Mechanical seal cleaning and inspection

Mechanical seal cleaning and inspection

The working principle of the mechanical seal requires that there are no impurities inside the mechanical seal. Before assembling the mechanical seal, completely clean the moving ring, static ring, shaft sleeve and other components. The main points are to check the following aspects: 1. Whether there are defects such as scratches and cracks on the surface of the dynamic ring, the existence of these defects will cause serious leakage of the mechanical seal. If possible, you can use special tools to check whether the sealing surface is flat or not. If the sealing surface is not flat, the pressure water will enter the dynamic ring sealing surface of the assembled mechanical seal, separate the dynamic ring, and the mechanical seal will fail. If necessary, the tooling can be manufactured and hydrostatically tested before assembly. 2. Check whether the dynamic ring seat has defects that affect the sealing. For example, whether there are defects such as scars on the surface of the dynamic ring seat and the dynamic ring sealing rubber ring. 3. Check whether the mechanical seal compensation spring is damaged and deformed, and whether the tenacity coefficient has changed. 4. Check whether there are defects such as burrs and groove marks on the sealed shaft sleeve. 5. Clean and check whether all sealing rubber rings have defects such as cracks and pores, and measure whether the diameter of the rubber ring is within the working tolerance range. 6. For mechanical seals with water pumping organization, it is also necessary to check whether the spiral of the screw pump has defects such as cracks and broken lines.