Cable for wind power generation

Abstract

The invention specifically discloses a cable for wind power generation, and relates to the technical field of power cables, the cable for wind power generation comprises a cable, an isolation sleeve and a sheath layer, the cable comprises a plurality of wire cores, and the plurality of wire cores are twisted; the isolation sleeve wraps the cable, a groove is formed in the peripheral wall of the isolation sleeve between every two adjacent cable cores, and the grooves extend in a spiral shape in the extending direction of the cable; according to the cable for wind power generation provided by the embodiment of the invention, when the cable for wind power generation is twisted along with the swinging of the impeller, the plurality of grooves are deformed and generate elastic force to resist twisting, so that the twisting resistance of the cable for wind power generation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a cable for wind power generation. Background Art

[0002] Wind power cables are an indispensable and important part of wind power generation systems. Their main function is to transmit power and control signals within wind turbine cabins and towers. However, the wind farm environment is relatively harsh, and the cables will twist with the swing of the impellers. Current wind power cables are easily damaged by twisting. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cable for wind power generation, which has a strong anti-twisting ability.

[0004] According to an embodiment of the present invention, a cable for wind power generation includes a cable, an isolation sleeve and a sheath layer, wherein the cable includes a plurality of wire cores, and the plurality of wire cores are twisted; the isolation sleeve wraps the cable, and between each two adjacent wire cores, the outer peripheral wall of the isolation sleeve is provided with a groove, and the groove extends in a spiral shape along the extension direction of the cable; the sheath layer is provided on the outer peripheral side of the isolation sleeve.

[0005] The cable for wind power generation according to the embodiment of the present invention has at least the following beneficial effects: since the outer peripheral wall of the isolation sleeve is provided with grooves between each two adjacent wire cores, and the grooves extend in a spiral shape along the extension direction of the cable, when the cable for wind power generation is twisted with the swing of the impeller, the multiple grooves will deform and generate elastic force to resist the twisting, thereby improving the anti-twisting ability of the cable for wind power generation.

[0006] According to an embodiment of the present invention, the isolation sleeve is made of perfluoroethylene propylene material extruded around the outer circumference of the plurality of wire cores.

[0007] According to an embodiment of the present invention, it further comprises a plurality of first anti-tension ropes, and the plurality of first anti-tension ropes are arranged in the plurality of grooves in a one-to-one correspondence.

[0008] According to an embodiment of the present invention, it further includes a second anti-tension rope, which is arranged at the center of the cable and surrounded by a plurality of the wire cores.

[0009] According to an embodiment of the present invention, the first anti-tensile rope and the second anti-tensile rope are both formed by twisting a plurality of aramid yarns.

[0010] According to an embodiment of the present invention, the sheath layer includes an inner sheath and an outer sheath, the inner sheath is arranged on the outer peripheral side of the isolation sleeve, and the outer sheath is arranged on the outer peripheral side of the inner sheath.

[0011] According to an embodiment of the present invention, the inner sheath and the outer sheath are both formed by extrusion of perfluoroethylene propylene material.

[0012] According to an embodiment of the present invention, the wire core includes a conductor and an insulating layer, and the insulating layer is arranged on the outer peripheral side of the conductor.

[0013] According to one embodiment of the present invention, the conductor is formed by twisting a plurality of highly flexible monofilaments.

[0014] According to an embodiment of the present invention, the insulating layer is formed by extruding a perfluoroethylene propylene material.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 The cross-sectional view of a cable for wind power generation according to an embodiment of the present invention is shown.

[0018] Reference numerals:

[0019] Cables for wind power generation 1000;

[0020] Cable 100; core 110; conductor 111; insulation layer 112;

[0021] Isolation sleeve 200; groove 210;

[0022] Sheath layer 300; inner sheath 310; outer sheath 320;

[0023] A first tensile rope 400;

[0024] The second tensile cord 500 . DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it is necessary to understand that descriptions involving orientations, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Wind power cables are an indispensable and important part of wind power generation systems. Their main function is to transmit power and control signals within wind turbine cabins and towers. However, the wind farm environment is relatively harsh, and the cables will twist with the swing of the impellers. Current wind power cables are easily damaged by twisting.

[0030] To this end, the present invention provides a cable 1000 for wind power generation, specifically referring to the accompanying drawings of the specification. Figure 1 shown.

[0031] Reference Figure 1 As shown, a cable 1000 for wind power generation according to an embodiment of the present invention comprises a cable 100, an isolation sleeve 200 and a sheath layer 300. The cable 100 comprises a plurality of cores 110, and the plurality of cores 110 are twisted. In other words, the plurality of cores 110 are twisted to form the cable 100. It should be noted that the number of cores 110 may be two, three, four, five, six, etc., which is not specifically limited here.

[0032] Reference Figure 1 As shown, in addition, the isolation sleeve 200 wraps the cable 100. That is, the plurality of wire cores 110 are all wrapped inside by the isolation sleeve 200. It should be noted that between each two adjacent wire cores 110, the outer peripheral wall of the isolation sleeve 200 is provided with a groove 210. It can be understood that the number of the grooves 210 is more than two, that is, the outer peripheral wall of the isolation sleeve 200 is provided with a plurality of grooves 210.

[0033] It should be noted that the groove 210 extends in a spiral shape along the extension direction of the cable 100. It is understandable that, since multiple cores 110 are twisted, each core 110 extends in a spiral shape along the extension direction of the cable 100. The groove 210 is provided between two adjacent cores 110, so the groove 210 extends along the two adjacent cores 110, that is, it extends in a spiral shape.

[0034] It is understandable that when the wind power cable 1000 is twisted with the swing of the impeller, the plurality of grooves 210 will deform and generate elastic force to resist the twisting, thereby improving the anti-twisting ability of the wind power cable 1000. In one embodiment, the plurality of cores 110 are not pre-twisted, further improving the anti-twisting ability of the wind power cable 1000.

[0035] Reference Figure 1 As shown, in a cable 1000 for wind power generation according to an embodiment of the present invention, the isolation sleeve 200 is formed by extruding a perfluoroethylene propylene material on the outer peripheral side of a plurality of wire cores 110. That is, the perfluoroethylene propylene material is extruded on the outer peripheral side of a plurality of wire cores 110 to form the isolation sleeve 200. In other words, each wire core 110 is wrapped by the isolation sleeve 200. It should be noted that the perfluoroethylene propylene material is a thermoplastic fluoroplastic, which is a material copolymerized by tetrafluoroethylene and hexafluoropropylene, has good electrical insulation and heat resistance, etc., can be used for a long time in the temperature range of -250°C to 200°C, and exhibits good high and low temperature resistance. Therefore, the isolation sleeve 200 extruded by the perfluoroethylene propylene material can adapt to the high and low temperature environment of the wind farm, and improve the service life of the cable 1000 for wind power generation.

[0036] Reference Figure 1 As shown, a cable 1000 for wind power generation according to an embodiment of the present invention further includes a plurality of first tensile ropes 400. It should be noted that the plurality of first tensile ropes 400 are arranged in a one-to-one correspondence in the plurality of grooves 210. In other words, the number of the first tensile ropes 400 is the same as the number of the grooves 210. It can be understood that, through the above arrangement, the load-bearing capacity and tensile resistance of the cable 1000 for wind power generation can be effectively improved. At the same time, the plurality of first tensile ropes 400 are arranged in a one-to-one correspondence in the plurality of grooves 210, which can save the installation space of the first tensile ropes 400, thereby reducing the volume of the cable 1000 for wind power generation.

[0037] Reference Figure 1As shown, in one embodiment, the cable 1000 for wind power generation further includes a second tensile rope 500. It should be noted that the second tensile rope 500 is arranged at the center of the cable 100 and is surrounded by a plurality of wire cores 110. It is understandable that the second tensile rope 500 is also wrapped in the isolation sleeve 200. It should be noted that there is one second tensile rope 500. It is understandable that, through the above arrangement, the load-bearing capacity and tensile resistance of the cable 1000 for wind power generation are further improved.

[0038] It should be noted that the first tensile rope 400 and the second tensile rope 500 are both formed by twisting multiple strands of aramid yarn. That is to say, the first tensile rope 400 is formed by twisting multiple strands of aramid yarn; the second tensile rope 500 is formed by twisting multiple strands of aramid yarn. It should be noted that aramid yarn is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. It should also be noted that the strength of aramid yarn is 5 to 6 times that of steel wire, and the toughness is 2 times that of steel wire. In a high temperature environment, aramid fiber shows excellent stability, does not decompose or melt at a temperature of 560°C, and has good insulation and aging resistance. Therefore, aramid yarn is an ideal material for the first tensile rope 400 and the second tensile rope 500.

[0039] Reference Figure 1 As shown, in a cable 1000 for wind power generation according to an embodiment of the present invention, the sheath layer 300 is arranged on the outer peripheral side of the isolation sleeve 200. It can be understood that the sheath layer 300 mainly plays a role in protecting the internal structure. In one embodiment, the sheath layer 300 includes an inner sheath 310 and an outer sheath 320. Among them, the inner sheath 310 is arranged on the outer peripheral side of the isolation sleeve 200, and the outer sheath 320 is arranged on the outer peripheral side of the inner sheath 310. It can be understood that through the arrangement of the above two layers of sheaths, the sheath layer 300 can better protect the internal structure.

[0040] In one embodiment, the inner sheath 310 and the outer sheath 320 are both extruded from perfluoroethylene propylene. That is, the inner sheath 310 is extruded from perfluoroethylene propylene; the outer sheath 320 is extruded from perfluoroethylene propylene. That is, the perfluoroethylene propylene is extruded on the outer circumference of the isolation sleeve 200 to form the inner sheath 310, and the perfluoroethylene propylene is extruded on the outer circumference of the inner sheath 310 to form the outer sheath 320. It should be noted that perfluoroethylene propylene is a thermoplastic fluoroplastic, which is a material copolymerized from tetrafluoroethylene and hexafluoropropylene. It has good electrical insulation and heat resistance, etc. It can be used for a long time in the temperature range of -250°C to 200°C, and exhibits good high and low temperature resistance. Therefore, the inner sheath 310 and the outer sheath 320 extruded from perfluoroethylene propylene can adapt to the high and low temperature environment of the wind farm and improve the service life of the cable 1000 for wind power generation.

[0041] Reference Figure 1 As shown, in a cable 1000 for wind power generation according to an embodiment of the present invention, the core 110 includes a conductor 111 and an insulating layer 112. It should be noted that the insulating layer 112 is arranged on the outer peripheral side of the conductor 111. It can be understood that the insulating layer 112 plays a role in insulating the conductor 111. In one embodiment, the conductor 111 is formed by twisting a plurality of high-flexibility monofilaments. It should be noted that high-flexibility monofilaments generally refer to monofilament materials with high flexibility and soft feel. The conductor 111 formed by twisting a plurality of high-flexibility monofilaments has good flexibility and softness, and can meet the use requirements of the cable 1000 for wind power generation.

[0042] In one embodiment, the insulating layer 112 is formed by extruding a perfluoroethylene propylene material. That is, the perfluoroethylene propylene material is extruded on the outer peripheral side of the conductor 111 to form the insulating layer 112. It should be noted that the perfluoroethylene propylene material is a thermoplastic fluoroplastic, which is a material copolymerized by tetrafluoroethylene and hexafluoropropylene, has good electrical insulation and heat resistance, etc., can be used for a long time in the temperature range of -250°C to 200°C, and exhibits good high and low temperature resistance. Therefore, the insulating layer 112 extruded by the perfluoroethylene propylene material can adapt to the high and low temperature environment of the wind farm and improve the service life of the wind power cable 1000.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable for wind power generation, characterized in that: include: A cable, comprising a plurality of wire cores, wherein the plurality of wire cores are twisted; An isolation sleeve wraps the cable, and between each two adjacent wire cores, a groove is provided on the outer peripheral wall of the isolation sleeve, and the groove extends in a spiral shape along the extension direction of the cable; The sheath layer is arranged on the outer peripheral side of the isolation sleeve.

2. The cable for wind power generation according to claim 1, characterized in that: The isolation sleeve is formed by extruding a perfluoroethylene propylene material around the outer circumference of the plurality of wire cores.

3. The cable for wind power generation according to claim 1, characterized in that: It also includes a plurality of first anti-tension ropes, which are arranged in a one-to-one correspondence in the plurality of grooves.

4. The cable for wind power generation according to claim 3, characterized in that: It also includes a second anti-tension rope, which is arranged at the center of the cable and surrounded by a plurality of the wire cores.

5. The cable for wind power generation according to claim 4, characterized in that: The first anti-tension rope and the second anti-tension rope are both formed by twisting a plurality of aramid yarns.

6. The cable for wind power generation according to claim 1, characterized in that: The sheath layer comprises an inner sheath and an outer sheath, wherein the inner sheath is arranged on the outer peripheral side of the isolation sleeve, and the outer sheath is arranged on the outer peripheral side of the inner sheath.

7. The cable for wind power generation according to claim 6, characterized in that: The inner sheath and the outer sheath are both formed by extrusion of perfluoroethylene propylene material.

8. The cable for wind power generation according to claim 1, characterized in that: The wire core includes a conductor and an insulating layer, and the insulating layer is arranged on the outer peripheral side of the conductor.

9. The cable for wind power generation according to claim 8, characterized in that: The conductor is formed by twisting a plurality of highly flexible monofilaments.

10. The cable for wind power generation according to claim 8, characterized in that: The insulating layer is formed by extruding a perfluoroethylene propylene material.

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