CN101013615A - Rectangular cross section stranded conductor and fabrication method and apparatus thereof - Google Patents
Rectangular cross section stranded conductor and fabrication method and apparatus thereof Download PDFInfo
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- CN101013615A CN101013615A CN 200610022603 CN200610022603A CN101013615A CN 101013615 A CN101013615 A CN 101013615A CN 200610022603 CN200610022603 CN 200610022603 CN 200610022603 A CN200610022603 A CN 200610022603A CN 101013615 A CN101013615 A CN 101013615A
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Abstract
The invention relates to one motor, transducer, electrical reactor section hinge coil set, which is characterized by the following: the rectangle section hinged wire core is in array type or beehive distribution; the process method comprises the following steps: distributing the shape device onto hinge points through relative position due to pressure wheel wire to make it in regular distribution; the regular wire section outline is of rectangle shape; the coil set is of medlin and NOMEX insulation layer to product alternating 1000kv and direct current 800kv reactor.
Description
Technical field
The present invention relates to a kind of motor, transformer, reactance rectangular winding wire, relate in particular to a kind of by the stranded square-section winding wire that forms of stranded conductor and processing method and device.
Background technology
Jumbo motor, transformer, the sectional area of the winding conducting wire of reactor is very big, for making the compact conformation of winding wire, usually adopt square-section lead coiling, traditional square-section lead directly uses copper bar, real core conductors such as aluminium row, this conductor rigidity is big, the technique for coiling difficulty is big, limited by technique for coiling, the sectional area of real core conductor is limited, make motor, transformer, the capacity of reactor or electric pressure are also limited, for example, can only produce the reactor of 500kV at present, can't producing more, voltage levels (exchanges 1000kV, direct current ± 800kV and more than) reactor.This situation for a change, some cable manufacturing enterprises are are researching and developing a kind of square-section stranded conductor, and processing method is that stranded conductor is pressed shaped device by one, and the cross sectional shape of stranded conductor is drawn into rectangle.Chinese patent disclosed " rectangular aluminium cable wire " (application number 93107996.9) for example, its pliability is better than real core conductor, can reduce the technique for coiling difficulty, like this, just can use more heavy in section lead to produce more large-size machine, transformer or the reactor of voltage levels more.But this product is not trial-produceed successfully as yet, also has many defectives, mainly contains:
1, core moulding irregularity in the lead, malalignment is random, and the gap is inhomogeneous, is easy to generate the electrion phenomenon.
2, the contour shape of cross-sectional area of conductor is approximate rectangular, top layer lead out-of-flatness, the outer layer conductor on same limit, its center is not also on same straight line, the arc radius size at four angles is inhomogeneous, brings difficulty for the insulating barrier around-packing technology of postorder, and insulation property are had a negative impact.
3, each lead distortion is inconsistent in the conductor, is out of shape big conductor, and its top layer diaphragm is destroyed, and harmonic impedance is increased, and has reduced electrical property.
Trace it to its cause and mainly be:
1, the design of the prototype structure of stranded conductor is unreasonable, can not be pressed into the needed core arrangement architecture of target product.
2, processing technology is improper.Existing technology is two one-step forming technologies, earlier lead is twisted into the circular section, twisted wire with the circular section is drawn into the square-section with shaped device again, the change of cross section profile shape is subjected to drawing to press distortion by core and dwindles the realization of core gap, its negative consequence is: each core deformation extent is inconsistent, and core distortion in top layer is big, and the distortion of central core core is little, make the regularly arranged core of script become irregular alignment, and the gap become inhomogeneous.
3, it is unreasonable to press the structural design of mould, adopts conventional drawing-die, and the cross section profile of lead is forced to be drawn into rectangle by mould.The shortcoming of this mould is: 1., maintain static during mold work, during guidewire movement, with mould strong sliding friction takes place, the top layer lead scratches serious, and burr is many, and oxide protective layer is destroyed; 2., because force of sliding friction is very big, and mould weares and teares easily, useful life is short, and equipment energy consumption increases; 3., the fixed size of mould is non-adjustable, can only process a kind of lead of specification, the lead of different size needs corresponding different moulds, so the specification of mould is many, the cost height; 4., during die change, must be again take the lead traction, operate loaded down with trivial detailsly, time-consuming, labor strength is big, and production efficiency is low to conductor.
Summary of the invention
Primary and foremost purpose of the present invention provides a kind of heavy in section, square-section twisted wire and processing method and device that pliability is good.
Another object of the present invention provides a kind of heavy in section, pliability is good, dielectric strength is high, can produce the rectangle winding wire that exchanges 1000kV, direct current ± 800kV superhigh pressure reactance device with it.
The technical solution that realizes above-mentioned purpose is:
A kind of square-section stranded conductor forms by the multiply core is stranded, and the core of described lead is regularly arranged.
The queueing discipline of described core is matrix form or honeycomb fashion.
Described core is arranged as hierarchy, and the core number of each layer is increased progressively to skin by central core, and satisfies following formula:
M＝n+(n+8)+(n+8+8)+…
In the formula: M is a lead core sum
N is a central core core number, n=1.2.3
A kind of rectangle winding wire that exchanges 1000kV, direct current ± 800kV reactor that is used as, comprise conductor and be coated on the insulating barrier of conductive surface, described conductor adopts above-mentioned square-section stranded conductor, described insulating barrier is the composite insulation layer that multiple layers of different materials constitutes, and wherein having one deck insulating material at least is polyimides.
A kind of square-section stranded conductor press shaped device, comprise frame and rack-mounted mould, described mould is a rolling forging die, this rolling forging die is made of a pair of pinch roller of in vertical direction, arranging down and the pinch roller of a pair of left and right layout in the horizontal direction, the wheel rim of pinch roller is the face of cylinder, and the wheel rim of four pinch rollers surrounds space, a square-section; Described pinch roller has axis and pinch roller seat, and the two ends of axis connect the pinch roller seat respectively.
Described pinch roller cooperates with the axis back rotation, and the two ends of axis are fixed on the pinch roller seat.
Described pinch roller cooperates with the axis back rotation, and matching part is provided with bearing, and the two ends of axis are fixed on the pinch roller seat.
Described pinch roller seat and frame are rail/groove sliding matching structure, be respectively equipped with the spacing that is provided with vertical pinch roller, horizontal pinch roller and adjust bolt on frame, adjust bolt and are spirally connected with separately pinch roller seat respectively.
Described adjustment bolt is furnished with locking nut.
The processing method of a kind of above-mentioned square-section stranded conductor, lead is pressed shaped device to be arranged in the stranded conductor production line, make the mould of this shaped device be positioned at the twisting point of lead, lead runs through in the mould, move along the conductor length direction, adjust the relative position of each core of lead by mould, make it be orderly regularly arranged, the cross section profile of standard lead is a rectangle.
The advantage of the square-section stranded conductor of said structure is:
Because the lead moulding mainly is to realize by the relative position of adjusting core, the core queueing discipline, each core distortion is little and deformation extent is consistent, the gap is even, and the top layer is smooth, and four arc chord angle sizes are consistent, the square-section moulding is regular, it is wrapped to be beneficial to insulating barrier, reduces the around-packing technology difficulty, guarantees insulation quality, reduced the electrion probability effectively, simultaneously guaranteed that again the oxide-film of conductive line surfaces is not destroyed, reduced harmonic impedance to greatest extent, provide guarantee for improving its electrical property.
The advantage of above-mentioned reactor winding wire is:
Except that the advantage of lead itself, its insulating barrier is a composite construction.Wherein the permission of NOMEX insulating paper is directly wrapped in conductive line surfaces or wrapped outside polyimides, the wrapped again polyimide film of skin.Polyimides is that current temperature resistant grade is the highest, mechanical property, dielectric property, the best macromolecular material of decay resistance, and temperature resistant grade can reach 482 ℃.Adopt composite insulation structure simultaneously, indexs such as its insulation level, voltage withstand class and temperature resistant grade can satisfy the requirement that exchanges 1000kV, direct current ± 800kV dry reactor winding wire fully.
Above-mentioned advantage of pressing shaped device is:
Owing to adopt rolling forging die, during guidewire movement, with mould sliding friction does not take place, the top layer lead can not scratch, no burr.2, because mould and lead have only rolling friction, do not have force of sliding friction, mould is not easy to wear, long service life.3, the size adjustable of mould can be processed the lead of multiple close specification, so the specification of mould is few, cost is low.4, because mould is the branch body structure, detachable during die change, need not take the lead to draw to conductor again, simple and efficient to handle, labor strength is little.5, conductor cross-section dimensional accuracy height, positive and negative deviation is not more than 0.05mm.
Be example with interchange 1000kV, direct current ± 800kV dry reactor winding wire below, describe the present invention in detail.
Description of drawings
Fig. 1 is central core reactor winding cross-sectional view when being (1 * 1) root lead
Fig. 2 is central core reactor winding cross-sectional view when being (1 * 2) root lead
Fig. 3 is central core reactor winding cross-sectional view when being (1 * 3) root lead
Fig. 4 is central core reactor winding cross-sectional view when being (1 * 4) root lead
Fig. 5 is central core reactor winding cross-sectional view when being (2 * 4) root lead
Fig. 6 is central core reactor winding cross-sectional view when being (2 * 2) root lead
Fig. 7 is central core reactor winding cross-sectional view when being (2 * 3) root lead
Reactor winding cross-sectional view when Fig. 8 is no central core lead
Fig. 9 presses the structural representation of shaped device
Code name implication among the figure:
The 20-outer layer insulation; The insulation of 30-middle level; The 40-primary insulation; The outer layer conductor of 50-; 60-intermediate layer lead; 70-central core lead;
The vertical pinch roller of 1-; The horizontal pinch roller of 2-; The vertical wheel pressing shaft of 3-; The vertical pinch roller spacing of 4-is regulated bolt; The horizontal pinch roller spacing of 5-is regulated bolt; 6-vertical adjusting bolt locking nut; 7-horizontal adjustment bolt locking nut; 8-lead (workpiece); The 9-vertical guide rail; The 10-horizontal guide rail; The 11-frame; The horizontal wheel pressing shaft of 12-; The vertical pinch roller bearing of 13-; The horizontal pinch roller bearing of 14-.
Embodiment
Referring to Fig. 1 to Fig. 8: listed the winding wire of 8 kinds of different arrangement architectures among the figure, this winding wire has central core lead 70, intermediate layer lead 60, outer layer conductor 50, primary insulation 40, middle level insulation 30, outer layer insulation 20.
The technological difficulties of producing this winding wire have three, and the one, how could when the lead moulding, make the core queueing discipline, be out of shape as far as possible little, thereby guarantee that the square-section is regular, the 2nd, how could when the lead moulding, not be scratched by the top layer core, no burr, oxide protective layer is not damaged; The 3rd, select any insulating material, could satisfy the specification requirement that exchanges 1000kV, direct current ± 800kV dry reactor.Existing division is as follows:
One, to make the core structure of lead be orderly regularly arranged, two key problem in technology are arranged.
1, the core structural design of target product.Not to be that the lead of any structure can both be pressed into regularly arranged, only meets stranded core arrangement regulation, and after being pressed into the square-section, its core could be regularly arranged.Will be according to cross section geometry, the nominal area of section of target product, the design lines cored structure comprises wire core diameter, quantity, permutation and combination method, and Fig. 1～Fig. 8 has listed 8 kinds of core arrangement architectures respectively, these 8 kinds of structures are the preferred plan that the prolonged and repeated experiment of inventor optimizes, and should preferentially adopt.After shaped device pressed, the core of product is matrix form or honeycomb fashion is arranged (matrix form only is shown among the figure), and generally speaking, the square-section length-width ratio is little, was matrix form and arranged, and length-width ratio is big, was honeycomb fashion and arranged.Core is arranged as hierarchy, and the core number of each layer is increased progressively to skin by central core, and satisfies following formula:
M＝n+(n+8)+(n+8+8)+…
In the formula: M is a lead core sum
N is a central core core number, n=1.2.3 ...
2, improve process.Existing technology is two one-step forming technologies, earlier lead is twisted into circle, twisted wire with circle is drawn into the square-section with shaped device again, because the stranded moulding of lead will change the relative position relation between its core, rearrange, impossible, so can only make the core distortion by applying powerful extrusion force, dwindle the core gap, make the cross section profile of lead become rectangle.The present invention adopts one-step shaping technology, directly the mould of shaped device is arranged in the twisting point of lead, lead runs through in the mould, move along the conductor length direction, adjust the relative position of each core of lead by mould, make it be orderly regularly arranged, the cross section profile of standard lead is a rectangle, and this is the essential distinction of the present invention and traditional handicraft.
Two, the structural design of shaped device is wanted rationally.Referring to Fig. 9: this square-section stranded conductor press shaped device, comprise frame 11 and the mould that is installed on the frame 11, this mould is made of a pair of pinch roller of in vertical direction, arranging down 1 and the pinch roller 2 of a pair of left and right layout in the horizontal direction, the wheel rim of pinch roller 1,2 is faces of cylinder, and the wheel rim of four pinch rollers surrounds space, a square-section.
The using method of this shaped device:
This shaped device is arranged in the production line of stranded conductor 8, the end of a thread of lead 8 is penetrated mould, and make its mould be positioned at the twisting point of stranded conductor 8, turn and adjust bolt 4,5, regulate the spacing of vertical pinch roller 1, horizontal pinch roller 2, make the space sectional dimension of mould consistent, tighten locking nut 6,7 with the sectional dimension of target product, loosening to prevent adjusting bolt 4,5 rollbacks.Start stranding machine, admission machine then, lead 8 is in stranded moulding, and its cross sectional shape also is extruded into rectangle.
Owing to adopt rolling forging die, during guidewire movement, with pinch roller sliding friction does not take place, the top layer lead can not scratch, no burr.Because pinch roller and lead have only rolling friction, do not have sliding friction, pinch roller is not easy to wear, long service life.The size adjustable of pinch roller can be processed the rectangular conductor of plurality of specifications, so the specification of pinch roller, quantity are few, cost is low, and the range of work is big.Because mould is the branch body structure, and is detachable during replacing, need not take the lead to draw to conductor again, simple and efficient to handle, labor strength is little, and energy consumption is low.Conductor cross-section dimensional accuracy height, positive and negative deviation is not more than 0.05mm.
Three, adopt new insulating material, solve the dielectric strength problem.
Polyimides is that current temperature resistant grade is the highest, mechanical property, dielectric property, the best macromolecular material of decay resistance, but never be used as cable insulation, the present invention uses this material, it is the winding insulation that is used for motor, transformer, reactor, wherein, exchange the winding wire of 1000kV, direct current ± 800kV reactor, primary insulation 3 adopts the polyimides twining package tape, the NOMEX twining package tape is adopted in intermediate layer insulation 2, outer layer insulation 1 adopts the polyimides twining package tape, our experiments show that, satisfy the specification requirement that exchanges 1000kV, direct current ± 800kV reactor fully.
Be necessary explanation, technical scheme of the present invention is to form in the process of research and development interchange 1000kV, direct current ± 800kV reactor winding wire, but this technical scheme range of application never only only limits to exchange 1000kV, direct current ± 800kV reactor, can be widely used in motor, electrical equipment manufacturing field, for example, high-rating generator, motor, transformer etc.
Claims (10)
1. a square-section stranded conductor forms by the multiply core is stranded, it is characterized in that the core of described lead is regularly arranged.
2. square-section according to claim 1 stranded conductor is characterized in that, the queueing discipline of described core is matrix form or honeycomb fashion.
3. according to claim 1 or 2 described square-section stranded conductors, it is characterized in that described core is arranged as hierarchy, the core number of each layer is increased progressively to skin by central core, and satisfies following formula:
M＝n+(n+8)+(n+8+8)+…
In the formula: M is a lead core sum
N is a central core core number, n=1.2.3 ...
4. one kind is used as the rectangle winding wire that exchanges 1000kV, direct current ± 800kV reactor, comprise conductor and be coated on the insulating barrier of conductive surface, it is characterized in that, described conductor adopts square-section as claimed in claim 1 stranded conductor, described insulating barrier is the composite insulation layer that multiple layers of different materials constitutes, and wherein having one deck insulating material at least is polyimides.
5. a square-section stranded conductor presses shaped device, comprise frame and rack-mounted mould, it is characterized in that, described mould is a rolling forging die, this rolling forging die is made of a pair of pinch roller of in vertical direction, arranging down and the pinch roller of a pair of left and right layout in the horizontal direction, the wheel rim of pinch roller is the face of cylinder, and the wheel rim of four pinch rollers surrounds space, a square-section; Described pinch roller has axis and pinch roller seat, and the two ends of axis connect the pinch roller seat respectively.
6. square-section according to claim 5 stranded conductor press shaped device, it is characterized in that described pinch roller cooperates with the axis back rotation, the two ends of axis are fixed on the pinch roller seat.
7. square-section according to claim 5 stranded conductor press shaped device, it is characterized in that described pinch roller cooperates with the axis back rotation, matching part is provided with bearing, the two ends of axis are fixed on the pinch roller seat.
8. square-section according to claim 5 stranded conductor press shaped device, it is characterized in that, described pinch roller seat and frame are rail/groove sliding matching structure, on frame, be respectively equipped with the spacing that is provided with vertical pinch roller, horizontal pinch roller and adjust bolt, adjust bolt and be spirally connected with separately pinch roller seat respectively.
9. square-section according to claim 8 stranded conductor press shaped device, it is characterized in that described adjustment bolt is furnished with locking nut.
10. the processing method of an above-mentioned square-section stranded conductor, lead is pressed shaped device to be arranged in the stranded conductor production line, make the mould of this shaped device be positioned at the twisting point of lead, lead runs through in the mould, move along the conductor length direction, adjust the relative position of each core of lead by mould, make it be orderly regularly arranged, the cross section profile of standard lead is a rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100226037A CN100557722C (en) | 2006-12-23 | 2006-12-23 | Square-section stranded conductor and processing method thereof and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100226037A CN100557722C (en) | 2006-12-23 | 2006-12-23 | Square-section stranded conductor and processing method thereof and device |
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| CN101013615A true CN101013615A (en) | 2007-08-08 |
| CN100557722C CN100557722C (en) | 2009-11-04 |
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| CN102063957A (en) * | 2010-10-13 | 2011-05-18 | 南京全信传输科技股份有限公司 | High capacity rectangular flexible cable and preparation technology thereof |
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| CN102568697A (en) * | 2010-12-31 | 2012-07-11 | 上海慧高精密电子工业有限公司 | Bridge rectifier wire molding device |
| CN104240845A (en) * | 2014-08-18 | 2014-12-24 | 芜湖卓越线束***有限公司 | Pressing tool and forming die for electric wire forming |
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| US4473716A (en) * | 1981-11-12 | 1984-09-25 | New England Electric Wire Corporation | Compacted fine wire cable and method for producing same |
| CN2138826Y (en) * | 1992-10-10 | 1993-07-21 | 中国华北电力联合公司北京电力设备总厂 | Complement strong pressure square aluminium twisting wire hollow core strong current coil |
| CN1097893A (en) * | 1993-07-18 | 1995-01-25 | 马春秋 | Rectangular aluminium cable wire |
| JP3613994B2 (en) * | 1998-02-12 | 2005-01-26 | トヨタ自動車株式会社 | Flat wire coil manufacturing apparatus and flat wire coil manufacturing method |
| CN201000790Y (en) * | 2006-12-23 | 2008-01-02 | 特变电工(德阳)电缆股份有限公司 | Extrusion forming device for rectangular section stranded conductor |
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- 2006-12-23 CN CNB2006100226037A patent/CN100557722C/en active Active
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| CN102063957A (en) * | 2010-10-13 | 2011-05-18 | 南京全信传输科技股份有限公司 | High capacity rectangular flexible cable and preparation technology thereof |
| CN102568697A (en) * | 2010-12-31 | 2012-07-11 | 上海慧高精密电子工业有限公司 | Bridge rectifier wire molding device |
| CN102290131A (en) * | 2011-06-08 | 2011-12-21 | 江苏朗顺电工电气有限公司 | Direct-welding rectangular high-frequency Litz wire and production method thereof |
| CN102544775A (en) * | 2012-02-28 | 2012-07-04 | 吴延书 | Multi-core lead electric connection method and fixing device |
| CN104240845A (en) * | 2014-08-18 | 2014-12-24 | 芜湖卓越线束***有限公司 | Pressing tool and forming die for electric wire forming |
| CN104240845B (en) * | 2014-08-18 | 2016-06-22 | 芜湖卓越线束***有限公司 | Pressing tool and mould for electric wire molding |
| CN104700965A (en) * | 2015-03-18 | 2015-06-10 | 中天科技装备电缆有限公司 | Preparation method and compacting stranding device of compacting soft structure conductor |
| CN107885920A (en) * | 2017-10-27 | 2018-04-06 | 扬州大学 | A kind of Optimization Design of square-section radiator fin |
| CN109767860A (en) * | 2019-01-28 | 2019-05-17 | 东莞中子科学中心 | A kind of medium-high frequency electrically with twisting formula litz wire, production method and producing device again |
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