Pneumatic ball valve can be used in many fields, but it is not suitable for all occasions. How should we choose the appropriate pneumatic ball valve?
I have sorted out the characteristics of pneumatic ball valve and its advantages and disadvantages for you before. Do you remember? It doesn't matter if I don't remember. I will review it for you later. The first thing is to talk about the scope of application of pneumatic ball valves.
When selecting pneumatic ball valve, we should first understand its characteristics, and then select it through the environment. The characteristics of pneumatic ball valve are that its shape can be designed as required, its stiffness can be adjusted, its damping ratio is greater than that of tension spring, its shear resistance, tensile resistance, compression resistance, and its device is simpler. Its defects are high natural frequency, short service life, and limited operating environment. Generally, the operating environment temperature should be controlled between - 30-70 ℃. For some chemical corrosive environments, pneumatic ball valves suitable for raw materials should be selected for use. At present, the main products suitable for producing pneumatic ball valves are: natural rubber, neoprene rubber, butadiene rubber; The market is full of pneumatic ball valves made of recycled rubber.
It is hard to handle without tension spring, nonlinear load compression ratio, rough surface, poor damping effect and easy to age. Remember to choose carefully to avoid purchasing such pneumatic ball valves. Because the pneumatic ball valve has the above characteristics, it is widely used on the bogie of the running part of the locomotive. Pneumatic ball valves used on electric locomotives include central support cone, axle box pull rod elastomer, side bearing stack, motor suspension pad, elastic wheel, elastic gear, air tension spring, bow block and ball hinge of transmission device, coupler buffer, etc.
The primary effect of the pneumatic ball valve used on the locomotive is to accept the contraction stress, shear stress and changing torque, as well as two or more stress combinations. All kinds of pneumatic ball valves have certain special functions and play an important role. The speed of the railway locomotive is constantly increasing, and the dynamic effect on the line is sharply increased, causing severe wear of the line, tire and components of the running part of the locomotive.