High Speed WJ-8 Rail Fastening System
WJ-8 rail fastening system (also known as WJ-8 elastic fastener) is suitable for rails with a gauge of 1435 mm and a speed of 60 kg/m. The German passenger dedicated line fastener system's technical specifications led to the development of the WJ-8 rail fastening system, a ballastless track...
- Product Introduction
WJ-8 rail fastening system (also known as WJ-8 elastic fastener) is suitable for rails with a gauge of 1435 mm and a speed of 60 kg/m. The German passenger dedicated line fastener system's technical specifications led to the development of the WJ-8 rail fastening system, a ballastless track fastener system. The fastener system, which is an elastic non-separable fastener structure with rail pads, was created within the limitations of the original plate as well as the dimensions and location of the double-block ballastless track bearing groove.
Application scope:
The WJ-8 elastic rail clamp fastener system is appropriate for CRTSII ballless tracks with an axle load of 170 KN (assuming a 10% increase in axle load) and passenger dedicated lines with a maximum axle speed of 350 km/h. The WJ-8 fastener system is generally in good shape and has been used in numerous locations.
| Delivery Time | Within 20-40 working days, depending on the quantities |
| Loading Port | Shanghai, Tianjin, Qingdao |
| Offer Ability | 5000+pcs/Per Month |
| Packaging Details | Each woven bag is less than 25KG. Fumigation-free pallet. Customers can specify the method |
Fastener Composition
●WJ-8 fasteners are composed of spiral spikes, flat washers, spring bars, insulating gauge blocks, gauge baffles, rail pads, iron pads, elastic pads under the iron pads, and embedded sleeves. To meet the needs of height adjustment, they also include rail fine-tuning pads and iron pad height adjustment pads.
●There are two types of spring bars, namely W1 spring bars (diameter 14 mm) and X2 spring bars (diameter 13 mm). X2 spring bars are used when small resistance fasteners are used on bridges.
●There are two types of gauge baffles, namely gauge baffles for general sections and joint gauge baffles for clamping plates.
●Elastic pads under iron pads are divided into two types, A and B (both with a thickness of 12 mm). Class A elastic pads are used for high-speed railways that also consider freight, and Class B elastic pads are used for high-speed railways that only run passenger cars.
●Spiral spikes are divided into two types: s2 and s3. When the fastener is installed in a normal state or the rail height adjustment is not greater than 15mm, the s2 type spiral spike is used, and when the height adjustment is greater than 15mm, the s3 type spiral spike is used.
●Two types of rail pads:
① WJ-8A type fasteners use Class A elastic pads (static stiffness of 35±5kN/mm), which are suitable for passenger dedicated line operation conditions with a maximum speed of 250km/h for both freight and cargo;
② WJ-8B type fasteners use Class B elastic pads (static stiffness of 23±3kN/mm), which are suitable for laying double-block ballastless tracks with a maximum speed of 350km/h for passenger dedicated lines;
③ WJ-8C type fasteners use Class B elastic pads (static stiffness of 23±3kN/mm), which are suitable for laying CRTS II type track plates with a maximum speed of 350km/h for passenger dedicated lines.
Main Technical Requirements
① A certain amount of protective grease should be ensured in the embedded casing, and the grease performance should comply with relevant regulations.
② Joint gauge baffles and insulating gauge blocks should be used at the clamping plate.
③ Spring bar installation standard: The front end lower jaw of the middle part of the spring bar should not contact the insulating gauge block, and the gap between the two should not be greater than 0.5mm or when using a torque wrench to detect the torque of the spiral spike, the Wl type spring bar is 130~170N·m, and the X2 type spring bar is 90~120N·m.
④ Spring bar maintenance standard: The front end lower jaw of the middle part of the spring bar should not contact the insulating gauge block, and the gap between the two should not be greater than 1mm; or when using a torque wrench to detect the torque of the spiral spike, the W1 type spring bar is 130~170N·m, and the X2 type spring bar is 90~120N·m.
⑤ The gauge baffle should be close to the shoulder of the bearing rail groove, and the gap should not be greater than 1mm; the sum of the gaps between the rail and the insulating gauge block, and the insulating gauge block and the iron pad shoulder should not be greater than 1mm.
⑥ Rail left and right position adjustment: ±5mm.
⑦ Height adjustment: 4~+26mm.
Product Specifications
|
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 |
Technical Requirements
|
Fastener type |
WJ-8 type fastener |
||
|
Taxonomy |
With iron rail pad (thickness 16mm) |
||
|
Withstand lateral force |
Sustained by concrete shoulders |
||
|
Connection with the foundation |
Embedded plastic casing |
||
|
Embedded member pull-out resistance |
Not less than 60kN |
||
|
Buckle |
Types of |
W1 type |
Type X2 |
|
|
Buckle pressure |
>9kN |
6kN |
|
|
Strike |
14mm |
12mm |
|
|
Fastening method |
Bolt fastening |
|
|
|
Tightening torque |
About 160Nm |
About 110Nm |
|
Rail longitudinal resistance |
>9kN |
4kN |
|
|
iron rail pad fastening torque |
-- |
||
|
Elastic cushion |
Setting |
A cushion layer (rubber pad or composite rubber pad) is arranged under the rail, and an elastic cushion layer (thermoplastic elastomer foaming pad) is arranged under the iron rail pad plate. |
|
|
|
size |
Class A |
Class B |
|
|
|
Under rail rubber pad: 175 × 156 × 4 |
|
|
|
|
rail pad under the iron rail pad 285×150×12 |
|
|
Under-arc cushion stiffness |
>300 kN/mm |
||
|
Sub-layer cushion stiffness |
30～40kN/mm |
20~30kN/mm |
|
|
Rail height |
High rail surface |
208 |
|
|
|
Adjustment amount |
30mm |
|
|
|
Adjustment method |
By adjusting the height of the pad between the rail and the iron rail pad to achieve 10mm adjustment; padding the pad on the sleeper bearing groove to achieve 20mm adjustment. The filling pad can be adjusted steplessly. |
|
|
gauge |
Adjustment amount |
±10mm |
|
|
|
Adjustment method |
It is realized by replacing the gauge baffles of different specifications. |
|
|
|
Adjustment level |
Level adjustment, level 1mm |
|
|
Rail joint treatment |
In general, when the general gauge adjustment amount is large, replace the joint gauge baffle. |
||
|
Applicable to ballastless track |
Armless track structure |
||
|
Drawing number and standard |
Research Line 0604, Science and Technology Base [2007] 207 |
||
|
Application condition |
250km/h |
350km/h passenger line |
|
Comparison Of WJ-7 And WJ-8 Rail Fastening System
|
Serial number |
project |
Performance |
|
|
|
|
WJ-7 fastener |
WJ-8 type fastener |
|
1 |
Adapt to rail type |
China 60kg/m rail |
|
|
2 |
gauge |
1435mm |
|
|
3 |
Track bottom slope |
A 1:40 rail bottom slope is placed on the iron rail pad. |
A 1:40 rail bottom slope is placed on the sleeper or track board. |
|
4 |
Rail longitudinal resistance |
In general, each group of fasteners is larger than 9kN; for small resistance sections, each group of fasteners is about 4kN. |
|
|
5 |
System flexibility |
The static stiffness of the A-type rail pad is 30~40kN/mm, which is suitable for the 250km/h passenger dedicated line (considering freight transportation); the static stiffness of the B-type rail pad is 20~30kN/mm, which is suitable for the 350km/h passenger line; |
|
|
6 |
Dynamic and static stiffness ratio |
Not more than 2.0. |
Not more than 1.5. |
|
7 |
Fatigue performance |
The fastener system is tested according to EN 13146-4 when the height is increased by 30mm. After 3 million load cycles, the parts are not damaged, the gauge length is less than 6mm, and the buckle pressure, the longitudinal resistance of the rail and the static stiffness of the rail joint meet the following requirements. : buckle pressure change ≤ 20%; rail longitudinal resistance change ≤ 20%; node static stiffness change ≤ 25%. |
|
|
8 |
Insulation resistance |
The fastener system is tested according to EN13146-5. The insulation resistance between the two rails is greater than 3 Ω·km, and meets the requirements of the track circuit for its insulation resistance. |
|
|
9 |
Harsh environmental conditions |
The fastener system can be successfully disassembled with a manual disassembly tool after the 300h salt spray test described in EN13146-6. |
|
|
10 |
Rail left and right position adjustment |
The adjustment of the left and right position of the single-strand rail: -6 ~ +6mm; gauge adjustment: -12 ~ +12mm, continuous stepless adjustment. |
The adjustment of the left and right position of the single-strand rail: -5 to +5 mm; the gauge adjustment: -10 to +10 mm, and the adjustment level is 1 mm. |
|
11 |
Rail height position adjustment |
Rail height adjustment position: 30mm; |
|
|
12 |
Buckle pressure and range |
Commonly used elastic rail clips (W1 type): single elastic rail clip buckle pressure is greater than 9kN, and the elastic stroke is 14mm; small resistance elastic rail clip (X2 type): single elastic rail clip buckle pressure is 6kN, and the elastic stroke is 12mm. |
|
|
13 |
Pull-out resistance of embedded bushings in sleepers |
Not less than 100kN. |
Not less than 60kN. |
Product Quality
We understand that product quality is the foundation of long-term cooperation. As our products are used in the railway industry, where safety and reliability are critical, quality control is never compromised. At Lanling, from raw material inspection, forging, heat treatment to performance testing, every product undergoes strict control to ensure that it fully complies with railway industry standards before delivery.
Packaging & Transportation
Lanling provides secure and efficient packaging and transportation for all orders, using standard export packaging with steel straps and reinforced pallets, along with anti-rust protection for sea shipments. Customized packaging is also available on request, and flexible logistics solutions ensure safe delivery for bulk orders and international shipments worldwide.
Hot Tags: high speed wj-8 rail fastening system, China high speed wj-8 rail fastening system manufacturers, suppliers, factory, bolt for rail fastening, fastening performance for railway track, nut for rail fastening, performance for rail fastening, railway fastening tool, track fastening quality
