The cause and management of pneumatic pneumatic - valve vibration

The vibration of the pneumatic pneumatic - valve generally divided into two states, one is a pneumatic pneumatic control valve of the overall vibration, namely the whole pneumatic pneumatic - valve in the pipe or frequent vibration. Another is the vibration of the pneumatic - valve valve core, the frequent movement can be seen from the stem and the following are the two vibration causes and treatment measures are as follows: the whole pneumatic pneumatic control valve on the pipeline vibration causes are as follows: roughly pipe or base violent vibration, easy to cause the entire pneumatic pneumatic - valve vibration; Also related to the frequency, that is, when the frequency of the external and the system is equal or close to the natural frequency of forced vibration energy reached maximum, produce resonance. These two factors influence each other, sometimes can make the vibration of the vibration intensity, the pipeline pumping, loose accessories or components, and the thrum of the man, serious still can cause stem fracture, seat falls off, the system will not work. Based on this kind of situation, to cause vibration of the pipeline and base for reinforcement, it also helps to eliminate the influence of external frequency. Pneumatic pneumatic - valve installation position should be far away from the vibration source, such as inevitable, preventive measures should be taken. The whole pneumatic pneumatic - valve vibration, in has not yet reached resonance case, pneumatic pneumatic - valve is basically can be adjusted according to the outside of a given signal. Because the relative displacement of a given signal to the valve core, does not change due to the vibration of the whole pneumatic pneumatic - valve or change is very small, the reason for this is that they are a whole. At the ends of the pneumatic control valve of pneumatic cut-off valve fierce to open or close fiercely, will make the rapid flow of medium produces strong reflected shock wave, reflected wave impact pneumatic - valve core. Air fluctuations make the positioner output, some rust or locator activity, is not flexible, make not corresponding to the input and output signal generated by leaps and bounds. At this time should be open air cleaning of the pressure reducing valve locator, and apply grease to the activities section, to eliminate friction. Due to the effect of unbalanced force of the pneumatic pneumatic - valve itself, make the pneumatic control valve core often produces oscillations. Zero spring tension is too small, the ability to resist interference is small, the outside world signals under the condition of small, easy to make the valve core produces vibration.