Seals Sealing Principle and Method
Mechanical Seals Sealing Principle
To understand sealing, you must first understand leakage.
There are three types of leaks:
Leakage between the sealing surface gaps
Leakage of the sealed fluid through the capillaries of the seal material
Diffusion: It refers to the transfer of substances through the gap or the capillary of the material under the action of the concentration difference.
Seals Sealing Method
The sealing methods are roughly as follows
Minimize the number of places where seals are set
Blocking and isolation
Elicit or inject
Increase leakage resistance
Add work elements in the channel
A variety of sealing method combinations
Gasket seals, packing seals, mechanical seals, non-contact seals, and fluid-injection plugging under pressure are common forms of sealing.
Among them, the packing seal should be the most common, and it also includes soft packing, hard packing and formed packing.
Formed packing seals include common O-rings, Y-rings, oil seals, and more.
Non-contacting seals include gap seals, labyrinth seals, floating seals, dynamic seals, magnetic fluid seals and hermetic seals.