Motor leading cable for wind power equipment

Abstract

The utility model discloses a motor leading cable for wind power equipment. The motor leading cable comprises an inner conductor, and an isolation wrapping layer, a high-temperature-resistant insulating layer and a shielding braid layer which are sequentially arranged outside the inner conductor from inside to outside, the inner conductor is formed by bundling fifth type tinned soft copper conductor monofilaments into a single strand and then twisting a plurality of strands; the thickness of a tin layer of the fifth type tin-plated soft copper conductor monofilament is 0.02-0.04 mm; the shielding braided layer is made of glass fibers or aramid fibers, and the glass fibers or the aramid fibers are subjected to paint dipping treatment by using organic silicon paint before being braided. The cable provided by the utility model has the advantages of good acid and alkali resistance, salt mist resistance, high temperature resistance, bending resistance, strong torsion resistance and long service life.

Description

Technical Field

[0001] The utility model belongs to the field of cables, and in particular relates to a motor connecting cable for wind power equipment. Background Art

[0002] As a clean energy, offshore wind power has developed rapidly in recent years. With the advancement of technology and the reduction of costs, offshore wind power has become an important part of the renewable energy field and is constantly moving towards deep sea, high power and high efficiency.

[0003] Motor lead cables for offshore wind power equipment are key components that connect wind turbines and power systems. They are responsible for transmitting power and signals to ensure the normal operation of wind farms.

[0004] However, the cable leads of wind turbines have been exposed to the complex and harsh marine environment for a long time and have aged, affecting the insulation and mechanical properties of the cables, which has brought great challenges to the operation and maintenance of wind turbines. In addition, since conventional conductive materials are prone to corrosion and oxidation in the marine environment, the conductivity of the cables has decreased, aggravating the heating phenomenon during the use of the cables, which poses a major hidden danger to the safe and stable operation of wind turbines.

[0005] Therefore, in view of the environment of offshore wind power equipment, it is necessary to design a motor connection cable for wind power equipment that is resistant to acid and alkali, salt spray, high temperature, strong torsion resistance, high flexibility and long service life. Summary of the invention

[0006] The utility model aims to provide a motor lead-in cable for wind power equipment which is resistant to acid and alkali, salt spray, high temperature, bending and torsion and has a long service life in view of the deficiencies in the prior art.

[0007] The technical purpose of the utility model is achieved through the following technical solutions:

[0008] A motor connection cable for wind power equipment comprises an inner conductor and an isolation wrapping layer, a high temperature resistant insulating layer and a shielding braided layer which are arranged outside the inner conductor in sequence from the inside to the outside; the inner conductor is made of Class 5 tinned soft copper conductor monofilaments which are first bundled into a single strand, and then a plurality of strands are twisted to form a conductor; the thickness of the tin layer of the Class 5 tinned soft copper conductor monofilament is 0.02 to 0.04 mm; the shielding braided layer is made of glass fiber or aramid fiber, and the glass fiber or aramid fiber is dipped in silicone paint before braiding.

[0009] The braiding density of the shielding braided layer is ≥85%, and the thickness is 0.35-0.45 mm.

[0010] The isolation wrapping layer is made of reinforced polyester wrapping tape or high temperature resistant polyester tape, and the wrapping method is single layer overlapping wrapping with an overlapping rate of 15-20%; or double layer overlapping wrapping is adopted, the wrapping directions are opposite, and the overlapping rate is 10-15%.

[0011] The high temperature resistant insulating layer is made of silicone rubber insulating material, and the thickness of the high temperature resistant insulating layer is 3.0 mm to 3.2 mm.

[0012] The strands of each layer of the inner conductor are twisted in the left direction, the pitch diameter ratio of the inner layer strands is 20 to 26 times, and the pitch diameter ratio of the outer layer strands is 10 to 13 times.

[0013] The fifth type of tinned soft copper conductor is the TXR type tinned soft round copper wire or the TXRH type solderable tinned soft round copper wire in the standard GB / T4910-2022.

[0014] The nominal diameter of the fifth type tinned soft copper conductor monofilament is 0.450-0.510 mm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The inner conductor of the utility model is made of Class 5 tinned soft copper conductor monofilaments which are first bundled into a single strand, and then multiple strands are twisted to form a conductor; by adopting this technology, each layer of strands can fit tightly, the conductor contact resistance is small, and the filling factor is high, which is beneficial to reduce current loss. At the same time, each layer is twisted in the same direction, making the conductor softer and smoother, and improving the bending and torsion resistance of the cable. The isolation wrapping layer is coated on the outside of the inner conductor, the high temperature resistant insulation layer is made of silicone rubber, and the shielding braided layer is made of glass fiber or aramid wire with high tensile strength, high wear resistance and high toughness, and the glass fiber or aramid wire is dipped in silicone paint before braiding. The adoption of this technical measure has good corrosion resistance, aging resistance and wear resistance to resist the influence of seawater, salt spray and wind and waves. At the same time, the current carrying capacity and service life of the wind turbine lead-in cable are improved to ensure the stability and safety during the operation of the wind turbine.

[0017] 2. The utility model adopts high temperature resistant polyester tape as the isolation wrapping layer, and adopts silicone rubber insulation material as the insulation layer, and adopts glass fiber or aramid yarn that is dipped in organic silicone paint before weaving as the shielding braiding layer, which improves the tensile resistance, wear resistance and high toughness of the lead cable. In addition, the temperature resistance level of the cable reaches 150℃, which greatly improves the current carrying capacity and safety performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Reference numerals: 1—inner conductor; 2—isolation wrapping layer; 3—high temperature resistant insulation layer; 4—shielding braided layer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] Example 1

[0024] like Figure 1 As shown, a motor connection cable for wind power equipment includes an inner conductor 1 and an isolation wrapping layer 2, a high temperature resistant insulating layer 3 and a shielding braided layer 4 which are arranged outside the inner conductor 1 from the inside to the outside in sequence; the inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments which are first bundled into a single strand, and then a plurality of strands are twisted to form a conductor; the thickness of the tin layer of the Class 5 tinned soft copper conductor monofilament is 0.02-0.04mm; the shielding braided layer 4 is made of glass fiber or aramid fiber, and the glass fiber or aramid fiber is dipped in silicone paint before braiding.

[0025] Among them, the inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments, which are first bundled into a single strand, and then multiple strands are twisted to form a conductor; the use of this technology allows each layer of strands to fit tightly, the conductor contact resistance is small, and the filling factor is high, which is beneficial to reducing current loss. At the same time, each layer is twisted in the same direction, making the conductor softer and smoother, and improving the bending and torsion resistance of the cable. The isolation wrapping layer 2 is coated on the outside of the inner conductor 1, the high temperature resistant insulation layer 3 is made of silicone rubber, and the shielding braided layer 4 is made of glass fiber or aramid wire with high tensile strength, high wear resistance and high toughness. The use of this technical measure has good corrosion resistance, aging resistance and wear resistance to resist the influence of seawater, salt spray and wind and waves. At the same time, the current carrying capacity and service life are improved to ensure the stability and safety during the operation of the wind turbine.

[0026] Specifically, the inner conductor 1 is made of Class 5 tinned soft copper conductor, and the cross-sectional area of ​​the inner conductor 1 is 240 mm 2 , which is composed of 37 strands of wires twisted together, each of which is composed of 32 tinned soft round copper wires with a diameter of 0.501mm, with a bundled direction of left direction and a conductor cross-section shape of round. The strands of each layer of the inner conductor 1 are twisted in the left direction, the pitch diameter ratio of the inner layer is 20 times, and the pitch diameter ratio of the outer layer is 10 times.

[0027] Among them, the fifth category of tinned soft copper conductors adopts TXR type tinned soft round copper wire or TXRH type solderable tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire". The shape of the single wire is round, the twist direction of each layer is the same, the elongation is not less than 20%, and the thickness of the tin layer is 0.02mm. Among them, the thickness of the tin layer should be accurately controlled. If the thickness of the tin layer is too small, it will affect the anti-oxidation effect of the conductor; if the thickness is too large, it will affect the current carrying capacity of the conductor. The adoption of this technical measure can greatly improve the corrosion resistance of the tinned soft conductor in a humid and salt spray environment, thereby increasing the service life of the cable.

[0028] The isolation wrapping layer 2 is made of high temperature resistant polyester tape with a temperature resistance level of 130-150°C. The wrapping method is single layer overlap with an overlap rate of 15%.

[0029] The high temperature resistant insulation layer 3 is made of black silicone rubber insulation material, which is tightly and evenly extruded on the surface of the isolation wrapping layer 2. The maximum temperature of the cable's continuous operation conductor can reach 180°C. High temperature resistant polyester tape is used as the isolation wrapping layer 2, and silicone rubber insulation material is used as the insulation layer. Glass fiber or aramid yarn that has been dipped in organic silicone paint before braiding is used as the shielding braiding layer 4, which improves the tensile resistance, wear resistance and high toughness of the lead cable. In addition, the cable temperature resistance level reaches 150°C, which greatly improves the current carrying capacity and safety performance of the cable.

[0030] The shielding braided layer 4 is woven with glass fiber or aramid yarn with high tensile strength, high wear resistance and high toughness. Before weaving, it should be impregnated with 200°C temperature-resistant silicone paint, with a braiding density of 85% and a thickness of 0.35mm. With this technical measure, the uniformity and effect of the impregnation will be better; it can enhance the insulation performance, heat resistance, chemical corrosion resistance and mechanical protection of the cable, so as to ensure that the cable maintains a safe and reliable operating state in complex and changing applications.

[0031] Example 2

[0032] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0033] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments which are first bundled into a single strand, and then a plurality of strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 300 mm 2 , is composed of 47 strands of wires twisted together, each strand consists of 30 tinned soft round copper wires with a diameter of 0.501mm, the bundle direction is left-handed, and the conductor cross-section shape is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 22 times, and the pitch diameter ratio of the outer layer is 13 times.

[0034] Among them, the Class 5 tinned soft copper conductor adopts the TXRH type solderable tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire".

[0035] The isolation wrapping layer 2 is made of high temperature resistant polyester tape, and the wrapping method is single layer overlapping wrapping with an overlapping rate of 18%.

[0036] The high temperature resistant insulating layer 3 is made of black silicone rubber insulating material, and the thickness of the high temperature resistant insulating layer 3 is 3.2 mm.

[0037] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, with a braiding density of 88% and a thickness of 0.35 mm.

[0038] Example 3

[0039] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0040] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments bundled into a single strand, and then multiple strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 185mm 2, which is composed of 29 strands of wires twisted together, each of which is composed of 30 tinned soft round copper wires with a diameter of 0.501mm, and the bundling direction is left-handed, and the cross-sectional shape of the inner conductor 1 is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 20.5 times, and the pitch diameter ratio of the outer layer is 11.5 times.

[0041] Category 5 tinned soft copper conductor uses TXRH solderable tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire".

[0042] The isolation wrapping layer 2 is made of high temperature resistant polyester tape, and the wrapping method is double-layer overlapping wrapping, the wrapping directions are opposite, and the overlapping rate is 12%.

[0043] The high temperature resistant insulating layer 3 is made of black silicone rubber and has a thickness of 3.0 mm.

[0044] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, has a braiding density of 90%, and a thickness of 0.38 mm.

[0045] Example 4

[0046] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0047] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments bundled into a single strand, and then multiple strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 150mm 2 , which is made of 20 strands of wires twisted together, each strand consists of 30 tinned soft round copper wires with a diameter of 0.501mm, the bundling direction is left-handed, and the conductor cross-section shape is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 24 times, and the pitch diameter ratio of the outer layer is 11 times.

[0048] Category 5 tinned soft copper conductor uses TXR tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire".

[0049] The isolation wrapping layer 2 is wrapped with a single layer of reinforced polyester wrapping tape with an overlapping rate of 20%.

[0050] The high temperature resistant insulating layer 3 is made of black special silicone rubber insulating material, and the thickness of the insulating layer is 3.0 mm.

[0051] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, with a braiding density of 86% and a thickness of 0.42 mm.

[0052] Example 5

[0053] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0054] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments bundled into a single strand, and then multiple strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 150mm 2 , which is made of 20 strands of wires twisted together, each strand consists of 30 tinned soft round copper wires with a diameter of 0.501mm, the bundling direction is left-handed, and the conductor cross-section shape is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 25 times, and the pitch diameter ratio of the outer layer is 12 times.

[0055] Category 5 tinned soft copper conductor uses TXR tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire".

[0056] The isolation wrapping layer 2 is made of reinforced polyester wrapping tape, and the wrapping method is double-layer overlapping wrapping, the wrapping directions are opposite, and the overlapping rate is 15%.

[0057] The high temperature resistant insulating layer 3 is made of black special silicone rubber insulating material, and the thickness of the insulating layer is 3.2 mm.

[0058] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, with a braiding density of 89% and a thickness of 0.44 mm.

[0059] Example 6

[0060] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0061] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments bundled into a single strand, and then multiple strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 95mm 2 , which is made of 19 strands of wires twisted together, each strand consists of 25 tinned soft round copper wires with a diameter of 0.485mm, the bundling direction is left-handed, and the conductor cross-section is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 26 times, and the pitch diameter ratio of the outer layer is 13 times.

[0062] The fifth type of tinned soft copper conductor adopts the TXR tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire". The thickness of the tin layer is 0.03mm.

[0063] The isolation wrapping layer 2 uses a reinforced polyester wrapping tape, and the wrapping method is single-layer overlapping wrapping with an overlapping rate of 19%.

[0064] The high temperature resistant insulating layer 3 is made of black special silicone rubber insulating material, and the thickness of the insulating layer is 3.0 mm.

[0065] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, with a braiding density of 89% and a thickness of 0.41 mm.

[0066] Example 7

[0067] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0068] The inner conductor 1 is made of Class 5 tinned soft copper conductor monofilaments bundled into a single strand, and then multiple strands are twisted to form a conductor. Specifically, the cross-sectional area of ​​the inner conductor 1 is 70mm 2 , which is made of 19 strands of wires twisted together. The strands are composed of 19 tinned soft round copper wires with a diameter of 0.450mm. The bundling direction is left-handed, and the conductor cross-section is circular. The strands of each layer of the conductor are twisted in the left direction, the pitch diameter ratio of the inner layer is 22 times, and the pitch diameter ratio of the outer layer is 12.5 times.

[0069] The fifth type of tinned soft copper conductor adopts the TXR tinned soft round copper wire specified in GB / T4910-2022 "Tinned soft round copper wire". The thickness of the tin layer is 0.04mm.

[0070] The isolation wrapping layer 2 is made of reinforced polyester wrapping tape, and the wrapping method is double-layer overlapping wrapping, the wrapping directions are opposite, and the overlapping rate is 15%.

[0071] The high temperature resistant insulating layer 3 is made of black special silicone rubber insulating material, and the thickness of the insulating layer is 3.1 mm.

[0072] The shielding braided layer 4 is made of glass fiber or aramid yarn, and should be impregnated with a 200°C temperature-resistant silicone paint before braiding. The braided layer is black in color, with a braiding density of 88% and a thickness of 0.40 mm.

[0073] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A motor lead cable for wind power equipment, characterized in that: It includes an inner conductor and an isolation wrapping layer, a high-temperature resistant insulating layer and a shielding braided layer which are arranged outside the inner conductor in sequence from the inside to the outside; the inner conductor is made of Class 5 tinned soft copper conductor monofilaments which are first bundled into a single strand, and then a plurality of strands are twisted to form a conductor; the thickness of the tin layer of the Class 5 tinned soft copper conductor monofilament is 0.02mm to 0.04mm; the shielding braided layer is made of glass fiber or aramid fiber, and the glass fiber or aramid fiber is dipped in silicone paint before braiding.

2. The motor lead cable for wind power equipment according to claim 1, characterized in that: The braiding density of the shielding braided layer is ≥85%, and the thickness is 0.35-0.45 mm.

3. The motor lead cable for wind power equipment according to claim 1, characterized in that: The isolation wrapping layer is made of reinforced polyester wrapping tape or high temperature resistant polyester tape, and the wrapping method is single layer overlapping wrapping with an overlapping rate of 15-20%; or double layer overlapping wrapping is adopted, the wrapping directions are opposite, and the overlapping rate is 10-15%.

4. The motor lead-in cable for wind power equipment according to claim 1, characterized in that: The high temperature resistant insulating layer is made of silicone rubber insulating material, and the thickness of the high temperature resistant insulating layer is 3.0 mm to 3.2 mm.

5. The motor lead-in cable for wind power equipment according to claim 1, characterized in that: The strands of each layer of the inner conductor are twisted in the left direction, the pitch diameter ratio of the inner layer strands is 20 to 26 times, and the pitch diameter ratio of the outer layer strands is 10 to 13 times.

6. The motor lead-in cable for wind power equipment according to claim 1, characterized in that: The fifth type of tinned soft copper conductor is the TXR type tinned soft round copper wire or the TXRH type solderable tinned soft round copper wire in the standard GB / T4910-2022.

7. The motor lead-in cable for wind power equipment according to claim 1, characterized in that: The nominal diameter of the fifth type tinned soft copper conductor monofilament is 0.450-0.510 mm.

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