The railway fastener system is like the "invisible guard" of the track. It seems small, but it plays an irreplaceable and key role in ensuring the safe and smooth operation of the train. Through the exquisite structural design, it closely connects the rails, sleepers and other components, not only fixing the position of the rails, but also efficiently transmitting the train load, and buffering the vibration and impact generated by the train operation. It is the cornerstone of the stable operation of the railway track system.
Common railway fastener systems are mainly divided into spring bar type, buckle plate type and spring sheet type. They are suitable for different railway scenes due to their different structural and performance characteristics.
Spring clip fasteners are one of the most widely used types at present, represented by WJ-8 type and SKL series. Its core component, the spring clip, is made of high-strength spring steel. Through the unique arc design, it can generate strong buckling pressure to firmly fix the rails on the sleepers. In the field of high-speed railways, trains run at speeds of up to 350km/h. With excellent elasticity and high buckling pressure, spring-clip fasteners can effectively absorb high-frequency vibrations caused by high-speed trains, reduce mutual wear between rails and sleepers, and extend the service life of rails. On heavy-duty railways such as the Daqin Railway, facing freight trains with axle weights exceeding 30 tons, spring-clip fasteners can still work stably to ensure that the rails do not move under heavy load impact.
The structure of the buckle plate fastener is relatively simple, mainly consisting of a buckle plate, threaded spikes, spring washers, etc. The buckle plate directly buckles the rail through the threaded spikes, and the installation and removal operations are convenient. This type of fastener is suitable for conventional railways. In the construction of some branch railways or lines with high cost control requirements, the buckle plate fastener can meet the basic fastening requirements of the track with its low manufacturing cost and simple installation process, and can effectively reduce construction and maintenance costs.
The shrapnel fastener plays a role in some urban rail transit with its stable buckling pressure. For example, the Nabla shrapnel fastener developed in France uses a special elastic metal material for its shrapnel. Through a unique geometric design, it can provide uniform and stable fastening pressure between the rail and the sleeper. Under the working conditions of frequent starts and stops and frequent vibrations on the subway line, the shrapnel fastener can effectively reduce the lateral displacement of the rail, ensure the stability of the track structure, and reduce the operating noise and the impact on the urban environment.
As the railway moves towards high-speed roads, the fastener system is also constantly innovating. The introduction of intelligent monitoring technology provides a double guarantee for the safe operation of the fastener system. In the future, the railway fastener system will develop in the direction of being more lightweight, intelligent, and high-performance, and continue to escort the safe operation of the railway.