Troubleshooting of vacuum pump of vacuum coating machine

Vacuum coating machine in the process of use, because of the complexity of the equipment and long time of work, there may be some failures, among which the vacuum pump is more prone to problems. This paper will discuss the fault treatment of vacuum pump in vacuum coating machine from the following aspects.

First, background introduction
Vacuum coating machine plays a very important role in modern industrial manufacturing, widely used in physics, chemistry, material science and industrial production fields. The vacuum pump is an important part of it, mainly used to create and maintain high vacuum degree. However, there may be problems during the use of vacuum pumps, such as pump vibration, leakage, excessive noise and so on. These problems will not only hinder the normal operation of the equipment, but also may cause equipment damage or even damage other related parts and components, resulting in heavy losses to the enterprise. Therefore, it is very important to deal with the failure of vacuum pump.
Ii. Failure cause
Oil deterioration or loss: The lubricating oil of the vacuum pump may deteriorate and pollute the oil due to long-term use or external environment factors, reducing the lubrication performance, and thus leading to the failure of the pump.
Poor air tightness: When the vacuum pump is in use, if the seal is not strict, the air will leak, resulting in the decrease of the negative pressure of the pump, the decrease of the pump efficiency, and even the loss of pump power resulting in the overheating of the pump.
Motor failure: from the mechanical point of view, the motor in the vacuum pump is prone to rotor eccentricity and bearing damage during its operation, which will affect the normal operation of the pump.
Chemical corrosion: The vacuum pump works in the atmosphere, and some chemical substances will react with the metal materials in the pump, causing pump damage.
System connection leakage: When the vacuum pump is connected to the system, the sealing of the connecting end is insufficient, which is easy to leak, affecting the pump's working effect and performance.
Three, troubleshooting
Replace the lubricating oil: If the lubricating oil deteriorates, we need to drain the oil as clean as possible and replace it with a new oil. In the process of replacement, the oil circuit should also be washed to remove all dirt and impurities. Improve the lubricating oil in the pump body, can improve the normal operation of the pump, make the pump more efficient.
Replace the seals: if the pump air tightness is poor, it is necessary to replace or repair the pump seals. Seals in the operation of the pump will lose the original sealing performance because of wear, damage and other reasons. The seal is often replaced or repaired by removing the entire pump body and then coating the seal with a popular paint. The paint prevents air leakage between the seal and the pump body.
Replace the motor: If the pump motor failure is serious, then there may be pump failure. In this case, a motor replacement is required. Motor tolerance, temperature, torque and other relevant accessories need to match the original pump model to ensure that the pump can run normally after the motor is replaced.
Prevent chemical corrosion: In order to prevent chemical reactions in the pump, appropriate pump material must be selected according to the working conditions. At the same time, the pump body is wrapped with anti-corrosion protective layer, which can prolong the service life of the pump.
Treatment of system connection leaks: If the tightness of the fastening joints of the pump connection system in this part is insufficient, the fastening spanner provided by the manufacturer and recommended can be used to tighten the connection according to the recommended specifications with appropriate torsion force. Applies to all fastening joints involved in sealing production. If the joint cannot be clamped properly, then the joint must be reinstalled or adjusted or abandoned.
Iv. Summary
In the process of working, the vacuum pump of vacuum coating machine may fail due to long time use or other unpredictable reasons. In the face of this situation, we should not blindly simply buy a new pump to replace directly, as long as the specific cause of the failure is found, reasonable and effective solution measures can achieve better recovery. After troubleshooting, regular maintenance should be carried out according to the service state of the equipment, so as to extend the service life of the equipment.