CN102315004B - Magnetic shielding structure and method of transformer - Google Patents
Magnetic shielding structure and method of transformer Download PDFInfo
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- CN102315004B CN102315004B CN 201010213524 CN201010213524A CN102315004B CN 102315004 B CN102315004 B CN 102315004B CN 201010213524 CN201010213524 CN 201010213524 CN 201010213524 A CN201010213524 A CN 201010213524A CN 102315004 B CN102315004 B CN 102315004B
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Abstract
The invention relates to a magnetic shielding structure and method of a transformer. The magnetic shielding structure is arranged in iron yoke cushion blocks of a three-phase three-column transformer and comprises a sector magnetic shielding structure and a rectangular magnetic shielding structure, the iron yoke cushion block of a middle core column of the three-phase three-column transformer is fully filled with sector magnetic shielding laminated sheets, and the core columns at two sides and the adjacent parts of the middle core column are filled with sector magnetic shields in symmetrical distribution; and the rectangular magnetic shields are filled on the iron yoke cushion blocks of the core columns at two sides and in the symmetrical parts of the sector magnetic shields. The method comprises the steps of: processing magnetic shielding slots on the iron yoke cushion blocks; shearing a silicon steel sheet into a shape as required; manufacturing insulating boards and oil channel cushion blocks; laminating the magnetic shields into the magnetic shielding slots; placing corresponding insulating oil channels and insulating boards on the magnetic shields; and covering the insulating boards on the iron yoke cushion blocks. According to the invention, loss increase caused by leakage magnetic flux is reduced, and clamps and oil tanks are prevented from local overheating.
Description
Technical field
The present invention relates to Transformer Manufacturing Technology, specifically a kind of magnet shielding structure of transformer and method for shielding.
Background technology
At present in power equipment, the magnetic screen used of transformer ' s type product is adopted all for the magnetic screen on apparatus for fixing transformer " L " type magnetic screen and fuel tank, the principle of such magnetic screen is to utilize the high magnetic property of electrical steel strip to consist of the magnetic shunt with low magnetic resistance, making the leakage flux overwhelming majority of transformer no longer closed through metalworks such as folder, fuel tanks, is the principle of basing oneself upon " dredging ".Though reduced the part loss, avoided the local overheating of folder, fuel tank, well do not reduce the leakage flux of transformer, also increased the complexity in design, technique and the production of folder, fuel tank simultaneously.
Summary of the invention
For the principle of magnet shielding structure in prior art and the deficiencies such as complexity on production technology, the invention provides a kind of leakage flux that can be good at reducing the three-phase three-column transformer, avoid the local overheating of folder, fuel tank, magnet shielding structure and the method for shielding of the transformer of the complexity in design, technique and production that reduction folder, fuel tank bring because of magnetic screen.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The magnet shielding structure of a kind of transformer of the present invention, be installed in the top iron yoke cushion block and bottom iron yoke cushion block of three-phase three-column transformer, described magnet shielding structure comprises two kinds, fan-shaped and rectangle, all load sector magnet shielding lamination in the iron yoke cushion block of the middle stem of three-phase three-column transformer, both sides stem and middle stem adjacent regions are loaded the sector magnet shielding, and the sector magnet shielding that both sides stem and middle stem are loaded is symmetric form and distributes; Load the rectangle magnetic screen with sector magnet shielding antimere on the iron yoke cushion block of both sides stem.
Described magnet shielding structure comprises iron yoke cushion block, magnetic screen, insulation board and ground strip, and wherein, iron yoke cushion block is provided with the magnetic screen groove identical with the magnetic screen shape, puts into silicon steel sheet as magnetic screen in groove, is fastened on iron yoke cushion block by insulation board; Ground strip is clipped in silicon steel sheet, reliably contacts with silicon steel sheet, is electrically connected to apparatus for fixing transformer after drawing; Be provided with oil channel cushion block and insulating pad in space between described magnetic screen and insulation board; Magnetic screen lamination direction is radial direction unshakable in one's determination, and sector magnet shielding lamination direction is circumferencial direction unshakable in one's determination.
The method for shielding of a kind of transformer of the present invention is characterized in that comprising the following steps:
First the shell with magnetic screen is that iron yoke cushion block is split into the magnetic screen groove;
Again silicon steel sheet is cut into required sheet shape as magnetic screen;
Make and the corresponding insulation board of silicon steel sheet sheet shape, oil channel cushion block;
Magnetic screen is folded in the magnetic screen groove, and place ground strip, ground strip is drawn from magnetic screen;
Put corresponding insulating oil duct and insulation board on magnetic screen;
Insulation board is covered on iron yoke cushion block again, complete the assembly work of New Magnetic Field Controlled shielding.
Described shape comprises rectangle and fan-shaped;
It is that magnetic screen is built up the sheet state that magnetic screen is folded in the magnetic screen groove, vertically is put in the magnetic screen groove, and wherein rectangle magnetic screen direction is radial direction unshakable in one's determination, and sector magnet shielding lamination direction is circumferencial direction unshakable in one's determination;
After ground strip was drawn from magnetic screen, the earth connection of magnetic screen was connected on folder, and reliably was electrically connected to folder.
The present invention has following beneficial effect and advantage:
1. improve the performance level of three-phase three-column transformer ' s type product integral body, effectively reduced leakage flux closed through metalworks such as folder and fuel tanks, and then reduced the loss that increases due to leakage flux, avoided the local overheating of folder, fuel tank;
1. also reduced the complexity of design, technique and production when ensureing properties of product.
Description of drawings
Fig. 1 is the iron yoke cushion block structure schematic diagram of magnetic screen of the present invention;
Fig. 2 is conventional three-phase three-limb transformer flux tendency schematic diagram;
Fig. 3 is three-phase three-limb transformer flux tendency schematic diagram after application magnetic screen of the present invention;
Fig. 4 is the A-A cutaway view in Fig. 1;
Fig. 5 is the B-B cutaway view in Fig. 1;
Fig. 6 is the D-D cutaway view in Fig. 1;
Fig. 7 is magnetic screen sector magnet shielding schematic diagram of the present invention;
Fig. 8 is magnetic screen rectangle magnetic screen schematic diagram of the present invention.
Wherein: 1 is the rectangle magnetic screen, and 2 are the sector magnet shielding, and 3 is rectangle magnetic screen ground strip, and 4 is sector magnet bonding sheet, 5 is iron yoke cushion block, and 6 is insulation board, and 7 is the rectangle oil channel cushion block, 8 is the rectangle insulating pad, and 9 is fan-shaped oil channel cushion block, and 10 is fan-shaped insulating pad.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to the technical program.
The magnet shielding structure of transformer of the present invention is installed in the top iron yoke cushion block and bottom iron yoke cushion block of three-phase three-column transformer, installation form as shown in Figure 1, magnet shielding structure comprises two kinds, fan-shaped and rectangle, all load the sector magnet shielding in the iron yoke cushion block 5 of the middle stem of three-phase three-column transformer, both sides stem and middle stem adjacent regions are loaded the sector magnet shielding, and the sector magnet shielding of loading with middle stem is the symmetric form distribution; The both sides stem load the rectangle magnetic screen with sector magnet shielding symmetrical position.
As shown in Fig. 4～6, magnet shielding structure comprises iron yoke cushion block 5, magnetic screen, insulation board 6 and ground strip 3, and wherein, iron yoke cushion block 5 is provided with the groove identical with the magnetic screen shape, put into silicon steel sheet as magnetic screen in groove, be fastened on iron yoke cushion block 5 by insulation board 6; Ground strip 3 is clipped in silicon steel sheet, reliably contacts with silicon steel sheet, is electrically connected to apparatus for fixing transformer after drawing; Be provided with oil channel cushion block and insulating pad in space between magnetic screen and insulation board 6.
The magnet shielding structure of transformer of the present invention is realized its method for shielding by following steps
1. early-stage preparations: first the shell with magnetic screen is that iron yoke cushion block 5 is split into the groove identical shaped with magnetic screen (as shown in Figure 1), again silicon steel sheet is cut into the required magnetic screen sheet shape of Fig. 7 and Fig. 8 (sector magnet shielding and rectangle magnetic screen as shown in Fig. 7,8), make simultaneously the parts such as insulation board, oil channel cushion block;
2. the assembling of magnetic screen: as shown in Fig. 4～6, rectangle magnetic screen, sector magnet shielding are folded in the magnetic screen groove, and reliably be held on rectangle magnetic screen ground strip 3 (the present embodiment adopts the ground connection copper strips) or sector magnet bonding sheet 4 in silicon steel sheet, and draw with apparatus for fixing transformer from silicon steel sheet (magnetic screen) and be electrically connected to, ensure all silicon steel sheets and folder equipotential;
Put again corresponding insulating oil duct cushion block (for fan-shaped oil channel cushion block 9 or the rectangle oil channel cushion block 7 shown in Fig. 4,6) and insulating pad (being fan-shaped insulating pad 10 or the rectangle insulating pad 8 shown in Fig. 4,6) on magnetic screen, the insulating oil duct cushion block be provided for ensureing magnetic screen secure heat dissipation, flat;
Again insulation board 6 is fastened on iron yoke cushion block 5 at last, completes the assembly work of New Magnetic Field Controlled shielding; The magnet shielding structure of the transformer that has assembled as shown in Figure 1.
Consider the magnetic circuit trend of three-column transformer and the convenience of producing, the magnetic screen that leans against two iron yoke cushion block parts in the outside is designed to rectangle, magnetic screen lamination direction is radial direction unshakable in one's determination, other alternate iron yoke cushion block part magnetic screens are fan-shaped, magnetic screen lamination direction is circumferencial direction unshakable in one's determination, so effectively in the leakage flux importing iron core with transformer.
Fig. 2 is conventional three-phase three-limb transformer flux tendency schematic diagram, and Fig. 3 is the three-phase three-limb transformer flux tendency schematic diagram after application magnet shielding structure of the present invention.Two figure relatively, obviously magnet shielding structure of the present invention is in the three-phase three-column transformer, leakage flux can well be imported in iron core, effectively reduced leakage flux closed through metalworks such as folder and fuel tanks, and then reduced the loss that increases due to leakage flux, avoided the local overheating of folder, fuel tank.
Claims (8)
1. the magnet shielding structure of a transformer, be installed in the top iron yoke cushion block and bottom iron yoke cushion block of three-phase three-column transformer, it is characterized in that: described magnet shielding structure comprises two kinds, fan-shaped and rectangle, all load sector magnet shielding lamination in the iron yoke cushion block (5) of the middle stem of three-phase three-column transformer, both sides stem and middle stem adjacent regions are loaded sector magnet shielding lamination, and the sector magnet shielding lamination that both sides stem and middle stem are loaded is symmetric form and distributes; Load rectangle magnetic screen lamination with sector magnet shielding lamination antimere on the iron yoke cushion block of both sides stem.
2. press the magnet shielding structure of the described transformer of claim 1, it is characterized in that: described magnet shielding structure comprises iron yoke cushion block (5), magnetic screen lamination, insulation board (6) and ground strip (3), wherein, iron yoke cushion block (5) is provided with the magnetic screen groove identical with the magnetic screen laminate shape, put into silicon steel sheet as the magnetic screen lamination in groove, be fastened on iron yoke cushion block (5) by insulation board (6); Ground strip (3) is clipped in silicon steel sheet, reliably contacts with silicon steel sheet, is electrically connected to apparatus for fixing transformer after drawing.
3. by the magnet shielding structure of the described transformer of claim 2, it is characterized in that: be provided with oil channel cushion block and insulating pad in the space between described magnetic screen lamination and insulation board (6).
4. by the magnet shielding structure of the described transformer of claim 1, it is characterized in that: rectangle magnetic screen lamination direction is radial direction unshakable in one's determination, and sector magnet shielding lamination direction is circumferencial direction unshakable in one's determination.
5. the method for shielding of a transformer is characterized in that comprising the following steps:
Be that iron yoke cushion block is split into the magnetic screen groove with the shell of magnetic screen;
Silicon steel sheet is cut into required sheet shape as the magnetic screen sheet;
Make and the corresponding insulation board of silicon steel sheet sheet shape, oil channel cushion block;
The magnetic screen sheet is folded in the magnetic screen groove, and placed ground strip, ground strip is drawn from the magnetic screen lamination;
Put corresponding insulating oil duct and insulation board on the magnetic screen lamination;
Insulation board is covered on iron yoke cushion block, complete the assembly work of magnetic screen.
6. by the described transformer method for shielding of claim 5, it is characterized in that: described shape comprises rectangle and fan-shaped.
7. by the described transformer method for shielding of claim 5, it is characterized in that: it is that the magnetic screen sheet is built up the sheet state that the magnetic screen sheet is folded in the magnetic screen groove, vertically be put in the magnetic screen groove, wherein rectangle magnetic screen lamination direction is radial direction unshakable in one's determination, and sector magnet shielding lamination direction is circumferencial direction unshakable in one's determination.
8. by the described transformer method for shielding of claim 5, it is characterized in that: after ground strip was drawn from the magnetic screen lamination, the earth connection of magnetic screen was connected on folder, and reliably is electrically connected to folder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010213524 CN102315004B (en) | 2010-06-30 | 2010-06-30 | Magnetic shielding structure and method of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010213524 CN102315004B (en) | 2010-06-30 | 2010-06-30 | Magnetic shielding structure and method of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN102315004A CN102315004A (en) | 2012-01-11 |
| CN102315004B true CN102315004B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010213524 Active CN102315004B (en) | 2010-06-30 | 2010-06-30 | Magnetic shielding structure and method of transformer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637657B (en) * | 2015-03-12 | 2017-03-22 | 山东电力设备有限公司 | Magnetic shield heat dissipation structure |
| CN111029114A (en) * | 2019-12-30 | 2020-04-17 | 山东泰开变压器有限公司 | Magnetic shielding device of large-capacity transformer |
| CN117095915A (en) * | 2023-06-26 | 2023-11-21 | 西安西电变压器有限责任公司 | Iron core, iron core structure and transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750070A (en) * | 1971-11-30 | 1973-07-31 | Westinghouse Electric Corp | Pressure ring for transformer windings |
| CN1866422A (en) * | 2005-05-17 | 2006-11-22 | 特变电工衡阳变压器有限公司 | Magnetic shielding structure for reactor with magnetic core |
| CN201732662U (en) * | 2010-06-30 | 2011-02-02 | 特变电工沈阳变压器集团有限公司 | Magnetic shielding structure of transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59204220A (en) * | 1983-05-06 | 1984-11-19 | Hitachi Ltd | Stationrary induction electric apparatus |
| JPS61224308A (en) * | 1985-03-29 | 1986-10-06 | Toshiba Corp | Gapped core type reactor |
-
2010
- 2010-06-30 CN CN 201010213524 patent/CN102315004B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750070A (en) * | 1971-11-30 | 1973-07-31 | Westinghouse Electric Corp | Pressure ring for transformer windings |
| CN1866422A (en) * | 2005-05-17 | 2006-11-22 | 特变电工衡阳变压器有限公司 | Magnetic shielding structure for reactor with magnetic core |
| CN201732662U (en) * | 2010-06-30 | 2011-02-02 | 特变电工沈阳变压器集团有限公司 | Magnetic shielding structure of transformer |
Non-Patent Citations (2)
| Title |
|---|
| JP昭59-204220A 1984.11.19 |
| JP昭61-224308A 1986.10.06 |
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| CN102315004A (en) | 2012-01-11 |
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