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News

Principle of floating seal

  • Author:Alice
  • Release on :2020-08-19
Floating seal is a kind of non-contact sealing. Structure and sealing principle are: floating ring has some space with the rotary-axis, it can float, but it can't rotate with the axis, it floats in the direction of radial sliding, and maintain eccentric with the axis center under the effect of gravity. When the axis rotates, external sealing fluid (oil) input floating oil seal, oil film formed in the axis clearance with the floating seals. Due to the effect of oil power produced by axis rotating, makes the oil film has certain pressure, keep floating seal automatically setting with the axis center, so that the clearance greatly decreases, and effectively stop fluid leakage. It has the advantage of stable, reliable, long life. With wide sealing work parameters (pressure to 30 million mpa, working temperature is -100 ~ 200 ℃). Especially suitable for sealing of gas in the centrifugal compressor, which can guarantee the atmospheric environment not leak, suitable for inflammable, explosive, toxic, precious gas sealing. Defect is: high floating seal processing requirement, special sealing oil system; inevitable internal leak, but is still in the nature of inner loop of leakage, has qualitative difference with the mechanical sealing leakage.

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