Magnetic liquid sealing device for sealing liquid

The invention discloses a magnetic liquid sealing device for sealing liquid, and belongs to the field of mechanical engineering sealing. The magnetic liquid sealing device comprises a spring seat (1), a set screw (2), a rotary shaft (3), a spring (4), a movable ring (5), an auxiliary sealing ring (6) of the movable ring, a first non-magnetic ring (7), an auxiliary sealing ring (8) of a first pole shoe, the first pole shoe (9), an annular permanent magnet (10), a non-magnetic-permeability screw (11), a second pole shoe (12), an auxiliary sealing ring (13) of the second pole shoe, a second non-magnetic ring (14), a static ring (15), an auxiliary sealing ring (16) of the static ring, an anti-rotating pin (17), a threaded end cover (18) and a shell (19). The magnetic liquid sealing device is arranged on an end surface, relative speeds of two types of liquid on a contact surface of the sealed liquid and the magnetic liquid are nearly zero, shearing movement between the magnetic liquid and the sealed liquid can be