Mechanical seal manufacturer Introduction of principles and requirements

Mechanical seal refers to a sealing device formed by two sealing elements sticking together and rotating relative to each other on a smooth and straight surface perpendicular to the axis. It is usually composed of static ring, dynamic ring, spring loading device (including push ring, spring box), auxiliary sealing ring (dynamic ring sealing ring, static ring sealing ring) and other elements, and the anti rotation pin inside the anti rotation sleeve is fixed on the outer gland, To prevent the stationary ring from rotating.

The end faces of the moving ring and the stationary ring form a pair of friction pairs. The moving ring presses its end face against the end face of the stationary ring by the pressure of the liquid in the seal chamber, produces appropriate specific pressure on the end faces of the two rings, and maintains an extremely thin liquid film to achieve sealing. Therefore, from the structural point of view, the mechanical seal is mainly to change its axial seal that is very easy to leak into an end seal that is not easy to leak, In the actual operation process, the mechanical seal is not a separate component, but is combined with other parts to operate. At the same time, it can be seen from its basic principle that the normal operation of the mechanical seal must meet the following conditions:

(1) The displacement of pump shaft shall not be too large;

(2) The deflection of the pump shaft at the mechanical seal should be small. Only by meeting such external factors and good mechanical seal performance, can the ideal sealing effect be achieved.