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Type WJ-8 Rail Fastening System

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Introduction
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.
Technical Support
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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