CN102637509B - Iron core and transformer - Google Patents
Iron core and transformer Download PDFInfo
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- CN102637509B CN102637509B CN201210135307.3A CN201210135307A CN102637509B CN 102637509 B CN102637509 B CN 102637509B CN 201210135307 A CN201210135307 A CN 201210135307A CN 102637509 B CN102637509 B CN 102637509B
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- iron core
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Abstract
The embodiment of the invention relates to an iron core and a transformer. The iron core comprises an iron core frame, a silicon steel sheet, an oil guide groove and epoxy adhesives, wherein the iron core frame is formed by winding amorphous strips, the lower part of the iron core frame is a lower iron yoke part, the upper part of the iron core frame is an upper iron yoke part, the silicon steel sheet is covered on the inner surface and the lower surface of the iron core frame, the oil guide groove is arranged on the upper iron yoke part, and the epoxy adhesives are fixedly sealed on the two end surfaces of the iron core frame except the oil guide groove and the lower iron yoke part. The iron core and the transformer provided by the embodiment of the invention have the advantages that the oil guide groove is arranged on the upper iron yoke part, so oil flows seeped into the iron core can smoothly flow out from the oil guide groove, the oil path smoothness is ensured, the existence of an iron core dead oil region is effectively avoided, the iron core heat radiation is favorably realized, meanwhile, the operation safety of the transformer can be improved, and the service life of the transformer is effectively prolonged.
Description
Technical field
The embodiment of the present invention relates to amorphous alloy strips field, particularly relates to a kind of iron core and transformer.
Background technology
Amorphous alloy strips is widely used in every field with its superior electromagnetic performance, and wherein maximum application is power domain, is mainly used in making amorphous distribution transformer iron core.The amorphous distribution transformer of iron core is made of amorphous alloy strips, its no-load loss is only about 75% of common silicon steel transformer, have good energy-saving effect, the amorphous distribution transformer simultaneously adopting amorphous iron core to make also has huge environmental benefit, few to airborne release CO
2, SO
2, reduce nuke rubbish, to energy-saving and emission-reduction, construction " green network " important in inhibiting of national grid, therefore amorphous alloy distribution transformer will have very large application potential in China's electrical network.Fig. 1 is prior art iron core schematic diagram, and as shown in Figure 1, current amorphous distribution transformer iron core mainly adopts amorphous band directly to reel, is shaped to the iron core frame of rectangle, and rectangle iron core frame is made up of upper yoke portion 11, lower yoke portion 12 and stem stem 13.Iron core frame both ends of the surface are except lower yoke portion 11, and all the other all adopt epoxy resin sealing.
Although this structure is generally used, but there is a very large defect, such as iron core is except lower yoke portion, and all the other positions are all lived by epoxy glue sealing, after bottom oil flows through the lower yoke portion infiltration iron core without sealing, cannot flow out from other position, namely after oil flows to amorphous iron core inside, namely become region of bypassed oil, core interior can not form unobstructed oil circuit, the drawbacks such as it is difficult that this just easily causes iron core to dispel the heat, and temperature is high.Cause Transformer Insulation Aging maybe can not make the problems such as transformer oepration at full load, very large hidden danger is existed to the economy of amorphous transformer, safe operation.
Summary of the invention
The object of the embodiment of the present invention proposes a kind of iron core and transformer, is intended to solve existing core interior and can not forms unobstructed oil circuit, thus cause iron core dispel the heat difficult and cause the problem of the easy ageing of insulation of transformer.
For achieving the above object, embodiments provide a kind of iron core, described iron core comprises: iron core frame, and by amorphous band coiling and molding, the bottom of described iron core frame is lower yoke portion, and the top of described iron core frame is upper yoke portion; Silicon steel sheet, is coated on inner surface and the outer surface of described iron core frame; Oil guide groove, is opened in described upper yoke portion; Epoxy glue, sealing is in the both ends of the surface of the described iron core frame except described lower yoke portion and described oil guide groove.
The embodiment of the present invention additionally provides a kind of transformer with above-mentioned iron core.
The iron core of the embodiment of the present invention and transformer, by offering oil guide groove in upper yoke portion, thus the oily stream infiltrating iron core can be flowed out smoothly by oil guide groove, guarantee oil circuit is smooth and easy, effectively prevent the existence of iron core region of bypassed oil, be conducive to iron core heat radiation, the fail safe that transformer runs can be improved simultaneously, effectively extend the useful life of transformer.
Accompanying drawing explanation
Fig. 1 is prior art iron core schematic diagram;
Fig. 2 is the schematic diagram not comprising epoxy glue of embodiment of the present invention iron core;
Fig. 3 is the schematic diagram not comprising silicon steel sheet of embodiment of the present invention iron core.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The iron core that the embodiment of the present invention proposes, oil guide groove is offered by the upper yoke at iron core, thus the oil stream of infiltration core interior can be made to flow out smoothly from oil guide groove, make oil circuit smooth and easy, avoid the existence of iron core region of bypassed oil, be conducive to iron core heat radiation, thus avoid too high the brought a series of harm of iron core local temperature.
Fig. 2 is the schematic diagram not comprising epoxy glue of embodiment of the present invention iron core, Fig. 3 is the schematic diagram not comprising silicon steel sheet of embodiment of the present invention iron core, as shown in Figure 2 and Figure 3, the iron core of the embodiment of the present invention comprises: iron core frame 21, silicon steel sheet 22, epoxy glue 23 and oil guide groove 24 form.It should be noted that, be the summary of the invention of the clearer expression embodiment of the present invention, eliminate in Fig. 2 in epoxy glue 23, Fig. 3 and eliminate silicon steel sheet 22, thus need Fig. 2 and Fig. 3 to combine the iron core understanding the embodiment of the present invention.
Iron core frame 21 directly can be reeled by amorphous band and be formed, and the width of amorphous band is 140 ~ 220mm, and the part of iron core frame 21 dotted line more than 27 is the upper yoke portion 25 of iron core frame 21, and the part of iron core frame 21 dotted line less than 28 is the lower yoke portion 26 of iron core frame 21.Iron core frame 21 adopts the amorphous band of certain length to fold and forms, concrete, it is one group with multi-disc (be preferably 25) amorphous alloy strips, Special iron core mold is adopted to fold into the first iron core ring, then be one group and fold into the second iron core ring with multi-disc (being preferably 25) amorphous alloy strips in the outside of the first iron core ring again, by that analogy, constitute iron core frame 21 by organizing iron core ring more.The seam often organizing iron core ring is all positioned at place of lower yoke portion 26, and the seam of iron core ring can adopt the mode of overlap joint in upright arrangement, also can adopt the mode of fan-shaped overlap joint.In a preferred embodiment of the invention, the seam of iron core ring adopts the mode of fan-shaped overlap joint, and seam areas can be made to stagger as far as possible, effectively can improve the Distribution of Magnetic Field of seam crossing, reduces magnetic flux density concentrations herein, effectively can reduce core loss.Adopt the mode of fan-shaped overlap joint simultaneously, overlapping part thickness can be made to reduce, iron core framework can be effectively reduced and amass.According to actual conditions needs, the iron core of the embodiment of the present invention can be three-phase three-limb iron core also can be three-phase five-limb iron core.
Silicon steel sheet 22 is coated on inner surface and the outer surface of iron core frame 21.Silicon steel sheet 22 can adopt the grain-oriented Si steel sheet of colding pressing that magnetic property is good and mechanical strength is high, and its thickness is 0.3mm.
Epoxy glue 23 sealing is in the both ends of the surface except lower yoke portion 26 of iron core frame 21 and silicon steel sheet 22, and namely the both ends of the surface in lower yoke portion 26 do not need sealing epoxy glue 23.Epoxy glue 23 sealing, in the both ends of the surface of iron core frame 21 and silicon steel sheet 22, refers to that epoxy glue 23 sealing is on the side of iron core frame 21 and silicon steel sheet 22, can live the side sealing of iron core frame 21 and silicon steel sheet 22.The thickness of epoxy glue 23 is 2 ~ 3mm, and preferably, the thickness of epoxy glue 23 is 2mm.Adopt epoxy glue 23 sealing in the embodiment of the present invention in the both ends of the surface of iron core frame 21 and silicon steel sheet 22, can effectively solidify iron core frame 21, problem more crisp, frangible after solving amorphous band annealing, reduce the assembly difficulty of iron core, avoid iron core performance in assembling process to affect larger shortcoming by assembly technology.
Again as shown in Figure 3, upper yoke portion 25 offers oil guide groove 24, the upper yoke portion 25 that it should be noted that the embodiment of the present invention offers oil guide groove 24 is actual refers to that in upper yoke portion 25, leave a fixed gap does not have sealing epoxy glue 23, do not have the gap of sealing epoxy glue 23 just to define oil guide groove 24, preferred oil guide groove 24 is positioned at the middle part in upper yoke portion 25.The width of oil guide groove 24 is being determined according to the concrete size of iron core frame 21, and the width of preferred oil guide groove 24 is 10 ~ 30mm.Oil guide groove 24 can enable the oily stream being infiltrated iron core by lower yoke portion 26 be flowed out smoothly by oil guide groove 24, thus ensure that oil circuit is smooth and easy, be conducive to iron core heat radiation, avoid the existence of iron core region of bypassed oil, thus avoid the too high a series of harm that may bring of iron core local temperature.
Existing iron core frame 21 is except lower yoke portion 26, the both ends of the surface of remainder all adopt epoxy glue 23 sealing, thus cause to flow out from other position when oil flows through after iron core is infiltrated in lower yoke portion 26, namely after oil flows to core interior, namely region of bypassed oil is become, core interior can not form clear and coherent oil circuit, causes iron core to dispel the heat difficult, the drawbacks such as temperature is high.
The iron core of the embodiment of the present invention, by offering oil guide groove in upper yoke portion, the oily stream being infiltrated iron core by lower yoke portion can be flowed out smoothly by oil guide groove, guarantee oil circuit is smooth and easy, effectively prevent the existence of iron core region of bypassed oil, be conducive to iron core heat radiation, thus avoid the too high a series of harm that may bring of iron core local temperature.
Above-described embodiment is the embodiment for iron core, and the iron core of the embodiment of the present invention can be applied in transformer.The amorphous distribution transformer of iron core is made of amorphous alloy strips, its no-load loss is only about 75% of common silicon steel transformer, have good energy-saving effect, the amorphous distribution transformer simultaneously adopting amorphous iron core to make also has huge environmental benefit, few to airborne release CO
2, SO
2, reduce nuke rubbish.But, adopt the transformer of existing iron core, because iron core also exists region of bypassed oil (oil circuit is obstructed) and bad problem of dispelling the heat in its structure, when easily causing transformer to run, iron core temperature is too high, cause Transformer Insulation Aging maybe can not make the problems such as transformer oepration at full load, very large hidden danger is existed to the safe operation of amorphous transformer.
Adopt the transformer of embodiment of the present invention iron core, because iron core is provided with oil guide groove, the oily stream being infiltrated iron core by lower yoke portion can be flowed out smoothly by oil guide groove, guarantee oil circuit is smooth and easy, be conducive to iron core heat radiation, thus solve traditional transformer ageing of insulation and can not the problem of oepration at full load, effectively improve the coefficient of safety of transformer, extend the useful life of transformer, improve the economic worth of transformer simultaneously.
Concrete, in the present invention's example, transformer adopts the iron core of band oil guide groove structure, iron core both ends of the surface respectively apply the thick epoxy glue of 2mm, middle place of iron core upper yoke portion is provided with the wide oil guide groove of 15mm (both ends of the surface each), and iron core ectonexine is all with the grain-oriented Si steel sheet parcel of colding pressing that the magnetic property of 0.3mm is good.Adopt the transformer that this structure iron core is made, temperature rise test is carried out to it, test result is as follows, the temperature rise of transformer oil top layer is 47.8 DEG C, and same money transformer (except iron core is not with oil guide groove, remaining design is just the same) the temperature rise test result that employing is not made with the iron core of oil guide groove structure is: the temperature rise of transformer oil top layer is 53 DEG C.
Can be found out by test result, adopt transformer with oil guide groove iron core under the constant prerequisite of wananty costs, its temperature rise ratio adopts the transformer temperature rise not with oil guide groove iron core low 5.2 DEG C with money, this long-term safety to transformer is run and is provided reliable guarantee, therefore the amorphous transformer of the iron core of the embodiment of the present invention is adopted effectively can to solve the region of bypassed oil problem of core interior, ensure that oil stream is smooth and easy, structure is more reasonable, thus effectively can extend the useful life of transformer.
Concrete, in another example of the present invention, transformer adopts the iron core of band oil guide groove structure, iron core both ends of the surface respectively apply the thick epoxy glue of 3mm, iron core upper yoke portion is provided with the wide oil guide groove of 30mm (both ends of the surface each), and iron core ectonexine is all with the grain-oriented Si steel sheet parcel of colding pressing that the magnetic property of 0.3mm is good.Adopt the transformer that this structure iron core is made, temperature rise test is carried out to it, test result is as follows, the temperature rise of transformer oil top layer is 48.2 DEG C, and same money transformer (except iron core is not with oil guide groove, remaining design is just the same) the temperature rise test result that employing is not made with the iron core of oil guide groove structure is: the temperature rise of transformer oil top layer is 54.5 DEG C.
Can be found out by test result, adopt the transformer of band oil guide groove iron core under the constant prerequisite of wananty costs, its temperature rise ratio adopts the transformer temperature rise not with oil guide groove iron core low 6.3 DEG C with money, this long-term safety to transformer is run and is provided reliable guarantee, therefore the amorphous transformer of the iron core of the embodiment of the present invention is adopted effectively can to solve the region of bypassed oil problem of core interior, ensure that oil stream is smooth and easy, structure is more reasonable, thus effectively can extend the useful life of transformer.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. an iron core, is characterized in that, described iron core comprises:
Iron core frame, by amorphous band coiling and molding, the bottom of described iron core frame is lower yoke portion, and the top of described iron core frame is upper yoke portion;
Silicon steel sheet, is coated on inner surface and the outer surface of described iron core frame;
Oil guide groove, is opened in described upper yoke portion;
Epoxy glue, sealing is in the both ends of the surface of the described iron core frame except described lower yoke portion and described oil guide groove;
Wherein, described upper yoke portion leaves space does not have epoxy glue described in sealing, and described space defines described oil guide groove.
2. iron core according to claim 1, is characterized in that, described iron core is three-phase three-limb iron core or three-phase five-limb iron core.
3. iron core according to claim 1, is characterized in that, described oil guide groove is opened in the pars intermedia in described upper yoke portion.
4. iron core according to claim 1, is characterized in that, the width of described oil guide groove is 10 ~ 30mm.
5. iron core according to claim 1, is characterized in that, the thickness of described silicon steel sheet is 0.3mm.
6. iron core according to claim 1, is characterized in that, the thickness of described epoxy glue is 2 ~ 3mm.
7. one kind has the transformer of iron core described in above-mentioned arbitrary claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135307.3A CN102637509B (en) | 2012-05-03 | 2012-05-03 | Iron core and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135307.3A CN102637509B (en) | 2012-05-03 | 2012-05-03 | Iron core and transformer |
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| Publication Number | Publication Date |
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| CN102637509A CN102637509A (en) | 2012-08-15 |
| CN102637509B true CN102637509B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210135307.3A Active CN102637509B (en) | 2012-05-03 | 2012-05-03 | Iron core and transformer |
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| CN104795211B (en) * | 2015-04-10 | 2017-05-31 | 海鸿电气有限公司 | A kind of open-core type three dimensional wound core and its manufacture craft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201397726Y (en) * | 2009-03-16 | 2010-02-03 | 常州特种变压器有限公司 | Oil immersed amorphous alloy double-voltage transformer |
| CN201421766Y (en) * | 2009-05-21 | 2010-03-10 | 上海市电力公司 | Transformer with guiding device |
| CN101740203A (en) * | 2010-01-08 | 2010-06-16 | 中电电气集团有限公司 | Amorphous alloy transformer core and manufacturing method thereof |
| CN201820597U (en) * | 2010-09-29 | 2011-05-04 | 上海日港置信非晶体金属有限公司 | Amorphous alloy iron core with thin epoxy coatings |
-
2012
- 2012-05-03 CN CN201210135307.3A patent/CN102637509B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201397726Y (en) * | 2009-03-16 | 2010-02-03 | 常州特种变压器有限公司 | Oil immersed amorphous alloy double-voltage transformer |
| CN201421766Y (en) * | 2009-05-21 | 2010-03-10 | 上海市电力公司 | Transformer with guiding device |
| CN101740203A (en) * | 2010-01-08 | 2010-06-16 | 中电电气集团有限公司 | Amorphous alloy transformer core and manufacturing method thereof |
| CN201820597U (en) * | 2010-09-29 | 2011-05-04 | 上海日港置信非晶体金属有限公司 | Amorphous alloy iron core with thin epoxy coatings |
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| CN102637509A (en) | 2012-08-15 |
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Effective date of registration: 20160614 Address after: 266232 Jimo City, Qingdao Province Blue Village Xinyuan Road, No. 9 Patentee after: QINGDAO YUNLU ADVANCED MATERIALS TECHNOLOGY CO., LTD. Address before: 266109 West Industrial Zone, blue town, Qingdao City, Shandong, Jimo Patentee before: Qingdao Yunlu Energy Technology Co., Ltd. |
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Address after: 266232 No. 9 Xinyuan East Road, LAN Cun town, Jimo, Qingdao, Shandong Patentee after: Qingdao Yunlu Advanced Materials Technology Co., Ltd. Address before: 266232 No. 9 Xinyuan East Road, LAN Cun town, Jimo, Qingdao, Shandong Patentee before: QINGDAO YUNLU ADVANCED MATERIALS TECHNOLOGY CO., LTD. |
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