WO2017129073A1 - 折叠式立体双开口铁芯干式变压器 - Google Patents

折叠式立体双开口铁芯干式变压器 Download PDF

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Publication number
WO2017129073A1
WO2017129073A1 PCT/CN2017/072073 CN2017072073W WO2017129073A1 WO 2017129073 A1 WO2017129073 A1 WO 2017129073A1 CN 2017072073 W CN2017072073 W CN 2017072073W WO 2017129073 A1 WO2017129073 A1 WO 2017129073A1
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Prior art keywords
iron core
frame
core
group
belt group
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PCT/CN2017/072073
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English (en)
French (fr)
Inventor
齐侠
齐会南
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齐侠
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Priority claimed from CN201710013180.0A external-priority patent/CN107342153A/zh
Application filed by 齐侠 filed Critical 齐侠
Publication of WO2017129073A1 publication Critical patent/WO2017129073A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support

Definitions

  • the invention relates to the technical field of transformers, in particular to a folding stereo double-open core dry type transformer.
  • Dry-type transformers are one type of transformer that is cooled by air convection.
  • the closed three-dimensional triangular-core iron core dry-type transformer is completely symmetrical due to its three core magnetic circuits, and the energy-saving effect is remarkable.
  • the core of the closed triangular core transformer is closed, the process of assembling the coil in the process of manufacturing the transformer is complicated, the production efficiency is low, the quality is difficult to control, and the product maintenance is difficult, which seriously affects its development.
  • the advent of a detachable three-dimensional open-width triangular core transformer solves the above problems, but there are still some deficiencies, such as: the open docking position can only be concentrated on the upper end of the iron core column, which is extremely easy. Loose, displaced, deformed, and the seam buried in the end of the coil brings great inconvenience to the back iron core, which not only affects the core performance, but also reduces the quality of the transformer.
  • the object of the present invention is to provide a folded three-dimensional open-core iron core dry transformer to solve the problems of poor mechanical strength, poor resistance to sudden short circuit, and low insertion efficiency of the existing dry type transformer core.
  • a folded three-dimensional open-core iron core dry transformer which comprises three single-frame iron cores of the same size and the same size and structure, which are assembled at an angle of 120° at a central angle.
  • the iron core group comprises a single-frame iron core, a single-frame iron core yoke, a single-frame iron core lower yoke and a bent inclined surface, wherein the single-frame iron core is composed of an inner layer and a middle layer
  • the strip group and the outer strip group are sequentially stacked, and the middle strip group includes a middle first strip group and a middle second strip group stacked on the outer side of the middle first strip group, and the outer layer is
  • the belt set includes an outer first belt group, an outer second belt group stacked on the outer side of the outer first belt group, and an outer layer stacked on the outer side of the outer second belt group a three-belt group, wherein the inner layer strip group, the middle layer first strip group and the outer layer first strip group are respectively symmetrically arranged in a single frame by a plurality of openings
  • the single-ring material frame of the upper end of the iron core column is stacked, and the second layer of the middle layer and the second group of the outer layer are respectively symmetrically
  • the distance between the opening on each single-ring strip frame and the bending angle located on the same side of the opening is ⁇ 5 mm, and the single-ring strip frame forming the outer third belt group
  • the upper openings are all located in a cylindrical space extending upward along the core of the transformer core, wherein the transformer core is assembled by a single-frame iron core, and the outer side of the transformer core is provided with a low voltage.
  • the casting coil has a high-pressure pouring coil disposed outside the low-pressure casting coil, and a struts are arranged between the low-pressure casting coil and the high-pressure casting coil, and the three single-frame iron core upper yokes are fixed by the upper clamping member, and the three single-frame iron cores are arranged under the core
  • the yoke is fixed by the lower clamp member, and the upper clamp member and the lower clamp member are fixed by the side tie rods, and the bottom portion of the lower clamp member Given connection to the channel, is also provided with a cooling fan located outside of the high-pressure cast coil channel.
  • the low pressure casting coil and the high pressure casting coil are both epoxy casting coils.
  • the middle layer belt group and/or the outer layer material belt group constituting the single-frame iron core are a plurality of groups, and the layer material belt groups in each group are sequentially stacked, and the outer layer belt groups of each group are sequentially stacked.
  • the single-ring strip frame constituting the inner layer strip set, the middle layer strip set and the outer layer strip set is correspondingly provided with eight 135 degree bend angles.
  • the single-ring strip frame constituting the inner layer strip set, the middle layer strip set and the outer layer strip set is correspondingly provided with twelve 150 degree bend angles.
  • the middle second tape set and the outer second tape set respectively comprise a plurality of single ring strip frames symmetrically disposed on the first bending slope and a plurality of stacked symmetrically disposed at the first fold a single-ring strip frame outside the single-ring strip frame on the curved slope and symmetrically disposed on the second bend slope surface, wherein the first bend slope is located on the single-frame iron core pillar and the single-frame iron core upper yoke The first end is connected to the single-frame iron core, and the two ends of the second bending inclined surface are respectively connected with the first bending inclined surface and the single-frame iron core upper yoke.
  • the opening positions of the single-ring strips constituting the inner layer strip group, the middle layer strip group and the outer layer strip group are arranged in a staggered arrangement.
  • the cross section of the transformer core stud is oblong or round-like inscribed polygon or stepped or rectangular or circular.
  • the single-frame iron core constituting the iron core group in the folded three-dimensional double-core iron core dry type transformer is composed of an inner layer belt group, a middle layer belt group and an outer layer belt group, and constitutes an inner layer belt group.
  • the opening on the single-ring strip frame of the middle layer strip group and the outer layer strip group and the bending angle on the single-ring strip frame and closest to the opening ⁇ 5 mm so that the single-ring material
  • the framed opening forms a limiting portion with a length of ⁇ 5 mm, and the limiting portion can play a role of the upper and lower or/and the left and right direction of the single-ring strip frame located inside thereof, specifically: when the core After the insertion is completed, the outer third belt group constituting the outer belt group can prevent the second belt group from being swayed on the inner side, and the outer second belt group can prevent the outer belt from being located inside.
  • the turbulence of the first strip group of the layer achieves the effect of locking in the outer strip group, and the middle second strip group constituting the middle strip group can prevent the turbulence of the middle first strip group located at the inner side thereof.
  • the purpose of locking in the middle belt group is achieved, and at the same time, the outer belt group as a whole can also prevent the positioning
  • the middle layer of the inner belt is swayed, and the middle belt group can also prevent the turbulence of the inner belt group located inside thereof, realizing between the outer belt group, the middle belt group and the inner belt group
  • the purpose of locking is to solve the problem that the iron core which is only open at the upper end of the core of the transformer core is prone to longitudinal looseness, displacement, deformation and poor resistance to sudden short circuit under the action of a strong electromagnetic field, and at the same time, the belt group
  • the locking function in the inter-belt and the belt group greatly improves the mechanical strength of the iron core and improves the overall quality of the folded three-dimensional double-core iron
  • the single-frame iron core of the folded three-dimensional double-core iron core dry transformer increases one opening of the existing iron core to three openings, and the increased opening portions are exposed outside the coil, which is obviously visible and convenient.
  • the insertion of the iron core improves the efficiency of the iron core insertion and reduces the labor cost.
  • the iron core after the opening is dispersed by dispersing the opening position to reduce the vibration and improve the noise, further improving the anti-burst of the iron core.
  • the openings on the single-ring strip frame forming the outer third strip group are located in the cylindrical space extending upward along the core of the transformer core, which facilitates the assembly of the coil, so that the coil is placed from top to bottom. The outside of the transformer core is not stuck during the process.
  • FIG. 1 is a schematic structural view of a foldable stereo double-open core dry type transformer according to the present invention.
  • FIG. 2 is a schematic structural view of an embodiment of a core group
  • FIG. 3 is a schematic structural view of another embodiment of a core group
  • FIG. 4 is a schematic structural view of an embodiment of a single-frame iron core
  • FIG. 5 is a schematic structural view of another embodiment of a single-frame iron core
  • Figure 6 is a schematic structural view of an embodiment of an inner layer strip
  • Figure 7 is a schematic view showing the structure of another embodiment of the inner layer strip
  • Figure 8 is a schematic structural view of an embodiment of a middle layer strip
  • FIG. 9 is a schematic structural view of another embodiment of a middle layer strip
  • Figure 10 is a schematic structural view of an embodiment of an outer layer strip
  • Figure 11 is a schematic view showing the structure of another embodiment of the outer layer strip
  • Figure 12 is a cross-sectional view of a transformer core core in an oblong shape
  • Figure 13 is a cross-sectional view of a transformer core stud having a circle-inscribed polygon
  • Figure 14 is a cross-sectional view of a stepped transformer core stud
  • Figure 15 is a cross-sectional view of a rectangular core of a transformer
  • Figure 16 is a cross-sectional view of a transformer core core in a circular shape.
  • the foldable three-dimensional open-core iron core transformer comprises three single-frame iron cores 1 which are identical in size and have the same structure and are assembled at an angle of 120°.
  • the single-frame iron core 1 includes a single-frame iron core stud 11, a single-frame iron core upper yoke 12, a single-frame iron core lower yoke 13 and a bending slope 14 .
  • the single-frame iron core 1 is sequentially assembled from the inner layer belt group 3, the middle layer material belt group 4 and the outer layer material belt group 5, as shown in FIG. 8 and FIG. 9, the middle layer material belt group 4 includes the middle layer.
  • the outer strip set 5 includes an outer first strip Group 51, an outer second belt set 52 stacked on the outer side of the outer first belt set 51, and an outer third belt set 53 stacked on the outer side of the outer second belt set 52 , wherein the inner layer strip set 3 (shown in Figures 6 and 7), the middle first strip set 41 (shown in Figures 8 and 9) and the outer first strip set 51 ( Figures 10 and 11) Illustrated) symmetrically disposed at the upper end of the single-frame core stud 11 by a plurality of openings
  • the loops are stacked in a frame, and the middle second strip set 42 (shown in Figures 8 and 9) and the outer second strip set 52 (shown in Figures 10 and 11) are symmetrically arranged by a plurality of openings, respectively.
  • a single-ring strip frame is formed on the bent bevel 14 between the single-frame iron core stud 11 and the single-frame iron core upper yoke 12, and the outer third strip set 53 (Figs. 10 and 11) Shown by a plurality of openings symmetrically disposed on the ends of the single-frame core upper yoke 12, wherein the openings on each of the single-ring strip frames are located above and away from The distance of the opening angle of the opening is ⁇ 5 mm, and the openings on the single-ring belt frame constituting the outer third belt group 53 are located in the cylindrical space extending upward along the transformer core 21, as shown in FIG. As shown in FIG.
  • the openings on the single-ring strip frame are located in the range of the A, B, and C regions, wherein the area A represents an openable area on the single-frame iron core column, and the area is located in the single-frame iron.
  • the region is located in a cylindrical space extending upward along the core of the transformer core and is at a distance of ⁇ 5 mm from the bending angle, wherein the transformer core stud 21 is formed by combining single-frame iron cores 11 , wherein
  • the transformer core studs are shown in FIG.
  • the outer side of the 21 is provided with a low-pressure casting coil (not shown), and the outer side of the low-pressure casting coil is provided with a high-pressure casting coil 22, and a struts (not shown) are disposed between the low-pressure casting coil and the high-pressure casting coil 22,
  • Three single frame iron The core upper yoke 12 is fixed by the upper clamp member 6, and the three single frame core lower yokes 13 are fixed by the lower clamp member 7, the upper clamp member 6 and the lower clamp member 7 are fixed by the side tie rods 8, and the bottom portion of the lower clamp member 7 is fixedly connected to
  • the channel steel 9 is further provided with a cooling fan 10 located outside the high-pressure casting coil 22, wherein the low-pressure casting coil and the high-pressure casting coil 22 are preferably epoxy casting coils.
  • the single-frame iron core of the iron core group in the folded three-dimensional double-core iron core dry type transformer is composed of an inner layer belt group, a middle layer belt group and an outer layer belt group, and constitutes an inner layer belt group and a middle layer material.
  • the opening on the single-ring strip frame of the belt set and the outer strip set is ⁇ 5 mm from the bend angle on the single-ring strip frame and closest to the opening, so that the single-ring strip frame A limiting portion having a length of ⁇ 5 mm is formed at the opening, and the limiting portion can function as a limit on the upper and lower or/and the left and right directions of the single-ring strip frame located inside thereof, specifically: when the core is inserted Thereafter, the outer third belt set constituting the outer belt group can prevent the second belt group from being swayed on the inner side, and the outer second belt group can prevent the outer layer on the inner side from being first.
  • the turbulence of the strip group achieves the locking effect in the outer strip group, and the middle second strip group constituting the middle strip group can prevent the turbulence of the middle first strip group located on the inner side thereof, realizing the middle layer
  • the outer strip group as a whole can also prevent the inner side of the strip
  • the middle layer belt group is swayed, and the middle layer belt group can also prevent the turbulence of the inner layer belt group located inside thereof, thereby realizing the locking between the outer layer belt group, the middle layer belt group and the inner layer belt group.
  • the purpose is to solve the problem that the iron core which is only open at the upper end of the core of the transformer core is prone to longitudinal looseness, displacement, deformation and poor resistance to sudden short circuit under the action of a strong electromagnetic field, and at the same time,
  • the locking function in the belt group greatly improves the mechanical strength of the iron core, and improves the overall quality of the folded three-dimensional double-core iron core dry transformer.
  • the single-frame iron core of the dry type transformer will have the existing iron core.
  • One opening is increased to three openings, and the increased opening portions are exposed outside the coil, which is obviously visible, which facilitates the insertion of the iron core, improves the efficiency of inserting the core, reduces the labor cost, and increases the core after the opening.
  • the openings on the single-ring material frame of the third-layer tape group forming the outer layer are located along the edge.
  • the inner cylindrical space extending upward pressure core stem to facilitate the set of coils such that the coil set in a top-down process will not be stuck in the outer side of the stem in the transformer core.
  • the middle-layer material group 4 of the single-frame iron core 1 and / or the outer strip group 5 is a plurality of groups, and the middle strip groups 4 in each group are sequentially stacked, and the outer strip groups 5 of each group are sequentially stacked.
  • FIG. 2 As shown in FIG. 2, FIG. 4, FIG. 6, FIG. 8 and FIG. 10, eight single-loop strip frames constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are correspondingly arranged with eight A bending angle of 135 degrees, that is, four bending bevels are arranged on each single ring material frame.
  • FIG. 5 As shown in FIG. 3, FIG. 5, FIG. 7, FIG. 9 and FIG. 11, 12 sets of single-loop material strips constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are correspondingly arranged.
  • a bend angle of 150 degrees, that is, eight bend bevels are placed on each single-ring strip frame.
  • the middle second tape group 42 and the outer second tape group 52 respectively include a plurality of openings.
  • a single-ring strip frame symmetrically disposed on the first bending slope and a plurality of single-ring strip frames stacked on the first bending slope symmetrically on the outer side of the opening and symmetrically disposed on the second bending slope a single-ring material frame, wherein the first bending slope is located between the single-frame iron core stud 11 and the single-frame iron core upper yoke 12, and one end is connected with the single-frame iron core stud 11 and the second bent inclined surface is two The ends are respectively connected to the first bending slope and the single-frame core upper yoke 12.
  • the opening positions of the single-ring strip frames constituting the inner layer strip group 3, the middle layer strip group 4 and the outer layer strip group 5 are stepped by steps.
  • the stacking is arranged in such a way that the iron core is minimized due to the opening structure, and the mechanical strength of the core is strengthened and improved.
  • the cross section of the transformer core 21 is oblong (as shown in FIG. 12) or a circle-inscribed polygon (as shown in FIG. 13) or a stepped type (as shown in FIG. 14) or a rectangle. (as shown in Figure 15) or circular (as shown in Figure 16).

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  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

本发明公开了一种折叠式立体双开口铁芯干式变压器，包括由三个单框铁芯拼合而成的铁芯组，单框铁芯包括内层料带组、中层料带组和外层料带组，组成内层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端，组成中层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端和单框铁芯芯柱与单框铁芯上轭之间的折弯斜面上，组成外层料带组的单圈料带框的开口对称设置在单框铁芯芯柱的上端、单框铁芯芯柱与单框铁芯上轭之间的折弯斜面上和单框铁芯上轭的两端，每个单圈料带框上的开口与离其最近的折弯角的距离≥5mm。本发明机械强度高、抗突发短路能力强、插装效率高。

Description

折叠式立体双开口铁芯干式变压器 技术领域
本发明涉及变压器技术领域，特别涉及折叠式立体双开口铁芯干式变压器。
背景技术
干式变压器是变压器种类中的一种，通过空气对流进行冷却。近年来，随着我国配电网建设投入不断增大和国家对高效节能型变压器的大规模推广，闭口立体三角形卷铁芯干式变压器因其三个铁芯磁路完全对称，节能效果显著而被广泛应用，然而，因为闭口三角型铁芯变压器的铁芯为闭口，所以在制造变压器的过程中套装线圈工艺复杂，生产效率低，质量不易控制，产品维修困难，严重影响了它的发展。目前，一种可拆装的折叠式立体开口三角形铁芯变压器的问世，解决了上述问题，但仍存在一定的不足，如：开口对接位置只能集中设置在铁芯芯柱的上端，极易造成松动、移位、变形，隐埋在线圈端部内的接缝给回插铁芯带来了很大的不便，不仅影响了铁芯性能，也降低了变压器品质。
因此，如何对现有的干式变压器进行结构上的改进，以提高其机械强度、抗突发短路能力和插装效率，成为人们亟待解决的问题。
发明内容
鉴于此，本发明的目的在于提供一种折叠式立体双开口铁芯干式变压器，以解决现有干式变压器铁芯机械强度差、抗突发短路能力差、插装效率低等问题。
为解决上述问题，本发明提供的技术方案是：折叠式立体双开口铁芯干式变压器，包括由三个独立且大小结构均相同的单框铁芯以中心角120°的角度拼合而成的铁芯组，所述单框铁芯包括单框铁芯芯柱、单框铁芯上轭、单框铁芯下轭和折弯斜面，所述单框铁芯由内层料带组、中层料带组和外层料带组依次叠装而成，中层料带组包括中层第一料带组和叠装在所述中层第一料带组外侧的中层第二料带组，外层料带组包括外层第一料带组、叠装在所述外层第一料带组外侧的外层第二料带组和叠装在所述外层第二料带组外侧的外层第三料带组，其中，内层料带组、中层第一料带组和外层第一料带组分别由多个开口对称设置在单框 铁芯芯柱的上端的单圈料带框叠装而成，中层第二料带组和外层第二料带组分别由多个开口对称设置在单框铁芯芯柱与单框铁芯上轭之间的折弯斜面上的单圈料带框叠装而成，外层第三料带组由多个开口对称设置在单框铁芯上轭的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，其中，所述变压器铁芯芯柱由单框铁芯芯柱拼合而成，所述变压器铁芯芯柱外侧套装有低压浇注线圈，低压浇注线圈外侧套装有高压浇注线圈，所述低压浇注线圈与高压浇注线圈之间设置有撑条，三个单框铁芯上轭通过上夹件固定，三个单框铁芯下轭通过下夹件固定，上夹件和下夹件通过侧拉杆固定，下夹件底部固定连接于槽钢上，所述槽钢上还设置有位于高压浇注线圈外侧的冷却风机。
优选，所述低压浇注线圈与高压浇注线圈均为环氧树脂浇注线圈。
进一步优选，组成单框铁芯的中层料带组和/或外层料带组为多组，且各组中层料带组依次叠装，各组外层料带组依次叠装。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框上对应设置有8个135度的折弯角。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框上对应设置有12个150度的折弯角。
进一步优选，中层第二料带组和外层第二料带组分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱与单框铁芯上轭之间且一端与单框铁芯芯柱连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭连接。
进一步优选，组成内层料带组、中层料带组和外层料带组的单圈料带框的开口对接位置均按阶梯式隔层错位排列。
进一步优选，变压器铁芯芯柱的截面呈长圆形或类圆内接多边形或台阶型或矩形或类圆形。
本发明提供的折叠式立体双开口铁芯干式变压器的有益效果如下：
1、构成该折叠式立体双开口铁芯干式变压器内的铁芯组的单框铁芯由内层料带组、中层料带组和外层料带组组成，而组成内层料带组、中层料带组和外层料带组的单圈料带框上的开口与位于所述单圈料带框上且离所述开口最近的折弯角的距离≥5mm，使得在单圈料带框的开口处均形成长度≥5mm的限位部，该限位部能起到对位于其内侧的单圈料带框的上下或/和左右方向的限位作用，具体的：当铁芯插装完成后，组成外层料带组的外层第三料带组能够防止位于其内侧的外层第二料带组的窜动，外层第二料带组能够防止位于其内侧的外层第一料带组的窜动，达到了外层料带组内锁定的效果，组成中层料带组的中层第二料带组能够防止位于其内侧的中层第一料带组的窜动，实现了中层料带组内的锁定的目的，同时，外层料带组作为一个整体还能够防止位于其内侧的中层料带组的窜动，中层料带组还能够防止位于其内侧的内层料带组的窜动，实现了外层料带组、中层料带组和内层料带组之间锁定的目的，从而解决了仅在变压器铁芯芯柱上端开口的铁芯容易在强大的电磁场的作用下产生纵向松动、移位、变形，抗突发短路能力差等问题，同时，料带组间及料带组内的锁定作用大大提高了铁芯的机械强度，提高了该折叠式立体双开口铁芯干式变压器的整体质量；
2、该折叠式立体双开口铁芯干式变压器采用的单框铁芯将现有铁芯的一处开口增加至三处开口，且增加的开口部分均暴露在线圈外，明显可见，方便了铁芯的插装，提高了铁芯插装效率，降低人工生产成本，增加开口后的铁芯通过将开口位置分散，使震动削减，对噪声有所改善，进一步提高了铁芯的抗突发短路能力；
3、组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，方便了线圈的套装，使得线圈在由上至下套装在变压器铁芯芯柱外侧的过程中不会被卡住。
附图说明
下面结合附图及实施方式对本发明作进一步详细的说明：
图1为本发明的折叠式立体双开口铁芯干式变压器结构示意图；
图2为铁芯组一实施例的结构示意图；
图3为铁芯组另一实施例的结构示意图；
图4为单框铁芯一实施例的结构示意图；
图5为单框铁芯另一实施例的结构示意图；
图6为内层料带组一实施例的结构示意图；
图7为内层料带组另一实施例的结构示意图；
图8为中层料带组一实施例的结构示意图；
图9为中层料带组另一实施例的结构示意图；
图10为外层料带组一实施例的结构示意图；
图11为外层料带组另一实施例的结构示意图；
图12为呈长圆形的变压器铁芯芯柱的截面图；
图13为呈类圆内接多边形的变压器铁芯芯柱的截面图；
图14为呈台阶形的变压器铁芯芯柱的截面图；
图15为呈矩形的变压器铁芯芯柱的截面图；
图16为呈类圆形的变压器铁芯芯柱的截面图。
具体实施方式
下面将结合具体的实施方案对本发明进行进一步的解释，但并不局限本发明。
如图1至图3所示，本发明提供的折叠式立体双开口铁芯干式变压器包括由三个独立且大小结构均相同的单框铁芯1以中心角120°的角度拼合而成的铁芯组，如图4、图5所示，所述单框铁芯1包括单框铁芯芯柱11、单框铁芯上轭12、单框铁芯下轭13和折弯斜面14，所述单框铁芯1由内层料带组3、中层料带组4和外层料带组5依次叠装而成，如图8、图9所示，中层料带组4包括中层第一料带组41和叠装在所述中层第一料带组41外侧的中层第二料带组42，如图10、图11所示，外层料带组5包括外层第一料带组51、叠装在所述外层第一料带组51外侧的外层第二料带组52和叠装在所述外层第二料带组52外侧的外层第三料带组53，其中，内层料带组3(图6和图7所示)、中层第一料带组41(图8和图9所示)和外层第一料带组51(图10和图11所示)分别由多个开口对称设置在单框铁芯芯柱11的上端的单圈料带框叠装而成，中层第二料带组42(图8和图9所示)和外层第二料带组52(图10和图11所示)分别由多个开口对称设置在单框铁芯芯柱11与单框铁芯上轭12之间的折弯斜面14上的单圈料带框叠装而成，外层第三料带组53(图10和图11所示)由多个开口对称设置在单框铁芯上轭12的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，组成外层第三料带组53的单圈料带框上的开口均位于沿变压器铁芯芯柱21向上延伸的柱形空间内，如图4、图5所示，单圈料带框上的开口均位于A、B、C区域所在的范围内，其中，区域A代表单框铁芯芯柱上的可开口区域，该区域位于单框铁芯芯柱的上端且距折弯角的距离≥5mm，区域B代表折弯斜面上的可开口区域，该区域距折弯角的距离≥mm，区域C单框铁芯上轭的可开口区域，该区域位于沿变压器铁芯芯柱向上延伸的柱形空间内且距折弯角的距离≥5mm，其中，所述变压器铁芯芯柱21由单框铁芯芯柱11拼合而成，其中，图2至图11中所示的每一个类矩形框均代表一组单圈料带框，而并不是仅代表一个单圈料带框，如图1所示，所述变压器铁芯芯柱21外侧套装有低压浇注线圈(图中未示出)，低压浇注线圈外侧套装有高压浇注线圈22，所述低压浇注线圈与高压浇注线圈22之间设置有撑条(图中未示出)，三个单框铁 芯上轭12通过上夹件6固定，三个单框铁芯下轭13通过下夹件7固定，上夹件6和下夹件7通过侧拉杆8固定，下夹件7底部固定连接于槽钢9上，所述槽钢9上还设置有位于高压浇注线圈22外侧的冷却风机10，其中，所述低压浇注线圈与高压浇注线圈22优选为环氧树脂浇注线圈。
该折叠式立体双开口铁芯干式变压器内的铁芯组的单框铁芯由内层料带组、中层料带组和外层料带组组成，而组成内层料带组、中层料带组和外层料带组的单圈料带框上的开口与位于所述单圈料带框上且离所述开口最近的折弯角的距离≥5mm，使得在单圈料带框的开口处均形成长度≥5mm的限位部，该限位部能起到对位于其内侧的单圈料带框的上下或/和左右方向的限位作用，具体的：当铁芯插装完成后，组成外层料带组的外层第三料带组能够防止位于其内侧的外层第二料带组的窜动，外层第二料带组能够防止位于其内侧的外层第一料带组的窜动，达到了外层料带组内锁定的效果，组成中层料带组的中层第二料带组能够防止位于其内侧的中层第一料带组的窜动，实现了中层料带组内的锁定的目的，同时，外层料带组作为一个整体还能够防止位于其内侧的中层料带组的窜动，中层料带组还能够防止位于其内侧的内层料带组的窜动，实现了外层料带组、中层料带组和内层料带组之间锁定的目的，从而解决了仅在变压器铁芯芯柱上端开口的铁芯容易在强大的电磁场的作用下产生纵向松动、移位、变形，抗突发短路能力差等问题，同时，料带组间及料带组内的锁定作用大大提高了铁芯的机械强度，提高了该折叠式立体双开口铁芯干式变压器的整体质量另外，该干式变压器采用的单框铁芯将现有铁芯的一处开口增加至三处开口，且增加的开口部分均暴露在线圈外，明显可见，方便了铁芯的插装，提高了铁芯插装效率，降低人工生产成本，增加开口后的铁芯通过将开口位置分散，使震动削减，对噪声有所改善，进一步提高了铁芯的抗突发短路能力，同时，组成外层第三料带组的单圈料带框上的开口均位于沿变压器铁芯芯柱向上延伸的柱形空间内，方便了线圈的套装，使得线圈在由上至下套装在变压器铁芯芯柱外侧的过程中不会被卡住。
随着单圈料带框个数的不断增加，为更好的实现料带组间和料带组内锁定的效果，作为技术方案的改进，组成单框铁芯1的中层料带组4和/或外层料带组5为多组，且各组中层料带组4依次叠装，各组外层料带组5依次叠装。
如图2、图4、图6、图8和图10所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框上对应设置有8个135度的折弯角，即：每个单圈料带框上设置四个折弯斜面。
如图3、图5、图7、图9和图11所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框上对应设置有12个150度的折弯角，即：每个单圈料带框上设置八个折弯斜面。
当组成变压器铁芯的单圈料带框上设置八个折弯斜面时，如图8和图10所示，中层第二料带组42和外层第二料带组52分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱11与单框铁芯上轭12之间且一端与单框铁芯芯柱11连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭12连接。
作为技术方案的改进，如图6至图11所示，组成内层料带组3、中层料带组4和外层料带组5的单圈料带框的开口对接位置均按阶梯式隔层错位排列，从而，使该铁芯由于开口结构所产生的铁损降至最低，使铁芯的机械强度得到了加强和提高。
作为技术方案的改进，变压器铁芯芯柱21的截面呈长圆形(如图12所示)或类圆内接多边形(如图13所示)或台阶型(如图14所示)或矩形(如图15所示)或类圆形(如图16所示)。
本发明的具体实施方式是按照递进的方式进行撰写的，着重强调各个实施方案的不同之处，其相似部分可以相互参见。
上面结合附图对本发明的实施方式做了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。

Claims (8)

  1. 折叠式立体双开口铁芯干式变压器，包括由三个独立且大小结构均相同的单框铁芯(1)以中心角120°的角度拼合而成的铁芯组，所述单框铁芯(1)包括单框铁芯芯柱(11)、单框铁芯上轭(12)、单框铁芯下轭(13)和折弯斜面(14)，其特征在于，所述单框铁芯(1)由内层料带组(3)、中层料带组(4)和外层料带组(5)依次叠装而成，中层料带组(4)包括中层第一料带组(41)和叠装在所述中层第一料带组(41)外侧的中层第二料带组(42)，外层料带组(5)包括外层第一料带组(51)、叠装在所述外层第一料带组(51)外侧的外层第二料带组(52)和叠装在所述外层第二料带组(52)外侧的外层第三料带组(53)，其中，内层料带组(3)、中层第一料带组(41)和外层第一料带组(51)分别由多个开口对称设置在单框铁芯芯柱(11)的上端的单圈料带框叠装而成，中层第二料带组(42)和外层第二料带组(52)分别由多个开口对称设置在单框铁芯芯柱(11)与单框铁芯上轭(12)之间的折弯斜面(14)上的单圈料带框叠装而成，外层第三料带组(53)由多个开口对称设置在单框铁芯上轭(12)的两端的单圈料带框叠装而成，其中，位于每个单圈料带框上的开口与位于其上且离所述开口最近的折弯角的距离均≥5mm，组成外层第三料带组(53)的单圈料带框上的开口均位于沿变压器铁芯芯柱(21)向上延伸的柱形空间内，其中，所述变压器铁芯芯柱(21)由单框铁芯芯柱(11)拼合而成，所述变压器铁芯芯柱(21)外侧套装有低压浇注线圈，低压浇注线圈外侧套装有高压浇注线圈(22)，所述低压浇注线圈与高压浇注线圈(22)之间设置有撑条，三个单框铁芯上轭(12)通过上夹件(6)固定，三个单框铁芯下轭(13)通过下夹件(7)固定，上夹件(6)和下夹件(7)通过侧拉杆(8)固定，下夹件(7)底部固定连接于槽钢(9)上，所述槽钢(9)上还设置有位于高压浇注线圈(22)外侧的冷却风机(10)。
  2. 按照权利要求1所述的折叠式立体双开口铁芯干式变压器，其特征在于：所述低压浇注线圈与高压浇注线圈(22)均为环氧树脂浇注线圈。
  3. 按照权利要求1所述的折叠式立体双开口铁芯干式变压器，其特征在于：组成单框铁芯(1)的中层料带组(4)和/或外层料带组(5)为多组，且各组中层料带组(4)依次叠装，各组外层料带组(5)依次叠装。
  4. 按照权利要求1所述的折叠式立体双开口铁芯干式变压器，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框上对应设置有8个135度的折弯角。
  5. 按照权利要求1所述的折叠式立体双开口铁芯干式变压器，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框上对应设置有12个150度的折弯角。
  6. 按照权利要求5所述的折叠式立体双开口铁芯干式变压器，其特征在于：中层第二料带组(42)和外层第二料带组(52)分别包括多个开口对称设置在第一折弯斜面上的单圈料带框和多个叠装于开口对称设置在第一折弯斜面上的单圈料带框外侧且开口对称设置在第二折弯斜面上的单圈料带框，其中，第一折弯斜面位于单框铁芯芯柱(11)与单框铁芯上轭(12)之间且一端与单框铁芯芯柱(11)连接，第二折弯斜面的两端分别与第一折弯斜面和单框铁芯上轭(12)连接。
  7. 按照权利要求1所述的折叠式立体双开口铁芯干式变压器，其特征在于：组成内层料带组(3)、中层料带组(4)和外层料带组(5)的单圈料带框的开口对接位置均按阶梯式隔层错位排列。
  8. 按照权利要求1至7中任一项所述的折叠式立体双开口铁芯干式变压器，其特征在于：变压器铁芯芯柱(21)的截面呈长圆形或类圆内接多边形或台阶型或矩形或类圆形。
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CN111799070A (zh) * 2020-07-28 2020-10-20 上海盖能电气有限公司 一种方便绕制的铁芯结构
CN114121453A (zh) * 2021-11-11 2022-03-01 中兴电气(江苏)股份有限公司 一种三绕组双分裂环氧树脂浇注干式升压变压器
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