As a kind of important rubber vibration dampening mounts, rubber vibration dampening mount has been widely used in various machinery, automobile, railway locomotive, water transport, aircraft and other aircraft. It can be said that rubber vibration dampening mounts are needed in places where shock absorption and isolation are needed.
The reason why rubber vibration dampening mounts are so widely used is that they effectively utilize the following characteristics of rubber:
1) rubber has high elasticity and viscoelasticity;
2) compared with the steel material, rubber has large elastic deformation and small elastic modulus.
3) the impact stiffness of rubber is greater than the dynamic stiffness and the dynamic stiffness is greater than the static stiffness, which is conducive to reducing the impact deformation and dynamic deformation.
4) the stress-strain curve is an elliptical hysteresis curve, whose area is equal to the vibration energy (damping) that is converted into heat during each vibration period, which can be adjusted through formula design;
5) rubber is incompressible material (Poisson ratio is 0.5);
6) the rubber shape can be freely selected, and the hardness can be adjusted through formula design, which can meet the requirements of stiffness and strength in different directions.
Advantages of rubber vibration dampening mount:
(1) The shape can be determined freely, and the hardness can be controlled by adjusting the rubber formula component to meet the requirements of stiffness and strength in all directions;
(2) The internal friction is large and the damping effect is good, which is beneficial to cross the resonance region and attenuate high frequency vibration and noise.
(3) The elastic modulus is much smaller than that of the metal, resulting in larger elastic deformation;
(4) No sliding part, easy to maintain;
(5) Small quality, easy to install and disassemble.
(6) The impact stiffness is higher than static and dynamic stiffness, which is conducive to impact deformation.
The main application areas of rubber vibration dampening mount: rubber vibration dampening mount for automobile, rubber vibration dampening mount for railway locomotives and sleepers, rubber vibration dampening mount for Bridges and rubber vibration dampening mount for construction.