long as the structure of the winding portion is adjusted accordingly, and no specific limitation is made here.

[0103] 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, used for winding a conductor to form a high-voltage coil, characterized in that: The winding body comprises: A plurality of winding plates are distributed along the circumference of the winding body, the length directions of the plurality of winding plates are arranged along the axial direction of the winding body, a plurality of winding grooves are arranged on the winding plates so that the winding plates form a plurality of comb teeth, a pad is arranged in each of the winding grooves on at least two adjacent winding plates, the length direction of the pad is arranged along the circumference of the winding body, and the pad is located in the middle of the comb teeth; A plurality of auxiliary parts are annular and arranged at intervals along the axial direction of the winding body, and a plurality of the winding plates are fixedly connected to the auxiliary parts.

2. The winding body of the high voltage winding according to claim 1, characterized in that: The winding plate is clamped on the inner periphery of the auxiliary parts, and the auxiliary parts include two first auxiliary parts and at least one second auxiliary part. The first auxiliary parts are clamped on the ends of the winding plate, and the second auxiliary parts are clamped on the middle of the winding plate.

3. The winding body of the high voltage winding according to claim 2, characterized in that: A plurality of first grooves are arranged on one side plate surface of the two first auxiliary members, and the plurality of first grooves are arranged corresponding to the plurality of winding plates for accommodating the comb teeth at the ends of the winding plates.

4. The winding body of the high voltage winding according to claim 3, characterized in that: A limit block is provided between two adjacent comb teeth at the end of the winding plate, and a plurality of second grooves are provided on the other side plate surface of the first auxiliary component. The plurality of second grooves are provided corresponding to the plurality of winding plates for being connected with the limit block.

5. The winding body of the high voltage winding according to claim 2, characterized in that: A plurality of flow grooves are arranged on the inner side of the first auxiliary component.

6. The winding body of the high voltage winding according to claim 2, characterized in that: A plurality of first airway holes are provided in the middle of the first auxiliary component, and the plurality of first airway holes are distributed at intervals along the circumference of the winding body.

7. The winding body of the high voltage winding according to claim 6, characterized in that: A plurality of second airway holes are provided on the middle portion or the outer side plate surface of the second auxiliary component, and the plurality of second airway holes correspond one-to-one to the plurality of first airway holes.

8. The winding body of the high voltage winding according to claim 1, characterized in that: The cushion block is an arc-shaped block, and the curvature of the cushion block matches the circumference of the winding body.

9. The winding body of the high voltage winding according to claim 1, characterized in that: L-shaped grooves are arranged on both sides of the comb teeth, and the two L-shaped grooves are arranged opposite to each other and symmetrically distributed along the length direction of the winding plate, so that two limiting steps are formed on both sides of the middle part of the comb teeth respectively.

10. The winding body of the high voltage winding according to claim 9, characterized in that: A mounting groove is provided in the middle of one side of the cushion block, and the mounting groove is arranged along the radial direction of the winding body. The cushion block is clamped on the limiting step of the comb teeth through the mounting groove.

11. The winding body of the high voltage winding according to claim 10, characterized in that: A line crossing groove is provided on the other side of the cushion block where the mounting groove is not provided. The line crossing groove is tilted so that a line inlet is formed on the bottom side of one end of the cushion block and a line outlet is formed on the top side of the other end of the cushion block.

12. The winding body of the high voltage winding according to claim 11, characterized in that: The depth of the cross-line groove matches the width of the wire.

13. The winding body of the high voltage winding according to claim 1, characterized in that: A plurality of supporting parts are arranged on the other side of the winding plate where the comb teeth are not arranged. The plurality of supporting parts are arranged along the radial direction of the winding body and are distributed at intervals along the axial direction of the winding body.

14. The winding body of the high voltage winding according to claim 1, characterized in that: The winding body further comprises a plurality of support members which are fixed at intervals on the inner periphery of the auxiliary member along the circumferential direction of the winding body, and the length direction of the support members is arranged along the axial direction of the winding body.

15. 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 14, 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 a plurality of axial air passages are arranged in the high-voltage insulation layer.

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