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The role and importance of bullet bars in railway tracks
Jan 31, 2018

Railway rail is the part that supports the locomotive and locomotive direction, and the rail is fixed on the sleeper of the ballast by elastic fastener.

Elastic fasteners withhold article is mainly to play, it is calculated by the bending and twist deformation, buckle pressure effect on the orbit, effectively guarantee the reliable connection between rail for a long time, as far as possible to keep the integrity of the orbit and stop the rail lateral movement relative to the sleeper, ensure the normal track, to ensure the safety of the rail vehicle.

Also because of the train wheel and rail contact is a rigid contact, thus inevitably produces vibration, and play a special elastic structure makes it also has the absorption of impact energy produced when a vehicle goes by, to achieve the effect of shock absorption.

Play is working under alternating stress repeatedly, it under a variety of action such as bending, torsion and fatigue and corrosion, when vehicles through, even under high transient impact load, so to play a strict performance requirements.

With the increase of rolling stock axle load of railway transportation and the improvement of train speed, and the development of urban rail transit, the subway, playing as a key link in track structure of article also in unceasing development, its importance is becoming more and more concern for all countries.

China is a country with a large scale, and the climate, transportation conditions and regional differences are very large. It requires various kinds of elastic bars of different performance requirements to meet the requirements of different rail types.

If on the conventional line, need to buckle the pressure big, elastic good bullet, meet the need of heavy load, high-speed line;

In seamless line viaduct rail, to reduce rail and bridge interaction, for fastener resistance is small, and maintain enough flexibility, or maintain a low enough stiffness, to ensure the train through the buckle caused by rail pad under compression pressure loss is small, not loose fasteners.

Article is playing is a small works, but it is an important part in orbit, because of its high demand, about 7000 pieces per kilometer, its reliability is directly related to driving safety.