SEALING UNIT FOR ROTATING SHAFT Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: drive 1 of shaft 10 is mounted on housing member 6 having ports. Shaft 10 is connected with shaft 11 of a mixer. Shaft 11 passes through cover 2 of apparatus 5 coupled with neck 4. An auxiliary seal is mounted on shaft 11. Member 6 is mounted on cover 2. The ports are arranged in the zone of the connection of shaft 10 with shaft 11 and tightly closed with detachable covers or axially-movable cylinder for permitting its locking at end positions. The auxiliary seal is made up as casing 12 mounted for axial movement and tightened by shaft 11 and coupled with flange 25 provided on shaft 11. The flange is spring loaded by fastening members. Cover 2 is provided with pressing members for moving casing 12 up to a contact with the seal member positioned on neck 4. . EFFECT: enhanced reliability. 4 dwg