The sealing ring is a general term for the dynamic and static rings, and is the most important component of mechanical seals. The sealing ring largely determines the performance and lifespan of mechanical seals, therefore, some requirements are put forward for it.
(1) Sufficient strength and stiffness. Under working conditions (such as pressure, temperature, and sliding speed), it should not be damaged, and deformation should be minimized as much as possible. When working conditions fluctuate, it can still maintain sealing.
(2)The sealing end face should have sufficient strength and corrosion resistance to ensure a satisfactory service life under working conditions.
(3)The sealing ring should have good heat resistance and impact resistance. Therefore, it is required that the material has a high thermal conductivity and a small coefficient of linear expansion, so as not to crack when subjected to thermal shock.
(4)The matching of sealing rings should have a small coefficient of friction and good self-lubricating properties. The sealing ring material should also have good wettability with bee fluid. If short-term dry friction occurs during work, it will not damage the sealing end face.