Products

DESCRIPTION

Basic Info.

Product Description

Core function
Mechanical transfer and buffering
The railway pad, as a key force transmission component between the rail and the sleeper, can effectively disperse the contact pressure between the wheel-rail. Measured data show that the standard type pad can reduce the concentrated load on the rail head by 40-50%, keeping the pressure borne by the sleeper within a safe range of 3-5 mpa.
2. Vibration energy management
Due to the viscoelastic properties of polymer materials, rubber pads can absorb approximately 30% of the wheel-rail impact energy. In the application of high-speed railways, the combination with the double-layer vibration damping structure can reduce the vibration acceleration of the track by more than 15dB.
3. Orbital geometric adjustment
Pad plates of different thickness specifications (2-12mm) can achieve fine-tuning of the rail surface elevation. Combined with wedge-shaped pad plates (slope 1:40), it can effectively correct the horizontal deviation of the track with an accuracy of ±0.3mm.

Application scenarios
1. High-speed railway system
Adopt low-stiffness pads (static stiffness 40-60kN/mm)
The dynamic stiffness change rate is required to be ≤15%
Polyurethane-based composite pads are used in lines such as the Beijing-Tianjin Intercity Railway, with a service life of 8 to 10 years
2. Heavy-duty transportation routes
High-load-bearing pad (compressive strength ≥25MPa)
The special pad for the Daqin Line contains a steel fiber reinforced layer
Wear resistance index: The thickness loss after a 200Mt throughput is less than 1mm
3. Urban rail transit
Fireproof pad (oxygen index ≥32%)
The pads used in subway tunnels must pass the EN45545-2 fire protection certification
The Shanghai Metro Line 14 adopts ceramicized silicone rubber pads

Special environment application
High-cold pad: Maintains elasticity at -60ºC (Harbin-Dalian High-Speed Railway)
Oil-resistant gasket: The expansion rate of ASTM No.1 oil is less than 5%
Conductive pad: Volume resistivity 10³-10Ω·cm

Technological evolution trend
1. Intelligent monitoring type pad
Embed the FBG optical fiber sensor to monitor the pressure distribution in real time
The trial plate of the Beijing-Xiong 'an Intercity Railway integrates dual parameter monitoring of temperature and strain
2. Innovation in environmentally friendly materials
The content of recycled rubber has been raised to 50% (EU TRIZ standard).
Bio-based polyurethane pad (carbon footprint reduced by 35%)
3. Functional integration development
Damp-vibration isolation integrated pad (insertion loss ≥25dB)
Three-dimensional microporous structure pad (adjustable stiffness range ±20%)