Tips for self maintenance of electric butterfly valve?
In order to rapidly attenuate the vibration of the frame and body, and improve the smoothness and warmth of the car, the car suspension system is generally equipped with an electric butterfly valve. At present, the two-way action cylinder type electric butterfly valve is widely used in cars.
The electric butterfly valve is a vulnerable part in the process of vehicle operation. The operation of the electric butterfly valve will directly affect the stability of the vehicle and the life of other parts. Therefore, we should keep the electric butterfly valve in good working condition. The following methods can be used to check whether the electric butterfly valve works well.
1. Stop the car after driving 10km on the road with poor road conditions, touch the shell of the electric butterfly valve with your hand. If it is not hot enough, it means that there is no resistance inside the electric butterfly valve, and the electric butterfly 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 electric butterfly valve is short of oil, and you should add enough oil; Otherwise, the electric butterfly valve is invalid.
2. Press the bumper firmly, and then release it. If the car jumps 2-3 times, the electric butterfly valve works well.
3. If the vehicle vibrates violently when the vehicle runs slowly and brakes in an emergency, it indicates that there is a problem with the electric butterfly valve.
4. Dismantle the electric butterfly 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 electric butterfly valve or the damage of valve parts, and the repair or replacement of parts should be stopped.
After confirming that the electric butterfly valve has a problem or failure, check whether the electric butterfly 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 electric butterfly 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 electric butterfly valve is bent, and whether the surface of the piston connecting rod and the cylinder barrel are scratched or pulled.
If there is no oil leakage in the electric butterfly valve, check whether the electric butterfly valve connecting pin, connecting rod, connecting hole, bushing, etc. are damaged, desoldered, split or scattered. If the above inspection is normal, the electric butterfly 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 stretch butterfly valve of the electric butterfly valve is too soft or broken. The method of grinding or replacing parts shall be adopted according to the situation.
In addition, the electric butterfly valve will make a noise in theoretical application, which is mainly due to the collision between the electric butterfly valve and the steel plate butterfly valve, the frame or the shaft, the damage or scattering of the rubber gasket, the deformation of the dust cylinder of the electric butterfly valve, the lack of oil and other reasons. The reason should be found out and repaired.