Rail Pad Application in 7 Type Railway Fastener Systems

High-speed railway: High-elastic rail pads can evenly distribute the train wheel load, prevent local collapse of sleepers, and extend the service life of ballastless track plates.

Conventional railway: For example, in mixed passenger and freight lines, insulated rail pads on steel or concrete sleepers can prevent rail current leakage and ensure the stability of the signal system.

Urban rail transit: For example, in the steel spring floating plate track system in underground tunnels, the pads and springs are used in combination to reduce the transmission of vibration to ground buildings.

Special railways: For example, heavy-load trains (axle weight exceeding 30 tons) in open-pit mines use metal pads, which are matched with wooden or concrete sleepers to effectively resist impact and wear during ore transportation.

SKL clip railway fastener system: In the SKL system, Rail Pad is made of multiple materials, most commonly polyurethane or rubber. For heavy-duty railway trains with an axle load of more than 30 tons, the high-strength polyurethane pad has a load capacity of over 300kN. Together with the buckle pressure of the spring clip, it evenly distributes the huge load to the sleepers, effectively preventing rail displacement and reducing stress concentration damage to the sleepers.

Fast Rail Fastener System: The Fast system uses spring steel clips and insulated fixing pins to work together. Rail Pad is placed between the rail and the sleeper and is made of rubber, polyurethane or EVA. It plays a significant role in shock absorption, insulation and sleeper protection. It can absorb most of the impact energy, reduce sleeper vibration, prevent current leakage, and evenly distribute the load. It works closely with other components of the system to ensure that the rails are stable, the track gauge is maintained, and the railway track operates safely and efficiently.

Fist railway fastener system: The Fist system was first developed in Sweden and is widely used on railways in many countries. The Rail Pad in the system also has the functions of shock absorption, insulation and sleeper protection. By absorbing impact energy, preventing current leakage, and dispersing loads, it is manufactured in conjunction with components such as spring steel clips in accordance with ISO 9001 standards to ensure the stability of the rails and prevent the longitudinal and lateral movement of the rails relative to the sleepers, providing reliable protection for railway operations.

Nabla Railway Fastener System: The Nabla system consists of elastic clips and connecting plates and is widely used on railways in many places around the world. Rail Pads are usually configured with 2 per sleeper and are mostly made of rubber, polyurethane or EVA. In terms of shock absorption, it can absorb more than 70% of the impact energy of train operation, reduce the vibration acceleration of the sleeper by 30%, and reduce vibration. In terms of insulation performance, it can prevent current leakage and ensure the stability of track circuit signals. At the same time, it disperses the rail load to the sleeper, prolongs the life of the sleeper, and cooperates with the elastic clip to maintain the track gauge and prevent rail displacement.

E-clip railway fastener system: In the E-clip system, Rail Pad provides elastic support for the rails, absorbs vibration and impact generated by train operation, and reduces damage to the sleepers. Its insulation performance helps maintain the stability of track circuit signals and avoid signal interference. Rail pads work with E-clip and other components to keep the rails in accurate position, ensure constant track gauge, adapt to different railway operating conditions, and ensure safe and stable railway operations.

KPO Railway Fastener System: KPO system is a clamp-type fastening system suitable for crane rails, heavy-load railways and other scenarios. Each sleeper corresponds to 2 Rail Pads, made of rubber, polyurethane or EVA. It can effectively absorb impact energy, prevent current leakage and protect the sleepers. Together with KPO clamps, iron pads, bolts, etc., it ensures that the rails are firmly fixed on the sleepers, withstands the huge pressure of heavy-load transportation, and maintains the stable operation of the track system.

WJ type fastener system (taking WJ-7 as an example): WJ-7 type fastener system is used for high-speed rail ballastless track. Rail Pad is divided into two categories: A and B. Category A is suitable for passenger dedicated lines that also take freight into consideration, and category B is used for pure passenger dedicated lines. Rubber pads are laid on general sections, and composite pads may be used on bridges due to special environments. These pads work together with T-bolts, iron pads, etc. When the train is running, they buffer the impact through elastic deformation, control the vertical displacement of the rail within a reasonable range, meet the stringent requirements of high-speed trains for track smoothness, and ensure the safety and stability of high-speed trains.