Common faults of mechanical seal of emulsifying machine

Emulsion machineThe commonly used sealing method is mechanical seal, which varies according to the material, structure and service life. What should I do if the seal leaks during use and how to deal with it? Leakage is a common failure of the mechanical seal of the emulsifier. The causes of leakage are generally corrosion, abnormal process fluctuation, material selection errors, etc. could cause a leak. In the production equipment, the leakage events of the commonly used conveying mechanical pump also abound.

1. Corrosion of metal ring

The metal ring itself does not have anti-corrosion ability. The surface of the chemical emulsifying machine will be corroded when it directly contacts the corrosive medium, and strange noise, leakage, wear and other phenomena will appear in the initial stage. Corrosion will spread to the interior at a certain rate. Under the action of external force, the metal ring will undergo stress deformation, and the exposed part after deformation is the hardest hit area of corrosion, and gradually affects other areas through weak links, resulting in mechanical seal leakage.

2. Corrosion of non-metallic ring
The corrosion of the graphite ring is also one of the important reasons for the small mechanical seal. High cross-section temperature, improper selection of impregnation resin and insufficient depth of impregnation resin are all causes of graphite ring corrosion. When the graphite ring is in the oxidizing medium, when the cooling is not good or friction occurs, the environment will cause the oxidation reaction between the graphite and the oxidizing medium, and the end face will lose its performance.

3. Corrosion of auxiliary sealing ring and contact
Different materials have different corrosion resistance. The material of the auxiliary sealing ring is generally made of elastic rubber, and the surface of the rubber will become extremely rough after being corroded and lose its original elasticity. And the high temperature resistance of rubber is relatively poor, generally not more than 200 degrees. The parts in contact with the auxiliary seal ring are in a relatively static state, and the cracks and friction between them will be the cause of corrosion, and the corrosion surface is generally wider and deeper.