CN110310802A - Oil-immersed transformer coil - Google Patents
Oil-immersed transformer coil Download PDFInfo
- Publication number
- CN110310802A CN110310802A CN201910732491.1A CN201910732491A CN110310802A CN 110310802 A CN110310802 A CN 110310802A CN 201910732491 A CN201910732491 A CN 201910732491A CN 110310802 A CN110310802 A CN 110310802A
- Authority
- CN
- China
- Prior art keywords
- oil
- immersed transformer
- coil
- item
- cross
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims description 15
- 239000011229 interlayer Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 230000035755 proliferation Effects 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- 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
- H01F27/2876—Cooling
-
- 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
- H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of oil-immersed transformer coils, several oil ducts extended transversely through are equipped in the coil, the oil duct includes the insulating stay of two parallel arrangements, it is vertical parallel on it between the insulating stay to arrange several equidistant longitudinal bracing items, vertical parallel several equidistant cross-brace items of arrangement, cross-brace item are all provided with the slope surface to bottom angled towards the side that cooling oil flows into support bar above it along longitudinal direction.Bottom longitudinal flow of the present invention, upper layer cross connection, cooling oil are linked to be an entirety, and when certain point, temperature is higher, and the temperature of place oil duct cooling oil can carry out horizontal proliferation to periphery oil duct, and realization rapidly and uniformly cool down.Cooling oil crosses to form torrent at slope surface along the laminar flow of slope surface downlink and oil duct bottom, destroys the line stability of bottom oil film, avoids the formation of static oil film, increase the temperature difference between cooling oil and coil, so that heat transference efficiency be made to increase.
Description
Technical field
The present invention relates to power transformer technical field, in particular to a kind of oil-immersed transformer coil.
Background technique
With the increase of transformer individual capacity, loss increases, thus the fever of transformer with it is cooling just compared with it is prominent
Out the problem of.The total losses of transformer are directly proportional to 0.75 power of capacity, and the surface area and capacity of transformer heat dissipation
0.5 power is directly proportional.In this way, the growth of transformer calorific value is greater than the increase of heat-delivery surface.Therefore the transformer of large capacity
With regard to needing to form thicker oil duct between coil and could effectively cool down, but the temperature of coil each section be it is different,
Certain spot temperatures will appear prominent high point, and existing oil duct is supported between coil using multiple parallel support bars,
Several parallel gaps (namely oil duct) are formed, and with the increase of support bar thickness, actually each oil duct is independent
Channel can only carry out transmitting heat along oil duct direction, and can not be to week when dashing forward high point in the position of some oil duct there are temperature
Side carries out horizontal proliferation, and it is high to thereby result in certain oil duct cooling oil temperature, and periphery oil duct does not give full play to cooling effect
The phenomenon that.Due to it is cooled between surface and cooling medium there are friction factor, in addition transformer oil flow velocity is relatively slow, transformer oil
Flow rate at cooled surface is zero, though this layer of no motion of transformer oil film is very thin, heater and cooling Jie
Temperature difference between matter mainly appears in the layer, thus prevent upper layer transformer oil with cooled surface from directly exchanging heat, it is quiet
Only the presence of oil film can make temperature that change of gradient twice be presented, so that the temperature difference is reduced, and the lower of the temperature difference just will affect hot biography
The efficiency passed, if this motionless layer is destroyed, the temperature difference will be increased sharply, therefore this motionless layer is also that coil is caused to dissipate
A low main cause of the thermal efficiency.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of heat dissipations uniformly, the fast oil-immersed transformer line of radiating efficiency
Circle.
The technical solution of the present invention is as follows:
A kind of oil-immersed transformer coil, the coil is interior to be equipped with several oil ducts extended transversely through, and the oil duct includes two
The insulating stay of item parallel arrangement, vertical parallel several equidistant longitudinal bracings of arrangement on it between the insulating stay
Item, along the longitudinal bracing item several equidistant cross-brace items of vertical parallel arrangement above it, the cross-brace item
The side flowed into towards cooling oil is all provided with the slope surface to bottom angled.
As a preferred embodiment, further, insulating stay thickness is not more than 0.1mm.
As a preferred embodiment, further, insulating stay uses the cable paper of 0.08mm.
As a preferred embodiment, further, cross-brace thickness is greater than longitudinal bracing item.
As a preferred embodiment, further, longitudinal bracing width is 1.0-1.4mm, with a thickness of 0.44-
0.53mm。
As a preferred embodiment, further, cross-brace width is 4.2-5.6mm, with a thickness of 1.4-1.7mm.
As a preferred embodiment, further, slope surface tilt angle is 30-45 °.
As a preferred embodiment, further, the coil includes the skeleton of innermost layer, and is successively wrapped outside
Low-voltage coil, interlayer insulating layer, high-tension coil and reinforcing insulating tape.
As a preferred embodiment, further, the coil is ellipse, rectangle or circle, and oil duct is with coil
Bending is moved towards to be laid with.
The invention has the beneficial effects that:
(1) cooling oil can laterally be connected by cross-brace item on upper layer by longitudinal bracing item in bottom longitudinal flow
Logical, such cooling oil is actually to be linked to be an entirety, and when certain point, temperature is higher, and the temperature of place oil duct cooling oil can
To carry out horizontal proliferation to periphery oil duct, realize that coil rapidly and uniformly cools down.
(2) cooling oil compression downlink laminar flow at slope surface crosses to form torrent with the laminar flow along oil duct bottom, destroys bottom
The line stability of layer oil film, avoids forming static oil film in bottom, increases the temperature difference between cooling oil and coil, thus
Increase heat transference efficiency.
Detailed description of the invention
Fig. 1 is overlooking structure diagram of the present invention；
Fig. 2 is oil channel structure schematic diagram of the present invention；
Fig. 3 is operation principle schematic diagram of the present invention.
In figure: 1- skeleton, 2- low-voltage coil, 3- interlayer insulating layer, 4- high-tension coil, 5- reinforce insulating tape, 6- oil duct, 61-
Longitudinal bracing item, 62- cross-brace item, 62a- slope surface, 63- insulating stay.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
It is as shown in Figs. 1-3:
A kind of oil-immersed transformer coil, the coil is interior to be equipped with several oil ducts 6 extended transversely through, and the oil duct 6 includes
The insulating stays 63 of two parallel arrangements, vertical parallel several equidistant longitudinal directions of arrangement on it between the insulating stay 63
Support bar 61, it is described along the longitudinal bracing item 61 several equidistant cross-brace items 62 of vertical parallel arrangement above it
Cross-brace item 62 is all provided with the slope surface 62a to bottom angled towards the side that cooling oil flows into.
The oil duct direction that the main flow direction of cooling oil of the present invention is formed between support bar along longitudinal direction, due to cross-brace
Presence, the thickness of cooling oil can be adjusted by adjusting the thickness of cross-brace item, and cooling oil can pass through longitudinal branch
Stay is in bottom longitudinal flow, by cross-brace item in upper layer cross connection, such cooling oil be actually be linked to be one it is whole
Body, when certain point, temperature is higher, and the temperature of place oil duct cooling oil can carry out horizontal proliferation to periphery oil duct, realizes fast
It is fast uniform cooling.Cross-brace item is all provided with the slope surface 62a to bottom angled towards the side that cooling oil flows into, when cooling oil edge
When the oil duct operation formed between longitudinal bracing item 61, whenever encountering the slope surface of cross-brace item, due to cross-brace item
Stopping, can be pressurized along slope surface to underflow, cross to form torrent with the laminar flow along oil duct bottom, flow velocity increases severely herein, and
And have downward impact force, the line stability of bottom oil film is destroyed, avoids forming static oil film in bottom, makes cooling oil
The temperature difference between coil increases, so that heat transference efficiency be made to increase.
Specifically, 63 thickness of insulating stay is not more than 0.1mm.
Specifically, cable paper of the insulating stay 63 using 0.08mm.
Specifically, 62 thickness of cross-brace item is greater than longitudinal bracing item 61.
Specifically, 61 width of longitudinal bracing item is 1.0-1.4mm, with a thickness of 0.44-0.53mm.
Specifically, 62 width of cross-brace item is 4.2-5.6mm, with a thickness of 1.4-1.7mm.
Specifically, slope surface 62a tilt angle is 30-45 °.
Coil includes the skeleton 1 of innermost layer, and successively wraps low-voltage coil 2, interlayer insulating layer 3, high-tension coil 4 outside
With reinforce insulating tape 5, this is most common loop construction, is intended only as a specific embodiment, but the line in the present invention
Circle does not limit the above structure.
The coil is ellipse, rectangle or circle, and the oil duct 6 is laid with as coil moves towards bending.
The selection of the above parameter can be adjusted according to the actual needs of heat dissipation, and the parameter area provided is suitable for common
The oil-immersed transformer of specification.The spacing of cross-brace item and the spacing ratio of longitudinal bracing item are generally in 0.9-1.2 simultaneously
Between times, the spacing of the prior art is referred to as the spacing of longitudinal bracing item, between 9.3-12mm.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (9)
1. a kind of oil-immersed transformer coil, the coil is interior to be equipped with several oil ducts (6) extended transversely through, it is characterised in that: institute
The insulating stays (63) that oil duct (6) includes two parallel arrangements are stated, vertical parallel cloth on it between the insulating stay (63)
Several equidistant longitudinal bracing items (61) are set, between the longitudinal bracing item (61) above it several grades of vertical parallel arrangement
Away from cross-brace item (62), the cross-brace item (62) is all provided with the slope surface to bottom angled towards the side that cooling oil flows into
(62a)。
2. oil-immersed transformer coil according to claim 1, it is characterised in that: insulating stay (63) thickness is little
In 0.1mm.
3. oil-immersed transformer coil according to claim 2, it is characterised in that: the insulating stay (63) uses
The cable paper of 0.08mm.
4. oil-immersed transformer coil according to claim 1, it is characterised in that: cross-brace item (62) thickness is big
In longitudinal bracing item (61).
5. oil-immersed transformer coil according to claim 4, it is characterised in that: longitudinal bracing item (61) width is
1.0-1.4mm with a thickness of 0.44-0.53mm.
6. oil-immersed transformer coil according to claim 5, it is characterised in that: cross-brace item (62) width is
4.2-5.6mm with a thickness of 1.4-1.7mm.
7. oil-immersed transformer coil according to claim 1-6, it is characterised in that: the slope surface (62a) is inclined
Rake angle is 30-45 °.
8. oil-immersed transformer coil according to claim 1-6, it is characterised in that: the coil includes most interior
The skeleton (1) of layer, and successively wrap low-voltage coil (2), interlayer insulating layer (3), high-tension coil (4) and reinforcing insulating tape outside
(5)。
9. oil-immersed transformer coil according to claim 1-6, it is characterised in that: the coil is ellipse
Shape, rectangle or circle, the oil duct (6) are laid with as coil moves towards bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732491.1A CN110310802A (en) | 2019-08-09 | 2019-08-09 | Oil-immersed transformer coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732491.1A CN110310802A (en) | 2019-08-09 | 2019-08-09 | Oil-immersed transformer coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110310802A true CN110310802A (en) | 2019-10-08 |
Family
ID=68083161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910732491.1A Pending CN110310802A (en) | 2019-08-09 | 2019-08-09 | Oil-immersed transformer coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110310802A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335745A (en) * | 2019-08-09 | 2019-10-15 | 贵州司玛特智能电气有限公司 | Oil-immersed transformer cooling oil duct structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08273945A (en) * | 1995-03-30 | 1996-10-18 | Meidensha Corp | Transformer winding |
| JP2000235926A (en) * | 1999-02-16 | 2000-08-29 | Takaoka Electric Mfg Co Ltd | Winding structure of static induction electrical equipment |
| KR20100049417A (en) * | 2008-11-03 | 2010-05-12 | 현대중공업 주식회사 | Winding part cooling device |
| CN103021630A (en) * | 2012-12-14 | 2013-04-03 | 遵义桦坤节能设备有限公司 | Guide cooling oil path structure |
| CN202996545U (en) * | 2012-12-18 | 2013-06-12 | 海南威特电气集团有限公司 | Continuous coil for longitudinal oil ways of power transformers |
| CN203706823U (en) * | 2014-03-11 | 2014-07-09 | 浙江马克变压器有限公司 | Winding structure of oil-immersed transformer |
| CN208093317U (en) * | 2018-03-29 | 2018-11-13 | 广东广特电气股份有限公司 | A kind of latticed insulation system of oil-immersed transformer |
| CN208240454U (en) * | 2018-05-23 | 2018-12-14 | 南通晓星变压器有限公司 | Oil-immersed transformer coil |
| CN110335745A (en) * | 2019-08-09 | 2019-10-15 | 贵州司玛特智能电气有限公司 | Oil-immersed transformer cooling oil duct structure |
-
2019
- 2019-08-09 CN CN201910732491.1A patent/CN110310802A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08273945A (en) * | 1995-03-30 | 1996-10-18 | Meidensha Corp | Transformer winding |
| JP2000235926A (en) * | 1999-02-16 | 2000-08-29 | Takaoka Electric Mfg Co Ltd | Winding structure of static induction electrical equipment |
| KR20100049417A (en) * | 2008-11-03 | 2010-05-12 | 현대중공업 주식회사 | Winding part cooling device |
| CN103021630A (en) * | 2012-12-14 | 2013-04-03 | 遵义桦坤节能设备有限公司 | Guide cooling oil path structure |
| CN202996545U (en) * | 2012-12-18 | 2013-06-12 | 海南威特电气集团有限公司 | Continuous coil for longitudinal oil ways of power transformers |
| CN203706823U (en) * | 2014-03-11 | 2014-07-09 | 浙江马克变压器有限公司 | Winding structure of oil-immersed transformer |
| CN208093317U (en) * | 2018-03-29 | 2018-11-13 | 广东广特电气股份有限公司 | A kind of latticed insulation system of oil-immersed transformer |
| CN208240454U (en) * | 2018-05-23 | 2018-12-14 | 南通晓星变压器有限公司 | Oil-immersed transformer coil |
| CN110335745A (en) * | 2019-08-09 | 2019-10-15 | 贵州司玛特智能电气有限公司 | Oil-immersed transformer cooling oil duct structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335745A (en) * | 2019-08-09 | 2019-10-15 | 贵州司玛特智能电气有限公司 | Oil-immersed transformer cooling oil duct structure |
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