Aluminum-coated steel-core heatproof aluminum alloy twisted wire with self damping, low loss and high strength

Abstract

The invention provides a self-damping, low-loss, high-strength aluminum-clad steel-cored heat-resistant aluminum alloy stranded wire, which effectively reduces the weight per unit length of the wire without changing the outer diameter of the original wire and increasing the wind load of the wire. Self-weight specific load. It includes an inner core wire core and an outer stranded layer, and is characterized in that: the outer stranded layer specifically includes an inner layer conductor and an outer layer conductor, and the inner core wire is specifically a bearing formed by concentrically twisting aluminum-clad steel wires. A force-reinforcing core, concentrically and tightly twisting a layer of the inner conductor layer composed of several drawn-out circular cross-section aluminum wire strands outside the force-bearing reinforcing core, and concentrically twisting at least one layer on the inner conductor layer The outer conductor layer is composed of several trapezoidal cross-section aluminum wire strands.

Description

technical field [0001] The invention relates to the technical field of wire structures, in particular to a self-damping low-loss high-strength aluminum-clad steel-core heat-resistant aluminum alloy stranded wire. Background technique [0002] With the sustained and rapid development of my country's national economy, the demand for electricity has also increased sharply. Power transmission lines are required to develop in the direction of high current and ultra-high voltage, which requires increasing the transmission capacity of wires. With the continuous strengthening of the transmission network construction in our country, the continuous extension of the Three Gorges transmission project line, west-to-east power transmission, north-south mutual supply, national networking, and the transformation of old lines that have been in operation for decades under the new situation. Based on this development trend, new types of conductors are required to have capacity-increasing func...

AI Technical Summary

Problems solved by technology

[0003] Vibration of overhead conductors caused by breeze is very common, and frequent breeze vibrations can easily cause conductor fatigue and broken strands, and even the entire conductor may be broken in severe cases. Therefore, new conductors must have strong seismic performance

[0004] In AC power transmission projects, the charge is always concentrated on the surface of the conductor, and the current density on the surface of the conductor is larger than that at the center, which is commonly referred to as the "skin effect". Therefore, the actual AC resistance of the wire is higher than the calculated DC resistance of the wire. , then the power loss of conventional twisted wires continues to increase during AC power transmission, so there is an urgent need for a wire that not only satisfies capacity increase and shock resistance, but also has the function of reducing energy consumption.

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