Special high-toughness carbon fiber composite core rod for power transmission wire

Abstract

The invention discloses a special high-toughness carbon fiber composite core rod for a power transmission wire, and belongs to the technical field of power transmission line wires. The composite material is prepared from the following raw materials in parts by weight: 35-42 parts of polyacrylonitrile-based carbon fibers, 5-10 parts of glass fibers, 7-15 parts of sisal fibers, 18-24 parts of epoxyresin, 9-12 parts of a curing agent, 1.5-2 parts of liquid silicone rubber, 2.5-6 parts of filler, 1.2-1.8 parts of a coupling agent and 250-270 parts of styrene. The surface is round, bright and clean, smooth, consistent in color and luster and free of defects, the tensile strength is 2673 MPa-2708 MPa, the elastic modulus is 140 GPa-151 GPa, the core rod is wound on a barrel with the diameter of55 D by one circle at the winding speed not larger than 3 r / min, and the core rod does not crack or break. A 360-degree torsion test shows that the surface layer does not crack, and the tensile strength after torsion reaches 2567 MPa or above. A tensile strength test at a high temperature of 160 DEG C shows that the tensile strength is 2441-2455 Mpa.

Description

technical field [0001] The invention relates to the technical field of transmission line conductors, in particular to a high-toughness carbon fiber composite mandrel specially used for transmission conductors. Background technique [0002] The carbon fiber composite core conductor is made of a composite material core instead of the steel core in the traditional steel-cored aluminum stranded wire. It is a new concept of conductor for overhead transmission lines and an innovative application of high-performance composite materials in transmission conductors. The advanced composite material core wire has excellent properties such as high strength, corrosion resistance, high conductivity, large current carrying capacity, small linear expansion coefficient, small sag, light weight, and long service life, which can effectively meet the requirements of energy saving, safety, and safety in the field of power transmission and transformation. Higher requirements for environmental prot...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned mandrel is brittle and has poor toughness. During long-term use, it is easy to crack or break, which seriously affects the safe operation of the transmission line.

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