Elastic Fastener (High-speed railway)

Elastic pads are used to buffer the high - speed vibrations and impacts generated when vehicles pass over the tracks between the rail and the concrete sleeper. They protect the roadbed and sleepers and provide electrical insulation for the signaling system. As they are exposed to the atmosphere for a long time, they should have good aging resistance, cold resistance, and heat resistance.

With the continuous increase in the operating speed of railways (the design standard for high - speed railways is 250 - 350 km/h, and even higher), ballastless tracks, due to their excellent comprehensive performance, are widely laid on high - speed railways and have become the development trend of modern railways. Elastic vibration - damping pads are key vibration - damping components. They provide the necessary elasticity for ballastless tracks, enable a more reasonable distribution of the load on the rail, and thus reduce the harm caused by in - vehicle vibrations.

At present, the products on the market are mainly produced by German (funded) enterprises. Domestic products have defects such as a large change rate of low - temperature static stiffness, a large ratio of dynamic to static stiffness, and poor durability. These defects increase the derailment coefficient of high - speed trains during operation and reduce the operational safety of trains.

The elastic pads developed by our company fully meet the technical requirements of high - speed railways, including GB/T 21527 - 2008 Railway applications - Elastic pads for fastening systems, TB/T 3307.8 - 2014 Technical specification for manufacturing of turnouts for high - speed railway - Part 8: Elastic rail pads, and TB/T 3395.5 - 2015 Fasteners for high - speed railway - Part 5: WJ - 8 fasteners.