CN204242769U - A kind of oil-filled transformer - Google Patents
A kind of oil-filled transformer Download PDFInfo
- Publication number
- CN204242769U CN204242769U CN201420642284.XU CN201420642284U CN204242769U CN 204242769 U CN204242769 U CN 204242769U CN 201420642284 U CN201420642284 U CN 201420642284U CN 204242769 U CN204242769 U CN 204242769U
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- iron core
- oil
- wire
- oxhorn pad
- filled transformer
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Abstract
The utility model relates to a kind of oil-filled transformer, belongs to field of electrical equipment.Described oil-filled transformer comprises iron core, the winding be wound on described iron core; Described iron core comprises iron core frame, is coated on the silicon steel sheet in described iron core frame table face, the epoxy glue of sealing in described iron core frame side, the oil guide groove be arranged on described iron core; Described winding comprise at least two and around wire, be fastened on the oxhorn pad of described wire transposition place, described oxhorn pad offers stream oil groove.The utility model is 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; Again by being opened in the stream oil groove on the face of adjacent conductors, while can ensureing wire consolidation, the thermal diffusivity of wire is better.
Description
Technical field
The utility model relates to field of electrical equipment, particularly a kind of oil-filled transformer.
Background technology
Transformer utilizes the principle of electromagnetic induction to change the device of alternating voltage, and main member is primary coil, secondary coil and iron core.Major function has: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing etc.Can be divided into by purposes: distribution transformer, power transformer, full-sealed transformer, combined transformer, dry-type transformer, oil-filled transformer, single-phase transformer, furnace transformer, rectifier transformer etc.
Transformer Winding is transformer " heart " part, and the quality of winding will directly affect the performance of product.Loss can be changed this heat at transformer run duration, thus cause transformer to generate heat and temperature raises, as winding internal cooling oil duct is smooth, cause ageing of insulation to affect use transformer useful life.
When in Transformer Winding winding process, must replace during several paralleled conductor, when two wires rise or decline, have one section unsettled, namely wire and vertical spacer depart from.Must tamp with oxhorn pad, and closely will press close to conductive line surfaces, guarantee the consolidation of wire.
Existing iron core frame is except lower yoke portion, and the both ends of the surface of remainder all adopt epoxy glue sealing.
Realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
Bring impact to the heat radiation of conductive line surfaces, particularly the number of turn replaces many coils less, oxhorn pad with more, its impact is just larger.
Cannot flow out from other position when oil flows through after iron core is infiltrated in lower yoke portion, after namely oil flows to core interior, namely become region of bypassed oil, 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.
Summary of the invention
In order to solve the problem of prior art, the utility model embodiment provides a kind of oil-filled transformer.Described technical scheme is as follows:
The utility model embodiment provides a kind of oil-filled transformer, and described oil-filled transformer comprises iron core, the winding be wound on described iron core;
Described iron core comprises iron core frame, is coated on the silicon steel sheet in described iron core frame table face, the epoxy glue of sealing in described iron core frame side, the oil guide groove be arranged on described iron core; Described iron core frame one end has upper yoke portion, and the other end has lower yoke portion;
Described winding comprise at least two and around wire, be fastened on the oxhorn pad of described wire transposition place, described oxhorn pad offers stream oil groove; Described oxhorn pad comprises interior oxhorn pad and outer oxhorn pad, and described interior oxhorn pad is arranged on the inner side of described wire, and described outer oxhorn pad is arranged on the outside of described wire, and wire compresses by described interior oxhorn pad and described outer oxhorn pad jointly.
Particularly, described stream oil groove is opened on the side of described oxhorn pad perpendicular to wire axis.
Particularly, on the described stream oil groove positive side perpendicular to wire axis that is opened in described oxhorn pad and dorsal surface.
Particularly, described stream oil groove is opened on the face of adjacent conductors.
Particularly, described wire is eight.
Particularly, described iron core frame folds with 25 amorphous alloy strips and forms.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
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; Again by being opened in the stream oil groove on the face of adjacent conductors, while can ensureing wire consolidation, the thermal diffusivity of wire is better.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the iron core that the utility model embodiment provides;
Fig. 2 is the structural representation of the winding that the utility model embodiment provides.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
The utility model embodiment provides a kind of oil-filled transformer, and see Fig. 1, described oil-filled transformer comprises iron core 1, the winding 2 be wound on iron core 1.
Particularly, iron core 1 comprise iron core frame 11, be coated on the silicon steel sheet 12 of iron core frame 11 inner surface and outer surface, epoxy glue 13, the oil guide groove 14 of sealing in the side of iron core frame 11 and silicon steel sheet 12.
Further, iron core frame 11 one end has upper yoke portion 111, and the other end has lower yoke portion 112.Iron core frame 11 directly can be reeled by amorphous band and be formed, and the width of amorphous band is 140 ~ 220mm.Iron core frame 11 adopts the amorphous band of certain length to fold and forms, and is one group with multi-disc amorphous alloy strips.
Preferably, iron core frame 11 folds with 25 amorphous alloy strips and forms, and adopts Special iron core mold to fold into the first iron core ring, is then one group with multi-disc amorphous alloy strips again in the outside of the first iron core ring and folds into the second iron core ring; By that analogy, constitute iron core frame 11 by organizing iron core ring more.The seam often organizing iron core ring is all positioned at place of lower yoke portion 112, 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.
More preferably, the seam of iron core ring adopts the mode of fan-shaped overlap joint, seam areas can be made as far as possible to stagger, 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 utility model embodiment can be three-phase three-limb iron core also can be three-phase five-limb iron core.
Particularly, silicon steel sheet 12 is coated on inner surface and the outer surface of iron core frame 11.Silicon steel sheet 12 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.
Particularly, epoxy glue 13 sealing is in the both ends of the surface except lower yoke portion 112 of iron core frame 11 and silicon steel sheet 12, and namely the both ends of the surface in lower yoke portion 112 do not need sealing epoxy glue 13.Epoxy glue 13 sealing, in the both ends of the surface of iron core frame 11 and silicon steel sheet 12, refers to that epoxy glue 13 sealing is on the side of iron core frame 11 and silicon steel sheet 12, can live the side sealing of iron core frame 11 and silicon steel sheet 12.The thickness of epoxy glue 13 is 2 ~ 3mm.
Preferably, the thickness of epoxy glue 13 is 2mm.Adopt epoxy glue 13 sealing in the utility model embodiment in the both ends of the surface of iron core frame 11 and silicon steel sheet 12, can effectively solidify iron core frame 11, 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 problem by assembly technology.
Further, upper yoke portion 111 offers oil guide groove 14, the upper yoke portion 111 that it should be noted that the utility model embodiment offers oil guide groove 14 is actual refers to that in upper yoke portion 14, leave a fixed gap does not have sealing epoxy glue 13, does not have the gap of sealing epoxy glue 13 just to define oil guide groove 14.Preferably, oil guide groove 14 is positioned at the middle part in upper yoke portion 111.The width of oil guide groove 14 is being determined according to the concrete size of iron core frame 11, and preferably, the width of oil guide groove 14 is 10 ~ 30mm.Oil guide groove 14 can enable the oily stream being infiltrated iron core by lower yoke portion 112 be flowed out smoothly by oil guide groove 14, 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.
Particularly, see Fig. 2, winding 2 comprises wire 21, is connected the oxhorn pad 22 arranged with wire 21.
Further, wire 21 is at least two, these two and walk around in journey, will inevitably produce transposition, the wire 21 being namely positioned at internal layer passes and becomes outer and continue coiling, is positioned at outer field wire 21 and pierces into and become internal layer and continue coiling.
Preferably, in the present embodiment, wire is eight, like this and around wire thicker, oxhorn pad just must be used at wire to compress around transposition.Unsettled in order to avoid at transposition wire 21, oxhorn pad is fastened on wire 21 transposition, wire 21 from the opening of oxhorn pad through being compacted.
In detail, oxhorn pad can be made up of interior oxhorn pad 221 and outer oxhorn pad 222, and interior oxhorn pad 221 is arranged on the inner side of wire 21, and outer oxhorn pad 222 is arranged on the outside of wire 21, interior oxhorn pad 222 and outer oxhorn pad 222 acting in conjunction compacting wire 21.
Interior oxhorn pad 221 and outer oxhorn pad 222 offer stream oil groove 220, and cold oil can through stream oil groove 220 to cool the coil being positioned at oxhorn pad.
Preferably, flow oil groove 220 to be opened on the side being generally perpendicular to wire 21 axis of described oxhorn pad.Stream oil groove 220 can be multiple, and these multiple stream oil grooves 220 arrange along the circular arc of the small curvature radius of oxhorn pad.
More preferably, stream oil groove 220 is in order to better cool wire 21, and cold oil is wanted to discharge smoothly, therefore on the positive side perpendicular to wire 21 axis that stream oil groove 220 is opened in described oxhorn pad and dorsal surface.Namely the stream oil groove 220 that cold oil can be positioned at positive side certainly flows to and is positioned at the stream oil groove 220 of dorsal surface, and the stream oil groove 220 that also certainly can be positioned at dorsal surface flows to the stream oil groove 220 being positioned at positive side.
More preferably, in order to make oxhorn pad can more consolidation by wire 21 compacting, the edge of oxhorn pad opening is closed in the position of stream oil groove 220, i.e. on the face of adjacent conductors 21.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
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; Again by being opened in the stream oil groove on the face of adjacent conductors, while can ensureing wire consolidation, the thermal diffusivity of wire is better.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1. an oil-filled transformer, described oil-filled transformer comprises iron core, the winding be wound on described iron core; It is characterized in that,
Described iron core comprises iron core frame, is coated on the silicon steel sheet in described iron core frame table face, the epoxy glue of sealing in described iron core frame side, the oil guide groove be arranged on described iron core; Described iron core frame one end has upper yoke portion, and the other end has lower yoke portion;
Described winding comprise at least two and around wire, be fastened on the oxhorn pad of described wire transposition place, described oxhorn pad offers stream oil groove; Described oxhorn pad comprises interior oxhorn pad and outer oxhorn pad, and described interior oxhorn pad is arranged on the inner side of described wire, and described outer oxhorn pad is arranged on the outside of described wire, and wire compresses by described interior oxhorn pad and described outer oxhorn pad jointly.
2. according to the oil-filled transformer described in claim 1, it is characterized in that, described stream oil groove is opened on the side of described oxhorn pad perpendicular to wire axis.
3. according to the oil-filled transformer described in claim 1, it is characterized in that, on the positive side perpendicular to wire axis that described stream oil groove is opened in described oxhorn pad and dorsal surface.
4. according to the oil-filled transformer described in claim 1, it is characterized in that, described stream oil groove is opened on the face of adjacent conductors.
5. according to the oil-filled transformer described in claim 1, it is characterized in that, described wire is eight.
6. oil-filled transformer according to claim 1, is characterized in that, described iron core frame folds with 25 amorphous alloy strips and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642284.XU CN204242769U (en) | 2014-11-01 | 2014-11-01 | A kind of oil-filled transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642284.XU CN204242769U (en) | 2014-11-01 | 2014-11-01 | A kind of oil-filled transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204242769U true CN204242769U (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420642284.XU Expired - Fee Related CN204242769U (en) | 2014-11-01 | 2014-11-01 | A kind of oil-filled transformer |
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| Country | Link |
|---|---|
| CN (1) | CN204242769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107633940A (en) * | 2016-07-19 | 2018-01-26 | 江苏中天伯乐达变压器有限公司 | It is unshakable in one's determination and there is the transformer unshakable in one's determination |
-
2014
- 2014-11-01 CN CN201420642284.XU patent/CN204242769U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107633940A (en) * | 2016-07-19 | 2018-01-26 | 江苏中天伯乐达变压器有限公司 | It is unshakable in one's determination and there is the transformer unshakable in one's determination |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20151101 |
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| EXPY | Termination of patent right or utility model |