CN101964243A - Transformer coil and casting method thereof - Google Patents
Transformer coil and casting method thereof Download PDFInfo
- Publication number
- CN101964243A CN101964243A CN 201010265709 CN201010265709A CN101964243A CN 101964243 A CN101964243 A CN 101964243A CN 201010265709 CN201010265709 CN 201010265709 CN 201010265709 A CN201010265709 A CN 201010265709A CN 101964243 A CN101964243 A CN 101964243A
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- coil
- hollow pneumatic
- casting
- air channels
- epoxy resin
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Abstract
The invention relates to a transformer coil, comprising a coil body and a plurality of hollow air channels arranged in the coil body. The hollow air channels and the coil body are cast into a whole. The invention also relates to a method of casting the coil, and the method comprises the following steps: casting the plurality of hollow air channels; arranging the hollow air channels in a coiled conductor body; arranging the hollow air channels and the conductor body in a casting die and vacuumizing; and casting the hollow air channels and the conductor body by utilizing epoxy resin. After casting, the conductor body, the outside wall of the hollow air channels and the epoxy resin are molded into a whole, and cavities are formed on the internal wall to serve as heat dissipation channels. As a result, the invention reduces the material cost and the labor cost for casting the transformer coil, solves the difficulties existing in withdrawing air channel plate, and completely eliminates the damage to the coil during the withdrawing process.
Description
Technical field
The present invention relates to a kind of with the dry-type transformer coil of poured with epoxy resin and the method for pouring into a mould this coil.
Background technology
At present, the speed that is easy to cause the transformer coil loss to increase along with the increase of transformer capacity surpasses the speed that the coil area of dissipation increases, and therefore will adopt the mode as air flue is set to increase area of dissipation after the capacity of transformer is increased to a certain degree.
With reference to application number is that 200610019248.8 Chinese patent " high-low voltage whole coil dry transformer " and application number are that 200620074221.4 Chinese patent " 10KV dry-type transformer new coil structure " all discloses it be provided with corresponding heat radiation air flue between high-tension coil and low-voltage coil.But, the pouring type of this type of transformer coil generally is by when the poured with epoxy resin coil body in the prior art, placement forms heat dissipation channel then as the air flue plate of a molded coil body mold part, the air flue plate must be extracted in coil body behind the forming and hardening.Like this, the product of different model can need different air flue board molds, has increased production cost; In addition, also increased the technical process of pulling out the air flue plate behind the forming and hardening, must hold the time period of withdrawing pattern when pulling out the air flue plate, in a single day time hold and forbidden can encounter difficulties when withdrawing pattern, and when pulling out the air flue plate, damage coil surface easily, quality to coil is brought damage, even directly causes scrapping of coil.
Summary of the invention
The invention provides a kind of dry-type transformer coil with poured with epoxy resin.
For achieving the above object, the technical solution used in the present invention is:
A kind of transformer coil comprises coil body, is arranged on a plurality of hollow pneumatic ducts of described coil body inside, and described hollow pneumatic duct and described coil body are one by moulding by casting.
Preferably, a plurality of described hollow pneumatic ducts are evenly distributed in the inside of described coil body.
Preferably, the cross section of the mouth of pipe bore of described hollow pneumatic duct is square.
Of the present inventionly also provide a kind of method of pouring into a mould this coil.
For achieving the above object, the technical solution used in the present invention is:
This method is carried out according to the following steps:
(1), a plurality of hollow pneumatic ducts of cast;
(2), a plurality of described hollow pneumatic ducts are placed in the wire body that winds, after in casting mold, described hollow pneumatic duct and wire body being evacuated to vacuum, use epoxy resin that described hollow pneumatic duct and wire body are poured into a mould, described wire body, hollow pneumatic duct and molding for epoxy resin were one after cast finished.
Preferably, the hollow pneumatic duct adopts 30%～39% epoxy resin, 60%～69% alkali-free not to have wax glass fibre and the cast of 1% flexibilizer.
Because technique scheme utilization, the present invention compared with prior art has following advantage: material and cost of labor when the present invention had both reduced the transformer coil cast, solved existing difficulty when carrying out air flue plate withdrawing pattern again, thoroughly got rid of when carrying out withdrawing pattern damage coil.
Description of drawings
Accompanying drawing 1 is the cutaway view schematic diagram of transformer coil of the present invention;
Accompanying drawing 2 is the vertical view schematic diagram of transformer coil of the present invention;
Accompanying drawing 3 is the cross sectional representation of hollow pneumatic duct of the present invention.
Wherein: 1, coil body 2, hollow pneumatic duct 3, heat dissipation channel.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
A kind of transformer coil as shown in Figure 1.Wherein, transformer coil by coil body 1 by wire body and poured with epoxy resin moulding, the pourable as required one-tenth different shape of coil body 1: as circular, oval, square and trapezoidal etc.Inside in coil body 1 axially is provided with a plurality of hollow pneumatic ducts 2 along it, and a plurality of hollow pneumatic ducts 2 are evenly distributed in the coil body 1.Wherein, the cross section of hollow pneumatic duct 2 calibers is the rectangle of being with fillet or trapezoidal.Coil body 1 is set to annular in the present embodiment, and 2 of hollow pneumatic ducts are along the average inside that is distributed in annular coil body 1 of same circumference, as shown in Figure 2.The pipeline of hollow pneumatic duct 2 is promptly as the heat dissipation channel 3 of transformer coil.
Below specifically set forth the method for operation of present embodiment:
At first, pour into a mould a plurality of hollow pneumatic ducts 2.In the present embodiment, the hollow pneumatic duct adopts 39% epoxy resin, 60% alkali-free not to have wax glass fibre and the cast of 1% flexibilizer, and by the spontaneous curing moulding.The shape of the cross section of hollow pneumatic duct 2 calibers can be adjusted when cast hollow pneumatic duct 2 according to actual needs, and the cross section of hollow pneumatic duct 2 calibers is the rectangle of band fillet, as shown in Figure 3.
Then, a plurality of hollow pneumatic ducts 2 are placed in the wire body that winds, and do suitable arranging and insulating protection, after sending into pouring can hollow pneumatic duct 2 and wire body are evacuated to vacuum, getting rid of the air in the hollow pneumatic duct 2 to reach the inside and outside pressure reduction of air flue tube wall like this is zero, prevent the pneumatic duct cracking, use epoxy resin centering air deferent 2 and wire body to pour into a mould then.After coil body 1 moulding, the interior conduit of hollow pneumatic duct 2 has just formed the heat dissipation channel 3 of transformer coil, and the tube wall of hollow pneumatic duct 2 has been owing to itself also adopted the epoxy resin same with coil body 1, and hollow pneumatic duct 2 just becomes the part of coil body 1 after the moulding.
Like this, need not the air flue plate of the heat dissipation channel of moulding originally 3 after the transformer coil moulding extracts again, directly just finished the one cast of coil body 1 and hollow pneumatic duct 2, both reduced this road technology of withdrawing pattern, avoided causing the damage of transformer coil inner surface again, reduced the probability that substandard products occur because of withdrawing pattern.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. transformer coil is characterized in that: comprise coil body, be arranged on a plurality of hollow pneumatic ducts of described coil body inside, described hollow pneumatic duct and described coil body are one by moulding by casting.
2. a kind of transformer coil according to claim 1 is characterized in that: a plurality of described hollow pneumatic ducts are evenly distributed in described coil body inside.
3. a kind of transformer coil according to claim 1 is characterized in that: the cross section of the mouth of pipe bore of described hollow pneumatic duct is square.
One kind the cast transformer coil as claimed in claim 1 method, it is characterized in that: this method is carried out according to the following steps:
(1), a plurality of hollow pneumatic ducts of cast;
(2), a plurality of described hollow pneumatic ducts are placed in the wire body that winds, after in casting mold, described hollow pneumatic duct and wire body being evacuated to vacuum, use epoxy resin that described hollow pneumatic duct and wire body are poured into a mould, described wire body, hollow pneumatic duct and molding for epoxy resin were one after cast finished.
5. pouring procedure according to claim 4 is characterized in that: described hollow pneumatic duct adopts 30%～39% epoxy resin, 60%～69% alkali-free not to have wax glass fibre and the cast of 1% flexibilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265709 CN101964243A (en) | 2010-08-30 | 2010-08-30 | Transformer coil and casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010265709 CN101964243A (en) | 2010-08-30 | 2010-08-30 | Transformer coil and casting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101964243A true CN101964243A (en) | 2011-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010265709 Pending CN101964243A (en) | 2010-08-30 | 2010-08-30 | Transformer coil and casting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101964243A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360924A (en) * | 2011-08-01 | 2012-02-22 | 保定天威集团有限公司 | Air duct structure for cast coil and manufacturing method for air duct structure |
| CN104157444A (en) * | 2014-08-26 | 2014-11-19 | 镇江天力变压器有限公司 | Air channel structure of epoxy cast dry-type transformer |
| CN105321705A (en) * | 2015-10-14 | 2016-02-10 | 国家电网公司 | Pouring technology for dry-type transformer coils |
| CN107359048A (en) * | 2017-08-10 | 2017-11-17 | 上海克林技术开发有限公司 | A kind of massive coil insulation pouring device and its application method |
| CN112248330A (en) * | 2020-10-12 | 2021-01-22 | 中车株洲电机有限公司 | Method for casting double outlet coils at lower part of transformer and bottom plate structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129938A (en) * | 1975-08-25 | 1978-12-19 | Hariolf Hagenbucher | Method of making tubular coils with cooling and insulating channels |
| CN1615530A (en) * | 2001-12-21 | 2005-05-11 | Abbt&D技术有限公司 | Integrated cooling duct for resin-encapsulated distribution transformer coils |
| CN201084523Y (en) * | 2007-06-20 | 2008-07-09 | 韩军 | An epoxy-potted transformer coil with an inner outlet copper bus ribbon cable |
| CN201498332U (en) * | 2009-09-09 | 2010-06-02 | 泰安隆昌广变压器有限公司 | Dry transformer coil structure |
| CN201796722U (en) * | 2010-08-30 | 2011-04-13 | 施耐德(苏州)变压器有限公司 | Transformer coil |
-
2010
- 2010-08-30 CN CN 201010265709 patent/CN101964243A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129938A (en) * | 1975-08-25 | 1978-12-19 | Hariolf Hagenbucher | Method of making tubular coils with cooling and insulating channels |
| CN1615530A (en) * | 2001-12-21 | 2005-05-11 | Abbt&D技术有限公司 | Integrated cooling duct for resin-encapsulated distribution transformer coils |
| CN201084523Y (en) * | 2007-06-20 | 2008-07-09 | 韩军 | An epoxy-potted transformer coil with an inner outlet copper bus ribbon cable |
| CN201498332U (en) * | 2009-09-09 | 2010-06-02 | 泰安隆昌广变压器有限公司 | Dry transformer coil structure |
| CN201796722U (en) * | 2010-08-30 | 2011-04-13 | 施耐德(苏州)变压器有限公司 | Transformer coil |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360924A (en) * | 2011-08-01 | 2012-02-22 | 保定天威集团有限公司 | Air duct structure for cast coil and manufacturing method for air duct structure |
| CN102360924B (en) * | 2011-08-01 | 2013-01-09 | 保定天威集团有限公司 | Air duct structure for cast coil and manufacturing method for air duct structure |
| CN104157444A (en) * | 2014-08-26 | 2014-11-19 | 镇江天力变压器有限公司 | Air channel structure of epoxy cast dry-type transformer |
| CN105321705A (en) * | 2015-10-14 | 2016-02-10 | 国家电网公司 | Pouring technology for dry-type transformer coils |
| CN107359048A (en) * | 2017-08-10 | 2017-11-17 | 上海克林技术开发有限公司 | A kind of massive coil insulation pouring device and its application method |
| CN112248330A (en) * | 2020-10-12 | 2021-01-22 | 中车株洲电机有限公司 | Method for casting double outlet coils at lower part of transformer and bottom plate structure |
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Application publication date: 20110202 |