CN115810485A - Manufacturing process of double-spiral coil outlet - Google Patents

Abstract

The invention belongs to the technical field of transformer manufacturing, and particularly relates to a manufacturing process of a double-spiral coil outlet, which comprises the following steps: s1: bending the head outlet section of the spiral transformer coil according to a preset bending position; s2: the bent part is wrapped by an insulating material; s3: arranging the head sections of a plurality of strands of coils which are wrapped well, wherein the bent parts are overlapped towards the winding part, and the bent parts and the end surfaces of the head sections are arranged in parallel in a staggered mode. The invention can improve the arrangement structure of the coil end outlet of the spiral transformer and reduce the short circuit condition of the transformer.

Description

Manufacturing process of double-spiral coil outlet

Technical Field

The invention belongs to the technical field of transformer manufacturing, and particularly relates to a manufacturing process of a double-spiral coil outlet.

Background

The transformer has different structural forms along with the size of the winding capacity and the voltage, and comprises a cylindrical transformer, a sectional transformer, a continuous transformer, a double-pancake transformer, a knotted transformer, a spiral transformer and the like, wherein the spiral transformer is a low-voltage and high-capacity transformer using a spiral winding, the current of the transformer is high, and the number of turns of the winding is small; the output of the spiral transformer is in the range of 0.23-15 kV, and is different from 160-1000 kVA, and the cross section area of the strip is not less than 75-100 mm square in order to ensure enough mechanical strength; the spiral winding adopts spiral coils, each wire turn of the spiral coils is wound into a spiral shape by a plurality of parallel flat wires, and the winding method of the spiral coils is divided into a single spiral, a double spiral, a quadruple spiral and more.

In the running process of the transformer, when short circuit occurs, the short circuit electrodynamic force is divided into axial force, radial force and tangential force, the tangential force and axial current component are related to a radial leakage magnetic field, the radial leakage magnetic field is generated by the axial current component, bending of end leakage flux and unbalanced ampere-turn distribution, and the radial leakage magnetic field is mainly caused by bending of a winding end (leading-out) magnetic field and unbalanced ampere-turn distribution because the axial current component has small influence on the radial leakage magnetic field. There is therefore a need for improvements to the ampere-turn and out-of-turn handling of the coil.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a manufacturing process of double-spiral coil leading-out ends, improve the arrangement structure of the leading-out ends at the coil end part of a spiral transformer and reduce the short-circuit condition of the transformer.

The basic scheme provided by the invention is as follows: a manufacturing process of a double-spiral coil head comprises the following steps:

s1: bending the head outlet section of the spiral transformer coil according to a preset bending position;

s2: wrapping the bent part with an insulating material;

s3: arranging the head sections of the plurality of strands of coils which are well wrapped, wherein the bent parts are overlapped towards the winding part, and the bent parts and the end surfaces of the head sections are arranged in a staggered and parallel mode.

Further, the S1 includes:

s1-1: selecting the same preset bending part at the head-out sections of a plurality of strands of coils of the spiral transformer;

s1-2: bending the preset bending part by using a bending tool at 90 ℃.

Further, the step S2 includes:

s2-1: wrapping the coil winding along the preset bending position by using an insulating material according to the preset wrapping length and the preset wrapping thickness; the insulating material is crepe paper.

Further, the preset binding length is 30-40mm.

Furthermore, the preset binding thickness is two layers of half-folded crepe paper.

Further, the S3 further includes:

s3-1: binding the lower parts of the bending parts of the strand coils staggered in the middle by using glue dispensing paper;

s3-2: the contraction band is sleeved at the bending part of the plurality of strands of coils and the parallel arrangement part staggered towards the end part of the head-out section.

Furthermore, the adhesive tape dispensing paper is L-shaped, and the width of the adhesive tape dispensing paper is larger than that of the bent part of the coil.

The principle and the advantages of the invention are as follows: need go out the head and buckle the processing after coil winding accomplishes in spiral transformer, can get rid of like this and arouse the change of going out the head position because of the rotation of coil, present play head is buckled and is overlapped for going out the head with many coil windings after buckling, carries out the ligature again, so can make the radial arch that the winding goes out the head can occupy main air channel position, and is great to the influence in radial leakage magnetic field, causes the short circuit phenomenon easily.

Therefore, a spiral transformer coil goes out arrangement structure of head in this application, be applicable to the mode that stranded coil wound, set up the kink at the play head section of coil, the kink is horizontal part one to one side of coil winding, tip one side of play head section is horizontal part two, then use crepe paper to the kink to wrap up, the prevention coil appears discharging and insulating breakdown phenomenon that the film damage leads to because of buckling and takes place, draw together stranded coil afterwards, the horizontal part of stranded coil is overlapped and is placed, the kink and the horizontal part two parallel arrangement that staggers of stranded coil, and the gap that kink and horizontal part two parallel that staggers again uses adhesive paper to paste, use the shrink tape to wrap up the department at the kink and the crepe paper of coil winding play head at last, can realize the ligature, tighten up and fixed effect.

Therefore, the present application has the advantages that: through foretell structure of arranging, can reduce the radial protruding height of stranded coil and round trip out the head, can satisfy transformer coil performance on the one hand for the short circuit can not appear in the head, and on the other hand also can not exert an influence to the judgement of transposition department when the winding to the coil.

Drawings

FIG. 1 is a block flow diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a double helix coil structure according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the arrangement of two strands of double helix structures in an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating spreading of dispensing paper during a coil bending process according to an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

the reference numbers in the drawings of the specification include: coil 1, kink 2, shrink area 3, adhesive deposite paper 4.

The embodiment is basically as shown in figures 1 and 2: a manufacturing process of a double-spiral coil head comprises the following steps:

s1: bending the head section of the spiral transformer coil 1 according to a preset bending position;

wherein, S1 includes:

s1-1: selecting the same preset bending position at the head-out sections of a plurality of strand coils 1 of the spiral transformer;

s1-2: bending the preset bent part by using a loop tool at 90 ℃ to form a bent part 2.

In the present embodiment, because the winding manner of the coil 1 in the spiral transformer is a spiral winding, the spiral winding adopts the spiral coil 1, each turn of the spiral coil 1 is formed by winding a plurality of parallel flat wires into a spiral shape, including a single spiral, a double spiral, a quadruple spiral and more, and the spiral winding of the spiral transformer in the present embodiment adopts the double spiral coil 1.

The double-spiral coil 1 needs to be subjected to head-out treatment after the winding is completed, the head-out treatment at present is to bend the head-out section, the head-out section is overlapped and placed after bending, and is bound and fixed through the contraction band 3, the overlapping mode is to occupy the radial position of the main empty channel of the transformer, the influence on a radial leakage magnetic field is large, and the short circuit phenomenon is easily caused, because the main empty channel is fully called as the main leakage magnetic empty channel, the main leakage magnetic empty channel represents the insulation distance between the high-voltage winding and the low-voltage winding and plays a role in heat dissipation, the radial protrusion height can be increased when the multi-strand coil 1 is subjected to the head-out section treatment and overlapped placement, namely the possibility of occupying the main empty channel can be realized, therefore, when the bending treatment is performed, the preset bending treatment is performed by a bending tool, in the embodiment, the preset bending position is set to be the corresponding electromagnetic wire width from the head-out section of the coil 1, the bending tool rotating by 90 degrees is adopted, and the bending tool can be bent at an angle of 90 ℃.

On the premise of the step S1, the method further includes step S2: the bending part 2 is wrapped by an insulating material;

wherein, S2 also comprises S2-1: wrapping the coil 1 in the winding direction along a preset bending position by using an insulating material according to a preset wrapping length and a preset wrapping thickness; the insulating material is crepe paper.

In this embodiment, 1 coil of spiral transformer goes out the first section when bending the processing, can lead to the fact certain damage to the film on 1 surface of coil, and the damage can lead to coil 1 to appear magnetic leakage, electric leakage scheduling problem, consequently need use insulating material to carry out the ligature, and wherein the predetermined length of wrapping and the thickness of wrapping are: when the high-voltage coil is matched with a 10 kV-level high-voltage coil, the wrapped insulating thickness is two layers of half-overlapped crepe paper, namely the thickness of the two layers of half-overlapped crepe paper;

the paper is wrapped with crepe paper 3mm at the head end and the tail end of the paper in a high-pressure fit with a 35kV level, the wrapping length is guaranteed to be 40mm, and the taper with the length of 20mm needs to be additionally wrapped.

S3: arranging the head sections of the plurality of strands of wrapped coils 1, wherein the bent parts 2 are partially overlapped towards the winding, and the bent parts 2 and the end parts facing the head sections are arranged in parallel in a staggered manner;

wherein S3 comprises S3-1: binding the lower parts of the bending parts of the strand coils 1 staggered in the middle by using glue dispensing paper 4;

s3-2: the contraction band 3 is sleeved at the bending positions of the strands of coils 1 and the positions which are staggered and parallel to the end surface of the head section.

As shown in fig. 3 and 4, in this embodiment, the bending process of the head section of the coil 1 of the conventional spiral transformer is improved by overlapping, the bending portion 2 of the head section is overlapped toward the coil 1 in the winding direction, so as to avoid the influence on the displacement in the winding process of the coil 1, the bending portion 2 and the end portion of the head section are arranged in parallel in a staggered manner, and the contraction band 3 is used for binding, tightening and fixing in the staggered parallel arrangement, so that the arrangement structure of the head section of the coil 1 is in a tightened and parallel state, thereby reducing the height of the radial protrusion of the head section, and simultaneously, the head section of each strand of coil 1 is bound by the adhesive tape 4, specifically, if there is stranded double helix coil 1, the band wire with per share double helix coil 1 uses some adhesive tape 4 to ligature, some adhesive tape 4 is the L type in this embodiment, and the width size of some adhesive tape 4 is greater than the width size of per share double helix coil 1, and use some adhesive tape 4 to carry out the magnetic leakage phenomenon that the ligature can prevent between per share double helix coil 1, on the same hand, to the single spiral, four spirals reach above, all need carry out some adhesive tape 4 ligatures to per share spiral coil 1, 4 ligature backs are accomplished to some adhesive tape, place stranded double helix coil 1 side by side, make department of buckling to a section terminal surface department be staggered parallel arrangement, use shrink 3 covers of shrink area to establish and carry out the ligature in the department of buckling, fix and tighten up, finally make spiral coil 1 go out the shaping of the structure of arranging of head.

The foregoing are merely exemplary embodiments of the present invention, and no attempt is made to show structural details of the invention in more detail than is necessary for the fundamental understanding of the art, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice with the teachings of the invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (7)

1. A manufacturing process of a double-spiral coil head is characterized in that: the method comprises the following steps:

s1: bending the head outlet section of the spiral transformer coil according to a preset bending position;

s2: wrapping the bent part with an insulating material;

s3: arranging the head sections of the plurality of strands of coils which are well wrapped, wherein the bent parts are overlapped towards the winding part, and the bent parts and the end surfaces of the head sections are arranged in a staggered and parallel mode.

2. The manufacturing process of the double-spiral coil end of claim 1, characterized in that: the S1 comprises:

s1-1: selecting the same preset bending part at the head-out sections of a plurality of strands of coils of the spiral transformer;

s1-2: bending the preset bending part by using a bending tool at 90 ℃.

3. The manufacturing process of the double-spiral coil extrusion head according to claim 2, characterized in that: the S2 comprises the following steps:

s2-1: wrapping the coil winding along the preset bending position by using an insulating material according to the preset wrapping length and the preset wrapping thickness; the insulating material is crepe paper.

4. The manufacturing process of the double-spiral coil extrusion head according to claim 3, characterized in that: the preset binding length is 30-40mm.

5. The manufacturing process of the double-spiral coil extrusion head according to claim 4, characterized in that: the preset binding thickness is two layers of half-overlapped crepe paper.

6. The manufacturing process of the double-spiral coil extrusion head according to claim 5, characterized in that: the S3 further comprises:

s3-1: binding the lower parts of the bending parts of the strand coils staggered in the middle by using adhesive tape dispensing paper;

s3-2: the contraction band is sleeved at the bending part of the plurality of strands of coils and the parallel arrangement part staggered towards the end part of the head-out section.

7. The manufacturing process of the double-spiral coil end of claim 6, characterized in that: the adhesive dispensing paper is L-shaped, and the width dimension of the adhesive dispensing paper is larger than that of the bent part of the coil.

Images