CN209168917U - A kind of low magnetic resistance folder magnetic screen - Google Patents
A kind of low magnetic resistance folder magnetic screen Download PDFInfo
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- CN209168917U CN209168917U CN201920083769.2U CN201920083769U CN209168917U CN 209168917 U CN209168917 U CN 209168917U CN 201920083769 U CN201920083769 U CN 201920083769U CN 209168917 U CN209168917 U CN 209168917U
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- silicon steel
- bottom plate
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- steel sheet
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Abstract
The utility model relates to a kind of low magnetic resistance folder magnetic screens, including L-type bottom plate, multiple L-type silicon steel sheets, two L-type side plates；Multiple L-type silicon steel sheets are welded on L-type bottom plate in thickness direction stack；Two L-type side plates are separately positioned on the two sides of the L-type silicon steel sheet after stack, and are welded on L-type bottom plate；It is welded on folder on the L-type bottom plate.A kind of low magnetic resistance folder magnetic screen of the utility model realizes leakage magnetic flux along silicon steel sheet rolling direction and flows into magnetic screen, reduces magnetic resistance.And leakage magnetic flux is flowed into from silicon steel sheet thickness direction, reduces the eddy-current loss that magnetic screen itself generates；Monolith magnetic screen outer profile is fillet, and without shielding to wedge angle, manufacturing process is simple, and whole width dimensions range of choice is big, the strong applicability on folder.
Description
Technical field
The utility model relates to power transformer fields, more particularly to a kind of low magnetic resistance folder magnetic screen.
Background technique
Power transformer has leakage magnetic flux generation under load operation conditions, these leakage magnetic fluxs can be around in steel structure part
Eddy-current loss is generated, the electric energy efficiency of transmission of transformer is reduced.Folder magnetic screen utilizes the high magnetic property of cold-rolled silicon steel piece, makes
More leakage magnetic fluxs circulate in magnetic screen, to reduce the eddy-current loss in steel structure part.
Cold-reduced silicon sheet, is first cut into the rectangle of needs, stack by existing clamping piece magnetic shielding structure as shown in Figure 4
To after the thickness of needs, it is bent into L shape.Epoxy resin gluing is used between every layer of silicon steel sheet again, then shape after heating cure
At an entirety, leakage magnetic flux is to enter magnetic screen, and every layer of silicon steel from the in-plane (i.e. perpendicular to rolling direction) of silicon steel sheet
There is the epoxy glue layer due to bonding between piece, so magnetic resistance is big, is unfavorable for the inflow of leakage magnetic flux.Simultaneously as leakage magnetic flux
Enter from the in-plane of silicon steel sheet, magnetic screen itself can also generate eddy-current loss；Due to having the presence of bending fillet, every layer of silicon
The length of steel disc is different, and will form wedge angle after bending, other seamed edges of outer profile are also wedge angle, to avoid point discharge,
Wedge angle, seamed edge must be shielded, structure is complicated；Due to having rebound after silicon steel sheet bending, so being needed after gluing when solidified forming
It wants mold to compress, required shape and size could be obtained, production efficiency is low.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of low magnetic resistance folder magnetic screen, leakage magnetic flux is realized
Magnetic screen is flowed into along silicon steel sheet rolling direction, reduces magnetic resistance.And leakage magnetic flux is flowed into from silicon steel sheet thickness direction, reduces magnetic
The eddy-current loss that shielding generates itself；Monolith magnetic screen outer profile is fillet, avoids possible point discharge phenomenon, manufacture
Simple process, whole width dimensions range of choice is big, the strong applicability on folder.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of low magnetic resistance folder magnetic screen, it is wrapped
Include L-type bottom plate, multiple L-type silicon steel sheets, two L-type side plates；Multiple L-type silicon steel sheets are welded on L-type bottom in thickness direction stack
On plate；Two L-type side plates are separately positioned on the two sides of the L-type silicon steel sheet after stack, and are welded on L-type bottom plate；The L-type bottom
Plate is welded on folder.
Multiple L-type silicon steel sheets are in thickness direction stack to the length of required shield ranges.
The lateral surface of L-type silicon steel sheet after stack is provided with insulating lacquer layer.
The lateral surface of left and right two of the L-type bottom plate is provided with the first weld part between folder respectively.
Each angle of the outer profile of the L-type silicon steel sheet is fillet.
The second weld part is provided between the left side and L-type bottom plate of the L-type side plate in left side；The right side of the L-type side plate on right side
The second weld part is provided between side and L-type bottom plate.
The outer lateral edges at the L-type side plate non-solder end are set as fillet.
The both ends of the L-type of the L-type silicon steel sheet are all longer than the both ends of the L-type of L-type bottom plate；The rear end of the L-type silicon steel sheet
Downside, bottom end trailing flank and L-type bottom plate between be respectively arranged with third weld part.
The both ends of the L-type of the L-type silicon steel sheet are all 5-8mm longer than the corresponding both ends of the L-type of L-type bottom plate；For holding
Receive third weld part.
The utility model has the beneficial effects that a kind of low magnetic resistance folder magnetic screen of the utility model, it is suitable to realize leakage magnetic flux
Silicon steel sheet rolling direction flow into magnetic screen, reduce magnetic resistance.And leakage magnetic flux is flowed into from silicon steel sheet thickness direction, reduces magnetic cup
Cover the eddy-current loss itself generated；Monolith magnetic screen outer profile is fillet, without being shielded to wedge angle, manufacturing process letter
Single, whole width dimensions range of choice is big, the strong applicability on folder.
Detailed description of the invention
Fig. 1 is a kind of positive schematic diagram of low magnetic resistance folder magnetic screen of embodiment；
Fig. 2 is a kind of schematic diagram of the side of low magnetic resistance folder magnetic screen of embodiment；
Fig. 3 is the whole positive schematic diagram of a kind of low magnetic resistance folder magnetic screen of embodiment being mounted on folder；
Fig. 4 is the schematic diagram of existing folder magnetic screen.
Specific embodiment
In order to deepen the understanding to the utility model, the utility model is done further below in conjunction with drawings and examples
Detailed description, the embodiment are only used for explaining the utility model, do not constitute and limit to the protection scope of the utility model.
Embodiment
As shown in Figure 1 to Figure 3, a kind of low magnetic resistance folder magnetic screen is present embodiments provided, it includes L-type bottom plate 2, multiple
3, two L-type side plates 4 of L-type silicon steel sheet；Multiple L-type silicon steel sheets 3 are welded in thickness direction stack to the length of required shield ranges
It connects on L-type bottom plate 2；Two L-type side plates 4 are separately positioned on the two sides of the L-type silicon steel sheet 3 after stack, and are welded on L-type bottom plate
On 2；It is welded on folder 1 on the L-type bottom plate 2；The lateral surface of L-type silicon steel sheet 3 after stack is provided with insulating lacquer layer；It is described
2 or so two sides of L-type bottom plate are provided with the first weld part 6 between folder 1 respectively；The outer profile of the L-type silicon steel sheet 3
Each angle be fillet；The second weld part 7 is provided between the left side and L-type bottom plate 2 of the L-type side plate 4 in left side；Right side
The second weld part 7 is provided between the right side and L-type bottom plate 2 of L-type side plate 4；The outer incline at the 4 non-solder end of L-type side plate
While being set as fillet；The both ends of the L-type of the L-type silicon steel sheet 3 are all longer than the both ends of the L-type of L-type bottom plate 2；The L-type silicon steel
Third weld part 8 is respectively arranged between the downside of the rear end of piece 3, the trailing flank of bottom end and L-type bottom plate 2；The L-type silicon steel
Corresponding both ends of the both ends of the L-type of piece 3 all than the L-type of L-type bottom plate 2 are 5-8mm long, for accommodating third weld part.
A kind of low magnetic resistance folder magnetic screen of the present embodiment, each size of the L-type silicon steel sheet is according to transformer capacity
It determines.
A kind of low magnetic resistance folder magnetic screen of the present embodiment, first determines size, then processes L-type bottom plate 2, multiple L
Two L-type side plates 4, are first welded on the two sides of required shield ranges by 3, two L-type side plates 4 of type silicon steel sheet by size, then, will
Stack is between two L-type side plates 4 piecewise for L-type silicon steel sheet 3, until filling consolidation, then will be outside the L-type silicon steel sheet 3 of stack consolidation
It is exposed between the part of L-type bottom plate 2 and L-type bottom plate 2 and welds, then in the lateral surface brushing insulated paint of silicon steel sheet；It will be welded again
Be welded on folder entirely through L-type bottom plate.
A kind of low magnetic resistance folder magnetic screen of the present embodiment realizes leakage magnetic flux along silicon steel sheet rolling direction and flows into magnetic cup
It covers, reduces magnetic resistance.And leakage magnetic flux is flowed into from silicon steel sheet thickness direction, reduces the eddy-current loss that magnetic screen itself generates；It is whole
Block magnetic screen outer profile is fillet, and without shielding to wedge angle, manufacturing process is simple, whole width dimensions range of choice
Greatly, the strong applicability on folder.
Above-described embodiment should not in any way limit the utility model, all by the way of equivalent replacement or equivalency transform
The technical solution of acquisition is all fallen in the protection scope of the utility model.
Claims (8)
1. a kind of low magnetic resistance folder magnetic screen, it is characterised in that: including L-type bottom plate, multiple L-type silicon steel sheets, two L-type side plates；
Multiple L-type silicon steel sheets are welded on L-type bottom plate in thickness direction stack；Two L-type side plates are separately positioned on the L after stack
The two sides of type silicon steel sheet, and be welded on L-type bottom plate；The L-type bottom plate is welded on folder.
2. a kind of low magnetic resistance folder magnetic screen according to claim 1, it is characterised in that: multiple L-type silicon steel sheets are in thickness
Direction stack to required shield ranges length.
3. a kind of low magnetic resistance folder magnetic screen according to claim 1, it is characterised in that: the left and right two of the L-type bottom plate
A lateral surface is provided with the first weld part between folder respectively.
4. a kind of low magnetic resistance folder magnetic screen according to claim 1, it is characterised in that: the foreign steamer of the L-type silicon steel sheet
Wide each angle is fillet.
5. a kind of low magnetic resistance folder magnetic screen according to claim 1, it is characterised in that: the left side of the L-type side plate in left side
The second weld part is provided between face and L-type bottom plate；Second is provided between the right side and L-type bottom plate of the L-type side plate on right side
Weld part.
6. a kind of low magnetic resistance folder magnetic screen according to claim 5, it is characterised in that: the L-type side plate non-solder end
Outer lateral edges be set as fillet.
7. a kind of low magnetic resistance folder magnetic screen according to claim 1, it is characterised in that: the L-type of the L-type silicon steel sheet
Both ends are all longer than the both ends of the L-type of L-type bottom plate；The downside of rear end, the trailing flank of bottom end and the L-type bottom of the L-type silicon steel sheet
Third weld part is respectively arranged between plate.
8. a kind of low magnetic resistance folder magnetic screen according to claim 7, it is characterised in that: the L-type of the L-type silicon steel sheet
Both ends are all 5-8mm longer than the corresponding both ends of the L-type of L-type bottom plate；For accommodating third weld part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083769.2U CN209168917U (en) | 2019-01-18 | 2019-01-18 | A kind of low magnetic resistance folder magnetic screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083769.2U CN209168917U (en) | 2019-01-18 | 2019-01-18 | A kind of low magnetic resistance folder magnetic screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209168917U true CN209168917U (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920083769.2U Active CN209168917U (en) | 2019-01-18 | 2019-01-18 | A kind of low magnetic resistance folder magnetic screen |
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| CN (1) | CN209168917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599256A (en) * | 2019-01-18 | 2019-04-09 | 吴江变压器有限公司 | A kind of low magnetic resistance folder magnetic screen |
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2019
- 2019-01-18 CN CN201920083769.2U patent/CN209168917U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599256A (en) * | 2019-01-18 | 2019-04-09 | 吴江变压器有限公司 | A kind of low magnetic resistance folder magnetic screen |
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