The performance of pneumatic butterfly valve shall be evaluated by valve test. The valve test is usually carried out only when the shock absorber is newly designed and manufactured, and it is not necessary to test the shock absorber one by one after mass production; Only type test is needed. However, the shock absorbers that are particularly important or must be adjusted in the shock absorption test to meet the technical requirements shall be tested one by one. The vibration reduction test should be carried out on the whole machine, so that the test conditions are the actual working conditions; The vibration reduction test can also be carried out on a special vibration reduction test bench, that is, the actual working conditions are simulated, the vibration source is artificially manufactured, and the difference between the shock absorber without the shock absorber and the shock absorber installed is compared to evaluate the advantages and disadvantages of the shock absorber.
According to different situations, various vibration excitation methods can be used to artificially produce vibration sources, such as using eccentric wheel rotation to drive the slider to generate reciprocating displacement excitation, using centrifugal force generated by unbalanced rotor to excite, using compressed air blower to excite, using loudspeaker to excite, using electromagnetic induction to excite, or using special vibration table to excite, etc. The parameters to be measured during vibration test include frequency, amplitude, velocity, acceleration, etc., and sometimes the stress or strain of some parts of the machine is measured. Different industrial departments and different machine products have different requirements for vibration.
Any pneumatic butterfly valve has its limitations. For example, ball valve pneumatic butterfly valve cannot be used for vibration isolation of machines with similar frequencies in many cases, and air cushion pneumatic butterfly valve may not be used for vibration isolation of on-board equipment. But this does not mean that they have no valve effect, only that they are not suitable for some occasions. The same is true for pneumatic butterfly valves. Pneumatic butterfly valve is suitable for high-frequency vibration equipment, and also suitable for some types of stamping vibration. The effect is very good! Finally, many pneumatic butterfly valves on the market only have the appearance, not the lining! Their design premise is not designed according to the vibration reduction requirements at all. Such products cannot be called pneumatic butterfly valves at all, which is the root cause of the deterioration of pneumatic butterfly valves.
Finally, pneumatic butterfly valves are widely used; To sum up, we should not misunderstand that pneumatic butterfly valves have no damping effect. If the desired effect is not achieved, then there must be no pneumatic butterfly valve suitable for you.