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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.


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Advantages of Double-Layer Nonlinear Vibration Reduction Fastener With Shoulders

1. Shoulder Limit Structure, High Lateral Stiffness (Higher Vibration Reduction Capacity, Higher Stability)



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


3. 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.

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

Project Item

Technical 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 height

Same as ordinary fasteners

Adjustment amount of rail

Maximum track gauge adjustment: ±20mm

Maximum rail height adjustment: 0~30mm for e-type fasteners, 0~40mm for w-type fasteners.

Fatigue Performance

Vertical loading 8.6 ~ 43kN, lateral loading 6.8 ~ 34kN, after 3 million times of fatigue test, static stiffness change rate is no more than 10%, gauge change amount is no more than 6mm, each component is not damaged; Measurement of rail dynamic displacement, unilateral rail head dynamic displacement is no more than 3mm, unilateral rail bottom is no more than 2.5mm.

Vibration Reduction Effect

Straight section=10dB

Small radius curve section≥8dB