CN107516589B - A kind of anti-overheat magnetic shielding device and method for shielding of transformer winding end - Google Patents
A kind of anti-overheat magnetic shielding device and method for shielding of transformer winding end Download PDFInfo
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- CN107516589B CN107516589B CN201710925060.8A CN201710925060A CN107516589B CN 107516589 B CN107516589 B CN 107516589B CN 201710925060 A CN201710925060 A CN 201710925060A CN 107516589 B CN107516589 B CN 107516589B
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- shielding cover
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- Regulation Of General Use Transformers (AREA)
Abstract
本发明公开了一种变压器绕组端部的防过热磁屏蔽装置及磁屏蔽方法，解决了变压器绕组端部容易发生过热现象的问题。包括在变压器绕组端部铁芯（1）上间隔地设置有变压器绕组端部上层环形支架（2）、变压器绕组端部中层环形支架（3）和变压器绕组端部下层环形支架（4），在变压器绕组端部中层环形支架（3）上分别设置有左中销轴（5）和右中销轴（6），在左中销轴（5）上铰接有半环形左中磁屏蔽罩（7），在右中销轴（6）上铰接有半环形右中磁屏蔽罩（8）；在变压器绕组端部下层环形支架（4）上分别设置有半环形左下磁屏蔽罩（11）和半环形右下磁屏蔽罩（12）。有效避免了磁屏蔽装置本身过热而引发的故障。
The invention discloses a magnetic shielding device for preventing overheating of a winding end of a transformer and a magnetic shielding method, which solves the problem that the winding end of the transformer is prone to overheating. The transformer winding end iron core (1) is provided with an upper layer annular support (2) at the transformer winding end, a middle layer annular support (3) at the transformer winding end and a lower annular support (4) at the transformer winding end. A left middle pin shaft (5) and a right middle pin shaft (6) are respectively arranged on the middle layer annular support (3) at the end of the transformer winding, and a semi-ring left middle magnetic shield (7) is hinged on the left middle pin shaft (5). ), a half-ring right middle magnetic shield (8) is hinged on the right middle pin (6); a half-ring lower left magnetic shield (11) and a half-ring lower left magnetic shield (11) and a half-ring lower left magnetic shield (11) and a half-ring lower left magnetic shield (11) and a half-ring lower left magnetic shield (11) and a half-ring lower left magnetic shield (11) and half Ring lower right magnetic shield (12). The failure caused by overheating of the magnetic shielding device itself is effectively avoided.
Description
Technical field
The present invention relates to a kind of magnetic shielding device, in particular to a kind of magnetic shielding device of transformer winding end.
Background technique
In transformer station high-voltage side bus, due to the structural relation of transformer, the general flux density in transformer winding end is all bigger, becomes
The leakage field of depressor winding overhang is more, these leakage fields usually can generate whirlpool on the components such as the pulling plate of transformer winding end and folder
Stream, and these vortex will lead to the components such as pulling plate and folder and superheating phenomenon occur, and directly influence the normal operation of transformer.
In order to overcome this vortex phenomenon, the prior art is to place magnetic shield panel for shielded transformer winding in transformer winding end
The leakage field of end, but although this means realize the magnetic screen to components such as pulling plate and folders, but in magnetic shield panel in operation
On can still generate a large amount of vortex, so that magnetic shield panel is generated heat, which still can by being thermally conducted on the components such as pulling plate and folder
Cause the hot-spot phenomenon of transformer winding end.
Summary of the invention
The present invention provides the anti-overheat magnetic shielding devices and method for shielding of a kind of transformer winding end, solve change
The technical issues of depressor winding overhang is easy to happen superheating phenomenon.
The present invention is to solve the above technical problem by the following technical programs:
A kind of anti-overheat magnetic shielding device of transformer winding end, including transformer winding end iron core, in transformer
Transformer winding end upper layer ring support, transformer winding end middle layer annular branch have been positioned apart from winding overhang iron core
Frame and transformer winding end lower layer ring support, are respectively arranged with left pin on the ring support of transformer winding end middle layer
Pin shaft in axis and the right side, is hinged with the left magnetic shielding cover of semi-circular on left pin shaft, is hinged with the semi-circular right side on pin shaft in the right side
Middle magnetic shielding cover；It is respectively arranged with lower-left pin shaft and bottom right pin shaft on transformer winding end lower layer ring support, in lower-left
It is hinged with semi-circular lower-left magnetic shielding cover on pin shaft, semi-circular bottom right magnetic shielding cover is hinged on the pin shaft of bottom right.
On the lateral surface of the left magnetic shielding cover of semi-circular, in the semi-circular right side on the lateral surface of magnetic shielding cover, semi-circular it is left
On the lateral surface of lower magnetic shielding cover and handle is provided on the lateral surface of semi-circular bottom right magnetic shielding cover.
A kind of anti-overheat method for shielding of transformer winding end, comprising the following steps:
Pin shaft in left pin shaft and the right side is respectively set on the ring support of transformer winding end middle layer in the first step, on a left side
The left magnetic shielding cover of hinged semi-circular on middle pin shaft, the magnetic shielding cover in the hinged semi-circular right side on pin shaft in the right side；Transformer around
Lower-left pin shaft and bottom right pin shaft is respectively set on group end lower layer ring support, the hinged semi-circular lower-left magnetic cup on the pin shaft of lower-left
Cover is covered, semi-circular bottom right magnetic shielding cover is hinged on the pin shaft of bottom right；
Magnetic shielding cover in the left magnetic shielding cover of semi-circular and the semi-circular right side is closed, shading ring on composition by second step；
Third step, when second step upper shading ring occur superheating phenomenon when, first by semi-circular lower-left magnetic shielding cover and semi-ring
Magnetic shielding cover closure in shape bottom right forms lower shading ring, then, by magnetic shielding cover in the left magnetic shielding cover of semi-circular and the semi-circular right side
It opens, radiates away from transformer winding end；
4th step, the lower shading ring composed by the semi-circular lower-left magnetic shielding cover and semi-circular bottom right magnetic shielding cover occurred
When hot, magnetic shielding cover in the left magnetic shielding cover of semi-circular and the semi-circular right side is closed, then by semi-circular lower-left magnetic shielding cover and partly
The lower shading ring of annular bottom right magnetic shielding cover composition is opened.
The present invention passes through the double-deck magnetic masking layer interaction operation, allows shielded layer to take turns flow heat dissipation, effectively prevents magnetic cup
Cover the failure that device itself overheats and causes.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing:
A kind of anti-overheat magnetic shielding device of transformer winding end, including transformer winding end iron core 1, in transformer
Transformer winding end upper layer ring support 2, transformer winding end middle layer annular have been positioned apart from winding overhang iron core 1
Bracket 3 and transformer winding end lower layer ring support 4, are respectively arranged on transformer winding end middle layer ring support 3
Pin shaft 6 in left pin shaft 5 and the right side, is hinged with the left magnetic shielding cover 7 of semi-circular on left pin shaft 5, hinged on pin shaft 6 in the right side
There is magnetic shielding cover 8 in the semi-circular right side；Lower-left pin shaft 9 and the right side are respectively arranged on transformer winding end lower layer ring support 4
Lower bearing pin 10 is hinged with semi-circular lower-left magnetic shielding cover 11 on lower-left pin shaft 9, and the semi-circular right side is hinged on bottom right pin shaft 10
Lower magnetic shielding cover 12.
On the lateral surface of the left magnetic shielding cover 7 of semi-circular, semi-circular the right side in magnetic shielding cover 8 lateral surface on, semi-circular
On the lateral surface of lower-left magnetic shielding cover 11 and handle 13 is provided on the lateral surface of semi-circular bottom right magnetic shielding cover 12.
A kind of anti-overheat method for shielding of transformer winding end, comprising the following steps:
Pin shaft 6 in left pin shaft 5 and the right side is respectively set on transformer winding end middle layer ring support 3 in the first step,
The left magnetic shielding cover 7 of hinged semi-circular on left pin shaft 5, the magnetic shielding cover 8 in the hinged semi-circular right side on pin shaft 6 in the right side；Becoming
Lower-left pin shaft 9 and bottom right pin shaft 10 is respectively set on depressor winding overhang lower layer ring support 4, hinged half on lower-left pin shaft 9
Annular lower-left magnetic shielding cover 11 is hinged with semi-circular bottom right magnetic shielding cover 12 on bottom right pin shaft 10；
Magnetic shielding cover 8 in the left magnetic shielding cover 7 of semi-circular and the semi-circular right side is closed, shading ring on composition by second step；
Third step, when superheating phenomenon occurs for the upper shading ring of second step, first by semi-circular lower-left magnetic shielding cover 11 and half
Annular bottom right magnetic shielding cover 12 is closed, and forms lower shading ring, then, by magnetic in the left magnetic shielding cover 7 of semi-circular and the semi-circular right side
Shielding case 8 is opened, and is radiated away from transformer winding end；
4th step, the lower shading ring hair composed by the semi-circular lower-left magnetic shielding cover 11 and semi-circular bottom right magnetic shielding cover 12
When raw overheat, magnetic shielding cover 8 in the left magnetic shielding cover 7 of semi-circular and the semi-circular right side is closed, then by the magnetic screen of semi-circular lower-left
The lower shading ring that cover 11 and semi-circular bottom right magnetic shielding cover 12 form is opened；
On the left magnetic shielding cover 7 of semi-circular, in the semi-circular right side on magnetic shielding cover 8, on semi-circular lower-left magnetic shielding cover 11
Leakage field is absorbed with silicon steel bar spaced arrangement is provided on semi-circular bottom right magnetic shielding cover 12, reaches the same of Magnetic Shielding Effectiveness
When, also reduce eddy-current loss.
Claims (1)
1. a kind of anti-overheat method for shielding of transformer winding end, comprising the following steps:
Left pin shaft (5) He Youzhong pin shaft (6) is respectively set in the first step on transformer winding end middle layer ring support (3),
The hinged left magnetic shielding cover of semi-circular (7) on left pin shaft (5), the magnetic screen in the hinged semi-circular right side on pin shaft (6) in the right side
It covers (8)；Lower-left pin shaft (9) and bottom right pin shaft (10) are respectively set on transformer winding end lower layer ring support (4), on a left side
Hinged semi-circular lower-left magnetic shielding cover (11), is hinged with the magnetic screen of semi-circular bottom right on bottom right pin shaft (10) on lower bearing pin (9)
It covers (12)；
Magnetic shielding cover (8) in the left magnetic shielding cover of semi-circular (7) and the semi-circular right side is closed, shading ring on composition by second step；
Third step, when second step upper shading ring occur superheating phenomenon when, first by semi-circular lower-left magnetic shielding cover (11) and semi-ring
Shape bottom right magnetic shielding cover (12) closure forms lower shading ring, then, will be in the left magnetic shielding cover of semi-circular (7) and the semi-circular right side
Magnetic shielding cover (8) is opened, and is radiated away from transformer winding end；
4th step, the lower shading ring hair composed by the semi-circular lower-left magnetic shielding cover (11) and semi-circular bottom right magnetic shielding cover (12)
When raw overheat, by magnetic shielding cover (8) closure in the left magnetic shielding cover of semi-circular (7) and the semi-circular right side, then by semi-circular lower-left magnetic
The lower shading ring of shielding case (11) and semi-circular bottom right magnetic shielding cover (12) composition is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710925060.8A CN107516589B (en) | 2017-10-02 | 2017-10-02 | A kind of anti-overheat magnetic shielding device and method for shielding of transformer winding end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710925060.8A CN107516589B (en) | 2017-10-02 | 2017-10-02 | A kind of anti-overheat magnetic shielding device and method for shielding of transformer winding end |
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| Publication Number | Publication Date |
|---|---|
| CN107516589A CN107516589A (en) | 2017-12-26 |
| CN107516589B true CN107516589B (en) | 2019-04-16 |
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| CN201710925060.8A Active CN107516589B (en) | 2017-10-02 | 2017-10-02 | A kind of anti-overheat magnetic shielding device and method for shielding of transformer winding end |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625377A (en) * | 2009-08-14 | 2010-01-13 | 河南电力试验研究院 | High-accuracy open type Rogowski coil |
| CN106057440A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | Local-overheating cooling device for end portion of dry type transformer winding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20101454U1 (en) * | 2001-01-27 | 2001-05-23 | Phoenix Contact Gmbh & Co., 32825 Blomberg | Circuit board-based current sensor |
| US7105952B2 (en) * | 2003-10-03 | 2006-09-12 | Soft Switching Technologies Corporation | Distributed floating series active impendances for power transmission systems |
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2017
- 2017-10-02 CN CN201710925060.8A patent/CN107516589B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625377A (en) * | 2009-08-14 | 2010-01-13 | 河南电力试验研究院 | High-accuracy open type Rogowski coil |
| CN106057440A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | Local-overheating cooling device for end portion of dry type transformer winding |
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| CN107516589A (en) | 2017-12-26 |
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