Novel wind power distortion-resistant aluminum alloy flexible cable and wind power generation device

Abstract

The utility model provides a novel wind power distortion-resistant aluminum alloy flexible cable and a wind power generation device, and the cable comprises a wire core, a wrapping layer which wraps the periphery of the wire core, an insulating layer which wraps the periphery of the wrapping layer, and a sheath layer which wraps the periphery of the insulating layer. Each strand of conductor comprises a reinforced cable core and a wire wound on the periphery of the reinforced cable core, and the reinforced cable core made of a composite fiber material is arranged in the wire, so that the flexibility of the cable is ensured, the tensile strength and the elongation at break of the cable are remarkably improved, the self weight of the cable is reduced, and the fatigue resistance of the cable core is improved; in the long-time use process, the stability and integrity of the cable structure can be effectively guaranteed, and the cable has the advantages of being simple in structure, long in service life, low in implementation cost, high in structural strength, moderate in softness, good in use experience and convenient to popularize and implement.

Description

Technical Field

[0001] This application belongs to the field of cable manufacturing technology, specifically relating to a new type of torsion-resistant aluminum alloy flexible cable for wind power and a wind power generation device. Background Technology

[0002] In the existing technology, wind power cables are cables specifically designed for the special environment of wind power generation systems. They are typically composed of conductors, insulation layers, and sheaths. These cables are not only responsible for the transmission of electrical energy, but also for the transmission of control signals and data to achieve stable operation and remote monitoring of the wind power generation system. The design requirements for wind power cables are to be able to adapt to complex and changing climatic conditions, such as resistance to low temperatures, ultraviolet radiation, and wind and rain erosion, and they also need to have good oil resistance and electrical performance.

[0003] In existing technologies, during actual wind power generation, aluminum alloy cable conductors are mostly made of a single 8030 type aluminum alloy material, which has low tensile strength and elongation at break. The tensile strength is ≥100MPa and the elongation at break is ≥10%. The core structure is basically designed with reference to the conventional stranded structure of Category 5 copper cables. In actual use, after repeated torsion, this type of cable has serious wire breakage in the inner and outer layers of the conductor, and the resistance is unqualified, which affects the safe operation of the wind power system and poses a significant safety hazard. Therefore, improvements are urgently needed. Utility Model Content

[0004] In order to address the technical problem that in the actual wind power generation process, transmission cables generally use aluminum alloy conductors, which are often drawn from a single 8030 type aluminum alloy material. Their tensile strength and elongation at break are low. In actual use, after the cable is twisted multiple times, there will be serious wire breakage in the inner and outer layers of the conductor, which will reduce the resistance of the cable to below the qualified level, posing a significant safety hazard and resulting in low operating quality, this application proposes a new type of torsion-resistant aluminum alloy flexible cable for wind power.

[0005] In order to solve the technical problems raised in this application, this application also provides a wind power generation device.

[0006] This application adopts the following scheme: a novel torsion-resistant aluminum alloy flexible cable for wind power, comprising a conductor core, a wrapping layer covering the outer periphery of the conductor core, an insulation layer covering the outer periphery of the wrapping layer, and a sheath layer covering the outer periphery of the insulation layer. The conductor core comprises multiple conductors, each conductor comprising a reinforcing core and a wire wound around the reinforcing core on the outer periphery of the reinforcing core, wherein the reinforcing core and the conductor are twisted together.

[0007] In one embodiment, the conductor is made of aluminum alloy and is composed of multiple strands of aluminum alloy wire twisted together.

[0008] In one embodiment, the conductor is wound with multiple strands spaced apart around the reinforcing cable core.

[0009] In one embodiment, the conductor is wound with 3-6 strands spaced apart around the reinforcing cable core.

[0010] In one embodiment, the conductor has 5-7 strands within the wrapping layer.

[0011] In one embodiment, the tensile strength of the wire core is 180-200 MPa, and the elongation at break of the wire core is 15-23%.

[0012] In one embodiment, the reinforcing cable core is made of a fiber composite resin.

[0013] In one embodiment, the reinforcing cable core is made of basalt fiber composite unsaturated polyester resin.

[0014] In one embodiment, the wrapping layer is made of non-woven fabric, the insulating layer is made of cross-linked polyethylene, and the sheath layer is made of styrene-butadiene rubber.

[0015] In order to solve the technical problems raised in this application, this application also proposes a wind power generation device, which includes the above-mentioned novel wind power torsion-resistant aluminum alloy flexible cable.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] This application provides a novel torsion-resistant aluminum alloy flexible cable for wind power and a wind power generation device, comprising a conductor core, a wrapping layer covering the outer periphery of the conductor core, an insulation layer covering the outer periphery of the wrapping layer, and a sheath layer covering the outer periphery of the insulation layer. The conductor core includes multiple conductors, each conductor including a reinforcing core and a wire wound around the outer periphery of the reinforcing core. By setting a reinforcing core made of composite fiber material inside the wire, the cable's tensile strength and elongation at break are significantly improved while ensuring cable flexibility, reducing cable weight, and improving the fatigue strength of the conductor core. During long-term use, the stability and integrity of the cable structure can be effectively guaranteed. It has the advantages of simple structure, long service life, low implementation cost, high structural strength, moderate flexibility, good user experience, and easy promotion and implementation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of a novel torsion-resistant aluminum alloy flexible cable for wind power according to this application;

[0019] Figure 2 This application Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0020] Combination Figure 1-2 The content shown further illustrates the technical solution provided in this application: a novel torsion-resistant aluminum alloy flexible cable for wind power, comprising a conductor 1, a wrapping layer 2 covering the outer periphery of the conductor 1, an insulation layer 3 covering the outer periphery of the wrapping layer 2, and a sheath layer 4 covering the outer periphery of the insulation layer 3. The conductor 1 comprises multiple conductors 10, each conductor 10 comprising a reinforcing core 11 and a wire 12 wound around the reinforcing core 11 as the center and on the outer periphery of the reinforcing core 11. The reinforcing core 11 is twisted with the conductor 10.

[0021] This application provides a novel torsion-resistant aluminum alloy flexible cable for wind power and a wind power generation device, comprising a conductor core, a wrapping layer covering the outer periphery of the conductor core, an insulation layer covering the outer periphery of the wrapping layer, and a sheath layer covering the outer periphery of the insulation layer. The conductor core includes multiple conductors, each conductor including a reinforcing core and a wire wound around the outer periphery of the reinforcing core. By setting a reinforcing core made of composite fiber material inside the wire, the cable's tensile strength and elongation at break are significantly improved while ensuring cable flexibility, reducing cable weight, and improving the fatigue strength of the conductor core. During long-term use, the stability and integrity of the cable structure can be effectively guaranteed. It has the advantages of simple structure, long service life, low implementation cost, high structural strength, moderate flexibility, good user experience, and easy promotion and implementation.

[0022] In this embodiment, the conductor 12 is made of aluminum alloy and is composed of multiple aluminum alloy single wires twisted together.

[0023] In actual implementation, by twisting multiple aluminum alloy single wires into the conductor 12, and then twisting multiple conductors 12 together with reinforcing cores 11 into conductor 10, defects and material inhomogeneities generated during the manufacturing process can be dispersed, thereby significantly improving the reliability and strength of the core 1. Furthermore, it increases flexibility: twisting can make the core more flexible, which is very important in cable applications and can significantly improve the installation and user experience of the cable.

[0024] In this embodiment, the conductor 12 is wound with multiple strands spaced around the reinforcing cable core 11.

[0025] In this embodiment, the conductor 12 is wound with 3-6 strands at intervals around the reinforcing cable core 11.

[0026] In actual implementation, the conductor 12 is wound with 6 strands spaced around the reinforcing cable core 11.

[0027] In this embodiment, the conductor 10 has 5-7 strands inside the wrapping layer 2.

[0028] In actual implementation, the conductor 10 has 7 strands inside the wrapping layer 2.

[0029] In this embodiment, the tensile strength of the core 1 is 180-200MPa, and the elongation at break of the core 1 is 15-23%.

[0030] In this embodiment, the reinforcing cable core 11 is made of fiber composite resin.

[0031] In this embodiment, the reinforcing cable core 11 is made of basalt fiber composite unsaturated polyester resin.

[0032] In actual implementation, the use of fiber composite resin as a reinforcing cable core has the following advantages: First, it has high specific strength and high specific modulus: Fiber composite resin (i.e., FRP) has the characteristics of high specific strength and high specific modulus, which means that it can withstand greater stress and strain per unit weight, thereby providing higher structural efficiency.

[0033] Secondly, it has corrosion resistance and durability. FRP material has good corrosion resistance and durability, which allows it to maintain stable performance in harsh environments and effectively extend the service life of cables.

[0034] Third, its coefficient of thermal expansion is similar to that of concrete. The coefficient of thermal expansion of FRP material is similar to that of concrete, which helps to reduce structural stress and deformation caused by temperature changes.

[0035] Fourth, it is lightweight and has high mechanical strength. FRP material is lightweight and high strength, which allows it to reduce its own weight in building and engineering structures while providing sufficient load-bearing capacity.

[0036] Fifth, it is required to have non-magnetic and insulating properties. FRP materials have non-magnetic and insulating properties (except for CFRP), and can play a role that is difficult for other building materials to replace in certain special structures.

[0037] Sixth, FRP materials have good fatigue resistance and can maintain structural integrity during long-term use.

[0038] In this embodiment, the wrapping layer 2 is made of non-woven fabric, the insulating layer 3 is made of cross-linked polyethylene, and the sheath layer 4 is made of styrene-butadiene rubber.

[0039] In actual implementation, the use of non-woven fabric for the wrapping layer serves the following purposes: First, it tightens the conductor core to prevent it from loosening, effectively maintaining the structural stability of the cable and reducing losses. Second, it controls eccentricity and prevents loose strands. For large-section conductors, the wrapping layer can also control conductor eccentricity and prevent loose strands, thereby ensuring the overall performance of the cable.

[0040] In practical implementation, using cross-linked polyethylene material for the insulation layer has the following advantages:

[0041] Firstly, cross-linked polyethylene has excellent heat resistance, with a long-term working temperature of up to 125℃ and 150℃, and a short-term temperature that can even reach 250℃. This allows wind power cables to maintain stable performance in high-temperature environments. In addition, the heat aging resistance of cross-linked polyethylene is also significantly improved, making it less prone to degradation due to temperature increases during long-term use.

[0042] Secondly, cross-linked polyethylene has high mechanical strength, and its hardness, stiffness, and abrasion resistance are all superior to ordinary polyethylene, making wind power cables more resistant to damage during installation and transportation. Its light weight and small size also save on material and transportation costs.

[0043] Third, cross-linked polyethylene has excellent electrical properties. It not only maintains the original good insulation characteristics of polyethylene, but also further increases the insulation resistance. Its dielectric loss tangent is very small. These characteristics have made wind power cables widely used in the field of high-voltage cables.

[0044] In practical implementation, using styrene-butadiene rubber (SBR) for the sheath layer has the following advantages:

[0045] Firstly, cold resistance: Styrene-butadiene rubber has good cold resistance, which enables it to be used in extreme low temperature environments. For example, new wind power cables use cold-resistant rubber insulation and sheath materials, which can achieve low-temperature bending at -55℃. This allows the rubber-sheathed cable to maintain good performance in cold climate conditions.

[0046] Secondly, mechanical protection: Styrene-butadiene rubber provides better mechanical protection, effectively preventing cables from being mechanically damaged during use. This characteristic makes rubber-sheathed cables perform well in applications such as wind turbine towers that require frequent movement and bending.

[0047] Thirdly, environmental protection characteristics: Styrene-butadiene rubber sheathed cables have excellent environmental performance due to the characteristics of their rubber insulation and sheath materials. Rubber materials have good weather resistance, wear resistance and corrosion resistance, which means that rubber-sheathed cables can reduce the frequency of damage and replacement caused by environmental factors during use, thereby indirectly reducing resource consumption and waste.

[0048] Fourth, flexibility and ease of use: The rubber sheath material improves the flexibility of the cable, making it easier to install and maintain. This flexibility also makes the cable easier to bend and move, reducing the difficulty of construction.

[0049] In order to solve the technical problems raised in this application, this application also proposes a wind power generation device, including the above-mentioned novel wind power torsion-resistant aluminum alloy flexible cable.

[0050] This application provides a novel torsion-resistant aluminum alloy flexible cable for wind power and a wind power generation device, comprising a conductor core, a wrapping layer covering the outer periphery of the conductor core, an insulation layer covering the outer periphery of the wrapping layer, and a sheath layer covering the outer periphery of the insulation layer. The conductor core includes multiple conductors, each conductor including a reinforcing core and a wire wound around the outer periphery of the reinforcing core. By setting a reinforcing core made of composite fiber material inside the wire, the cable's tensile strength and elongation at break are significantly improved while ensuring cable flexibility, reducing cable weight, and improving the fatigue strength of the conductor core. During long-term use, the stability and integrity of the cable structure can be effectively guaranteed. It has the advantages of simple structure, long service life, low implementation cost, high structural strength, moderate flexibility, good user experience, and easy promotion and implementation.

[0051] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel torsion-resistant aluminum alloy flexible cable for wind power, characterized in that, The device includes a wire core (1), a wrapping layer (2) covering the outer periphery of the wire core (1), an insulation layer (3) covering the outer periphery of the wrapping layer (2), and a sheath layer (4) covering the outer periphery of the insulation layer (3). The wire core (1) includes multiple conductors (10), each conductor (10) including a reinforcing cable core (11) and a wire (12) wound around the reinforcing cable core (11) on the outer periphery of the reinforcing cable core (11). The reinforcing cable core (11) and the conductor (10) are twisted together.

2. The novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The conductor (12) is made of aluminum alloy and is composed of multiple aluminum alloy single wires twisted together.

3. The novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The conductor (12) is wound with multiple strands spaced apart around the reinforcing cable core (11).

4. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 3, characterized in that, The conductor (12) is wound with 3-6 strands at intervals around the reinforcing cable core (11).

5. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The conductor (10) has 5-7 strands within the wrapping layer (2).

6. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The tensile strength of the core (1) is 180-200MPa, and the elongation at break of the core (1) is 15-23%.

7. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The reinforcing cable core (11) is made of fiber composite resin.

8. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The reinforcing cable core (11) is made of basalt fiber composite unsaturated polyester resin.

9. A novel torsion-resistant aluminum alloy flexible cable for wind power according to claim 1, characterized in that, The wrapping layer (2) is made of non-woven fabric, the insulation layer (3) is made of cross-linked polyethylene, and the sheath layer (4) is made of styrene-butadiene rubber.

10. A wind power generation device, characterized in that, Including a novel torsion-resistant aluminum alloy flexible cable for wind power as described in any one of claims 1-9.

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