A nickel-plated copper-silver alloy conductor high temperature resistant cable and its manufacturing method

Abstract

The invention discloses a nickel-plated copper-silver alloy conductor high temperature-resistant cable and a production method thereof. The cable comprises a conductor, a polytetrafluoroethylene insulation layer, a polyimide insulation layer, an alkali-free glass silk winding layer, a first polytetrafluoroethylene emulsion coating layer, a polytetrafluoroethylene film sheath layer, an alkali-free glass fiber polytetrafluoroethylene line braid layer and a second polytetrafluoroethylene emulsion coating layer which are arranged from the inside to the outside in sequence. The conductor is formed by twisting multiple copper-silver alloy wires of which surfaces are plated with nickel. The cable provided by the invention is a product with relatively high integrated performance. The cable has the advantages of high electric insulation performance, mechanical performance, high temperature-resistance and low temperature-resistance, corrosion resistance and radiation resistance. The cable is mainly applied to occasions such as space shuttles, launch vehicles, satellites and aero-engines with bad working environments and high reliability demands. The cable can be normally used for ages at an environment of 260 degrees centigrade and under the 260 degrees centigrade.

Description

technical field [0001] The invention relates to a nickel-plated copper-silver alloy conductor high temperature resistant cable and a manufacturing method thereof. Background technique [0002] Space shuttles, launch vehicles, satellites, aero engines and other occasions with harsh working environments and high reliability requirements have high requirements for cables. The current manufacturing method of high-temperature-resistant cables generally uses imported silver-plated copper conductors. The high-temperature-resistant cables produced by this method have the following defects: During long-term high-temperature operation, the mechanical strength of the copper conductor will be greatly reduced, and the copper conductor will be brittle and broken after repeated bending and vibration, which will easily cause short-circuit of the distribution line and cause major accidents. PTFE film is wrapped around the glass fiber braid and coated with PTFE emulsion sheath, the surface o...

AI Technical Summary

Problems solved by technology

The current manufacturing method of high-temperature-resistant cables generally uses imported silver-plated copper conductors. The high-temperature-resistant cables produced by this method have the following defects: During long-term high-temperature operation, the mechanical strength of the copper conductor will drop significantly, and the copper conductor will be brittle and broken after repeated bending and vibration, which will easily cause short-circuit of the distribution line and cause major accidents

PTFE film is wrapped around the glass fiber braid and coated with PTFE emulsion sheath, the surface of the cable is sticky, easy to change color, poor insulation and sealing, poor moisture resistance, and the long-term use temperature of the wire cannot reach 250 °C at all, because the silicone paint itself The temperature grade is 180°C. Through the current carrying capacity test of the wire, it is found that when the core current is heated to 200°C, the surface of the wire starts to smoke, and the reliability is poor.

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