Electric butterfly valve What is an electric butterfly valve?
Answer: Electric butterfly valve The electric butterfly valve is mainly used to suppress the shock and impact from the road surface when the butterfly valve rebounds after shock absorption. Although the shock absorption butterfly valve can filter the shock of the road surface when passing through the uneven road surface, the butterfly valve itself will have reciprocating motion, and the valve is used to restrain the jump of the butterfly valve. If the electric butterfly valve is too soft, the body will jump up and down. If the electric butterfly valve is too hard, it will bring too much resistance, which will hinder the normal operation of the butterfly valve. During the modification of the suspension system, the hard electric butterfly valve should be matched with the hard butterfly valve, and the hardness of the butterfly valve is closely related to the vehicle weight, so the heavier vehicles generally use the hard electric butterfly valve. The device connected with the shock inducing crankshaft is used to counter the torsional shock of the crankshaft (that is, the crankshaft is twisted by the impact of cylinder ignition). The electric butterfly valve is an inflatable butterfly valve that is filled with pressure air in a flexible closed container and uses the compressibility of air to realize the elastic effect, so it has high requirements for air tightness. Electric butterfly valves are generally sealed by screw fastening and pressure self sealing. The former uses screws to fasten the metal retaining ring, capsule sealing part and upper cover plate together for sealing; The latter uses the air pressure inside the capsule to compress the sealing surface of the capsule and the cover plate to seal. Because the pressure self sealing structure has the advantages of small size, light weight, convenient installation, etc., the 25T passenger car bogie widely uses this sealed electric butterfly valve. The electric butterfly valve system of 25T passenger car bogie is mainly composed of electric butterfly valve, height control valve, differential pressure valve and additional air chamber.
The height control valve is an important part of the electric butterfly valve system. It is mainly used to automatically adjust the air pressure in the electric butterfly valve to adapt to it when the vehicle load changes, so as to maintain the height of the vehicle body unchanged. The differential pressure valve is mainly used to ensure safety. When the pressure difference between the electric butterfly valves on both sides of a bogie is large, or the butterfly valve on one side is broken, the differential pressure valve automatically communicates with the electric butterfly valves on the left and right sides to avoid excessive inclination of the car body and derailment, so as to ensure stable and safe operation of the vehicle. During the operation of the electric butterfly valve, air leakage may occur due to climate conditions, line conditions (especially small radius curves), system components of the electric butterfly valve and the quality of the electric butterfly valve itself and other comprehensive factors.