MAGNETIC FLUID SEAL Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: pole pieces embrace a rotating shaft. A plain bearing is mounted between magnetic units. An annular magnetic core is mounted between inner axially magnetized pole pieces of the magnetic units forming with the shaft working clearances filled with a ferromagnetic fluid. The surfaces of the inner pieces adjacent to the plain bearing are made conical with opposed cone vertexes. EFFECT: improved structure. 2 cl, 1 dwg