Rubber pad in railway

rubber pad in railway

Crane rail presses are divided into flexible rail presses and rigid rail pressure plates. The rigid rail plate is in direct contact with the rail, and it is easy to form point contact or line contact. To prevent this phenomenon, press the tongue between the rail presser and the rail, which also increases the coefficient of friction between them. At the same time, laying a composite rail rubber pad under the track can increase the friction coefficient and surface contact between the crane rails and the support beam, and prevent the track from generating bow waves. It can also prevent noise when the crane is running.

In the national standard atlas 04G325, the 6a series and 6b series of the DGL pressure plate are introduced, and the quick laying compound rubber pad in the railway is also introduced.

Composite rubber pads in railways are divided into continuous laying (through laying) and discontinuous laying (block laying)

1. The function of composite rubber pad in railway:

1.1 Evenly distribute the wheel pressure of the crane to reduce the contact stress under the rail.

1.2 The error of eccentric installation of rails can be reduced

1.3 Make up for the wear of rails and supporting surfaces

1.4 Ensure that the load is stably transmitted from the rail to the foundation, effectively prolonging the life of the rail and the crane.

2. area

This standard specifies the technical requirements, inspection rules, test methods, marking, packaging, transportation, and storage requirements for composite gaskets.

This standard applies to 38kg/m, 43kg/m, 53kg/m, 60kg/m, and 75kg/m railway rails specified in this YB/(T)68 and QU70, QU80, QU100 specified in YB/(T)5055, QU120 crane rail fixed. The composite rubber pad is designed for the fixation of the crane track. The rubber pad is used together with the pressure plate. It can be laid on the steel beam in blocks or continuously, or it can be laid on the steel pad placed on the concrete.

3. MK6 rubber backing plate (strip) technical indicators

3.1. The MK6 rubber backing plate is continuously laid under the rail, with a length of 2 meters per block, or 12 meters, according to user requirements. It is made of a vulcanized synthetic rubber plate and inlaid with a reinforced steel sheet, and the upper surface of the rubber backing plate has grooves.

It can reduce the wear of the rail and the support, absorb the unevenness of the surface, and improve the contact between the rail and the support surface.

It has the properties of abrasion resistance, shear resistance, extrusion resistance, grease resistance, oxidation resistance, and UV resistance.

3.2 Material characteristics of MK6 rubber pad in railway

3.2.1 Composition: Synthetic rubber with reinforced steel sheets.

3.2.2 Shore hardness: 75°A±5 (DIN53505)

3.2.3 Tensile strength: 12.5N/mm2 when leaving the factory -10.5 N/mm2 after aging.

3.2.4 Elongation: 250% when leaving the factory – 200% after aging.

3.2.5 Deformation (according to BS903partA6): <5% when leaving the factory: <20% after aging.

3.2.6 Allowable compressive stress: 80 N/mm2 (small)

3.2.7 Operating temperature: from -25°C to +100°C, for other temperatures

2.2.8 Noise and Vibration Reduction:

Noise: 10% DBA reduction on average

Vibration: An average reduction of 48%.