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composite rubber pads

 


composite rubber pads

Crane rail presses are divided into flexible rail presses and rigid rail presses. The rigid rail presser 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 composite rubber pads under the track can increase the friction coefficient and surface contact between the rail 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 composite rubber pads are also introduced.

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

1. The function of composite rubber pads:

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, 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 backing plate is designed for the fixing of the crane track. The rubber backing plate and the pressing plate are used together and can be laid on the steel beam in blocks or continuously, or on the steel backing plate placed on the concrete.

3. MK6 rubber backing plate (steel strip reinforced rubber pad) 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 backing plate

3.2.1 Composition: Synthetic rubber with reinforced steel sheets.
3.2.2 Shore hardness: 75°A±5 (DIN53505)
3.2.3 Tensile strength (ASTMD412C): 12.5N/mm2 ex-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%.

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