Rubber Bearings
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- Laminated Rubber Bearing
Laminated Rubber Bearing
Types: standard laminated bearing pad and sliding laminated bearing pad.
Advantages: it has the advantages of simple structure, convenient installation, saving steel, low price, simple maintenance, easy replacement, etc.
Application: it is widely used in bridge construction, hydro-power engineering, and building anti-seismic facilities.
A laminated rubber bearing is a rubber block vulcanized elastomeric rubber with inner reinforced steel plates. This bearing is a kind of connection between upper structure and lower supporter. It has advantages as followings:
- Sufficient vertical rigidities to bear and transmit normal loads;
- Good flexibilities for rotation in any direction;
- Considerable shear deformation to satisfy horizontal movement;
- Perfect anti-vibration to reduce the impact of dynamic load.
An elastomeric bearing can also be bonded with PTFE plate to satisfy large horizontal movement in one or two directions.
Circular Bearing
Rectangular Bearing
Physical Properties of Rubber
Items | Polychloroprene rubber | Natural rubber | |
Hardness (IRHD) | 60±5 | 60±5 | |
Tensile Strength (MPa) | ≥17 | ≥18 | |
Elongation at Break (%) | ≥400 | ≥450 | |
Low Temperature Brittleness (℃) | ≤-40 | ≤-50 | |
Permanent Deformation at Constant Compression (70℃×24h) (%) | ≤15 | ≤30 | |
Ozone Resistance Aging 20% (38℃×100h) of Elongation | No cracks | No cracks | |
Hot Air-oven Aging Test (Maximum Change) | Testing Conditions (℃×h) | 100×70 | 70×168 |
Tensile Strength (%) | -15 | -25 | |
Elongation at Break (%) | -40 | -25 | |
Hardness Change (IRHD) | 0, +10 | -5, +10 | |
