High-voltage winding

Abstract

The high-voltage winding comprises a winding body, a high-voltage coil, a high-voltage insulating layer and a wire outlet terminal, the high-voltage insulating layer is made of high-temperature vulcanized silicone rubber, the whole wire outlet terminal is of a prism structure, the wire outlet terminal comprises an internal connecting part and an external connecting part which are connected, and the internal connecting part is used for being connected with a wire in the high-voltage winding; the external connection part is used for being connected with a connecting piece outside the high-voltage winding, a plurality of first grooves are formed in the periphery of the internal connection part and are arranged in the axial direction of the wire outlet terminal, a plurality of second grooves are formed in the periphery of the external connection part and are arranged in the circumferential direction of the wire outlet terminal, and the winding body and the high-voltage coil are wrapped with the high-temperature vulcanized silicone rubber. And filling the first trench and the second trench. The outgoing line terminal of the high-voltage winding has good torsion resistance and pulling resistance at the same time, the outgoing line terminal can be prevented from being separated from a high-voltage insulating layer when being connected with a connecting piece outside the high-voltage winding, the reliability of wire connection is improved, and the product quality is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of dry-type transformers, and particularly to a high-voltage winding. Background Art

[0002] In traditional dry-type transformer high-voltage windings, epoxy resin is used as the insulation filling material. After the epoxy resin cures, it has a relatively high hardness. Therefore, for the outgoing terminals of this type of high-voltage winding, there is no need to consider the anti-pulling characteristics, and only a certain anti-torsion characteristic needs to be considered. The anti-torsion design is mostly to set a knurled structure on the surface of the outgoing terminal.

[0003] Currently, in new dry-type transformer high-voltage windings, high-temperature vulcanized silicone rubber is used as the insulation filling material. After the silicone rubber vulcanizes, it has a certain hardness, but its hardness is lower than that of the cured epoxy resin. Therefore, the outgoing terminals used in this type of high-voltage winding need to consider not only the anti-torsion characteristic but also the anti-pulling characteristic. If the outgoing terminals with a knurled structure are directly used, their anti-pulling characteristics are seriously insufficient, and the anti-torsion characteristics also cannot meet the requirements of installation and long-term use, affecting the reliability of wire connection and thus the quality of the high-voltage winding. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the main purpose of this application is to provide a high-voltage winding whose outgoing terminals have good anti-torsion and anti-pulling characteristics at the same time, can prevent the outgoing terminals from disengaging from the high-voltage insulation layer when connecting to the external connectors of the high-voltage winding, improve the reliability of wire connection, and ensure the product quality.

[0005] To solve the above technical problems, the technical solution adopted in this application is: a high-voltage winding, including a winding body, a high-voltage coil, a high-voltage insulation layer, and an outgoing terminal. The high-voltage insulation layer is high-temperature vulcanized silicone rubber. The outgoing terminal is integrally in a prismatic structure and includes a connected inner connection part and an outer connection part. The inner connection part is used to connect the wire inside the high-voltage winding, and the outer connection part is used to connect the external connectors of the high-voltage winding. A plurality of first grooves are provided on the outer periphery of the inner connection part, and the first grooves are arranged along the axial direction of the outgoing terminal. A plurality of second grooves are provided on the outer periphery of the outer connection part, and the second grooves are arranged along the circumferential direction of the outgoing terminal. The high-temperature vulcanized silicone rubber wraps the winding body and the high-voltage coil and fills the first grooves and the second grooves.

[0006] Among them, one end of the inner connection part away from the outer connection part is provided with a wiring hole for connecting the wire, and the shape and size of the wiring hole match the shape and size of the wire cross-section.

[0007] Among them, one end of the outer connection part away from the inner connection part is provided with a connection hole, and the connection hole is arranged along the axial direction of the outgoing terminal for connecting the connector.

[0008] Among them, the second groove is an annular groove, and a plurality of second grooves are arranged at intervals along the axial direction of the outgoing terminal.

[0009] Among them, the second groove is an arc groove, and a plurality of arc grooves are staggered on the outer periphery of the external connection part.

[0010] Among them, the winding body includes a plurality of winding plates and a plurality of auxiliary parts. The length directions of the plurality of winding plates are arranged along the axial direction of the winding body and are evenly distributed along the circumferential direction of the winding body. The plurality of auxiliary parts are annular and are arranged at intervals along the axial direction of the winding body. The auxiliary parts are clamped and connected with the winding plates.

[0011] Among them, a plurality of winding grooves are arranged on the winding plate so that one side of the winding plate forms a plurality of comb teeth for winding the high-voltage coil.

[0012] Among them, the winding body further includes a plurality of winding parts. A plurality of movable winding parts are arranged on the winding plate along the winding plate. A winding groove is formed between two adjacent winding parts on the winding plate for winding the high-voltage coil.

[0013] Among them, a moving groove is arranged at the bottom of the winding part connected with the winding plate. The winding part and the winding plate are slidably connected through the moving groove so that the winding part can move along the winding plate.

[0014] Among them, the winding part is a rectangular plate part and the moving groove is a T-shaped groove.

[0015] The beneficial effects of the present application are as follows: The outgoing terminal of the high-voltage winding of the present application has a prism structure, which is simple to process, and its polygonal end face itself can provide certain anti-torsion characteristics. By opening the axial first groove to fill the elastomer material, the outgoing terminal can obtain good anti-torsion characteristics in the circumferential direction; by opening the circumferential second groove to fill the elastomer material, the outgoing terminal can obtain good anti-pulling characteristics in the axial direction, thereby avoiding the outgoing terminal from being disengaged from the high-voltage insulating layer when connecting the connecting piece outside the high-voltage winding, improving the reliability of wire connection, and thus ensuring the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings. Among them:

[0017] Figure 1 is the front view of the dry-type transformer 10 according to an embodiment of the present application;

[0018] Figure 2 is the top view of the dry-type transformer 10 according to an embodiment of the present application;

[0019] Figure 3 is the front view of the assembled iron core 110 according to an embodiment of the present application;

[0020] Figure 4 is Figure 2 An enlarged view of the position G in the figure;

[0021] Figure 5 Is a perspective view of the winding body 1310 according to an embodiment of the present application;

[0022] Figure 6 Is a perspective view of the high-voltage coil 1320 wound around the winding body 1310 according to an embodiment of the present application;

[0023] Figure 7 Is a perspective view of the winding member 2314 according to an embodiment of the present application;

[0024] Figure 8 Is a perspective view of the winding body 1310 according to another embodiment of the present application;

[0025] Figure 9 Is a perspective view of the high-voltage winding 130 according to an embodiment of the present application;

[0026] Figure 10 Is a partial cross-sectional view of the high-voltage winding 130 according to an embodiment of the present application;

[0027] Figure 11 Is a structural diagram of the outgoing terminal 150 in an embodiment of the present application;

[0028] Figure 12 Is a structural diagram of the outgoing terminal 150 from another angle in an embodiment of the present application;

[0029] Figure 13 Is a side view of the outgoing terminal 150 in an embodiment of the present application;

[0030] Figure 14 Is a front view of the outgoing terminal 150 in an embodiment of the present application;

[0031] Figure 15 Is a rear view of the outgoing terminal 150 in an embodiment of the present application. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0033] Such as Figures 1 to 3As shown, the dry-type transformer 10 is a three-phase transformer, and the three phases are the A phase, the B phase, and the C phase, that is, the dry-type transformer 10 includes three single-phase transformers. According to the different structures of the iron core 110, the three single-phase transformers can be arranged to form a linear structure or a triangular structure, and the three transformers are in a symmetrical structure. In addition, the dry-type transformer 10 can also be an isolation transformer, a frequency conversion transformer, a test transformer, etc.

[0034] In an embodiment, the three single-phase transformers are arranged to form a linear structure. The dry-type transformer 10 includes an iron core 110, a low-voltage winding 120, and a high-voltage winding 130. 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 low-voltage winding 120 is provided in three, and is respectively sleeved on the outer peripheries of the three columnar iron core bodies 111. The high-voltage winding 130 is provided in three, and is 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 one by one, so as to form the three-phase dry-type transformer 10. And the columnar iron core bodies 111, the low-voltage windings 120, and the high-voltage windings 130 of each phase are coaxially arranged, that is, their axial directions are the same. 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 no limitation is made 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, so as to form the iron core 110.

[0035] An iron core clamp 140 is arranged outside the iron core 110, and the iron core clamp 140 is used to clamp the iron core 110. The iron core clamp 140 can be a channel steel part or a hollow pipe part, and no limitation is made here. Four iron core clamps 140 are provided, and two of the iron core clamps 140 are symmetrically located on both sides of the upper end of the iron core 110; the other two iron core clamps 140 are symmetrically located on both sides of the lower end of the iron core 110.

[0036] Combined Figure 2 and Figure 4 As shown, the low-voltage winding 120 includes copper foils 121, a low-voltage insulating layer 122, and support bars 123, and the copper foils 121 and the low-voltage insulating layer 122 are alternately arranged. The copper foils 121 are formed by winding a whole copper foil paper, and the low-voltage insulating layer 122 is overlapped with the copper foils 121 and then wound together, so as to realize the alternate arrangement of the copper foils 121 and the low-voltage insulating layer 122.

[0037] 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 the low-voltage insulating layer 122, and the support bar 123 is located in the heat dissipation air duct for supporting and isolating adjacent copper foils 121 and the low-voltage insulating layer 122.

[0038] As Figures 5 - 9 shown, the high-voltage winding 130 includes a winding body 1310, a high-voltage coil 1320, and a high-voltage insulating layer 1330. The wire is wound around the winding body 1310 to form the high-voltage coil 1320. 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.

[0039] In one embodiment, referring to Figure 5 and Figure 6 , the winding body 1310 adopts a fixed winding structure. Specifically, the winding body 1310 includes a plurality of winding plates 1313 and a plurality of auxiliary members 1311. The length directions of the plurality of winding plates 1313 are arranged along the axial direction of the winding body 1310 and are evenly distributed along the circumferential direction of the winding body 1310. The plurality of auxiliary members 1311 are annular and are spaced apart along the axial direction of the winding body 1310. The auxiliary members 1311 are clamped and connected to the winding plates 1313. The winding plate 1313 is a fixed comb tooth plate, that is, a plurality of winding grooves 1314 are provided on the winding plate 1313 so that a plurality of comb teeth are formed on one side of the winding plate 1313 for winding the wire. At least one coil segment is arranged between two adjacent comb teeth on the winding plate 1313, so that each winding groove 1314 is wound with a wire, the high-voltage coil 1320 is reasonably distributed, and each coil segment is spaced apart, with balanced stress and good mechanical strength. Compared with the traditional structure, the winding body 1310 omits the structure of the rigid insulating inner liner, so that the heat conduction effect is better, the interface between the high-voltage insulating layer and the rigid insulating inner liner is eliminated, thereby suppressing the surface discharge of the rigid insulating inner liner, and saving materials and reducing costs.

[0040] Furthermore, a plurality of support portions 13131 are provided on the other side of the winding plate 1313 without comb teeth for abutting against the winding tooling, so that the winding plate 1313 will not be softened and deformed due to high temperature during the injection molding of the high-voltage insulating layer 1330, resulting in lack of support for the high-voltage coil 1320, effectively avoiding the inward deformation of the high-voltage coil 1320 and ensuring the quality of the high-voltage winding 130.

[0041] In another embodiment, referring to Figure 7 and Figure 8, the winding body 1310 adopts a movable winding structure. The winding body 1310 includes a plurality of winding plates 1313, a plurality of winding members 2314 and a plurality of auxiliary members 1311. The structures of the plurality of auxiliary members 1311 and the connection modes with the winding plates are as described above and will not be elaborated here. A plurality of winding members 2314 movable along the winding plate 1313 are provided on the winding plate 1313. A winding groove 1314 is formed between two adjacent winding members 2314 on the winding plate 1313 for winding a wire. After the winding plate 1313 and the winding members 2314 are matched, the whole is in a comb shape. At least one coil is arranged between two adjacent winding members 2314 on the winding plate 1313, so that a wire is wound in each winding groove 1314, the high-voltage coils 1320 are reasonably distributed and arranged, and the coils are arranged at intervals.

[0042] Specifically, a moving groove 2315 is arranged at the bottom of the winding member 2314 connected to the winding plate 1313. The winding member 2314 and the winding plate 1313 are slidably connected through the moving groove 2315, so that the winding member 2314 can move along the winding plate 1313, which is convenient for flexibly adjusting the position of the winding member 2314 according to the shape and structure of the high-voltage coil 1320, has a wider application range and further reduces costs. For example, the winding plate 1313 is a long strip with an I-shaped cross section, the winding member 2314 is a rectangular plate member, and the moving groove 2315 of the winding member 2314 is correspondingly arranged as a T-shaped groove, that is, the winding plate 1313 is arranged in the moving groove 2315 so that the winding member 2314 can move along the winding plate 1313.

[0043] The winding body 1310 is made of a fiber-reinforced composite material and 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 easily damaged, and can avoid the wire being washed away and displaced by the injection impact force generated when the high-temperature vulcanized silicone rubber is injected outside the winding body 1310; moreover, the fiber-reinforced composite material has good heat resistance, which can avoid the winding body 1310 being deformed due to excessive heat generated by the high-voltage coil 1320 during the operation of the dry-type transformer 10. Combined Figure 5 , Figure 6 and Figure 9As shown, the wire is wound circumferentially around the outer peripheral surface of the winding body 1310 to form a high-voltage coil 1320. Specifically, the wire is wound from one end of the winding body 1310 to the other end, and is wound through the winding groove 1314 at one end of the winding body 1310 into the winding groove 1314 at the other end of the winding body 1310, so that the high-voltage coils 1320 are spaced apart axially on the winding body 1310. And after the wire is wound, the head and tail ends form two external connections, 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 wires. For example, in a three-phase transformer, it is used for the mutual connection between each phase of the transformer. The wire leads out six taps in the middle 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 changer. For the convenience of description, tap 2, tap 4 and tap 6 are defined as the first tap changer, and tap 3, tap 5 and tap 7 are defined as the second tap changer.

[0044] When the wire is wound, it is wound in the corresponding one-turn winding grooves 1314 on all the winding plates 1313, so that each coil formed by the wire winding is perpendicular to the axial direction of the winding body 1310. The winding is convenient, the wire arrangement is neat, the winding plates 1313 are evenly stressed, and the mechanical strength is good.

[0045] Combined with Figure 10 As shown, it is a partial cross-sectional view of the high-voltage winding 130 covered with a high-voltage insulating layer 1330 cut along its axial direction. The wire is wound in the comb-shaped winding plates 1313 by the aforementioned winding method to form a pancake-type high-voltage coil 1320. Along the axial direction of the high-voltage winding 130, the pancake-type high-voltage coils 1320 and the teeth of the winding plates 1313 are arranged at intervals, that is, there is a pancake coil between two adjacent teeth. This coil structure has good mechanical strength, strong bearing capacity for the electrodynamic force generated by the short-circuit current. Compared with the layer-type coil, it has more pancakes and better heat dissipation capacity.

[0046] Combined with Figure 9 As shown, tap 6, tap 4 and tap 2 are distributed in sequence to form the first tap changer, tap 3, tap 5 and tap 7 are distributed in sequence to form the second tap changer, and the first tap changer and the second tap changer are arranged in parallel. The six taps form a tap 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.

[0047] Among them, the wire is wound around the winding body 1310 to form a high-voltage coil 1320. Thus, the high-voltage coil 1320 is in a ring shape. Defining the ring width of the high-voltage coil 1320 as the width of the high-voltage coil 1320, the width of the high-voltage coil 1320 is the same on each of its radial cross-sections, making the overall force on the high-voltage coil 1320 balanced. Of course, considering the actual operation situation, the widths of the coils on their radial cross-sections may not be exactly the same, as long as they are approximately the same.

[0048] In this embodiment, the tap changer includes six taps. At this time, the dry-type transformer 10 has five voltage adjustment gears. In other embodiments, the tap changer may also include four taps, that is, the first tap changer and the second tap changer each include two taps. At this time, the dry-type transformer includes three voltage adjustment gears, as long as it meets the actual use requirements of the dry-type transformer, and no limitation is made here.

[0049] Combined with Figures 11 to 15 , the high-voltage winding 130 further includes an outgoing line terminal 150, which is connected to two external connections led out from both ends of the high-voltage coil 1320 and six taps led out from the middle, and is used for the outgoing line of the high-voltage winding 130. The high-voltage insulating layer 1330 of the high-voltage winding 130 is an elastomer. The outgoing line terminal 150 is in a prismatic structure as a whole. The outgoing line terminal 150 includes a connected inner connection part 1510 and an external connection part 1520. The inner connection part 1510 is used to connect the wires inside the high-voltage winding 130, and the external connection part 1520 is used to connect the connectors outside the high-voltage winding 130 (not shown in the figure). A plurality of first grooves 1511 are formed on the outer periphery of the inner connection part 1510. The first grooves 1511 are arranged along the axial direction of the outgoing line terminal 150. One end of the inner connection part 1510 is also provided with a wiring hole 1512; a plurality of second grooves 1521 are formed on the outer periphery of the external connection part 1520. The second grooves 1521 are arranged along the circumferential direction of the outgoing line terminal 150. The outgoing line terminal 150 of the present application is in a prismatic structure, which is convenient for obtaining materials, and certain anti-torsion characteristics can be obtained by using its prismatic outer peripheral surface; and a first groove 1511 is formed on the outer periphery of the outgoing line terminal 150. When the insulating filling material is fully filled into the first groove 1511, the anti-torsion characteristics of the outgoing line terminal 150 in the circumferential direction can be further improved, ensuring the quality of the high-voltage winding 130.

[0050] In this embodiment, the outgoing line terminal 150 has a hexagonal prism structure, preferably a regular hexagonal prism structure. A hexagonal profile can be directly selected, which is convenient to obtain. Moreover, a regular hexagon is an axisymmetric and centrosymmetric figure, making the processing of the outgoing line terminal 150 simple and the manufacturing convenient. In addition, a regular hexagon is relatively close to a circle and has strong anti-torsion characteristics, further ensuring the quality of the high-voltage winding 130. Furthermore, the structure of the outgoing line terminal 150 in the shape of a regular hexagonal prism is relatively regular, facilitating the reasonable arrangement of the positions of a plurality of first grooves 1511 and wiring holes 1512 on the outer periphery of the inscribed part 1510, and also facilitating the processing of the first grooves 1511 and the wiring holes 1512. In other embodiments, the outgoing line terminal can also be a quadrangular prism, a pentagonal prism or an octagonal prism, as long as the anti-pulling and anti-torsion characteristics of the outgoing line terminal can be satisfied, and there is no limitation here.

[0051] A wiring hole 1512 is provided at one end of the inscribed part 1510 away from the circumscribed part 1520. The wiring hole 1512 is used to connect the wire inside the high-voltage winding 130. The shape and size of the wiring hole 1512 match the shape and size of the cross-section of the wire. The wire inside the high-voltage winding 130 can be connected to the wiring hole 1512 by a welding process, which is simple in processing, high in connection strength, long in service life and low in maintenance cost. Combining Figure 14 , in this embodiment, the cross-sectional shape of the wire is rectangular, and the wiring hole 1512 is an oval hole. The middle part of the oval hole is a rectangular hole, and both ends are semi-circular holes. The rectangular hole and the semi-circular holes are smoothly transitioned. The oval hole roughly matches the rectangular cross-section, but is more convenient to process than the rectangular hole. The wiring hole 1512 is provided at the center of the end face of the inscribed part 1510, that is, the long axis of the oval hole is located on the line connecting any two opposite vertices of the regular hexagon, and is also parallel to two opposite sides of the regular hexagon. The wiring hole 1512 extends axially inward along the outgoing line terminal 150 but does not penetrate the inscribed part 1510. The depth of the wiring hole 1512 along the axis of the outgoing line terminal 150 is defined as the depth of the wiring hole 1512. The depth of the wiring hole 1512 can be adjusted according to specific application requirements such as wire welding, and there is no limitation here. The long axis of the oval hole is the central axis where its two ends with a longer distance are located, and the short axis is the central axis where its two ends with a shorter distance are located. The distance between the two ends on the long axis of the wiring hole 1512 is defined as the length of the wiring hole 1512, that is, the length of the oval hole is the sum of the diameter of its semi-circular hole and the length of the rectangular hole. The length of the wiring hole 1512 is less than the diagonal distance of the end face of the inscribed part 1510 to ensure the structural reliability of the outgoing line terminal 150. In other embodiments, the wiring hole can also be a circular hole or a rectangular hole, etc., as long as it can connect the wire inside the high-voltage winding, and there is no limitation here.

[0052] In this embodiment, two first grooves 1511 are provided on the outer periphery of the inner connection portion 1510. The first grooves 1511 are rectangular grooves, which are opened along the axial direction of the outgoing line terminal 150. One end of the first groove 1511 is flush with the end face of the inner connection portion 1510 away from the outer connection portion 1520, and the other end of the first groove 1511 is located inside the end of the inner connection portion 1510 close to the outer connection portion 1520, that is, the first groove 1511 does not penetrate the inner connection portion 1510. The two first grooves 1511 are provided on two opposite side faces of the hexagonal prism. While ensuring the structural strength of the outgoing line terminal 150, the insulating filling material is evenly distributed on the outer periphery of the outgoing line terminal 150, so that the torsional resistance characteristics of the outgoing line terminal 150 are better, and further ensuring the quality of the high-voltage winding 130.

[0053] In this embodiment, since the wiring hole 1512 is an oval hole, the space on both sides of the straight edge of the oval hole on the inner connection portion 1510 is larger than the space on both sides of the arc edge of the oval hole. Therefore, the two first grooves 1511 are symmetrically arranged on both sides of the straight edge of the wiring hole 1512, which can effectively improve the space utilization rate on the inner connection portion 1510, and the distribution of the first groove 1511 and the wiring hole 1512 is more reasonable, so that the performance of the outgoing line terminal 150 is more reliable. The depth of the first groove 1511 along the axial direction of the outgoing line terminal 150 is defined as the depth of the first groove 1511, and the depth of the first groove 1511 can be adjusted according to the processing requirements of the insulating filling material; the length of the first groove 1511 along the radial direction of the outgoing line terminal 150 is defined as the length of the first groove 1511, the distance between the two ends on the short axis of the wiring hole 1512 is defined as the width of the wiring hole 1512, and the sum of the lengths of the two first grooves 1511 and the width of the wiring hole 1512 is less than the opposite side distance of the end face of the inner connection portion 1510 to ensure the structural reliability of the outgoing line terminal 150; the width of the first groove 1511 along the circumferential direction of the outgoing line terminal 150 is defined as the width of the first groove 1511, and the width of the first groove 1511 is less than the side length of the end face of the inner connection portion 1510 to ensure the structural strength of the outgoing line terminal 150. In other embodiments, the first groove can be a curved shape or any other suitable geometric shape; the first groove can be provided with one, three or more, and is provided on one or more adjacent side faces of the outer periphery of the inner connection portion, as long as the torsional resistance requirements of the outgoing line terminal are met, and there is no limitation here.

[0054] The outer connection portion 1520 is connected to a connecting member (not shown in the figure). The connecting member can be an external link for connecting each high-voltage winding 130; the connecting member can also be a lead wire for connecting an external power supply. At least two second grooves 1521 are provided on the outer connection portion 1520. The second grooves 1521 are spaced along the axial direction of the outer connection portion 1520 and are evenly distributed on the outer peripheral surface of the outer connection portion 1520.

[0055] In one embodiment, the second groove 1521 is an annular groove, and a plurality of second grooves 1521 are arranged at intervals along the axial direction of the lead-out terminal 150. In this embodiment, there are four second grooves 1521 provided on the external connection portion 1520, and the four second grooves 1521 are evenly distributed on the outer periphery of the external connection portion 1520. The depth of the second groove 1521 in the radial direction of the lead-out terminal 150 is defined as the depth of the second groove 1521, and the depth of the second groove 1521 can be adjusted according to the processing requirements of the insulating filling material. The width of the second groove 1521 in the axial direction of the lead-out terminal 150 is defined as the width of the second groove 1521. The width of the second groove 1521 is equivalent to the distance between two adjacent second grooves 1521, making the surface of the external connection portion 1520 in a gully shape, so that the insulating filling material can be fully filled into the second groove 1521, and the lead-out terminal 150 obtains good anti-pulling characteristics in the axial direction, avoiding the insufficient anti-pulling characteristics of the lead-out terminal 150 from affecting the reliability of the wire connection. In other embodiments, the number of the second grooves can be three, five or more, as long as the anti-pulling requirements of the lead-out terminal can be met, and no limitation is made herein.

[0056] In another embodiment, the second groove 1521 is an arc-shaped groove (not shown in the figure), and a plurality of second grooves 1521 are arranged in a staggered manner on the outer periphery of the external connection portion 1520. For example, the central angle of each arc-shaped groove is greater than or equal to 180°, and the notches of any two adjacent arc-shaped grooves are arranged opposite to each other, so that a plurality of arc-shaped grooves are arranged at intervals in a staggered manner; for another example, the arc-shaped groove is a combined groove, each arc-shaped groove includes a plurality of sub-arc-shaped grooves, and the plurality of sub-arc-shaped grooves are arranged at intervals along the circumferential direction of the lead-out terminal 150, and the sub-arc-shaped grooves of any two adjacent arc-shaped grooves are arranged in a staggered manner, so that a plurality of arc-shaped grooves are arranged at intervals in a staggered manner, wherein the central angles of the plurality of sub-arc-shaped grooves can be the same or different, as long as the anti-pulling requirements of the lead-out terminal can be met, and no limitation is made herein. The depth and width of the second groove 1521 are as described above and will not be elaborated herein.

[0057] In other embodiments, the second groove can be a curved shape or any other suitable geometric shape, as long as the insulating filling material can be fully filled into the second groove, and no limitation is made herein.

[0058] A connecting hole 1522 is provided at one end of the external connection part 1520 away from the internal connection part 1510. The connecting hole 1522 is arranged along the axial direction of the outlet terminal 150 and is used to connect the connector. The connecting hole 1522 extends inward along the axial direction of the outlet terminal 150 but does not pass through the external connection part 1520, that is, the other end of the connecting hole 1522 terminates inside the external connection part 1520 without penetrating the external connection part 1520. The length of the connecting hole 152 along the axial direction of the outlet terminal 150 is defined as the depth of the connecting hole 152. The depth of the connecting hole 152 is two-thirds of the length of the external connection part 1520 to ensure the strength of the electrical connection. Furthermore, the diameter and depth of the connecting hole 1522 can be adjusted according to the specific application requirements, but the characteristic of not passing through the external connection part 1520 is always maintained. Combined with Figure 15 In this embodiment, the connection hole 1522 is distributed at the center of the end surface of the external connection part 1520. The connection hole 1522 is a threaded hole for connecting a connector, and the connector is connected to the connection hole by a bolt. In other embodiments, the connection hole can be distributed at a non-central position of the end surface of the external connection part, as long as it can meet the electrical connection of the high-voltage winding, and there is no limitation here.

[0059] In this embodiment, the outlet terminal 150 is made of copper material, and the first groove 1511 and the second groove 1521 are both processed by turning, which is convenient for material acquisition and simple processing. In other embodiments, the outlet terminal can also be made of other materials, as long as it can be electrically connected to the high-voltage winding and the connector, and there is no limitation here; the first groove and the second groove can also be processed by other methods, as long as the outlet terminal can have excellent anti-pulling characteristics and anti-torsion characteristics, and there is no limitation here.

[0060] Combination Figures 6 to 9 , the high-voltage insulation layer 1330 wraps the high-voltage coil 1320 and the winding body 1310 to form the high-voltage winding 130. Among them, 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.

[0061] After the high-voltage coil 1320 and the winding body 1310 are covered with the high-temperature vulcanized silicone rubber by 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. The high-temperature vulcanized silicone rubber also fills the first groove 1511 and the second groove 1521 of the output terminal 150 at the same time, so that the output terminal 150 has good torsion resistance and pull-out resistance. The high-temperature vulcanized silicone rubber does not cover the inner wall of the winding body 1310, 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. The high-temperature vulcanized silicone rubber also does not cover the connection hole 1522 of the output terminal 150, so that the output terminal 150 can be electrically connected to the high-voltage winding 130 and the connecting piece by bolts or the like.

[0062] The beneficial effects of the present application are as follows: the outlet terminal of the high-voltage winding of the present application has a prismatic structure, is easy to process, and its own polygonal end face can provide a certain anti-torsion property. By providing a first axial groove filled with an elastomer material, the outlet terminal can obtain good anti-torsion properties in the circumferential direction; by providing a second circumferential groove filled with an elastomer material, the outlet terminal can obtain good anti-pullout properties in the axial direction, thereby preventing the outlet terminal from escaping from the high-voltage insulation layer when connecting the connector outside the high-voltage winding, thereby ensuring product quality.

[0063] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A high voltage winding, characterized in that: It includes a winding body, a high-voltage coil, a high-voltage insulation layer and an outlet terminal, the high-voltage insulation layer is high-temperature vulcanized silicone rubber, the outlet terminal is a prismatic structure as a whole, and the outlet terminal includes an internal connection part and an external connection part connected to each other, the internal connection part is used to connect the wire inside the high-voltage winding, and the external connection part is used to connect the connector outside the high-voltage winding. A plurality of first grooves are opened on the outer periphery of the internal connection part, and the first grooves are arranged along the axial direction of the outlet terminal. A plurality of second grooves are arranged on the outer periphery of the external connection part, and the second grooves are arranged along the circumferential direction of the outlet terminal. The high-temperature vulcanized silicone rubber wraps the winding body and the high-voltage coil, and fills the first groove and the second groove.

2. The high voltage winding according to claim 1, characterized in that: A wiring hole is provided at one end of the internal connection part away from the external connection part for connecting the wire, and the shape and size of the wiring hole match the shape and size of the cross section of the wire.

3. The high voltage winding according to claim 1, characterized in that: A connecting hole is provided at one end of the external connection portion away from the internal connection portion. The connecting hole is arranged along the axial direction of the outlet terminal and is used to connect the connecting piece.

4. The high voltage winding according to claim 1, characterized in that: The second groove is a circular groove, and a plurality of the second grooves are arranged at intervals along the axial direction of the outlet terminal.

5. The high voltage winding according to claim 1, characterized in that: The second groove is an arc-shaped groove, and a plurality of the arc-shaped grooves are staggeredly arranged on the outer periphery of the circumscribing portion.

6. The high voltage winding according to claim 1, characterized in that: The winding body includes a plurality of winding plates and a plurality of auxiliary parts. The length directions of the plurality of winding plates are arranged along the axial direction of the winding body and are evenly distributed along the circumference of the winding body. The plurality of auxiliary parts are ring-shaped and arranged at intervals along the axial direction of the winding body. The auxiliary parts are clamped and connected with the winding plates.

7. The high voltage winding according to claim 6, characterized in that: A plurality of winding grooves are arranged on the winding plate so that a plurality of comb teeth are formed on one side of the winding plate for winding the high voltage coil.

8. The high voltage winding according to claim 6, characterized in that: The winding body also includes a plurality of winding parts. The winding board is provided with a plurality of winding parts movable along the winding board. A winding groove is formed between two adjacent winding parts on the winding board for winding the high-voltage coil.

9. The high voltage winding according to claim 8, characterized in that: A movable groove is arranged at the bottom where the winding member is connected to the winding plate, and the winding member and the winding plate are slidably connected via the movable groove, so that the winding member can move along the winding plate.

10. The high voltage winding according to claim 9, characterized in that: The winding member is a rectangular plate member, and the moving groove is a T-shaped groove.

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