Difference between rubber shock absorber and spring shock absorber
Rubber shock absorber and spring shock absorber are two different shock absorbers, and they are quite different, but their role is to reduce vibration. When choosing shock absorbers, many people do not know whether to buy rubber shock absorber or spring shock absorber. In fact, first of all, we should understand the difference between the two to know their detailed use.
Characteristics of rubber shock absorber:
1. Rubber has high elasticity and viscoelasticity;
2. Compared with steel, rubber has a large elastic deformation and a 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 line, and its area is equal to the vibration energy (damping) converted into heat in each vibration cycle, which can be adjusted through formula design;
5. Rubber is non retrenchment data (Poisson's ratio is 0.5);
6. The rubber shape can be freely selected, the hardness can be adjusted by formula design, and can meet the requirements of stiffness and strength in different directions; 7. Its natural frequency is difficult to reach below 5HZ;
8. Its resistance to environmental and high temperature changes is weak and its life is short; 9. No sliding parts, easy to take care of.
Characteristics of spring damper:
1. Low frequency design, good vibration isolation effect;
2. It has strong adaptability to the working environment and can work normally at - 40 ℃ - 110 ℃. It has obvious effects on active vibration isolation, passive vibration isolation, shock vibration isolation and solid sound transmission isolation;
3. Wide load range and strong compliance.
As long as we understand the difference between the above characteristics of rubber shock absorber and spring shock absorber, we can know which one of them is the appropriate type of shock absorber.

What must be done for metal compensator to be qualified
Everything is good or bad, and the products we consume must pass strict inspection before leaving the factory. Only qualified products can leave the factory. So, what conditions should we have before we can leave the factory?
1. Materials of other structural parts must have material certificates.
2. The materials of compensator elements and barrel joints must be provided with material certificates, and they shall be re inspected as qualified according to relevant specifications.
3. The longitudinal welds of components must be 100% X-ray flaw detection, which is acceptable at Level I. The longitudinal welds of cylinder section must be 100% X-ray flaw detection, which is acceptable at Level II.
4. The circumferential weld between element and cylinder section must pass dye penetrant inspection and kerosene leakage inspection.
5. After the whole assembly of elements and cylinder sections is completed, the air tightness and strength tests must be stopped according to the specifications.
6. The surface (inside and outside) of the element shall be free of scratches or welding spatters larger than the negative deflection of the plate.
7. The overall dimensions shall meet the requirements of drawings and relevant specifications.
The above are some general specifications of metal compensators introduced by Xiao Bian, which can be created by ourselves.