CN104240804A - Heat-resistant self-sticking transposed conductor for transformers and manufacturing method thereof - Google Patents
Heat-resistant self-sticking transposed conductor for transformers and manufacturing method thereof Download PDFInfo
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- CN104240804A CN104240804A CN201410523497.5A CN201410523497A CN104240804A CN 104240804 A CN104240804 A CN 104240804A CN 201410523497 A CN201410523497 A CN 201410523497A CN 104240804 A CN104240804 A CN 104240804A
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Abstract
The invention discloses a heat-resistant self-sticking transposed wire for transformers and a manufacturing method thereof. Two rows of heat-resistant self-sticking enameled flat wires, having mutually contacted wide faces, are arranged within an outer insulating layer. Middle lining paper is arranged between the two rows of heat-resistant self-sticking enameled flat wires in such a manner that the middle lining paper is transposed in a same direction above and below the two rows of heat-resistant self-sticking enameled flat wires along their narrow faces. Each heat-resistant self-sticking enameled flat wire comprises a rectangular conductor, the cross section of the rectangular conductor is rounded, the outside of the rectangular conductor is coated with a primer film, and the outside of the primer film is coated with a finish film. From view of the cross section of the heat-resistant self-sticking enameled flat wires, the wide side of each primer film is concavely arced, and the outline of each finish film is a rectangle rounded. The heat-resistant self-sticking transposed wire has the advantages that mechanical strength of the transformer windings under high temperature can be effectively improved, short circuit resistance of the transformer windings is improved, and the service lives of the transformer windings are prolonged.
Description
Technical field
The invention discloses a kind of transformer heat resistance self-adhesive transposed conductor, the invention also discloses a kind of preparation method of transformer heat resistance self-adhesive transposed conductor, specifically for the heat resistance self-adhesive transposed conductor of transformer.
Background technology
At present, along with the continuous increase of transformer capacity and improve constantly the requirement of the stability of a system, the anti-short circuit capability of transformer equipment is had higher requirement, adopt self-adhering transposed conductor effectively can meet this performance requirement of transformer.So-called self-adhering transposed conductor, namely be coat suitable tack coat on single enameled sheet wire surface, when coil is after Constant pressure drying, can firmly be bonded together between each self-adhesion enameled sheet wire, form a rigid body entirety, thus the mechanical performance such as anti-bending strength, tensile strength of intensifier coil greatly, and then the anti-short circuit capability of intensifier coil.
At normal temperatures, the mechanical strength of common self-adhering transposed conductor can reach more than 4 times of non-self-adhering transposed conductor, but when common self-adhering transposed conductor is 100 DEG C of long-term works, its adhesion strength starts to occur downward trend, when 120 DEG C of long-term works, its adhesion strength is almost suitable with non-self-adhering transposed conductor.In certain circumstances, the working temperature of Winding in Power Transformer may be in more than 100 DEG C for a long time, even local reaches 120 DEG C, at this moment, because the adhesion strength of common self-adhering transposed conductor weakens, its mechanical strength is reduced, and under the effect of short-circuit impact, Transformer Winding may produce the mechanical damages such as torsional deformation, affects fail safe and the useful life of transformer operation.
Summary of the invention
An object of the present invention overcomes the deficiencies in the prior art, provides a kind of and have higher anti-vibration and anti-short circuit capability, greatly improves flexural rigidity and improve the transformer heat resistance self-adhesive transposed conductor of mechanical strength.
Another object of the present invention is to provide a kind of preparation method of transformer heat resistance self-adhesive transposed conductor.
According to technical scheme provided by the invention, described transformer heat resistance self-adhesive transposed conductor, the heat resistance self-adhesive enameled sheet wire that two col width faces contact with each other is provided with in external insulation layer, on two row heat resistance self-adhesive enameled sheet wires and below do the same transposition turned to along leptoprosopy, between two row heat resistance self-adhesive enameled sheet wires, be provided with middle liner paper; Described heat resistance self-adhesive enameled sheet wire comprises the rectangle conductor that cross section is band fillet, is externally coated with primer film at conductor, is externally coated with top-coat paint film at primer film; On the cross section of enameled sheet wire, the broadside of primer film is circular arc indent, and the outline of top-coat paint film is the rectangle of band fillet.
On the cross section of enameled sheet wire, when conductor width is less than or equal to 5mm, the indent amount of primer film is 0.005mm.
On the cross section of enameled sheet wire, when conductor width is greater than 5.00mm and is less than or equal to 10.00mm, the indent amount of primer film is 0.010mm.
On the cross section of enameled sheet wire, when conductor width is greater than 10.00mm and is less than or equal to 15.00mm, the indent amount of primer film is 0.015mm.
The thickness of described primer film is 0.08mm ~ 0.12mm, and the material of primer film is acetal paint.
The thickness of described top-coat paint film is 0.03mm ~ 0.05mm, and the material of top-coat paint film is heat resistance self-adhesive paint.
A kind of preparation method of transformer heat resistance self-adhesive transposed conductor comprises the following steps:
A, to get the cross section produced be rectangle conductor with fillet, utilize the surface-coated priming paint of fixing japanning die at conductor of spill, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 120 DEG C ~ 220 DEG C, lower floor's temperature controls at 220 DEG C ~ 310 DEG C, middle level temperature controls at 300 DEG C ~ 420 DEG C, upper strata temperature controls at 380 DEG C ~ 450 DEG C, the speed of service controls at 10m/min ~ 13m/min, solidifying priming paint forms primer film, obtains heat resistance self-adhesive enameled sheet wire semi-finished product;
B, Half japanning die is utilized evenly to apply finish paint in heat resistance self-adhesive enameled sheet wire surface of semi-finished, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 160 DEG C ~ 180 DEG C, lower floor's temperature controls at 300 DEG C ~ 340 DEG C, middle level temperature controls at 350 DEG C ~ 390 DEG C, and upper strata temperature controls at 400 DEG C ~ 450 DEG C, and the speed of service controls at 7m/min ~ 13m/min, topcoating cures forming surface paint film, obtains heat resistance self-adhesive enameled sheet wire;
C, heat resistance self-adhesive enameled sheet wire at its outside coated external insulation layer, and to be coiled around formation heat resistance self-adhesive transposed conductor after transposition bunchy on pulling equipment.
Adopt the heat resistance self-adhesive enameled sheet wire that preparation method of the present invention makes, all show high single line adhesion strength when room temperature (25 DEG C) and high temperature, its single line adhesion strength when room temperature more than 12N/mm
2, more than 6N/mm 120 DEG C time
2.Compared with common self-adhesion enameled sheet wire, the single line adhesion strength of heat resistance self-adhesive enameled sheet wire 120 DEG C time improves more than 8 times.Adopt the heat resistance self-adhesive transposed conductor that above-mentioned production technology is made, also show very high integrally bending rigidity when room temperature and high temperature.After flexural rigidity test, the solidification coefficient of heat resistance self-adhesive transposed conductor when room temperature can reach more than 12, and the solidification coefficient 105 DEG C time can reach more than 6, and the solidification coefficient 120 DEG C time can reach more than 3.Heat resistance self-adhesive transposed conductor provided by the invention effectively can improve Transformer Winding mechanical strength at high temperature, improves its anti-short circuit capability, extends its useful life.
Accompanying drawing explanation
Fig. 1 is cross sectional representation of the present invention.
Fig. 2 is the cross sectional representation of the single heat resistance self-adhesive enameled sheet wire in the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
This transformer heat resistance self-adhesive transposed conductor, the heat resistance self-adhesive heat resistance self-adhesive enameled sheet wire 2 that the two col width faces that are provided with in external insulation layer 1 contact with each other, on two row heat resistance self-adhesive heat resistance self-adhesive enameled sheet wires and below do the same transposition turned to along leptoprosopy, between two row heat resistance self-adhesive heat resistance self-adhesive enameled sheet wires, be provided with middle liner paper 3.Described heat resistance self-adhesive heat resistance self-adhesive enameled sheet wire 2 comprises the rectangle conductor 2.1 that cross section is band fillet, is externally coated with primer film 2.2 at conductor 2.1, is externally coated with top-coat paint film 2.3 at primer film 2.2; On the cross section of heat resistance self-adhesive enameled sheet wire 2, the broadside of primer film 2.2 is circular arc indent, and the outline of top-coat paint film 2.3 is the rectangle of band fillet.
On the cross section of heat resistance self-adhesive enameled sheet wire 2, when conductor 2.1 width is less than or equal to 5mm, the indent amount of primer film 2.2 is 0.005mm.
On the cross section of heat resistance self-adhesive enameled sheet wire 2, when conductor 2.1 width is greater than 5.00mm and is less than or equal to 10.00mm, the indent amount of primer film 2.2 is 0.010mm.
On the cross section of heat resistance self-adhesive enameled sheet wire 2, when conductor 2.1 width is greater than 10.00mm and is less than or equal to 15.00mm, the indent amount of primer film 2.2 is 0.015mm.
The thickness of described primer film 2.2 is 0.08mm ~ 0.12mm, and the material of primer film 2.2 is acetal paint.
The thickness of described top-coat paint film 2.3 is 0.03mm ~ 0.05mm, and the material of top-coat paint film 2.3 is heat resistance self-adhesive paint.
Embodiment 1
The preparation method of a kind of transformer heat resistance self-adhesive of the present invention transposed conductor comprises the following steps:
A, getting the cross section produced is rectangle conductor specification 1.40mm × 6.07mm with fillet, utilize the surface-coated priming paint of fixing japanning die at conductor of spill, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 130 DEG C ~ 135 DEG C, lower floor's temperature controls at 235 DEG C ~ 240 DEG C, middle level temperature controls at 350 DEG C ~ 370 DEG C, upper strata temperature controls at 390 DEG C ~ 400 DEG C, the speed of service controls at 10m/min, it is 0.09mm primer film that solidifying priming paint forms thickness, the indent amount of primer film is 0.010mm, obtain heat resistance self-adhesive enameled sheet wire semi-finished product,
B, Half japanning die is utilized evenly to apply finish paint in heat resistance self-adhesive enameled sheet wire surface of semi-finished, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 165 DEG C ~ 170 DEG C, lower floor's temperature controls at 310 DEG C ~ 320 DEG C, middle level temperature controls at 355 DEG C ~ 365 DEG C, and upper strata temperature controls at 410 DEG C ~ 420 DEG C, and the speed of service controls at 10m/min, it is the top-coat paint film of 0.04mm that topcoating cures forms thickness, obtains heat resistance self-adhesive enameled sheet wire;
C, 25 heat resistance self-adhesive enameled sheet wire specification 1.40mm × 6.07mm, at its outside coated external insulation layer after transposition bunchy, and coil around formation heat resistance self-adhesive transposed conductor on pulling equipment.
The single line adhesion strength of the heat resistance self-adhesive heat resistance self-adhesive enameled sheet wire that embodiment 1 obtains is in table 1.
The integrally bending rigidity of the heat resistance self-adhesive transposed conductor that embodiment 1 obtains is in table 2.
Table 1
Table 2
Embodiment 2
The preparation method of a kind of transformer heat resistance self-adhesive of the present invention transposed conductor comprises the following steps:
A, getting the cross section produced is rectangle conductor specification 1.22mm × 5.04mm with fillet, utilize the surface-coated priming paint of fixing japanning die at conductor of spill, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 120 DEG C ~ 125 DEG C, lower floor's temperature controls at 220 DEG C ~ 230 DEG C, middle level temperature controls at 300 DEG C ~ 310 DEG C, upper strata temperature controls at 380 DEG C ~ 390 DEG C, the speed of service controls at 10.5m/min, it is the primer film of 0.08mm that solidifying priming paint forms thickness, the indent amount of primer film is 0.010mm, obtain heat resistance self-adhesive enameled sheet wire semi-finished product,
B, Half japanning die is utilized evenly to apply finish paint in heat resistance self-adhesive enameled sheet wire surface of semi-finished, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 160 DEG C ~ 165 DEG C, lower floor's temperature controls at 300 DEG C ~ 310 DEG C, middle level temperature controls at 350 DEG C ~ 360 DEG C, and upper strata temperature controls at 400 DEG C ~ 410 DEG C, and the speed of service controls at 10.8m/min, it is the top-coat paint film of 0.03mm that topcoating cures forms thickness, obtains heat resistance self-adhesive enameled sheet wire;
C, 27 heat resistance self-adhesive enameled sheet wire specification 1.22mm × 5.04mm, at its outside coated external insulation layer after transposition bunchy, and coil around formation heat resistance self-adhesive transposed conductor on pulling equipment.
The single line adhesion strength of the heat resistance self-adhesive heat resistance self-adhesive enameled sheet wire that embodiment 2 obtains is in table 3.
The integrally bending rigidity of the heat resistance self-adhesive transposed conductor that embodiment 2 obtains is in table 4.
Table 3
Table 4
Embodiment 3
The preparation method of a kind of transformer heat resistance self-adhesive of the present invention transposed conductor comprises the following steps:
A, getting the cross section produced is rectangle conductor specification 2.67mm × 12.02mm with fillet, utilize the surface-coated priming paint of fixing japanning die at conductor of spill, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 215 DEG C ~ 220 DEG C, lower floor's temperature controls at 305 DEG C ~ 310 DEG C, middle level temperature controls at 410 DEG C ~ 420 DEG C, upper strata temperature controls at 440 DEG C ~ 450 DEG C, the speed of service controls at 13m/min, it is 0.012mm primer film that solidifying priming paint forms thickness, the indent amount of primer film is 0.015mm, obtain heat resistance self-adhesive enameled sheet wire semi-finished product,
B, Half japanning die is utilized evenly to apply finish paint in heat resistance self-adhesive enameled sheet wire surface of semi-finished, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 170 DEG C ~ 180 DEG C, lower floor's temperature controls at 330 DEG C ~ 340 DEG C, middle level temperature controls at 380 DEG C ~ 390 DEG C, and upper strata temperature controls at 440 DEG C ~ 450 DEG C, and the speed of service controls at 13m/min, it is the top-coat paint film of 0.05mm that topcoating cures forms thickness, obtains heat resistance self-adhesive enameled sheet wire;
C, 23 heat resistance self-adhesive enameled sheet wire specification 2.67mm × 12.02mm, at its outside coated external insulation layer after transposition bunchy, and coil around formation heat resistance self-adhesive transposed conductor on pulling equipment.
The single line adhesion strength of the heat resistance self-adhesive heat resistance self-adhesive enameled sheet wire that embodiment 3 obtains is in table 5.
The integrally bending rigidity of the heat resistance self-adhesive transposed conductor that embodiment 3 obtains is in table 6.
Table 5
Table 6
Adopt following operating procedure to carry out adhesion strength test to heat resistance self-adhesive enameled sheet wire single line: wide the overlap joint by two length being the heat resistance self-adhesive enameled sheet wire of 110mm, the lap of splice is 25mm, and sample bond regions length applying pressure is 1N/mm
2, put into by pressurized sample after 120 DEG C of baking ovens solidify 24h, tensile testing machine carries out sample the breaking test of different temperatures, and draw speed is 10mm/min.The pull-off force calculated under different temperatures is single line adhesion strength with the ratio of overlap joint area.
As can be seen from table 1, table 3 and table 5, along with the rising of temperature, the adhesion strength of common heat resistance self-adhesive enameled sheet wire sharply declines, the adhesion strength of heat resistance self-adhesive enameled sheet wire then changes not quite, when 120 DEG C of high temperature, the single line adhesion strength of heat resistance self-adhesive enameled sheet wire is more than 8 times of common self-adhesion enameled sheet wire.Because the single line adhesion strength of heat resistance self-adhesive enameled sheet wire of the present invention is greatly enhanced, so the adhesion strength of the heat resistance self-adhesive transposed conductor be made up of the single line of many heat resistance self-adhesive enameled sheet wires also can be greatly enhanced.
Adopt the integrally bending rigidity of following operating procedure to heat resistance self-adhesive transposed conductor to test: the specimen length of heat resistance self-adhesive transposed conductor is about 200mm, it is 1N/mm that transposed conductor radial height direction applies pressure
2, pressurized sample is cured process, and curing temperature is 115 ~ 125 DEG C, and curing time is 48h, and sample cools laggard line bend implosion test, pressure head radius 5mm used, supports span 100mm, test speed 10mm/min, minimum amount of deflection 5mm.Bend test condition is respectively: 1) 25 DEG C time detect; 2) 105 DEG C time insulation 60min after detect; 3) 120 DEG C time insulation 60min after detect.
As can be seen from table 2, table 4 and table 6, along with the rising of temperature, the rigidity of common self-adhering transposed conductor sharply declines, the rigidity of heat resistance self-adhesive transposed conductor then changes not quite, 105 DEG C, 120 DEG C of high temperature time, the rigidity of heat resistance self-adhesive transposed conductor is more than 3 times of common heat resistance self-adhesive transposed conductor, effectively improves Transformer Winding mechanical strength at high temperature, improve its anti-short circuit capability, extend its useful life.
Claims (7)
1. a transformer heat resistance self-adhesive transposed conductor, it is characterized in that: the heat resistance self-adhesive enameled sheet wire (2) that the two col width faces that are provided with in external insulation layer (1) contact with each other, on two row heat resistance self-adhesive enameled sheet wires and below do the same transposition turned to along leptoprosopy, between two row heat resistance self-adhesive enameled sheet wires, be provided with middle liner paper (3); Described heat resistance self-adhesive enameled sheet wire (2) comprises the rectangle conductor (2.1) that cross section is band fillet, is externally coated with primer film (2.2) at conductor (2.1), is externally coated with top-coat paint film (2.3) at primer film (2.2); On the cross section of enameled sheet wire (2), the broadside of primer film (2.2) is circular arc indent, and the outline of top-coat paint film (2.3) is the rectangle of band fillet.
2. transformer heat resistance self-adhesive transposed conductor as claimed in claim 1, it is characterized in that: on the cross section of enameled sheet wire (2), when conductor (2.1) width is less than or equal to 5 mm, the indent amount of primer film (2.2) is 0.005 mm.
3. transformer heat resistance self-adhesive transposed conductor as claimed in claim 1, it is characterized in that: on the cross section of enameled sheet wire (2), when conductor (2.1) width is greater than 5.00 mm and is less than or equal to 10.00 mm, the indent amount of primer film (2.2) is 0.010 mm.
4. transformer heat resistance self-adhesive transposed conductor as claimed in claim 1, it is characterized in that: on the cross section of enameled sheet wire (2), when conductor (2.1) width is greater than 10.00 mm and is less than or equal to 15.00 mm, the indent amount of primer film (2.2) is 0.015 mm.
5. transformer heat resistance self-adhesive transposed conductor as claimed in claim 1, is characterized in that: the thickness of described primer film (2.2) is 0.08 mm ~ 0.12 mm, and the material of primer film (2.2) is acetal paint.
6. transformer heat resistance self-adhesive transposed conductor as claimed in claim 1, is characterized in that: the thickness of described top-coat paint film (2.3) is 0.03 mm ~ 0.05 mm, and the material of top-coat paint film (2.3) is heat resistance self-adhesive paint.
7. the transformer preparation method of heat resistance self-adhesive transposed conductor described in claim 1 ~ 6 any one, is characterized in that the method comprises the following steps:
A, to get the cross section produced be rectangle conductor (2.1) with fillet, utilize the fixing japanning die of spill at the surface-coated priming paint of conductor (2.1), enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 120 DEG C ~ 220 DEG C, lower floor's temperature controls at 220 DEG C ~ 310 DEG C, middle level temperature controls at 300 DEG C ~ 420 DEG C, upper strata temperature controls at 380 DEG C ~ 450 DEG C, the speed of service controls at 10m/min ~ 13m/min, solidifying priming paint forms primer film (2.2), obtains heat resistance self-adhesive enameled sheet wire semi-finished product;
B, Half japanning die is utilized evenly to apply finish paint in heat resistance self-adhesive enameled sheet wire surface of semi-finished, enter vertical enamel-cover roasting oven and carry out baking-curing, the inlet temperature of vertical enamel-cover roasting oven controls at 160 DEG C ~ 180 DEG C, lower floor's temperature controls at 300 DEG C ~ 340 DEG C, middle level temperature controls at 350 DEG C ~ 390 DEG C, upper strata temperature controls at 400 DEG C ~ 450 DEG C, the speed of service controls at 7 m/min ~ 13m/min, topcoating cures forming surface paint film (2.3), obtains heat resistance self-adhesive enameled sheet wire (2);
C, heat resistance self-adhesive enameled sheet wire (2) its outside coated external insulation layer (1), and to be coiled around formation heat resistance self-adhesive transposed conductor after transposition bunchy on pulling equipment.
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| CN106531298A (en) * | 2017-01-16 | 2017-03-22 | 无锡统力电工股份有限公司 | Transposed conductor processed from thin film enameled rectangular wires and fabrication method of transposed conductor |
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| CN107123546A (en) * | 2017-06-23 | 2017-09-01 | 中达电子(江苏)有限公司 | The preparation method of coiling, winding and coiling |
| CN108831596A (en) * | 2018-07-26 | 2018-11-16 | 江苏中容电气有限公司 | A kind of EHV transformer high heat resistance insulation transposed conductor |
| CN110310782A (en) * | 2019-07-12 | 2019-10-08 | 浙江郎立电工器材有限公司 | A kind of processing technology and device of household motor dedicated self-adhesive enameled wire |
| CN110364305A (en) * | 2019-07-29 | 2019-10-22 | 湖州师范学院 | Double rollers enameled sheet wire conductor forming device |
| CN114628078A (en) * | 2021-12-31 | 2022-06-14 | 露笑科技股份有限公司 | Preparation method of electromagnetic wire with excellent anti-stripping performance |
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| CN106531292A (en) * | 2016-12-06 | 2017-03-22 | 保定天威线材制造有限公司 | High temperature high bonding strength transposed lead and manufacturing process thereof |
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| CN108831596A (en) * | 2018-07-26 | 2018-11-16 | 江苏中容电气有限公司 | A kind of EHV transformer high heat resistance insulation transposed conductor |
| CN108831596B (en) * | 2018-07-26 | 2024-01-19 | 江苏中容电气有限公司 | High heat-resistant insulation transposed conductor for ultrahigh voltage transformer |
| CN110310782A (en) * | 2019-07-12 | 2019-10-08 | 浙江郎立电工器材有限公司 | A kind of processing technology and device of household motor dedicated self-adhesive enameled wire |
| CN110364305A (en) * | 2019-07-29 | 2019-10-22 | 湖州师范学院 | Double rollers enameled sheet wire conductor forming device |
| CN110364305B (en) * | 2019-07-29 | 2024-03-29 | 湖州师范学院 | Double-roller enamelled flat wire conductor forming device |
| CN114628078A (en) * | 2021-12-31 | 2022-06-14 | 露笑科技股份有限公司 | Preparation method of electromagnetic wire with excellent anti-stripping performance |
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