CN206282708U - A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder - Google Patents
A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder Download PDFInfo
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- CN206282708U CN206282708U CN201621024051.9U CN201621024051U CN206282708U CN 206282708 U CN206282708 U CN 206282708U CN 201621024051 U CN201621024051 U CN 201621024051U CN 206282708 U CN206282708 U CN 206282708U
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Abstract
A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder, is related to a kind of magnet shielding structure.Leakage flux between super-pressure auto-transformer its inside and outside winding is high, is not enough to effective reduce loss using usual way, eliminates the hidden danger of hot-spot.The utility model includes the fastener of bending magnetic shield, the first insulating pad, connection bending magnetic shield and the first insulating pad to folder, and described bending magnetic shield cross section is in " L ", bending part arc transition；Described bending magnetic shield is located at the outer end of folder.The technical program installs " L " type bending bending magnetic shield additional by the outer end of the larger folder of leakage field flux density, reduces leakage magnetic flux into non magnetic folder, can be effectively reduced the added losses of leakage magnetic flux generation.
Description
Technical field
The utility model is related to a kind of magnet shielding structure, more particularly to a kind of super-pressure auto-transformer folder of being applied to
Magnet shielding structure.
Background technology
Magnetic screen is made up of the good silicon steel sheet multilayer stack of magnetic property.Position difference is shielded according to it and is generally divided into oil
Case magnetic screen, folder magnetic screen etc..Magnetic screen is generally used for high voltage, high-power transformer.Because such stray transformer flux is close
Degree accounts for the large percentage of main flux density, and leakage magnetic flux through steel matter folder when can produce eddy-current loss and magnetic hystersis loss,
Further result in folder heating.Usual 220KV and following product make related folder, limb using low magnetic conduction or non magnetic steel plate
Leakage flux between plate etc., but super-pressure auto-transformer its inside and outside winding is up to the 30% ~ 40% of main flux density, and it brings
Loss account for the 30% ~ 50% of basic copper loss, using usual way be not enough to effective reduce loss, eliminate hot-spot it is hidden
Suffer from.
Utility model content
The technical problems to be solved in the utility model and propose technical assignment be to prior art carry out improve with
Improve, there is provided a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder, to reduce the additional damage of leakage magnetic flux generation
For the purpose of consumption.Therefore, the utility model takes following technical scheme.
A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder, including bending magnetic shield, the first insulation
Backing plate, the fastener for connecting bending magnetic shield and the first insulating pad to folder, described bending magnetic shield cross section is in
" L ", bending part arc transition；Described bending magnetic shield is located at the outer end of folder.By larger in leakage field flux density
The outer end of folder installs " L " type bending bending magnetic shield additional, reduces leakage magnetic flux into non magnetic folder, can effectively drop
The added losses that low drain magnetic flux is produced.
Used as further improving and supplementing to above-mentioned technical proposal, the utility model also includes that following supplementary technology is special
Levy.
Also include straight magnetic shield, described straight magnetic shield is stacked with one side of bending magnetic shield, described straight magnetic
It is overall that shielding part, bending magnetic shield, the first insulating pad are connected as one by fastener and folder.By increasing and bending magnetic
The stacked straight magnetic shield in one side of shielding part, can preferably reduce leakage magnetic flux into non magnetic folder.
The thickness of described bending magnetic shield is 8-12mm；Highly it is 220-240mm.The size can cover folder
The larger position of outer end leakage field flux density.
Described bending magnetic shield is provided with the first connecting hole, the second connecting hole, described the first connecting hole, the second connection
Hole is respectively arranged on two orthogonal flat boards of " L " type bending magnetic shield, the first described connecting hole and/or second
Connecting hole is mounting hole.On two pieces of orthogonal flat boards of " L " type, it is easy to be connected by connecting hole, kidney-shaped
The slight regulation of fastener locations is easy in the setting in hole.
Described fastener includes the first fastener, the second fastener, and the first described connecting hole wears the first fastener,
The second described connecting hole wears the second fastener, and the first fastener is arranged in the end sides of folder, and the second fastener wears
In the end end face of folder.By the first fastener, the second fastener is mutually perpendicular is anchored on folder, can stablize
Magnet shielding structure is firmly fixed.
Described straight magnetic shield is located between bending magnetic shield and the first insulating pad.Set by straight magnetic shield
In bending magnetic shield inner side, the corner of magnet shielding structure is safer without acute angle.
The first described fastener includes bending magnetic shield, straight magnetic shield and the first interior insulation backing plate to be fastened on folder
Bolt and the first packing ring on part, the first external insulation backing plate between bending magnetic shield and the first packing ring, it is embedded at
Insulating washer in one connecting hole, the insulation pillar between insulating washer and bolt, described pipe range of insulation pillar etc.
In the distance between folder and the first packing ring.By the insulating structure design to the first fastener, can play well absolutely
Edge effect.
The second described fastener include insulation blanket stud, second packing ring, nut and located at bending magnetic shield and yoke screen it
Between the second external insulation backing plate, insulation blanket stud ecto-entad sequentially pass through yoke screen, the second external insulation backing plate, bending magnetic shield,
It is attached at the second interior insulation backing plate of folder end end face and is fixed on the end of folder.By the second fastening using insulation
Part, can reduce the electric leakage leakage field phenomenon between folder and bending magnetic shield.
First external insulation backing plate, the second external insulation backing plate are epoxy novolac cardboard；In first interior insulation backing plate and second absolutely
Edge backing plate, insulating washer are laminated paper plate；Described insulation pillar is sulfate pulp profiled member.Epoxy novolac cardboard, layer
Platen plate, sulfate pulp profiled member cost are relatively low, are easily worked manufacture, and good insulating.
Described bending magnetic shield is stacked by after multi-disc identical silicon steel sheet bending, and straight magnetic shield is by multi-disc identical
Silicon steel sheet stacking is formed, and is brought into close contact between adjacent two panels silicon steel sheet.It is brought into close contact by silicon steel sheet and is fabricated to magnetic shield, is led
Magnetic property more preferably, can preferably reduce leakage magnetic flux into non magnetic folder.
Beneficial effect：The magnet shielding structure part made by silicon steel sheet is installed additional by the larger position of leakage field flux density, lead
Magnetic property is good, reduces leakage magnetic flux into non magnetic folder, corresponding to reduce the added losses that leakage magnetic flux is produced, and improves transformer
Photoelectric transformation efficiency, reduces the accident rate that hot-spot triggers, and improves the economic benefit of transformer.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model bending magnetic shield structural representation.
Fig. 3 is that the utility model bending magnetic shield launches plan.
Fig. 4 is the straight magnetic shield structural representation of the utility model.
In figure：1- folders；2- bending magnetic shields；The straight magnetic shields of 3-；4- the first interior insulation backing plates；The interior insulations of 5- second
Backing plate；6- the first external insulation backing plates；7- the second external insulation backing plates；8- insulation blanket studs；9- nuts；10- second packing rings；11- insulate
Packing ring；12- insulation pillars；13- bolts；The packing rings of 14- first；15- yoke screens；The connecting holes of 201- first；The connecting holes of 202- second.
Specific embodiment
The technical solution of the utility model is described in further detail below in conjunction with Figure of description.
As Figure 1-4, the utility model includes bending magnetic shield 2, the first interior insulation backing plate 4, connection bending magnetic cup
The interior insulation backing plate 4 of shield 2 and first to folder 1 fastener, the cross section of bending magnetic shield 2 be in " L ", bending part circular arc mistake
Cross；Bending magnetic shield 2 is located at the outer end of folder 1.Installed additional " L " by the outer end of the larger folder 1 of leakage field flux density
Type bending bending magnetic shield 2, reduces leakage magnetic flux into non magnetic folder 1, can be effectively reduced the attached of leakage magnetic flux generation
Plus loss.
In order to preferably reduce leakage magnetic flux into non magnetic folder 1, also including straight magnetic shield 3, straight magnetic shield 3 and folding
One side of curved magnetic shield 2 is stacked, and straight magnetic shield 3, bending magnetic shield 2, the first interior insulation backing plate 4 are by fastener and folder
It is overall that part 1 is connected as one.By increasing the straight magnetic shield 3 stacked with one side of bending magnetic shield 2, can preferably reduce
Leakage magnetic flux enters non magnetic folder 1.
The position larger in order to cover leakage field flux density, the thickness of bending magnetic shield 2 is 8-12mm；Highly it is
220-240mm.The size can cover the larger position of outer end leakage field flux density of folder 1.
For the ease of the position adjustments of fastener, bending magnetic shield 2 is provided with the first connecting hole 201, the second connecting hole
202, the first connecting hole 201, the second connecting hole 202 are respectively arranged on two orthogonal flat boards of " L " type bending magnetic shield 2
On, the first connecting hole 201 and/or the second connecting hole 202 are mounting hole.Mutually hung down by two pieces connecting hole located at " L " type
On straight flat board, it is easy to be connected, the slight regulation of fastener locations is easy in the setting of mounting hole.
In order to magnet shielding structure is firmly fixed, fastener includes the first fastener, the second fastener, the first connecting hole
201 wear the first fastener, and the second connecting hole 202 wears the second fastener, and the first fastener is arranged in the end side of folder 1
Face, the second fastener is arranged in the end end face of folder 1.By the first fastener, the mutually perpendicular fastening of the second fastener
In on folder 1, what can be stablized is firmly fixed magnet shielding structure.
In order to lift security, straight magnetic shield 3 is between the interior insulation backing plate 4 of bending magnetic shield 2 and first.Pass through
Straight magnetic shield 3 located at the inner side of bending magnetic shield 2, the corner of magnet shielding structure is safer without acute angle.
In order to play preferable insulation effect, the first fastener is included bending magnetic shield 2, straight magnetic shield 3 and the
One interior insulation backing plate 4 is fastened on the packing ring 14 of bolt 13 and first on folder 1, located at the packing ring 14 of bending magnetic shield 2 and first
Between the first external insulation backing plate 6, be embedded in the first connecting hole 201 insulating washer 11, located at insulating washer 11 and bolt
Insulation pillar 12 between 13, the pipe range of the pillar 12 that insulate is equal to the distance between packing ring 14 of folder 1 and first.By to first
The insulating structure design of fastener, can play good insulation effect.
In order to reduce electric leakage leakage field phenomenon, the second fastener includes insulation blanket stud 8, second packing ring 10, nut 9 and located at folding
The second external insulation backing plate 7 between curved magnetic shield 2 and yoke screen 15, the ecto-entad of insulation blanket stud 8 sequentially passes through yoke screen 15, second
External insulation backing plate 7, bending magnetic shield 2, the second interior insulation backing plate 5 for being attached at folder end end face are simultaneously fixed on folder 1
End.By the way that the second fastener using insulation, the electric leakage leakage field that can be reduced between folder 1 and bending magnetic shield 2 shows
As
In order to realize insulation effect and be easy to manufacture, the first external insulation backing plate 6, the second external insulation backing plate 7 are epoxy novolac
Cardboard；First interior insulation backing plate 4 and the second interior insulation backing plate 5, insulating washer 11 are laminated paper plate；Insulation pillar 12 is sulfuric acid
Salt paper pulp molding part.Epoxy novolac cardboard, laminated paper plate, sulfate pulp profiled member cost are relatively low, are easily worked manufacture, and
And good insulating.
In order to preferably reduce leakage magnetic flux into non magnetic folder 1, bending magnetic shield 2 is rolled over by 5 identical silicon steel sheets
Stacking after curved, straight magnetic shield 3 is formed by 5 identical silicon steel sheet stackings, is brought into close contact between adjacent two panels silicon steel sheet.Pass through
Silicon steel sheet is brought into close contact and is fabricated to magnetic shield, and magnetic property more preferably, can preferably reduce leakage magnetic flux into non magnetic folder
1。
When magnet shielding structure is installed, first the end lateral surface in folder 1 is sticked the first interior insulation backing plate 4, at the end of folder 1
The end face side in portion is sticked the second interior insulation backing plate 5, and straight magnetic shield 3 is attached at the lateral surface of the first interior insulation backing plate 4, then
Two medial surfaces of bending magnetic shield 2 are attached at the lateral surface of the second interior insulation backing plate 5 and straight magnetic shield 3 respectively, and
The lateral surface of bending magnetic shield 2 at second connecting hole 202 is sticked the second external insulation backing plate 7 and yoke screen 15 successively, then
Insulation blanket stud 8 is inserted at two connecting holes 202 and is tightened, then be inserted in second packing ring 10, and tightened with nut 9；In the first connecting hole
Insulating washer 11 to bottom is first embedded at 201, then insulation pillar 12 is set in the centre bore of insulating washer 11, outside first
Insulating pad 6 is attached at the hole, and the bolt 13 with the first packing ring 14 of screwing on.By said process the end of folder 1 other
Continue that magnet shielding structure is installed in position.Transformation can be improve than the added losses without the magnet shielding structure of folder 1 reduction about 20%
The economic benefit of device.
In this example, folder 1 includes upper clamping piece 1 and lower clamping piece 1, and the first connecting hole 201 is 2 waists of lateral symmetry setting
Shape hole；The second connecting hole 202 on upper clamping piece 1 is 4 circular ports of lateral symmetry setting, the second connecting hole on lower clamping piece 1
202 is 2 circular ports of lateral symmetry setting；Straight magnetic shield 3 is provided with circular port corresponding with 2 kidney-shaped hole sites.
A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder shown in figure 1 above -4 is the utility model
Specific embodiment, embodied the utility model substantive distinguishing features and progress, can be according to actual use needs, in this reality
With the equivalent modifications of the aspects such as shape, structure under new enlightenment, are carried out to it, this programme protection domain row.
Claims (10)
1. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder, it is characterised in that：Including bending magnetic shield
（2）, the first interior insulation backing plate（4）, connection bending magnetic shield（2）With the first interior insulation backing plate（4）To folder（1）Fastening
Part, described bending magnetic shield（2）Cross section is in " L ", bending part arc transition；Described bending magnetic shield（2）It is located at
Folder（1）Outer end.
2. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 1, its feature exists
In：Also include straight magnetic shield（3）, described straight magnetic shield（3）With bending magnetic shield（2）One side be stacked, it is described
Straight magnetic shield（3）, bending magnetic shield（2）, the first interior insulation backing plate（4）By fastener and folder（1）It is connected as one whole
Body.
3. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 1, its feature exists
In：Described bending magnetic shield（2）Thickness be 8-12mm；Highly it is 220-240mm.
4. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 3, its feature exists
In：Described bending magnetic shield（2）It is provided with the first connecting hole（201）, the second connecting hole（202）, described the first connecting hole
（201）, the second connecting hole（202）It is respectively arranged on " L " type bending magnetic shield（2）Two orthogonal flat boards on, it is described
The first connecting hole（201）And/or second connecting hole（202）It is mounting hole.
5. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 4, its feature exists
In：Described fastener includes the first fastener, the second fastener, the first described connecting hole（201）The first fastener is worn,
The second described connecting hole（202）The second fastener is worn, the first fastener is arranged in folder（1）End sides, second is tight
Firmware is arranged in folder（1）End end face.
6. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 2, its feature exists
In：Described straight magnetic shield（3）Located at bending magnetic shield（2）With the first interior insulation backing plate（4）Between.
7. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 5, its feature exists
In：The first described fastener is included bending magnetic shield（2）, straight magnetic shield（3）With the first interior insulation backing plate（4）Fastening
In folder（1）On bolt（13）And packing ring（14）, located at bending magnetic shield（2）With the first packing ring（14）Between first outside
Insulating pad（6）, be embedded at the first connecting hole（201）Interior insulating washer（11）, located at insulating washer（11）And bolt（13）
Between insulation pillar（12）, described insulation pillar（12）Pipe range be equal to folder（1）With the first packing ring（14）Between away from
From.
8. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 5, its feature exists
In：The second described fastener includes insulation blanket stud（8）, second packing ring（10）, nut（9）And located at bending magnetic shield（2）
With yoke screen（15）Between the second external insulation backing plate（7）, insulation blanket stud（8）Ecto-entad sequentially passes through yoke screen（15）, outside second
Insulating pad（7）, bending magnetic shield（2）And it is attached at the second interior insulation backing plate of folder end end face（5）And it is fixed on folder
Part（1）End.
9. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 7 or 8, its feature
It is：First external insulation backing plate（6）, the second external insulation backing plate（7）It is epoxy novolac cardboard；First interior insulation backing plate（4）And the
Two interior insulation backing plates（5）, insulating washer（11）It is laminated paper plate；Described insulation pillar（12）For sulfate pulp is molded
Part.
10. a kind of magnet shielding structure for being applied to super-pressure auto-transformer folder according to claim 2, its feature exists
In：Described bending magnetic shield（2）Stacked by after multi-disc identical silicon steel sheet bending, straight magnetic shield（3）It is identical by multi-disc
Silicon steel sheet stacking form, be brought into close contact between adjacent two panels silicon steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621024051.9U CN206282708U (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621024051.9U CN206282708U (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder |
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| Publication Number | Publication Date |
|---|---|
| CN206282708U true CN206282708U (en) | 2017-06-27 |
Family
ID=59084476
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621024051.9U Active CN206282708U (en) | 2016-08-31 | 2016-08-31 | A kind of magnet shielding structure for being applied to super-pressure auto-transformer folder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109524221A (en) * | 2018-12-21 | 2019-03-26 | 济南西门子变压器有限公司 | 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 |
-
2016
- 2016-08-31 CN CN201621024051.9U patent/CN206282708U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109524221A (en) * | 2018-12-21 | 2019-03-26 | 济南西门子变压器有限公司 | 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 |
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