The rubber cushion is characterized by both high elasticity and high viscosity. The elasticity of the rubber is caused by the change of its crimped molecular conformation. The intermolecular interaction of the rubber interferes with the movement of the molecular chain and shows the stickiness. , resulting in stress and strain are often in an imbalanced state.
Rubber cushion principle
The crimped long-chain molecular structure of rubber and the weak secondary forces existing between the molecules make the rubber material exhibit unique viscoelastic properties, and therefore has good shock absorption, sound insulation, and cushioning properties. Rubber parts are widely used for vibration isolation and shock absorption because of their characteristics of hysteresis, damping and reversible large deformation. The hysteresis and internal friction characteristics of rubber are usually expressed as loss factors. The greater the loss factor, the more significant the damping and heat generation of the rubber, and the more significant the damping effect.
Rubber cushion application
Rubber shock-absorbing products include rubber cushions, rubber air springs, rubber fenders (see color pictures), sponge and cork rubber cushions, elastic couplings, and flexible tubes.
E.g:
1 rubber cushion. Most of them are rubber and metal composite products, and they are available in double plate, cylindrical, and chip type and are used for vibration damping and sound insulation of various machinery, instruments, axles and pipelines.
2 rubber air springs. It has better shock absorption and impact resistance than metal springs and is mainly used in vehicles. Its structure is similar to that of tubeless tires. The ply is a pressure-resistant layer with an airtight rubber layer and a protective rubber layer that is resistant to oil and aging.
3 rubber bearings. Made of rubber sheet and rigid material (plate, wire mesh, canvas). The latter can improve the compressive strength of the bearing and have little effect on the shear strength. The rubber bridge supports can transmit the bridge load to the abutments and can adapt to the deformation of the bridge and reduce vibration. Rubber construction supports can reduce the impact of subways and surrounding vehicles and earthquakes on buildings.
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