Single bladder pneumatic butterfly valve can effectively suppress resonance amplitude
Air bomb is a non-metallic ball valve that takes part in pressure air in flexible closed containers and uses the elasticity of compressed air to complete vibration isolation, relaxation and buffering. The pneumatic butterfly valves are mainly of two types: bladder type and membrane type, which are widely used at home and abroad, but there are few studies in this regard. In order to complete the control of pneumatic butterfly valves, It is necessary to establish an accurate mechanical model. In this paper, the model of the single capsule CFM pneumatic butterfly valve in the auxiliary air chamber is established, and the formulas for calculating the stiffness and frequency are derived
The structure of a single capsule CFM pneumatic butterfly valve with an auxiliary air chamber. The ball valve can accept a larger load and has a lower stiffness, so that the pneumatic butterfly valve vibration isolation system has a lower natural frequency and achieves better vibration isolation effect. At the same time, an orifice is set between the main air chamber and the auxiliary air chamber of the pneumatic butterfly valve. When the pneumatic butterfly valve vibrates and deforms, a pressure difference will occur between the main and auxiliary air chambers, When air flows through the throttle hole, it absorbs a part of energy due to resistance, so it has a Renni effect. A suitable throttle hole can improve the damping characteristics of the vibration isolation system and effectively suppress the resonance amplitude