CN203232797U - Epoxy pouring dry type transformer - Google Patents
Epoxy pouring dry type transformer Download PDFInfo
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- CN203232797U CN203232797U CN 201320170456 CN201320170456U CN203232797U CN 203232797 U CN203232797 U CN 203232797U CN 201320170456 CN201320170456 CN 201320170456 CN 201320170456 U CN201320170456 U CN 201320170456U CN 203232797 U CN203232797 U CN 203232797U
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Abstract
The utility model provides an epoxy pouring dry type transformer which comprises an iron core, a high-voltage coil and a low-voltage coil. The high-voltage coil is an epoxy resin pouring type coil and comprises a wire layer and an encapsulating layer arranged outside the wire layer. The encapsulating layer is of a cylindrical structure without a boss. According to the epoxy pouring dry type transformer, a pouring boss with a branching coil is omitted; compared with an existing dry type transformer with a boss, the epoxy pouring dry type transformer can not only save the resin amount used for the coils, but also greatly increase effective heat dissipation area of the transformer coils simultaneously, improve heat dissipation performance of the coils and reduce the using amount of coil wires. By adopting the coils, not only is comprehensive cost of a transformer product reduced, but also the coil temperature rise is reduced simultaneously, and product running performance is improved.
Description
Technical field
The utility model belongs to the transformer technology field, relates to a kind of epoxy cast dry transformer.
Background technology
Epoxy cast dry transformer is the technology by casting epoxy resin, transformer coil is sealed the transformer that insulate with this with epoxy resin.Shown in Figure 1A, 1B, 1C, in existing epoxy cast dry transformer structure, the concentric suit of high-tension coil and low-voltage coil, and be provided with an insulating cylinder between high-tension coil and the low-voltage coil, and guarantee between high-tension coil and the low-voltage coil main insulating structure is arranged apart.
At present, high-tension coil for epoxy cast dry transformer, because it generally has the tap for non-excitation pressure adjustment, consider the needs of tap position and two ends lead-in wire, existing way is that a cavity is set in the front of coil casting mold, finish to carrying out coil when pouring into a mould Deng coil winding, cavity on the coil casting mold all can be filled by epoxy resin, after treating coil curing, form removal, a side that has tap at coil forms one by the epoxy resin filling and solidifies the boss that the back forms.As shown in Figure 3, described high-tension coil forms the encapsulated layer 11 that poured with epoxy resin formula coil comprises that conductor layer 1 is outer with being located at conductor layer.Shown in Fig. 2 A, 2B, 2C, described encapsulated layer integral body is cylindrical shape, and this cylindrical shape encapsulated layer is provided with boss 3 in the side that coil has tap.
This epoxy cast dry transformer that has boss has following shortcoming:
1. increased the manufacturing cost of transformer: form because boss is filled by epoxy resin fully, thereby can waste a large amount of epoxide resin materials in the manufacturing process, thereby increase the manufacturing cost of transformer production.Through measuring and calculating, for the coil with boss, the content of epoxy resin that forms this boss can account for the 35%-45% of the content of epoxy resin of whole winding.Be that the transformer of SCB10-2000/10 is example with existing model, after whole transformer teeming finished consume weight epoxy and be about 340kg, according to aforementioned proportion, the weight epoxy that lug boss position consumes has reached 120kg.So, 22 yuan/kg calculates with present epoxy resin unit price, then because the cost of this model single transformer that the existence of boss causes has increased by 2640 yuan.
2. reduced the heat dispersion of transformer: as shown in Figure 1, because the resin bed at boss position is thicker, hidden the heat dissipation region of the coil surface of this position correspondence fully, area of dissipation reduces, make the heat dispersion of coil surface at this position have a greatly reduced quality, therefore the efficiently radiates heat area of whole winding also reduces a lot, for the whole temperature rise with coil limits in allowed limits, have in practice by increasing conductor cross-section to reduce loss, add the coil air flue and increase the efficiently radiates heat area, with the achieve effective control temperature rise, still also increased the whole manufacturing cost of transformer on the other hand.
The utility model content
Technical problem to be solved in the utility model is at above shortcomings in the prior art, and a kind of epoxy cast dry transformer that can save epoxide resin material and can increase the efficiently radiates heat area of transformer coil is provided.
The technical scheme that solution the utility model technical problem adopts is that this epoxy cast dry transformer epoxy cast dry transformer comprises iron core, high-tension coil and low-voltage coil, described high-tension coil adopts poured with epoxy resin formula coil, described high-tension coil comprises conductor layer and is located at the outer encapsulated layer of conductor layer, wherein, described encapsulated layer is the columnar structured of no boss.
Preferably, described high-tension coil adopts paper tinsel around structure or wire-wound structure.
Wherein, described low-voltage coil adopts poured with epoxy resin formula coil or non-cast-type coil.
Preferably, described low-voltage coil adopts paper tinsel around structure or wire-wound structure.
Preferably, described iron core adopts the folded system of Pyatyi stepping technology to form by cold-reduced silicon sheet, has the advantage of low-loss, low noise.
Preferably, this transformer comprises that also described terminal block is located at the high-tension coil outside, is fixed on the described terminal block after the tap lead of described high-tension coil is drawn for the fixing terminal block of the tap lead of high-tension coil.
Further preferably, the top and bottom of described terminal block are separately fixed on the upper clamping piece and lower clamping piece of this transformer.
Preferably, described terminal block adopts epoxy resin bonded fiber.
In the high-tension coil of the utility model epoxy cast dry transformer, encapsulated layer has been removed the boss in traditional epoxy cast dry transformer, formed a kind of not with the encapsulated layer structure of boss, thereby the waste that has reduced epoxide resin material has to a certain extent reduced the manufacturing cost of product, has improved the operation temperature rise performance of product simultaneously.
The beneficial effects of the utility model are: not only can satisfy electric, the mechanical performance requirement of epoxy cast dry transformer coil, also cancelled the cast boss of band tap coil simultaneously, compare with the dry-type transformer of existing band boss, the high-tension coil of the utility model dry-type transformer not only can be saved the consumption of epoxy resin, can also increase the efficiently radiates heat area of transformer coil to a great extent, improve the heat dispersion of coil, reduce the consumption of winding wire.Therefore, the employing of this epoxy cast dry transformer has not only reduced the integrated cost of power transformer product, simultaneously, has reduced coil temperature rise, has improved the runnability of product.
Description of drawings
Figure 1A is the structural front view of existing epoxy cast dry transformer;
Figure 1B is the end view of Figure 1A;
Fig. 1 C is the vertical view of Figure 1A;
Fig. 2 A is the profile front view of the high-tension coil of existing epoxy cast dry transformer;
Fig. 2 B is the end view of Fig. 2 A;
Fig. 2 C is the vertical view of Fig. 2 A;
Fig. 3 is the cutaway view of the high-tension coil of existing epoxy cast dry transformer;
Fig. 4 A is the profile front view of the high-tension coil of epoxy cast dry transformer among the utility model embodiment 2;
Fig. 4 B is the end view of Fig. 4 A;
Fig. 4 C is the vertical view of Fig. 4 A;
Fig. 5 is the cutaway view of the high-tension coil of epoxy cast dry transformer among the utility model embodiment 2;
Fig. 6 A is the structural front view of epoxy cast dry transformer among the utility model embodiment 2;
Fig. 6 B is the end view of Fig. 6 A;
Fig. 6 C is the vertical view of Fig. 6 A.
Among the figure: the 1-conductor layer; 2-conductor layer insulation; The 3-boss; The 4-iron core; The 5-high-tension coil; The 6-low-voltage coil; The 7-tap lead; The 8-terminal block; The 9-upper clamping piece; The 10-lower clamping piece; The 11-encapsulated layer.
Embodiment
For making those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1:
Present embodiment provides a kind of epoxy cast dry transformer, comprise iron core, high-tension coil and low-voltage coil, described high-tension coil adopts poured with epoxy resin formula coil, described high-tension coil comprises conductor layer and is located at the outer encapsulated layer of conductor layer, wherein, described encapsulated layer is columnar structured with boss not.
Embodiment 2:
The epoxy cast dry transformer that provides in the present embodiment is a kind of three-phase three-column epoxy cast dry transformer.
Shown in Fig. 6 A, 6B, 6C, this transformer mainly comprises iron core 4, high-tension coil 5, low-voltage coil 6, upper clamping piece 9 and lower clamping piece 10.Wherein, described high-tension coil 5 adopts poured with epoxy resin formula coil, and high-tension coil 5 mainly is made of the epoxy resin of conductor, insulating material and cast.
As Fig. 4 A, 4B, 4C and shown in Figure 5, described high-tension coil 5 adopts segmented layered structure, high-tension coil 5 comprises conductor layer 1 and the encapsulated layer of being located at outside the conductor layer 1 11, wherein, described encapsulated layer 11 is columnar structured, and encapsulated layer 11 does not have boss in the side that coil has the tap coil.
Each interlayer at the conductor layer 1 of high-tension coil is provided with conductor layer insulation 2, and described conductor layer insulation 2 adopts grid cloth or insulating paper to come reinforced insulation, can in conductor layer 1 air flue be set according to the temperature rise needs simultaneously.
After coil winding is finished, place it in and carry out poured with epoxy resin in the coil casting mold.Wherein, the front of coil casting mold of cast usefulness does not arrange cavity, and the mould middle part has corresponding hole, is used for the drawing of tap lead of high-tension coil, wait to draw the back and adopt seal approach that described hole is sealed, in case epoxy resin is revealed in the principal vertical line circle casting process.Coil integral body through cast, after solidifying is by epoxy encapsulation, thereby forms a firm integral body, namely forms poured with epoxy resin formula coil, and this coil can satisfy performance demands such as the operating machinery of transformer, electric, heat.
In the present embodiment, described high-tension coil 5 can adopt paper tinsel around structure or wire-wound structure.
Wherein, described low-voltage coil 6 both can adopt poured with epoxy resin formula coil, also can adopt non-cast-type coil.
If described low-voltage coil 6 adopts paper tinsel around structure, the requirement that it can satisfy low-voltage coil low-voltage, big electric current has the advantage that technique for coiling is simple, anti-short circuit capability is strong, production cost is low simultaneously.Certainly, low-voltage coil 6 also can adopt the wire-wound structure, thereby can better meet the electrical insulation properties requirement of coil.
In the present embodiment, described iron core 4 adopts high magnetic conduction cold-rolled orientation silicon steel sheet closed assembly to form, and particularly, iron core 4 adopts the folded system of the complete tiltedly Pyatyi stepping lamination technology of 45 to form.
Wherein, transformer lead can be divided into two parts, a part is first and last end lead-in wire and the tap lead of coil, first and last end lead-in wire is used for winding protruding head is connected to respective terminal, wiring demand when satisfying the transformer operation, tap lead is used for load tap changer is connected to the relevant position of lead-in wire support plate, realizes the pressure regulation purpose by branch contact pin conversion in the transformer use; Another part is the connection lead-in wire between the high-tension coil three-phase two ends, is used for realizing the connection set of transformer.
Preferably, shown in Fig. 6 B, this transformer also comprises for the fixing terminal block 8 of the tap lead 7 of high-tension coil, described terminal block 8 is located at the outside of high-tension coil 5, and the two ends of terminal block 8 are separately fixed on the upper clamping piece 9 and lower clamping piece 10 of transformer, terminal block 8 is positioned at the dead ahead of every phase high-tension coil, is used for the fixedly tap lead 7 of high-tension coil, for binding post fix, go between fixing, divide the contact pin position that conversion provides support, fixes.After drawing, the tap lead 7 of described high-tension coil is fixed on the terminal block 8.
Wherein, the upper clamping piece 9 of described transformer and lower clamping piece 10 have the transformer core of making and form overall structure for being mainly used in the structural member of clamping iron core or join dependency, satisfy the effect of assembling coil, integrated support.Simultaneously, upper clamping piece 9 and lower clamping piece 10 also can provide as the support of annexes such as lead-in wire support plate etc. and fixing.
In the present embodiment, described terminal block 8 adopts epoxy resin bonded fiber.Certainly, terminal block 8 also can adopt other insulating material with certain mechanical strength, electrical insulation properties to make.
Be understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present utility model is described, yet the utility model is not limited thereto.For those skilled in the art, under the situation that does not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.
Claims (8)
1. epoxy cast dry transformer, comprise iron core, high-tension coil and low-voltage coil, described high-tension coil adopts poured with epoxy resin formula coil, and described high-tension coil comprises conductor layer and is located at the outer encapsulated layer of conductor layer, it is characterized in that described encapsulated layer is columnar structured for no boss.
2. epoxy cast dry transformer according to claim 1 is characterized in that, described high-tension coil adopts paper tinsel around structure or wire-wound structure.
3. epoxy cast dry transformer according to claim 1 is characterized in that, described low-voltage coil adopts poured with epoxy resin formula coil or non-cast-type coil.
4. epoxy cast dry transformer according to claim 3 is characterized in that, described low-voltage coil adopts paper tinsel around structure or wire-wound structure.
5. epoxy cast dry transformer according to claim 1 is characterized in that, described iron core adopts the folded system of Pyatyi stepping technology to form by cold-reduced silicon sheet.
6. according to the described epoxy cast dry transformer of one of claim 1-5, it is characterized in that this transformer also comprises terminal block, described terminal block is located at the high-tension coil outside, is fixed on the described terminal block after the tap lead of described high-tension coil is drawn.
7. epoxy cast dry transformer according to claim 6 is characterized in that, the top and bottom of described terminal block are separately fixed on the upper clamping piece and lower clamping piece of transformer.
8. epoxy cast dry transformer according to claim 6 is characterized in that, described terminal block adopts epoxy resin bonded fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170456 CN203232797U (en) | 2013-04-01 | 2013-04-01 | Epoxy pouring dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170456 CN203232797U (en) | 2013-04-01 | 2013-04-01 | Epoxy pouring dry type transformer |
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| Publication Number | Publication Date |
|---|---|
| CN203232797U true CN203232797U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320170456 Expired - Lifetime CN203232797U (en) | 2013-04-01 | 2013-04-01 | Epoxy pouring dry type transformer |
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| CN (1) | CN203232797U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485217A (en) * | 2014-12-31 | 2015-04-01 | 上海和鸣变压器有限公司 | Photovoltaic superconducting dry-type transformer |
| CN104485218A (en) * | 2014-12-31 | 2015-04-01 | 上海和鸣变压器有限公司 | Coil structure for double-split superconducting transformer |
| CN110379603A (en) * | 2019-08-06 | 2019-10-25 | 保定天威集团特变电气有限公司 | Folded appendiron core transformer and preparation method thereof |
| CN110993258A (en) * | 2019-12-02 | 2020-04-10 | 永济优耐特绝缘材料有限责任公司 | High-impedance single-phase boosting dry-type transformer and manufacturing method thereof |
| CN111009401A (en) * | 2019-11-29 | 2020-04-14 | 广州智光电气技术有限公司 | Dry type converter transformer and design method thereof |
-
2013
- 2013-04-01 CN CN 201320170456 patent/CN203232797U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485217A (en) * | 2014-12-31 | 2015-04-01 | 上海和鸣变压器有限公司 | Photovoltaic superconducting dry-type transformer |
| CN104485218A (en) * | 2014-12-31 | 2015-04-01 | 上海和鸣变压器有限公司 | Coil structure for double-split superconducting transformer |
| CN104485217B (en) * | 2014-12-31 | 2016-08-17 | 上海和鸣变压器有限公司 | Photovoltaic superconduction dry-type transformer |
| CN110379603A (en) * | 2019-08-06 | 2019-10-25 | 保定天威集团特变电气有限公司 | Folded appendiron core transformer and preparation method thereof |
| CN111009401A (en) * | 2019-11-29 | 2020-04-14 | 广州智光电气技术有限公司 | Dry type converter transformer and design method thereof |
| CN110993258A (en) * | 2019-12-02 | 2020-04-10 | 永济优耐特绝缘材料有限责任公司 | High-impedance single-phase boosting dry-type transformer and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131009 |