The pneumatic butterfly valve is filled with air inside the cord bag, which uses the volume elasticity of the gas to play the role of ball valve, valve and work. The pneumatic butterfly valve has a good effect of absorbing high-frequency vibration and sound insulation. Compared with the steel plate ball valve, the pneumatic butterfly valve has a longer service life when subjected to severe vibration loads. Using the height control valve system, the pneumatic butterfly valve maintains a certain working height under any load, This is very beneficial for vehicles with large load changes
The stiffness of the ball valve changes with the change of load, so the natural vibration of the ball valve is almost unchanged under any load. The common steel plate ball valve has a narrow range of natural vibration frequencies because its stiffness chamber is unchanged, and the change with the change of load is a static comparison between steel plate ball valve and pneumatic butterfly valve
The pneumatic butterfly valve has nonlinear performance, and its performance curve can be designed into an ideal shape. For example, in the vehicle suspension system, the rational shape is S-shaped, that is, it has a relatively low stiffness in the middle section of the curve, while the stiffness gradually increases in the edge section of the stretching and compression stroke In this way, the running performance of the vehicle during normal driving can be guaranteed
Soft, but in occasional occasions such as passing through curves and turnouts, when the pneumatic butterfly valve is pulled and compressed by a large margin, it gradually hardens, which can limit the amplitude of the car body. For ordinary steel plate ball valves, its performance curve is linear. If this ball valve suspension device has the above non-linear characteristics, it is necessary to complicate the structure
A cut-off hole is added between the pneumatic butterfly valve and the additional air chamber. When the air flows through the cut-off hole, energy loss will occur, so it can play a role in reducing vibration. If the size of the cut-off hole is properly selected, damping dampers can be omitted
The stiffness of the pneumatic butterfly valve can be selected by changing the air pressure regardless of the load capacity. Therefore, the stiffness can be selected very low according to the needs. For example, the stiffness can be reduced by increasing the internal volume of the additional air chamber
For pneumatic butterfly valves of the same size, when the internal pressure changes, different bearing capacities can be obtained. This enables the same pneumatic butterfly valve to adapt to multiple load requirements, so the economic effect is good. In addition, the height control valve can also make the pneumatic butterfly valve have different heights under a certain load, so the pneumatic butterfly valve can adapt to multiple structural requirements