Special cable resistant to 1600 DEG C ultra-high temperature and flame scouring, and preparation method thereof

Abstract

The invention discloses a special cable resistant to 1600 DEG C ultra-high temperature and flame scouring. The cable sequentially comprises a conductor core, a polyimide composite insulating layer, asilicone rubber inner layer, an aerogel felt layer, a threaded pipe and a silicone rubber outer layer from inside to outside, wherein the silicone rubber outer layer is connected with a circle of silicone rubber composite ceramic layer through an L-shaped support, the conductor core is formed by concentrically stranding a plurality of strands of nickel-plated soft copper wires in the same direction, and the polyimide composite insulating layer is formed by winding a polyimide insulating film tape and then softening and sintering at high temperature; the aerogel felt layer is formed by windingaerogel felt belts in the same direction; and liquid nitrogen filled in threaded pipe. According to the novel special cable structure provided by the invention, a multiple heat insulation method of silicone rubber ceramization, air heat insulation, liquid nitrogen cooling, aerogel heat insulation and insulating film heat insulation is realized, the weight is light, the bending performance is relatively good, the installation and the use are convenient, the cable can resist the high temperature of 1600 DEG C, a large-current conduction state can be kept within 30 seconds, and the current is basically constant; the special cable can adapt to the ignition launching process of the rocket thruster.

Description

technical field [0001] The invention relates to the technical field of special cables, in particular to a 1600°C ultra-high temperature flame erosion resistant special cable and a preparation method thereof. Background technique [0002] With the development of our country's launch vehicle, a space transportation tool composed of multi-stage rockets. The purpose is to send payloads such as artificial earth satellites, manned spacecraft, space stations, and space probes into predetermined orbits. At present, the commonly used launch vehicles can be divided into three types according to the propellants used: solid rockets, liquid rockets and solid-liquid hybrid rockets. For example, my country's Long March 3 launch vehicle is a three-stage liquid rocket; the Long March 1 launch vehicle is a solid-liquid mixed three-stage rocket, the first and second stages are liquid rockets, and the third stage is a liquid rocket. Solid rockets; according to the number of stages, launch vehi...

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Problems solved by technology

[0005] However, the disadvantage of mineral insulation is that it is too hard to bend, and the electrical performance is unstable under high-frequency vibration, which is not easy to install and use.

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