Novel steel-aluminum composite contact rail expansion joint

Abstract

The invention discloses a novel steel-aluminum composite contact rail expansion joint, comprising a sliding rail structure which are formed by sequentially connecting rail webs of a left sliding rail,a middle sliding rail and a right sliding rail through a fishtail clamping plate, wherein the fishtail clamping plate is slidably connected with the rail web of the left sliding rail and the rail webof the right sliding rail, and is fixedly connected with the rail web of the middle sliding rail; and main soft copper bands are arranged on rail bottoms of the left sliding rail, the right sliding rail and the middle sliding rail. Furthermore, due to the adoption of copper-aluminum transition plates, the main soft copper bands, pressing plates, auxiliary soft copper bands, partition plates, limiting sleeves, connecting transition blocks and so on, the defect of the expansion joint in the curve performance of the line is solved, and the condition that the mechanical connection, electrical performance and compensation ability can meet the requirements can be ensured. The needs of lateral current receiving can be met and the requirement on boundary can be reduced; and a current collecting shoe of the train can smoothly scratch across the current receiving surface of the expansion joint to ensure the current continuing smoothness of the contact rail.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a novel steel-aluminum composite contact rail expansion joint suitable for straddle monorail and medium-low speed magnetic levitation for lateral flow. Background technique [0002] In the steel-aluminum composite contact rail power supply system of straddle-type monorail and medium-low speed magnetic levitation rail transit, the function of the expansion joint is to compensate the length change of the contact rail due to thermal expansion and contraction and ensure a good current connection. It is an urban rail transit steel An important part of the aluminum composite contact rail power supply system. [0003] With the rapid development of urban rail transit, the steel-aluminum composite contact rail and its accessories have been continuously improved, and the form of the expansion joint as the main component has also begun to diversify. However, as the use time incr...

AI Technical Summary

Problems solved by technology

However, as the use time increases, defects such as large initial sliding force, poor current continuity performance, and increased transition resistance are generally exposed.

[0004] The upper and lower contact expansion joints currently used cannot fully meet the needs of the lateral flow form, and the structure is more complex and costly, requiring complex machining and welding. Sliding resistance increases when the rail expands with heat and contracts with cold

In particular, expansion joints arranged on bends with small curvature in the lateral contact mode cannot guarantee good adjustment and compensation capabilities under the condition that their mechanical connection and electrical performance meet the requirements.

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