The parameters of elastomer isolators mainly include the following aspects:
1.Materials and elastomers:
Common materials include NR (natural rubber), SBR (styrene-butadiene rubber), BR (butadiene rubber), NBR (nitrile rubber), CR (chloroprene rubber), EPDM (ethylene propylene diene monomer rubber), IIR (isobutylene-isoprene rubber), etc.
- Stiffness:
Static stiffness and dynamic stiffness are the main factors affecting the shock absorption characteristics of elastomer isolators. They can be adjusted by changing the selection of raw rubber, the selection and proportion of carbon black, and the type of oil used.
- Durability:
It is necessary to have good resistance to natural aging, heat, cold, as well as good elasticity, buffering and shock absorption performance.
- Shape and hardness:
The shape of elastomer isolators can be freely determined, and the hardness can be controlled by adjusting the components of the rubber formula to meet the stiffness and strength requirements in different directions.
- Damping characteristics:
The stress-strain curve of rubber is an elliptical hysteresis loop, and its area is equal to the vibration energy converted into heat in each vibration cycle, which can be adjusted through formula design.
- The damping performance is usually characterized by the damping coefficient tan δ. Within the frequency range and temperature interval of the product use, a larger tan δ value and a wider loss peak can ensure better shock absorption effect in a wider range and reduce its sensitivity to temperature and frequency.
- Working temperature range:
The working temperature range of elastomer isolators is relatively wide, from -15°C to 60°C.
- Size and load-bearing capacity:
Different models of elastomer isolators have different requirements for size and load-bearing capacity. Shock absorbers that are too small in size or insufficient in load-bearing capacity are difficult to achieve ideal shock absorption effects and may be deformed or damaged due to excessive pressure.
- Application fields:
Elastomer isolators are widely used in machinery, automobiles, railway locomotives, waterborne transportation vehicles, airplanes, etc. They are suitable for supporting electrical appliances, electronic products, furniture equipment, toys, hardware, medical equipment, sports goods, audio, lighting, machinery, automobiles and other industries.
- Special design:
Some specially designed elastomer isolators, such as the bell-shaped shock absorber series, have the characteristic that the horizontal stiffness is greater than the vertical stiffness, which is suitable for generators, presses, pumps, diesel engines, compressors, etc.
- Service life:
Elastomer isolators are designed with ingenious and reasonable structures, are durable, have anti-rust treatment on the surface, anti-slip design on the bottom pad, moderate hardness, and the side-limiting rubber is generally soft and wear-resistant, which can ensure a long service life.