DC high-voltage aluminum alloy cable for magnetic suspension system

Abstract

The invention discloses a DC high-voltage aluminum alloy cable for a magnetic suspension system. An outer side of an aluminum alloy conductor is orderly coated with a semi-conductive shielding tape, across-linked polyethylene insulation layer, a tinned copper wire braided shielding layer, an aluminum alloy band interlocking metal sheath layer and a halogen-free low-smoke polyolefin outer sheath.The aluminum alloy conductor is formed by pressing and twisting aluminum alloy wires, firstly a single aluminum alloy wire is drawn into a trapezoidal single wire by a trapezoidal drawing die, an aluminum alloy single wire of an innermost layer is round, the outer layer of the round single wire is coated with the trapezoidal single wire to be twisted, the switching directions of different layers are opposite, and all layers are pressed by a polycrystalline mold. The conductor of the invention is subjected to the layered pressing, the number of packed filling cores is increased, and the moisture is prevented from entering the inside of the conductor to reduce the service life of the cable. A wrapping form is employed by a semi-conductive layer, the structure is simple, and the performance is reliable. The insulating layer is extruded by a thick wall, the extrusion and cross-linking are carried out at the same time, the insulating layer is polluted and dampened during a production process to cause the cable breakdown is prevented, and therefore, the service life of the cable is improved.

Description

technical field [0001] The invention relates to the technical field of a high-voltage power supply system used in a levitation system in maglev traffic, in particular to a DC high-voltage aluminum alloy cable for a maglev system. Background technique [0002] At present, the countries that have conducted research on maglev trains in the world are mainly Germany, Japan, the United Kingdom, Canada, the United States, the former Soviet Union and China. The United States and the former Soviet Union gave up their research programs in the 1970s and 1980s, but the United States recently started a research program again. Britain only began to study maglev trains in 1973, but it was one of the first countries to put maglev trains into commercial operation. [0003] Germany began to study maglev trains in 1968. At present, Germany's technology in the research of conventional maglev trains has matured. [0004] Japan began to study the conventional maglev train in 1962, and in 1982, ...

AI Technical Summary

Problems solved by technology

However, the investment of about 30 kilometers in the Shanghai Pudong section is 100 billion yuan, and the cable price accounts for a relatively large proportion, making it unaffordable for investors.

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