The mechanical seal is a sealing device composed of two sealing elements (static ring and moving ring) perpendicular to the shaft, smooth and flat surfaces that fit each other and rotate relative to each other. It relies on the pressure of the sealing medium to generate an appropriate pressing force on the contact surface (end surface) of the rotating dynamic ring and the static ring so that the two end surfaces are tightly combined, and a very thin liquid film is maintained between the end surfaces to achieve sealing. purpose. This layer of the liquid film has hydrodynamic pressure and static pressure, which play the role of lubrication and balanced force.
Cleaning and inspection of mechanical seals
1. The working principle of the mechanical seal requires that there are no impurities inside the mechanical seal. Before assembling the mechanical seal, thoroughly clean the moving ring, static ring, shaft sleeve, and other components.
2. Check whether there are scratches, cracks, and other defects on the surface of the dynamic and static rings. The existence of these defects will cause serious leakage of the mechanical seal. If conditions permit, special tools can be used to check whether the sealing surface is flat. If the sealing surface is not flat, the pressure water will enter the sealing surface of the dynamic and static rings of the mechanical seal after assembly, separate the dynamic and static rings, and the mechanical seal will fail. If necessary, tooling can be made for hydrostatic test before assembly.
3. Check whether the dynamic and static ring seat has defects that affect the sealing. For example, whether there are defects in the mating surface of the dynamic and static ring seat and the dynamic and static ring sealing ring.
4. Check whether the mechanical seal compensation spring is damaged and deformed and whether the stubborn coefficient changes.
5. Check whether there are burrs, groove marks, and other defects in the sealing shaft sleeve.
6. 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 tolerance range.
7. The mechanical seal with the pumping mechanism should also check whether the screw of the screw pump has defects such as cracks and broken wires.
The above is about the cleaning of mechanical seals, I hope to help everyone. Akman Seals is a supplier of mechanical seals that sells products with guaranteed quality and reasonable price, which are worth choosing. If you are interested in mechanical seals, you can pay attention to our website.
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