What are the functions of rail pads and insulators?
Railway rubber pad is an important part in rail structure, which is the connex of rails and concrete structure parts in order to protect from vibrating and impacting. In addition, through it the railway signal system can be also in the state of electric isolation. Due to being bare in the atmosphere for a long time, rail pad needs to be with good performances of aging resistance and cold & heat resistance, which still needs to be with good performance of noise reduction in some railways, for example, subway, etc.
Rail pad functions
A rail rubber pad is essential in reducing shock and vibration in a rail system. The pad laid under the rail to ensure:
Load distribution over a larger surface
Elimination of load concentration and the resultant fatigue stresses
Centering of loads on the supporting element
Absorption of uneven contact surfaces between rail and support
Reduction of noise and vibration
Sealing between the bottom of the rail and the top of the support
Reduction of wear of the rail and its support
The advantages of excellent safety performance, reliable high technology, advanced testing equipments of rail pad make itself be widely adopted and manufactured throughout the world together with raw materials with good quality. GNEE RAIL can manufacture various railway pads in different widths according to different railway base dimensions and standard steel rail length to meet customer's special demands.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
Rail insulator is installed between steel rail and rail tie plate. It serves to insulate rail clips and track bolts from the railway sleepers, as well as adjust the rail gauge. The function of rail insulator is the same as rail pad. As an essential part for the high speed and heavy railroad, they are effective to ensure the safety of rail track.
Functions of Rail Insulators
Electrical Insulation: Primarily serve to electrically isolate the rail from the sleeper/tie plate, crucial for signaling and power systems.
Gauge Maintenance: Help maintain the correct rail gauge (distance between rails).
Vibration & Noise Reduction: Share functions with rail pads in reducing vibration and noise.
Fastening System Integrity: Work with clips, shoulders, and pads as a complete system to secure the rail.
Parameters of Rail Insulator
| Technical Parameter | Unit | Technical Requirement | Value |
|---|---|---|---|
| Density | g/cm | 1.3-1.45 | 1.45 |
| Tensile Strength | Mpa | ≥170 | 178 |
| Elongation | % | ≤4.4 | 4.0 |
| Bending Strength | Mpa | ≥250 | 290 |
| Impact Strength (No gap) | KJ/m2 | ≥80 | 85 |
| Melting Point | ℃ | 250 - 270 | 270 |
| Insulation Resistance | Ω | ≥1×108 | 5×108 |
| Glass Fiber Content | % | 30-35 | 35 |
| Hardness | HRR | ≥110 | 118 |
GNEE RAIL offers different kinds of railway fasteners to meet client's requirements, such as Elastic Rail Clip and Clamp, Rail Screw Spike, Plastic Dowel, High Tensile Track Bolt with Nut, Rail Base(Tie) Plate, Rail Fish Plate, Railway Shoulder(Insert), Fish Bolt, Railroad Rubber and EVA Pad, etc. Samples and drawings provided by customer, we will manufacture qualified products accordingly.
