CN204680528U - A kind of dry-type transformer main airway insulation system of tape insulation cylinder - Google Patents
A kind of dry-type transformer main airway insulation system of tape insulation cylinder Download PDFInfo
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- CN204680528U CN204680528U CN201520256349.1U CN201520256349U CN204680528U CN 204680528 U CN204680528 U CN 204680528U CN 201520256349 U CN201520256349 U CN 201520256349U CN 204680528 U CN204680528 U CN 204680528U
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- dry
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- 125000003700 epoxy group Chemical group 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound 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Abstract
The utility model relates to a kind of dry-type transformer main airway insulation system of tape insulation cylinder, be made up of sheathed low-voltage coil and high-tension coil, low-voltage coil and high-tension coil are in arranging with one heart, between low-voltage coil and high-tension coil, air gap one circumferential direction is provided with an insulating cylinder, and the upper and lower side of this insulating cylinder is fixedly connected with low-voltage coil and high-tension coil through hold down gag.Compared with prior art, the utility model have structure simple, make easily, cost of manufacture is low, effectively can reduce the insulation distance between high-voltage coil and low-voltage coil, and advantages such as improving heat radiation efficiency.
Description
Technical field
The utility model relates to a kind of insulation system, especially relates to a kind of dry-type transformer main airway insulation system of tape insulation cylinder.
Background technology
The coiler part of dry-type transformer is made up of low-voltage coil and high-tension coil, and due to its difference of dielectric and mode that insulate, between low-voltage coil and high-tension coil, form a main airway, its effect is mainly dispelled the heat and insulate.Because the electric field strength of the pure air gap of main airway is lower, easily produce electric discharge phenomena, therefore for ensureing that insulation level will increase main airway insulation distance, thus make through increasing in high-tension coil, cost increases.In addition because air gap is excessive, during air circulation, well along coil surface circulation, coil radiating effect can not be affected.
Chinese patent CN102592791A discloses a kind of dry-type transformer of good heat dissipation effect, comprise iron core, the two pairs of folders up and down clamped by iron core and the coil be wound on iron core, iron core is formed by stacking by some silicon steel sheets, some epoxy fabric swatch are provided with between adjacent two silicon steel sheets of described superposition in the middle part of iron core, a heat dissipation channel being communicated with core interior and communicating with iron core outside is formed between adjacent epoxy fabric swatch with this adjacent silicon steel disc, this radiator structure mainly solves silicon steel plate core temperature rise problems of too, cannot solve the problem.
Utility model content
The purpose of this utility model be exactly provide to overcome defect that above-mentioned prior art exists a kind of structure simple, make easily, cost of manufacture is low, effectively can reduce the insulation distance between high-voltage coil and low-voltage coil, and the dry-type transformer main airway insulation system of the tape insulation cylinder of improving heat radiation efficiency.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of dry-type transformer main airway insulation system of tape insulation cylinder, be made up of sheathed low-voltage coil and high-tension coil, low-voltage coil and high-tension coil are in arranging with one heart, between low-voltage coil and high-tension coil, air gap one circumferential direction is provided with an insulating cylinder, and the upper and lower side of this insulating cylinder is fixedly connected with low-voltage coil and high-tension coil through hold down gag.
The upper and lower side of described insulating cylinder exceeds the upper and lower side of low-voltage coil and high-tension coil, and the distance exceeded up and down is identical.
Described insulating cylinder exceeds low-voltage coil and high-tension coil 15-20mm.
The thickness of described insulating cylinder is 0.9 ~ 2.2mm.
Described insulating cylinder is that composite polyester film or NMN composite flexible material obtain according to coil size and shape coiling.
Described low-voltage coil adopts the coiling of multilayer laminar structure composite to form by Copper Foil and insulating material.
Described high-tension coil is adopted multisection type coiling by copper conductor and insulating material and is formed through vacuum epoxy casting.
Compared with prior art, the utility model has the following advantages:
(1) dry-type transformer main airway pure air gap thunder and lightning all-wave impact tolerance electric field strength is: naked cylinder 1.9kV/mm, there is insulating cylinder 2.15kV/mm, therefore by placing insulating cylinder between high-voltage coil and low-voltage coil, significantly can reduce insulation distance, reducing transformer whole cost;
(2) when transformer runs, coil heating is comparatively large, and main airway is as important heat dissipation channel, and tape insulation cylinder main airway structure can allow air-flow fully along coil surface flowing by the isolation of insulating cylinder, and take away heat, radiating efficiency is higher;
(3) this structure can also effectively prevent metal or other conductive bodies from falling into main airway and producing to high-voltage coil and low-voltage coil electric discharge of putting up a bridge, thus ensure that the safe operation of transformer.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present utility model;
Fig. 2 is plan structure schematic diagram of the present utility model.
In figure, 1-low-voltage coil; 2-insulating cylinder; 3-high-tension coil; 4-hold down gag.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment 1
A dry-type transformer main airway insulation system for tape insulation cylinder, its structure as shown in Figure 1-2, comprises the low-voltage coil 1 of dry-type transformer, insulating cylinder 2, high-tension coil 3 and hold down gag 4.Low-voltage coil 1 and high-tension coil 2 are in arranging with one heart, between low-voltage coil 1 and high-tension coil 3, air gap one circumferential direction is provided with an insulating cylinder 2, the upper and lower side of insulating cylinder 2 exceeds the upper and lower side of low-voltage coil and high-tension coil, the distance exceeded up and down is identical, be 15 ~ 20mm, the distance exceeded in the present embodiment is 15mm, is fixedly connected with low-voltage coil 1 and high-tension coil 3 through hold down gag 4.In addition, the thickness of insulating cylinder 2 is 0.9 ~ 2.2mm, for composite polyester film or NMN composite flexible material obtain according to coil size and shape coiling, is composite polyester film in the present embodiment, thickness 0.9mm.Low-voltage coil 1 adopts the coiling of multilayer laminar structure composite to form by Copper Foil and insulating material.High-tension coil 3 is adopted multisection type coiling by copper conductor and insulating material and is formed through vacuum epoxy casting.
Embodiment 2
For 10kV electric pressure dry-type amorphous alloy transformer, 10kV electric pressure national standard is 75kV to the requirement of full lightning impulse withstand voltage, electric field strength according to above-mentioned pure air gap calculates, naked barrel structure high-voltage coil and low-voltage coil insulation distance should be, and in the present embodiment, the high-voltage coil and low-voltage coil insulation distance of dry-type transformer main airway insulation system can be reduced into 35mm, high-tension coil determines based on low-voltage coil and insulation distance, so when insulation distance reduces 5mm, can significantly save high-tension coil material, reduce costs.
Main airway is divided into two by the insulating cylinder in the present embodiment, and form two air flues that independently circulate, this structure makes airflow more tight, fully takes away the heat on low-voltage coil 1 and high-tension coil 3 surface, improves radiating efficiency.
Claims (7)
1. the dry-type transformer main airway insulation system of a tape insulation cylinder, it is characterized in that, this insulation system is made up of sheathed low-voltage coil and high-tension coil, between low-voltage coil and high-tension coil, air gap one circumferential direction is provided with an insulating cylinder, and the upper and lower side of this insulating cylinder is fixedly connected with low-voltage coil and high-tension coil through hold down gag.
2. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 1, is characterized in that, the upper and lower side of described insulating cylinder exceeds the upper and lower side of low-voltage coil and high-tension coil, and the distance exceeded up and down is identical.
3. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 2, is characterized in that, described insulating cylinder exceeds low-voltage coil and high-tension coil 15 ~ 20mm.
4. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 1, is characterized in that, the thickness of described insulating cylinder is 0.9 ~ 2.2mm.
5. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 1, is characterized in that, described insulating cylinder is that composite polyester film or NMN composite flexible material obtain according to coil size and shape coiling.
6. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 1, is characterized in that, described low-voltage coil adopts the coiling of multilayer laminar structure composite to form by Copper Foil and insulating material.
7. the dry-type transformer main airway insulation system of a kind of tape insulation cylinder according to claim 1, is characterized in that, described high-tension coil is adopted multisection type coiling by copper conductor and insulating material and formed through vacuum epoxy casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520256349.1U CN204680528U (en) | 2015-04-24 | 2015-04-24 | A kind of dry-type transformer main airway insulation system of tape insulation cylinder |
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| CN201520256349.1U CN204680528U (en) | 2015-04-24 | 2015-04-24 | A kind of dry-type transformer main airway insulation system of tape insulation cylinder |
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| CN204680528U true CN204680528U (en) | 2015-09-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761911A (en) * | 2016-04-18 | 2016-07-13 | 江西特种变压器厂 | Epoxy pouring transformer of compound main air channel insulation structure and manufacturing method thereof |
| CN106158300A (en) * | 2015-04-24 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of dry-type transformer main airway insulation system of tape insulation cylinder |
-
2015
- 2015-04-24 CN CN201520256349.1U patent/CN204680528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158300A (en) * | 2015-04-24 | 2016-11-23 | 上海飞晶电气股份有限公司 | A kind of dry-type transformer main airway insulation system of tape insulation cylinder |
| CN105761911A (en) * | 2016-04-18 | 2016-07-13 | 江西特种变压器厂 | Epoxy pouring transformer of compound main air channel insulation structure and manufacturing method thereof |
| CN105761911B (en) * | 2016-04-18 | 2018-09-14 | 江西特种变压器厂 | A kind of epoxy cast transformer and its manufacturing method of compound main airway insulation system |
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Granted publication date: 20150930 Termination date: 20210424 |