Type WJ-7 Railway Track Fastening Systems, Rail Fasteners for High-Speed Railroad
WJ-7 Railroad Rail Fastening Systems(WJ-7 Rail Fasteners) is a type of ballastless track fastener system developed to meet the technical requirements of the passenger dedicated line fastener system for laying all kinds of non-shoulderless ballastless tracks. It is based on the original WJ-1 and WJ-2 Track Fastening Systems optimized on the basis of ballastless track fastener system.
Type WJ-7 Track Fastening Systems for High-Speed Railroad can be applied to sleeper embedded type (double-piece sleeper and long sleeper) and slab ballastless track on bridges, tunnels and subgrades.
The key technologies that need to be solved the problems for the ballastless track fastener system of the passenger dedicated line are high elasticity, high insulation, strong structural versatility, less attenuation on the fastening force of elastic clip and high fatigue strength, reliable connection with the foundation, and large adjustment of the height of the rail and the left and right positions. The following optimization and improvement have been made in the research of the WJ-7 type track fastener system.
1) Improve the versatility of fastener structure;
2) Improve the insulation performance of the fastener system;
3) Reduce the attenuation of the spring bar buckle pressure and increase its fatigue strength;
4) Improve the reliability of the connection between the fastener system and the foundation;
5) Reduce the stiffness of the fastener system;
6) Improve the reliability of fixing the T-bolt in the iron base plate.
