CN210865869U - End static ring supporting structure of transformer body with small radial coils - Google Patents
End static ring supporting structure of transformer body with small radial coils Download PDFInfo
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- CN210865869U CN210865869U CN201922336638.3U CN201922336638U CN210865869U CN 210865869 U CN210865869 U CN 210865869U CN 201922336638 U CN201922336638 U CN 201922336638U CN 210865869 U CN210865869 U CN 210865869U
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Abstract
The utility model relates to a transformer ware body takes tip static ring of little radial coil to prop tight structure belongs to large-scale power transformer technical field. The technical scheme is as follows: an electrostatic ring (3) is arranged outside the coil (2), and one side of the electrostatic ring (3) far away from the coil (2) is of an arc-shaped structure (8); the electrostatic clamp is characterized in that the U-shaped cushion block (1) is composed of two U-shaped arms (9) and an arc-shaped U-shaped bottom (7), the two U-shaped arms (9) of the U-shaped cushion block are clamped on the electrostatic ring (3), the arc-shaped U-shaped bottom (7) of the U-shaped cushion block (1) is completely identical to the arc-shaped structure (8) of the electrostatic ring (3) and is matched with the arc-shaped structure, and the two are guaranteed to be tightly attached. The utility model ensures the complete tight support between the transformer coils and the uniform oil gap, and improves the electric field distribution; the axial and radial reliable tightening can improve the short-circuit resistance and the vibration resistance of the transformer body and meet the use requirement of severe transportation conditions of the transformer.
Description
Technical Field
The utility model relates to a transformer ware body takes tip static ring of little radial coil to prop tight structure belongs to large-scale power transformer technical field.
Background
The transformer mainly comprises an iron core and a coil, wherein the iron core is in an iron core column form by stacking silicon steel sheets coated with insulating materials, the coil is sleeved on the iron core, and the iron core coil and the end part of the transformer body structure are insulated. Whether axial compression and radial bracing of an insulating part in the transformer body are reliable or not directly influences the short-circuit resistance of the transformer and the transportation capacity under severe environment. In the manufacture of large-scale power transformers with high voltage class, the end part of the transformer body with small radial coil direction is difficult to support the insulation structure, and the insulation structure must be supported tightly and the insulation margin of the high voltage class part must be satisfied, so the prior art is difficult to achieve the requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a structure for supporting the static ring at the end part of a transformer body with a small radial coil, which ensures the complete supporting between the transformer coils and the uniform oil gap at the same time, and improves the electric field distribution at the position; the axial and radial reliable tightening can improve the short-circuit resistance and the vibration resistance of the transformer body, meet the use requirement of severe transportation conditions of the transformer and solve the technical problems in the prior art.
The technical scheme of the utility model is that:
an end static ring supporting structure of a transformer body with a small radial coil comprises a U-shaped cushion block, a coil, a static ring and a forming insulating part, wherein the static ring is arranged outside the coil, and one side of the static ring, which is far away from the coil, is of an arc structure; the U-shaped cushion block is composed of two U-shaped arms and an arc-shaped U-shaped bottom, the two U-shaped arms of the U-shaped cushion block are clamped on the electrostatic ring, and the arc-shaped U-shaped bottom of the U-shaped cushion block is completely identical to the arc-shaped structure of the electrostatic ring and matched with the arc-shaped bottom of the electrostatic ring, so that the U-shaped cushion block and the electrostatic ring are tightly attached; and the U-shaped cushion block, the coil and the static ring are coated and molded with the insulating part.
The forming insulating part comprises a coil inner side forming insulating part and a coil outer side forming insulating part, and an oil gap is formed between the electrostatic ring and the coil inner side forming insulating part and between the electrostatic ring and the coil outer side forming insulating part. The shape of the arc U-shaped bottom of the U-shaped cushion block is matched with that of the coil inner side forming insulating part contacted with the outside, and the U-shaped bottom and the coil inner side forming insulating part are tightly attached.
The U-shaped cushion block is made of laminated paper boards, and the laminating direction is parallel to the oil clearance direction.
The U-shaped cushion block is adhered to the electrostatic ring of the coil by insulating glue, so that oil gaps among the coil, the electrostatic ring, the coil inner side forming insulating part and the coil outer side forming insulating part are guaranteed.
The utility model discloses a U type cushion props tight oil clearance respectively from the inside and outside, when guaranteeing that the little width of cloth props tightly to the coil tip, utilizes the cooperation of the inside and outside of U type cushion and the inboard shaping insulating part of electrostatic ring and coil, ensures that the tip electric field distributes evenly and the oil stream is unobstructed. The transformer end insulation structure is high in applicable voltage level and small in coil radial direction, the distribution of an electric field at the end is improved, and the influence of short-circuit force and external force on the transformer end insulation structure in the lifting and transporting process of the transformer is effectively reduced through the compression measure on the transformer.
The utility model has the advantages that: the complete tightness of the transformer coils is ensured, the oil clearance is ensured to be uniform, and the electric field distribution at the position is improved; the axial and radial reliable tightening can improve the short-circuit resistance and the vibration resistance of the transformer body and meet the use requirement of severe transportation conditions of the transformer.
Drawings
FIG. 1 is a schematic view of the U-shaped cushion block of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic top view of the present invention;
in the figure: the coil comprises a U-shaped cushion block 1, a coil 2, an electrostatic ring 3, a coil outer side forming insulating part 4, a coil middle stay 5, an oil gap 6, an arc-shaped U-shaped bottom 7, an arc-shaped structure 8, a U-shaped arm 9 and a coil inner side forming insulating part 10.
Detailed Description
The present invention will be further described with reference to the following examples in conjunction with the accompanying drawings.
An end static ring supporting structure of a transformer body with a small radial coil comprises a U-shaped cushion block 1, a coil 2, a static ring 3 and a forming insulating part, wherein the static ring 3 is arranged outside the coil 2, and an arc-shaped structure 8 is arranged on one side of the static ring 3 away from the coil 2; the U-shaped cushion block 1 consists of two U-shaped arms 9 and an arc-shaped U-shaped bottom 7, the two U-shaped arms 9 of the U-shaped cushion block are clamped on the electrostatic ring 3, and the arc-shaped U-shaped bottom 7 of the U-shaped cushion block 1 is completely the same as the arc-shaped structure 8 of the electrostatic ring 3 and matched with each other to ensure that the two are tightly attached; and the U-shaped cushion block 1, the coil 2 and the electrostatic ring 3 are coated and molded with insulating parts.
The molded insulator comprises a coil inner molded insulator 10 and a coil outer molded insulator 4, and an oil gap 6 is formed between the electrostatic ring 3 and the coil inner molded insulator and the coil outer molded insulator. The shape of the arc U-shaped bottom 7 of the U-shaped cushion block 1 is matched with that of the coil inner side forming insulating part 10 which is contacted with the outside, so that the two are tightly attached.
The U-shaped cushion block 1 is made of laminated paper boards, and the laminating direction is parallel to the oil clearance direction.
The U-shaped cushion block 1 is adhered to the electrostatic ring 3 of the coil 2 by insulating glue, so that an oil gap 6 between the coil 2, the electrostatic ring 3 and the coil inner side forming insulating part 10 and the coil outer side forming insulating part 4 is ensured.
And a coil middle stay 5 is arranged between the coil 2 and the U-shaped cushion block 1.
The utility model discloses a U type cushion props tight oil clearance respectively from the inside and outside, when guaranteeing that the little width of cloth props tightly to the coil tip, utilizes the cooperation of the inside and outside of U type cushion and the inboard shaping insulating part of electrostatic ring and coil, ensures that the tip electric field distributes evenly and the oil stream is unobstructed. The transformer end insulation structure is high in applicable voltage level and small in coil radial direction, the distribution of an electric field at the end is improved, and the influence of short-circuit force and external force on the transformer end insulation structure in the lifting and transporting process of the transformer is effectively reduced through the compression measure on the transformer.
Claims (2)
1. The utility model provides a transformer ware body takes tip static ring of little radial coil to prop tight structure which characterized in that: the coil comprises a U-shaped cushion block (1), a coil (2), an electrostatic ring (3) and a forming insulating part, wherein the electrostatic ring (3) is arranged outside the coil (2), and one side of the electrostatic ring (3) far away from the coil (2) is of an arc-shaped structure (8); the electrostatic clamp is characterized in that the U-shaped cushion block (1) consists of two U-shaped arms (9) and an arc-shaped U-shaped bottom (7), the two U-shaped arms (9) of the U-shaped cushion block are clamped on the electrostatic ring (3), and the arc-shaped U-shaped bottom (7) of the U-shaped cushion block (1) is completely the same as the arc-shaped structure (8) of the electrostatic ring (3) and matched with each other to ensure that the two are tightly attached; the U-shaped cushion block (1), the coil (2) and the electrostatic ring (3) are coated and molded with insulating parts.
2. The structure of claim 1, wherein the electrostatic ring-tightening structure for the transformer body with the small radial coil comprises: the forming insulation part comprises a coil inner side forming insulation part (10) and a coil outer side forming insulation part (4), and an oil gap (6) is formed between the electrostatic ring (3) and the coil inner side forming insulation part and between the electrostatic ring and the coil outer side forming insulation part; the arc U-shaped bottom (7) of the U-shaped cushion block (1) is matched with the shape of the coil inner side forming insulating part (10) contacted with the outside, and the U-shaped bottom and the coil inner side forming insulating part are tightly attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922336638.3U CN210865869U (en) | 2019-12-24 | 2019-12-24 | End static ring supporting structure of transformer body with small radial coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922336638.3U CN210865869U (en) | 2019-12-24 | 2019-12-24 | End static ring supporting structure of transformer body with small radial coils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210865869U true CN210865869U (en) | 2020-06-26 |
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ID=71293455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922336638.3U Active CN210865869U (en) | 2019-12-24 | 2019-12-24 | End static ring supporting structure of transformer body with small radial coils |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210865869U (en) |
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2019
- 2019-12-24 CN CN201922336638.3U patent/CN210865869U/en active Active
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