CN215644045U - Novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance - Google Patents
Novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance Download PDFInfo
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- CN215644045U CN215644045U CN202121323148.0U CN202121323148U CN215644045U CN 215644045 U CN215644045 U CN 215644045U CN 202121323148 U CN202121323148 U CN 202121323148U CN 215644045 U CN215644045 U CN 215644045U
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Abstract
The utility model discloses a novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance, which comprises an iron core, wherein the iron core comprises a plurality of amorphous alloy sheets, the amorphous alloy sheets, an inner pull plate and an outer pull plate are bonded into a whole through epoxy resin, the iron core is provided with a high-voltage winding and a low-voltage winding, the high-voltage winding in the high-voltage winding is of a lead segmented layer structure, the low-voltage winding in the low-voltage winding is of a foil winding structure, four sides of the high-voltage winding and the low-voltage winding are circular arcs, the upper end and the lower end of each winding are respectively provided with 4 iron yoke cushion blocks distributed with 45-degree opposite angles, an upper clamping piece is arranged above each upper iron yoke cushion block, a lower clamping piece is arranged below each lower iron yoke cushion block, two press nails are arranged on each iron yoke cushion block, the press nails are matched with the iron yoke cushion blocks to fix the windings between the upper clamping piece and the lower clamping piece, and side pressure cushion blocks are arranged at two sides of the upper clamping piece, and an iron yoke insulating cushion block is arranged between the upper end parts of the high-voltage coil and the low-voltage coil and the upper iron yoke of the amorphous alloy.
Description
Technical Field
The utility model relates to a novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance.
Background
With the increase of the investment of power grid construction, the investment of the power grid and related industries exceeds 6 trillion yuan. The transformer is one of important equipment of a power system, the loss of the transformer is reduced, a large amount of energy can be saved, and the amorphous alloy transformer is favored by larger and larger markets due to the excellent energy-saving performance that the air-load energy of the amorphous alloy transformer is 70% lower than that of a silicon steel transformer.
With the rapid development and expansion of domestic large and medium-sized cities, the ground traffic pressure is higher and higher, so that the large development of domestic urban rail transit is promoted, the urban rail transit industry is in a rapid development stage at present, dozens of lines are worked and constructed every year in China, and according to the characteristics of urban rail transit load and the requirements on transformers, the application prospect of 35 kV-grade amorphous alloy transformers in the urban rail transit industry is wide by responding to national call of 'energy conservation and emission reduction', and the great significance is achieved for reducing the loss of an urban rail transit power supply system.
The amorphous alloy sheet iron core dry-type transformer is different from an iron core supporting structure of a traditional oriented silicon steel sheet dry-type transformer in structure, and due to the fact that the amorphous alloy iron core cannot bear force due to the characteristics of the amorphous alloy iron core, a novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance.
A novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance comprises an iron core, wherein the iron core comprises a plurality of amorphous alloy sheets, an inner side pull plate is arranged in the middle of the amorphous alloy sheets, an outer side pull plate is arranged outside the amorphous alloy sheets, the inner side pull plate and the outer side pull plate are bonded into a whole through epoxy resin, a high-voltage winding and a low-voltage winding are arranged on the iron core and are formed through epoxy resin pouring technology, a high-voltage coil in the high-voltage winding is of a lead segmented layer type structure, a low-voltage coil in the low-voltage winding is of a foil winding type structure, four sides of the high-voltage coil and the low-voltage coil are both arc-shaped, 4 iron yoke cushion blocks distributed at 45-degree opposite angles are arranged at the upper end and the lower end of each coil, each iron yoke cushion block comprises an upper iron yoke cushion block and a lower iron yoke cushion block, an upper clamping piece is arranged above the upper iron yoke cushion block, and a lower clamping piece is arranged below the lower iron yoke cushion block, a pressing nail is arranged on each iron yoke cushion block, the pressing nails are matched with the iron yoke cushion blocks to fix the coil between the upper clamping piece and the lower clamping piece, and side clamping pieces and side pressure cushion blocks are arranged on two sides of the upper clamping piece.
As a further improvement, the iron yoke cushion blocks and the side pressure cushion blocks are insulating cushion blocks.
As a further improvement, the side clamping pieces and the side pressure cushion blocks are fixed through pressing nails.
As a further improvement, grooves are milled on four side surfaces of the upper iron yoke cushion block, the lower iron yoke cushion block and the side pressure cushion block.
As a further improvement, the four surfaces of the high-voltage coil and the low-voltage coil and the insulating separating cylinders connected in an arc manner are arranged between the high-voltage coil and the low-voltage coil.
As a further improvement, the upper end and the lower end of the coil are provided with insulation reinforced outer layer leads.
As a further improvement, an iron yoke insulating cushion block is arranged between the upper end parts of the high-voltage coil and the low-voltage coil and the amorphous alloy upper iron yoke cushion block.
Has the advantages that:
compared with the prior art, the technical scheme of the utility model has the advantages that the structural design concept is novel: the winding is tightly pressed between the upper clamping piece and the lower clamping piece at the upper end part and the lower end part of the coil in a mode of pressing 8 points through an iron yoke cushion block and a pressing nail; the two sides of the upper clamping piece are provided with a side clamping piece and a side pressure cushion block which are tightly pressed by a pressing nail, so that the short circuit resistance of the coil is enhanced; the high-voltage winding and the low-voltage winding adopt a special epoxy resin pouring process to enhance the structural strength and improve the short-circuit resistance; according to the analysis of short circuit stress of the high-voltage coil and the low-voltage coil, four rectangular surfaces of the high-voltage coil and the low-voltage coil are improved into arc shapes from linear shapes, so that the short circuit resistance of the coils is enhanced; the iron core is formed by bonding an amorphous alloy sheet and a pulling plate together through epoxy resin. The amorphous alloy sheet iron core dry type transformer structure is different from the iron core supporting structure of the traditional oriented silicon steel sheet dry type transformer, and the amorphous alloy cannot be stressed due to the characteristics of the amorphous alloy, so that the transformer structure is designed to be a frame structure formed by an iron core pulling plate, an upper clamping piece and a lower clamping piece for protecting the amorphous alloy sheet, and the iron core is prevented from being extruded; set up insulating yoke cushion at the coil upper end alternate, yoke insulating cushion places between last yoke cushion and coil tip, plays the effect of support coil on the one hand, and on the other hand also plays the effect of supporting the iron core. And the outer layer wires at the upper end and the lower end of the coil are reinforced in insulation, so that the electric field distribution is improved. The four sides of the upper iron yoke cushion block, the lower iron yoke cushion block and the side pressure cushion block are milled with grooves, so that the creepage distance from the coil end part to the iron yoke is prolonged, the electrical strength of a product is improved, the safety performance of the product is enhanced, and the four sides of the high-voltage coil and the low-voltage coil, the four sides of the high-voltage coil and the four sides of the low-voltage coil are all insulation separating cylinders connected in an arc manner, so that the field intensity distribution of the product is improved, and the electrical performance of the product is improved.
Compared with the prior art, the technical scheme of the utility model optimizes the product structure, improves the short-circuit resistance of the product, enhances the electrical performance of the product and reduces the noise of the product.
Drawings
FIG. 1 is a front view of a novel 35kV amorphous alloy dry-type transformer with short-circuit resistance;
FIG. 2 is a side view of a novel 35kV amorphous alloy dry-type transformer with short-circuit resistance;
FIG. 3 is a top view of a novel 35kV amorphous alloy dry-type transformer with short-circuit resistance;
1. the upper clamp 2, the lower clamp 3, the high-voltage coil 4, the low-voltage coil 5, the outer pull plate 6, the inner pull plate 7, the iron core 8, the upper iron yoke cushion block 9, the lower iron yoke cushion block 10, the side clamp 11, the press nail 12, the iron yoke insulating cushion block 13 and the side press cushion block.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1 to 3, a novel 35kV amorphous alloy dry-type transformer with short-circuit resistance comprises an upper clamp 1, a lower clamp 2, a high-voltage coil 3, a low-voltage coil 4, an outer pull plate 5, an inner pull plate 6, an iron core 7, an upper iron yoke cushion block 8, a lower iron yoke cushion block 9, a side clamp 10, a press pin 11, an iron yoke insulating cushion block 12 and a side press cushion block 13.
A novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance comprises an iron core 7, wherein the iron core 7 comprises a plurality of amorphous alloy sheets, an inner side pull plate 6 is arranged in the middle of the amorphous alloy sheets, an outer side pull plate 5 is arranged outside the amorphous alloy sheets, the inner side pull plate 6 and the outer side pull plate 5 are bonded into a whole through epoxy resin, a high-voltage winding and a low-voltage winding are arranged on the iron core 7 and are both formed through epoxy resin pouring technology, a high-voltage coil 3 in the high-voltage winding is of a lead segmented layer type structure, a low-voltage coil 4 in the low-voltage winding is of a foil winding type structure, four sides of the high-voltage coil 3 and the low-voltage coil 4 are circular arcs, an upper end and a lower end of each coil are respectively provided with 4 iron yoke cushion blocks distributed with 45-degree diagonal angles, and iron yoke insulation cushion blocks 12 are arranged between upper end portions of the high-voltage coil and the amorphous alloy upper iron yoke cushion blocks, an upper clamping piece 1 is arranged above the upper iron yoke cushion block 8, a lower clamping piece 2 is arranged below the lower iron yoke cushion block 9, a press nail 11 is arranged on each iron yoke cushion block, the press nails 11 are matched with the iron yoke cushion blocks to fix the coil between the upper clamping piece 1 and the lower clamping piece 2, and side clamping pieces 10 and side pressure cushion blocks 13 are arranged on two sides of the upper clamping piece 1.
The iron yoke insulating pad 12 and the side pressure pad 13 are insulating pads.
The side clamping piece 10 and the side pressure pad 13 are fixed by a pressing nail 11.
Wherein, the four side surfaces of the upper yoke cushion block 8, the lower yoke cushion block 9 and the side pressure cushion block 13 are milled with grooves.
Wherein, the four surfaces of the high-voltage coil 3 and the low-voltage coil 4 and the insulating separating cylinders connected by circular arcs are arranged between the high-voltage coil 3 and the low-voltage coil 4.
Wherein, the upper end and the lower extreme of coil be equipped with the outer wire of insulation reinforcement formula.
Compared with the prior art, the technical scheme of the utility model has the advantages that the structural design concept is novel: the winding is tightly pressed between the upper clamping piece and the lower clamping piece at the upper end part and the lower end part of the coil in a mode of pressing 8 points through an iron yoke cushion block and a pressing nail; the two sides of the upper clamping piece are provided with a side clamping piece and a side pressure cushion block which are tightly pressed by a pressing nail, so that the short circuit resistance of the coil is enhanced; the high-voltage winding and the low-voltage winding adopt a special epoxy resin pouring process to enhance the structural strength and improve the short-circuit resistance; according to the analysis of short circuit stress of the high-voltage coil and the low-voltage coil, four rectangular surfaces of the high-voltage coil and the low-voltage coil are improved into arc shapes from linear shapes, so that the short circuit resistance of the coils is enhanced; the iron core is formed by bonding an amorphous alloy sheet and a pulling plate together through epoxy resin. The amorphous alloy sheet iron core dry type transformer structure is different from the iron core supporting structure of the traditional oriented silicon steel sheet dry type transformer, and the amorphous alloy cannot be stressed due to the characteristics of the amorphous alloy, so that the transformer structure is designed to be a frame structure formed by an iron core pulling plate, an upper clamping piece and a lower clamping piece for protecting the amorphous alloy sheet, and the iron core is prevented from being extruded; set up insulating yoke cushion at the coil upper end alternate, yoke insulating cushion places between last yoke cushion and coil tip, plays the effect of support coil on the one hand, and on the other hand also plays the effect of supporting the iron core. And the outer layer wires at the upper end and the lower end of the coil are reinforced in insulation, so that the electric field distribution is improved. The four sides of the upper iron yoke cushion block, the lower iron yoke cushion block and the side pressure cushion block are milled with grooves, so that the creepage distance from the coil end part to the iron yoke is prolonged, the electrical strength of a product is improved, the safety performance of the product is enhanced, and the four sides of the high-voltage coil and the low-voltage coil, the four sides of the high-voltage coil and the four sides of the low-voltage coil are all insulation separating cylinders connected in an arc manner, so that the field intensity distribution of the product is improved, and the electrical performance of the product is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance is characterized by comprising an iron core, wherein the iron core comprises a plurality of amorphous alloy sheets, an inner side pull plate is arranged in the middle of the amorphous alloy sheets, an outer side pull plate is arranged outside the amorphous alloy sheets, the inner side pull plate and the outer side pull plate are bonded into a whole through epoxy resin, a high-voltage winding and a low-voltage winding are arranged on the iron core, the high-voltage winding and the low-voltage winding are both formed through epoxy resin pouring technology, a high-voltage coil in the high-voltage winding is of a lead segmented layer type structure, a low-voltage coil in the low-voltage winding is of a foil winding type structure, the four sides of the high-voltage coil and the low-voltage coil are all circular arcs, 4 iron yoke cushion blocks distributed with 45-degree opposite angles are arranged at the upper end and the lower end of each coil, each iron yoke cushion block comprises an upper iron yoke cushion block and a lower iron yoke cushion block, and a clamping piece is arranged above the upper iron yoke cushion block, and a lower clamping piece is arranged below the lower iron yoke cushion block, a pressing nail is arranged on each iron yoke cushion block, the pressing nails are matched with the iron yoke cushion blocks to fix the coil between the upper clamping piece and the lower clamping piece, and side clamping pieces and side pressure cushion blocks are arranged on two sides of the upper clamping piece.
2. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein the iron yoke spacers and the side pressure spacers are insulating spacers.
3. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein the side clamping pieces and the side pressure pads are fixed by pressing nails.
4. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein the four sides of the upper iron yoke pad, the lower iron yoke pad and the side pressure pad are milled with grooves.
5. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein the four faces of the high-voltage coil and the low-voltage coil and the insulating separating cylinders with arc connection are arranged between the high-voltage coil and the low-voltage coil.
6. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein the upper and lower ends of the coil are provided with insulation reinforced outer layer wires.
7. The novel 35kV amorphous alloy dry-type transformer with short-circuit resistance as claimed in claim 1, wherein yoke insulating spacers are disposed between the upper ends of the high-voltage coil and the low-voltage coil and the amorphous alloy upper yoke spacers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121323148.0U CN215644045U (en) | 2021-06-15 | 2021-06-15 | Novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121323148.0U CN215644045U (en) | 2021-06-15 | 2021-06-15 | Novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance |
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| CN215644045U true CN215644045U (en) | 2022-01-25 |
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| CN202121323148.0U Active CN215644045U (en) | 2021-06-15 | 2021-06-15 | Novel 35 kV-level amorphous alloy dry-type transformer with short-circuit resistance |
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2021
- 2021-06-15 CN CN202121323148.0U patent/CN215644045U/en active Active
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