Pneumatic butterfly valve (Absorber), pneumatic butterfly valve is mainly used to restrain the shock and impact from the road surface when the ball valve rebounds after shock absorption. When passing rough roads, although the shock absorption ball valve can filter the vibration of the road, the ball valve itself will have reciprocating motion, and the pneumatic butterfly valve is used to restrain the jump of the ball valve. If the pneumatic butterfly valve is too soft, the body will jump up and down. If the pneumatic butterfly valve is too hard, it will bring too much resistance, preventing the normal operation of the ball valve. During the modification of the suspension system, the hard pneumatic butterfly valve should be matched with the hard ball valve, and the hardness of the ball valve is closely related to the vehicle weight, so the heavier vehicles generally use the hard pneumatic butterfly valve. The device connected with the shock inducing crankshaft is used to counteract the torsional vibration of the crankshaft (that is, the crankshaft is twisted by the impact of cylinder ignition).
Hydraulic pneumatic butterfly valve
Hydropneumatic butterfly valves are widely used in automobile suspension systems. The principle is that when the frame and the axle move reciprocally and the piston moves reciprocally in the cylinder barrel of the pneumatic butterfly valve, the oil in the pneumatic butterfly valve housing flows repeatedly from the inner cavity through some narrow pores into another inner cavity. At this time, the friction between the liquid and the inner wall and the internal friction of the liquid molecules will form the damping force for the vibration.
Inflatable pneumatic butterfly valve:
Inflatable pneumatic butterfly valve is a new type of pneumatic butterfly valve developed since the 1960s. Its structural feature is that a floating piston is installed at the lower part of the cylinder barrel, and a sealed gas chamber formed by the floating piston and one end of the cylinder barrel is filled with high-pressure nitrogen. The floating piston is equipped with a large section O-ring, which completely separates oil and gas. The working piston is equipped with a compression valve and an extension valve that can change the cross-sectional area of the channel according to its movement speed. When the wheels are bouncing up and down, the working piston of the pneumatic butterfly valve reciprocates in the oil, causing the oil pressure difference between the upper chamber and the lower chamber of the working piston. The pressure oil pushes open the compression valve and the extension valve and flows back and forth. Because the valve has a large damping force on the pressure oil, the vibration is attenuated.