CN202940112U - Strip-shaped magnetic shielding structure - Google Patents
Strip-shaped magnetic shielding structure Download PDFInfo
- Publication number
- CN202940112U CN202940112U CN 201220012494 CN201220012494U CN202940112U CN 202940112 U CN202940112 U CN 202940112U CN 201220012494 CN201220012494 CN 201220012494 CN 201220012494 U CN201220012494 U CN 201220012494U CN 202940112 U CN202940112 U CN 202940112U
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- magnetic screen
- bar shaped
- magnetic shielding
- strip
- shielding structure
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Abstract
The utility model relates to a strip-shaped magnetic shielding structure. The strip-shaped magnetic shielding structure is formed by laminating silicon steel sheets with the thickness of 0.3 mm into a long strip shape with an appropriate width and bonding a paper groove, a paper board with a magnetic shielding body firmly by utilizing glue, so that a magnet-conducting body is formed. The magnetic shielding body is composed of two strips of magnetic shielding pieces or a single strip of magnetic piece. One end of each magnetic shielding piece is welded with one end of a strip of grounding soft copper board. The other end of the grounding soft copper board is provided with a hole used for grounding. At the same time, the grounding soft copper board is wrapped with a layer of semi-laminated crepe paper. By forming a specific magnetic loop, leakage magnetic flux flowing through ferromagnetic material is reduced fundamentally, so that stray losses are reduced, local overheating is avoided and performance indexes and safety operation of a product are guaranteed. The strip-shaped magnetic shielding structure is simple in structure and is convenient and easy to manufacture.
Description
Technical field
The utility model relates to field transformer, especially a kind of bar shaped magnet shielding structure of transformer.
Background technology
Stray field in high-power transformer is by winding current and the common generation of wire current.Stray field and distribution thereof have determined the stray loss of anti-group of the short circuit of transformer, winding mechanical force and structural member, and stray field is concentrated also can cause local overheating.Along with the increase of transformer capacity, inner stray field problem is obviously outstanding.On the one hand, the capacity of transformer is larger, and stray field is stronger, thereby the various supplementary load loss that the stable state stray field causes are increased.On the other hand, stray field is concentrated and also will be caused the transformer part overheated, causes the insulating material heat ageing, the cracking that transformer oil occurs with the problem such as puncture, affect transformer reliability of operation and life-span.
The utility model content
In order to solve eddy current loss and the local overheating problem that is caused by leakage flux, the utility model provides a kind of bar shaped magnet shielding structure for the device body, and it fundamentally reduces the leakage flux of the ferromagnetic material of flowing through by forming specific magnetic loop, thereby reduction stray loss is avoided local overheating.
In order to solve the problems of the technologies described above, the utility model bar shaped magnet shielding structure is to be built up the elongate in shape of proper width by the silicon steel sheet that thickness is 0.3mm, and paper groove, cardboard and magnetic screen is glued, and makes it become a magnetic conductor.Magnetic screen is comprised of two magnetic screens or wall scroll magnetic screen.An end in each magnetic screen all welds a ground connection soft copper plate, and the other end perforate of ground connection soft copper plate is used for ground connection, simultaneously ground connection soft copper plate outsourcing crimped paper half lap one deck.
The bar shaped magnetic screen is placed on folder, effectively guides leakage field by upper and lower magnetic screen, farthest reduces loss and local overheating that leakage field causes, to guarantee performance index and the safe operation of product.
Upper clamping piece magnetic screen: at first weld support plate on folder, then with wooden part, the bar shaped magnetic screen is held up, and be clamped on support plate.
The lower clamping piece magnetic screen: the bar shaped magnetic screen of high and low depressor body bottom is fixed on the iron yoke cushion block of device body insulation.
The bar shaped magnetic screen is applicable to single-phase four posts or three-phase transformer, guides leakage field to form the closed-loop path by magnetic screen.
The beneficial effects of the utility model are: by forming specific magnetic loop, fundamentally reduce the leakage flux of the ferromagnetic material of flowing through, thereby reduce stray loss, avoid local overheating, guarantee performance index and the safe operation of product, it is simple in structure, convenient, easily implements.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the magnet shielding structure schematic diagram that two magnetic screens form.
Fig. 2 is the magnet shielding structure schematic diagram that the wall scroll magnetic screen forms.
Fig. 3 is upper clamping piece bar shaped magnetic screen placement figure.
Fig. 4 is lower clamping piece bar shaped magnetic screen placement figure.
1. silicon steel sheets in figure, 2. paper groove, cardboard, 3. ground connection soft copper plate, 4. bar shaped magnetic screen.
Embodiment
Be to be built up the elongate in shape of proper width by the silicon steel sheet (1) that thickness is 0.3mm, and paper groove, cardboard (2) are glued with magnetic screen, make it become a magnetic conductor.Magnetic screen is comprised of two magnetic screens (seeing Fig. 1) or wall scroll magnetic screen (seeing Fig. 2).An end in each magnetic screen all welds a ground connection soft copper plate (3), and the other end perforate of ground connection soft copper plate (3) is used for ground connection, simultaneously ground connection soft copper plate (3) outsourcing crimped paper half lap one deck.
Bar shaped magnetic screen (4) is placed on folder, effectively guides leakage field by upper and lower magnetic screen.
Upper clamping piece magnetic screen: at first weld support plate on folder, then use wooden part that bar shaped magnetic screen (4) is held up, and be clamped on support plate, as shown in Figure 3.
The lower clamping piece magnetic screen: the bar shaped magnetic screen (4) of high and low depressor body bottom is fixed on the iron yoke cushion block of device body insulation, as shown in Figure 4.
Claims (4)
1. bar shaped magnet shielding structure, it is the silicon steel sheet stack strip shape of 0.3mm by thickness, and paper groove, cardboard and magnetic screen are glued, make it become a magnetic conductor, it is characterized in that: magnetic screen is comprised of two magnetic screens or wall scroll magnetic screen, an end in each magnetic screen all welds a ground connection soft copper plate, and the other end perforate of ground connection soft copper plate is used for ground connection, simultaneously ground connection soft copper plate outsourcing crimped paper half lap one deck.
2. bar shaped magnet shielding structure according to claim 1, it is characterized in that: the bar shaped magnetic screen is placed on folder, effectively guides leakage field by upper and lower magnetic screen, farthest reduces loss and local overheating that leakage field causes.
3. bar shaped magnet shielding structure according to claim 2, it is characterized in that: described upper clamping piece magnetic screen is to weld support plate on folder, then with wooden part, the bar shaped magnetic screen is held up, and is clamped on support plate.
4. bar shaped magnet shielding structure according to claim 2 is characterized in that: described lower clamping piece magnetic screen is that the bar shaped magnetic screen of high and low depressor body bottom is fixed on the iron yoke cushion block of device body insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220012494 CN202940112U (en) | 2012-01-12 | 2012-01-12 | Strip-shaped magnetic shielding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220012494 CN202940112U (en) | 2012-01-12 | 2012-01-12 | Strip-shaped magnetic shielding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940112U true CN202940112U (en) | 2013-05-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220012494 Expired - Fee Related CN202940112U (en) | 2012-01-12 | 2012-01-12 | Strip-shaped magnetic shielding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202940112U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442543A (en) * | 2013-08-19 | 2013-12-11 | 长春轨道客车股份有限公司 | Electromagnetic compatibility shield plate for city railway vehicle |
| CN105118611A (en) * | 2015-07-13 | 2015-12-02 | 国家电网公司 | Method for reducing partial heating of transformer shell |
| CN106252048A (en) * | 2016-08-31 | 2016-12-21 | 卧龙电气集团股份有限公司 | A kind of magnet shielding structure being applied to supertension autotransformer folder |
| CN106373762A (en) * | 2016-10-26 | 2017-02-01 | 山东电力设备有限公司 | Transformer capable of controlling magnetic flux leakage |
| CN109273221A (en) * | 2018-11-29 | 2019-01-25 | 山东达驰电气有限公司 | A kind of magnet shielding structure of transformer |
| CN110085403A (en) * | 2019-05-21 | 2019-08-02 | 保定天威保变电气股份有限公司 | A kind of transformer three-limb core end magnet shielding structure and its method for shielding |
| 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 |
-
2012
- 2012-01-12 CN CN 201220012494 patent/CN202940112U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442543A (en) * | 2013-08-19 | 2013-12-11 | 长春轨道客车股份有限公司 | Electromagnetic compatibility shield plate for city railway vehicle |
| CN105118611A (en) * | 2015-07-13 | 2015-12-02 | 国家电网公司 | Method for reducing partial heating of transformer shell |
| CN106252048A (en) * | 2016-08-31 | 2016-12-21 | 卧龙电气集团股份有限公司 | A kind of magnet shielding structure being applied to supertension autotransformer folder |
| CN106373762A (en) * | 2016-10-26 | 2017-02-01 | 山东电力设备有限公司 | Transformer capable of controlling magnetic flux leakage |
| CN106373762B (en) * | 2016-10-26 | 2019-02-22 | 山东输变电设备有限公司 | A kind of transformer controlling leakage field |
| CN109273221A (en) * | 2018-11-29 | 2019-01-25 | 山东达驰电气有限公司 | A kind of magnet shielding structure of transformer |
| CN110085403A (en) * | 2019-05-21 | 2019-08-02 | 保定天威保变电气股份有限公司 | A kind of transformer three-limb core end magnet shielding structure and its method for shielding |
| CN110085403B (en) * | 2019-05-21 | 2024-04-26 | 保定天威保变电气股份有限公司 | Magnetic shielding structure and magnetic shielding method for end part of three-post iron core of transformer |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20140112 |