The role and importance of elastic bars in railway tracks

The fastening parts of elastic fasteners are mainly elastic strips. Through the bending and deformation of the elastic strips, the buckling pressure acts on the rails, effectively ensuring long-term reliable connection between the rails, maintaining the integrity of the rails as much as possible, and preventing the rails from being transverse relative to the sleepers. and lateral movement to ensure normal track gauge, thereby ensuring the safety of rail vehicles. In addition, since the contact between the train wheels and the rails is rigid, vibration will inevitably occur, and the special elastic structure of the elastic bars can also absorb the impact energy generated when the vehicle passes by, achieving a shock-absorbing effect.

The elastic bars work under repeated and alternating stress, and are subject to various effects such as bending, torsion, fatigue and corrosion. They also bear high instantaneous impact loads when vehicles pass by, so the performance requirements for the elastic bars are very strict.

With the increase in the axle load of railway vehicles and the improvement of train operating speeds, as well as the development of urban rail transit and subways, elastic bars as a key link in track structures are also constantly developing, and their importance has attracted more and more attention from various countries.

China is a country with a changeable climate, different traffic conditions, and large regional differences. It needs elastic rods with different performance requirements to meet the requirements of different rail types and rail types. For example, on conventional lines, fastening pressure and good elasticity are required to meet the needs of heavy-duty and high-speed lines; in viaduct track seamless lines, in order to reduce the interaction between the rail and the bridge, the resistance of the fasteners is required Small, and the elastic rod is sufficient, that is, the steel bar is low enough to ensure that the pressure loss of the fastener caused by the compression of the cushion under the rail when the train passes is small and the fastener does not loosen.