What are the discussion on the damping performance of rubber shock absorber
Since rubber shock absorber plays a strong role in various mechanical equipment, its shock absorption performance will be studied for many times, and the following performance characteristics can be obtained from the results of various studies:
1. 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;
2. Rubber is non retrenchment data (Poisson's ratio is 0.5);
3. Rubber has high elasticity and viscoelasticity;
4. Compared with steel, rubber has a large elastic deformation and a small elastic modulus;
5. 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;
6. 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.

Generally, the lower limit of measured fluid conductivity is 5 μ S/㎝~10 μ S/cm, so if the electrode diameter is 1 cm, the output impedance of the electrode of the electromagnetic flowmeter will be 1/Kd=100k Ω~200k Ω. To limit the impact of the output impedance to less than 0.1%, the input impedance of the converter should be about 200M Ω