CN115101230A - Aluminum alloy monofilament and light aluminum alloy torsion cable for wind power large base - Google Patents
Aluminum alloy monofilament and light aluminum alloy torsion cable for wind power large base Download PDFInfo
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- CN115101230A CN115101230A CN202210452976.7A CN202210452976A CN115101230A CN 115101230 A CN115101230 A CN 115101230A CN 202210452976 A CN202210452976 A CN 202210452976A CN 115101230 A CN115101230 A CN 115101230A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/186—Sheaths comprising longitudinal lapped non-metallic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention discloses an aluminum alloy monofilament and a light aluminum alloy torsion cable for a wind power large base, wherein the cable comprises a cable core, a wrapping layer, an insulating layer and a sheath layer, wherein the wrapping layer, the insulating layer and the sheath layer are sequentially wrapped outside the cable core, and the cable core comprises a plurality of twisted aluminum alloy monofilamentsThe cable core comprises a plurality of aluminum alloy conductors formed by stranding, wherein the aluminum alloy monofilament comprises the following components in parts by mass: si: 0.04-0.06%, Fe: 0.3 to 0.5%, Cu: 0.15-0.20%, Re: 0.15-0.25%, and the balance of Al and inevitable impurities. The aluminum alloy monofilament has excellent electrical property and high mechanical property, and the tensile strength of the monofilament reaches 121N/mm 2 The elongation of the monofilament reaches 20%, so that the cable has excellent electrical performance and torsion resistance, the traditional torsion-resistant copper cable is replaced, the harsh torsion requirement of a fan on the cable is met, and the cost can be minimized.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an aluminum alloy monofilament and a light aluminum alloy twisted cable for a wind power large base.
Background
As is well known, the carbon emission of the power industry is the highest, and how to use clean energy to replace fossil energy to generate electricity becomes a serious issue. Wind power naturally has the characteristics of no alternatives and feasibility of scale, and is one of main cores in renewable energy sources. It is necessary to expand the consumption rate of non-fossil energy represented by wind power and construct a new power system mainly including new energy.
How to reduce the cable cost on the premise of not reducing the power transmission reliability of the fan is a problem which needs to be confronted by wind power main engine businesses and cable enterprises. The wind power generation cable not only meets the performance of a common cable, but also needs to meet the basic requirements of small bending radius and frequent torsion, so that a torsion-resistant copper cable is basically adopted. Because the tower is actually laid by being divided into the tower torsion section and the bottom fixing section, the following two ways are generally adopted in the prior art: firstly, the top end and the bottom end of the tower cylinder are all connected by using a torsion-resistant copper cable, the cost of the connection mode is extremely high, and meanwhile, the copper cable is inconvenient to transport and lay because of the great weight of the copper cable; and the second method comprises the following steps: the torsion-resistant copper cable is used in the torsion section of the tower barrel, the common aluminum alloy cable is used in the fixing section, the two cables are connected through the connecting pipe in the middle, the cost of the fan is reduced through the connection mode, the connecting pipe in copper-aluminum transition is needed to be installed and laid in the middle, and the safety of the fan in working is reduced while the laying cost is increased.
Disclosure of Invention
The invention aims to provide an aluminum alloy monofilament and a light aluminum alloy twisted cable for a wind power large base aiming at the defects of the prior art, which have the advantages of light weight, convenient transportation, excellent electrical performance and torsion resistance, capability of meeting the harsh twisting requirement of a fan on the cable and minimizing the cost, capability of reducing the manufacturing cost of the fan to the maximum extent on the premise of ensuring the safe and reliable operation of the fan, and higher use value and practical value.
The technical scheme for realizing the aim of the invention is as follows:
the aluminum alloy monofilament comprises the following components in parts by mass: 0.04-0.06%, Fe: 0.3 to 0.5%, Cu: 0.15-0.20%, Re: 0.15-0.25%, and the balance of Al and inevitable impurities.
The utility model provides a wind-powered electricity generation big base is with light-duty aluminum alloy cable that twists reverse, includes the cable core and wraps up in proper order outside the cable core around covering, insulating layer and restrictive coating, the cable core includes the sinle silk that many transposition formed, the sinle silk includes the aluminum alloy conductor that many transposition formed, the aluminum alloy conductor is formed by many aluminum alloy monofilament bundles of claim 1.
Furthermore, the twisting directions of the aluminum alloy monofilament, the aluminum alloy conductor and the wire core are opposite in sequence.
Furthermore, a layer of reinforced non-woven fabric is tightly wrapped outside the aluminum alloy conductor.
Further, the number of the aluminum alloy conductors in each wire core is the same as that of the wire cores in the cable core.
Furthermore, the diameter of the aluminum alloy monofilament is 0.495-0.500 mm.
Further, the stranding pitch of the aluminum alloy monofilament is 24-26D, the stranding pitch of the aluminum alloy conductor is 12-14D, and the stranding pitch of the wire core is 10-12D.
Further, the insulating layer is ethylene propylene rubber insulating.
Further, the sheath layer is an CPE sheath.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the aluminum alloy monofilament has a special material formula, the mechanical strength of the aluminum alloy monofilament can be improved due to the Si and the Cu, and the electrical property of the aluminum alloy monofilament can be reduced with the continuous increase of the content; although the increase of Fe content can improve the elongation of the monofilament, the electrical property of the aluminum alloy monofilament is reduced; the increase of Re content can improve the conductivity of the monofilament on the premise of not influencing the strength of the monofilament, but with the continuous increase of Re content, a large amount of rare earth compounds are formed in an aluminum alloy melt, lattice distortion and crystal boundary defects are caused, the structural performance of aluminum and aluminum alloy is seriously influenced, meanwhile, the cost is increased, in addition, the excessive Re has the function of competing for Fe and Si, the amount of rare earth compounds or impurities is increased, and the excessive Re is distributed along the crystal boundary, so that the second phase strengthening tendency is increased, and the plasticity of the aluminum alloy monofilament is reduced. The invention comprehensively considers the effects of various components, develops a brand new formula, ensures that the aluminum alloy monofilament has excellent electrical property and higher mechanical property, and ensures that the tensile strength of the monofilament reaches 121N/mm 2 The elongation of the monofilament reaches 20 percent.
(2) The cable is made of the aluminum alloy conductor twisted by the aluminum alloy single wire bundles with the special formula, is light in weight and convenient to transport compared with the traditional copper torsion-resistant cable, has excellent electrical performance and torsion-resistant characteristic, meets the harsh torsion requirement of a fan on the cable, can minimize the cost, greatly reduces the manufacturing cost of the fan on the premise of ensuring the safe and reliable operation of the fan, and has higher use value and practical value.
(3) The twisting directions of the aluminum alloy monofilament, the aluminum alloy conductor and the wire core of the cable are sequentially opposite, and the twisting mode of the cable is different from that of a conventional five-type copper conductor cable, and the twisting in the positive and negative directions is realized once, so that the twisting resistance of the cable is further improved.
(4) The reinforced non-woven fabric layer is tightly wrapped outside the aluminum alloy conductor of the cable, so that deformation and wire breakage caused by mutual extrusion of adjacent aluminum alloy conductors in the twisting process can be effectively prevented.
(5) The number of the aluminum alloy conductors of the cable is the same as that of the wire cores in the cable core, the normal twisted structure of the conductors 1+6 is guaranteed, and the stability of the conductors in the twisting process is improved.
(6) The diameter of the aluminum alloy monofilament is 0.495-0.500 mm, and the aluminum alloy monofilament belongs to five types of aluminum alloy soft conductors, so that the cable is lighter and more economic and optimal.
(7) The invention limits the stranding pitch of the aluminum alloy monofilament, the aluminum alloy conductor and the wire core, and increases the strength and the structural compactness of the plied yarn.
(8) The insulating layer is ethylene propylene rubber insulation, and has excellent electrical insulation property and good ozone resistance, moisture resistance, heat resistance, cold resistance and aging resistance.
(9) The sheath layer is a CPE sheath, has excellent weather resistance, cold resistance, flame retardance and salt spray resistance, and meets the use requirements of the wind power generation cable.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural view of the present invention; .
The reference numbers in the drawings are:
the cable comprises a cable core 1, aluminum alloy conductors 1-1-1, a wrapping layer 2, an insulating layer 3 and a sheath layer 4.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
(example 1)
The light aluminum alloy torsion cable for the wind power big base shown in figure 1 comprises a cable core 1, a wrapping layer 2, an insulating layer 3 and a sheath layer 4, wherein the wrapping layer 2, the insulating layer 3 and the sheath layer 4 are sequentially wrapped outside the cable core 1, the cable core 1 comprises 7 twisted wire cores 1-1, the wire cores 1-1 comprise 7 twisted aluminum alloy conductors 1-1-1, the aluminum alloy conductors are formed by twisting a plurality of aluminum alloy monofilament bundles, wherein the aluminum alloy monofilaments have a special material formula, and the composition and the proportion of the aluminum alloy monofilaments are as follows, in parts by mass, Si: 0.04-0.06%, Fe: 0.3 to 0.5%, Cu: 0.15-0.20%, Re: 0.15-0.25%, and the balance of Al and inevitable impurities. The mechanical strength of the aluminum alloy monofilament can be improved due to the Si and the Cu, but the electrical property of the aluminum alloy monofilament can be reduced with the continuous increase of the content; the increase of Fe content can improve the elongation of the monofilament, but also can reduce the electrical property of the aluminum alloy monofilament; the increase of Re content can improve the conductivity of the monofilament on the premise of not influencing the strength of the monofilament, but with the continuous increase of Re content, a large amount of rare earth compounds are formed in an aluminum alloy melt, lattice distortion and crystal boundary defects are caused, the structure performance of aluminum and aluminum alloy is seriously influenced, meanwhile, the cost is increased, in addition, the excessive Re has the function of competing for Fe and Si, the quantity of rare earth compounds or impurities is increased, the rare earth compounds or impurities are distributed along the crystal boundary, the second phase strengthening tendency is increased, and the plasticity of the aluminum alloy monofilament is reduced. In the embodiment, the effects of various components are comprehensively considered, and a brand new formula is developed, so that the aluminum alloy monofilament has excellent electrical property and high mechanical property, and the tensile strength of the monofilament reaches 128N/mm 2 The elongation of the monofilament was 21%, and the direct current resistivity at 20 ℃ was 0.026381.
Specifically, a plurality of aluminum alloy monofilaments with the diameter of 0.495-0.500 mm are adopted to be twisted leftwards according to the pitch of 24-26D to form an aluminum alloy conductor 1-1 with the diameter of 3.60mm, a layer of reinforced non-woven fabric is tightly wrapped outside the aluminum alloy conductor 1-1, and deformation and wire breakage caused by mutual extrusion of the adjacent aluminum alloy conductors 1-1 in the twisting process are effectively prevented. The 7 aluminum alloy conductors 1-1-1 are regularly twisted rightwards to form a wire core 1-1 according to a 1+6 arrangement structure and the pitch is 12-14D, finally the 7 wire cores 1-1 are also regularly twisted leftwards according to the 1+6 arrangement structure, the pitch is 10-12D to form a cable core 1, a reinforced non-woven fabric layer is tightly wrapped outside the cable core to serve as a wrapping layer 2, and the structure is more compact while the rubber material of the insulating layer is prevented from permeating into the cable core 1. And finally, sequentially extruding an ethylene propylene rubber insulation layer and a CPE sheath outside the wrapping layer 2 to prepare an insulation layer 3 and a sheath layer 4, wherein the ethylene propylene rubber insulation layer has excellent electrical insulation property and good ozone resistance, moisture resistance, heat resistance, cold resistance and aging resistance, and the CPE sheath has excellent weather resistance, cold resistance, flame retardance and salt mist resistance, so that the electric property of the cable is ensured, and the wind machine can effectively operate under various severe wind conditions.
Comparative example 1
The aluminum alloy monofilament of comparative example 1 comprises the following components in parts by mass: 0.02 to 0.04%, Fe: 0.5 to 0.6%, Cu: 0.20 to 0.25%, Re: 0.25 to 0.3 percent, the balance of Al and inevitable impurities, and the tensile strength of the monofilament is 110N/mm 2 The elongation of the monofilament was 23%, and the direct current resistivity at 20 ℃ was 0.027882.
Comparative example 2
The aluminum alloy monofilament of comparative example 2 comprises the following components in parts by mass: 0.06-0.08%, Fe: 0.6 to 0.7%, Cu: 0.25-0.3%, Re: 0.01-0.15%, the balance of Al and inevitable impurities, and the tensile strength of the monofilament is 140N/mm 2 The elongation of the monofilament is 25%, the direct current resistivity at 20 ℃ is 0.029107, the resistivity is unqualified and does not meet the standard which is less than or equal to 0.028264.
(comparative example 3)
Comparative example 3 adopts an aluminum alloy monofilament with the same composition and ratio as those in example 1, the difference is that the cable core 1 in the cable structure is different, and in this example, 61 strands of aluminum alloy monofilaments are stranded once to form a cable core.
Comparative example 4
Comparative example 4 adopts an aluminum alloy monofilament with the same composition and ratio as in example 1, except that the aluminum alloy monofilament, the aluminum alloy conductor 1-1-1 and the core 1-1 in the cable structure have the same stranding direction.
Comparative example 5
Comparative example 5 adopts an aluminum alloy monofilament with the same composition and proportion as those of example 1, except that a layer of reinforced non-woven fabric is not wrapped outside the aluminum alloy conductor 1-1-1 in the cable structure.
Comparative example 6
Comparative example 6 employs the same structure as example 1 except that the composition of the aluminum alloy monofilament is the same as comparative example 1.
Comparative example 7
Comparative example 7 employs the same structure as example 1 except that the composition of the aluminum alloy monofilament is the same as comparative example 2.
Example 1, comparative example 3, comparative example 4 and comparative example 5 were subjected to torsion tests under the same conditions, and the results are shown in the following table:
the cable is different from the twisting mode of five conventional copper conductor cables, the twisting directions of the aluminum alloy monofilament, the aluminum alloy conductor 1-1-1 and the wire core 1-1 are sequentially opposite, the positive and negative twice twisting is realized, the number and the arrangement structure of the wire cores 1-1 in the cable core 1 are the same as those of the aluminum alloy conductor 1-1-1 in each wire core 1-1, and a layer of reinforced non-woven fabric is tightly wrapped outside the aluminum alloy conductor 1-1-1, so that the wire breakage rate of the manufactured cable is less than or equal to 1 percent after normal-temperature twisting and low-temperature twisting, the cost is reduced by about 40-50 percent compared with the copper cable, the weight is reduced by about 30 percent, the transmission loss is reduced by more than 10%, the harsh torsion requirement of the fan on the cable can be met, the cost can be minimized, the manufacturing cost of the fan is reduced to the maximum extent on the premise of ensuring the safe and reliable operation of the fan, and the fan has high use value and practical value.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The aluminum alloy monofilament is characterized by comprising the following components in parts by mass: si: 0.04-0.06%, Fe: 0.3 to 0.5%, Cu: 0.15-0.20%, Re: 0.15-0.25%, and the balance of Al and inevitable impurities.
2. The utility model provides a wind-powered electricity generation big base is with light-duty aluminum alloy cable that twists reverse which characterized in that: including cable core (1) and wrap up in proper order outside cable core (1) around covering (2), insulating layer (3) and restrictive coating (4), cable core (1) includes sinle silk (1-1) that many transposition formed, sinle silk (1-1) includes aluminum alloy conductor (1-1-1) that many transposition formed, aluminum alloy conductor (1-1-1) is formed by many aluminium alloy monofilament bundles hank as claim 1.
3. The light aluminum alloy twisted cable for the wind power large base as claimed in claim 2, wherein: the twisting directions of the aluminum alloy monofilament, the aluminum alloy conductor (1-1-1) and the wire core (1-1) are opposite in sequence.
4. The light aluminum alloy twisted cable for the wind power large base as claimed in claim 2, wherein: a layer of reinforced non-woven fabric is tightly wrapped outside the aluminum alloy conductor (1-1-1).
5. The light aluminum alloy twisted cable for wind power large bases as claimed in claim 2, wherein: the number of the aluminum alloy conductors (1-1-1) in each wire core is the same as that of the wire cores (1-1) in the cable core (1).
6. The light aluminum alloy twisted cable for wind power large bases as claimed in claim 2, wherein: the diameter of the aluminum alloy monofilament is 0.495-0.500 mm.
7. The light aluminum alloy twisted cable for wind power large bases as claimed in claim 2, wherein: the stranding pitch of the aluminum alloy single wire is 24-26D, the stranding pitch of the aluminum alloy conductor (1-1) is 12-14D, and the stranding pitch of the wire core (1-1) is 10-12D.
8. The light aluminum alloy twisted cable for wind power large bases as claimed in claim 2, wherein: the insulating layer (3) is made of ethylene propylene rubber.
9. The light aluminum alloy twisted cable for wind power large bases as claimed in claim 2, wherein: the sheath layer (4) is a CPE sheath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210452976.7A CN115101230A (en) | 2022-04-27 | 2022-04-27 | Aluminum alloy monofilament and light aluminum alloy torsion cable for wind power large base |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117410006A (en) * | 2023-07-10 | 2024-01-16 | 特变电工山东鲁能泰山电缆有限公司 | Aluminum alloy rod for cable, aluminum alloy flexible cable for offshore wind power generation and production process of aluminum alloy flexible cable |
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2022
- 2022-04-27 CN CN202210452976.7A patent/CN115101230A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117410006A (en) * | 2023-07-10 | 2024-01-16 | 特变电工山东鲁能泰山电缆有限公司 | Aluminum alloy rod for cable, aluminum alloy flexible cable for offshore wind power generation and production process of aluminum alloy flexible cable |
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