CN217740317U - Inner winding structure of 110kV transformer - Google Patents
Inner winding structure of 110kV transformer Download PDFInfo
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- CN217740317U CN217740317U CN202221569569.6U CN202221569569U CN217740317U CN 217740317 U CN217740317 U CN 217740317U CN 202221569569 U CN202221569569 U CN 202221569569U CN 217740317 U CN217740317 U CN 217740317U
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Abstract
The novel structure of the winding in the 110kV transformer mainly comprises a lead, a stay and an end ring; the winding is cylindrical; the winding comprises a high-voltage winding and a low-voltage winding, the low-voltage winding is sleeved on the iron core, the high-voltage winding is sleeved on the outer side of the low-voltage winding, and the high-voltage winding and the low-voltage winding are arranged in the transformer box; in the low-voltage winding, the wire winding is divided into four layers of coils, the four layers of coils are sleeved together from inside to outside, the number of turns of each layer is the same and communicated, the number of turns of the winding is equally divided into four parts by a layered structure, each layer is formed by winding three wires side by side, and the three wires are spaced and arranged in a rising layer mode, so that the axial height of the coil is reduced, and a wire transposition's' bending structure is avoided. The beneficial effects of the utility model are that, stability is strong, and the coiling is convenient, and the radiating effect is good, is fit for being used for the design and the preparation of 110kV transformer inner winding, can reduce transformer manufacturing cost to guarantee the temperature rise level of winding and the whole quality of transformer.
Description
Technical Field
The utility model belongs to transformer winding coiling technique relates to a winding structure in 110kV transformer.
Background
Along with the continuous development of economy, the call for energy conservation and consumption reduction is larger and larger, the performance requirement of a national power grid on a transformer is higher and higher, the newly-proposed energy efficiency grade has higher requirements on air load loss and load loss, the transformer must adopt more copper wires and silicon steel sheets, and along with the rapid price rise of the copper wires and the silicon steel sheets, the cost of the transformer is also the height of a water rising ship, so that various manufacturers are very puzzled.
Meanwhile, the existing transformer adopts a continuous structure winding, and the rising position has S-shaped bending position in the winding process, so that the operation is complex and laborious, and the stability is insufficient, thereby needing improvement.
The existing insulating end ring is a smooth and tidy circular ring, no notch is formed in the coil outlet, the coil outlet cannot be firmly and accurately fixed at a specified position, and therefore the coil cannot be accurately divided into a plurality of gears, and improvement is needed.
The existing transformer has poor heat dissipation performance.
Disclosure of Invention
The utility model discloses a remedy prior art not enough, provide a novel structure of 110kV transformer inner winding of simple structure, convenient operation, saving raw and other materials.
The utility model discloses a realize through following technical scheme:
a110 kV transformer inner winding structure is characterized in that: the winding is cylindrical; the winding comprises a high-voltage winding and a low-voltage winding, the low-voltage winding is sleeved on the iron core, the high-voltage winding is sleeved on the outer side of the low-voltage winding, and the high-voltage winding and the low-voltage winding are arranged in the transformer box; the high-voltage winding and the low-voltage winding are arranged in a layered mode, the low-voltage winding is sequentially sleeved from inside to outside by a plurality of low-voltage coils, the low-voltage coils are connected in series, the high-voltage winding is sequentially sleeved from inside to outside by a plurality of high-voltage coils, and the high-voltage coils are connected in series;
in the low-voltage winding, the wire winding is divided into four layers of coils, the four layers of coils are sleeved together from inside to outside, the number of turns of each layer is the same and communicated, the number of turns of the winding is equally divided into four parts by a layered structure, each layer is formed by winding three wires side by side, and the three wires are spaced and arranged in a rising layer mode, so that the axial height of the coil is reduced, and a wire transposition's' bending structure is avoided.
The upper clamping pieces are installed on the front side and the rear side of the upper iron yoke of the iron core, the lower clamping pieces are installed on the front side and the rear side of the lower iron yoke of the iron core, the front upper clamping pieces and the rear upper clamping pieces are fixed together through bolts, the front lower clamping pieces and the rear lower clamping pieces are fixed together through bolts, a base is fixed to the bottom of the lower clamping pieces, and the base is fixed to the bottom of a transformer box body through bolts.
The adjacent two layers of coils are supported and fixed at intervals through a large number of vertical supporting strips, gaps are reserved between every two adjacent supporting strips, and oil ducts are formed and used for containing insulating oil, so that the temperature rise of the transformer is reduced.
Insulating end rings are arranged at the upper end and the lower end of each layer of coils and are used for compressing the coils and insulating the coils; the end face of the insulating end ring, which is contacted with the coil, is provided with three inclined grooves, triangular flanges are arranged on the inner sides of the inclined grooves, and the inclined directions of the inclined grooves are consistent, so that the three leads of each layer of winding turn outwards; the inclined groove of the insulating end ring is in a corner shape, so that the outgoing line direction of the winding wire is along the radius direction.
The innermost layer of coil is wound on the outer circle of the insulating hard paper cylinder, a large number of vertical supporting strips are clamped between the hard paper cylinder and the coil, and an oil passage is formed by a gap between every two adjacent supporting strips; and a plurality of vertical outer supporting strips are arranged on the outer side of the layer of coil on the outermost side, and a binding belt is used for winding a plurality of circles on the outer sides of the coil and the outer supporting strips so as to firmly bind the coil.
The upper end of an insulating end ring at the upper end of each coil is tightly pressed and fixed by an upper insulating cushion block, and the upper end of the upper insulating cushion block is tightly pressed by an upper clamping piece of the iron core; the lower end of the insulating end ring at the lower end of each winding is supported and fixed by a lower insulating cushion block, and the lower end of the lower insulating cushion block is tightly propped by a lower clamping piece of the iron core.
The beneficial effects of the utility model are that, stability is strong, and the coiling is convenient, and the radiating effect is good, is fit for being used for the design and the preparation of 110kV transformer inner winding, can reduce transformer manufacturing cost to guarantee the temperature rise level of winding and the whole quality of transformer.
Through adopting the transformer inner winding of this structure, because saved the transformer inner winding space, reduced the use of copper and silicon steel sheet, because heat dispersion is good moreover, can reduce the specification of radiator or reduce the group number, reduced transformer cost to a very big extent, and can not produce any influence to the security performance, along with the reduction of temperature rise on the contrary, improved the running life of transformer.
The winding layer type structure equally divides the number of turns of a winding into four parts, the winding layer is spirally raised, each layer is formed by winding three wires side by side, and the three wires are raised at intervals, so that the axial height of the coil is reduced, and an s-shaped bending structure of wire transposition is avoided.
The novel structure of the transformer inner winding comprises a lead, a stay, an end ring and the like. Taking fig. 2 as an example, three wires are parallelly wound, and when the layer 1 and the layer 2 are in transition, the three wires are respectively and uniformly arranged at three gears at intervals of ascending, so that the axial height of the coil is reduced, and meanwhile, the ascending is stable and high in mechanical strength. Compared with the prior design figure 1, the space of the axial oil passage is saved, and the operation of wire transposition's' bending is avoided. The advantages are obvious and the operation is simple.
According to the novel structure of the transformer inner winding, the wire winding is divided into four layers, the number of turns of each layer is the same, the layers are communicated with each other, the layers are supported and fixed through supporting strips, and the layer ends are lifted and compacted through end rings. The space of windings in the transformer can be saved, the cost of the transformer is reduced, and meanwhile, the interlayer supporting strips play a good role in reducing the temperature rise of the transformer, so that the economical efficiency of the transformer design is greatly improved.
According to the novel structure of the inner winding of the transformer, the number of turns of the winding is equally divided into four parts by the layered structure, the spiral layer lifting is simple and convenient, the winding is simple, a plurality of links such as's' bending position change in the winding process of the transformer winding in the past continuous structure are reduced, the working efficiency is improved, and the stability is enhanced.
Drawings
The attached drawing is a schematic structural diagram of the utility model;
fig. 1 is a structure of a conventional winding (a continuous winding development diagram);
fig. 2 is a development view of the layered winding of the present invention, layer 1;
fig. 3 is a development view of the layered winding of the present invention, layer 2;
fig. 4 and 5 are a bottom view and a front view of the winding end ring of the present invention in sequence;
fig. 6 is a half (right half) of a cross-sectional view of a low-voltage winding shaft according to the present invention;
fig. 7 is a half (right half) of a left side view of the transformer of the present invention.
In the figure, an outer stay 1, an iron core column 2, a low-voltage winding 3, a high-voltage winding 4, a hard paper tube 5, an upper iron yoke 6, an upper clamping piece 7, a lower iron yoke 8, a lower clamping piece 9, a base 10, a flange 11, an upper insulating cushion block 12, a lower insulating cushion block 13, an insulating end ring 14, a stay 15, an inclined groove 16 and an outlet 17 of a winding wire.
Detailed Description
The attached drawing is an embodiment of the utility model.
In the winding structure in the transformer of the utility model, the winding is cylindrical; the winding comprises a high-voltage winding 4 and a low-voltage winding 3, the low-voltage winding is sleeved on the iron core column 2, the high-voltage winding is sleeved on the outer side of the low-voltage winding, and the high-voltage winding and the low-voltage winding are arranged in a transformer box body; the high-voltage winding and the low-voltage winding are arranged in a layered mode, the low-voltage winding is sequentially sleeved from inside to outside by a plurality of low-voltage coils, the low-voltage coils are connected in series, the high-voltage winding is sequentially sleeved from inside to outside by a plurality of high-voltage coils, and the high-voltage coils are connected in series;
in the low-voltage winding, the wires are wound into four layers of coils, the four layers of coils are sleeved together from inside to outside, the number of turns of each layer is the same and communicated, the number of turns of the winding is equally divided into four parts by a layered structure, each layer is formed by winding three wires side by side, and the three wires are alternately layered, so that the axial height of the coil is reduced, and a wire transposition's' bending structure is avoided.
The front and back sides of an upper iron yoke 6 of the iron core are provided with upper clamping pieces 7, the front and back sides of a lower iron yoke 8 of the iron core are provided with lower clamping pieces 9, the front and back upper clamping pieces are fixed together through bolts, the front and back lower clamping pieces are fixed together through bolts, the bottom of the lower clamping piece is fixed with a base 10, and the base is fixed at the bottom of the transformer box body through bolts.
The adjacent two-layer coil is fixed through a large amount of vertical stays 15, a gap is reserved between every two adjacent stays, an oil duct is formed and used for containing insulating oil, and therefore temperature rise of the transformer is reduced.
The upper end and the lower end of each layer of coils are provided with insulating end rings 14 for compressing the coils and insulating; the end face of the insulating end ring, which is contacted with the coil, is provided with three inclined grooves 16, triangular flanges 11 are arranged on the inner sides of the inclined grooves, and the inclined directions of the inclined grooves are consistent, so that three leads of each layer of winding are bent outwards; the skewed slot of the insulating end ring is in a corner shape, so that the outlet 17 direction of the winding wire is along the radius direction.
The innermost layer of coil is wound on the outer circle of the insulating hard paper cylinder 5, a large number of vertical supporting strips 15 are clamped between the hard paper cylinder and the coil, and an oil passage is formed by a gap between every two adjacent supporting strips; and a plurality of vertical outer supporting strips 1 are arranged on the outer side of the layer of coil on the outermost side, and a plurality of circles are wound on the outer sides of the coil and the outer supporting strips by using a binding belt so as to firmly bind the coil.
The upper end of an insulating end ring 14 at the upper end of each coil is tightly pressed and fixed by an upper insulating cushion block 12, and the upper end of the upper insulating cushion block is tightly pressed by an upper clamping piece 7 of the iron core; the lower end of the insulating end ring at the lower end of each winding is supported and fixed by a lower insulating cushion block 13, and the lower end of the lower insulating cushion block is tightly propped by a lower clamping piece 9 of the iron core.
The high-voltage winding is similar to the low-voltage winding in structure, and the number of layers is more than that of the low-voltage winding.
The first outgoing line of the low-voltage coil is xyz, and the tail outgoing line of the low-voltage coil is abc.
Claims (6)
1. A110 kV transformer inner winding structure is provided, wherein a winding is cylindrical; the winding comprises a high-voltage winding and a low-voltage winding, the low-voltage winding is sleeved on the iron core, the high-voltage winding is sleeved on the outer side of the low-voltage winding, and the high-voltage winding and the low-voltage winding are arranged in the transformer box; the method is characterized in that: the high-voltage winding and the low-voltage winding are arranged in a layered mode, the low-voltage winding is formed by sequentially sleeving a plurality of low-voltage coils from inside to outside, the low-voltage coils are connected in series, the high-voltage winding is formed by sequentially sleeving a plurality of high-voltage coils from inside to outside, and the high-voltage coils are connected in series;
in the low-voltage winding, the conducting wires are wound into four layers of coils, the four layers of coils are sleeved together from inside to outside, the turns of each layer are the same and communicated, the turns of the winding are equally divided into four parts by a layered structure, each layer is spirally raised, each layer is formed by winding three conducting wires side by side, and the three conducting wires are raised at intervals;
and a large number of vertical supporting strips are used for supporting and fixing the adjacent two layers of coils at intervals.
2. The internal winding structure of the 110kV transformer as claimed in claim 1, wherein: a gap is reserved between every two adjacent supporting strips, and an oil duct is formed and used for containing insulating oil, so that the temperature rise of the transformer is reduced;
the innermost layer of coil is wound on the outer circle of the insulating hard paper cylinder, a large number of vertical supporting strips are clamped between the hard paper cylinder and the coil, and an oil passage is formed by a gap between every two adjacent supporting strips.
3. The internal winding structure of the 110kV transformer according to claim 1 or 2, characterized in that: insulating end rings are arranged at the upper end and the lower end of each layer of coils and are used for compressing the coils and insulating the coils; the end face of the insulating end ring, which is contacted with the coil, is provided with three inclined grooves, triangular flanges are arranged on the inner sides of the inclined grooves, the inclined directions of the inclined grooves are consistent, and the three wires of each layer of winding are used for turning outwards and are uniformly arranged at three gears at intervals in ascending layers; the inclined groove of the insulating end ring is in a corner shape, so that the outgoing line direction of the winding wire is along the radius direction.
4. The internal winding structure of a 110kV transformer as claimed in claim 1 or 2, wherein: and a plurality of vertical outer supporting strips are arranged on the outer side of the layer of coil on the outermost side, and a binding belt is used for winding a plurality of circles on the outer sides of the coil and the outer supporting strips so as to firmly bind the coil.
5. The internal winding structure of a 110kV transformer as claimed in claim 1 or 2, wherein: the upper end of an insulating end ring at the upper end of each coil is tightly pressed and fixed by an upper insulating cushion block, and the upper end of the upper insulating cushion block is tightly pressed by an upper clamping piece of the iron core; the lower end of the insulating end ring at the lower end of each winding is supported and fixed by a lower insulating cushion block, and the lower end of the lower insulating cushion block is tightly propped by a lower clamping piece of the iron core.
6. The internal winding structure of a 110kV transformer as claimed in claim 1 or 2, wherein: the upper clamping pieces are installed on the front side and the rear side of the upper iron yoke of the iron core, the lower clamping pieces are installed on the front side and the rear side of the lower iron yoke of the iron core, the front upper clamping pieces and the rear upper clamping pieces are fixed together through bolts, the front lower clamping pieces and the rear lower clamping pieces are fixed together through bolts, a base is fixed to the bottom of the lower clamping pieces, and the base is fixed to the bottom of a transformer box body through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221569569.6U CN217740317U (en) | 2022-06-22 | 2022-06-22 | Inner winding structure of 110kV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221569569.6U CN217740317U (en) | 2022-06-22 | 2022-06-22 | Inner winding structure of 110kV transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217740317U true CN217740317U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221569569.6U Active CN217740317U (en) | 2022-06-22 | 2022-06-22 | Inner winding structure of 110kV transformer |
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| Country | Link |
|---|---|
| CN (1) | CN217740317U (en) |
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2022
- 2022-06-22 CN CN202221569569.6U patent/CN217740317U/en active Active
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