CN201215757Y - Three-phase oil immersion electric power transformer - Google Patents
Three-phase oil immersion electric power transformer Download PDFInfo
- Publication number
- CN201215757Y CN201215757Y CNU200820024918XU CN200820024918U CN201215757Y CN 201215757 Y CN201215757 Y CN 201215757Y CN U200820024918X U CNU200820024918X U CN U200820024918XU CN 200820024918 U CN200820024918 U CN 200820024918U CN 201215757 Y CN201215757 Y CN 201215757Y
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- coil
- power transformer
- voltage coil
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- phase oil
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Abstract
The utility model relates to a three-phase oil-immersed power transformer, which comprises an iron core with an elliptical cross section, a high-voltage coil and a low-voltage coil which are sleeved on the iron core column, wherein both the high-voltage coil and the low-voltage coil adopt metal foil to coil elliptical structures. The scheme can lighten the weight of the iron core and the ability of resisting radial short circuit force is strong.
Description
Technical field:
The utility model relates to a kind of three-phase oil-immersed power transformer.
Background technology:
At present the iron core of oil-immersed power transformer and coil shape have circle, rectangle and oval three kinds, circular coil bears radially ability the best of short-circuit force, square coil then need add radially fastening, can prevent that just the coil that produces because of the effect of short-circuit force radially is loose; But square coil is saved iron core weight than circular coil again.Oval coil combines the characteristics of above-mentioned two kinds of coils, can reduce iron core weight as square coil, can resemble circular coil again and have enough flexibility with opposing short-circuit force radially, and need not stepping up outside the plus.But directly turn to oval coil with lead, particularly multiple conducting wires coiling in parallel is when the corner is arrived in coiling, need firmly beat, often destroy the insulation of lead, the reliability of transformer is affected, and substantially exceeded the circular coil structure during worker.
Summary of the invention:
The purpose of this utility model is exactly at the existing in prior technology deficiency, and provides a kind of technical scheme of three-phase oil-immersed power transformer, this scheme can alleviate weight unshakable in one's determination, resists that radially the short-circuit force ability is strong.
This programme is realized by following technical measures: comprise that cross section is oval-shaped iron core, be sleeved on high-tension coil and low-voltage coil on this core limb, described high-voltage coil and low-voltage coil all adopts metal forming to turn to ellipsoidal structure.
Adopting cross section is oval-shaped iron core, can reduce total height and total length unshakable in one's determination, has reduced weight unshakable in one's determination, has reduced the no-load loss of transformer; Adopt oval foil coil, the winding magnetomotive force is evenly distributed along the winding height, ampere-turn equilibrium is good, and laterally magnetic potential is few, and the short circuit axial force is little, thereby it is strong to bear short-circuit capacity.Cross section unshakable in one's determination adopts optimal design, is approximately oval, and the high-low pressure both sides are dissymmetrical structure, remove the one-level lamination in low-pressure side, reserves the lead-in wire metal row insulation distance with the low pressure foil coil.High-voltage coil and low-voltage coil adopts Copper Foil or aluminium foil coiling to form.
Low-voltage coil adopts the coiling of copper (aluminium) paper tinsel to form, the easier coiling of cylindrical layer winding in the past of foil coil ratio, its original and around multiple conducting wires become a copper (aluminium) paper tinsel, when low-tension current is big especially, can produce incomplete transposition with stranded conductor, the circulation of formation, cause bigger supplementary load loss, this situation is not when a paper tinsel sectional area reaches when requiring, can adopt two paper tinsels side by side or and folded, be called the two paper tinsels of low-voltage coil around.Layer insulation adopts one deck polyester film point gummed paper, and layer insulation is than the wide 40mm of paper tinsel width, and two ends end insulation is with paper tinsel, layer insulation coiling.After coil carried out heating, drying, epoxide-resin glue fusing and paper tinsel on the layer insulation bonded together, and make coil become a firm integral body.
High-tension coil directly is wound on the paper tinsel formula low-voltage coil, and as high and low pressure intercoil insulation oil duct, adopting wide rectangular paper tinsel band coiling is segmented layered oval coil with corrugated board, if the paper tinsel surface scribbles insulating varnish, then interlayer does not need layer insulation; If when the naked enamelled coating of paper tinsel surface, layer insulation adopts polypropylene tape or polyester film.Adopt cushion block to support between section and the section, cushion block is through on the stay, to guarantee the insulation distance between section and the section.Employing lead or paper tinsel band are connected between section and the section.
Described high-voltage coil and low-voltage coil metal foil surface also can all scribble the insulation paint film, is used as layer insulation.
The utility model compared with prior art has following advantage:
(1) all section temperatures distributions of line segment are more even, improved the cooling condition of winding.
(2) the winding magnetomotive force is evenly distributed along the winding height, and ampere-turn equilibrium is good, and laterally magnetic potential is few, and the short circuit axial force is little, thereby it is strong to bear short-circuit capacity.
(3) turn-to-turn capacitance is evenly distributed along winding, has increased the superpotential stability of winding impact.
(4) bigger barred window activity coefficient is arranged.
(5) because the design feature of oval foil coil has reduced total height unshakable in one's determination and total length, reduce weight unshakable in one's determination, reduced the no-load loss of transformer.
Few when (6) the winding lead-out wire is with intersegmental quantity that is connected and worker, be convenient to mechanization.
Description of drawings:
Fig. 1 is the structural representation of the utility model embodiment.
Among the figure, 1 is low-voltage coil, and 2 is unshakable in one's determination, and 3 are the insulation oil duct, and 4 is high-tension coil, and 5 is cushion block, and 6 is stay.
Embodiment:
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.
As shown in Figure 1, three-phase oil-immersed power transformer comprises that cross section is oval-shaped unshakable in one's determination 2, is wrapped in the metal forming coiling on this iron core 2.Its assembling process is: move on to fixing back placement corrugation insulation oil duct 3, stay 6, cushion block 5 on the high blocking formula coil winding machine after low-voltage coil 1 coiling, the coiling high-tension coil 4 then, adopt lead or paper tinsel band to be connected between winding process stage casing and the section, load onto anchor clamps after coiling finishes and enter and compress in the vacuum tank and drying.Be inserted in after the coil shaping is qualified in unshakable in one's determination 2, and place core insulation up and down, then iron core is stepped up, in the fuel tank of packing into, various accessories are installed on case lid at last.
Claims (6)
1. three-phase oil-immersed power transformer, comprise that cross section is oval-shaped iron core (2), is sleeved on high-tension coil and low-voltage coil on this core limb, its feature: described high-voltage coil and low-voltage coil (4) and (1) all adopt metal forming to turn to ellipsoidal structure.
2. three-phase oil-immersed power transformer according to claim 1 is characterized in that: described high-tension coil (4) turns to segmented layered structure, supports with cushion block (5) between section and the section, and this cushion block is through on the stay (6).
3. three-phase oil-immersed power transformer according to claim 1 and 2 is characterized in that: described high-tension coil (4) metal foil surface scribbles the insulation paint film.
4. three-phase oil-immersed power transformer according to claim 1 and 2 is characterized in that: described high-voltage coil and low-voltage coil (4) and (1) metal foil surface all scribble the insulation paint film.
5. three-phase oil-immersed power transformer according to claim 1 is characterized in that: in described low-voltage coil (1) is wound on, outside high-tension coil (4) is wound on, between high-tension coil (4) and low-voltage coil (1) insulation oil duct (3) is arranged.
6. three-phase oil-immersed power transformer according to claim 5 is characterized in that: described insulation oil duct (3) is made for corrugated board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820024918XU CN201215757Y (en) | 2008-07-04 | 2008-07-04 | Three-phase oil immersion electric power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820024918XU CN201215757Y (en) | 2008-07-04 | 2008-07-04 | Three-phase oil immersion electric power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215757Y true CN201215757Y (en) | 2009-04-01 |
Family
ID=40520960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820024918XU Expired - Fee Related CN201215757Y (en) | 2008-07-04 | 2008-07-04 | Three-phase oil immersion electric power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215757Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964244A (en) * | 2010-09-02 | 2011-02-02 | 思源电气股份有限公司 | Reactor with long-circle iron core and coil structure |
| CN102881423A (en) * | 2012-10-23 | 2013-01-16 | 中电电气(江苏)股份有限公司 | Main transformer lower-voltage foil structure and implementation method thereof |
| CN103050251A (en) * | 2012-12-25 | 2013-04-17 | 保定天威集团(江苏)五洲变压器有限公司 | Voltage sharing ball structure of oiled paper condenser type transformer bushing |
| CN104867665A (en) * | 2015-06-02 | 2015-08-26 | 国家电网公司 | Tangent circle type coil and manufacturing method thereof |
-
2008
- 2008-07-04 CN CNU200820024918XU patent/CN201215757Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964244A (en) * | 2010-09-02 | 2011-02-02 | 思源电气股份有限公司 | Reactor with long-circle iron core and coil structure |
| CN102881423A (en) * | 2012-10-23 | 2013-01-16 | 中电电气(江苏)股份有限公司 | Main transformer lower-voltage foil structure and implementation method thereof |
| CN102881423B (en) * | 2012-10-23 | 2015-11-18 | 中电电气(江苏)股份有限公司 | A kind of main transformer lower-voltage foil structure and its implementation |
| CN103050251A (en) * | 2012-12-25 | 2013-04-17 | 保定天威集团(江苏)五洲变压器有限公司 | Voltage sharing ball structure of oiled paper condenser type transformer bushing |
| CN104867665A (en) * | 2015-06-02 | 2015-08-26 | 国家电网公司 | Tangent circle type coil and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090401 Termination date: 20110704 |