With the development of the automobile industry and industrial technology, the use of high-strength nylon, Kaplon and other cord fabrics, the membrane electric butterfly valve has been widely used on the suspension of domestic and overseas buses in recent years. For example, this type of butterfly valve is used on Leland, Wuhan WH644 and WH643 buses. Its points are:
a. It can be regarded as the formation of the lower cover plate of the bladder electric butterfly valve into a piston. Because this change has greatly improved the elasticity and performance of the electric butterfly valve, and obtained a more ideal inverted "S" shaped butterfly valve and performance curve than the bladder electric butterfly valve. It can be seen that the rigidity change of the membrane electric butterfly valve is smaller than that of the bladder electric butterfly valve within its normal operating range, so in terms of the vibrating head energy, the membrane electric butterfly valve is much better than the bladder electric butterfly valve It is worth mentioning that the membrane electric butterfly valve can control the change rate of its effective area by changing the shape and size of the piston to obtain ideal elasticity and performance. This is not easy to do for the bladder type electric butterfly valve.
b. The change rate of the effective area of the membrane electric butterfly valve is smaller than that of the capsule electric butterfly valve. Therefore, the membrane electric butterfly valve can obtain a lower natural vibration frequency when the auxiliary air chamber is small. However, it is not easy for the bladder type electric butterfly valve to be designed with very low frequency.
c. At present, the sealing form of the membrane electric butterfly valve is generally pressure self sealing, while the sealing of the capsule electric butterfly valve is generally clamped with screws, so the sealing of the membrane electric butterfly valve is simple and easy to assemble and disassemble.
d. The membrane electric butterfly valve is simple in manufacture and convenient for mass production.
Mainly used for vibrating machinery, double deck passenger cars, trucks and other industrial machinery. Butterfly valves are commonly used in mechanical equipment, vehicle running mechanism and suspension system, playing a role of shock absorption and buffering.