The pneumatic ball valve is a kind of curved capsule made of, and wire, commonly known as pneumatic tube, corrugated pneumatic tube, leather tiger, etc. Both ends of the capsule shall be connected with two steel plates to form a compressed air chamber. The cable itself does not provide the load bearing capacity, but is completed by the compressed air filled into the capsule. The number of curved sacs is usually 1~3, but it can also be designed and manufactured into 4 or more curved sacs according to needs, and two pneumatic ball valves can be used together under certain conditions. Pneumatic ball valve is also called air stroke regulator and air vibration isolator according to its function and point.
The end structure of the existing curved bladder pneumatic ball valve can be divided into three categories according to the connection mode: one is the fixed flange connection type. The size of the edges at both ends of the pneumatic ball valve is equal to or slightly smaller than the curved bladder. The large outer diameter is equal to or slightly smaller than that of the curved bladder. After drilling several holes, the flange ring and the end plate are used for fastening connection; The other type is the looper flange connection type. The size of the edges at both ends of the pneumatic ball valve is much smaller than that of the curved capsule. The outer diameter is larger than that of the curved capsule. There is no need to drill holes. A flange ring and an ordinary end plate are used for fastening connection The third type is self sealing type, without flange connection, it is pressed into the end plate, and self sealing when filled with compressed air.
The flange sealing forms of the end and connecting plate of the pneumatic ball valve are: LHF, JBF, GF, HF and ZF.
Pneumatic ball valve: a ball valve made of the compressibility of air in a closed container. Its deformation and load relationship. The property line is a curve, which can be designed according to needs. Pneumatic ball valve is an inflation device to replace a steel ball valve in the automobile suspension system. Usually called air bag, pneumatic ball valve is an inflatable ball device. One of its first uses is in semi tractor trailer rig and other heavy equipment. When the pneumatic ball valve is exaggerated, the great potential of riding is very severe, and the vehicle suspension is carried high. When air is driven from the pneumatic ball valve, the ride becomes smoother and the vehicle suspension rides much lower. On board air compressor and storage tank supply pneumatic ball valve and air, and dash installation and suspension installation switch activate the system to add or remove air conditioning riding mass.
The research on pneumatic ball valves in China began in the 1950s. In 1957, Changchun Automobile Research Institute cooperated with Research Institute of Ministry of Chemical Industry to manufacture a heavy truck with air suspension in China. Since then, air suspension of buses, trains and other vehicles has been developed. During this period, China has developed more than 10 types of pneumatic ball valves and 3 types of height control. Although China's research on air suspension started early, it has not developed a practical air suspension system. At present, the air suspension used by various domestic vehicles basically depends on imports. In order to improve our independent development ability of air suspension, major automobile factories, research institutes and colleges and universities in China are increasing their research on the basic theory and design methods of air suspension, and trying to use air suspension on various vehicles. Dongfeng Automobile Research Institute has designed the hybrid air suspension. China National Heavy Duty Truck Corporation installed the floating axle air suspension on the Steyr vehicle. Chongqing Highway Research Institute of the Ministry of Communications has studied the guiding mechanism of the bus non vertical air suspension. Beijing University of Reading carried out bench test on the pneumatic ball valve of Hino RC420 bus, and analyzed the static and dynamic performance of the pneumatic ball valve and the volume and performance of the air chamber. Ding Liangxu from Chongqing Highway Research Institute of the Ministry of Communications carried out computer simulation on the performance of the air suspension and fitted the performance curve of the pneumatic ball valve. Sifang Rolling Stock Research Institute of the Ministry of Railways has done a lot of research on SYS series pneumatic ball valves, given the general calculation formula for the stiffness of various pneumatic ball valves, and analyzed the influence of various design parameters on the suspension vibration of pneumatic ball valves. Yuan Liangming, et al. of the Academy of Railway Sciences, applied the theories of aerodynamics and engineering thermodynamics to derive the mathematical model for vertical dynamic performance analysis of pneumatic ball valves. Li Fu of Southwest Jiaotong University and others established the physical model of pneumatic ball valve by using the theory of thermodynamics and fluid mechanics, and proposed the calculation method of parameters of pneumatic ball valve. The engineering college of Nanjing Agricultural University has conducted a lot of research on the dynamic performance of pneumatic ball valves with additional air chambers.
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