COMBINED SHAFT SEAL Russian patent published in 2016 - IPC F16J15/40 

FIELD: machine building.

SUBSTANCE: invention relates to a combined sealing of shaft. Seal comprises a magnetic fluid and face seal, wherein first is made in form of a permanent magnet with pole attachments and ferromagnetic liquid in working gaps. In area of magnetic fluid seal moving bush fixed on shaft are installed and fixed sleeve from porous material with annular grooves on inner surface. Moving bush end is created with end seal and on side of high pressure there is a movable element made in form of bellows, one end of which is rigidly and tightly fixed sleeve is attached, and other end is rigidly and tightly relative to body.

EFFECT: invention increases compensated pressure drop.

1 cl, 2 dwg