An Overview Of The Principle Of A Mechanical Seal

Mechanical seal is a shaft sealing device that relies on one or several pairs of end faces perpendicular to the shaft to slide relative to each other, and is kept attached and fitted with auxiliary seals under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism to achieve leakage resistance.

The commonly used mechanical seal structure is composed of static ring (static ring), rotating ring (moving ring), elastic element spring seat, set screw, rotary ring auxiliary sealing ring and static ring auxiliary sealing ring and other components, and the anti-rotation pin is fixed on the gland to prevent the static ring from rotating.

Rotating and stationary rings are often referred to as compensation rings or non-compensating rings depending on whether they have axial compensation capabilities.