Mechanical seal exclusion and inspection Mechanical seal

Exclusion and inspection of mechanical seal

2021-08-20 09:57

Exclusion and inspection of mechanical seal

The working principle of the mechanical seal requires that there be no impurities in the mechanical seal. Before assembling the mechanical seal, the moving ring, static ring, shaft sleeve and other components should be completely removed. Key checks:

1. Whether there are scratches, cracks and other defects on the surface of the dynamic and static rings. The existence of these defects will cause tension and 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 uniform, pressure water will enter the sealing surface of the dynamic and static rings of the assembled mechanical seal, separate the dynamic and static rings, and the mechanical seal will fail. If necessary, tooling can be made for hydraulic test before assembly.

2. Check whether there are defects affecting the sealing of the dynamic and static ring seats. For example, whether there are defects such as scars on the joint surface of the dynamic and static ring seat and the dynamic and static ring sealing rubber ring.

3. Check whether the compensation spring of the mechanical seal is damaged and deformed, and whether the stiffness coefficient changes.

4. Check the sealing sleeve for defects such as burrs and groove marks.

5. Exclude and check whether there are cracks, pores and other defects in all sealing rubber rings, and measure whether the diameter of the rubber rings is within the tolerance limit.

6. For mechanical seals with pumping mechanisms, it is also necessary to check whether there are cracks, broken wires and other defects in the helix of the screw pump.