A mechanical seal is a sealing device composed of two sealing elements (a stationary ring and a moving ring) that are perpendicular to the axis, with smooth and straight surfaces that adhere to each other and rotate relative to each other. It relies on the pressure of the sealed medium containerized mechanical seal to generate appropriate clamping force on the contact surface (end face) of the rotating dynamic ring and static ring, so that these two end faces are tightly combined, and the chemical pump mechanical seal maintains a very thin liquid film between the end faces to achieve the sealing purpose. This liquid film has both liquid dynamic pressure and static pressure, playing a role in lubricating and balancing forces.

One Cleaning and inspection of mechanical seals

The working principle of a mechanical seal requires that there be no impurities inside the mechanical seal. Thoroughly clean the moving ring, stationary ring, shaft sleeve and other components before assembling the mechanical seal.

2. Check whether there are scratches, cracks, and other defects on the surface of the dynamic and static rings. The presence of these defects in the textile printing and dyeing mechanical seal can 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, pressure water will enter the sealing surface of the dynamic and static rings of the assembled mechanical seal, separating the dynamic and static rings and causing the mechanical seal to fail. If necessary, fixtures can be made for hydrostatic testing before assembly.

3. Check whether there are any defects affecting the sealing of the dynamic and static ring seats. Whether there are defects on the mating surface between the dynamic and static ring seat and the dynamic and static ring sealing ring.

4. Check whether the mechanical seal compensation spring is damaged or deformed, and whether the resistance coefficient has changed.

5. Check the sealing shaft sleeve for defects such as burrs and grooves.

6. Clean and inspect all sealing gaskets for defects such as cracks and air holes, and measure the diameter of the gaskets to ensure it is within the tolerance range. Mechanical seals with pumping mechanisms should also be inspected for defects such as cracks and broken wires in the spiral line of the screw pump.