The pneumatic ball 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 ball valve has a good absorption of high-frequency vibration and sound insulation effect. Compared with the steel plate ball valve, the pneumatic ball valve has a longer service life when subjected to severe vibration loads. The height control valve system is used to keep the pneumatic ball valve at 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 constant under any load. The common steel plate ball valve has a narrow range of natural vibration frequencies because its stiffness chamber is constant, and changes with the change of load, which is a static comparison between steel plate ball valve and pneumatic ball valve
The pneumatic ball 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, it can ensure that the running performance of the vehicle is soft during normal driving. However, when passing through curves and turnouts and other occasional occasions, the pneumatic ball valve is subject to a large amount of tension and compression, it gradually hardens, which can limit the amplitude of the vehicle body. The performance curve of the ordinary steel plate ball valve is linear. If the suspension device of the ball valve has the above nonlinear points, it is necessary to complicate the structure
A cutoff hole is added between the pneumatic ball valve and the additional air chamber. When air flows through the cutoff hole, energy loss will occur, which can play a role in reducing vibration. If the size of the cutoff hole is properly selected, vibration damper can be omitted
The stiffness of the pneumatic ball valve can be selected by changing the air pressure regardless of the load capacity. Therefore, the stiffness can be selected very low as required. For example, the stiffness can be reduced by adding additional air chambers to increase its internal volume
For pneumatic ball valves of the same size, when the internal pressure changes, different bearing capacities can be obtained. This enables the same pneumatic ball valve to adapt to a variety of load requirements, so the economic effect is good. In addition, the height control valve can also be used to make the pneumatic ball valve have different heights under a certain load, so the pneumatic ball valve can adapt to a variety of structural requirements