CN116072335A - Torsion-resistant cable for wind driven generator and production process - Google Patents

Torsion-resistant cable for wind driven generator and production process Download PDF

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Publication number
CN116072335A
CN116072335A CN202310281867.8A CN202310281867A CN116072335A CN 116072335 A CN116072335 A CN 116072335A CN 202310281867 A CN202310281867 A CN 202310281867A CN 116072335 A CN116072335 A CN 116072335A
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Prior art keywords
cable
sub
cables
layer
torsion
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CN202310281867.8A
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CN116072335B (en
Inventor
谢钟铮
任彦峰
娄永超
帅平跃
秦瑞攀
徐小军
万吴剑
楼斌
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Zhejiang Tianjie Industrial Corp
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Zhejiang Tianjie Industrial Corp
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Flexible Shafts (AREA)

Abstract

The application discloses a torsion-resistant cable for a wind driven generator and a production process thereof.A polymer center shaft is arranged at the axis of the torsion-resistant cable, the diameter of a first sub-cable is 0.5 to 1.2 times that of the polymer center shaft, and the spacing between the center shafts of adjacent first sub-cables in the circumferential direction of the polymer center shaft is 1.05 to 1.2 times that of the first sub-cable so as to form a first gap; according to the torsion-resistant cable for the wind driven generator and the production process, the polymer center shaft plays a supporting role and provides a deformation function, and deformation generated by tightening the first sub-cable is absorbed by compression deformation of the polymer center shaft; the first sub-cables are not abutted against each other in the twisting process, but have a first gap, so that when the torsion-resistant cable is twisted, the deformation generated by the loosening of the first sub-cables is accommodated in the first gap; the limitation of the distance between the specific adjacent first sub-cables provides a space for accommodating deformation, and the first sub-cables cannot generate excessive space to cause abnormal positions.

Description

Torsion-resistant cable for wind driven generator and production process
Technical Field
The invention relates to the field of cable structures, in particular to a torsion-resistant cable for a wind driven generator and a production process.
Background
The cable has wider application in various scenes, and can realize the transmission of control signals or monitoring signals and the like. Under the condition of more transmission paths, a plurality of sub-cables can be assembled in a single cable, so that the application efficiency of the cable is improved. In the use process of the wind driven generator, the related paths of sensing and control signals are complicated, and the cables are required to be arranged in a torsion-resistant manner. In the wind driven generator, the torsion-resistant cable is twisted at a certain angle, when the wind direction changes, the windward side of the fan blade of the wind driven generator can rotate along with the control cable installed in the wind driven generator when the windward side of the fan blade of the wind driven generator is adjusted along with the change of the wind direction, and the middle part of the cable can be subjected to torsion force due to the fact that the two ends of the cable are fixed, and the problem that the conventional structural cable is broken and not electrified after the conventional structural cable runs for a period of time can occur.
From the calculation formula of the length of the single-turn helix, the larger the pitch of the helix (twisting pitch), the larger the deformation that occurs to the sub-cables in the torsion-resistant cable. For example, the sub-cables are twisted around a core of diameter A, and the sub-cables have a pitch S, and during this process the sub-cables are twisted one turn with a length L ((pi A) 2 +S 2 ) 1/2 The method comprises the steps of carrying out a first treatment on the surface of the The larger the pitch, the proportion of deformation during torsion of the torsion-resistant cableThe larger. Such as the center of the patent CN113555148A, a filling block is arranged, so that the damage caused by arranging the cable core at the position is avoided; and set up the middle tensile and resistant unit of turning round in the cable length direction, above structure is comparatively complicated, and processing is complicated, and is not good to the cushioning effect of each sub-cable in the cable.
Disclosure of Invention
The invention mainly aims to provide an anti-torsion cable for a wind driven generator and a production process, and aims to solve the problems that the existing anti-torsion arrangement is complex in structure and inconvenient to process, and the buffer effect of each sub-cable in the cable is poor.
In order to achieve the above object, the present invention provides a torsion-resistant cable for a wind turbine, comprising:
the polymer center shaft is arranged at the axis of the torsion-resistant cable;
a first cable layer including a plurality of first sub-cables twisted around the central axis of the polymer, the first cable layer having a twisting pitch of thirty to fifty times a diameter of the central axis of the polymer, the first sub-cables having a diameter of 0.5 to 1.2 times a diameter of the central axis of the polymer, and a first gap being formed between central axes of adjacent first sub-cables in a circumferential direction of the central axis of the polymer at a distance of 1.05 to 1.2 times a diameter of the first sub-cables;
the first shielding layer is arranged on the periphery of the first stranded cable layer;
and the outer protective sleeve layer is arranged on the periphery of the first shielding layer.
Further, the twisting pitch of the first cable layer is forty to fifty times of the diameter of the central axis of the polymer, the number of the first sub-cables is six to eight, the first sub-cables are further matched between the central axis of the polymer and the first sub-cables, the first sub-cables are provided with first dividing strips which are consistent with the twisting trend of the first sub-cables, the central axis of the polymer is fully wrapped in the circumferential direction by all the first dividing strips, the adjacent first dividing strips are mutually propped against each other in the circumferential direction of the torsion-resistant cable, a first groove is formed in the surface of the first dividing strip corresponding to the first sub-cables in the length direction of the first dividing strips, and the central angle corresponding to the wrapping range of the first groove in the circumferential direction of the first sub-cables is 60 to 80 degrees, wherein the free end position of the first dividing strips far away from the central axis of the polymer is lower than the central axis of the first sub-cables.
Further, the inner diameter of the first groove is 0.8 to 0.9 times of the outer diameter of the first sub-cable.
Further, the first separation strip is made of foaming materials.
Further, the torsion-resistant cable further comprises a second stranded cable layer, the second stranded cable layer comprises a plurality of second sub-cables stranded around the first stranded cable layer, and second gaps are formed in the circumferential direction of the torsion-resistant cable adjacent to the second sub-cables.
Further, an intermediate protective sleeve layer or a belting layer is separated between the first stranded cable layer and the second stranded cable layer.
Further, the first stranded cable layer and the second stranded cable layer are in the same cabling direction, and the twisting pitch of the second stranded cable layer is 1.2 to 2.0 times that of the first stranded cable layer.
Further, the polymer center shaft is made of foaming materials.
Further, an inner protective sleeve layer is further arranged on the inner periphery of the first shielding layer.
The invention also provides a production process of the torsion-resistant cable for the wind driven generator, which is applied to the torsion-resistant cable for the wind driven generator and comprises the following steps:
s1, arranging the first sub-cable and the first separation strip in a cable forming device in pairs;
s2, twisting a plurality of groups of paired first sub-cables and the first separation strips in the polymer center shaft through a cabling machine;
s3, machining the first shielding layer on the periphery of the first stranded cable layer;
s4, extruding the outer protective sleeve layer on the periphery of the first shielding layer.
According to the torsion-resistant cable for the wind driven generator and the production process, the polymer center shaft plays a supporting role and provides a deformation function, and deformation generated by tightening the first sub-cable is absorbed by compression deformation of the polymer center shaft; the first sub-cables are not abutted against each other in the twisting process, but have a first gap, so that when the torsion-resistant cable is twisted, the deformation generated by the loosening of the first sub-cables is accommodated in the first gap; the limitation of the distance between the specific adjacent first sub-cables provides a space for accommodating deformation, and the first sub-cables cannot generate excessive space to cause abnormal positions.
Drawings
FIG. 1 is a schematic view of a torsion cable for a wind turbine according to a first embodiment of the present invention;
FIG. 2 is a schematic view showing the adaptation of a first sub-cable of a torsion cable for a wind turbine to a central axis of a polymer according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a torsion cable for a wind turbine according to a second embodiment of the present invention;
FIG. 4 is a schematic view of torsion cables for a wind turbine according to a third embodiment of the present invention;
FIG. 5 is a schematic view of a third embodiment of the torsion cable for a wind turbine according to the present invention, wherein the first sub-cable and the first spacer are adapted to the polymer center shaft.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, units, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1 to 5, in an embodiment of the present invention, a torsion cable for a wind power generator includes:
a polymer central shaft 100 disposed in the axial center of the torsion-resistant cable;
a first cable layer 200 including a plurality of first sub-cables 210 twisted around the polymer central axis 100, the first cable layer 200 having a twisting pitch of thirty to fifty times the diameter of the polymer central axis 100, the first sub-cables 210 having a diameter of 0.5 to 1.2 times the diameter of the polymer central axis 100, and a first gap 220 formed between central axes of adjacent first sub-cables 210 in the circumferential direction of the polymer central axis 100 at a pitch of 1.05 to 1.2 times the diameter of the first sub-cables 210;
a first shielding layer 300 disposed on the outer circumference of the first cable layer 200;
an outer protective layer 400 is disposed on the outer periphery of the first shielding layer 300.
In the prior art, when the windward side of a fan blade of a wind driven generator is adjusted along with the change of the wind direction, a control cable arranged in the wind driven generator can rotate along with the windward side, and as the two ends of the cable are fixed, the middle part of the cable can be subjected to torsion force, and the cable with a conventional structure can break and not be electrified after running for a period of time; then, according to the calculation formula of the length of the single-coil spiral line, when the pitch of the spiral line (twisting pitch) is larger, the deformation of the sub-cables in the torsion-resistant cable is larger, and the current torsion-resistant arrangement has the problems of complex structure, inconvenient processing and poor buffering effect on each sub-cable in the cable.
In the present invention, since the buffering cannot be performed at the axial center, the polymer central shaft 100 is disposed at the axial center of the torsion-resistant cable without providing a cable core for power or signal transmission, and the polymer central shaft 100 plays a supporting role, and provides a deforming function when the first cable layer 200 is contracted inward. When the distance between two adjacent first sub-cables 210 in the first cable layer 200 is 1 time the diameter of the first sub-cable 210, the two first sub-cables 210 are propped against each other, and the distance between the two first sub-cables is set to be 1.05 to 1.2 times the diameter of the first sub-cable 210, so that a first gap 220 can be formed; the above limitation of the size provides a space for accommodating the deformation, and the first sub-cable 210 may not be positioned abnormally without forming an excessive space. The first sub-cables 210 do not abut against each other during twisting, but have a first gap 220, so that when the torsion-resistant cable is twisted, the deformation generated by tightening the first sub-cables 210 is absorbed by the compression deformation of the polymer central shaft 100; the deformation of the first sub-cable 210 due to the slackening becomes accommodated in the first gap 220. The possibility of accidental damage to the first sub-cable 210 is reduced when the torsion-resistant cable is twisted. The outermost layer of the first sub-cable 210 is a first sub-cable insulation, and if the first sub-cable insulation is made of a foam material, a buffering effect can be provided, but the dielectric performance is reduced. The twist pitch of the first cable layer 200 is thirty to fifty times the diameter of the polymer central axis 100, and the above relationship of the twist pitch to the diameter of the polymer central axis 100 is advantageous for the twisting process of the first sub-cable 210. The diameter of the first sub-cable 210 is 0.5 to 1.2 times the diameter of the polymer central shaft 100, which is advantageous for the arrangement of the first sub-cable 210 around the polymer central shaft 100. The first shielding layer 300 is used to provide a shielding effect and the outer protective sheath layer 400 is used to provide a securing and protective effect.
In this embodiment, the conductor of the first sub-cable 210 is a 5 th copper conductor or a tin-plated copper conductor, and the insulation thereof is cold-resistant PVC, so as to meet the requirements of the low-temperature running environment of the wind farm in winter. The diameter of the polymer central shaft 100 is 2.9 to 3.0mm; the number of the first sub-cables 210 is 6; the diameter of the first sub-cable 210 is 2.3±0.1mm; the average thickness of the insulation of the first sub-cable is 0.6mm, and the material is cold-resistant PVC. The twisting pitch of the first cable layer 200 is 110 to 120mm millimeters. The first shielding layer 300 is disposed on the outer periphery of the first cable layer 200, and specifically is woven with more than 80% of tin-plated copper, so as to maintain anti-interference performance. The outer protective sleeve layer 400 is made of cold-resistant PVC or other low-temperature-resistant materials so as to meet the requirements of the winter low-temperature operation environment of the wind field. The following performance requirements are met; conductor resistance: 26.ltoreq.0 Ω/km (20 ℃); voltage test:
3.0kV/5min, no breakdown; normal temperature torsion test: more than 10000 times, no short circuit and no open circuit.
In summary, the polymer central shaft 100 provides a deformation function while supporting, and the deformation generated by tightening the first sub-cable 210 is absorbed by the compression deformation of the polymer central shaft 100; the first sub-cables 210 do not abut against each other during twisting, but have a first gap 220, so that when the torsion-resistant cable is twisted, the deformation generated by the loosening of the first sub-cables 210 is accommodated in the first gap 220; the limitation of the distance between the specific adjacent first sub-cables 210 provides a space for accommodating deformation, and the first sub-cables 210 are not formed into an excessive space so that the position of the first sub-cables 210 is abnormal.
Referring to fig. 4 to 5, in one embodiment, the twisting pitch of the first twisted cable layer 200 is forty to fifty times the diameter of the polymer central shaft 100, the number of the first sub-cables 210 is six to eight, the polymer central shaft 100 and the first sub-cables 210 are further matched, the first sub-cables 210 are provided with first separation strips 500 consistent with the twisting trend of the first sub-cables 210, all the first separation strips 500 completely wrap the polymer central shaft 100 in the circumferential direction, adjacent first separation strips 500 are mutually propped against each other in the circumferential direction of the torsion cables, a first groove 510 is arranged on the surface of the first separation strip 500 corresponding to the first sub-cables 210 in the length direction, and the central angle corresponding to the wrapping range of the first groove 510 in the circumferential direction of the first sub-cables 210 is 60 to 80 degrees, wherein the free end position of the first separation strips 500 far from the central shaft of the polymer 100 is lower than the central shaft of the first sub-cables 210.
In this embodiment, the height of the first separator 500 is lower, so that the first gap 220 is not filled, and the function of the first gap 220 is maintained. The first separator bar 500 provides both a centripetal and circumferential cushioning effect for the first sub-cable 210. The size and shape of the first separator bar 500 should be specifically designed according to the actual use scenario. The first separation strip 500 acts such that the first gap 220 between the first sub-cables 210 is ensured and the first separation strip 500 is deformed together during torsion of the torsion cable, whereby a certain guiding restriction is formed for the first sub-cables 210 always through the first groove 510. It should be noted that the technical solution of this embodiment is suitable for the case that the diameter of the central axis 100 of the polymer is larger, for example, the diameter of the central axis 100 of the polymer is larger than 10 mm. In the process of cabling a plurality of sub-cables, a frame winch or a small-sized cabling machine can be selected according to the diameters and hardness of the sub-cables, but no matter which equipment is used for cabling, the cable winch basically comprises a large-diameter pay-off reel and a small-diameter wire guide reel which are fixedly connected to rotate together, the pay-off reel is used for paying off, and the wire guide reel is very close to a cable core in size, so that the twisting process of the sub-cables is guided at a position closer to the cable core. In this embodiment, since the first sub-cable 210 and the first separation strip 500 are to be formed at positions corresponding to each other, the size and the position of the wire pad need to be adaptively adjusted to obtain a better combination effect of the first sub-cable 210 and the first separation strip 500.
In one embodiment, the inner diameter of the first groove 510 is 0.8 to 0.9 times the outer diameter of the first sub-cable 210.
The first separation bar 500 does not completely fit the first sub-cable 210 while supporting the first sub-cable 210, and the difference of the curvature radius forms a gap, so that the gap can provide a space during the tightening process of the first sub-cable 210 without necessarily adopting the deformation of the central polymer shaft 100.
In one embodiment, the first separator bar 500 is a foam material.
In this embodiment, similar to the polymer bottom bracket 100 in the previous embodiment, the first separation strip 500 is made of foam material, so that the first separation strip 500 itself can perform a buffering function during the tightening process of the first sub-cable 210. The above characteristics of the foamed material provide better flexibility and are also advantageous in the process of twisting into a cable.
Referring to fig. 3, in one embodiment, the torsion cable further includes a second cable layer 600, the second cable layer 600 including a plurality of second sub-cables 610 stranded around the first cable layer 200, and a second gap 620 is formed adjacent to the second sub-cables 610 in the torsion cable circumferential direction.
As in the previous embodiment, in this embodiment, the second sub-cables 610 also do not abut against each other during twisting, but have the second gaps 620, so that when the torsion-resistant cable is twisted, the deformation generated by tightening the second sub-cables 610 is also absorbed by the compression deformation of the polymer bottom bracket 100; the deformation of the second sub-cable 610 due to the slackening becomes accommodated in the second gap 620. The possibility of accidental damage to the second sub-cable 610 is reduced when the torsion-resistant cable is twisted. The diameter of the second sub-cable 610 is 2.3±0.1mm. Because of the presence of the first separator bar 500 and the polymer bottom bracket 100, in this embodiment, the second separator bar may not be provided for the second sub-cable 610, and the second sub-cable 610 may be provided with centripetal buffering by using the existing structure, and the second gap 620 may be provided with circumferential buffering. Of course, in order to obtain a better buffering effect for the second sub-cable 610, the first sub-cable may be similar to the first sub-cable 500, and the second sub-cable 610 may be matched with the second sub-cable; however, the bonding process of the second division bar is difficult due to the irregularity of the outer shape, and it is preferable to provide an intermediate protective cover layer on the outer circumference of the first cable layer 200, thereby normalizing the outer shape to facilitate the bonding process of the second division bar.
Referring to fig. 4, in one embodiment, the first and second strand layers 200, 600 are separated by an intermediate protective jacket or tape layer 700.
When the torsion-resistant cable is twisted, the possible presence of the second sub-cable 610 trapped in the first gap 220 may cause the first gap 220 to be completely or partially filled, and the effect of the first gap 220 may be lost; the same first sub-cable 210 may also intrude into the second gap 620. In this embodiment, under the action of the middle protective cover layer, the possibility of abnormal positions of the first sub-cable 210 and the second sub-cable 610 during and after cabling is reduced. In the case of the tape layer, the process can be conveniently interposed between the processes of one and the second lay layer 600.
In one embodiment, the first and second strand layers 200 and 600 are in the same cabling direction, and the second strand layer 600 has a twist pitch that is 1.2 to 2.0 times the twist pitch of the first strand layer 200.
If the first cable layer 200 and the second cable layer 600 are disposed in opposite cable forming directions as in the prior art, if the cable forming direction of the first cable layer 200 is clockwise and the cable forming direction of the second cable layer 600 is counterclockwise, the first cable layer 200 and the second cable layer 600 shrink and relax respectively when the torsion-resistant cable is twisted, the interaction is promoted, and the situation of good insulation and damaged conductor is easily generated. In the present embodiment, however, the cabling directions are consistent, the interaction is weakened, and the possibility of damage to the conductors is reduced. The disadvantage of the increased deformation caused by the same cable direction is overcome by other features in the invention.
In this embodiment, the twisting pitches of the first cable layer 200 and the second cable layer 600 are different, so that the combination stability of the two layers is improved, and the possibility of abnormal alignment is reduced. The larger the twisting pitch, the larger the size of the deformation generated when the torsion-resistant cable is twisted, and since the second cable layer 600 is provided at the outer layer, it has a larger buffer range than the first cable layer 200, and thus it is advantageous to raise the twisting pitch of the first cable layer 200. In this embodiment, the twisting pitch of the first cable layer 200 is 110 to 120mm and the twisting pitch of the second cable layer 600 is 180 to 190 mm.
In one embodiment, the outer wall of the polymer bottom bracket 100 is provided with a plurality of grooves along its length in the circumferential direction.
In this embodiment, torsional deformations of the polymer shaft 100 are absorbed by the grooves described above. The number of grooves is 8 and evenly spaced 45 degrees around the polymer central axis 100. The above grooves may be synchronized during the extrusion process of the polymer shaft 100. The cross section of the groove can be rectangular or semicircular, and the characteristic dimension of the groove is 0.1 to 0.3 times of the diameter of the shaft 100 in the polymer.
In one embodiment, the polymeric central shaft 100 is a foam material.
In the foregoing embodiment, the central axis of the torsion cable for wind power generator is a polymer central axis 100, and the flexibility of the polymer central axis 100 is used to improve the overall torsion resistance of the torsion cable. In this embodiment, the flexibility is further enhanced by introducing foaming properties into the polymer central shaft 100.
In one embodiment, the inner circumference of the first shielding layer 300 is further provided with an inner protective sheath layer.
In this embodiment, the inner protective layer is made of cold-resistant PVC, and uses its elasticity to buffer the acting force of the first shielding layer 300 on the first sub-cable 210 during torsion, so as to protect the insulated wire core. It should be noted that the inner protective layer is not limited to directly contact with the first cable layer 200 to generate the buffering effect, and the direct contact may actually affect the deformation of the first sub-cable 210, and preferably the first tape layer should be disposed between the inner protective layer and the first cable layer 200.
The invention also provides a production process of the torsion-resistant cable for the wind driven generator, which is applied to the torsion-resistant cable for the wind driven generator and comprises the following steps:
s1, arranging the first sub-cable 210 and the first separation strip 500 in pairs in a cabling device;
s2, twisting a plurality of pairs of the first sub-cables 210 and the first separation strips 500 on the polymer central shaft 100 through a cabling machine;
s3, machining the first shielding layer 300 on the periphery of the first cable layer 200;
s4, extruding the outer protective sleeve layer 400 on the periphery of the first shielding layer 300.
In steps S1 and S2 of this embodiment, the first sub-cable 210 and the first separation strip 500 are disposed in pairs on the storage portion of the cabling device, and are attached to the central polymer shaft 100 after being lapped on the winch portion, and the closer the first sub-cable 210 and the first separation strip 500 are led out from the winch portion to the central polymer shaft 100, the better the co-twisting effect of the first sub-cable 210 and the first separation strip 500.
The processing manner of the first shielding layer 300 in step S3 may be wrapping or braiding, and the specific materials, the processing manner, and the like are determined according to actual designs.
The material, thickness, etc. of the extrusion in S4 are determined according to practical design.
In summary, according to the torsion-resistant cable for wind turbine and the production process thereof provided by the present invention, the polymer center shaft 100 supports and provides the deformation function, and the deformation generated by tightening the first sub-cable 210 is absorbed by the compression deformation of the polymer center shaft 100; the first sub-cables 210 do not abut against each other during twisting, but have a first gap 220, so that when the torsion-resistant cable is twisted, the deformation generated by the loosening of the first sub-cables 210 is accommodated in the first gap 220; the limitation of the distance between the specific adjacent first sub-cables 210 provides a space for accommodating deformation, and the first sub-cables 210 are not formed into an excessive space so that the position of the first sub-cables 210 is abnormal.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.

Claims (10)

1. A torsion resistant cable for a wind turbine, comprising:
a polymer central shaft (100) arranged at the axle center of the torsion-resistant cable;
a first cable layer (200) including a plurality of first sub-cables (210) twisted around the polymer central axis (100), the first cable layer (200) having a twisting pitch of thirty to fifty times the diameter of the polymer central axis (100), the first sub-cables (210) having a diameter of 0.5 to 1.2 times the diameter of the polymer central axis (100), and a first gap (220) formed between central axes of adjacent first sub-cables (210) in the circumferential direction of the polymer central axis (100) having a pitch of 1.05 to 1.2 times the diameter of the first sub-cables (210);
a first shielding layer (300) provided on the outer periphery of the first cable layer (200);
and an outer protective sheath layer (400) provided on the outer periphery of the first shield layer (300).
2. The torsion-resistant cable for wind turbines according to claim 1, wherein the twisting pitch of the first twisted cable layer (200) is forty to fifty times the diameter of the polymer central shaft (100), the number of the first sub-cables (210) is six to eight, the polymer central shaft (100) and the first sub-cables (210) are further matched, the first sub-cables (210) are provided with first separation strips (500) consistent with the twisting trend of the first sub-cables (210), all the first separation strips (500) completely wrap the polymer central shaft (100) in the circumferential direction, the adjacent first separation strips (500) mutually support in the circumferential direction of the torsion-resistant cable, first grooves (510) are arranged on the surface of the first sub-cables (210) in the length direction, the first grooves (510) wrap the central shaft (100) at 60 to 80 degrees in the circumferential direction of the first sub-cables (210), and the center shafts are far away from the first free ends (210) of the first sub-cables (210).
3. The torsion cable for a wind turbine according to claim 2, wherein the first groove (510) has an inner diameter of 0.8 to 0.9 times an outer diameter of the first sub-cable (210).
4. The torsion cable for a wind turbine according to claim 2, wherein the first separator strip (500) is a foamed material.
5. The torsion cable for a wind turbine according to claim 2, further comprising a second lay layer (600), the second lay layer (600) comprising a plurality of second sub-cables (610) stranded around the first lay layer (200), adjacent to the second sub-cables (610) forming a second gap (620) in the circumferential direction of the torsion cable.
6. The torsion cable for a wind turbine according to claim 5, wherein the first and second lay layers (200, 600) are separated by an intermediate protective jacket layer or tape layer (700).
7. The torsion-resistant cable for wind turbine according to claim 5, wherein the first lay-cable layer (200) is aligned with the cabling direction of the second lay-cable layer (600), and the lay-cable pitch of the second lay-cable layer (600) is 1.2 to 2.0 times the lay-cable pitch of the first lay-cable layer (200).
8. The torsion cable for a wind turbine according to any one of claims 1 to 7, wherein the polymer central shaft (100) is a foamed material.
9. The torsion cable for a wind turbine according to any one of claims 1 to 7, wherein an inner circumference of the first shielding layer (300) is further provided with an inner protective sheath layer.
10. A production process of a torsion-resistant cable for a wind power generator, which is applied to the torsion-resistant cable for a wind power generator as claimed in claim 2, characterized by comprising:
s1, arranging the first sub-cable (210) and the first separation strip (500) in pairs in a cabling device;
s2, twisting a plurality of pairs of the first sub-cables (210) and the first separation strips (500) on the polymer center shaft (100) through a cabling machine;
s3, machining the first shielding layer (300) on the periphery of the first cable twisting layer (200);
s4, extruding the outer protective sleeve layer (400) on the periphery of the first shielding layer (300).
CN202310281867.8A 2023-03-22 2023-03-22 Torsion-resistant cable for wind driven generator and production process Active CN116072335B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050189135A1 (en) * 2004-02-06 2005-09-01 Clark William T. Bundled cable using varying twist schemes between sub-cables
CN201166996Y (en) * 2007-11-11 2008-12-17 远东电缆有限公司 Twist resistant rubber cover flexible cable for wind power generation
CN102834876A (en) * 2010-02-01 2012-12-19 3M创新有限公司 Stranded thermoplastic polymer composite cable, method of making and using same
CN107945969A (en) * 2017-12-26 2018-04-20 无锡市明珠电缆有限公司 A kind of orbit traffic direct current traction combination flexible cable and preparation method thereof
CN111899922A (en) * 2020-07-23 2020-11-06 四川九洲线缆有限责任公司 Mooring cable for shipboard platform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050189135A1 (en) * 2004-02-06 2005-09-01 Clark William T. Bundled cable using varying twist schemes between sub-cables
CN201166996Y (en) * 2007-11-11 2008-12-17 远东电缆有限公司 Twist resistant rubber cover flexible cable for wind power generation
CN102834876A (en) * 2010-02-01 2012-12-19 3M创新有限公司 Stranded thermoplastic polymer composite cable, method of making and using same
CN107945969A (en) * 2017-12-26 2018-04-20 无锡市明珠电缆有限公司 A kind of orbit traffic direct current traction combination flexible cable and preparation method thereof
CN111899922A (en) * 2020-07-23 2020-11-06 四川九洲线缆有限责任公司 Mooring cable for shipboard platform

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