Advantages and disadvantages of rubber shock absorbers:
1. The applicable frequency range is 5-15Hz.
2. The rubber shock absorber has the performance of isolating vibration not only in the axial direction, but also in the lateral and rotational directions. The same rubber shock absorber can have a wide choice of stiffness in the three directions of Cartesian coordinates and the direction of rotation. .
3. The internal damping of rubber is much larger than that of metal, the high-frequency vibration isolation performance is good, and the sound insulation effect is also very good. The damping ratio is 0.05-0.23. Because rubber is easy to form, it can also be firmly bonded to metal, so it can be designed and manufactured. Shock absorbers of various shapes are produced, and they are light in weight, small in size, low in price, widely used, easy to install and easy to replace.
4. The performance of high temperature and low temperature resistance is relatively poor. The upper limit of the temperature used by ordinary rubber shock absorbers is 70 °C and the lower limit is 0 °C. With special rubber, the lower temperature limit of the shock absorber can reach -50 °C; poor oil resistance , It is easy to age in the air, especially in direct sunlight, it will accelerate the ageing, and the general life is about 8 years;
5. In terms of manufacturing, it is difficult to avoid certain differences in performance, and the load characteristics are also difficult to be consistent. Under the action of large loads for a long time, relaxation will occur.

The factors that determine the dynamic stiffness and static stiffness of the rubber shock absorber include: the formula of the rubber, the hardness of the rubber and the shape of the rubber shock absorber.

Rubber shock absorbers can be divided into three categories from the shape and force deformation: compression type, shear type and composite type.

The advantages of spring dampers are:
1. Large static compression, low natural frequency and good low frequency vibration isolation performance;
2. It can withstand the erosion of oil and water, and the temperature change does not affect the performance;
3. No aging, no creep.

The disadvantages of spring dampers are:
1. The damping itself is very small, and the transfer ratio is very large at resonance;
2. The steel wire will transmit vibration at high frequency;
3. It is easy to produce rocking motion. Generally, some soft materials such as rubber or felt can be filled to improve the vibration isolation performance.

rubber shock absorbers