What is the definition of mechanical seal?
A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage (e.g. in a plumbing system), containing pressure, or excluding contamination.
The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets.
Why mechanical seal is used in pumps?
When a pump operates, the liquid could leak out of the pump between the rotating shaft and the stationary pump casing.
Since the shaft rotates, preventing this leakage can be difficult. Earlier pump models used mechanical packing (otherwise known as gland packing) to seal the shaft.
The mechanical seals help sealing the rotating part of the shaft against the stationary part of the pump housing.
Thus the mechanical seals are the devices that form the packing between the rotor and the stationary part of the centrifugal pumps to prevent the leakage of the fluid being pumped by the pump.
Post time: Jul-25-2018