How to check whether the automobile air valve works well?
The air butterfly valve products of Shanghai Dongfeng Pump Valve Factory are mainly used on the bases of buses, luxury cars, trucks, commercial vehicles, rail cars, industrial machinery, industrial equipment, etc. Dongfeng welcomes new and old customers to call and inquire: 021-60344211 air butterfly valve electric butterfly valve is mainly used to rapidly attenuate the vibration of the frame and body, and improve the smoothness and comfort of the vehicle. Generally, automobile suspension systems are equipped with electric butterfly valves. The electric butterfly valve is a vulnerable part during the use of the vehicle. 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. How to check whether the electric butterfly valve works well? Next, Dongfeng will share with you
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, appropriate lubricating oil can be added and the test can be carried out again. If the shell is hot, it means that the electric butterfly valve is lack of oil inside, and it should be filled with enough oil; Otherwise, the electric butterfly valve is invalid.
2. When the car is running slowly and emergency braking occurs, if the car vibrates violently, it indicates that there is a problem with the electric butterfly valve.
3. Press the bumper firmly and release it. If the car jumps 2-3 times, it means that the air butterfly valve is working well.
4. After confirming that the electric butterfly valve has problems or failure, check whether the electric butterfly valve has oil leakage or traces of obsolete oil leakage.
5. The oil seal washer and seal washer are broken and damaged, and the nuts of the oil storage cylinder cover are loose.
6. Dismantle the electric butterfly valve to make it stand upright, clamp the lower connecting ring on the bench clamp, and pull and press the shock absorber rod several times with force. At this time, there should be a stable resistance. The resistance of pulling up (restoring) should be greater than the resistance of pressing down. 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. Repair or replace the parts.
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, and a new seal should be replaced. If the oil leakage still cannot be eliminated, pull out the shock absorber rod. If you feel stuck or the weight is different, 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 from the automobile air valve, check whether the connecting pin, connecting rod, connecting hole, bushing, etc. of the electric butterfly valve are damaged, desoldered, cracked or fallen off. If the above inspection is normal, the electric butterfly valve shall be further disassembled 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 the 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 actual use, which is mainly caused by the collision between the electric butterfly valve and the steel plate butterfly valve, the frame or the shaft, the damage or falling of the rubber gasket, the deformation of the dust cylinder of the electric butterfly valve, and the lack of oil. The causes should be found out and repaired.
After the inspection and repair of the electric butterfly valve, the working performance test shall be carried out on a special test bench. When the resistance frequency is 100 ± 1mm, the resistance of its stretching stroke and compression stroke shall meet the requirements. For example, the maximum resistance of Jiefang CAl091 stretching stroke is 2156-2646N, and the maximum resistance of compression stroke is 392-588N; The maximum resistance of Dongfeng truck in stretching stroke is 2450-3038N, and the maximum resistance in compression stroke is 490-686N. If there is no test condition, we can also adopt an empirical approach, that is, use an iron bar to penetrate into the lower lifting ring of the electric butterfly valve, step on both ends of the ring with both feet, hold the upper lifting ring with both hands and pull it back and forth for 2-4 times. When it is pulled upward, the resistance is great, and when it is pressed downward, it does not feel laborious. Moreover, the resistance of stretching is recovered compared with that before repair, and there is no sense of emptiness, This indicates that the electric butterfly valve is basically normal.
The above is about how to check whether the electric butterfly valve works well. For more information on the purchase of air butterfly valves, please visit the official website of Shanghai Dongfeng Pump Valve Factory: //www.dongfengfamen.com//