CN115410809A - Light dry-type air-core reactor and manufacturing method thereof - Google Patents
Light dry-type air-core reactor and manufacturing method thereof Download PDFInfo
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- CN115410809A CN115410809A CN202210962932.9A CN202210962932A CN115410809A CN 115410809 A CN115410809 A CN 115410809A CN 202210962932 A CN202210962932 A CN 202210962932A CN 115410809 A CN115410809 A CN 115410809A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
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Abstract
A light-weight dry air-core reactor, comprising: the winding structure comprises a bus frame, a winding layer and an insulating cushion block, wherein the winding layer is of a cylindrical structure; the bus frames are respectively arranged at the upper end and the lower end of the winding layer, and the two bus frames at the upper end and the lower end are connected through a fastening structure and fasten the winding layer; an insulating cushion block is arranged between the bus frame and the winding layer; the fastening structure is an insulating pull rod structure or an insulating pull belt structure. The reactor adopts a dry winding impregnation light structure, so that the manufacturing cost of the dry type air reactor is effectively reduced, and the production efficiency of products is improved. A supporting strip structure exists between each winding layer of the reactor, and the reactor has good heat dissipation performance; the aluminum stranded wire or the transposed aluminum conductor is adopted, so that the application range is wider; the multi-strand composite wire or transposition wire is adopted for winding, so that the failure rate of the product is lower.
Description
Technical Field
The invention belongs to the technical field of reactors, and particularly relates to a light dry-type air-core reactor and a manufacturing method thereof.
Background
The dry-type air reactor product is one of important products in a power grid power supply and distribution system, and is mainly used for filtering each harmonic current of a power grid, limiting the short-circuit current level of a line, compensating the reactive capacity and the flat wave of the line and the like. In the international market, dry-type air-core reactors are mainly divided into an epoxy-encapsulated heavy structure and a dry-wound impregnated light structure, and each structure has respective advantages and disadvantages. The light structure has the advantages of good heat dissipation performance and small material consumption, and the light dry-type air-core reactor has great advantages in alternating current and direct current reactor products.
At present, dry-type air-core reactors with light structures in international markets and domestic markets have strong competitiveness, however, the dry-type air-core reactors manufactured according to the conventional method still have the defects of large size, high cost and the like, the manufacturing processes are multiple and time-consuming, particularly in terms of electric parameters of the reactors, the size and the weight of the reactors are changed, local temperature is overhigh, turn-to-turn insulation breakdown and the like exist, and serious safety accidents are easily caused.
Chinese patent (CN 113113113216A) discloses a light reactor, which comprises a plurality of coaxially arranged envelopes, wherein the envelopes are bonded through gummed insulating layers, star-shaped frames are respectively arranged at the upper end and the lower end of each envelope, a connecting terminal is respectively arranged on each star-shaped frame, a support is arranged below the star-shaped frame at the lower end, and a base is arranged below the support. The reactor can lead to more stable and firm encapsulation, and greatly reduce the weight of the reactor, but the measures for realizing the weight reduction of the reactor product by removing the traditional reactor supporting strip structure have great disadvantages and hidden dangers. Because the supporting strips between the reactor packaging layers play a role of a heat dissipation channel in the product structure, the heat in the reactor wire can not be dissipated through the channel smoothly without the supporting strip structure, and the product is very easy to have overhigh local temperature, thereby further causing the phenomena of accelerated thermal aging of insulation, turn-to-turn insulation breakdown and the like. This patent is only applicable to small reactor coils with a small amount of heat generation.
Chinese patent (CN 114582605A) discloses an open current-limiting reactor and a manufacturing method thereof, wherein the open current-limiting reactor comprises a winding and a coil clamping device, the winding comprises a plurality of insulating plates and a coil, a plurality of clamping grooves for accommodating the coil are formed in the insulating plates, the winding is connected with the coil clamping device to clamp and fix the winding, the coil clamping device comprises an upper star-shaped frame, a lower star-shaped frame and an insulating pull rod, the upper star-shaped frame and the lower star-shaped frame are respectively arranged at the upper end part and the lower end part of the winding, and the upper star-shaped frame and the lower star-shaped frame are connected through the insulating pull rod. The manufacturing process is less, the whole weight is reduced, the size is reduced, and the heat dissipation capacity of the reactor is enhanced. The wire is not provided with an insulating film structure, turn-to-turn insulation is only separated by sawteeth of an insulating plate for insulation, and the safety of the turn-to-turn insulation of the wire is very low. Because under the impact voltage, the flashover discharge along the surface is very easy to occur between the conducting wires of the coil structure and the conducting wires. The conducting wire wrapped with the insulating film is protected by a plurality of layers of insulating films under the impact voltage, and the insulating films can bear a certain impact voltage value each time. Therefore, the turn-to-turn initial discharge voltage of the wire of the above patent is generally lower than that of the coil wrapped with the insulating film material. In addition, since the serrated insulating plate mentioned in the patent has a processing limitation, when the inductance value of the reactor is large, the number of turns of the coil needs hundreds of turns, and the patent relates to that the coil cannot be produced in a factory. Therefore, the coil with the structure is only suitable for products with small inductance, limited coil turns and low product insulation requirements.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a light dry-type air reactor and a manufacturing method thereof.
The invention adopts the following technical scheme:
a light-weight dry air-core reactor, comprising: the winding structure comprises a bus frame, a winding layer and an insulating cushion block, wherein the winding layer is of a cylindrical structure; the bus frames are respectively arranged at the upper end and the lower end of the winding layer, and the two bus frames at the upper end and the lower end are connected through a fastening structure and fasten the winding layer; an insulating cushion block is arranged between the bus frame and the winding layer; the fastening structure is an insulating pull rod structure or an insulating pull belt structure.
As a preferred embodiment of the present invention, the winding layer includes a reactor coil, the reactor coil is formed by winding an aluminum stranded wire or a transposed aluminum conductor, 2 to 3 layers of insulating films are wrapped on the reactor coil, the outermost side of the reactor coil includes a glass fiber cloth tape, and the thickness of the glass fiber cloth tape is 0.1mm to 0.3mm.
In a preferred embodiment of the present invention, the wire is formed by twisting a plurality of small-pitch diameter aluminum wires or transposed aluminum wires, and the single-strand aluminum wire is wrapped with one or more insulating films.
In a preferred embodiment of the present invention, the insulating film is made of a polyester film or a polyimide film.
As a preferred embodiment of the present invention, when the fastening structure is an insulation pull rod, it includes a pull rod type upper mitre bar, a pull rod type winding layer, a pull rod type lower mitre bar, and a pull rod type insulation support.
As a preferred embodiment of the present invention, when the fastening structure is an insulation drawstring, it includes a drawstring-type upper core frame, a drawstring-type winding layer, a drawstring-type lower core frame, and a drawstring-type insulation support.
As a preferred embodiment of the present invention, the pull rod type winding layer is fixed by pulling in the boom insulating pull rod and the boom insulating pull rod, and the boom insulating pull rod are fixed on the pull rod type winding layer by the boom insulating cushion block and the boom insulating cushion block, respectively.
In a preferred embodiment of the present invention, the tie-rod-type upper core assembly, the tie-rod-type winding layer, and the tie-rod-type lower core assembly are disposed above the tie-rod-type insulating support.
As a preferred embodiment of the present invention, the drawstring type winding layer is tightened and fixed by a weftless strapping tape, the upper end of the weftless strapping tape is fixed on the drawstring type upper boom circular aluminum columns at both sides of the drawstring type upper header boom of the present invention through a drawstring type upper boom and a winding layer insulation cushion block, and the lower end of the weftless strapping tape is fixed on the drawstring type lower boom elliptical adjusting aluminum columns installed at the later stage at both sides of the drawstring type lower header of the present invention through a drawstring type lower boom and a winding layer insulation cushion block.
In a preferred embodiment of the invention, the drawstring type upper core manifold, the drawstring winding layer and the drawstring type lower core manifold are arranged above the drawstring type insulating struts.
A method of manufacturing a light-weight dry air-core reactor as described above, characterized by:
the manufacturing method comprises the following steps:
and 4, conveying the dried and cured winding layer out of the drying furnace, cooling, removing the pressing tool, and finally forming the product after wire heading, coil finishing, coil surface spraying of primer, finish paint and RTV-II ultraviolet-proof paint.
In a preferred embodiment of the present invention, in step 1, a glass cloth is laid on the winding mold to protect the wire, and the winding mold is provided with a wire pressing tool.
In a preferred embodiment of the present invention, in step 3, winding layer paint is dripped for 0.5 to 1 hour after the paint dipping is completed, and then the winding layer paint is sent into a drying furnace for drying and curing.
Compared with the prior art, the invention has the beneficial effects that:
(1) There is the stay structure between each winding layer of this light-duty reactor product, and the product possesses good heat dissipation passageway and heat dissipation condition, not only can be applicable to the small capacity shape reactor product, also can be applicable to large capacity reactor product design. Meanwhile, in the product design, the whole heat dissipation system of the coil can be adjusted by adjusting the width of the stay, so that the optimal heat dissipation condition design of the coils with different sizes is realized.
(2) The light reactor product adopts the aluminum stranded wire or the transposed aluminum conductor which is wrapped by the glass fiber cloth and the insulating film together, has large turn-to-turn insulation safety margin, and is suitable for the design of reactor products of low, medium, high, ultrahigh and extra-high voltage systems. In addition, the structure of the light reactor product is not limited by related accessories, and the light reactor product can be suitable for designing reactors with larger inductance values.
(3) The traditional epoxy encapsulation product is easy to have gaps at the outgoing line of the conducting wire of each encapsulation layer. In order to avoid rain water from encapsulating, a rain hat is usually provided above the reactor product. The light product of the patent adopts integral gum dipping (process), no gap risk exists, and a rain-proof cap is not needed to be configured.
(4) Influenced by the technological conditions of light-duty reactor product, this light-duty product coil of patent can only adopt stranded conductor or transposed conductor to wind, and no monofilament wire winding form does not have wire root broken string risk, and the fault rate of product is low. For a large-capacity reactor product, a plurality of strands of transposed aluminum wires are adopted for winding, the loss of the product is small, the turn-to-turn insulation margin of the wires is large, and the product performance is good.
(5) The wires of each layer of the traditional epoxy encapsulating product are wrapped by thicker epoxy glass yarns. Because the glass yarn is wound in a rope shape in the winding process, the amount of the yarn to be wrapped is large in order to meet the requirement of compactness in the process realization, and the whole weight of the coil is heavy. The wire and the surface of the light product are wrapped by glass fiber tapes with large warp and weft density, and the whole glue dipping and curing are carried out after the coil winding is finished. The coil has an overall weight that is more than 30% lighter than the weight of the encapsulated product. In addition, the number of suspension arms and the number of bottom supporting insulators required by a light product under the same technical condition are less, and the product loss control and the earthquake resistance design are facilitated. In the flexible direct-current transmission project of the offshore wind power project, the light scheme has important significance for the lightweight design of the whole offshore platform.
(6) Under the same parameters, the heat dissipation channel forms and structures of the epoxy encapsulation product and the light solution product are the same, so that the wire dosage of the two solutions is basically consistent. The main source of the lighter weight version of the coil than the encapsulated version is primarily in the weight of the epoxy encapsulation. The insulating layer of the light product is thinner than the encapsulated product, so that the heat dissipation performance of the wire is better than that of the encapsulated product in the product operation process.
(7) Under the same technical conditions, the light product of the patent has smaller outer diameter size than the encapsulated product. And the larger the capacity of the reactor product is, the more obvious the size advantage of the light scheme product is. For the equipment installation site with limited partial land area, the size reduction of the reactor can effectively reduce the antimagnetic range of the product, thereby reducing the whole floor area of the reactor.
(8) The light product of the patent is lower than the encapsulated product under the same parameter condition.
Drawings
FIG. 1 is a schematic diagram of a finished product of an insulation pull rod fastening type light reactor;
FIG. 2 is an enlarged view of the upper part of an insulating pull rod fastening type light reactor coil;
FIG. 3 is a schematic diagram of a finished product of the insulated pull-belt fastening type light-duty reactor;
FIG. 4 is an enlarged view of the upper portion of an insulation pull strap fastened light-duty reactor coil;
FIG. 5 is an enlarged view of the lower portion of an insulation pull strap fastening type light-duty reactor coil;
FIG. 6 is an enlarged view of an insulating cushion block used at the joint of each packaging layer and a suspension arm of the insulating pull rod fastening type light reactor;
FIG. 7 is an enlarged view of a ventilation strip used between winding layers of an insulating pull rod fastening type light reactor;
fig. 8 is an enlarged view of an insulating tie for a compact winding layer of the insulating tie fastening type light reactor;
FIG. 9 is a three-dimensional view of an L-shaped support plate for connecting a suspension arm and an insulation pull rod in the insulation pull rod fastening type light reactor;
FIG. 10 is an enlarged view of an insulation pad block used between suspension arms of an insulation pull rod fastening type light reactor
FIG. 11 is an enlarged view of an insulation cushion block used at the joint of an encapsulation layer and a suspension arm of the insulation pull belt fastening type light reactor;
description of reference numerals:
1-pull rod type Chinese character 'mi' manifold; 2-a tie-bar winding layer; 3-a pull rod type lower Chinese character Mi flow-collecting rack; 4-a tie-rod type insulating post; 5-insulating pull rod at the suspension arm; a 6-L-shaped support plate; 7-a single winding layer of the tie-rod type; 8-tie rod type inter-layer winding ventilation strips; 9-inter-boom insulating tie rods; 10-an inter-boom insulation cushion block; 11-insulating cushion blocks at the suspension arms; 12-a pull belt type Chinese character 'mi' character flow-collecting rack; 13-a tape winding layer; 14-a pull belt type lower Chinese character mi flow-collecting frame; 15-a pull-strap insulating strut; 16-drawstring transition supports; 17-a drawstring type upper outlet terminal plate; 18-a drawstring type upper boom circular aluminum column; 19-a weftless binding tape; 20-insulating cushion blocks between the upper lifting arm and the winding layer of the drawstring type; 21-a drawstring lower outlet terminal plate; 22-a pull belt type lower suspension arm oval adjusting aluminum column; and 23-a pull belt type lower suspension arm and a winding interlayer insulation cushion block.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Fig. 1 and 3 are schematic diagrams of finished products of an insulation pull rod fastening type light-duty reactor and an insulation pull strip fastening type light-duty reactor, respectively, and as shown in fig. 1 and 3, the light-duty dry type air core reactor comprises a bus bar frame, a winding layer and an insulation cushion block.
The winding layer is cylindrical structure, and the frame that converges sets up the upper and lower both ends on winding layer respectively, and two of upper and lower both ends converge the frame and pass through fastening structure and connect to fasten winding layer, converge and be provided with insulating cushion between frame and the winding layer, fastening structure is insulating pull rod structure or insulating stretching strap structure.
The winding layer comprises a reactor coil, the reactor coil is formed by winding an aluminum stranded wire or a transposed aluminum conductor, 2-3 layers of insulating films wrap the reactor coil, the outermost side of the reactor coil comprises a glass fiber cloth belt, the thickness of the glass fiber cloth belt is 0.1-0.3 mm, the conductor is formed by stranding a plurality of small-pitch-diameter aluminum conductors or a transposed aluminum conductor, and a single-strand aluminum conductor wraps one or more layers of insulating films.
The insulating film is made of polyester film or polyimide film.
As shown in fig. 1, 2, and 6 to 10, when the fastening structure is an insulating pull rod, it includes a pull rod type upper parallel-shaped bus frame 1, a pull rod type winding layer 2, a pull rod type lower parallel-shaped bus frame 3, and a pull rod type insulating pillar 4.
The pull rod type winding layer 2 comprises a plurality of pull rod type single winding layers 7, the diameters of the pull rod type single winding layers 7 are sequentially reduced, the pull rod type single winding layers 7 are uniformly distributed in a concentric shaft mode, and a pull rod type inter-winding ventilation strip 8 is arranged between every two adjacent pull rod type single winding layers 7.
The pull rod type winding layer 2 is fixedly pulled in through an insulating pull rod 5 at the suspension arm position and an insulating pull rod 9 between the suspension arms, the insulating pull rod 5 at the suspension arm position and the insulating pull rod 9 between the suspension arms are respectively fixed on the pull rod type winding layer 2 through an insulating cushion block 11 at the suspension arm position and an insulating cushion block 10 between the suspension arms, and the insulating pull rod 5 at the suspension arm position and the insulating cushion block 11 at the suspension arm position are connected through an L-shaped support plate 6. The pull rod type upper Mi-shaped confluence frame 1, the pull rod type winding layer 2 and the pull rod type lower Mi-shaped confluence frame 3 are arranged above the pull rod type insulating support 4.
The insulating pull rod is an epoxy pull rod, two end parts of the insulating pull rod are respectively provided with a metal sleeve head, and a nut, a spring washer and a flat washer are sequentially distributed from the metal sleeve head of the end part to the middle.
As shown in fig. 3 to 5 and 11, when the fastening structure is an insulation drawstring, it includes a drawstring type upper mi-hui former 12, a drawstring type winding layer 13, a drawstring type lower mi-hui former 14 and a drawstring type insulation strut 15.
The drawstring type winding layer 13 is tensioned and fixed through a weftless binding tape 19, the upper end of the weftless binding tape 19 is fixed on a drawstring type upper suspension arm circular aluminum column 18 at two sides of a drawstring type upper Chinese character 'mi' manifold frame 12 suspension arm through a drawstring type upper suspension arm and winding layer insulation cushion block 20, and the lower end is fixed on a drawstring type lower suspension arm oval adjusting aluminum column 22 installed at the later stage at two sides of a drawstring type lower Chinese character 'mi' manifold frame 14 suspension arm through a drawstring type lower suspension arm and winding layer insulation cushion block 23. The drawstring type upper Mi-manifold frame 12, the drawstring type winding layer 13 and the drawstring type lower Mi-manifold frame 14 are arranged above drawstring type insulating pillars 15, and drawstring type transition supports 16 are arranged below the drawstring type insulating pillars 15. The end of the drawstring-type upper meter-shaped confluence rack 12 is also provided with a drawstring-type upper outlet terminal board 17, and the end of the drawstring-type lower meter-shaped confluence rack 14 is also provided with a drawstring-type lower outlet terminal board 21.
A manufacturing method of a light-weight dry air-core reactor as described above, comprising the steps of:
and 4, conveying the dried and cured winding layer out of the drying furnace, cooling, removing the pressing tool, finishing the coil by using a lead, spraying primer and finish paint on the surface of the coil and finally forming the product by using RTV-II ultraviolet-proof paint.
In the step 1, glass fiber cloth is laid on the winding mould to protect the wires, and a wire pressing tool is provided.
And step 3, dripping the winding layer after the dip coating is finished for 0.5 to 1 hour, and then sending the winding layer into a drying furnace for drying and curing.
Compared with the prior art, the invention has the beneficial effects that:
(1) There is the stay structure between each winding layer of this light-duty reactor product of patent, and the product possesses good heat dissipation channel and heat dissipation condition, not only can be applicable to the small capacity shape reactor product, also can be applicable to large capacity reactor product design. Meanwhile, in the product design, the whole heat dissipation system of the coil can be adjusted by adjusting the width of the stay, so that the optimal heat dissipation condition design of the coils with different sizes is realized.
(2) The light reactor product adopts the aluminum stranded wire or the transposed aluminum conductor which is wrapped by the glass fiber cloth and the insulating film together, has large turn-to-turn insulation safety margin, and is suitable for the design of reactor products of low, medium, high, ultrahigh and extra-high voltage systems. In addition, the structure of the light reactor product is not limited by related accessories, and the light reactor product can be suitable for designing reactors with larger inductance values.
(3) Conventional epoxy encapsulation products are prone to gaps at the wire outlet of each encapsulation layer. In order to avoid rainwater from encapsulating, a rain hat is generally disposed above the reactor product. The light product of the patent adopts integral gum dipping (process), no gap risk exists, and a rain-proof cap is not needed to be configured.
(4) Influenced by the technological conditions of light-duty reactor product, this light-duty product coil of patent can only adopt stranded conductor or transposed conductor to wind, and no monofilament wire winding form does not have wire root broken string risk, and the fault rate of product is low. For a large-capacity reactor product, a plurality of strands of transposed aluminum wires are adopted for winding, the loss of the product is small, the turn-to-turn insulation margin of the wires is large, and the product performance is good.
(5) Each layer of wire of the traditional epoxy encapsulating product is wrapped by thicker epoxy glass yarn. Because the glass yarn is wound in a rope shape in the winding process, the amount of the yarn to be wrapped is large in order to meet the requirement of compactness in the process realization, and the whole weight of the coil is heavy. The wire and the surface of the light product are wrapped by glass fiber tapes with large warp and weft density, and the whole glue dipping and curing are carried out after the coil winding is finished. The coil has an overall weight that is more than 30% lighter than the weight of the encapsulated product. In addition, the number of suspension arms and the number of bottom supporting insulators required by a light product under the same technical condition are less, and the product loss control and the earthquake resistance design are facilitated. In the flexible direct-current transmission project of the offshore wind power project, the light scheme has important significance for the lightweight design of the whole offshore platform.
(6) Under the same parameters, the heat dissipation channel forms and structures of the epoxy encapsulation product and the light solution product are the same, so that the wire dosage of the two solutions is basically consistent. The main source of the lighter weight version of the coil than the encapsulated version is primarily in the weight of the epoxy encapsulation. The insulating layer of the light product is thinner than the encapsulated product, so that the heat dissipation performance of the wire is better than that of the encapsulated product in the product operation process.
(7) Under the same technical conditions, the light product of the patent has smaller outer diameter size than the encapsulated product. And the larger the capacity of the reactor product is, the more obvious the size advantage of the light scheme product is. For equipment installation sites with limited partial land area, the size reduction of the reactor can effectively reduce the antimagnetic range of the product, thereby reducing the whole floor area of the reactor.
(8) The light product of the patent has lower price than the encapsulated product under the same parameters.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. A light-weight dry air-core reactor, comprising: frame, winding layer and insulating cushion converge, its characterized in that:
the winding layer is of a cylindrical structure;
the bus frames are respectively arranged at the upper end and the lower end of the winding layer, and the two bus frames at the upper end and the lower end are connected through a fastening structure and fasten the winding layer;
an insulating cushion block is arranged between the bus frame and the winding layer;
the fastening structure is an insulating pull rod structure or an insulating pull belt structure.
2. A light-weight dry air-core reactor according to claim 1, characterized in that:
the winding layer comprises a reactor coil, the reactor coil is formed by winding an aluminum stranded wire or a transposed aluminum conductor, 2-3 layers of insulating films are wrapped on the reactor coil, the outermost side of the reactor coil comprises a glass fiber cloth belt, and the thickness of the glass fiber cloth belt is 0.1-0.3 mm;
the wire is formed by twisting a plurality of strands of small-pitch-diameter aluminum wires or transposed aluminum wires, and the single-strand aluminum wire is wrapped by one or more layers of insulating films.
3. A light-weight dry air-core reactor according to claim 2, characterized in that:
the insulating film is made of polyester film or polyimide film.
4. A light-weight dry air-core reactor according to claim 1, characterized in that:
when the fastening structure is an insulating pull rod, the fastening structure comprises a pull rod type upper parallel-shaped confluence frame (1), a pull rod type winding layer (2), a pull rod type lower parallel-shaped confluence frame (3) and a pull rod type insulating strut (4).
5. A light-weight dry air-core reactor according to claim 1, characterized in that:
when the fastening structure is an insulating drawstring, the fastening structure comprises a drawstring type upper Mi-manifold frame (12), a drawstring type winding layer (13), a drawstring type lower Mi-manifold frame (14) and a drawstring type insulating strut (15).
6. A light-weight dry air-core reactor according to claim 4, characterized in that:
the pull rod type winding layer (2) is pulled in and fixed through an insulating pull rod (5) at the suspension arm position and an insulating pull rod (9) between the suspension arms, and the insulating pull rod (5) at the suspension arm position and the insulating pull rod (9) between the suspension arms are fixed on the pull rod type winding layer (2) through an insulating cushion block (11) at the suspension arm position and an insulating cushion block (10) between the suspension arms respectively;
the pull rod type upper Mi-shaped confluence frame (1), the pull rod type winding layer (2) and the pull rod type lower Mi-shaped confluence frame (3) are arranged above the pull rod type insulating support (4).
7. A light-weight dry air-core reactor according to claim 5, characterized in that:
the drawstring type winding layer (13) is tensioned and fixed through a weftless binding tape (19), the upper end of the weftless binding tape (19) is fixed on a drawstring type upper suspension arm circular aluminum column (18) at two sides of a suspension arm of the drawstring type upper header manifold frame (12) through a drawstring type upper suspension arm and a winding interlayer insulating cushion block (20), and the lower end is fixed on a drawstring type lower suspension arm oval adjusting aluminum column (22) installed at the later stage at two sides of a suspension arm of the drawstring type lower header manifold frame (14) through a drawstring type lower suspension arm and a winding interlayer insulating cushion block (23);
the drawstring type upper Mi-character manifold frame (12), the drawstring type winding layer (13) and the drawstring type lower Mi-character manifold frame (14) are arranged above the drawstring type insulating support (15).
8. A manufacturing method of a light-weight dry air-core reactor according to any one of claims 1 to 7, characterized in that:
the manufacturing method comprises the following steps:
step 1, directly winding an aluminum stranded wire or a transposed aluminum conductor on a winding mould with a fixed size, and winding a winding layer;
step 2, after winding of each winding layer is finished, the winding layers are integrally compressed by a compression tool directly, and after a compression pressure value reaches a preset value, an inter-boom insulating pull rod (9) or a weftless binding belt (19) is installed to fix each winding layer;
step 3, immersing the winding layers assembled with the pressing tool and the tensioning structure into an insulating paint groove for paint dipping integrally, taking out the winding layers after the paint dipping is finished, and sending the winding layers into a drying furnace for drying and curing;
and 4, conveying the dried and cured winding layer out of the drying furnace, cooling, removing the pressing tool, and finally forming the product after wire heading, coil finishing, coil surface spraying of primer, finish paint and RTV-II ultraviolet-proof paint.
9. A manufacturing method of a light-weight dry type air-core reactor according to claim 8, characterized in that:
in the step 1, glass fiber cloth is paved on the winding clamping fixture to protect the wires, and a wire pressing tool is provided.
10. A manufacturing method of a light-weight dry type air-core reactor according to claim 8, characterized in that:
and 3, after the winding layer is subjected to paint dripping for 0.5 to 1 hour after the paint dipping is finished, sending the winding layer into a drying furnace for drying and curing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116387020A (en) * | 2023-04-27 | 2023-07-04 | 湖北兴屹电气集团有限公司 | Transformer insulating layer forming device and application method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116387020A (en) * | 2023-04-27 | 2023-07-04 | 湖北兴屹电气集团有限公司 | Transformer insulating layer forming device and application method thereof |
| CN116387020B (en) * | 2023-04-27 | 2023-09-19 | 湖北兴屹电气集团有限公司 | Transformer insulating layer forming device and application method thereof |
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