FST type high torsion resistance vibration-damping fastener adopts rail suspension structure and wedge self-locking structure, which solves the problem of traditional suspension fasteners, and the vibration-damping effect reaches more than 10dB. At present it is the most mature application kind of high vibration-damping fastener in China.
1. Compared with the traditional plate rubber support block, it can effectively prevent the occurrence of rail side grinding at the bend, with large lateral rigidity and strong gauge keeping ability.
2. Strong vertical limit and rail smoothness: L-type rubber support block on the rail foot forms a buckling (similar to the buckling effect of elastic bar), which effectively prevents the occurrence of rail unevenness, realizing anti-loosening in high-twisting.
3. Anti-loosening safety design: the anti-loosening bolt locks the positioning block, preventing the positioning block from loosening due to train vibration during long-term operation, and eliminating the safety risks caused by the positioning wedge loosening or even pulling out.
4. The clamping force is controllable and stepless adjustable: through the positioning design of locking bolt, the clamping force of each set of fasteners is ensured by the adjustment gasket of different thickness, which can realize the adjustment of clamping force of any degree.
5. Convenient and quick installation: the tools used in construction and installation of anti-loose high-torque and high-damping fasteners are the same as those used in ordinary fasteners, without special tools (abandoning hydraulic tools weighing up to 25Kg), and the installation and maintenance are fast and convenient.
Project | Technical Indicators | |
Stiffness | 5-10KN/mm, and can be adjusted according to customer requirements | |
Installation Height | Loading height 32±1, and can be adjusted according to customer requirements | |
Fatigue Performance | 3 million times fatigue performance | After 3 million times of fatigue test, the change rate of static stiffness no more than 10%, the track gauge expansion no more than 6mm, and there are no damage or loosening of each part. |
2 million times fatigue performance | A single set of fasteners is subjected to vertical loading force (-10-+40) kN (“-” vertical upward tensile, "+" vertical downward compression). After 2 million times fatigue tests, the static stiffness change rate is no more than 10%, the longitudinal resistance change rate is no more than 20%. | |
Nail Hole Spacing | It can be adapted to different nail hole according to the requirements of design. | |
Amount of Rail Adjustment, mm | Gauge | No less than ±10 on one side (without gauge block) |
Rail Height | 0-+30 0-+30 | |
Vibration Damping Effect | Compared to ordinary elastic separate fastener, the falling hammer test effect is more than 10dB | |
Interface with Rail | It can be matched with 50kg/m rail, 60kg/m rail and all kinds of spring bars. | |
Slope of Rail Bottom | It can be set according to the requirements of rail bottom slope | |
Interface with Rail Sleeper | Applicable to all kinds of rail sleepers, and can be designed according to requirements | |
