Torsional fatigue-resistant and corrosion-resistant wind power cable and manufacturing process thereof

Abstract

The invention relates to the technical field of cables, and discloses an anti-torsional fatigue and corrosion-resistant wind power cable and a manufacturing process thereof, the anti-torsional fatigue and corrosion-resistant wind power cable comprises a three-phase cable core main body, a dynamic compensation anti-torsion layer, a multifunctional corrosion-resistant barrier layer and an outer sheath, the three-phase cable core main body comprises a stranded conductor, a filling inner layer and an insulating layer; the dynamic compensation anti-torsion layer comprises an incongruous spiral supporting layer and a shape memory alloy compensation layer, and the incongruous spiral supporting layer comprises aramid fiber bundles and a nickel-cobalt alloy wire woven mesh; the multifunctional anti-corrosion barrier layer is arranged on the outer side of the dynamic compensation anti-torsion layer and sequentially comprises an anti-corrosion barrier bottom layer, an anti-corrosion barrier middle layer and an anti-corrosion barrier bottom layer surface layer from inside to outside. Through the gradient composite structure design, the problem of failure of a traditional wind power cable under long-term dynamic load and severe environment is effectively solved, and the torsional fatigue resistance, the corrosion resistance and the environmental adaptability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, more particularly, it relates to a wind power cable resistant to torsional fatigue and corrosion and a manufacturing process thereof. BACKGROUND

[0002] Wind energy is a green energy, and a wind power cable is a key power transmission component in a wind power generation system, mainly used for connecting a nacelle, a hub and a tower base of a wind turbine generator, and transmitting control signals of components such as a blade variable pitch system and a yaw system. The structure of the wind power cable usually comprises a plurality of twisted copper or aluminum conductors, an insulation layer, a shielding layer, a filler, a sheath and a corrosion-resistant layer. According to different application scenarios, the wind power cable can be divided into a medium / low voltage power cable and a high voltage direct current / alternating current cable.

[0003] In actual operation, the wind power cable needs to bear complex and severe mechanical loads. Long-term torsional swing is one of the core reasons leading to failure of the wind power cable, which specifically manifests as follows: the blades of the wind turbine generator continuously rotate in the process of cutting wind, and the nacelle needs to be periodically adjusted in yaw to track the optimal wind direction, resulting in spiral torsion of the cable along the length direction, and torsional fatigue is easy to cause the sheath to crack and the core wire to break. Therefore, it is urgent to design a wind power cable resistant to torsional fatigue and corrosion to solve the above problems. SUMMARY

[0004] To solve the above technical problems, the present application provides a wind power cable resistant to torsional fatigue and corrosion to solve the problems of core wire breakage and sheath cracking caused by torsional fatigue.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] The present application has the following beneficial technical effects:

[0007] The wind power cable resistant to torsional fatigue and corrosion adopts a gradient composite structure, comprising a three-phase cable core body, a dynamic compensation torsion-resistant layer, a multifunctional corrosion-resistant barrier layer and an outer sheath, the three-phase cable core body is located in the dynamic compensation torsion-resistant layer, and a filler is further arranged in the dynamic compensation torsion-resistant layer.

[0008] The three-phase cable core body comprises a twisted conductor, a filler inner layer and an insulation layer, the filler inner layer fills and entirely wraps the twisted conductor, and the filler inner layer is a silicone rubber matrix.

[0009] The dynamic compensation torsion-resistant layer comprises a counter-helical support layer and a shape memory alloy compensation layer, the counter-helical support layer comprises aramid fiber bundles and a nickel-cobalt alloy wire mesh braid, the aramid fiber bundles are inner layers, the nickel-cobalt alloy wire mesh braid is an outer layer, and the shape memory alloy compensation layer is arranged on the outer side of the nickel-cobalt alloy wire mesh braid.

[0010] The multifunctional anticorrosion barrier layer is arranged outside the dynamic compensation torsion-resistant layer, and sequentially comprises an anticorrosion barrier bottom layer, an anticorrosion barrier intermediate layer and an anticorrosion barrier bottom layer surface layer from inside to outside; the anticorrosion barrier bottom layer is a carbon nanotube reinforced epoxy primer; the anticorrosion barrier intermediate layer is a magnetron sputtering ZrO2 / Al2O3 nanolaminate coating; and the anticorrosion barrier bottom layer surface layer is a graphene-doped conductive polyethylene layer.

[0011] The outer sheath outside the anticorrosion barrier bottom layer surface layer adopts a shape memory polymer matrix composite material, the matrix is modified polyimide 60-70%, the reinforcing phase is a carbon nanotube / glass fiber hybrid filler 25-35%, and the functional phase is encapsulated phase change microcapsules 5-10%.

[0012] As another preferred embodiment of the present application, the spiral angle of the aramid fiber bundle is 35°-45°, the spiral angle of the nickel-cobalt alloy wire braided net is -15° to -5°, and the winding density ratio of the aramid fiber bundle to the nickel-cobalt alloy wire braided net is 3:1; the aramid fiber bundle and the nickel-cobalt alloy wire braided net are anchored by epoxy resin dispensing.

[0013] As another preferred embodiment of the present application, the shape memory alloy compensation layer is a Ni-Ti-Cu alloy wire three-dimensional grid structure, the phase transition temperature of the shape memory alloy compensation layer is 60℃-100℃, and the surface of the shape memory alloy compensation layer is coated with a TiO2 insulating layer.

[0014] As another preferred embodiment of the present application, the anticorrosion barrier intermediate layer is made by an alternating deposition process.

[0015] As another preferred embodiment of the present application, a heat-conducting silicone grease layer is arranged between the dynamic compensation torsion-resistant layer and the multifunctional anticorrosion barrier layer.

[0016] As another preferred embodiment of the present application, the stranded conductor is an annealed soft copper strand, and the insulating layer is alternately coated with ceramicized silicone rubber and mica tape.

[0017] As another preferred embodiment of the present application, the phase change microcapsules of the outer sheath are in a shell-core structure, the shell material is melamine resin, the core material is n-octadecane, and the particle size distribution is 5-15μm.

[0018] As another preferred embodiment of the present application, the outer surface of the outer sheath is provided with a bionic groove structure, the groove depth gradually changes along the axial direction, the change gradient is 0.1mm / m, the cross section is trapezoidal, and the bottom angle is 45°-60°.

[0019] The anti-torsional fatigue and corrosion-resistant wind power cable manufacturing process comprises the following steps:

[0020] S1, anneal soft copper wire 7 with a twist pitch of 8-12 mm, and wrap the outside with a silicone rubber matrix with a thickness of 1-2 mm, then alternately wrap the outside of the silicone rubber matrix with ceramicized silicone rubber and mica tape, with a wrapping thickness of no less than 3 mm, to obtain a plurality of three-phase cable core bodies;

[0021] S2, take three three-phase cable core bodies described above, fill with a filler, and through synchronous operation of a double-station winding machine, wrap aramid fiber bundles outside the filler at a speed of 0.8 m / min and a spiral angle of 40°, and use a nickel-cobalt alloy wire to weave the outer layer of the winding machine at a speed of 0.3 m / min and a spiral angle of -10° to form a nickel-cobalt alloy wire mesh, with a winding density ratio of aramid fiber bundles to nickel-cobalt alloy wire mesh of 3:1; during the winding process, a 2.5 mm side length alloy wire mesh (phase transition temperature 60-100℃) is embedded in the gap between the aramid fiber layers, and is cured through infrared heat pressing (temperature 180℃±10℃, pressure 0.3 MPa);

[0022] S3, use electrostatic spraying technology to uniformly attach carbon nanotube reinforced epoxy primer to the surface of the dynamic compensation torsion-resistant layer, cure at 100℃ for 2 hours, and then continuously and alternately deposit and thin films with a single layer thickness of ≤5 nm and a total number of layers of 200-300 layers at a deposition rate of ≤0.1 nm / s, and then extrude conductive polyethylene doped with graphene with a thickness of 10-20 μm, and after cooling, form a multifunctional corrosion protection barrier layer (4);

[0023] S4, mix modified polyimide (60-70%), carbon nanotube / glass fiber filler (25-35%), and phase change microcapsules (5-10%, particle size 5-15 μm), and then form through mold injection molding;

[0024] laser engrave an axially gradually changing groove (depth variation gradient 0.1 mm / m, trapezoidal cross-section base angle 45°-60°) on the surface of the outer sheath to improve rainwater diversion and anti-icing capacity;

[0025] segmented step heating and curing: inner layer filling 120℃ / 2h→180℃ / 4h→240℃ / 6h, to ensure that the shape memory polymer recovery rate is ≥95%.

[0026] Further, before S3, a 0.3 mm thick layer of heat-conducting silicone grease is applied to the cured dynamic compensation torsion-resistant layer.

[0027] The present application effectively solves the failure problem of traditional wind power cables under long-term dynamic load and harsh environment through gradient composite structure design, significantly improves the torsional fatigue resistance, corrosion resistance, and environmental adaptability. The core technical effects are reflected in the following aspects:

[0028] The gradient energy absorption system adopts a filling inner layer as a flexible buffer matrix, which can efficiently absorb the periodic torsional deformation generated by the rotation of a wind wheel; the torsion torque is balanced through a reverse helical support composite layer structure, and the stress relaxation is compensated in real time by combining the phase change characteristics of the shape memory alloy compensation layer, so that the torsional fatigue life of the cable is improved.

[0029] The multi-dimensional protection of the multifunctional corrosion protection barrier layer, wherein the corrosion protection barrier bottom layer improves the coating adhesion, the corrosion protection barrier intermediate layer forms a dense barrier layer through 200-300 layers of alternating deposition, and effectively blocks water and oxygen penetration; the corrosion protection barrier bottom layer surface layer doped with graphene has excellent electrical conductivity to conduct corrosion current, and cooperates with the TiO2 insulating layer design to realize long-term corrosion peeling in a salt spray environment, and the corrosion protection performance is obviously improved compared with the traditional scheme.

[0030] The extreme environment adaptation capability of the self-adaptive outer sheath, the outer sheath realizes wide temperature range response through phase change microcapsules: solidification enhances flexibility at low temperature, and heat absorption melting delays thermal damage at high temperature, and the cyclic deformation rate is low. The bionic groove structure optimizes the fluid mechanics performance through the gradually changing trapezoidal section, reduces wind resistance noise and reduces the risk of ice accumulation.

[0031] The process innovation guarantees the performance stability, the magnetron sputtering parameters and the segmented step curing make the corrosion protection layer dense and defect-free, and the shape memory alloy has high recovery rate. The cable is superior to the prior art in key indicators such as torsional fatigue, corrosion resistance and temperature impact, and provides a high-reliability transmission solution for offshore wind power, plateau wind power and other scenes. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a partial perspective view of the present application.

[0033] Figure 2 is a cross-sectional view of the present application.

[0034] In the figure: 1, three-phase cable core body; 11, stranded conductor; 12, filling inner layer; 13, insulating layer; 2, filler; 3, dynamic compensation anti-torsion layer; 31, aramid fiber bundle; 32, nickel-cobalt alloy wire mesh; 33, shape memory alloy compensation layer; 4, multifunctional corrosion protection barrier layer; 41, corrosion protection barrier bottom layer; 42, corrosion protection barrier intermediate layer; 43, corrosion protection barrier bottom layer surface layer; 5, outer sheath. DETAILED DESCRIPTION

[0035] In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, the specific embodiments of the present application are further described in detail below in conjunction with the drawings and examples, the following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0036] In combination with Figure 1 -Figure 2 The present application provides the following embodiments:

[0037] The wind power cable is provided with a gradient composite structure, including a three-phase cable core body 1, a dynamic compensation anti-torsion layer 3, a multifunctional corrosion prevention barrier layer 4 and an outer sheath 5. The three-phase cable core body 1 is located in the dynamic compensation anti-torsion layer 3, and the dynamic compensation anti-torsion layer 3 is further provided with a filler 2. The three-phase cable core body 1 includes a stranded conductor 11, a filler inner layer 12 and an insulation layer 13. The filler inner layer 12 fills the gaps of the stranded conductor 11 and wraps the stranded conductor 11 as a whole, and the filler inner layer 12 is a silicone rubber matrix. The filler inner layer 12 is used for absorbing torsional deformation.

[0038] The dynamic compensation anti-torsion layer 3 includes a counter-helical support layer and a shape memory alloy compensation layer 33. The counter-helical support layer is composed of aramid fiber bundles 31 and a nickel-cobalt alloy wire mesh 32. The aramid fiber bundles 31 are the inner layer, and the nickel-cobalt alloy wire mesh 32 is the outer layer. The shape memory alloy compensation layer 33 is arranged outside the nickel-cobalt alloy wire mesh 32. The counter-helical support layer balances the torque, and in combination with the phase change characteristics of the shape memory alloy compensation layer 33, the stress relaxation is compensated in real time, and the torsional fatigue life of the cable is improved.

[0039] The multifunctional corrosion prevention barrier layer 4 is arranged outside the dynamic compensation anti-torsion layer 3. The multifunctional corrosion prevention barrier layer 4 includes, from inside to outside, a corrosion prevention barrier bottom layer 41, a corrosion prevention barrier intermediate layer 42 and a corrosion prevention barrier bottom layer surface layer 43. The corrosion prevention barrier bottom layer 41 is a carbon nanotube reinforced epoxy primer, the corrosion prevention barrier intermediate layer 42 is a magnetron sputtering ZrO2 / Al2O3 nanolayer coating, and the corrosion prevention barrier bottom layer surface layer 43 is a graphene-doped conductive polyethylene layer. The corrosion prevention barrier bottom layer 41 can improve the adhesion of the coating, the corrosion prevention barrier intermediate layer 42 can effectively block water and oxygen penetration, and the corrosion prevention barrier bottom layer surface layer 43 can conduct corrosion current and also has a shielding effect. The design of the multifunctional corrosion prevention barrier layer 4 improves the corrosion prevention effect of the cable.

[0040] The outer sheath 5 outside the corrosion prevention barrier bottom layer surface layer 43 is made of a shape memory polymer matrix composite material. The matrix is modified polyimide 60-70%, the reinforcing phase is carbon nanotube / glass fiber hybrid filler 25-35%, and the functional phase is encapsulated phase change microcapsule 5-10%. The self-adapting outer sheath 5 can improve environmental adaptability, etc.

[0041] As a further improvement of the present application, the aramid fiber bundles 31 have a helix angle of 35°-45°, the nickel-cobalt alloy wire mesh 32 has a helix angle of -15° to -5°, and the winding density ratio of the aramid fiber bundles 31 to the nickel-cobalt alloy wire mesh 32 is 3:1. The aramid fiber bundles 31 and the nickel-cobalt alloy wire mesh 32 are anchored by epoxy resin dispensing. Specifically, the anchor point spacing is ≤5 mm. The epoxy resin anchoring improves the interlayer bonding force and prevents the spiral structure from delaminating or slipping in long-term torsion.

[0042] As a further improvement of the present application, the shape memory alloy compensation layer 33 is a three-dimensional mesh structure of Ni-Ti-Cu alloy wires, the phase transition temperature of the shape memory alloy compensation layer 33 is 60-100℃, and the surface of the shape memory alloy compensation layer 33 is coated with a TiO2 insulating layer. The TiO2 coating isolates the alloy wires from the conductive polyethylene layer, avoiding the risk of short circuit while retaining the thermal response characteristics of the alloy wires.

[0043] As a further improvement of the present application, the anticorrosion barrier intermediate layer 42 is made by an alternating deposition process. The deposition rate of each layer is ≤0.1 nm / s, low-speed deposition ensures coating density, reduces pinhole defects, and improves the barrier ability against salt spray and humid environments.

[0044] As a further improvement of the present application, a heat-conducting silicone grease layer is provided between the dynamic compensation anti-torsion layer 3 and the multifunctional anticorrosion barrier layer 4. The heat-conducting silicone grease layer quickly conducts the heat generated by torsion, preventing local overheating and causing material performance degradation.

[0045] As a further improvement of the present application, the stranded conductor 11 is annealed soft copper wire, and the insulating layer 13 is alternately coated with ceramicized silicone rubber and mica tape. The mica tape improves the corona resistance, and the ceramicized silicone rubber enhances the insulation and heat resistance.

[0046] As a further improvement of the present application, the phase change microcapsules of the outer sheath 5 are in a shell-core structure, the shell material is melamine resin, and the core material is n-octadecane with a particle size distribution of 5-15 μm. N-octadecane solidifies the sheath at low temperatures and absorbs heat and melts at high temperatures, delaying the damage of temperature impact on the internal structure.

[0047] As a further improvement of the present application, the outer surface of the outer sheath 5 is provided with a biomimetic groove structure, the groove depth gradually changes along the axial direction with a change gradient of 0.1 mm / m, and the cross section is trapezoidal with a bottom angle of 45°-60°. The gradually changing grooves reduce wind resistance noise, and the trapezoidal structure enhances rainwater diversion and reduces the risk of ice accumulation.

[0048] The anti-torsion fatigue and corrosion-resistant wind power cable manufacturing process comprises the following steps:

[0049] S1, 7 annealed soft copper wires are twisted at a twisting pitch of 8-12 mm, preferably 8 mm in this embodiment. In addition, the annealed soft copper wires can be silver-treated, and a silicone rubber matrix is coated on the outside, with a thickness of 1-2 mm. Then, ceramicized silicone rubber and mica tape are alternately coated on the outside of the silicone rubber matrix, with a coating thickness of not less than 3 mm, to obtain a plurality of three-phase cable core bodies 1.

[0050] S2, take three three-phase cable core bodies 1, fill with filler 2, and through double-station winding machine synchronous operation, the inner layer of the winding machine is wrapped around the filler 2 with aramid fiber bundle 31, the speed is 0.8 m / min, the spiral angle is 40°, the outer layer of the winding machine is woven with nickel-cobalt alloy wire at a speed of 0.3 m / min, the spiral angle is -10°, forming a nickel-cobalt alloy wire mesh 32, the winding density ratio of aramid fiber bundle 31 and nickel-cobalt alloy wire mesh 32 is 3:1; during the winding process, a Ni-Ti-Cu alloy wire mesh (phase transition temperature 60-100°C) with a side length of 2.5 mm is embedded between the aramid fiber layers, and is cured by infrared heat pressing (temperature 180°C±10°C, pressure 0.3MPa);

[0051] S3, using electrostatic spraying technology, carbon nanotube reinforced epoxy primer is uniformly attached to the surface of the dynamic compensation torsion layer 3, 100°C curing for 2 hours, then through the magnetron sputtering equipment, ZrO2 and Al2O3 films are deposited alternately, the thickness of a single layer is ≤5nm, the total number of layers is 200-300, the deposition rate is ≤0.1nm / s, then the conductive polyethylene doped with graphene is extruded, the thickness is 10-20μm, and after cooling, a multifunctional corrosion-resistant barrier layer 4 is formed;

[0052] S4, after mixing modified polyimide (60-70%), carbon nanotube / glass fiber filler (25-35%) and phase change microcapsule (5-10%, particle size 5-15μm), injection molding is carried out through a mold;

[0053] The surface of the outer sheath is laser engraved with an axially gradually changing groove (depth variation gradient 0.1mm / m, trapezoidal cross-section base angle 45°-60°), which improves the rainwater diversion and anti-icing capacity;

[0054] Segmented step heating and curing: 120°C / 2h→180°C / 4h→240°C / 6h, to ensure that the shape memory polymer recovery rate is ≥95%.

[0055] Through the integrated continuous molding process, the torsion resistance, corrosion resistance and self-adaptive performance of the cable are significantly improved, and the production process is compatible with the existing cable production line, which has industrialization feasibility.

[0056] Further, before S3, a 0.3mm thick heat-conducting silicone layer is applied to the cured dynamic compensation torsion layer 3. The heat-conducting silicone layer can quickly conduct the heat generated by torsion, preventing local overheating and causing material performance degradation.

[0057] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. It should be noted that for ordinary skilled persons in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A wind power cable resistant to torsional fatigue and corrosion, characterized in that, The wind power cable adopts a gradient composite structure, including: a three-phase cable core body (1), a dynamic compensation anti-torsion layer (3), a multi-functional anti-corrosion barrier layer (4) and an outer sheath (5). The three-phase cable core body (1) is located inside the dynamic compensation anti-torsion layer (3), and the dynamic compensation anti-torsion layer (3) is also provided with filler (2). The three-phase cable core body (1) includes a stranded conductor (11), a filling inner layer (12) and an insulation layer (13). The filling inner layer (12) fills the gaps of the stranded conductor (11) and wraps it completely. The filling inner layer (12) is a silicone rubber matrix. The dynamic compensation anti-torsion layer (3) includes an anisotropic helical support layer and a shape memory alloy compensation layer (33). The anisotropic helical support layer includes aramid fiber bundles (31) and nickel-cobalt alloy wire mesh (32). The aramid fiber bundles (31) are the inner layer, the nickel-cobalt alloy wire mesh (32) is the outer layer, and the shape memory alloy compensation layer (33) is located on the outside of the nickel-cobalt alloy wire mesh (32). The multifunctional anti-corrosion barrier layer (4) is disposed on the outside of the dynamic compensation anti-torsion layer (3). The multifunctional anti-corrosion barrier layer (4) consists of an anti-corrosion barrier bottom layer (41), an anti-corrosion barrier middle layer (42), and an anti-corrosion barrier bottom layer surface layer (43) from the inside to the outside. The anti-corrosion barrier bottom layer (41) is a carbon nanotube reinforced epoxy primer, the anti-corrosion barrier middle layer (42) is a magnetron sputtered ZrO2 / Al2O3 nano-layer coating, and the anti-corrosion barrier bottom layer surface layer (43) is a graphene-doped conductive polyethylene layer. The outer sheath (5) on the outside of the bottom surface layer (43) of the anti-corrosion barrier is made of shape memory polymer matrix composite material, with the matrix being 60-70% modified polyimide, the reinforcing phase being 25-35% carbon nanotube / glass fiber hybrid filler, and the functional phase being 5-10% encapsulated phase change microcapsules.

2. The torsional fatigue resistant and corrosion resistant wind power cable according to claim 1, characterized in that, The aramid fiber bundle (31) has a helix angle of 35°–45°, and the nickel-cobalt alloy wire mesh (32) has a helix angle of -15° to -5°. The winding density ratio of the aramid fiber bundle (31) to the nickel-cobalt alloy wire mesh (32) is 3:

1. The aramid fiber bundle (31) and the nickel-cobalt alloy wire mesh (32) are anchored by epoxy resin dispensing.

3. The torsional fatigue resistant and corrosion resistant wind power cable according to claim 2, characterized in that, The shape memory alloy compensation layer (33) is a three-dimensional mesh structure of Ni-Ti-Cu alloy wire. The phase transition temperature of the shape memory alloy compensation layer (33) is 60℃-100℃. The surface of the shape memory alloy compensation layer (33) is coated with a TiO2 insulating layer.

4. The torsional fatigue resistant and corrosion resistant wind power cable according to claim 3, characterized in that, The intermediate layer (42) of the anti-corrosion barrier is made using an alternating deposition process.

5. The torsional fatigue-resistant and corrosion-resistant wind power cable according to claim 4, characterized in that, A thermally conductive silicone grease layer is provided between the dynamic compensation anti-torsion layer (3) and the multifunctional anti-corrosion barrier layer (4).

6. The torsional fatigue-resistant and corrosion-resistant wind power cable according to claim 1, characterized in that, The stranded conductor (11) is an annealed soft copper stranded wire, and the insulation layer (13) is alternately covered with ceramicized silicone rubber and mica tape.

7. The torsional fatigue resistant and corrosion resistant wind power cable according to claim 6, characterized in that, The outer sheath (5) phase change microcapsules have a shell-core structure, with the shell material being melamine resin and the core material being n-octadecane, and the particle size distribution being 5-15μm.

8. The torsional fatigue resistant and corrosion resistant wind power cable according to claim 7, characterized in that, The outer sheath (5) has a biomimetic groove structure on its outer surface. The groove depth gradually changes along the axial direction with a gradient of 0.1 mm / m. The cross-section is trapezoidal with a base angle of 45°-60°.

9. A manufacturing process for wind power cables resistant to torsional fatigue and corrosion, characterized in that... Includes the following steps: S1. Seven annealed soft copper wires are twisted together with a twisting interval of 8-12mm, and a silicone rubber matrix is ​​wrapped around them with a thickness of 1-2mm. Then, ceramicized silicone rubber and mica tape are alternately wrapped around the silicone rubber matrix with a wrapping thickness of not less than 3mm to obtain a number of three-phase cable core bodies (1). S2. Take three of the above three-phase cable core bodies (1), fill them with filler (2), and operate them synchronously through a dual-station winding machine. The inner layer of the winding machine winds aramid fiber bundles (31) around the filler (2) at a speed of 0.8 m / min and a helix angle of 40°. The outer layer of the winding machine is woven with nickel-cobalt alloy wire at a speed of 0.3 m / min and a helix angle of -10° to form a nickel-cobalt alloy wire woven mesh (32). The winding density ratio of aramid fiber bundles (31) to nickel-cobalt alloy wire woven mesh (32) is 3:

1. During the winding process, a Ni-Ti-Cu alloy wire mesh (phase change temperature 60℃-100℃) with a side length of 2.5 mm is embedded into the gap of the aramid fiber layer and cured by infrared hot pressing (temperature 180℃±10℃, pressure 0.3MPa). S3. Using electrostatic spraying technology, carbon nanotube reinforced epoxy primer is uniformly attached to the surface of dynamic compensation anti-torsion layer (3), cured at 100℃ for 2 hours, and then ZrO2 and Al2O3 thin films are continuously and alternately deposited by magnetron sputtering equipment. The thickness of a single layer is ≤5nm, the total number of layers is 200-300, and the deposition rate is ≤0.1nm / s. Then, conductive polyethylene doped with graphene is extruded with a thickness of 10-20μm. After cooling, a multifunctional anti-corrosion barrier layer (4) is formed. S4. After mixing modified polyimide (60-70%), carbon nanotube / glass fiber filler (25-35%) and phase change microcapsules (5-10%, particle size 5-15μm), the mixture is injection molded. The outer sheath surface is laser-engraved with axially gradient grooves (depth variation gradient 0.1mm / m, trapezoidal cross-section base angle 45°-60°) to improve rainwater diversion and anti-icing ability. Segmented step heating and curing: Fill the inner layer (12) 0℃ / 2h→180℃ / 4h→240℃ / 6h, to ensure the shape memory polymer recovery rate ≥95%.

10. The method for manufacturing a torsional fatigue-resistant and corrosion-resistant wind power cable according to claim 9, characterized in that, Before S3, apply a 0.3 mm thick layer of thermally conductive silicone grease to the cured dynamic compensation anti-torsion layer (3).

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