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Help CenterType WJ-8 RAI FASTENING SYSTEM(Rail Fastener) for High-Speed Railway Track Fixing
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Type WJ-8 Rail Fastening System is a ballastless track fastener system developed to meet the technical requirements of the passenger dedicated line fastener system and to adapt to the laying of the existing shoulder-free ballastless track in Germany.
Type WJ-8 Rail Fastening System (also called Type WJ-8 elastic fastener), which is composed of screw spikes, flat washers, elastic clips, insulating gauge blocks, gauge baffles, under-rail pads, iron pads, elastic pads under iron pads and embedded dowels. In addition, in order to adjust the height of the steel rail, it also includes a fine-tuning pad under the rail and a lower-elevating pad of the iron backing plate.
Adjustment amount of left and right position of single strand rail: -5~+5mm;
Gauge adjustment amount: -10~+10mm, the adjustment level is 1mm.
The height adjustment of the rail is -4~+26mm, and the adjustment level is 1mm.
Design Parameter for Type WJ-8 Rail Fastening System
No. | Item | Performance |
1 | Suitable Rail type | Chinese 60kg/m steel rail |
2 | Gauge | 1435mm |
3 | Rail bottom slope | sleeper or track slab with 1:40 rail bottom slope |
4 | Longitudinal resistance of rail | In general sections, the longitudinal resistance of each group of fastener rails is greater than 9 KN; in low resistance sections, the longitudinal resistance of each group of fastener rails is about 4 KN. |
5 | System flexibility | The static stiffness of type A pad is 30~40kN/mm, which is suitable for 250km/h passenger dedicated line (taking into account freight); the stiffness of type B pad is 20~26kN/mm, which is suitable for 350km/h passenger dedicated line; the ratio of dynamic and static stiffness is not more than 2.0 |
6 | Dynamic and static stiffness ratio | ≤1.5 |
7 | Fatigue performance | The fastener system has no damage to all parts after 3 million load cycles, the gauge expansion is less than 6mm, and the buckling force change is ≤20%; the rail longitudinal resistance change is ≤20%; the joint static stiffness change is ≤25% |
8 | Insulation resistance | The fastener system is tested in accordance with EN13146-5, and the insulation resistance between the two rails is greater than 3Ωkm, and it meets the requirements for the insulation resistance of the rail circuit. |
9 | Harsh environmental conditions | The fastener system can be removed smoothly after the 300h salt spray test described in EN13146-5. |
10 | Adjustment amount of rail left and right position | Adjustment amount of left and right position of single strand rail: -5~+5mm; Gauge adjustment amount: -10~+10mm, the adjustment level is 1mm |
11 | Adjustment amount of rail height | Adjustable amount of rail height: 30mm |
12 | Buckle force and stroke | Commonly used elastic clips (W1 type): single elastic clip buckle pressure is greater than: 9kN, elastic range 14mm; small resistance elastic clip (X2 type); single elastic clip buckle pressure 6kN, elastic range 12mm |
13 | Pull-out resistance of embedded dowel in sleeper | ≤60kN |
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