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double layer nonlinear vibration reduction fastener with shoulders 01

Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

The Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders is medium and high vibration damping fasteners designed with self-locking structure of the shoulder part. The fasteners have large transverse stiffness, good safety stability performance and low installation height. They are the mainstream solutions for the medium vibration damping fasteners in China.


Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

Advantages of Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

  • Shoulder Limit Structure, High Lateral Stiffness

This fastening in railway features a shoulder limit structure that enhances lateral stiffness, resulting in higher vibration damping and improved stability.


  • Pre-Assembly and Easy Installation

Through nesting type structure design and self-locking structure design, the vibration reduction fastener realizes preassembly in the factory, easy installation on-site, and convenient operation, replacement, and maintenance. The installation height of the railway fastener system is basically the same as that of the ordinary ones, which simplifies the construction of the railway system and the operation of transformation construction.


  • Adjustable Distance and Height

There are a variety of ways to realize the adjustment of distance and height functions of fastener systems, which could realize the demands of larger distance and height adjustment in the process of later operation and maintenance.

Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

Performance Indicators of Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

Project ItemTechnical Indicators
Static Stiffness, Dynamic-Static Ratio (5-35kN)Straight Section:10±2kN/mm
Curve Section:12±2kN/mm
Dynamic-static ratio less than 1.4
Fastener installation heightSame as ordinary fasteners
Adjustment amount of railMaximum track gauge adjustment: ±20mm
Maximum rail height adjustment: 0~30mm for e-type fasteners, 0~40mm for w-type fasteners.
Fatigue PerformanceVertical loading 8.6 ~ 43kN
Lateral loading 6.8 ~ 34kN
After 3 million fatigue cycles:
Static stiffness change rate: ≤10%;
Gauge change: ≤6mm;
No damage to components;
Measurement of rail dynamic displacement:
Unilateral rail head dynamic displacement: ≤3mm;
Unilateral rail bottom displacement: ≤2.5mm;
Vibration Reduction EffectStraight section=10dB
Small radius curve section≥8dB


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