Järnvägskuddarär kärnkomponenterna för att säkerställa smidigheten och stabiliteten hos spår i höghastighetsjärnvägar . deras prestanda påverkar direkt hastigheten, komforten och säkerhetsredundansen för tåg . baserat på operativa egenskaper för höghastighetsjärnvägar, nämligen "hög hastighet, hög belastning och hög stabilitet", PAD-systemet måste uppfylla striktstekniska indikatorer och de tekniska indikatorerna och de tekniska indikatorerna och de tekniska indikatorerna och de tekniska indikatorerna, fokuserar .
The rail pad is the "first buffer layer" of high-speed railway tracks and is generally made of polyurethane. Its dynamic stiffness needs to be controlled at 50-80kN/mm, and the dynamic-static stiffness ratio should be ≤1.3 to cope with the high-frequency impact generated by 350km/h trains. In the Beijing-Shanghai High-Speed Railway and other lines, the polyurethane pad with a Shore hardness of 60±3 still has an elasticity retention rate of over 85% after 3 million fatigue tests, which can reduce the wheel-rail vibration acceleration by more than 30%. At the same time, its insulation resistance is >10⁸Ω, säkerställa en stabil överföring av spårkrets signaler .
Tie plates are mostly embedded cast iron structures in ballastless tracks, with a thickness of 12-16mm, a surface processing accuracy of 0.05mm/m, and a connection error with the track plate of<=1mm. They are rigidly fixed to the track plate by bolts, and cooperate with elastic fasteners to form a "rigid load-bearing !
Composite tie plates play a key role in special sections. Due to the concentrated impact of wheels and rails in the turnout area, a composite structure of "metal skeleton + polyurethane elastic layer" is adopted, with a surface friction coefficient of>=0.8, which can resist the shear stress generated by the lateral force; Lätt aluminiumlegeringsplattor används i bryggavsnittet, som är 40% lättare än traditionellt gjutjärn, vilket minskar brobelastningen samtidigt som korrosionsbeständigheten förbättras genom att anodisera behandlingen för att anpassa sig till den fuktiga miljön på brodäcket.
The application of high-speed rail pads must meet the requirements of "stable performance throughout the entire life cycle", and its replacement cycle must match the track overhaul cycle (usually more than 20 years). Through material optimization (such as adding nano-enhancers) and structural innovation (such as gradual stiffness design), modern high-speed rail pad systems can maintain stable performance in an environment of -40℃to 60℃, tillhandahålla pålitligt spårstöd för höghastighetsskenor som "flyger nära marken" .
Gnee -järnvägis a professional trading company focusing on the export of railway fasteners, committed to providing reliable rail connection products for global railway construction projects. The main products include a full range of railway fasteners such as various spring clip fastener systems, sleeper bolts, anti-loosening washers and insulating components, which are suitable for various application scenarios such as conventional railways, heavy-duty railways and urban rail transit .