Reinforced electric power and signal composite cable for slip ring of fan
By designing a comprehensive cable for power and signal at the sliding ring of the reinforced fan, the problem of wind turbine cables being prone to breakage and aging in extreme environments is solved, and the simultaneous transmission of power and signal and the improvement of cable stability is achieved.
Patent Information
- Application Number
- CN202421864154.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-01
AI Technical Summary
In wind turbines, cables are prone to twisting and bending in extreme environments, causing breakage, conductor core breakage and insulation aging, resulting in shortening of cable life and increasing maintenance costs.
A comprehensive cable for power and signal use at the sliding ring of a reinforced fan is designed. By setting up a power line group, a power line core group and a signal line group as the integrated cable core, and using bundled, twisted, and insulating materials, the structural stability, flexibility, temperature and corrosion resistance of the cable are improved.
It realizes the simultaneous transmission of power and signals, enhances the stability and torsion resistance of the cable, extends the cable life, reduces maintenance costs, and improves the safety and stability of the wind power system.
Smart Images
Figure CN223038645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cables for wind turbines, and particularly to a comprehensive power and signal cable for a reinforced wind turbine slip ring. Background Technique
[0002] The statements herein only provide background techniques related to the utility model, and do not necessarily constitute prior art.
[0003] In a wind power generation unit, a slip ring, as a device for connecting the moving and static parts of a wind turbine and converting energy, is a key component mainly used for transmitting power and signals, and the matching control flexible cable is a medium to ensure the smooth transmission of power and signals.
[0004] Since wind power generation units are mostly installed outdoors, especially in the deep sea or high-temperature and high-altitude areas, the cables need to withstand extreme environmental conditions, such as ultraviolet radiation, high temperature, low temperature, salt spray corrosion, etc. In particular, the wind turbine cables will frequently twist and bend during use, resulting in problems such as the overall breakage of the cable, the breakage of the conductor core, and serious insulation aging, greatly shortening the service life of the cable. In addition, since the wind power generation unit is installed at an altitude of more than 70m, the daily maintenance workload increases. Especially for the units in the harsh marine environment, the maintenance work is more difficult and the maintenance cost is constantly increasing, and the equipment quality problems bring huge pressure to wind power generation enterprises. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a comprehensive power and signal cable for a reinforced wind turbine slip ring. By forming a comprehensive cable with a power line group, a power line core group and a signal line group, the transmission of power and signals is realized at the same time; moreover, by means of bunch stranding, composite stranding and using insulating materials, etc., the structural stability, flexibility, temperature and corrosion resistance of the comprehensive cable are improved, and finally the safety and stability of the cable and the wind power system are improved.
[0006] The purpose of the utility model is to provide a comprehensive power and signal cable for a reinforced wind turbine slip ring, including a power line group, a power line core group, a signal line group, a cable core assembly cable layer and an outer sheath layer; the power line group is arranged at the center of the comprehensive cable, the power line core group and the signal line group are arranged around the power line group, and the power line group, the power line core group and the signal line group form a comprehensive cable core; the outside of the comprehensive cable core is wrapped with a cable core assembly cable layer, and the outside of the cable core assembly cable layer is wrapped with an outer sheath layer.
[0007] As a further technical solution, the power line group includes a power line group core pad, a power line core group, a wrapping layer, and a sheath protection layer, which are arranged in sequence from the inside to the outside; the power line core group is arranged around the power line group core pad, the power line group core pad and the power line core group form a power line group core, the outside of the power line group core is wrapped with a wrapping layer, and the outside of the wrapping layer is wrapped with a sheath protection layer.
[0008] As a further technical solution, the signal line group includes a signal line group core pad, a signal line core group, an isolation layer, a waterproof layer, and a shielding layer, which are arranged in sequence from the inside to the outside; the signal line core group is arranged around the signal line group core pad, the signal line group core pad and the signal line core group form a signal line group core, the outside of the signal line group core is wrapped with an isolation layer, the outside of the isolation layer is wrapped with a waterproof layer, and the outside of the waterproof layer is wrapped with a shielding layer.
[0009] As a further technical solution, the power line core group, the power line core group, and the signal line core group are all composed of insulated wire cores; the insulated wire core includes an internal conductor and an external insulation protection layer.
[0010] As a further technical solution, the internal conductor of the insulated wire core in the power line core group and the power line core group is the 5th type of soft copper conductor, and the internal conductor of the insulated wire core in the signal line core group is the 5th type of special soft copper conductor; the external insulation protection layer is made of flame-retardant cross-linked polyethylene insulating material and has an extrusion structure.
[0011] As a further technical solution, the 5th type of soft copper conductor is formed by first bunching and then stranding the soft copper conductor, and the bunching and stranding directions of the soft copper conductor are both left-handed; the 5th type of special soft copper conductor is formed by stranding the soft copper conductor and copper foil wire.
[0012] As a further technical solution, the wrapping layer is first overlapped and wrapped with a single layer of polyester tape, and then longitudinally wrapped with an aluminum-plastic composite tape.
[0013] As a further technical solution, the outer sheath layer is made of flame-retardant, cold-resistant, and oil-resistant nitrile polyvinyl chloride elastomer material; a flame-retardant tape is wrapped around the outside of the cable core assembly layer.
[0014] As a further technical solution, the isolation layer is made of polyester tape and is overlapped and wrapped in a single layer; the waterproof layer is made of aluminum-plastic composite tape and has a longitudinal wrapping structure; the shielding layer is made of copper wire braided metal shielding.
[0015] As a further technical solution, the sheath protection layer is made of extruded flame-retardant polyvinyl chloride sheath material. The beneficial effects of the above one or more technical solutions:
[0016] (1) In this embodiment, the power cord group, power core group, and signal line group are set as the integrated cable core, so as to ensure that the integrated cable can transmit power and signals simultaneously. At the same time, according to the layout mode that the power core group and the signal line group are arranged around the power cord group, the structural stability and compactness inside the integrated cable are increased, enhancing the stability of the integrated cable.
[0017] (2) In this embodiment, the 5th type of soft copper conductor and the 5th type of special soft copper conductor adopt the non-compact stranded process. The stranding process adopts the bunching and double-stranding structures, and the stranding direction is left-handed, making the relative slip distance between the conductor layers larger, making the internal conductor softer, which is beneficial for the 360° rotation use of the slip ring cable for the wind turbine. In addition, adding copper foil wires to the internal conductors in the signal line group can improve the mechanical properties of the slip ring cable, optimize the electromagnetic shielding performance, improve the processability of the cable, and enhance the strength and flexibility of the conductor of the special cable.
[0018] (3) The cable insulation layer uses flame-retardant cross-linked polyethylene insulating material, which can raise the temperature resistance level of the cable from 70°C to above 100°C, ensuring the service life of the cable during long-term high-temperature operation and avoiding problems such as cable insulation aging and insulation resistance decline. In addition, the cross-linked polyethylene insulating material has good acid and alkali resistance and oil resistance, and is more suitable for the salt spray-resistant use environment of the slip ring cable for the offshore wind turbine.
[0019] (4) In order to avoid the interference of the power core and the external electromagnetic field on the signal line group, a metal wire braided shielding layer is added around the cable layer of the signal line group, thereby improving the anti-electromagnetic field interference of the slip ring cable during use. Especially during high-frequency transmission, the shielding layer can significantly reduce signal distortion, ensure the accuracy of data transmission, and thus improve the safety and stability of the entire wind power system.
[0020] (5) The outer sheath material uses flame-retardant, cold-resistant, and oil-resistant nitrile polyvinyl chloride elastomer, which can better adapt to the harsh environment of the cable used at the slip ring of the generator set. Since nitrile rubber has higher wear resistance and better adhesion than polyethylene, the cable sheath has excellent mechanical strength, can resist abrasion and tearing, and can maintain its excellent physical properties and is not easy to age even when working in the seawater salt spray, acid-base environment for a long time. Description of the Drawings
[0021] The specification drawings forming a part of this application are used to provide a further understanding of this application. For the convenience of understanding, the proportions between various parts of the structure are adjusted. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation to this application.
[0022] Figure 1This is the internal structure diagram of a power and signal integrated cable for an enhanced fan slip ring in the present utility model.
[0023] Among them, 1. Power line group, 2. Power core group, 3. Signal line group, 4. Cable core assembly cable layer, 5. Outer sheath layer, 6. Power line group cushion core, 7. Power core group, 8. Wrapping layer, 9. Sheath protection layer, 10. Signal line group cushion core, 11. Signal core group, 12. Isolation layer, 13. Waterproof layer, 14. Shielding layer, 15. Insulated core, 16. Internal conductor, 17. External insulation protection layer, 18. Type 5 soft copper conductor, 19. Type 5 special soft copper conductor. Specific implementation mode
[0024] The following combines the attached Figure 1 , and clearly and completely describes the technical solutions in the embodiments of the present utility model.
[0025] Embodiment 1
[0026] Referring to Figure 1 , a power and signal integrated cable for an enhanced fan slip ring includes a power line group 1, a power core group 2, a signal line group 3, a cable core assembly cable layer 4, and an outer sheath layer 5. Among them, the power line group 1 is arranged at the center of the integrated cable, and the power core group 2 and the signal line group 3 are arranged around the power line group 1, and the power line group 1, the power core group 2, and the signal line group 3 constitute the integrated cable core.
[0027] By using the power line group 1, the power core group 2, and the signal line group 3 together as the core of the integrated cable, it is ensured that the integrated cable can simultaneously transmit power and signals, thereby improving the comprehensive performance of the integrated cable; at the same time, relying on the layout method of arranging the power core group 2 and the signal line group 3 around the power line group 1, the structural stability and compactness inside the integrated cable are increased, enhancing the stability of the integrated cable.
[0028] And a cable core assembly cable layer 4 is wrapped outside the integrated cable core, and an outer sheath layer 5 is wrapped outside the cable core assembly cable layer. In this embodiment, the cable core assembly cable layer 4 is cabled by a regular stranding method, and a flame retardant tape is wrapped outside; and it is a single-layer overlapping wrapping structure with a lapping rate of 10 - 30%, thereby improving the fire and flame retardancy of the integrated cable.
[0029] Meanwhile, the outer sheath layer 5 is made of nitrile polyvinyl chloride elastomer material with flame retardant, cold resistance and oil resistance properties, and the thickness of the outer sheath is 4.50 - 6.00 mm. According to the elastic properties of the nitrile polyvinyl chloride elastomer material, it can ensure that the surface of the integrated cable has a certain elasticity, enabling the surface of the integrated cable to deform to a certain extent, thus avoiding the problem of easy damage to the surface of the integrated cable. At the same time, it can better adapt to the harsh environment of the cable used at the slip ring of the generator set, and it has high wear resistance and good adhesion, endowing the cable with excellent mechanical strength, capable of resisting wear and tear. Even when working in the seawater salt spray, acid-base environment for a long time, it can maintain its excellent physical properties and is not easy to age.
[0030] In this embodiment, the power line group 1 includes a power line group cushion core 6, a power line core group 7, a wrapping layer 8, and a sheath protection layer 9 arranged in sequence from inside to outside; among them, the power line core group 7 is arranged around the power line group cushion core 6, and the power line group cushion core 6 and the power line core group 7 constitute the power line group core. At the same time, a wrapping layer 8 is wrapped outside the power line group core 6, and a sheath protection layer 9 is wrapped outside the wrapping layer 8.
[0031] The function of the power line group 1 in the integrated cable is to transmit electrical signals and conduct electricity at the same time; and the power line group core 6 is used to improve the roundness of the integrated cable and the power line group 1, and provide electrical energy transmission at the same time. In this embodiment, the wrapping layer 8 is first overlapped and wrapped with a single-layer polyester tape, and the overlapping rate is 10% - 30%, and then longitudinally wrapped with an aluminum-plastic composite tape to play a waterproof protection role at the same time; through the above wrapping steps and overlapping rate, the roundness and anti-torsion ability of the cable are further improved, thus avoiding the phenomenon of cable damage caused by torsion and other steps of the integrated cable. At the same time, the sheath protection layer 8 is made of extruded flame-retardant polyvinyl chloride sheath material, and the sheath thickness is 1.0 - 1.6 mm; and this material has the same principle as the nitrile polyvinyl chloride used in the outer sheath layer 5, and further improves the flame-retardant performance of the cable.
[0032] In this embodiment, the signal line group 3 includes a signal line group cushion core 10, a signal line core group 11, an isolation layer 12, a waterproof layer 13, and a shielding layer 14 arranged in sequence from inside to outside; and the signal line core group 11 is arranged around the signal line group cushion core 10, and the signal line group cushion core 10 and the signal line core group 11 constitute the signal line group core. Its layout is the same as that of the power line group 1, which also increases its own structural stability.
[0033] An isolation layer 12 is wrapped around the outside of the signal wire core group. A waterproof layer 13 is wrapped around the outside of the isolation layer 12. A shielding layer 14 is wrapped around the outside of the waterproof layer 13. In this embodiment, the isolation layer 12 is made of polyester tape, which is overlapped and wound in a single layer with a lapping rate of 10 - 30%, and is used to isolate the signal wire core group from the waterproof layer 13 to protect the signal wire core group from being damaged. The waterproof layer 13 is made of aluminum-plastic composite tape with a longitudinal wrapping structure and a tape thickness of 0.30 - 0.50 mm, which is used to improve the waterproof performance of the signal wire group 3. The shielding layer 14 is made of copper wire braided metal shielding with a braiding density of 80% - 90%, which is used to shield the internal and external electric fields and prevent interference signal transmission.
[0034] In this embodiment, the power wire core group 2, the power supply wire core group 7, and the signal wire core group 11 are all composed of insulated wire cores 15. The insulated wire core 15 includes an internal conductor 16 and an external insulation protection layer 17.
[0035] Among them, the internal conductor 16 of the insulated wire cores in the power wire core group 2 and the power supply wire core group 7 is the 5th type of soft copper conductor 18, while the internal conductor 16 of the insulated wire cores in the signal wire core group 11 is the 5th type of special soft copper conductor 19. Their external insulation protection layers 17 are all made of extruded flame-retardant cross-linked polyethylene insulating material with an extrusion structure. The thickness of the external insulation protection layer 17 in the power wire core group 2 and the power supply wire core group 7 is 0.7 - 1.8 mm, while the thickness of the external insulation protection layer 17 in the signal wire core group 11 is 0.60 - 0.70 mm.
[0036] Specifically, the 5th type of soft copper conductor 18 is first bunch-stranded and then double-stranded by a number of soft copper conductors with a single wire diameter of 0.20 - 0.50 mm, and the bunch-stranding and double-stranding twisting directions of the soft copper conductors in each group are all left-handed. The 5th type of special soft copper conductor 19 is composed of a number of soft copper conductors with a single wire diameter of 0.20 - 0.50 mm and copper foil wires twisted together. This is because the signal wire core group 11 is used to transmit signal data, which needs to shield against external interference to avoid other interferences, thereby improving the signal transmission efficiency and accuracy of the signal wire core group 11 itself. Adding copper foil wires to the internal conductor 16 in the signal wire core group 11 can improve the mechanical properties of the slip ring cable, optimize the electromagnetic shielding performance, improve the processability of the cable, and enhance the strength and flexibility of the special cable conductor. Especially during high-frequency transmission, the shielding layer can significantly reduce signal distortion, ensure the accuracy of data transmission, and thus improve the safety and stability of the entire wind power system.
[0037] Meanwhile, for the 5th type of soft copper conductor 18 in the power core wire group 2, the bunching pitch diameter ratio of the conductor strands is 16 to 28 times, and the multiple-strand bunching pitch diameter ratio is 10 to 13 times; for the 5th type of soft copper conductor 18 in the power cord group 1, the bunching pitch diameter ratio of the conductor strands is 16 to 26 times, and the multiple-strand bunching pitch diameter ratio is 10 to 13 times; for the 5th type of special soft copper conductor 19 in the signal wire group 3, the bunching pitch diameter ratio of the conductor strands is 16 to 26 times, and the multiple-strand bunching pitch diameter ratio is 10 to 13 times. Among them, the above-mentioned bunching pitch diameter ratio and multiple-strand bunching pitch diameter ratio can ensure the tightness and flexibility of the conductor, and improve the anti-torsion and bending performance of the cable under normal working conditions.
[0038] In the above way, using the non-compressed stranding process, the stranding process adopts a bunching and multiple-strand bunching structure and the stranding direction is left-handed, which makes the relative sliding distance between the conductor layers larger, makes the internal conductor softer, is conducive to the 360° rotation use of the wind turbine slip ring cable, and improves the application range of the cable.
[0039] Among them, by using flame-retardant cross-linked polyethylene insulating material for the external insulation protection layer 17, the heat resistance level of the cable can be increased from 70°C to above 100°C, while ensuring the service life of the cable during long-term high-temperature operation, and avoiding problems such as cable insulation aging and insulation resistance decline; in addition, the cross-linked polyethylene insulating material has good acid and alkali resistance and oil resistance, and is more suitable for the salt spray-resistant use environment of the offshore wind turbine slip ring cable.
[0040] In this embodiment, the range intervals of parameters such as the thickness, diameter, multiple-strand bunching pitch diameter ratio, and bunching pitch diameter ratio of different structures can be used to construct different cables through adaptive adjustment for different positions in the wind turbine unit.
[0041] Embodiment 2
[0042] Based on the structure of the enhanced power and signal integrated cable used at the wind turbine slip ring described in Embodiment 1, the various materials and data in the integrated cable are adjusted as follows:
[0043] Power core wire group:
[0044] The 5th type of soft copper conductor 18 is formed by first bunching and then multiple-strand bunching several soft copper conductors with a single wire diameter of 0.285 mm. The bunching pitch diameter ratio of the conductor strands is 20 times, and the multiple-strand bunching pitch diameter ratio is 11.5 times. And the 5th type of soft copper conductor 18 is first bunched into strands and then multiple-strand bunching is carried out. The bunching and multiple-strand bunching directions are the same and left-handed; meanwhile, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is set as an extrusion structure, and the insulation thickness is 0.8 mm.
[0045] Power cord group:
[0046] The 5th type of soft copper conductor 18 is formed by first bunch-stranding and then double-stranding a number of soft copper conductors with a single wire diameter of 0.285 mm. The bunch-stranding pitch diameter ratio of the conductor strands is 16 - 22 times, and the double-stranding pitch diameter ratio of multiple strands is 12 times. Moreover, the 5th type of soft copper conductor 18 is first bunch-stranded into strands and then double-stranded. The bunch-stranding and double-stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses a flame-retardant cross-linked polyethylene insulating material, is set as an extrusion coating structure, and the insulation thickness is 0.8 mm.
[0047] The wrapping layer 8 uses a polyester tape film, is overlapped and wrapped in a single layer, and the lapping rate is 25%, and then is longitudinally wrapped with an aluminum-plastic composite tape.
[0048] The sheath protection layer 9 uses a flame-retardant polyvinyl chloride sheath material, is an extrusion coating structure, and the sheath thickness is 1.0 mm.
[0049] Signal wire group:
[0050] The 5th type of special soft copper conductor 19 is composed of a number of soft copper conductors with a single wire diameter of 0.285 mm and copper foil wires with a diameter of 0.260 mm stranded together. The bunch-stranding pitch diameter ratio of the conductor strands is 20 times; the double-stranding pitch diameter ratio of multiple strands is 11.5 times. Its external insulation protection layer 17 uses a flame-retardant cross-linked polyethylene insulating material, is an extrusion coating structure, and the thickness is 0.60 mm.
[0051] The isolation layer 12 uses a polyester tape, is overlapped and wrapped in a single layer, and the lapping rate is 25%.
[0052] The waterproof layer 13 uses an aluminum-plastic composite tape, is a longitudinal wrapping structure, and the tape thickness is 0.30 - 0.50 mm.
[0053] The shielding layer 14 uses a copper wire braided metal shield, and the braiding density is 90%.
[0054] The cable core assembly layer 4 is cabled in a regular stranding manner, and there is a flame-retardant tape wrapped outside; and it is overlapped and wrapped in a single layer, and the lapping rate is 15%.
[0055] The outer sheath layer 5 uses a flame-retardant, cold-resistant, and oil-resistant nitrile polyvinyl chloride elastomer material, and the outer sheath thickness is 4.50 mm.
[0056] The composite cable in this embodiment is suitable for wind turbine units with low transmission capacity and low requirements for anti-interference ability.
[0057] Embodiment Three
[0058] Based on the structure of a reinforced power and signal composite cable used at the wind turbine slip ring described in Embodiment One, the various materials and data in the composite cable are adjusted as follows:
[0059] Power wire core group:
[0060] The 5th type of soft copper conductor 18 is formed by first bunching and then stranding several soft copper conductors with a single wire diameter of 0.385 mm. The bunching pitch diameter ratio of the conductor strands is 24 times, and the stranding pitch diameter ratio of multiple strands is 13 times. Moreover, the 5th type of soft copper conductor 18 is first bunched into strands and then stranded. The bunching and stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is set as an extrusion coating structure, and the insulation thickness is 0.9 mm.
[0061] Power cord group:
[0062] The 5th type of soft copper conductor 18 is formed by first bunching and then stranding several soft copper conductors with a single wire diameter of 0.385 mm. The bunching pitch diameter ratio of the conductor strands is 24 times, and the stranding pitch diameter ratio of multiple strands is 13 times. Moreover, the 5th type of soft copper conductor 18 is first bunched into strands and then stranded. The bunching and stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is set as an extrusion coating structure, and the insulation thickness is 1.0 mm.
[0063] The wrapping layer 8 uses polyester tape film, is overlapped and wrapped in a single layer, and the lapping rate is 10 - 30%, and then is longitudinally wrapped with aluminum-plastic composite tape.
[0064] The sheath protection layer 9 uses flame-retardant polyvinyl chloride sheath material, is an extrusion coating structure, and the sheath thickness is 1.2 mm.
[0065] Signal wire group:
[0066] The 5th type of special soft copper conductor 19 is composed of several soft copper conductors with a single wire diameter of 0.385 mm and copper foil wires with a diameter of 0.305 mm stranded together. The bunching pitch diameter ratio of the conductor strands is 22 times; the stranding pitch diameter ratio of multiple strands is 12 times. Its external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is an extrusion coating structure, and the thickness is 0.60 mm.
[0067] The isolation layer 12 uses polyester tape, is overlapped and wrapped in a single layer, and the lapping rate is 15%.
[0068] The waterproof layer 13 uses aluminum-plastic composite tape, is a longitudinal wrapping structure, and the tape thickness is 0.30 - 0.50 mm.
[0069] The shielding layer 14 uses copper wire braided metal shielding, and the braiding density is 85%.
[0070] The cable core assembly layer 4 is cabled by a regular stranding method, and there is a flame-retardant tape wrapped outside; and it is overlapped and wrapped in a single layer, and the lapping rate is 15%.
[0071] The outer sheath layer 5 uses flame-retardant, cold-resistant, and oil-resistant nitrile polyvinyl chloride elastomer material, and the outer sheath thickness is 4.70 mm.
[0072] Example 4
[0073] Based on the structure of the integrated power and signal cable used at the slip ring of the enhanced fan described in Embodiment 1, the various materials and data in the integrated cable are adjusted as follows:
[0074] Power line core group:
[0075] The 5th type of soft copper conductor 18 is formed by first bunching and then stranding several soft copper conductors with a single wire diameter of 0.450 mm. The bunching pitch diameter ratio of the conductor strands is 22 times, and the stranding pitch diameter ratio of multiple strands is 12.5 times. And the 5th type of soft copper conductor 18 is first bunched into strands and then stranded. The bunching and stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is set as an extrusion structure, and the insulation thickness is 1.40 mm.
[0076] Power cord group:
[0077] The 5th type of soft copper conductor 18 is formed by first bunching and then stranding several soft copper conductors with a single wire diameter of 0.450 mm. The bunching pitch diameter ratio of the conductor strands is 21 times, and the stranding pitch diameter ratio of multiple strands is 11.5 times. And the 5th type of soft copper conductor 18 is first bunched into strands and then stranded. The bunching and stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is set as an extrusion structure, and the insulation thickness is 1.4 mm.
[0078] The wrapping layer 8 uses polyester film, is overlapped and wrapped in a single layer, and the lapping rate is 20%, and then longitudinally wrapped with an aluminum-plastic composite tape.
[0079] The sheath protection layer 9 uses flame-retardant polyvinyl chloride sheath material, is an extrusion structure, and the sheath thickness is 1.6 mm.
[0080] Signal line group:
[0081] The 5th type of special soft copper conductor 19 is composed of several soft copper conductors with a single wire diameter of 0.450 mm and copper foil wires with a diameter of 0.350 mm stranded together. The bunching pitch diameter ratio of the conductor strands is 20 times; the stranding pitch diameter ratio of multiple strands is 11.5 times. Its external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, is an extrusion structure, and the thickness is 0.70 mm.
[0082] The isolation layer 12 uses polyester tape, is overlapped and wrapped in a single layer, and the lapping rate is 20%.
[0083] The waterproof layer 13 uses an aluminum-plastic composite tape, is a longitudinal wrapping structure, and the tape thickness is 0.30 - 0.50 mm.
[0084] The shielding layer 14 uses copper wire braided metal shielding, and the braiding density is 90%.
[0085] The cable core assembly cable layer 4 is cabled by regular stranding, and is wrapped with a flame-retardant tape on the outside; and it is wrapped by single-layer overlapping, with a lapping rate of 10%.
[0086] The outer sheath layer 5 is made of flame-retardant, cold-resistant and oil-resistant nitrile polyvinyl chloride elastomer material, and the thickness of the outer sheath is 5.60 mm.
[0087] Example 5
[0088] Based on the structure of the enhanced power and signal integrated cable used at the slip ring of the fan described in Example 1, the various materials and data in the integrated cable are adjusted as follows:
[0089] Power line core group:
[0090] The 5th type of soft copper conductor 18 is formed by first bunch stranding and then double stranding a number of soft copper conductors with a single wire diameter of 0.50 mm. The bunch stranding pitch diameter ratio of the conductor strands is 26 times, and the double stranding pitch diameter ratio of multiple strands is 13 times. And the 5th type of soft copper conductor 18 is first bunch stranded into strands and then double stranded. The bunch stranding and double stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, which is set as an extrusion coating structure, and the insulation thickness is 1.8 mm.
[0091] Power cord group:
[0092] The 5th type of soft copper conductor 18 is formed by first bunch stranding and then double stranding a number of soft copper conductors with a single wire diameter of 0.50 mm. The bunch stranding pitch diameter ratio of the conductor strands is 24 times, and the double stranding pitch diameter ratio of multiple strands is 13 times. And the 5th type of soft copper conductor 18 is first bunch stranded into strands and then double stranded. The bunch stranding and double stranding directions are the same and are left-handed; at the same time, the external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, which is set as an extrusion coating structure, and the insulation thickness is 1.8 mm.
[0093] The wrapping layer 8 uses polyester film, and is wrapped by single-layer overlapping with a lapping rate of 25%, and then longitudinally wrapped with an aluminum-plastic composite tape.
[0094] The sheath protection layer 9 uses flame-retardant polyvinyl chloride sheath material, which is an extrusion coating structure, and the sheath thickness is 1.6 mm.
[0095] Signal line group:
[0096] The 5th type of special soft copper conductor 19 is composed of a number of soft copper conductors with a single wire diameter of 0.50 mm and copper foil wires with a diameter of 0.45 mm stranded together. The bunch stranding pitch diameter ratio of the conductor strands is 22 times; the double stranding pitch diameter ratio of multiple strands is 11 times. Its external insulation protection layer 17 uses flame-retardant cross-linked polyethylene insulating material, which is an extrusion coating structure, and the thickness is 0.70 mm.
[0097] The isolation layer 12 uses polyester tape, and is wrapped by single-layer overlapping with a lapping rate of 25%.
[0098] The waterproof layer 13 is made of an aluminum-plastic composite tape, with a longitudinal wrapping structure, and the tape thickness is 0.30 - 0.50 mm.
[0099] The shielding layer 14 is made of a copper wire braided metal shield, and the braiding density is 80%.
[0100] The cable core assembly layer 4 of the cable is cabled by a regular stranding method, and a flame-retardant tape is wrapped around the outside; and a single-layer overlapping wrapping is adopted, with a lapping rate of 15%.
[0101] The outer sheath layer 5 is made of a flame-retardant, cold-resistant and oil-resistant nitrile polyvinyl chloride elastomer material, and the outer sheath thickness is 6.00 mm.
[0102] The integrated cable in this embodiment is applicable to high-power wind turbine current transmission and the use scenario of wind turbines with high-frequency anti-interference ability.
[0103] In the above-mentioned second to fifth embodiments, the cross-sectional specifications of the conductors gradually increase, and the characteristics lie in the current-carrying capacity and anti-interference ability of the integrated cable.
[0104] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative labor by those skilled in the art are still within the protection scope of the present invention.
Claims
1. A reinforced power and signal integrated cable for wind turbine slip ring, characterized in that: It includes a power line group, a power line core group, a signal line group, a cable core assembly cable layer and an outer sheath layer; the power line group is arranged at the center of the integrated cable, the power line core group and the signal line group are arranged around the power line group, and the power line group, the power line core group and the signal line group constitute an integrated cable core; the outside of the integrated cable core is wrapped with a cable core assembly cable layer, and the outside of the cable core assembly cable layer is wrapped with an outer sheath layer.
2. A reinforced integrated power and signal cable for wind turbine slip ring as claimed in claim 1, characterized in that: The power cord group includes a power cord group cushion core, a power cord core group, a wrapping layer and a sheath protective layer which are arranged in sequence from the inside to the outside; the power cord core group is arranged around the power cord group cushion core, the power cord group cushion core and the power cord core group constitute the power cord group core, the outside of the power cord group core is wrapped with a wrapping layer, and the outside of the wrapping layer is wrapped with a sheath protective layer.
3. The reinforced wind turbine slip ring integrated power and signal cable as claimed in claim 1, characterized in that: The signal line group includes a signal line group cushion core, a signal line core group, an isolation layer, a waterproof layer and a shielding layer which are arranged in sequence from the inside to the outside; the signal line core group is arranged around the signal line group cushion core, the signal line group cushion core and the signal line core group constitute a signal line group core, the outside of the signal line group core is wrapped with an isolation layer, the outside of the isolation layer is wrapped with a waterproof layer, and the outside of the waterproof layer is wrapped with a shielding layer.
4. A reinforced integrated power and signal cable for wind turbine slip ring as claimed in claim 1, characterized in that: The power core group, the power core group and the signal core group are all composed of insulating cores; the insulating cores include an inner conductor and an outer insulating protective layer.
5. A reinforced integrated power and signal cable for wind turbine slip ring as claimed in claim 4, characterized in that: The internal conductors of the insulated cores in the power core group and the power core group are the fifth type of soft copper conductors, and the internal conductors of the insulated cores in the signal core group are formed by twisting soft copper conductors and copper foil wires; the external insulating protective layer is made of flame-retardant cross-linked polyethylene insulation material and is an extruded structure.
6. A reinforced integrated power and signal cable for wind turbine slip ring as claimed in claim 5, characterized in that: The fifth type of soft copper conductor is formed by first bundling and then re-twisting the soft copper conductors, and the bundling and re-twisting directions of the soft copper conductors are both left-handed.
7. A reinforced integrated power and signal cable for wind turbine slip ring as claimed in claim 2, characterized in that: The wrapping layer is firstly wrapped with a single layer of polyester tape in an overlapping manner, and then longitudinally wrapped with an aluminum-plastic composite tape.
8. The reinforced wind turbine slip ring integrated power and signal cable as claimed in claim 1, characterized in that: The outer sheath layer is made of flame-retardant, cold-resistant and oil-resistant nitrile polyvinyl chloride elastomer material; the cable core assembly cable layer is wrapped with a flame-retardant tape on the outside.
9. The reinforced wind turbine slip ring integrated power and signal cable as claimed in claim 3, characterized in that: The isolation layer is made of polyester tape, which is wrapped in a single layer of overlapping layers; the waterproof layer is made of aluminum-plastic composite tape, and has a longitudinal wrapping structure; and the shielding layer is made of copper wire braided metal shielding.
10. The reinforced wind turbine slip ring integrated power and signal cable as claimed in claim 2, characterized in that: The sheath protective layer is made of extruded flame-retardant polyvinyl chloride sheath material.