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2021-02-09
  • By: Kingrail Parts

The function of railway clips in railway turnouts

Railway is now a very common means of transportation in the world. In order to meet market demand, the running speed of trains is constantly increasing. As an important part of railway turnouts, elastic rail clips also play a very important role in the entire structure. Railway clips produce buckling force on the track through the bending and distortion of the rail clips, which effectively guarantees the reliable connection between the rails for a long time, maintains the integrity of the track as much as possible, prevents the rail from moving vertically and horizontally relative to the sleeper, and ensures that the rail The distance is normal to ensure the safety of rail vehicles.

Since the train wheels and steel rails are in rigid contact, vibration is unavoidable. The special elastic structure of railway clips also allows them to absorb the impact energy generated when vehicles pass by, and achieve the effect of shock absorption. Railway clips work under repeated alternating stresses. They bear various effects such as bending, torsion, fatigue and corrosion. When vehicles pass, they also bear high instantaneous impact loads. Therefore, the performance requirements of railway clips are very strict. . On conventional lines, rail clips with high buckling pressure and good elasticity are required to meet the needs of heavy-duty and high-speed lines; while in the viaduct track seamless line, in order to reduce the interaction force between the rail and the bridge, fastener resistance is required It is small and ensures that the railway clips have sufficient elasticity, that is, to ensure that the railway clips have a sufficiently low stiffness to ensure that the buckle pressure loss caused by the compression of the under-rail cushion when the train passes is small, and the rail fastening system does not loosen.

Although railway clips are small railway parts, they are an important part of the track. Because of their high demand, about 7,000 pieces per kilometer, their reliability is directly related to the safety of driving. When railway clips work, they mainly use the bending deformation performance of the material. The processing is relatively simple and the cost is often low. However, due to the opening for bolt fastening, stress concentration is likely to occur in this part, and the large surface bending moment is precisely the weakening of the section. 

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