Single bladder electric butterfly valve can effectively suppress resonance amplitude
Air bomb is a non-metallic butterfly 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 main types of electric butterfly valves are 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 electric butterfly valves, It is necessary to establish an accurate mechanical model. In this paper, the model of the single capsule CFM electric 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 electric butterfly valve with an auxiliary air chamber. The butterfly valve can accept a larger load and has a lower stiffness, so that the vibration isolation system of the electric butterfly valve 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 electric butterfly valve. When the electric 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