Basic structure of Dongfeng brand pneumatic butterfly valve
1. The natural vibration frequency of the pneumatic butterfly valve is lower than that of the auxiliary air chamber, but the natural vibration frequency of the pneumatic butterfly valve device is reduced to 0.5~3Hz. Under the action of any load, the pneumatic butterfly valve can maintain a low and nearly equal vibration frequency.
2. The pneumatic butterfly valve can isolate high-frequency vibration and sound insulation effect is good. It is composed of air and has small internal friction. The inherent vibration of the ball valve itself will not affect the ability to isolate high-frequency vibration. In addition, the pneumatic butterfly valve has no metal to metal contact, so it can sound insulation and sound proof effect is also very good.
3. The damping effect of air can be used to add an orifice between the pneumatic butterfly valve and the additional air chamber. When the spring load vibrates, the air flows through the orifice and has energy loss, thus playing the role of vibration attenuation.
4. Selection of ball valve height, bearing capacity and ball valve stiffness: During the design, the ball valve height, bearing capacity and ball valve stiffness can be selected from each other. The flexible ball valve performance can be obtained.
Height of ball valve: height control valve can be used to properly control the height of pneumatic butterfly valve according to the use requirements, and maintain a certain height when the load on the spring changes.
Bearing capacity: for pneumatic butterfly valves of the same size, different bearing capacity can be obtained by changing the internal pressure, which is roughly proportional to the internal pressure. This enables the same pneumatic butterfly valve to adapt to multiple load requirements.
Ball valve stiffness: when designing the stiffness of the pneumatic butterfly valve, it can be selected by changing the internal pressure of the ball valve. The stiffness is roughly proportional to the internal pressure. Therefore, the stiffness can be selected very low as required. For a pneumatic butterfly valve with a given size, the stiffness is variable, and it changes with the change of load, so the natural vibration frequency is almost constant under any load, Therefore, it can make the supported system have almost constant performance.