CN102315004A - Magnetic shielding structure and method of transformer - Google Patents
Magnetic shielding structure and method of transformer Download PDFInfo
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- CN102315004A CN102315004A CN2010102135240A CN201010213524A CN102315004A CN 102315004 A CN102315004 A CN 102315004A CN 2010102135240 A CN2010102135240 A CN 2010102135240A CN 201010213524 A CN201010213524 A CN 201010213524A CN 102315004 A CN102315004 A CN 102315004A
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- magnetic screen
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- cushion block
- iron yoke
- fan
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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 the transformer manufacturing technology, specifically a kind of magnet shielding structure of transformer and method for shielding.
Background technology
At present the used magnetic screen of transformer ' s type product is adopted in the power equipment all is " L " type magnetic screen and the magnetic screen on the fuel tank that is used on the transformer folder; The principle of such magnetic screen is to utilize the high magnetic property of electrical steel strip to constitute 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, technology and the production of folder, fuel tank simultaneously.
Summary of the invention
To the principle of magnet shielding structure in the prior art and the deficiencies such as complexity on the production technology; The present 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, the magnet shielding structure and the method for shielding of the transformer of the complexity in design, technology and the production that reduction folder, fuel tank bring because of magnetic screen.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts 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; Said magnet shielding structure comprises two kinds in fan-shaped and rectangle; All load fan-shaped magnetic screen 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 fan-shaped magnetic screen, and the fan-shaped magnetic screen that both sides stem and middle stem are loaded is symmetric form and distributes; Load the rectangle magnetic screen with fan-shaped magnetic screen antimere on the iron yoke cushion block of both sides stem.
Said 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, in groove, puts into silicon steel sheet as magnetic screen, is fastened on the iron yoke cushion block through insulation board; Ground strip is clipped in the silicon steel sheet, reliably contacts with silicon steel sheet, draws the back and is electrically connected with the transformer folder; Be provided with oil duct cushion block and insulating pad in the space between said magnetic screen and the insulation board; Magnetic screen lamination direction is a radial direction unshakable in one's determination, and fan-shaped magnetic screen lamination direction is a circumferencial direction unshakable in one's determination.
The method for shielding of a kind of transformer of the present invention is characterized in that may further comprise the steps:
Shell with magnetic screen is that iron yoke cushion block is split into the magnetic screen groove earlier;
Again silicon steel sheet is cut into required sheet shape as magnetic screen;
Make and silicon steel sheet sheet shape corresponding insulation plate, oil duct cushion block;
Magnetic screen is folded in the magnetic screen groove, and place ground strip, ground strip is drawn from magnetic screen;
On magnetic screen, put corresponding insulation oil duct and insulation board;
Again insulation board is covered on iron yoke cushion block, accomplish the assembly work of novel magnetic screen.
Said 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 a radial direction unshakable in one's determination, and fan-shaped magnetic screen lamination direction is a circumferencial direction unshakable in one's determination;
After ground strip drawn from magnetic screen, the earth connection of magnetic screen was connected on the folder, and reliably is electrically connected with folder.
The present invention has following beneficial effect and advantage:
1. improve the whole performance level of three-phase three-column transformer ' s type product, effectively reduced leakage flux through metalworks closures such as folder and fuel tanks, and then reduced the loss that increases owing to leakage flux, avoided the local overheating of folder, fuel tank;
1. also reduced the complexity of design, technology and production when ensureing properties of product.
Description of drawings
Fig. 1 is the iron yoke cushion block structural representation of magnetic screen of the present invention;
Fig. 2 is conventional three-phase three-limb transformer flux tendency sketch map;
Fig. 3 is a three-phase three-limb transformer flux tendency sketch map after the application magnetic screen of the present invention;
Fig. 4 is the A-A cutaway view among Fig. 1;
Fig. 5 is the B-B cutaway view among Fig. 1;
Fig. 6 is the D-D cutaway view among Fig. 1;
Fig. 7 is the fan-shaped magnetic screen sketch map of magnetic screen of the present invention;
Fig. 8 is a magnetic screen rectangle magnetic screen sketch map of the present invention.
Wherein: 1 is the rectangle magnetic screen, and 2 is fan-shaped magnetic screen, and 3 is rectangle magnetic screen ground strip, and 4 is fan-shaped magnetic screen ground strip; 5 is iron yoke cushion block, and 6 is insulation board, and 7 is rectangle oil duct cushion block; 8 is the rectangle insulating pad, and 9 is fan-shaped oil duct cushion block, and 10 is fan-shaped insulating pad.
Embodiment
Below in conjunction with accompanying drawing the embodiment of present technique scheme is described in detail.
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 is as shown in Figure 1; Magnet shielding structure comprises two kinds in fan-shaped and rectangle; All load fan-shaped magnetic screen 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 fan-shaped magnetic screen, and the fan-shaped magnetic screen of loading with middle stem is the symmetric form distribution; The both sides stem load the rectangle magnetic screen with the symmetrical position of fan-shaped magnetic screen.
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; In groove, put into silicon steel sheet as magnetic screen, be fastened on the iron yoke cushion block 5 through insulation board 6; Ground strip 3 is clipped in the silicon steel sheet, reliably contacts with silicon steel sheet, draws the back and is electrically connected with the transformer folder; Be provided with oil duct cushion block and insulating pad in the space between magnetic screen and the insulation board 6.
The magnet shielding structure of transformer of the present invention is realized its method for shielding through following steps
1. early-stage preparations: 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) earlier; Again silicon steel sheet is cut into Fig. 7 and the required magnetic screen sheet shape (like Fig. 7, the fan-shaped magnetic screen shown in 8 and rectangle magnetic screen) of Fig. 8, make parts such as insulation board, oil duct cushion block simultaneously;
2. the assembling of magnetic screen: shown in Fig. 4～6; Rectangle magnetic screen, fan-shaped magnetic screen are folded in the magnetic screen groove; And reliably be held on rectangle magnetic screen ground strip 3 (present embodiment adopts the ground connection copper strips) or fan-shaped magnetic screen ground strip 4 in the silicon steel sheet; And from silicon steel sheet (magnetic screen), draw with the transformer folder and be electrically connected, ensure all silicon steel sheets and folder equipotential;
On magnetic screen, put corresponding insulation oil duct cushion block (for Fig. 4, the fan-shaped oil duct cushion block 9 shown in 6 or rectangle oil duct cushion block 7) and insulating pad (for Fig. 4, the fan-shaped insulating pad 10 shown in 6 or rectangle insulating pad 8) again, the oil duct cushion block that insulate be provided for ensureing magnetic screen secure heat dissipation, flat;
Again insulation board 6 is fastened on the iron yoke cushion block 5 at last, accomplishes the assembly work of novel magnetic screen; The magnet shielding structure of the transformer that has assembled is as shown in Figure 1.
Consider the magnetic circuit trend of three-column transformer and the convenience of producing; The magnetic screen of two iron yoke cushion block parts that lean against the outside is designed to rectangle; Magnetic screen lamination direction is a radial direction unshakable in one's determination; Other alternate iron yoke cushion block part magnetic screens are fan-shaped, and magnetic screen lamination direction is a 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 sketch map, and Fig. 3 is the three-phase three-limb transformer flux tendency sketch map behind the 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; Can well leakage flux be imported in the iron core; Effectively reduce leakage flux through metalworks such as folder and fuel tank closure, and then reduced the loss that increases owing 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: said magnet shielding structure comprises two kinds in fan-shaped and rectangle; All load fan-shaped magnetic screen 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 fan-shaped magnetic screen, and the fan-shaped magnetic screen that both sides stem and middle stem are loaded is symmetric form and distributes; Load the rectangle magnetic screen with fan-shaped magnetic screen antimere on the iron yoke cushion block of both sides stem.
2. press the magnet shielding structure of the said transformer of claim 1; It is characterized in that: said magnet shielding structure comprises iron yoke cushion block (5), magnetic screen, 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 shape, in groove, puts into silicon steel sheet as magnetic screen, is fastened on the iron yoke cushion block (5) through insulation board (6); Ground strip (3) is clipped in the silicon steel sheet, reliably contacts with silicon steel sheet, draws the back and is electrically connected with the transformer folder.
3. by the magnet shielding structure of the said transformer of claim 2, it is characterized in that: be provided with oil duct cushion block and insulating pad in the space between said magnetic screen and the insulation board (6).
4. by the magnet shielding structure of the said transformer of claim 1, it is characterized in that: magnetic screen lamination direction is radial direction unshakable in one's determination, and fan-shaped magnetic screen lamination direction is a circumferencial direction unshakable in one's determination.
5. the method for shielding of a transformer is characterized in that may further comprise the steps:
With the shell of magnetic screen is that iron yoke cushion block is split into the magnetic screen groove;
Silicon steel sheet is cut into required sheet shape as magnetic screen;
Make and silicon steel sheet sheet shape corresponding insulation plate, oil duct cushion block;
Magnetic screen is folded in the magnetic screen groove, and place ground strip, ground strip is drawn from magnetic screen;
On magnetic screen, put corresponding insulation oil duct and insulation board;
Insulation board is covered on iron yoke cushion block, accomplish the assembly work of novel magnetic screen.
6. by the said transformer method for shielding of claim 5, it is characterized in that: said shape comprises rectangle and fan-shaped.
7. by the said transformer method for shielding of claim 5; It is characterized in that: it is that magnetic screen is built up the sheet state that magnetic screen is folded in the magnetic screen groove; Vertically be put in the magnetic screen groove, wherein rectangle magnetic screen direction is a radial direction unshakable in one's determination, and fan-shaped magnetic screen lamination direction is a circumferencial direction unshakable in one's determination.
8. by the said transformer method for shielding of claim 5, it is characterized in that: after ground strip was drawn from magnetic screen, the earth connection of magnetic screen was connected on the folder, and reliably is electrically connected with 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 true CN102315004A (en) | 2012-01-11 |
| CN102315004B 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637657A (en) * | 2015-03-12 | 2015-05-20 | 山东电力设备有限公司 | Novel 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750070A (en) * | 1971-11-30 | 1973-07-31 | Westinghouse Electric Corp | Pressure ring for transformer windings |
| 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 |
| 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 |
-
2010
- 2010-06-30 CN CN 201010213524 patent/CN102315004B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750070A (en) * | 1971-11-30 | 1973-07-31 | Westinghouse Electric Corp | Pressure ring for transformer windings |
| 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 |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637657A (en) * | 2015-03-12 | 2015-05-20 | 山东电力设备有限公司 | Novel magnetic shield heat dissipation structure |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102315004B (en) | 2013-06-12 |
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