Anti-radiation and high-wear-resistance flexible cable

Abstract

The invention discloses an anti-radiation and high-wear-resistance flexible cable, which consists of a conductor, an insulating layer, a composite main shield, a wrapping layer and a sheath layer frominside to outside, wherein the conductor is formed by stranding multiple strands of silver-coated annealed copper wires; the insulating layer is made of a crosslinked ethylene-tetrafluoroethylene copolymer; the composite main shield is formed by twisting an aluminum-plastic composite thin film and a silver-coated annealed copper wire; the wrapping layer is formed by wrapping a layer of halogen-free flame-retardant high-temperature-resistant woven belt; and the sheath layer is made of KEVLAR aramid yarn. The anti-radiation and high-wear-resistance flexible cable can meet the requirement for electrical property and also can meet high-temperature resistance, small size, light weight, flame retardancy, high wear resistance and chemical stability. The cable can keep the specific flexibility and high dielectric strength in extremely complicated and severe environments with various rays and ultraviolet radiations in the aerospace field.

Description

technical field [0001] The invention relates to the technical field of aerospace cables, in particular to a novel highly wear-resistant flexible cable for radiation-proof aerospace electronic communication systems. Background technique [0002] With the rapid development of the aerospace field, higher requirements are placed on the use of wires and cables. In addition to meeting the electrical performance requirements, it is also necessary to meet the requirements of high temperature resistance, small size, light weight, flame retardancy, high wear resistance, chemical stability, and harsh environments where there are various rays and ultraviolet radiation in the aerospace field. Its unique flexibility and high electric strength. Traditional radiation-proof cables use cross-linked ethylene-tetrafluoroethylene copolymer materials as insulation and sheaths, but this material can meet the requirements for radiation protection, high temperature, volume, weight, electrical prope...

AI Technical Summary

Problems solved by technology

Traditional radiation-proof cables use cross-linked ethylene-tetrafluoroethylene copolymer materials as insulation and sheaths, but this material can meet the requirements for radiation protection, high temperature, volume, weight, electrical properties and flame retardancy, but has poor flexibility. The bending radius is limited, and the service life will be reduced when used in such an environment; if non-polar low-density polyethylene is used for insulation, and linear low-density light-resistant and heat-resistant polyethylene is used for the sheath, although radiation protection, electrical properties, weight and volume can reach requirements, but the high temperature, flame retardancy, strength and flexibility are not ideal, and it is not suitable to be used in such a special environment; if cross-linked ethylene-tetrafluoroethylene copolymer material is used for insulation, non-metallic polyester or nylon wire is used for the sheath Carry out mutual cross covering weaving, although the insulation can meet the requirements of radiation resistance, high strength and flame retardancy, and the softness of the sheath can fully meet the requirements, but the wear resistance of the sheath is poor, and its strength is completely lost after X-ray irradiation , it has no protective effect on the cable, and at the same time it has a great impact on the normal electrical system. It is known that this sheath material cannot meet the requirements of special environments. The single metal material for shielding is cross-covered braided shielding. The best processing method, the best weaving angle is designed, and the density is over 95%. Although it has the ability to resist external electromagnetic wave interference, it has poor softness, large weight and volume, and cannot fully meet the requirements of special environments.

After analysis, the existing domestic wire and cable varieties can no longer meet their special matching needs. The radiation-proof, high-wear-resistant, and anti-interference cables are designed for their special environment needs, using new materials and a new structure. flexible cable

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