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.
WJ-8 Rail Fastening System Parts Details
| Serial number | Name | Quantity | Material | Mass or volume | Remarks |
| 1 | Spiral spike | 2 | High quality carbon steel or alloy steel | 1.50kg | The S2 type is generally used, and the S3 type is used when the height is greater than 15 mm. |
| 2 | Flat Washers | 2 | Q235-A | 0.138kg | |
| 3 | W1 type elastic clip | 2 | 60Si2MnA | 1.44kg | The general section adopts the W1 type, the single elastic rail clip buckle pressure is greater than 9kN, and the elastic stroke is 14mm. |
| X2 type elastic clip | 1.28 kg | The X2 type is used for the small resistance area. The single spring buckle has a pressure of 6kN and a stroke of 12mm. | |||
| 4 | WJ8 insulation block | 2 | Glass fiber reinforced nylon PA66 | 79.0cm3 | Type I, used in general locations. |
| 73.0cm3 | Type II, used at rail joints. | ||||
| 5 | WJ8 gauge baffle | 2 | Glass fiber reinforced nylon PA66 | 718cm3 | Normal installation No. 7, select different numbers according to the gauge adjustment. Joint gauge baffle at rail joint |
| WJ8 joint gauge baffle | |||||
| 6 | WJ8 rubber pad | 1 | Natural rubber or synthetic rubber | 140cm3 | Select one of them according to the specific requirements of the line resistance. The composite backing plate is formed by vulcanizing a 1.2 mm thick 1Cr18Ni9Ti stainless steel plate and rubber. Do not use reclaimed rubber |
| WJ8 composite pad | rubber | 110cm3 | |||
| stainless steel | 0.25kg | ||||
| 7 | WJ8 iron rail pad | 1 | QT450-10 | 6.80kg | |
| 8 | WJ8 iron rail pad under the rail pad | 1 | Thermoplastic elastomer (foaming pad) | 540cm3 | The static stiffness of the A-type pad is 30~40 kN/mm, which is suitable for the 250 km/h passenger dedicated line (considering freight transportation); |
| The static stiffness of the B-type pad is 20~26 kN/mm, which is suitable for the 350 km/h passenger dedicated line; the dynamic and static stiffness ratio is not more than 2.0. | |||||
| 9 | Pre-embedded casing D1 | 2 | Glass fiber reinforced nylon PA66 | 115cm3 | The pull-out resistance of the embedded bushing in the sleeper is not less than 60kN. |
| 10 | WJ8 under-rail fine-tuning pad | 1 | Polyethylene injection molding | 25cm3/mm | According to the specific situation |
| 11 | WJ8 iron rail pad down the high pad | 2 | Polyethylene injection molding | 720cm3/10mm | According to the specific situation |