CN210575472U

CN210575472U - Anti-short circuit coil and oil-immersed amorphous alloy transformer

Info

Publication number: CN210575472U
Application number: CN201921639936.3U
Authority: CN
Inventors: 关义优; 朱燕春; 冯洁磊; 张家鹏
Original assignee: Hainan Weite Electric Group Co ltd; Hainan Weite Electric Power Equipment Co ltd
Current assignee: Hainan Weite Electric Group Co ltd; Hainan Weite Electric Power Equipment Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-05-19
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses an anti-short circuit coil, outer coil surround in the periphery of inner coil, through full adhesive tape bonding packing between each layer of outer coil to make each layer of inner coil closely bond each other, closely bond between each layer of outer coil, improve self mechanical strength, prevent that the separation phenomenon from appearing between each layer of coil; the short shaft edges of the inner coil and the outer coil are outwards protruded to form an arch, and the lateral acting force of the short shaft edges is partially converted into acting force along the short shaft edges by the arch structure, so that the short shaft edges have stronger deformation resistance; adopt the utility model provides an anti short circuit coil has increased structural strength, has better anti deformability, need not set up an epoxy glass section of thick bamboo in the inner circle and bear the effort that the coil warp, and the structure is simpler, and the cost of manufacture is lower. The utility model also provides an oil-immersed metallic glass transformer can realize the same technological effect.

Description

Anti-short circuit coil and oil-immersed amorphous alloy transformer

Technical Field

The utility model relates to a transformer technical field further relates to an anti short circuit coil. Furthermore, the utility model discloses still relate to an oil-immersed metallic glass transformer.

Background

The Amorphous alloy Transformer (Amorphous Metal Transformer) is a low-loss and high-energy-efficiency power Transformer, the Amorphous alloy Transformer takes iron-based Amorphous Metal as an iron core, and because the material does not have a long-range ordered structure, the magnetization and demagnetization of the Amorphous alloy Transformer are easier than those of common magnetic materials, the iron loss (namely no-load loss) of the Amorphous alloy Transformer is 70-80% lower than that of a traditional Transformer which generally adopts silicon steel as the iron core. Because the loss is reduced, the power generation requirement is reduced, the emission of greenhouse gases such as carbon dioxide is correspondingly reduced, and the energy-saving and environment-friendly effects are better achieved.

In order to prevent the coil from deforming, the prior structure mostly adopts a square epoxy glass cylinder to support the coil, namely a low-voltage coil is wound on the square epoxy glass cylinder, and the epoxy glass cylinder bears the acting force of the deformation of the coil; although this structure can increase amorphous coil's anti short circuit ability to a certain extent, its anti short circuit ability relies on the intensity of an epoxy glass section of thick bamboo, along with the increase of capacity, the thickness and the coil external diameter of an epoxy glass section of thick bamboo all show and increase, have greatly promoted amorphous coil's cost, are unfavorable for the competition and the popularization of product.

Therefore, how to improve the short-circuit resistance of the amorphous alloy transformer without significantly increasing the cost thereof is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides an anti short circuit coil can improve amorphous alloy transformer's anti short circuit ability, does not show again and increases its cost, and concrete scheme is as follows:

an anti-short circuit coil comprises an inner coil and an outer coil, wherein all layers of the inner coil and all layers of the outer coil are respectively bonded and filled by adhesive paper;

the short axis sides of the inner coil and the outer coil are outwards protruded to form an arch.

Optionally, a step paperboard is arranged on the inner side surface of the inner coil, and the thickness of the step paperboard gradually decreases from the middle to two sides.

Optionally, the short-axis edges of the inner layer coil and the outer layer coil are bound and fixed through a long-axis strap, and the long-axis strap is bound and fixed with the step paperboard;

the long axis edges of the inner coil and the outer coil are bound and fixed through short axis binding bands.

Optionally, the long axis sides of two adjacent coil groups contacting each other are fixed by the short axis binding band in a binding manner.

Optionally, at least two groups of long-axis straps are arranged, and the long-axis straps are arranged in an inclined symmetrical mode.

Optionally, the long and short axis straps are semi-dry fiberglass sticky tape.

The utility model also provides an oily formula metallic glass transformer, including above-mentioned arbitrary item anti short circuit coil.

The utility model provides an anti-short circuit coil, including inner coil and outer coil, outer coil encircles in the periphery of inner coil, bonds through full adhesive tape between each layer of inner coil and packs, bonds through full adhesive tape between each layer of outer coil and packs to make each layer of inner coil closely bond each other, closely bond between each layer of outer coil, improve self mechanical strength, prevent that the separation layer phenomenon from appearing between each layer of coil; the short shaft edges of the inner coil and the outer coil are outwards protruded to form an arch, and the lateral acting force of the short shaft edges is partially converted into acting force along the short shaft edges by the arch structure, so that the short shaft edges have stronger deformation resistance; adopt the utility model provides an anti short circuit coil has increased structural strength, has better anti deformability, need not set up an epoxy glass section of thick bamboo in the inner circle and bear the effort that the coil warp, and the structure is simpler, and the cost of manufacture is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a diagram of an axial structure of an anti-short circuit coil provided by the present invention;

FIG. 2A is a schematic view of an axial structure of a ladder paperboard;

FIG. 2B is a schematic view of a long-axis strap;

FIG. 3A is an isometric view of three coil sets in combination with one another;

fig. 3B is a front view of three coil groups combined with each other.

The figure includes:

inner layer coil 1, outer layer coil 2, ladder cardboard 3, major axis bandage 4, minor axis bandage 5.

Detailed Description

The core of the utility model is to provide an anti short circuit coil, can improve the anti short circuit ability of metallic glass transformer, do not show again and increase its cost.

In order to make those skilled in the art better understand the technical solution of the present invention, the following will describe the short-circuit resisting coil and the oil-immersed amorphous alloy transformer in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the axial structure diagram of the short-circuit resisting coil provided by the present invention includes an inner coil 1 and an outer coil 2, the inner coil 1 has a small size, the outer coil 2 has a large size, and the outer coil 2 surrounds the inner coil 1; inlayer coil 1 and outer coil 2 are formed by the winding of multilayer wire respectively, and through full adhesive tape bonding packing between each layer of inlayer coil 1 and between each layer of outer coil 2 respectively, full adhesive tape is the material that all covers colloid for the positive and negative, fills the clearance between each layer coil completely, can effectively glue tightly through full adhesive tape between the coil layer, solves the coil and separates the layer phenomenon, improves coil self mechanical strength.

The minor axis limit of inlayer coil 1 and outer coil 2 outwards bulges and is the arch, and the minor axis limit also is the side that the length is shorter, and the minor axis limit and the major axis limit smooth transition of inlayer coil 1 and outer coil 2, minor axis limit outwards bulge and are the arch, and when the domes received lateral pressure, can transmit pressure downwards and outwards for adjacent part, therefore the domes can bear bigger pressure, increase the resistance to deformation ability of coil.

By adopting the anti-short circuit coil provided by the utility model, the full-glue paper is filled between each layer of coils of the inner coil 1 and the outer coil 2, so that the anti-short circuit coil has stronger anti-separation performance, and the mechanical strength of the coil is increased; the coil is arranged into an arch structure, and when the coil is stressed, the lateral deformation force can be partially converted into axial force, so that the pressure is converted into acting force along the direction of the coil, and the stress structure is better and has better mechanical property; the whole anti-deformation capability of the short circuit resisting coil is stronger, the deformation force can be resisted only by the structure of the coil, an epoxy glass cylinder does not need to be arranged in the inner ring to bear the acting force of the deformation of the coil, the structure is simpler, and the manufacturing cost is lower.

On the basis of the above scheme, the short-circuit resisting coil of the present invention is provided with a step paperboard 3 on the inner side surface of the inner coil 1, as shown in fig. 2A, which is an axial structure diagram of the step paperboard 3; the thickness of the stepped paperboard 3 gradually decreases from the middle to both sides. The ladder paper board 3 is in contact with the inner side wall of the inner coil 1, the inner side face of the ladder paper board 3 is used for being in contact with the iron core, and one side of the ladder paper board 3 in contact with the iron core is a plane; the step paper plate 3 is positioned between the iron core and the inner coil 1, and the gap between the iron core and the inner coil 1 is filled, so that the inner coil 1 and the outer coil 2 are further supported. The lateral surface of ladder cardboard 3 and the contact of inlayer coil 1, the lateral surface of ladder cardboard 3 is the stairstepping, and thick both sides are thin in the middle, and ladder cardboard 3 laminates with the inner wall of inlayer coil 1 each other.

Preferably, the utility model discloses the minor axis limit of well inlayer coil 1 and outer coil 2 is binded fixedly through long axis bandage 4, and long axis bandage 4 also is the bandage that length direction generally extends along the major axis, through the fixed of long axis bandage 4, makes inlayer coil 1 and outer coil 2 relatively fixed, has the trend of inside protrusion during inlayer coil 1 short circuit, has the trend of outside protrusion during outer coil 2 short circuit, and the deformation direction of inlayer coil 1 and outer coil 2 is opposite; with inlayer coil 1 and outer coil 2 relatively fixed, the effort direction that produces is opposite when inlayer coil 1 and outer coil 2 warp, and long axis bandage 4 bears the deformation effort, makes the deformation of inlayer coil 1 and outer coil 2 offset each other, guarantees the original shape of inlayer coil 1 and outer coil 2, improves the bending resistance of inlayer coil 1 and outer coil 2 through this exterior structure of long axis bandage 4.

The long-axis binding band 4 binds and fixes the step paper board 3, and the step paper board 3 is relatively fixed with the inner coil 1 and the outer coil 2 through the long-axis binding band 3, as shown in fig. 2B, the long-axis binding band 4 is at least provided with two bands, and the two ends of the step paper board 3 are respectively fixed.

The long axis sides of the inner coil 1 and the outer coil 2 are bound and fixed through a short axis binding band 5, the short axis binding band 5, namely the binding band with the length direction along the short axis, is wound on the long axis side, and the short axis binding band 5 plays the same role as the long axis binding band 4.

As shown in fig. 3A and 3B, an axonometric view and a front view, respectively, of three coil groups combined with each other; the long shaft sides of two adjacent coil groups which are contacted with each other are bound and fixed through a short shaft binding belt 5; an inner coil 1 and an outer coil 2 form a coil group, a plurality of coil groups are arranged in the transformer, and the coil groups are relatively fixed through a short-shaft binding band 5; the short-shaft binding band 5 has a larger coverage area, has a better anti-deformation effect, and further improves the bending resistance.

As shown in fig. 2B, the long axis binding bands 4 are at least provided in two sets, and the long axis binding bands 4 are arranged in an inclined symmetrical manner, and because the long axis sides of the inner coil 1 and the outer coil 2 are arched, the distance between the inner ends of the two long axis binding bands 4 is small, and the distance between the outer ends thereof is large, and the two sets of long axis binding bands 4 arranged in an inclined manner can be more stably fixed.

Preferably, the long axis bandage 4 and the short axis bandage 5 in the present invention are half-dry glass fiber adhesive tapes, which are not easily stretched, and have better tensile properties.

The utility model also provides an oil-immersed metallic glass transformer, including foretell anti short circuit coil, prior art is referred to other parts of this transformer, the utility model discloses no longer describe here.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The short circuit resisting coil is characterized by comprising an inner coil (1) and an outer coil (2), wherein all layers of the inner coil (1) and all layers of the outer coil (2) are respectively bonded and filled with full adhesive paper;

the short axis sides of the inner coil (1) and the outer coil (2) are outwards protruded to form an arch.

2. Short-circuit resistant coil according to claim 1, characterized in that the inner side of the inner coil (1) is provided with a step paperboard (3), the thickness of the step paperboard (3) gradually decreasing from the middle to both sides.

3. The short-circuit resistant coil according to claim 2, wherein the short-axis edges of the inner coil (1) and the outer coil (2) are bound and fixed by a long-axis strap (4), and the long-axis strap (4) is bound and fixed with the step paperboard (3);

the long axis sides of the inner layer coil (1) and the outer layer coil (2) are bound and fixed through a short axis binding belt (5).

4. The short-circuit resistant coil according to claim 3, wherein the long-axis sides of two adjacent coil groups contacting each other are bound and fixed by the short-axis binding band (5).

5. Short-circuit resistant coil according to claim 3, characterized in that the long-axis straps (4) are provided in at least two groups, the long-axis straps (4) being arranged in an oblique symmetry.

6. Short-circuit resistant coil according to claim 3, characterized in that the long-axis strap (4) and the short-axis strap (5) are semi-dry cellosilk adhesive tapes.

7. An oil-immersed amorphous alloy transformer, characterized by comprising the short-circuit resistant coil of any one of claims 1 to 6.