CN220491713U

CN220491713U - Novel transformer low-voltage coil winding structure

Info

Publication number: CN220491713U
Application number: CN202322220428.4U
Authority: CN
Inventors: 王�锋; 葛臣; 温慧玲; 杨波; 刘德凤; 刘曙光
Original assignee: Shandong Linglong Electromechanical Co Ltd
Current assignee: Shandong Linglong Electromechanical Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-02-13
Anticipated expiration: 2033-08-17

Abstract

The utility model discloses a novel winding structure of a low-voltage coil of a transformer, which relates to the technical field of low-voltage coils of transformers. According to the novel transformer core transposition structure, the coil is enabled to be reduced in the height of one turn of wire on the axial height through the latest transposition structure, the overall height of the coil is reduced, the height of a transformer core and the height of an oil tank are further reduced overall, raw materials of the transformer are saved, only one transposition is carried out through the overall coil, hidden danger of a coil transposition position is reduced, the coil is enabled to be smoother overall, the quality is more reliable, the shock resistance and the short circuit resistance are better, the outer diameter size control of the coil is facilitated through the structure of the half oil duct and the insulating paper, and the radial position of the novel transposition structure transposition is carried out on a straight line part, so that the flatness of the coil is better.

Description

Novel transformer low-voltage coil winding structure

Technical Field

The utility model relates to the technical field of low-voltage coils of transformers, in particular to a novel winding structure of a low-voltage coil of a transformer.

Background

At present, the low-voltage coils of the oil-immersed transformer all adopt a structure that each layer of the low-voltage coils needs one standard transposition, namely, two standard transposition needs to be carried out, the axial height of the coils is increased by transposition, and hidden danger of the coils is increased at the transposition position; the head and the tail are combined, which is not beneficial to the lead wire of the body; the radial height of the coil is increased when the position is changed, and the control of the outer diameter size of the coil is greatly influenced.

Based on the above, a novel transformer low-voltage coil winding structure is provided, so that the defects of the existing device can be overcome.

Disclosure of Invention

The utility model aims to provide a novel transformer low-voltage coil winding structure so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a novel transformer low-voltage coil winding structure, includes the wire winding mould, the outside surface winding one deck cardboard of wire winding mould, the outside of cardboard is by a radial wire winding coil, coil first layer coiling total turn (N-1)/2, the last 3 turns of first layer carry out the transposition layer that rises, adopt low pressure curtain formula oil duct between the layer, an axial wire runs through low pressure curtain formula oil duct and carries out the layer that rises, the last radial wire of layer that rises carries out the coil winding again, coil second floor coiling turns is (N-1)/2+1, the both ends winding of coil has insulating end circle, the coil outside is carried out the ligature by the strap and is fixed.

Preferably, the coil is transposed and layered at the linear position of the winding former.

Preferably, the linear part between the coil layers adopts a structure of low-voltage curtain type oil duct and interlayer insulating paper, the linear part adopts point glue type interlayer insulating paper, and the arc part adopts a half curtain type oil duct structure.

Preferably, the coil interlayer transposition adopts a structure that one layer of standard transposition is performed at a time and one layer of non-transposition is performed.

Preferably, the starting and the ending of the wire of the coil are staggered when the wire is started, and the wire is insulated by using crepe paper.

Preferably, the outer surface of the coil is half-lapped by a white cloth belt.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the method, the coil can be reduced in axial height by adopting a method that one layer is subjected to standard transposition and one layer is not subjected to transposition, so that the overall height of the coil is directly reduced, the height of a transformer core and the height of an oil tank are further reduced integrally, and the raw materials of the transformer are greatly saved.

2. According to the method, the whole coil is subjected to transposition once, and under the condition of considering the circulation loss of the coil, the hidden danger of the transposition position of the coil is reduced, so that the coil is smoother on the whole, more reliable in quality and better in shock resistance and short circuit resistance.

3. According to the structure of the insulating paper is added to the half oil duct, the interlayer insulating adhesive dispensing paper is adopted to the linear part, the half curtain type oil duct structure is adopted to the arc line part, the lap joint of the linear part is reduced, the outer diameter size control of the coil is facilitated, and the flatness of the coil can be better due to the fact that the radial position of the new transposition structure is carried out on the linear part.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a top view of the present utility model.

Reference numerals annotate: paperboard 1, a wire 2, a low-voltage curtain type oil duct 3, an insulating end ring 4, a white cloth belt 5, crepe paper 6, interlayer insulating paper 7 and a winding former 8.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Referring to fig. 1-3, a new transformer low-voltage coil winding structure comprises a winding die 8, a layer of paperboard 1 is wound on the outer side surface of the winding die 8, a radial wire 2 is wound on the outer side of the paperboard 1 to form a coil, the first layer of the coil is wound with (N-1)/2 of total turns, the last 3 turns of the first layer are transposed and lifted, a low-voltage curtain type oil duct 3 is adopted between layers, one axial wire 2 penetrates through the low-voltage curtain type oil duct 3 to lift the layers, the radial wire 2 is wound again after lifting the layers, the second layer of the coil is wound with (N-1)/2+1, the accuracy of the total turns is guaranteed, the two ends of the coil are wound with insulating end rings 4, and the outer side of the coil is bound and fixed by a white cloth belt 5.

Referring to fig. 2, the coil is transposed and layered at the linear position of the winding former 8, so that the coil has better flatness.

Referring to fig. 1-2, the coil layer adopts a structure of low-voltage curtain type oil duct 3 and interlayer insulating paper 7, the straight line part adopts a point glue type interlayer insulating paper 7, the arc part adopts a structure of half curtain type oil duct 3, the lap joint of the straight line part is reduced, and the outer diameter size control of the coil is facilitated.

Referring to fig. 1-2, the coil layers adopt a structure of one-time standard transposition and one-time non-transposition, so that the height of one turn of wire of the coil in the axial direction can be reduced, the overall height of the coil is directly reduced, the height of a transformer core and the height of an oil tank are further reduced, and the raw materials of the transformer are greatly saved.

Referring to fig. 1, the start and end of the coil are staggered when the start and end are separated, and are insulated by crepe paper 6, so that enough operation space is reserved for the leads of the body.

Referring to fig. 1, the outer surface of the coil is half-lapped with a white cloth belt 5.

When the coil is wound, a piece of paper board 1 is firstly added on a winding mould 8 before winding, the paper board is used as a framework of the coil, the total turns (N-1)/2 of the first layer winding coil are the transposition layers of the coil, the transposition positions of the transposition layers are 3 turns at the tail of the first layer, standard transposition is carried out once, lifting is carried out after the first layer winding, the transposition of the lead is not carried out on the coil at the layer after lifting, and the turns of the transposition layers are (N-1)/2+1; the two ends of the coil are insulated by the insulating ends 4, and are well bound and fixed by the white cloth belt 5 during winding, the outer surface of the coil is semi-overlapped by the white cloth belt 5 to form a layer, the coil wire 2 is fixed, and the winding of the low-voltage coil is completed.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a novel transformer low-voltage coil coiling structure, includes wire winding former (8), its characterized in that, wire winding former (8) outside surface winding one deck cardboard (1), the outside of cardboard (1) is by a radial wire (2) winding coil, coil first layer coiling total turn (N-1)/2, carries out transposition layer that rises at the last 3 turns of first layer, adopt low-pressure curtain formula oil duct (3) between the coil layer, run through in low-pressure curtain formula oil duct (3) and be equipped with an axial wire (2) and carry out the layer that rises, rise layer later one radial wire (2) carries out the coil winding again, coil second floor coiling is (N-1)/2+1, the both ends winding of coil has insulating end circle (4), the coil outside is fixed by white cloth tape (5) turn ligature.

2. A new transformer low-voltage coil winding structure according to claim 1, characterized in that the transposition layer of the coil is carried out at the straight position of the winding former (8).

3. The novel transformer low-voltage coil winding structure according to claim 1, wherein the linear part between the coil layers adopts a structure of low-voltage curtain type oil duct (3) and interlayer insulating paper (7), the linear part adopts a structure of point glue type interlayer insulating paper (7), and the arc part adopts a structure of half curtain type oil duct (3).

4. The novel low-voltage coil winding structure of the transformer according to claim 1, wherein the coil interlayer transposition adopts a structure of one standard transposition and one non-transposition.

5. A new winding structure of low-voltage coils of transformers according to claim 3, characterized in that the starting and ending of the wires (2) of the coils are staggered in terms of starting and ending, and are insulated by crepe paper (6).

6. A new transformer low-voltage coil winding structure according to claim 3, characterized in that the outer surface of the coil is half-lapped with a white cloth tape (5).