CN208985846U - A kind of dry-type transformer, transformation winding and its insulating shield cylinder - Google Patents
A kind of dry-type transformer, transformation winding and its insulating shield cylinder Download PDFInfo
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- CN208985846U CN208985846U CN201821888344.0U CN201821888344U CN208985846U CN 208985846 U CN208985846 U CN 208985846U CN 201821888344 U CN201821888344 U CN 201821888344U CN 208985846 U CN208985846 U CN 208985846U
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- 238000004804 winding Methods 0.000 title claims abstract description 37
- 230000009466 transformation Effects 0.000 title abstract description 5
- 238000009413 insulation Methods 0.000 claims description 51
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229920000784 Nomex Polymers 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000004763 nomex Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 9
- 235000017491 Bambusa tulda Nutrition 0.000 description 9
- 241001330002 Bambuseae Species 0.000 description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 9
- 239000011425 bamboo Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
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- Insulating Of Coils (AREA)
Abstract
The utility model discloses a kind of insulating shield cylinders, including insulating shield cylinder ontology, which is characterized in that the insulating shield cylinder ontology includes: to be connected with ground wire, with to avoid the shielded layer for sealing in harmonic wave；The first insulating layer on the inside of the shielded layer；Second insulating layer on the outside of the shielded layer；Wherein, first insulating layer and the second insulating layer at least one be connected with the shielded layer.Above-mentioned insulating shield cylinder reduces the distance between high-tension coil and low-voltage coil, is able to solve the bulky problem of dry-type transformer, while reducing sole mass, also helps and the movement such as is transported, lifted and installed to it.In addition, the invention also discloses a kind of transformation winding including above-mentioned insulating shield cylinder and a kind of dry-type transformers including above-mentioned transformation winding.
Description
Technical Field
The utility model belongs to the technical field of power equipment makes and specifically relates to an insulation shielding section of thick bamboo, in addition, the utility model discloses still relate to a transformer winding and a dry-type transformer including above-mentioned transformer winding of an insulation shielding section of thick bamboo.
Background
A dry-type transformer is a transformer in which an iron core and a winding are cooled by air without being immersed in insulating oil. The dry-type transformer can be divided into a single-phase transformer and a three-phase dry-type transformer according to the number of phases, and the three-phase dry-type transformer is taken as an example and comprises three groups of transformation windings connected with each other.
At present, referring to fig. 1, fig. 1 is a cross-sectional view of a transformer winding in the prior art, which generally includes an iron core 01 as a center, and a low-voltage coil 02, a first insulating cylinder 03, a shielding layer 04, a second insulating cylinder 05 and a high-voltage coil 06 arranged in sequence from inside to outside. In the process of manufacturing the transformer winding, the first insulating cylinder 03, the shielding layer 04 and the second insulating cylinder 05 are manufactured separately and then installed sequentially from inside to outside, so that a certain distance exists between the shielding layer 04 arranged between the first insulating cylinder 03 and the second insulating cylinder 05 and the first insulating cylinder and the second insulating cylinder, the distance between the high-voltage coil 02 and the low-voltage coil 02 is increased due to the existence of the distance, the leakage area is increased, other performance parameters (such as impedance voltage) of the transformer winding are changed correspondingly, in order to meet the requirements of new performance parameters, the whole transformer winding needs to be designed to be heightened, which brings about the problem that the whole volume of the transformer winding is too large, if the dry-type transformer is bulky, the manufacturing cost is not increased due to light, and many inconveniences are caused in the aspects of transportation, hoisting, installation and the like, especially for the large-sized dry-type transformer, if the size and mass are too large and exceed the state-specified road transportation limits, the product will not be transported to the construction job site.
Therefore, a person skilled in the art needs to solve the problem of the large size of the dry-type transformer by reducing the distance between the high-voltage coil 06 and the low-voltage coil 02.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an insulation shielding section of thick bamboo, this insulation shielding section of thick bamboo has reduced the distance between high-voltage coil and the low-voltage coil, can solve the bulky problem of dry-type transformer, when reducing self quality, still is favorable to transporting, action such as hoist and mount and installation to it.
In order to achieve the above object, the utility model provides an insulation shielding section of thick bamboo, including insulation shielding section of thick bamboo body, its characterized in that, insulation shielding section of thick bamboo body includes: a shielding layer connected with the ground wire for avoiding the series connection of harmonic waves; the first insulating layer is arranged on the inner side of the shielding layer; the second insulating layer is arranged on the outer side of the shielding layer; wherein at least one of the first insulating layer and the second insulating layer is connected to the shielding layer.
Preferably, the first insulating layer and the second insulating layer are both connected to the shielding layer.
Preferably, the shielding layer is formed by winding a copper foil.
Preferably, the first insulating layer and the second insulating layer are wound by one of DMD insulating paper, NOMEX insulating paper and SHS insulating paper.
Preferably, the thickness of the first insulating layer is smaller than the thickness of the second insulating layer.
Preferably, the cross-sectional profile of the shielding layer is in the shape of a perfect circle.
Compared with the background art, the insulation shielding cylinder provided by the utility model reduces the distance between the low-voltage coil and the high-voltage coil by arranging at least one of the first insulation layer and the second insulation layer and the shielding layer as a whole, and preferably, the first insulation layer, the shielding layer and the second insulation layer between the high-voltage coil and the low-voltage coil are arranged as a whole, that is, the first insulation layer and the second insulation layer are respectively and directly arranged at the inner side surface and the outer side surface of the shielding layer, specifically, the first insulation layer is firstly wound by using insulation paper, then a shielding layer is wound by copper foil clinging to the outer side surface of the first insulating layer, finally a second insulating layer is wound on the outer side surface of the shielding layer by insulating paper, therefore, no gap exists between the first insulating layer and the shielding layer and between the second insulating layer and the shielding layer, and the distance between the high-voltage coil and the low-voltage coil is reduced to the maximum extent.
The utility model also provides a transformer winding, including the iron core with in proper order outside suit in the low-voltage coil and the high-voltage coil of iron core, be equipped with as above-mentioned arbitrary one between low-voltage coil and the high-voltage coil an insulation shielding section of thick bamboo.
The utility model also provides a dry-type transformer, including the base that is equipped with the fan, still include at least one and locate the base, as above-mentioned transformation winding.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a cross-sectional view of a prior art transformer winding;
fig. 2 is a cross-sectional view of a transformer winding provided by the present invention;
FIG. 3 is a cross-sectional view of the body of the dielectric shield can of FIG. 2;
wherein,
01-iron core, 02-low voltage coil, 03-first insulating cylinder, 04-shielding layer, 05-second insulating cylinder, 06-high voltage coil, 1-iron core, 2-low voltage coil, 3-insulating shielding cylinder body, 31-first insulating layer, 32-shielding layer, 33-second insulating layer, 4-high voltage coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 2 and fig. 3, fig. 2 is a cross-sectional view of a transformer winding according to the present invention; fig. 3 is a cross-sectional view of the body of the dielectric shield can of fig. 2.
The utility model provides an insulation shielding cylinder, which comprises an insulation shielding cylinder body 3, wherein the insulation shielding cylinder body 3 comprises a shielding layer 32 which is connected with a ground wire and used for harmonic wave to be connected into a power grid in series, a first insulation layer 31 which is arranged at the inner side of the shielding layer 32 and used for increasing the insulation strength between a low-voltage coil 2 and the shielding layer 32, and a second insulation layer 33 which is arranged at the outer side of the shielding layer 32 and used for increasing the insulation strength between a high-voltage coil 4 and the shielding layer 32; at least one of the first insulating layer 31 and the second insulating layer 33 is connected to the shielding layer 32 to shorten the distance between the high voltage coil 4 and the low voltage coil 2.
It should be noted here that the "inner side" in this context is understood to mean the side of the object close to the core 1 of the transformer winding, and the "outer side" is understood to mean the side of the object remote from the core 1 of the transformer winding.
In the first embodiment, in order to shorten the distance between the low voltage coil 2 and the high voltage coil 4, the first insulating layer 31 and the shielding layer 32 are integrally provided, specifically, the first insulating layer 31 is wound by insulating paper, then the shielding layer 32 is directly wound on the outer side surface of the first insulating layer 31, and finally the second insulating layer 33 is separately provided on the outer side surface of the shielding layer 32, which finally represents that the distance between the low voltage coil 2 and the high voltage coil 4 is shortened by the distance m between the first insulating cylinder 03 and the shielding layer 04 in the prior art2。
In the second embodiment, in order to shorten the distance between the low voltage coil 2 and the high voltage coil 4, the second insulating layer 33 is integrally provided with the shield layer 32, specifically, the first insulating layer 31 is separately provided on the inner side of the inner side surface of the shield layer 32, and the second insulating layer 33 is directly wound on the outer side surface of the shield layer 32 by using insulating paper, so that the distance between the low voltage coil 2 and the high voltage coil 4 is finally shortened by the distance m between the shield layer 04 and the second insulating cylinder 05 in the prior art3。
It should be noted here that in the above two embodiments, "separately disposed" is understood to mean a manner of disposing in a state of being separated from the shielding layer 32.
In the third embodiment, in order to shorten the distance between the low voltage coil 2 and the high voltage coil 4, the first insulating layer 31 and the second insulating layer 33 are both integrally disposed with the shielding layer 32, specifically, as shown in fig. 3, the first insulating layer 31 is wound by insulating paper, then the shielding layer 32 is directly wound on the outer side surface of the first insulating layer 31, and finally the second insulating layer 33 is wound by insulating paper on the outer side surface of the shielding layer 32, so that the distance between the low voltage coil 2 and the high voltage coil 4 is shortened to be the distance m between the first insulating cylinder 03 and the shielding layer 04 in the prior art2Distance from the shielding layer 04 and the second insulating cylinder 05 in the prior artm3Sum of m1I.e. the shortened distance m in the present embodiment1＝m2+m3。
It should be noted that, in the above three embodiments, the shielding layer 32 is preferably formed by winding a copper foil, but may also be formed by winding a copper wire, and the first insulating layer 31 and the second insulating layer 33 are preferably formed by winding one of DMD insulating paper, NOMEX insulating paper and SHS insulating paper, but of course, the first insulating layer 31 and the second insulating layer 33 may also be formed by winding the same kind of insulating paper instead of winding, for example, the first insulating layer 31 is formed by winding DMD insulating paper, and the second insulating layer 33 is formed by winding SHS insulating paper; if the first insulating layer 31 and the second insulating layer are separately provided, they may be formed by casting epoxy glass cloth or by winding a polyester film.
It should be further explained that "distance" in this context is understood to be the distance resulting from the difference between different positions in the radial direction centered on the core 1.
It is worth mentioning that, as mentioned above, the first insulating layer 31 is used for insulating the low-voltage coil 2 from the shielding layer 32, and the second insulating layer 33 is used for insulating the high-voltage coil 4 from the shielding layer 32, generally speaking, the voltage V between the low-voltage coil 2 and the shielding layer 321Less than the voltage V between the high-voltage coil 4 and the shield layer 322Here, the insulation strength of the first insulation layer 31 may be smaller than that of the second insulation layer 33.
In concrete terms, if the first insulating layer 31 and the second insulating layer 33 are both made of the same insulating paper, for example, made of NOMEX insulating paper, the thickness s of the first insulating layer 31 is1May be smaller than the thickness s of the second insulating layer 332To reduce the thickness of the shield insulating cylinder, to save manufacturing cost to some extent, and to further reduce the distance between the high voltage coil 4 and the low voltage coil 2, the thickness s of the first insulating layer 31 should be satisfied1A condition for maintaining insulation between the low-voltage coil 2 and the shield layer 32, and a thickness s of the second insulation layer 332The high voltage coil 4 and the shielding layer 32Maintaining the condition of insulation.
If the first insulating layer 31 and the second insulating layer 33 are made of different types of insulating paper, for example, the first insulating layer 31 is made of DMD insulating paper and the second insulating layer 33 is made of SHS insulating paper, the thickness s of the first insulating layer 31 is larger1And the thickness s of the second insulating layer 332The size relationship between the two parts is determined according to actual conditions.
Here, s that satisfies the condition of maintaining insulation between the low-voltage coil 2 and the shield layer 32 is to be described1And s maintaining an insulating condition between the high-voltage coil 4 and the shield layer 322Are all within the protection scope of the utility model.
Generally speaking, the cross section of the iron core 1 of the transformer winding is preferably designed to be a perfect circle, and accordingly, the cross section profiles of the five of the low-voltage coil 2, the first insulating layer 31, the shielding layer 32, the second insulating layer 33 and the high-voltage coil 4 are all in a perfect circle around the cylindrical iron core 1, that is, the cross section of the insulating shielding cylinder is in a perfect circular ring shape.
The utility model provides a transformer winding, as shown in figure 2, comprising an iron core 1, a low-voltage coil 2 and a high-voltage coil 4 which are arranged outwards in sequence, wherein an insulation shielding cylinder is arranged between the low-voltage coil 2 and the high-voltage coil 4; other parts of the transformer winding may be referred to in the art and are not expanded herein.
The utility model provides a dry-type transformer, including the base that is equipped with the fan, still be equipped with on the base as above-mentioned vary voltage winding, take three-phase dry-type transformer as an example, be equipped with three vary voltage winding that changes three-phase alternating current and voltage through doing the three-phase connection on the base; the wind turbine, the base and other parts of the dry-type transformer can be referred to the prior art and are not expanded herein.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
It is right above that the utility model provides a dry-type transformer, transformer winding and insulation shielding section of thick bamboo thereof have introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. An insulation shielding cylinder, characterized by comprising an insulation shielding cylinder body (3), wherein the outer circumference of the insulation shielding cylinder body (3) is wrapped with:
a shield layer (32) connected to the ground line for preventing a harmonic from being introduced;
a first insulating layer (31) provided inside the shielding layer (32);
a second insulating layer (33) provided outside the shield layer (32);
wherein at least one of the first insulating layer (31) and the second insulating layer (33) is connected to the shielding layer (32).
2. The insulation shielding cartridge according to claim 1, characterized in that the first insulation layer (31) and the second insulation layer (33) are both connected to the shielding layer (32).
3. The insulation shielding can of claim 2, wherein the shield layer (32) is wound from copper foil.
4. Insulation shielding cartridge according to claim 3, characterized in that the first insulation layer (31) and the second insulation layer (33) are wound from one of DMD insulation paper, NOMEX insulation paper and SHS insulation paper.
5. The insulation shielding cartridge according to any of claims 2 to 4, characterized in that the thickness of the first insulation layer (31) is smaller than the thickness of the second insulation layer (33).
6. The insulation shield canister of claim 5, wherein the cross-sectional profile of the shield layer (32) is right circular in shape.
7. A transformer winding comprising an iron core (1) and a low voltage coil (2) and a high voltage coil (4) arranged in sequence outwardly, characterized in that an insulating shielding cylinder according to any one of claims 1 to 6 is arranged between the low voltage coil (2) and the high voltage coil (4).
8. A dry-type transformer comprising a base provided with a fan, characterized in that it further comprises at least one transformer winding according to claim 7 provided on said base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888344.0U CN208985846U (en) | 2018-11-15 | 2018-11-15 | A kind of dry-type transformer, transformation winding and its insulating shield cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888344.0U CN208985846U (en) | 2018-11-15 | 2018-11-15 | A kind of dry-type transformer, transformation winding and its insulating shield cylinder |
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| Publication Number | Publication Date |
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| CN208985846U true CN208985846U (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821888344.0U Active CN208985846U (en) | 2018-11-15 | 2018-11-15 | A kind of dry-type transformer, transformation winding and its insulating shield cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911164A (en) * | 2019-12-04 | 2020-03-24 | 江苏大航有能输配电有限公司 | 3-fold redundant high-voltage insulation system, design method thereof and dry-type transformer |
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2018
- 2018-11-15 CN CN201821888344.0U patent/CN208985846U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911164A (en) * | 2019-12-04 | 2020-03-24 | 江苏大航有能输配电有限公司 | 3-fold redundant high-voltage insulation system, design method thereof and dry-type transformer |
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