The relationship between the permanent compression deformation of the underrail pad and its long-term vibration damping performance
What effects will excessive compression set have on the performance of the pad?
Excessive deformation will cause the pad to permanently dent, lose its elasticity, and the vibration damping effect will rapidly decline. At the same time, it will aggravate the unevenness of the track, accelerate the wheel-rail impact, and increase the risk of loose fasteners and damaged sleepers.
What are the differences in the compression set between rubber materials and polyurethane materials?
The permanent compression set of rubber pads is relatively high, and they tend to age and harden over long-term use. Polyurethane pads have a low deformation rate, strong elastic recovery ability, more stable performance under high-frequency loads, and a longer service life.
How does the line environment affect the compression permanent deformation of the pad?
High-temperature, humid and oily environments will accelerate the aging of the pad material and increase the deformation rate. Low-temperature environments will reduce elasticity and accelerate deformation. In complex environments, special materials that are resistant to aging and deformation should be selected.
How does compression set detection evaluate the service life of the pad?
The smaller the deformation rate, the better the material's anti-aging and anti-fatigue performance, and the longer its service life. By detecting the deformation rate, it can be determined whether the pad still meets the vibration damping requirements. Replace the failed components in time to ensure the smoothness of the track.
How to enhance the anti-compression permanent deformation capacity of the pad?
Select high-elasticity and aging-resistant rubber or polyurethane raw materials, and optimize the formula and production process. Add anti-aging agents and reinforcing fillers to enhance material stability and reduce deformation and failure under long-term loads.