CN101350246A - Dry type transformer for hatch winding iron core - Google Patents
Dry type transformer for hatch winding iron core Download PDFInfo
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- CN101350246A CN101350246A CNA2007100121699A CN200710012169A CN101350246A CN 101350246 A CN101350246 A CN 101350246A CN A2007100121699 A CNA2007100121699 A CN A2007100121699A CN 200710012169 A CN200710012169 A CN 200710012169A CN 101350246 A CN101350246 A CN 101350246A
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Abstract
The invention relates to a dry-type transformer with open-ended roll-cores, wherein an iron core thereof is formed from forming a rectangular frame body which is in a shape like a transverse Chinese character 'ri' through arranging two open-ended roll-cores whose exterior appearances are in a shape like a Chinese character 'kou' in parallel and sections are in a concave semi-oblate shape, and enwrapping the rectangular frame body which is in a shape like a transverse Chinese character 'ri' inside by another open-ended roll-core whose section is in a convex semi-oblate shape. After the assembly, the sections of the three columns can be in an oblate shape or a step shape (an external oblate shape) or a polygonal shape (the external oblate shape). Since the roll-core open-ended, thereby coils can be separately winded, and the coils can be installed or replaced through opening the roll-cores from the to-be U-shaped position of the opening gap during the production and the maintenance, and the whole process is very convenient and fast.
Description
Affiliated technical field
Type of the present invention relates to transformer manufacture technology.
Background technology
Dry-type transformer mainly is made up of iron core and coil, and the core structure of present domestic conventional dry transformer is two kinds of stacked and takeup types.Laminated core structure is to be formed by the silicon steel sheet stack, because all there is many places mitre in the iron core of stack moulding in junction, every layer of limit, thereby cause the increase of magnetic resistance and iron loss, the exciting current of transformer is also increased, reduced power factor, had a strong impact on the power supply quality of electrical network, the existence of iron core seam has also caused the big problem of running noises.The takeup type iron core is called the volume iron core again, is to be reeled by the silicon strip of definite shape to form, and the volume iron core has a certain upgrade than the performance of laminated core structure, is mainly reflected in that no-load loss is low, noise is little.But because the volume iron core is a jointless structure, also there are problems, as: manufacturing equipment production capacity is limited, and iron-core coil when coiling needs special-purpose spooling equipment, and will be with iron core to wind the line, and winding process difficulty, complexity, production efficiency are low.Especially can't solve big-and-middle-sized transformer coiling and paint-dipping process.The maintenance aspect is very difficult especially, in case the transformer coil breaks down, just can't take off coil from iron core and change, and must cause scrapping of whole transformer.Owing to have above-mentioned shortcoming, restricted the popularization and the use of no seam volume iron core.
Summary of the invention
Type of the present invention provides a kind of dry-type transformer for hatch winding iron core, and it is that the stem stem cross section is oblate open coil iron core, has thoroughly solved the problem that performance is low and reel iron core transformer technology is made of laminated core structure transformer.Open coil iron core is exactly in the iron core manufacture process, the curve silicon steel sheet billot of being left by the iron core curve cutting machine of special use successively turns to iron core continuously after disconnection, a fracture is arranged in every layer, by clocklike carrying out linear array, fracture site is located at yoke or yoke down under coiling iron core machine automatic control system for every layer of fracture site.The cross sectional shape of three stem stems in the described transformer core of type of the present invention can be oblateness, step (external oblateness) or polygon (external oblateness), and the cross sectional shape of corresponding high and low pressure coil cover is oblate.Because iron core has open nature, make whole transformer in producing and keeping in repair, not need special-purpose volume iron-core coil spooling equipment.The kind of the dry-type transformer that type of the present invention relates to and capacity: three-phase F level epoxy resin dry type transformer, capacity is at 30KVA～3150KVA; The non-insulating dry type transformer of sealing of H level NOMEX impregnated, capacity is at 30KVA～3150KVA.
The technical scheme that its technical problem that solves type of the present invention adopts is: the cross section of the iron core stem stem of this dry-type transformer is for oblate.The iron core of this transformer is to be horizontal " day " font iron core framework by two face shapings for its cross section of " mouth " font is indent half face shaping of oblate single-phase open coil iron core formation placed side by side, in horizontal stroke " day " font iron core framework outside by a face shaping be greatly its tee section of " mouth " font be evagination partly oblate single-phase open coil iron core framework closely wrap reality.The cross section of three stem stems of iron core all is to be formed by two indents, half oblateness and evagination half an oblate butt joint, and three stem stem cross sections are oblate.Whole iron core adopts thickness to roll to the cold rolled silicon steel billot of 0.35mm at 0.18mm and forms, three the single-phase iron cores that whole iron core adopted of reeling all are that silicon strip continuous coiling after cut-out forms, rather than the iron core that coiling is good successively cuts off, and the advantage of coiling is to make iron core more closely reach the iron core fracture neatly not have burr continuously.The cross sectional shape of every single-phase open coil iron core that type of the present invention is above-mentioned can also be step (external partly oblate) or polygon (external half is oblate), and the cross section of three stem stems of iron core that assembling finishes is corresponding to be step (external oblateness) or polygon (external oblateness).Coupling part between stem stem and the stem stem is an iron core iron yoke, and the iron core aperture position can be in that down yoke also can be at last yoke.Be the U type after the open core place successively opened respectively, the good transformer of coiling required elementary, secondary coil are inserted in three stem stems, then with iron core closed layer by layer and install, lower clamping piece, draw high-voltage terminal and low voltage terminal at last and be complete dry-type transformer.
The beneficial effect of type of the present invention is that this dry-type transformer has advantages such as magnetic circuit is short, power factor is high, volume is little, anti-sudden short circuit ability is strong, process conditions are good.And no-load loss descends 10%, and it is about 20% that no-load current descends, and noise reduces more than 4 decibels, saving silicon strip 10%.When cross sectional shape was step (external oblateness), the utilance of material was 100%, and the integral production cost can descend more than 10%.Do not need the spooling equipment of special-purpose volume iron core special use in manufacturing process, coil coiling has separately improved production efficiency.In transformer used, in a single day transformer coil broke down, and the transformer core opening part can be opened back taking-up coil and keep in repair and change, and had fundamentally solved the defective that no seam volume iron core can not keep in repair.Because the stem stem cross section is oblate, make magnetic circuit shorter simultaneously, loss reduces.
Description of drawings
Below in conjunction with drawings and Examples type of the present invention is further specified.
The stem stem of Fig. 1 type of the present invention is oblate cross sectional view.
The iron core decomposition view of Fig. 2 type of the present invention.
The stem stem of Fig. 3 type of the present invention is the cross sectional view of step (external oblateness).
The stem stem of Fig. 4 type of the present invention is the cross sectional view of polygon (external oblateness).
The stem stem of Fig. 5 type of the present invention is oblate cross sectional view.
Fig. 6 fracture site is at the view of the iron core of last yoke.
Fig. 7 fracture site is at the view of the iron core of following yoke.
The outside drawing of Fig. 8 type transformer of the present invention.
The view of every layer of silicon steel sheet of the single-phase iron core of Fig. 9.
The scope of the size range of the iron core of corresponding different capabilities transformer: H among Fig. 1, Fig. 3, Fig. 4 That 300mm is to 2000mm; The scope of HL is that 350mm is to 1800mm; The scope of L is 400mm To 2550mm; The scope of Mo is that 170mm is to 1150mm; The yoke wide region is that 50mm is to 700mm.
The oblate shape of the core section of transformer is made up of a rectangle and two semicircles among Fig. 5, The rectangle length of side is that the radius of two semicircles of a all is R; The iron core stem stem of corresponding different capabilities transformer cuts The face scope is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.
The number of steps of Fig. 3 SMIS column section is referred to as the progression (representing with n) of iron core, and is corresponding different The scope of capacity transformer n is that n is 5 among 5～19, the figure, and namely progression is 5 grades.
The scope of the polygon number in the iron core stem stem cross section of corresponding different capabilities transformer is 8～50 among Fig. 4.
The apparent size scope of corresponding different capabilities transformer among Fig. 8: the scope of a is that 415mm is to 3000mm; The scope of b is that 55mm is to 1000mm; The scope of c is that 420mm is to 2500mm.
Specific embodiments
Referring to Fig. 2, this transformer core is " mouth " font cross section by two face shapings and is that indent half oblate open coil iron core (1), (2) are placed side by side forms horizontal " day " word rectangular-shaped frame body, face shaping be greatly " mouth " font cross section be evagination partly oblate open coil iron core rectangular-shaped frame body (3) with day the font framework wrap up in it.Referring to Fig. 5, the cross section of three stem stems of iron core all is oblate to being connected into oblateness by two indents, half oblateness and an evagination half, and it is oblate that the cross section of three stem stems of iron core that assembling finishes all is.Three the single-phase iron cores that whole iron core adopted of reeling all are that silicon strip continuous coiling after cut-out forms, rather than the iron core that coiling is good successively cuts off.Referring to Fig. 3, if when the cross sectional shape of every single-phase open coil iron core is step (external half is oblate), the cross section of three stem stems of iron core that assembling finishes is step (external oblateness).Referring to Fig. 4, if when the cross sectional shape of every open coil iron core is polygon (external half is oblate), the cross section of three stem stems of iron core that assembling finishes is polygon (external oblateness).Referring to Fig. 6, Fig. 9, the iron core opening part is to have the fracture and the billot that evenly distributes to reel successively by silicon strip to form, aperture position when last yoke (4)～(6), the shape (18) of every silicon steel sheet of the outer single-phase iron core of the shape of every silicon steel sheet of two single-phase iron cores of internal layer (17) and; Referring to Fig. 7, Fig. 9, aperture position when following yoke (7)～(9), the shape (19) of every silicon steel sheet of a shape of every silicon steel sheet of two single-phase iron cores of internal layer (20) and an outer single-phase iron core.Referring to Fig. 8, the iron core that assembling finishes is heat-treated after shaping, again open core is opened into a U type at the aperture slots place, the low-voltage coil that coiling is good (13) is packed in three iron core column, then with the outside fastening insulating barrier (14) of every group of low-voltage coil, the high-tension coil (15) that coiling is good is packed into wherein in the insulating barrier outside again, restore colligation fixed installation upper clamping piece (10) and lower clamping piece (11) and draw high-voltage terminal (16) and low voltage terminal (12) iron core is successively closed at last, glue together at last, flood, dry dry-type transformer.
Claims (10)
1. dry-type transformer for hatch winding iron core, it is characterized in that, transformer core is to be partly oblate single-phase open coil iron core (1) of indent by two face shapings for its cross section of ' mouth ' font, (2) the rectangle framework of a horizontal stroke of formation placed side by side ' day ' font, another cross section is that evagination half oblate open coil iron core rectangle framework (3) is with (1), (2) wrap up in it, the cross section of three posts of iron core that assembling finishes is entirely for oblate, the iron core stem stem cross section scope of corresponding different capabilities transformer is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.
2. a kind of dry-type transformer for hatch winding iron core according to claim 1, it is characterized in that: when the cross sectional shape of every single-phase open coil iron core (1), (2), (3) is step (external half is oblate), the cross section of three posts of iron core that assembling finishes is step (external oblateness) entirely, the scope of corresponding different capabilities transformer core progression is 5～19, the iron core stem stem cross section scope of corresponding different capabilities transformer is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.
3. a kind of dry-type transformer for hatch winding iron core according to claim 1, it is characterized in that: when the cross sectional shape of every single-phase open coil iron core (1), (2), (3) is polygon (external half is oblate), the cross section of three posts of iron core that assembling finishes is polygon (external oblateness) entirely, the scope of the polygon number of corresponding different capabilities transformer core column section is 8～50, the iron core stem stem cross section scope of corresponding different capabilities transformer is, the scope of a is 10mm～300mm, and the scope of R is 20mm～200mm.
4. a kind of dry-type transformer for hatch winding iron core according to claim 1, it is characterized in that: the fracture site of iron core when last yoke (4)～(6), the shape (18) of every silicon steel sheet of the outer single-phase iron core of the shape of every silicon steel sheet of two single-phase iron cores of internal layer (17) and.
5. a kind of dry-type transformer for hatch winding iron core according to claim 1, it is characterized in that: the fracture site of iron core when following yoke (7)～(9), the shape (19) of every silicon steel sheet of a shape of every silicon steel sheet of two single-phase iron cores of internal layer (20) and an outer single-phase iron core.
6. a kind of dry-type transformer for hatch winding iron core according to claim 1 is characterized in that: every single-phase iron core be by silicon strip after cut-out continuously coiling form, reel silicon strip thickness that every single-phase iron core adopted between 0.18mm～0.35mm.
7. a kind of dry-type transformer for hatch winding iron core according to claim 1 is characterized in that: the size range of the iron core of corresponding different capabilities transformer, the scope of H are that 300mm is to 2000mm; The scope of HL is that 350mm is to 1800mm; The scope of L is that 400mm is to 2550mm; The scope of Mo is that 170mm is to 1150mm; The yoke wide region is that 50mm is to 700mm.
8. a kind of dry-type transformer for hatch winding iron core according to claim 1 is characterized in that: the apparent size scope of corresponding different capabilities transformer, the scope of a are that 415mm is to 3000mm; The scope of b is that 55mm is to 1000mm; The scope of c is that 420mm is to 2500mm.
9. a kind of dry-type transformer for hatch winding iron core according to claim 1, it is characterized in that: the high-tension coil of transformer (15), low-voltage coil (13) are outside three iron core column, insulating barrier (14) is in the middle of high-tension coil and low-voltage coil, upper clamping piece (10) and lower clamping piece (11) fastening the last yoke of iron core and following yoke, one side of the high-voltage terminal of drawing (16) yoke on iron core, the another side of the low voltage terminal of drawing (12) yoke on iron core.
10. a kind of dry-type transformer for hatch winding iron core according to claim 1 is characterized in that: the kind and the capacity of relevant dry-type transformer, and three-phase F level epoxy resin dry type transformer, capacity is at 30KVA～3150KVA; The non-insulating dry type transformer of sealing of H level NOMEX impregnated, capacity is at 30KVA～3150KVA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100121699A CN101350246A (en) | 2007-07-19 | 2007-07-19 | Dry type transformer for hatch winding iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100121699A CN101350246A (en) | 2007-07-19 | 2007-07-19 | Dry type transformer for hatch winding iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101350246A true CN101350246A (en) | 2009-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100121699A Withdrawn CN101350246A (en) | 2007-07-19 | 2007-07-19 | Dry type transformer for hatch winding iron core |
Country Status (1)
| Country | Link |
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| CN (1) | CN101350246A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477451A (en) * | 2020-05-29 | 2020-07-31 | 重庆望变电气（集团）股份有限公司 | Assembly process of folding iron core and coil of dry-type transformer |
| CN111477452A (en) * | 2020-05-29 | 2020-07-31 | 重庆望变电气（集团）股份有限公司 | Production process of folding iron core for dry-type transformer |
-
2007
- 2007-07-19 CN CNA2007100121699A patent/CN101350246A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477451A (en) * | 2020-05-29 | 2020-07-31 | 重庆望变电气（集团）股份有限公司 | Assembly process of folding iron core and coil of dry-type transformer |
| CN111477452A (en) * | 2020-05-29 | 2020-07-31 | 重庆望变电气（集团）股份有限公司 | Production process of folding iron core for dry-type transformer |
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |