END FACE SEAL Russian patent published in 2005 - IPC

FIELD: mechanical engineering; sealing facilities.

SUBSTANCE: proposed end face seal contains stationary and rotating rings forming friction pair, each provided with metal holder and fitted-in friction ring. Secondary seals are made in form of elastic rings. Guides, springs and rotating ring fastener of end seal are arranged on smooth shaft. Holder of stationary ring is provided with grooves along outer cylindrical surface coming to end face surface nearest to friction ring. Clearance between inner surface of friction ring and surface enclosed by said ring is not less than maximum play of shaft. Secondary seal of rotating ring is located between inner end face of holder and end face of fastener of end face seal. Clearance "B" is formed between other end faces of rotating ring holder and corresponding end faces of end face seal fastener whose value exceeds value of complete compression of secondary seal ring. End face seal rotating ring fastener is geometrically balanced relative to axis of rotation of shaft and it consists of free parts offering no resistance in process of their fitting of smooth shaft.

EFFECT: improved reliability of seal.

3 cl, 5 dwg