Tips for keeping pneumatic ball valves at home?
In order to rapidly attenuate the vibration of the frame and body, and improve the smoothness and warmth of the vehicle, pneumatic ball valves are generally installed on the vehicle suspension system. At present, two-way acting cylinder pneumatic ball valves are widely used on vehicles.
Pneumatic ball valve is a vulnerable part in the process of automobile operation. The working quality of pneumatic ball valve will directly affect the stability of automobile driving and the life of other parts. Therefore, we should keep the pneumatic ball valve in good working condition. The following methods can be used to check whether the pneumatic ball valve works well.
1. Stop the car after driving 10km on the road with poor road conditions, touch the shell of the pneumatic ball valve with your hand. If it is not hot enough, it means that there is no resistance inside the pneumatic ball valve, and the pneumatic ball valve does not work. At this time, you can participate in the appropriate lubricating oil and then stop the test. If the shell is hot, the pneumatic ball valve is short of oil inside, and you should add enough oil; Otherwise, the pneumatic ball valve is invalid.
2. Press the bumper firmly, and then release it. If the car jumps 2-3 times, the pneumatic ball valve works well.
3. If the vehicle vibrates violently when it drives slowly and brakes in an emergency, the pneumatic ball valve is faulty.
4. Dismantle the pneumatic ball valve to make it upright, clamp the lower connecting ring on the bench clamp, and pull and press the valve rod several times with force. At this time, there should be stable resistance. The resistance of pulling upward should be greater than the resistance of pressing downward. If the resistance is unstable or no resistance, it may be the lack of oil inside the pneumatic ball valve or the damage of valve parts, and the repair or replacement of parts should be stopped.
After confirming that the pneumatic ball valve is defective or invalid, check whether the pneumatic ball valve can leak oil or has traces of obsolete oil leakage. The oil seal washer and seal washer are broken, and the nuts of the oil storage cylinder cover are loose.
If oil leakage is found, first tighten the nuts of the oil cylinder head. If the pneumatic ball valve still leaks oil, it may be that the oil seal and sealing washer are damaged and invalid. Replace them with new seals. If the oil leakage still cannot be eliminated, the valve rod shall be pulled out. If it feels stuck or different in weight, further check whether the clearance between the piston and the cylinder barrel is too large, whether the piston connecting rod of the pneumatic ball valve is bent, and whether the surface of the piston connecting rod and the cylinder barrel are scratched or pulled.
Assuming that the pneumatic ball valve has no oil leakage, check whether the pneumatic ball valve joint pin, joint rod, joint hole, bushing, etc. are damaged, desoldered, split or scattered. If the above inspection is normal, the pneumatic ball valve shall be further synthesized to check whether the fit clearance between the piston and the cylinder barrel is too large, whether the cylinder barrel is strained, whether the valve seal is good, whether the valve clack and valve seat fit tightly, and whether the extension ball valve of the pneumatic ball valve is too soft or broken. The method of grinding or replacing parts shall be adopted according to the situation.
In addition, the pneumatic ball valve will show the disadvantage of making noise in the theoretical application, which is mainly caused by the collision between the pneumatic ball valve and the steel plate ball valve, the frame or the shaft, the damage or scattering of the rubber pad, the deformation of the dust cylinder of the pneumatic ball valve, the lack of oil and other reasons, the cause should be found out and repaired.