CN107170569A - A kind of coil insulation structure - Google Patents
A kind of coil insulation structure Download PDFInfo
- Publication number
- CN107170569A CN107170569A CN201710395020.7A CN201710395020A CN107170569A CN 107170569 A CN107170569 A CN 107170569A CN 201710395020 A CN201710395020 A CN 201710395020A CN 107170569 A CN107170569 A CN 107170569A
- Authority
- CN
- China
- Prior art keywords
- electrostatic ring
- cross
- over block
- insulation structure
- straightway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The present invention relates to a kind of coil insulation structure, including：End is the pressure electrostatic ring of smooth circular sliding slopes section, presses the straightway top of electrostatic ring to be provided with cross-over block, the outer end of cross-over block is not extended through outside the straightway of pressure electrostatic ring.The present invention has the advantages that the insulating reliability that can improve whole transformer.
Description
Technical field
The present invention relates to transformer technology field, and in particular to a kind of coil insulation structure.
Background technology
At present, high-power transformer such as voltage is higher than 110KV Class power transformer overhang insulation systems：As schemed
Shown in 1, it is smooth circular sliding slopes section 31 to press the end of electrostatic ring 21, presses the top of straightway 41 of electrostatic ring 21 to be provided with
Cross-over block 11, the outer end of cross-over block 11 is located at the upper of circular sliding slopes section 31 after extending through the straightway 41 of pressure electrostatic ring 21
Side so that form " wedge shape " gap between the circular sliding slopes section 31 of cross-over block 11 and pressure electrostatic ring 21.When with above-mentioned change
After the transformer of transformer coil overhang insulation structure is positioned in the oil tank of transformer equipped with transformer oil 51, due between " wedge shape "
Always there is air or bubble because of many reasons in gap so that the bottom of cross-over block 11 and the circular arc of pressure electrostatic ring 21 connect
Connecing can be formed " oil film wedge " between section 31, i.e., transformer oil 51 is soaked in impermeable " wedge shape " gap, can thus maximum field strength occurs
In " oil film wedge " region so that the firing potential of " oil film wedge " region shelf depreciation is less than the firing potential in other regions,
Partial discharge phenomenon just easily occurs for " oil film wedge " region, so as to reduce the insulating properties of whole transformer.
The content of the invention
The technical problems to be solved by the invention are：A kind of line for the insulating reliability that can improve whole transformer is provided
Enclose insulation system.
In order to solve the above technical problems, the technical scheme is that：A kind of coil insulation structure, including：End is light
Cross-over block is provided with above the pressure electrostatic ring of sliding circular sliding slopes section, the straightway for pressing electrostatic ring, it is characterised in that：Institute
The outer end for stating cross-over block is not extended through outside the straightway of pressure electrostatic ring.
The outer end of the cross-over block is just flushed with the outside of the straightway of pressure electrostatic ring.
The present invention has the advantages that the insulating reliability that can improve whole transformer.
Brief description of the drawings
Fig. 1 is the structural representation of the coil insulation structure described in background technology.
Fig. 2 is the structural representation of coil insulation structure of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example is applied, should all belong to the scope of protection of the invention.
2 the present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 2 a kind of described coil insulation structure, including：End is quiet for the pressure of smooth circular sliding slopes section 3
Electric ring 2, presses the top of straightway 4 of electrostatic ring 2 to be provided with cross-over block 1, the outer end of cross-over block 1, which is not extended through, presses electrostatic ring
Outside 2 straightway 4；
In the present embodiment, the outer end of cross-over block 1 is just flushed with the outside of the straightway 4 of pressure electrostatic ring 2.So insulate
" wedge shape " gap will not be formed between the circular sliding slopes section 3 of cushion block 1 and pressure electrostatic ring 2, when with transformation of the present invention
After the transformer of device end turn insulation system is positioned in the oil tank of transformer equipped with transformer oil 5, the bottom of cross-over block 1
" oil film wedge " will not be formed between the circular sliding slopes section 3 of pressure electrostatic ring 2, is so avoided because transformer oil 5 soaks impermeable
" wedge shape " gap and electric-field intensity at this is become big phenomenon, and then improve the firing potential of partial discharge of transformer,
Improve the insulating reliability of whole transformer.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can be with
Realized with hardware, or firmware is realized, or combinations thereof mode is realized；In a word, it the foregoing is only technical solution of the present invention
Preferred embodiment, be not intended to limit the scope of the present invention.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (2)
1. a kind of coil insulation structure, including：End is the pressure electrostatic ring of smooth circular sliding slopes section, presses the straight of electrostatic ring
Cross-over block is provided with above line segment, it is characterised in that：The outer end of the cross-over block does not extend through the straightway for pressing electrostatic ring
Outside.
2. coil insulation structure according to claim 1, it is characterised in that：The outer end of cross-over block and pressure electrostatic ring
The outside of straightway is just flushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710395020.7A CN107170569A (en) | 2017-05-30 | 2017-05-30 | A kind of coil insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710395020.7A CN107170569A (en) | 2017-05-30 | 2017-05-30 | A kind of coil insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107170569A true CN107170569A (en) | 2017-09-15 |
Family
ID=59821500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710395020.7A Pending CN107170569A (en) | 2017-05-30 | 2017-05-30 | A kind of coil insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107170569A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243966A (en) * | 1979-04-16 | 1981-01-06 | General Electric Company | Electrostatic shielding of nonsequential disc windings in transformers |
| CN103050250A (en) * | 2012-12-25 | 2013-04-17 | 保定天威集团(江苏)五洲变压器有限公司 | Coil end insulation structure of transformer |
| CN203055637U (en) * | 2012-12-25 | 2013-07-10 | 保定天威集团(江苏)五洲变压器有限公司 | Insulation structure of end portion of transformer coil |
| CN205487697U (en) * | 2016-04-13 | 2016-08-17 | 潘秋萍 | Coil end insulation structure of transformer |
-
2017
- 2017-05-30 CN CN201710395020.7A patent/CN107170569A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243966A (en) * | 1979-04-16 | 1981-01-06 | General Electric Company | Electrostatic shielding of nonsequential disc windings in transformers |
| CN103050250A (en) * | 2012-12-25 | 2013-04-17 | 保定天威集团(江苏)五洲变压器有限公司 | Coil end insulation structure of transformer |
| CN203055637U (en) * | 2012-12-25 | 2013-07-10 | 保定天威集团(江苏)五洲变压器有限公司 | Insulation structure of end portion of transformer coil |
| CN205487697U (en) * | 2016-04-13 | 2016-08-17 | 潘秋萍 | Coil end insulation structure of transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170915 |