Viscoelastic damping materials The commonly used viscoelastic materials are high molecular polymers, such as polychloroprene, silicone, PVC, epoxy resin adhesive and foam plastic composite damping.
If viscoelastic materials are coated on the metal sheet, the strength of bending vibration of the metal can be reduced. When the bending vibration of metal occurs, its vibration energy is quickly transferred to the damping material closely attached to the thin plate, causing friction and mutual dislocation within the damping material. Due to the large internal loss and internal friction of damping materials, a considerable part of the vibration energy of the metal plate is dissipated into heat energy, which weakens the bending vibration of the plate, and can shorten the vibration time of the plate after being excited, thereby reducing the energy of the radiation noise of the metal plate and achieving the purpose of noise reduction.
2. Damping metal
Damping metal, also known as damping alloy, can be used as a structural material to directly replace the parts with strong vibration and sound in machinery, and can also be made into a damping layer and pasted on the vibrating parts to achieve the effect of vibration reduction and noise reduction.
3. Additional damping structure
There are two common methods to attach damping structures to vibrating plates: free damping layer structure and constrained damping layer structure.
Hazards and impacts on operators under vibration environment.
1) Workers working in the vibration environment are often affected by the vibration, which interferes their vision, hinders their hand movements and makes it difficult to concentrate their energy. This often leads to a decrease in operating speed, production efficiency, fatigue, and quality accidents, even safety accidents.
2) If the vibration intensity is large enough, or the workers work in a vibration environment with considerable intensity for a long time, the workers may cause harm or impact on the nervous system, digestive system, cardiovascular system, endocrine system, respiratory system, etc.
For the above hazards, Dongfeng electric butterfly valve still suggests that everyone should pay more attention to the body and try to avoid working without an electric butterfly valve. For such operators, electric butterfly valves should be installed to make our work safer.