Mechanical seal technology requirements |
Ring and seal ring is a general term stationary ring (below), are the most important elements of mechanical seals. Sealing ring largely determine the mechanical seal performance and life, so it made a number of demands.
Has sufficient strength and stiffness
Under operating conditions (such as pressure, temperature and sliding speed, etc.) are not damaged, deformed should be as small as possible, while still maintaining tightness working conditions fluctuate. Especially the seal faces must have sufficient strength and corrosion resistance to ensure that the product has a satisfactory life.
Good heat shock resistance
For this purpose, require materials with a high thermal conductivity and a small coefficient of linear expansion, and will not crack when subjected to thermal shock.
The smaller coefficient of friction
The sealing ring should be smaller to match the coefficient of friction.
Good self-lubricating
Work in the event of a short period of dry friction, does not damage the seal faces. Therefore, the sealing ring must have good self-lubricating, sealing ring material and sealing fluid also has good wettability.
Simple structure
Seal ring structure should be simple and symmetrical, with priority to the overall structure, may also be combined (eg inlay mounted) sealing ring, try to avoid spraying the end face sealing structure.
Easier processing and manufacturing sealing ring
To facilitate installation and maintenance, the price should be low.
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