The following is a detailed introduction to the damping and vibration isolation methods of the fan:
(1) The natural frequency of the system uses the metal spiral spring as the vibration isolation element. When the natural frequency is 2.4Hz and the speed is 600r/min, the vibration isolation efficiency is more than 90%.
(2) The fan unit is allowed to vibrate. To ensure the normal operation and service life of the fan unit, the vibration of the fan unit after vibration isolation shall be controlled within 10mm/s.
(3) Additional mass blocks. The additional mass is an important condition to ensure that the vibration of the fan unit itself reaches the above indicators. The mass disk of the public base of the fan vibration isolation system is designed to be about 3 times the mass of the unit.
(4) The structural type of the vibration isolation system has the advantage of reducing the center of gravity of the unit, improving the bearing surface of the vibration isolator, which is conducive to the stability of the unit. The public base, namely the vibration isolation platform, uses a mixed structure of concrete and steel, which makes the device and conditioning easier.
Damping (damping spring shock absorber) can prolong the service life of metal structure in vibration environment. In addition, after the support installation of electronic instruments or the constraint damping treatment of circuit boards, the Q value and resonance peak value of the system can be significantly reduced, and the vibration energy can be weakened, improving the service life of electronic instruments.

How to test the safety performance of pneumatic butterfly valve
As an important link component in engineering technology, it is widely used in aerospace, petrochemical, mining electronics, machinery and shipbuilding, medical and health, textile electronics, energy buildings and other fields. In these industries, the performance testing requirements for the quality of metal bellows used are stricter, especially the pressure test and air tightness test.
The withstand voltage test of is a safe performance index experiment. The purpose of stopping the pressure test is to detect whether the hose has abnormal failure modes such as leakage and parts damage. As the qualified product request does not allow abnormal failure modes such as leakage or parts damage.
Dry and clean air, or nitrogen or other maintenance gases as required, are used as the test medium for the air tightness test. The air tightness test is stopped to check whether there is air leakage in the hose. Test method: block one end of the hose to be tested, connect the other end with the air outlet installed under pressure, immerse the hose in water, remove the bubbles adsorbed on the mesh sleeve, hold the pressure for 10min after the air pressure is stable, and check whether there is air leakage on the test piece.
Natural gas users can think about replacing metal pipes