Compound woven electric heating film and electric heating structure used for ice prevention and removal

Abstract

The invention discloses a compound woven electric heating film and an electric heating structure used for ice prevention and removal. The compound woven electric heating film used for ice prevention and removal is internally mixed and woven by carbon-based electric conduction fibers and metal electric conduction fiber layers and is manufactured in a way that the carbon-based electric conduction fibers are taken as a warp direction fiber bundle, the metal electric conduction fibers are taken as a weft direction fiber bundle, or the metal electric conduction fibers are taken as the warp direction fiber bundle, and the carbon-based electric conduction fibers are taken as the weft direction fiber bundle, and the warp direction fiber bundles and the weft direction fiber bundles are woven according to a drill weave cloth weaving or satin weave cloth weaving method. The compound woven electric heating film is small in fiber bending and has a minimum fiber strength loss, the obtained electricheating film exhibits good flexibility, can cover the surface of a workpiece with a complex shape and has excellent electric conduction and heat conduction performance, in addition, mechanical performance and electricity-heat conversion efficiency are improved, and more importantly, the compound woven electric heating film is lighter than a metal net. The compound woven electric heating film and an insulating thermal-insulation film can be adopted to cover and be pasted or wound on the surface of a heated object, and especially can be used for the ice prevention and removal of a compound material workpiece in an aircraft.

Description

technical field [0001] The invention relates to the technical field of aviation deicing, in particular to a composite braided electric heating film for anti-icing, an electric heating structure containing the composite braided electric heating film and its application in anti-icing. Background technique [0002] When an aircraft flies under icing weather conditions, supercooled water droplets (water droplets that exist in liquid form at a temperature lower than 0°C) in the cloud layer hit the surface, and icing will occur. Among them, the surface of wings and horizontal tail, vertical tail leading edge, engine inlet lip, air intake components (guide blades, supports, etc.), propeller blades, fairing cowls, windshields, hatches and other transparent parts and airspeed The surface of air data detection devices such as pipes, angle of attack, and temperature sensors are seriously icing. Ice on the surface of the aircraft will cause a large number of aerodynamic problems, manif...

AI Technical Summary

Problems solved by technology

This method has a very high degree of technical maturity. The anti-icing and de-icing systems of foreign civil aircraft basically adopt electric heating, but there are generally obvious weight gain (for example, only the de-icing system of the S-76 helicopter increases by 68-113kg), and the electrothermal conversion efficiency is relatively low. low level problem

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