COMBINED MAGNETO-FLUID SEAL Russian patent published in 2018 - IPC F16J15/43 

FIELD: machine building.

SUBSTANCE: invention relates to the combined shaft seal comprising arranged in the housing magneto-fluid and end seals, wherein the first one is made in the form of permanent magnet with pole attachments and ferromagnetic fluid in the working gaps, and in the magneto-liquid seal zone fixed to the shaft movable bushing and made of porous material with annular grooves on the inner surface stationary bushing are mounted. Stationary bushing is coaxially supported relative to the movable one due to installation inside the bushings of the ring from antifriction material, having annular grooves on the surface facing the bushings inner surface. End seal is created with the movable bushing end, and on the high pressure side made in the form of bellows movable element is installed, to which one of the ends a stationary bushing is rigidly and hermetically attached, consisting of pole attachments and magnetized in the radial direction permanent magnet, and its other end is rigidly and hermetically installed relative to the housing.

EFFECT: invention increases the device pressure drop.

1 cl, 2 dwg