High Speed Railway Fastening System Shoulderless Elastic Fastening Ballastless Track
- Category： Track accessories
- Model: WJ-7, WJ-8, W300-1, SFC
- Applicable rail: 50~60kg/m
- Track type: ballastless track
- Speed: >350km/h
High Speed Railway Fastening System Shoulderless Elastic Fastening Ballastless Track
1. Brief introduction:
Rail fasteners are critical components that securely connect steel rails to their supporting structures, ensuring stable installation on sleepers or base plates.
- WJ Series – Ideal for high-speed ballastless tracks
- Elastic Strip Series – Suitable for conventional-speed ballasted tracks
- DT/FC Series – Perfect for urban rail transit systems
These systems differ in shoulder design, clamping force, and elasticity, making them highly adaptable to various operating speeds, axle loads, and track foundation conditions.
2. Core functions of rail fastenings:
- Maintain standard track gauge and alignment, with precise adjustment for any deviations.
- Provide sufficient longitudinal resistance to avoid rail creep during long-term operation and excessive gap expansion in case of rail fracture.
- Offer effective elasticity to absorb vibration and impact, minimizing damage to rails and supporting structures.
- Enhance the overall rigidity of the track structure to prevent track buckling caused by temperature variations or heavy axle loads.
- Guarantee reliable track insulation, critical for the stable operation of track circuits.
- Allow vertical rail adjustment to compensate for construction tolerances and operational settlement.
3. High speed railway fastening parameters table:
|
Fastening model |
Structure type |
Core parameters |
Application |
|
Type WJ-7 |
Shoulderless Separated Elastic Type |
Elastic clip clamping force: 4-5 kN (bridge sections) / 8-11 kN (tunnel sections); Vertical adjustment range: ±20 mm |
CRTS Ⅰ/Ⅱ slab track, bi-block sleepers, 350 km/h high-speed railways |
|
Type WJ-8 |
Shouldered Non-separated Elastic Type |
Lateral force borne by track slab shoulders; Compatible with CRTS Ⅱ/Ⅲ slab track |
350 km/h high-speed railway slab ballastless track |
|
Type W300-1 |
Shoulderless Separated Elastic Type |
Double-layer elastic pads; Vertical adjustment range: ±10 mm |
Bi-block ballastless track, slab ballastless track |
|
Type SFC |
Shoulderless Separated Elastic Type |
Pre-embedded iron seats + elastic clips; Gauge adjustment range: -8~+4 mm |
Tunnel/viaduct ballastless track |
4. Main Structure of WJ-7 high speed fastening system:
|
S/N |
Part Name |
Material |
Qty |
|
1 |
T type bolt |
Carbon steel |
2 |
|
2 |
Hexagon nut M24 |
Carbon steel |
2 |
|
3 |
Flat washer |
Carbon steel |
2 |
|
4 |
Elastic strip |
Spring steel |
2 |
|
5 |
Insulation block |
PA66+30% GF |
2 |
|
6 |
Iron base plate |
Ductile iron |
1 |
|
7 |
Buffer pad under base plate |
Rubber plastic |
1 |
|
8 |
Rubber plate |
Rubber/Stainless steel |
1 |
|
9 |
Anchor bolt B1 |
Carbon steel |
2 |
|
10 |
Heavy duty spring washer |
Spring steel |
2 |
|
11 |
Flat pad |
Ductile iron |
2 |
|
12 |
Embedded sleeve |
PA66+30%GF |
2 |
|
13 |
Adjust rail pad |
PE |
/ |
|
14 |
Adjust plate under iron base plate |
Rubber plastic |
/ |
5. Main structure of WJ-8 high speed fastening system:
|
S/N |
Part Name |
Material |
Qty |
|
1 |
Screw spike |
Carbon steel or stainless steel |
2 |
|
2 |
W1/X2 Elastic spring |
Stainless steel |
2 |
|
3 |
Electrical insulation block |
PA66+30%GF |
2 |
|
4 |
Gauge block |
PA66+30%GF |
2 |
|
5 |
Rubber pad |
Rubber |
1 |
|
6 |
Iron base plate |
Ductile iron |
1 |
|
7 |
Elastic pad under iron base plate |
Elastic material |
1 |
|
8 |
Embedded sleeve D1 |
PA66+30%GF |
2 |
|
9 |
Flat washer |
Carbon steel |
2 |
|
10 |
Adjust pad under rail |
PE |
/ |
|
11 |
Adjust pad under iron base plate |
HDPE |
/ |
