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Basic Requirements of Rail Fasteners
Aug 16, 2018

Basic requirements of rail fasteners for railway track

(1) strong ability of maintaining gauge.The correct gauge is the most basic condition to ensure the safety of high-speed running. The track frame composed of rail and sleeper is completely connected by rail coupler. It must ensure the stability of the frame geometry features, that is, keep the gauge firmly and prevent the rail tilting and the gauge expanding.At the same time.The fastener should ensure the bending and torsion stiffness of the rail frame, so that the rail is in an accurate position.

(2) sufficient resistance against climbing.The fastener must have enough pressure to make the resistance between the rail and the sleeper larger than the resistance rail frame between the sleeper and the ballast bed.However, the buckling pressure of the fastener must be moderate, and excessive buckling pressure will make the cushion elastic decline and damage the fastener.At the same time: fasteners should also have a good performance of maintaining buckle pressure.

(3) good vibration damping performance.When the train passes through the pad is compressed, the elastic strip or shrapnel shall be sufficient to fasten the rail;After the train passes, the mat plate returns to its original shape.

(4) high accuracy and reliability of parts.All parts of the fastener should have sufficient strength and performance.No fatigue damage and significant residual deformation occurred in the parts of the coupler within the designed service life cycle;

(5) simple structure and small maintenance workload.The maintenance and maintenance of the railway track structure of the passenger dedicated line can only be carried out during the blocking period, and the fasteners should be simple in structure. 

(6) good insulation performance.To ensure the absolute safety of driving;Rail coupler should have good insulation performance to ensure the normal operation of track circuit.

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