Mechanical seal technology has many years of history, according to the different working principle, mechanical seal technology can be divided into static seal and dynamic seal two categories.
The static seal of mechanical seal refers to the seal between the joint surface of two relatively static parts; The dynamic seal of mechanical seal refers to the sealing technology between the joint surface of two relatively moving parts.
Mechanical seal, as a rotating shaft dynamic seal, is an important part to prevent leakage, save energy and control environmental pollution in the production of mechanical equipment. In recent ten years, mechanical sealing technology has developed greatly, and has been widely used in electric power, shipbuilding, aerospace, petrochemical and other fields. According to petrochemical industry statistics, 80% ~ 90% of centrifugal pumps use mechanical seals. Industrial developed countries, in the rotating machinery sealing device, the amount of mechanical sealing accounted for more than 90% of the total use of sealing. At present, mechanical seal has become the most important dynamic seal in fluid seal technology.