CN108987053A - A kind of oil-immersed transformer - Google Patents
A kind of oil-immersed transformer Download PDFInfo
- Publication number
- CN108987053A CN108987053A CN201710407383.8A CN201710407383A CN108987053A CN 108987053 A CN108987053 A CN 108987053A CN 201710407383 A CN201710407383 A CN 201710407383A CN 108987053 A CN108987053 A CN 108987053A
- Authority
- CN
- China
- Prior art keywords
- iron core
- oil
- conducting wire
- oxhorn pad
- stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/303—Clamping coils, windings or parts thereof together
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The present invention relates to a kind of oil-immersed transformers, belong to field of electrical equipment.The winding that the oil-immersed transformer includes iron core, is wound on the iron core；The iron core includes epoxy glue in iron core frame side of iron core frame, the silicon steel sheet for being coated on iron core frame surface, sealing, the oil guide groove that is arranged on the iron core；The winding include at least two and around conducting wire, the oxhorn pad that is fastened at the wire transposition, offer stream oil groove on the oxhorn pad.The present invention is by opening up oil guide groove in upper yoke portion, the oil stream for penetrating into iron core by lower yoke portion is smoothly flowed out by oil guide groove, guarantee that oil circuit is smooth, effectively prevent the presence of iron core region of bypassed oil, be conducive to iron core heat dissipation, so as to avoid a series of excessively high possible harm of institute of iron core local temperature；Further through the stream oil groove on the face for being provided with adjacent conductors, while capable of guaranteeing conducting wire consolidation, the thermal diffusivity of conducting wire is preferable.
Description
Technical field
The present invention relates to field of electrical equipment, in particular to a kind of oil-immersed transformer.
Background technique
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary
Grade coil and iron core.Major function has: voltage transformation, current transformation, impedance transformation, isolation, pressure stabilizing etc..It can divide by purposes
Are as follows: distribution transformer, power transformer, full-sealed transformer, combined transformer, dry-type transformer, oil-immersed transformer, list
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.In transformation
Loss can be changed this heat during running by device, be increased so as to cause transformer fever and temperature, such as cooling oil inside winding
Road is unsmooth, and insulation ag(e)ing is caused to influence to use transformer service life.
In transformer winding winding process, when several paralleled conductor, must replace, and rise or fall in two conducting wires
When, there is one section vacantly, i.e., conducting wire and vertical spacer are detached from.It must be tamped, and closely pasted with conductive line surfaces with oxhorn pad
Closely, ensure the consolidation of conducting wire.
For existing iron core frame in addition to lower yoke portion, the both ends of the surface of rest part are all made of epoxy glue sealing.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
Influence, especially the number of turns is brought to the heat dissipation of conductive line surfaces to replace less more coils, oxhorn pad with it is more,
It influences just bigger.
It can not be flowed out from other positions after oil stream penetrates into iron core by lower yoke portion, i.e., after oil stream enters core interior,
Become region of bypassed oil, core interior cannot form clear and coherent oil circuit, cause iron core heat dissipation difficult, the drawbacks such as temperature height.
Summary of the invention
In order to solve problems in the prior art, the embodiment of the invention provides a kind of oil-immersed transformers.The technical side
Case is as follows:
The embodiment of the invention provides a kind of oil-immersed transformer, the oil-immersed transformer includes iron core, is wound in the iron
Winding on core；
The iron core include iron core frame, the silicon steel sheet for being coated on iron core frame surface, sealing iron core frame side ring
Oxygen glue, the oil guide groove being arranged on the iron core；Iron core frame one end has upper yoke portion, and the other end has lower yoke portion；
The winding include at least two and around conducting wire, the oxhorn pad that is fastened at the wire transposition, on the oxhorn pad
Offer stream oil groove；The oxhorn pad includes interior oxhorn pad and outer oxhorn pad, and the interior oxhorn pad is arranged in the conducting wire
The outside of the conducting wire is arranged in side, the outer oxhorn pad, and the interior oxhorn pad and the outer oxhorn pad jointly compress conducting wire.
Specifically, the stream oil groove is provided with the oxhorn pad perpendicular on the side of conducting wire axis.
Specifically, it is described stream oil groove be provided with the oxhorn pad perpendicular on the positive side of conducting wire axis and dorsal surface.
Specifically, the stream oil groove is provided on the face of adjacent conductors.
Specifically, the conducting wire is eight.
Specifically, the iron core frame is folded with 25 amorphous alloy strips.
Technical solution provided in an embodiment of the present invention has the benefit that
By opening up oil guide groove in upper yoke portion, enable the oil stream for penetrating into iron core by lower yoke portion smooth by oil guide groove
Outflow, guarantee oil circuit it is smooth, effectively prevent the presence of iron core region of bypassed oil, be conducive to iron core heat dissipation, so as to avoid iron core
A series of excessively high possible harm of institute of local temperature；Further through the stream oil groove on the face for being provided with adjacent conductors, Neng Goubao
While demonstrate,proving conducting wire consolidation, the thermal diffusivity of conducting wire is preferable.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of iron core provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of winding provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of oil-immersed transformers, referring to Fig. 1, the oil-immersed transformer include iron core 1,
The winding 2 being wound on iron core 1.
Specifically, iron core 1 includes iron core frame 11, the silicon steel sheet 12 for being coated on 11 the inner surface and the outer surface of iron core frame, sealing
Epoxy glue 13, oil guide groove 14 in the side of iron core frame 11 and silicon steel sheet 12.
Further, 11 one end of iron core frame has upper yoke portion 111, and the other end has lower yoke portion 112.Iron core frame 11
It can directly be wound and be formed by amorphous band, the width of amorphous band is 140~220mm.Iron core frame 11 is using certain length
Amorphous band folds, with multi-disc amorphous alloy strips for one group.
Preferably, iron core frame 11 is folded with 25 amorphous alloy strips, is folded into using dedicated iron core die
Then first iron core ring is stacked for one with multi-disc amorphous alloy strips again in the outside of the first iron core ring and the second iron core ring is made；
And so on, iron core frame 11 is constituted by multiple groups iron core ring.The seam of every group of iron core ring is respectively positioned at lower yoke portion 112, iron core
The seam of ring can be using in-line overlapped mode, can also be using fan-shaped overlapped mode.
It is highly preferred that the seam of iron core ring can be made seam areas be staggered as far as possible, can effectively be changed using fan-shaped overlapped mode
The Distribution of Magnetic Field of kind seam crossing reduces the concentrations of magnetic flux density here, can effectively reduce core loss.Simultaneously using fan
Shape overlapped mode can be such that overlapping part thickness reduces, and can effectively reduce iron core framework product.It needs according to the actual situation, this hair
The iron core of bright embodiment can be three-phase three-limb iron core and be also possible to three-phase five-limb iron core.
Specifically, silicon steel sheet 12 is coated on the inner surface and the outer surface of iron core frame 11.Silicon steel sheet 12 can use magnetic conduction
Functional and high mechanical strength cold pressing grain-oriented Si steel sheet, with a thickness of 0.3mm.
Specifically, both ends of the surface except lower yoke portion 112 in addition to of 13 sealing of epoxy glue in iron core frame 11 and silicon steel sheet 12
On, i.e. the both ends of the surface in lower yoke portion 112 do not need sealing epoxy glue 13.13 sealing of epoxy glue is in iron core frame 11 and silicon steel sheet 12
Both ends of the surface on, refer to that 13 sealing of epoxy glue, can be by iron core frame 11 and silicon steel on the side of iron core frame 11 and silicon steel sheet 12
The side sealing of piece 12 is lived.Epoxy glue 13 with a thickness of 2~3mm.
Preferably, epoxy glue 13 with a thickness of 2mm.Using 13 sealing of epoxy glue in iron core frame 11 in the embodiment of the present invention
It in the both ends of the surface of silicon steel sheet 12, can effectively solidify iron core frame 11, solve the problems, such as more crisp, frangible, drop after amorphous band annealing
The assembly difficulty of low iron core avoids the problem that iron core performance in assembling process is affected by assembly technology.
Further, oil guide groove 14 is offered in upper yoke portion 111, it should be noted that the upper yoke of the embodiment of the present invention
Oil guide groove 14 is offered in portion 111 actually refers to that there are a fixed gaps not to have sealing epoxy glue 13 in upper yoke portion 14, does not have
There is the gap section of sealing epoxy glue 13 to be formed oil guide groove 14.Preferably, oil guide groove 14 is located in upper yoke portion 111
Between position.The width of oil guide groove 14 is being determined according to the specific size of iron core frame 11, it is preferable that the width of oil guide groove 14 is
10~30mm.Oil guide groove 14 can enable by lower yoke portion 112 penetrate into iron core oil stream by oil guide groove 14 smoothly
Outflow is conducive to iron core heat dissipation, the presence of iron core region of bypassed oil is avoided, so as to avoid iron core office to guarantee that oil circuit is smooth
A series of excessively high possible harm of institute of portion's temperature.
Specifically, referring to fig. 2, winding 2 includes conducting wire 21, connect the oxhorn pad 22 being arranged with conducting wire 21.
Further, conducting wire 21 is at least two, this two, and around in the process, will necessarily generate transposition, that is, is located at interior
The conducting wire 21 of layer, which is pierced by, becomes outer layer continuation coiling, pierces into positioned at the conducting wire 21 of outer layer and becomes internal layer continuation coiling.
Preferably, in the present embodiment, conducting wire be eight, in this way and around conducting wire it is thicker, conducting wire and around transposition just
It has to be compressed using oxhorn pad.In order to avoid in the hanging of transposition conducting wire 21, oxhorn pad is fastened on the transposition of conducting wire 21
Place, conducting wire 21 is from the opening of oxhorn pad across being compacted.
In detail, oxhorn pad can be made of interior oxhorn pad 221 and outer oxhorn pad 222, and the interior setting of oxhorn pad 221 is being led
The outside of conducting wire 21,222 collective effect pressure of interior oxhorn pad 222 and outer oxhorn pad is arranged in the inside of line 21, outer oxhorn pad 222
Real conducting wire 21.
Stream oil groove 220 is offered on interior oxhorn pad 221 and outer oxhorn pad 222, cooling oil can pass through stream oil groove 220
To be cooled down to the coil being located in oxhorn pad.
Preferably, stream oil groove 220 be provided with the oxhorn pad on the side of 21 axis of conducting wire.Flow oil groove
220 can be multiple, the circular arc arrangement of these small radius of curvature of multiple stream oil grooves 220 along oxhorn pad.
It is highly preferred that stream oil groove 220 is in order to preferably cool down conducting wire 21, cooling oil is wanted smoothly to arrange
Out, therefore on the positive side and dorsal surface perpendicular to 21 axis of conducting wire that stream oil groove 220 is provided with the oxhorn pad.It is i.e. cooling
Oil can be located at the stream oil groove 220 of dorsal surface from the stream flow direction of oil groove 220 for being located at positive side face, can also be from the stream for being located at dorsal surface
The flow direction of oil groove 220 is located at the stream oil groove 220 of positive side.
It is highly preferred that stream oil groove 220 is positioned proximate to ox in order to enable oxhorn pad is capable of being compacted conducting wire 21 of more consolidation
The edge of angle pad opening, i.e., on the face of adjacent conductors 21.
Technical solution provided in an embodiment of the present invention has the benefit that
By opening up oil guide groove in upper yoke portion, enable the oil stream for penetrating into iron core by lower yoke portion smooth by oil guide groove
Outflow, guarantee oil circuit it is smooth, effectively prevent the presence of iron core region of bypassed oil, be conducive to iron core heat dissipation, so as to avoid iron core
A series of excessively high possible harm of institute of local temperature；Further through the stream oil groove on the face for being provided with adjacent conductors, Neng Goubao
While demonstrate,proving conducting wire consolidation, the thermal diffusivity of conducting wire is preferable.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of oil-immersed transformer, the oil-immersed transformer includes iron core, the winding that is wound on the iron core；Its feature
It is,
The iron core include iron core frame, the silicon steel sheet for being coated on iron core frame surface, sealing iron core frame side ring
Oxygen glue, the oil guide groove being arranged on the iron core；Iron core frame one end has upper yoke portion, and the other end has lower yoke portion；
The winding include at least two and around conducting wire, the oxhorn pad that is fastened at the wire transposition, on the oxhorn pad
Offer stream oil groove；The oxhorn pad includes interior oxhorn pad and outer oxhorn pad, and the interior oxhorn pad is arranged in the conducting wire
The outside of the conducting wire is arranged in side, the outer oxhorn pad, and the interior oxhorn pad and the outer oxhorn pad jointly compress conducting wire.
2. the oil-immersed transformer according to claim 1, which is characterized in that the stream oil groove is provided with the oxhorn pad
Perpendicular on the side of conducting wire axis.
3. the oil-immersed transformer according to claim 1, which is characterized in that the stream oil groove is provided with the oxhorn pad
Perpendicular on the positive side of conducting wire axis and dorsal surface.
4. the oil-immersed transformer according to claim 1, which is characterized in that the stream oil groove is provided with adjacent conductors
On face.
5. the oil-immersed transformer according to claim 1, which is characterized in that the conducting wire is eight.
6. oil-immersed transformer according to claim 1, which is characterized in that the iron core frame is with 25 amorphous alloys
Band folds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407383.8A CN108987053A (en) | 2017-06-02 | 2017-06-02 | A kind of oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407383.8A CN108987053A (en) | 2017-06-02 | 2017-06-02 | A kind of oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108987053A true CN108987053A (en) | 2018-12-11 |
Family
ID=64502659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710407383.8A Pending CN108987053A (en) | 2017-06-02 | 2017-06-02 | A kind of oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108987053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767896A (en) * | 2019-03-06 | 2019-05-17 | 上海置信电气非晶有限公司 | Utilize the low loss transformer of skin effect |
-
2017
- 2017-06-02 CN CN201710407383.8A patent/CN108987053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767896A (en) * | 2019-03-06 | 2019-05-17 | 上海置信电气非晶有限公司 | Utilize the low loss transformer of skin effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181211 |