CN101935746B - Annealing treatment method for coiled iron core of triangular coiled iron core transformer - Google Patents
Annealing treatment method for coiled iron core of triangular coiled iron core transformer Download PDFInfo
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- CN101935746B CN101935746B CN 201010298365 CN201010298365A CN101935746B CN 101935746 B CN101935746 B CN 101935746B CN 201010298365 CN201010298365 CN 201010298365 CN 201010298365 A CN201010298365 A CN 201010298365A CN 101935746 B CN101935746 B CN 101935746B
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Abstract
The invention relates to an annealing treatment method for a coiled iron core of a triangular coiled iron core transformer. The iron core is is arranged in a more reasonable combination way, and three identical single frames are spliced to form a three-dimensional equilateral triangular iron core. The annealing treatment method has the characteristics that the spliced iron core is assembled and annealed, so that magnetic resistance of the iron core is greatly reduced, and the internal stress, the exciting current and the no-load loss are obviously reduced. The annealing treatment method is characterized in that the annealing of the three-dimensional triangular coiled iron core transformer is carried out in a vacuum annealing furnace. The annealing of the three-dimensional triangular coiled iron core transformer is completed by slowly injecting pure nitrogen gas at high temperature of 500-600 DEG C and in vacuum of -0.1-0.5 MPa and maintaining the temperature for 2-3 hours. The iron core is annealed in vacuum, the stress produced during the transportation, the cutting and the winding of a silicon sheet is eliminated, the inherent electromagnetism of the silicon steel sheet is restored, the entire magnetic circuit has no high magnetic resistance, and thus, both the no-load loss and the exciting current can be greatly reduced.
Description
Technical field
The present invention relates to a kind of processing and fabricating method of power transformer parts, particularly relate to a kind of annealing method of stereoscopic triangular coiled-core transformer volume fabrication of iron core, be mainly used in the manufacture craft of trilateral power transformer.
Background technology
Power transformer is one of equipment the most key in a kind of electrical power trans mission/distribution system, the whole electrical power trans mission/distribution system of good and bad directly impact of power transformer.Because power transformer mainly is the translating eqipment that carries out voltage according to user's needs, so at Transformer, can produce some losses.Because present electrical transformer cores mostly is the planar alignment laminated structure, the deficiency of this kind structure be that magnetic circuit is asymmetric, magnetic resistance is large, no-load current is large, open circuit loss is high and during operation noise large.In order to reduce the loss of transformer, a kind of stereoscopic triangular coiled-core transformer has been proposed recently, this trilateral reel iron core transformer is that the iron core with transformer changes the iron core that trilateral is arranged into.Such as Chinese patent 99114376.0 and 00220995.0 a kind of cubic three phase transformer iron core with round section and triangle iron core transformer have been proposed respectively, this kind iron core and transformer magnetic circuit are symmetrical, magnetic resistance is little, no-load current is little, open circuit loss is low, the operation noise is low, and it has played a strong prograding to the development of transformer.But the iron core of triangle core iron core transformer has changed trilateral into and has arranged, this making processing for iron core has brought disadvantageous place, especially iron core compresses when forming a triangle iron core, adopt siliconized plate coiling moulding because be, siliconized plate is in winding process, the siliconized plate band is rolled up the effect of pressure and tightening force, produce certain stress, especially at operating winding not at that time, the internal stress that produces is larger, be to eliminate the impact that internal stress is arranged magnetism molecule in the siliconized plate, this can affect to iron core, therefore necessary this is solved.Still find no the bibliographical information of this respect through the Searches of Patent Literature.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiency of existing triangle iron core transformer core production method, provide a kind of fabrication of iron core quality that can effectively guarantee the triangle iron core transformer, so that the volume core annealing treatment process of the trilateral reel iron core transformer of the performance of the stress influence iron core can be because of fabrication of iron core after the fabrication of iron core of triangle iron core transformer the time.
The objective of the invention is to be achieved through the following technical solutions, a kind of volume core annealing treatment process of trilateral reel iron core transformer, iron core pieced together according to three identical single frames roll up core annealing behind the three-dimensional equilateral triangle iron core and process, its characteristics are, described stereo-triangular wound core annealing is processed and will be carried out anneal after the iron core amalgamation again, and anneal uses vacuum state to carry out anneal in vacuum annealing furnace; Described stereo-triangular wound core annealing is processed and is carried out anneal according to following operation and processing condition:
1, first the stereoscopic triangular coiled-core transformer iron core being sent in the vacuum annealing furnace, closed upper furnace door, is to form airtight cavity in the whole vacuum annealing furnace;
2, start heating unit, make vacuum annealing furnace interior that temperature reaches 500-600 ℃, simultaneously to vacuumizing processing in the vacuum annealing furnace, the interior vacuum tightness of vacuum annealing furnace is reached-0.1-0.5MPa;
3, the insulation annealing that stereoscopic triangular coiled-core transformer iron core in the vacuum annealing furnace was carried out 2-3 hour is processed, when insulation incessantly in vacuum annealing furnace, in average one cubic metre of space vacuum annealing furnace space, inject the speed that 5-50 rises pure nitrogen gas according to per minute, slowly inject pure nitrogen gas.
4, after insulation annealing is processed, naturally cool to normal temperature.
The invention has the beneficial effects as follows: core annealing technique provided by the present invention and annealing furnace regulations for technical operation are very large on the quality product impact, by adjustment equipment and production technique, greatly shortened the annealing time of iron core, and annealing curve fundamental sum design curve coincide, and has improved greatly production efficiency and the performance level of iron core.Iron core is processed through vacuum annealing, the stress that has produced when having eliminated siliconized plate transportation, shearing, coiling has recovered the intrinsic electro permanent magnetic of siliconized plate, and magnetic circuit all exists without high magnetic resistance everywhere, so that iron core magnetic resistance reduces greatly, internal stress, magnetizing current and open circuit loss significantly reduce.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment one
A kind of volume core annealing treatment process of trilateral reel iron core transformer, iron core pieced together according to three identical single frames roll up core annealing behind the three-dimensional equilateral triangle iron core and process, its characteristics are, described stereo-triangular wound core annealing is processed and will be carried out anneal after the iron core amalgamation again, and anneal uses vacuum state to carry out anneal in vacuum annealing furnace; Described stereo-triangular wound core annealing is processed and is carried out anneal according to following operation and processing condition:
1, first the stereoscopic triangular coiled-core transformer iron core being sent in the vacuum annealing furnace, closed upper furnace door, is to form airtight cavity in the whole vacuum annealing furnace;
2, start heating unit, make vacuum annealing furnace interior that temperature reaches 500-600 ℃, simultaneously to vacuumizing processing in the vacuum annealing furnace, the interior vacuum tightness of vacuum annealing furnace is reached-0.1-0.5MPa;
3, the insulation annealing that stereoscopic triangular coiled-core transformer iron core in the vacuum annealing furnace was carried out 2-3 hour is processed, when insulation incessantly in vacuum annealing furnace, in average one cubic metre of space vacuum annealing furnace space, inject the speed that 5-20 rises pure nitrogen gas according to per minute, slowly inject pure nitrogen gas.
4, after insulation annealing is processed, naturally cool to normal temperature.
Iron core is processed through vacuum annealing, and the stress that has produced when having eliminated siliconized plate transportation, shearing, coiling has recovered the intrinsic electro permanent magnetic of siliconized plate, and magnetic circuit all exists without high magnetic resistance everywhere, so open circuit loss and magnetizing current all can significantly descend.
Embodiment two
A kind of volume core annealing treatment process of trilateral reel iron core transformer, the arrangement mode of iron core has been carried out more reasonably combination, adopt three identical single frames to piece together three-dimensional equilateral triangle iron core, its characteristics are, iron core carries out anneal through after the assembly unit again at the iron core after the amalgamation, so that iron core magnetic resistance reduces greatly, internal stress, magnetizing current and open circuit loss significantly reduce.
The annealing of described stereoscopic triangular coiled-core transformer iron core is to carry out in vacuum annealing furnace.The annealing of stereoscopic triangular coiled-core transformer iron core is in 600 ℃ of high temperature, vacuum-0.5MPa situation, in average one cubic metre of space vacuum annealing furnace space, inject the speed that 20-50 rises pure nitrogen gas according to per minute, slowly inject pure nitrogen gas, through what finish after 2 hours the insulation.Iron core is processed through vacuum annealing, and the stress that has produced when having eliminated siliconized plate transportation, shearing, coiling has recovered the intrinsic electro permanent magnetic of siliconized plate, and magnetic circuit all exists without high magnetic resistance everywhere, so open circuit loss and magnetizing current all can significantly descend.
Claims (2)
1. the volume core annealing treatment process of a trilateral reel iron core transformer, iron core pieced together according to three identical single frames roll up core annealing behind the three-dimensional equilateral triangle iron core and process, described three-dimensional equilateral triangle core annealing is processed and will be carried out anneal after the iron core amalgamation again, and anneal uses vacuum state to carry out anneal in vacuum annealing furnace; It is characterized in that: described three-dimensional equilateral triangle core annealing is processed and is carried out anneal according to following operation and processing condition:
1) first the stereoscopic triangular coiled-core transformer iron core is sent in the vacuum annealing furnace, closed upper furnace door, make and form airtight cavity in the whole vacuum annealing furnace;
2) start heating unit, make the temperature in the vacuum annealing furnace reach 500-600 ℃, simultaneously to vacuumizing processing in the vacuum annealing furnace, the interior vacuum tightness of vacuum annealing furnace is reached-0.1-0.5MPa;
3) insulation annealing that stereoscopic triangular coiled-core transformer iron core in the vacuum annealing furnace was carried out 2-3 hour is processed, in 500 ℃ of high temperature, vacuum-0.1MPa situation, when insulation incessantly in vacuum annealing furnace, in average one cubic metre of space vacuum annealing furnace space, inject the speed that 5-50 rises pure nitrogen gas according to per minute, slowly inject pure nitrogen gas;
4) through after 2-3 hour the insulation annealing processing, naturally cool to normal temperature.
2. the volume core annealing treatment process of trilateral reel iron core transformer as claimed in claim 1, it is characterized in that: the annealing of stereoscopic triangular coiled-core transformer iron core is in 500 ℃ of high temperature, vacuum-0.1MPa situation, in average one cubic metre of space vacuum annealing furnace space, inject the speed that 20-50 rises pure nitrogen gas according to per minute, slowly inject pure nitrogen gas, through what finish after 3 hours the insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010298365 CN101935746B (en) | 2010-09-30 | 2010-09-30 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010298365 CN101935746B (en) | 2010-09-30 | 2010-09-30 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
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| Publication Number | Publication Date |
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| CN101935746A CN101935746A (en) | 2011-01-05 |
| CN101935746B true CN101935746B (en) | 2013-01-23 |
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| CN 201010298365 Expired - Fee Related CN101935746B (en) | 2010-09-30 | 2010-09-30 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102676757A (en) * | 2012-05-24 | 2012-09-19 | 中兆培基（北京）电气有限公司 | Annealing process of amorphous alloy transformer core |
| CN103045814A (en) * | 2013-01-21 | 2013-04-17 | 东莞市康德威变压器有限公司 | Core annealing process of three-dimensional wound-core transformer |
| CN106834624A (en) * | 2017-03-08 | 2017-06-13 | 佛山市百思科铁芯制造有限公司 | A kind of new knot installation and annealing process for iron core high annealing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2487084Y (en) * | 2001-07-13 | 2002-04-17 | 周根喜 | Rolling iron core of three phase transformer |
| CN101082075A (en) * | 2006-05-29 | 2007-12-05 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| CN201051437Y (en) * | 2007-06-12 | 2008-04-23 | 陈育生 | Triangle transformer iron core |
| CN201315229Y (en) * | 2008-12-16 | 2009-09-23 | 广东中电华强变压器有限公司 | Oil immersed 3D triangle rolled iron core transformer |
| CN101575664A (en) * | 2009-04-24 | 2009-11-11 | 同济大学 | Process for heat treatment of amorphous transformer core |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2487084Y (en) * | 2001-07-13 | 2002-04-17 | 周根喜 | Rolling iron core of three phase transformer |
| CN101082075A (en) * | 2006-05-29 | 2007-12-05 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| CN201051437Y (en) * | 2007-06-12 | 2008-04-23 | 陈育生 | Triangle transformer iron core |
| CN201315229Y (en) * | 2008-12-16 | 2009-09-23 | 广东中电华强变压器有限公司 | Oil immersed 3D triangle rolled iron core transformer |
| CN101575664A (en) * | 2009-04-24 | 2009-11-11 | 同济大学 | Process for heat treatment of amorphous transformer core |
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