CN206363869U - A kind of built-in magnetic shielding transformer device body pressing plate - Google Patents
A kind of built-in magnetic shielding transformer device body pressing plate Download PDFInfo
- Publication number
- CN206363869U CN206363869U CN201720022975.3U CN201720022975U CN206363869U CN 206363869 U CN206363869 U CN 206363869U CN 201720022975 U CN201720022975 U CN 201720022975U CN 206363869 U CN206363869 U CN 206363869U
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- pressing plate
- magnetic screen
- built
- top board
- device body
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Abstract
A kind of built-in magnetic shielding transformer device body pressing plate, belongs to transformer technology field, including top board, takeup type magnetic screen, lower platen and high-strength nylon bolt.Takeup type magnetic screen is built in pressing plate by the utility model, realize all standing to whole winding, cause winding overhang electromagnetic wire hot-spot because of the increase of horizontal leakage field for solving traditional structure magnetic screen, accelerate insulation ag(e)ing and reduce the shortcoming of transformer service life, while not influenceing the installation dimension of transformer body pressing plate, fit dimension, electric property and mechanical performance with transformer body miscellaneous part.
Description
Technical field
The utility model belongs to transformer technology field, especially relates to a kind of built-in magnetic shielding transformer device body pressure
Plate.
Background technology
Transformer is the device for changing alternating voltage using electromagnetic induction principle, by purposes can be divided into power transformer and
Special transformer etc..With expanding economy and the continuous progress of science and technology, new material, the continuous application of new technology, transformer is not
By there is huge raising from voltage class or capacity.With the increase of transformer capacity, the rated current of transformer
Increase therewith, during transformer station high-voltage side bus, winding will be by that will produce magnetic field after electric current, because the iron core of transformer is by cold-rolled orientation silicon
Steel disc is processed, with excellent magnetic property, so most of magnetic flux all circulates in the core, but also some magnetic
Cross the air gap all or transformer oil be transmitted on the hardwares such as transformer case, folder, thus induce vortex and
Increase transformer loss, with the increase of electric current, loss of the leakage magnetic flux produced by hardware is bigger, or even causes office
Portion's hardware overheat, so as to cause transformer oil chromatographic exceeded and because sealing gasket crosses the failures such as heat ageing permeability.In order to drop
Low stray transformer flux leads to the loss produced on hardware and avoids hot-spot, and usual way is in oil in current industry
The magnetic screen that increase is made of cold-rolled orientation silicon steel piece on the hardwares such as case tank wall, folder, transformer in the process of running,
Leakage magnetic flux enters the hardware that magnetic screen is rather than directly into magnetic screen present position, because of cold-rolled orientation used in magnetic screen
Silicon steel sheet magnetic property is much better than the magnetic property of hardware steel plate materialses, therefore the loss very little produced, will not produce
Raw hot-spot phenomenon.It is along axis of winding lineal layout, but because transformer is different under the leakage field theoretical case of transformer
There is the factors such as the imbalance of ampere-turn distribution between winding, cause leakage field to there is certain width to component, width exists to the leakage field of component
Width produces horizontal leakage field on Transformer Winding electromagnetic wire, and horizontal leakage field is greater than in winding in the density of winding overhang
Portion, this horizontal leakage field can produce certain eddy-current loss on electromagnetic wire, so that increase the loss of transformer, usual electromagnetic wire
Width is larger, and the eddy-current loss produced by horizontal leakage field and the width of electromagnetic wire square are directly proportional, therefore laterally
In the windings, the eddy-current loss that particularly winding overhang is produced is extremely considerable for leakage field.But because high-power transformer generally uses magnetic
Screening arrangement, the addition of magnetic screen substantially guides leakage magnetic flux to enter magnetic screen, so as to reduce leakage magnetic flux in hardware
The loss of middle generation, but the addition of magnetic screen, because it is not located at the surface or lower section of winding, and magnetic screen is to leakage magnetic flux
Distribution serve a guiding function, channeling direction changes the direction of leakage field with leakage field direction at an angle, thus,
The ratio of horizontal leakage field is increased, the horizontal eddy-current loss increase for causing leakage field to be produced in winding overhang electromagnetic wire.For spy
For high-power transformer, the addition of magnetic screen not only makes the horizontal eddy-current loss increase of winding overhang electromagnetic wire, and main asks
Topic be winding upper end in transformer top, be high oil temperature area, the increase of eddy-current loss can cause winding overhang electromagnetic wire office
Portion is overheated, and is accelerated insulation ag(e)ing and is reduced transformer service life.
A kind of new magnet shielding structure how is designed, is allowed to reduce eddy-current loss of the leakage field in hardware, and
Winding overhang electromagnetic wire hot-spot will not be caused because of the increase of horizontal leakage field, accelerate insulation ag(e)ing and reduce transformer and use
Life-span.This domestic and international key problem in technology point exactly in design of transformer.
The content of the invention
Technical problem to be solved in the utility model is：A kind of built-in magnetic shielding transformer device body pressing plate is provided, by magnetic
Shielding is built in pressing plate, causes winding overhang electromagnetic wire office because of the increase of horizontal leakage field for solving traditional structure magnetic screen
Portion is overheated, and is accelerated insulation ag(e)ing and is reduced the shortcoming of transformer service life, while not influenceing the installation of transformer body pressing plate
Size, fit dimension, electric property and mechanical performance with transformer body miscellaneous part.
A kind of built-in magnetic shielding transformer device body pressing plate, including top board, takeup type magnetic screen, lower platen and high intensity Buddhist nun
Imperial bolt,
The top board is that grounding copper band perforate and nylon bolt perforate, upper pressure are provided with cirque structure, top board
The inner annular edge of plate is provided with low pressure winding and lifted one's head gap, and the bottom of top board is provided with oil guide groove；Set in the oil guide groove
There is equally distributed oil guiding hole, the diameter center linear dimension of oil guide groove is consistent with the center linear dimension of takeup type magnetic screen；
The lower platen is cirque structure, and the top of lower platen is provided with magnetic screen fixing groove, the inner ring side of lower platen
Edge is provided with low pressure winding and lifted one's head gap, is provided with nylon bolt screwed hole on lower platen, lower platen passes through high-strength nylon spiral shell
Bolt is fixedly connected with top board；The internal diameter size of the magnetic screen fixing groove is than the takeup type small 1mm of magnetic screen internal diameter size, magnetic cup
Cover outside dimension big 1mm of the outside dimension than takeup type magnetic screen of fixing groove, the depth ratio takeup type magnetic of magnetic screen fixing groove
The big 1mm of thickness of shielding；
The takeup type magnetic screen includes grounding copper band, winding silicon steel lamellar body, the U.S. paper of Nomex promises and epoxy resin cure
Layer, the top of takeup type magnetic screen is connected with top board, and the bottom of takeup type magnetic screen passes through magnetic screen fixing groove and lower platen
Connection；The top of the grounding copper band is through grounding copper with the top for being located at top board after perforate, and the top of grounding copper band is set
There is diameterCircular hole, the bottom of grounding copper band passes through soldering and welded with winding silicon steel lamellar body；The winding silicon steel lamellar body
Formed for the wide cold-rolled orientation silicon steel piece windings of 20mm~40mm, wind outer radius of the internal diameter size than low pressure winding of silicon steel lamellar body
The big 30mm of size, winds outside dimension small 80mm of the outside dimension than top board of silicon steel lamellar body, winds the outside of silicon steel lamellar body
It is provided with the epoxy resin cure layer of epoxy resin cure formation；The U.S. paper bag of the Nomex promises is rolled in epoxy resin cure layer
It is outside；
The high-strength nylon bolt is connected after passing through nylon bolt perforate with nylon bolt screwed hole, high-strength nylon spiral shell
Bolt is provided with elongated steam vent in centre along its length.
The thickness of the top board is 10mm~20mm.
The thickness of the lower platen is 40mm~80mm.
The grounding copper band is thick, the wide 40mm copper strips of 0.3mm.
Thickness value big 15mm of the spiro rod length of the high-strength nylon bolt than top board.
The oil guiding hole is diameterCircular hole, the spacing between two neighboring oil guiding hole is 100mm~120mm.
The width 12mm of the oil guide groove, depth is 5mm, oil guide groove and lower platen inner ring concentric.
The depth of thread of the nylon bolt screwed hole is 20mm.
The bore dia of the elongated steam vent is
By above-mentioned design, the utility model can bring following beneficial effect：
Takeup type magnetic screen in the utility model is placed in inside device body pressing plate, is reduced leakage field and is produced on hardware
Raw eddy-current loss, and the installation dimension, electric property and mechanical performance of transformer body pressing plate are not influenceed.Simultaneously because of takeup type
Magnetic screen is located at the top of Transformer Winding, reduces the eddy-current loss that leakage field is produced on hardware, it is to avoid tradition
While structure magnetic screen aggravation horizontal leakage field, leakage field is attracted to device body, it is to avoid the bending of leakage field, reduces transverse direction
Leakage flux, it is to avoid traditional structure magnetic screen because of the increase of horizontal leakage field causes winding overhang electromagnetic wire hot-spot, plus
Fast insulation ag(e)ing and reduce the shortcoming of transformer service life.
Takeup type magnetic screen in the utility model can realize all standing to whole winding, compared with traditional structure magnetic screen
Shield effectiveness is improved by block distribution arrangement；Takeup type magnetic screen is that the wide cold-rolled orientation silicon steel piece bands of 20mm~40mm are continuously rolled up
Around into technique is simple, and operating efficiency is high；Takeup type magnetic screen is continuous coiling, and shearing is reduced compared with traditional structure magnetic screen
Process, it is to avoid influence of the shearing to silicon steel sheet magnetic property, is conducive to the reduction of stray loss, silicon steel sheet thickness direction direction
Leakage field direction, eddy-current loss is low；The complete shielding to leakage field can be realized, is reduced into hardwares such as fuel tank and folders
Leakage field, customer service traditional structure magnetic screen can not accomplish the complete shielding to coil leakage field, there is respective regions shielding endless
Full shortcoming；Each pressing plate only needs a ground connection, thus earthed system technique is simple, improves reliability, overcomes conventional junction
Polylith magnetic screen is arranged on one pressing plate of structure magnetic screen, every piece of magnetic screen is required to be grounded, earthed system is complicated, be grounded number
The increase of amount also reduces the defect of reliability.
Brief description of the drawings
The utility model is further described below in conjunction with the drawings and specific embodiments：
Fig. 1 is a kind of structural representation of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 2 is a kind of overlooking the structure diagram of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 3 is the structural representation of top board in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 4 is the overlooking the structure diagram of top board in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 5 is the structural representation of takeup type magnetic screen in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model
Figure.
Fig. 6 is that the plan structure of takeup type magnetic screen in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model is shown
It is intended to.
Fig. 7 is the structural representation of lower platen in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 8 is the overlooking the structure diagram of lower platen in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model.
Fig. 9 is the structural representation of high-strength nylon bolt in a kind of built-in magnetic shielding transformer device body pressing plate of the utility model
Figure.
In figure, 1- top boards, the magnetic screen of 2- takeup types, 3- lower platens, 4- grounding coppers band, 5- high-strength nylons bolt, 6-
Grounding copper band perforate, 7- low pressure windings are lifted one's head gap, 8- oil guiding holes, 9- oil guide grooves, the perforate of 10- nylon bolts, 11- iron winding silicon
Steel disc body, the U.S. paper of 12-Nomex promises, 13- epoxy resin cures layer, 14- magnetic screens fixing groove, 15- nylon bolts screwed hole, 16-
Elongated steam vent.
Embodiment
As illustrated, a kind of built-in magnetic shielding transformer device body pressing plate, including top board 1, takeup type magnetic screen 2, push
Plate 3 and high-strength nylon bolt 5 are constituted.The takeup type magnetic screen is welded with grounding copper band 4.The top board 1 and lower platen 3 are opened
There is low pressure winding to lift one's head gap 7.
The top board 1, including the perforate 6 of grounding copper band, oil guiding hole 8, oil guide groove 9, low pressure winding are lifted one's head gap 7 and nylon
Bolt aperture 10.Top board 1 is circular ring structure, inside/outside diameter size with traditional structure transformer device body pressing plate, thickness be 10mm~
20mm, its material is lamination wood, laminated paper board or hot pressing polyester resin plastic laminates.Top board is furnished with grounding copper band perforate 6,
Drawn for the grounding copper band 4 of takeup type magnetic screen 2；Oil guiding hole 8 and oil guide groove 9 are provided with top board 1, for takeup type magnetic cup
2 formation heat transmission oil flow channels use is covered, oil guiding hole is diameterCircular hole, spacing 100mm~120mm, in oil guide groove 9
Side, oil guide groove 9 is located at the bottom of top board 1, width 12mm, depth 5mm, the diameter center linear dimension of oil guide groove 9 and takeup type magnetic cup
Cover 2 center linear dimensions consistent；Top board 1 is lifted one's head gap 7 equipped with low pressure winding, is drawn for transformer low voltage Winding tap；On
Pressing plate 1 is furnished with nylon bolt perforate 10, is used for being connected between top board 1 and lower platen 3 using high-strength nylon bolt 5.
The takeup type magnetic screen 2, including grounding copper band 4, winding silicon steel lamellar body 11, the U.S. paper 12 of Nomex promises and asphalt mixtures modified by epoxy resin
Fat cured layer 13.Grounding copper band 4 is 0.3mm thick, and the wide copper strips of 40mm, the top of grounding copper band 4 is provided with diameterCircular hole, connects
Welded with winding silicon steel lamellar body 11 using soldering the bottom of ground copper strips 4；It is the wide cold-rolled orientations of 20mm~40mm to wind silicon steel lamellar body 11
Silicon-steel sheet coiled is around into its internal diameter size is that low pressure winding outer radial dimension adds 30mm, and outside dimension is pressing plate outer radial dimension
Subtract 80mm, because silicon steel sheet thickness side is towards stray field, therefore the eddy-current loss produced in silicon steel sheet can be reduced；Wind silicon steel sheet
The winding of body 11 is completed and welded after grounding copper band 4, is solidified using epoxy resin cure layer 13, finally with the U.S. paper of Nomex promises
12Nomex U.S.s promise paper half lap wraps up 2 layers.
The lower platen 3, including takeup type magnetic screen fixing groove 14, low pressure winding are lifted one's head gap 7 and nylon bolt screw thread
Hole 16.Lower platen 3 is circular ring structure, and inside/outside diameter size is with traditional structure transformer device body pressing plate, and thickness is 40mm~80mm, its
Material is lamination wood, laminated paper board or hot pressing polyester resin plastic laminates.Lower platen 3 is furnished with magnetic screen fixing groove 14, is formed
The installing space of takeup type magnetic screen 2, the internal diameter size of magnetic screen fixing groove 14 is that the internal diameter size of takeup type magnetic screen 2 subtracts 1mm, external diameter
Size is that the outside dimension of takeup type magnetic screen 2 adds 1mm, and depth is that the thickness of takeup type magnetic screen 2 adds 1mm；Lower platen is furnished with
Low pressure winding is lifted one's head gap 7, is drawn for transformer low voltage Winding tap；Lower platen 3 is furnished with nylon bolt screwed hole 16, screw thread
Depth 20mm, is used for being connected between top board 1 and lower platen 3 using nylon bolt 5.
The high-strength nylon bolt 5, is high-strength nylon material, for top board 1, takeup type magnetic screen 2 and is pushed
Connection top board 1 and lower platen 3 after the completion of plate 3 is combined.The specification of high-strength nylon bolt 5 is M24 bolts, strength nylon bolt 5
Thickness value big 15mm of the spiro rod length than top board 1.High-strength nylon bolt 5 is provided with elongated steam vent 16, and position is along length
Direction centre, bore dia isFor emptying thread portions gap air, it is to avoid because of residual air and caused by electricity
Gas hydraulic performance decline.
Claims (9)
1. a kind of built-in magnetic shielding transformer device body pressing plate, it is characterized in that：Including top board (1), takeup type magnetic screen (2), under
Pressing plate (3) and high-strength nylon bolt (5),
The top board (1) is that grounding copper band perforate (6) and nylon bolt perforate are provided with cirque structure, top board (1)
(10), the inner annular edge of top board (1) is provided with low pressure winding and lifted one's head gap (7), and the bottom of top board (1) is provided with oil guide groove
(9)；Equally distributed oil guiding hole (8), diameter center linear dimension and the winding of oil guide groove (9) are provided with the oil guide groove (9)
The center linear dimension of formula magnetic screen (2) is consistent；
The lower platen (3) is cirque structure, and the top of lower platen (3) is provided with magnetic screen fixing groove (15), lower platen (3)
Inner annular edge be provided with low pressure winding and lift one's head gap (7), be provided with nylon bolt screwed hole (16) on lower platen (3), push
Plate (3) is fixedly connected by high-strength nylon bolt (5) with top board (1)；The internal diameter size of the magnetic screen fixing groove (15)
Than takeup type magnetic screen (2) the small 1mm of internal diameter size, the outside dimension of magnetic screen fixing groove (15) is than takeup type magnetic screen (2)
The big 1mm of outside dimension, the big 1mm of thickness of the depth ratio takeup type magnetic screen (2) of magnetic screen fixing groove (15)；
The takeup type magnetic screen (2) includes grounding copper band (4), winding silicon steel lamellar body (12), the U.S. paper (13) of Nomex promises and epoxy
Resin-cured layer (14), the top of takeup type magnetic screen (2) is connected with top board (1), and the bottom of takeup type magnetic screen (2) passes through
Magnetic screen fixing groove (15) is connected with lower platen (3)；The top of the grounding copper band (4) passes through grounding copper band perforate (6) position afterwards
Top in top board (1), the top of grounding copper band (4) is provided with diameterCircular hole, the bottom of grounding copper band (4)
Welded by soldering with winding silicon steel lamellar body (12)；The winding silicon steel lamellar body (12) is the wide cold-rolled orientation silicon steels of 20mm~40mm
Piece winding is formed, and outer radial dimension big 30mm of the internal diameter size than low pressure winding of winding silicon steel lamellar body (12) winds silicon steel sheet
The outside dimension of body (12) is than the small 80mm of outside dimension of top board (1), and the outside of winding silicon steel lamellar body (12) is provided with epoxy
The epoxy resin cure layer of resin solidification formation；The U.S. paper (13) of the Nomex promises is wrapped in the outer of epoxy resin cure layer (14)
Portion；
The high-strength nylon bolt (5) is connected with nylon bolt screwed hole (16) afterwards through nylon bolt perforate (10), high-strength
Degree nylon bolt (5) is provided with elongated steam vent (17) in centre along its length.
2. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The top board (1)
Thickness be 10mm~20mm.
3. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The lower platen (3)
Thickness be 40mm~80mm.
4. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The grounding copper band
(4) copper strips thick for 0.3mm, wide 40mm.
5. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The high-strength nylon
Thickness value big 15mm of the spiro rod length of bolt (5) than top board (1).
6. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The oil guiding hole (8)
For diameterCircular hole, the spacing between two neighboring oil guiding hole (8) is 100mm~120mm.
7. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The oil guide groove (9)
Width 12mm, depth is 5mm, oil guide groove (9) and the inner ring concentric of lower platen (3).
8. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The nylon bolt spiral shell
The depth of thread of pit (16) is 20mm.
9. a kind of built-in magnetic shielding transformer device body pressing plate according to claim 1, it is characterized in that：The elongated steam vent
(17) bore dia is
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022975.3U CN206363869U (en) | 2017-01-09 | 2017-01-09 | A kind of built-in magnetic shielding transformer device body pressing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022975.3U CN206363869U (en) | 2017-01-09 | 2017-01-09 | A kind of built-in magnetic shielding transformer device body pressing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206363869U true CN206363869U (en) | 2017-07-28 |
Family
ID=59380646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720022975.3U Withdrawn - After Issue CN206363869U (en) | 2017-01-09 | 2017-01-09 | A kind of built-in magnetic shielding transformer device body pressing plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206363869U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783095A (en) * | 2017-01-09 | 2017-05-31 | 成来电气科技有限公司 | A kind of built-in magnetic shielding transformer device body pressing plate |
| CN114034557A (en) * | 2021-11-05 | 2022-02-11 | 青岛亿联建设集团股份有限公司 | Commercial concrete compressive property detection device |
-
2017
- 2017-01-09 CN CN201720022975.3U patent/CN206363869U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783095A (en) * | 2017-01-09 | 2017-05-31 | 成来电气科技有限公司 | A kind of built-in magnetic shielding transformer device body pressing plate |
| CN106783095B (en) * | 2017-01-09 | 2018-04-24 | 成来电气科技有限公司 | A kind of built-in magnetic shielding transformer device body pressing plate |
| CN114034557A (en) * | 2021-11-05 | 2022-02-11 | 青岛亿联建设集团股份有限公司 | Commercial concrete compressive property detection device |
| CN114034557B (en) * | 2021-11-05 | 2023-12-19 | 青岛亿联建设集团股份有限公司 | Commercial concrete compressive property detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170728 Effective date of abandoning: 20180424 |