High-temperature- and high-voltage-resistant high-insulating-property ignition cable

Abstract

The invention provides a high-temperature- and high-voltage-resistant high-insulating-property ignition cable, and aims to provide an electromagnetic shielding ignition cable which has strong adaptability to severe environment, small in electromagnetic leakage, high in medium insulation strength and low in transmission loss, can shield stray radiation of ignition energy, can reach high insulation of 20kV in direct current withstand voltage, and can achieve shielding effectiveness of above 50dB. The ignition cable is realized through the following technical scheme: a nickel-core conductor penetrates through an inner-layer insulator, a glass fiber which serves as one of the insulators wraps the nickel-core conductor, the insulator passes through a middle layer corrugated metal hose whose outer layer has a mesh sleeve woven and is wrapped between the nickel-core conductor and the corrugated metal hose, alumina powder is filled in an inner gap between an outer surface of the glass fiber that penetrates into an inner wall of the corrugated metal hose and an inner surface of the corrugated metal hose, and an outer layer shielding body has the metal stainless steel mesh sleeve woven. The high-temperature- and high-voltage-resistant high-insulating-property ignition cable overcomes the defects that a traditional ceramic insulator cable is poor in bending performance, high-altitude performance and anti-mechanical vibration capability and electromagnetic leakage cannot be avoided.

Description

technical field [0001] The invention relates to a power line, control line and signal line widely used in high temperature, humid, dry places and radioactive environments, and is suitable for harsh environments. High-altitude ozone, high dielectric strength, high insulation performance and high-energy ignition cables, especially when the ambient temperature exceeds 50°C, even as high as 400°C, the operating altitude can reach 22,000 meters, and the DC withstand voltage can reach 20kV. High insulation , A single transfer of energy up to 16 joules high-energy ignition cable. Background technique [0002] With the continuous development of aero-engines, the requirements for special cables are getting higher and higher, especially the requirements for high temperature, high altitude and high insulation performance. The ignition system consists of three parts: ignition device, ignition cable and semiconductor electric nozzle (ignition gun). The ignition cable with high temperatu...

AI Technical Summary

Problems solved by technology

Due to the complex electromagnetic environment on site, there is serious crosstalk between braided cables

The technical shortcomings of the engine ignition cable in the prior art are mainly manifested in: ①The electromagnetic shielding performance cannot meet the relevant requirements of the engine catalytic ignition fuel controller timer specification GJB and other relevant regulations; ②The weight of the multilayer metal shield of the ignition cable exceeds the specified requirements; ③Ignition cables have poor manufacturability, which is mainly reflected in the bending requirements in assembly; ④The high temperature and high altitude performance of ignition cables cannot meet the increasingly stringent operating environment requirements

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