SEAL FOR ROTATING SHAFT Russian patent published in 2004 - IPC

FIELD: chemical engineering.

SUBSTANCE: seal has body connected with casing of chemical apparatus, elastic rings, and sleeve mounted on rotating shaft. Sleeve is coupled to elastic membrane connected with chemical apparatus casing. Elastic rings are arranged between sleeve and rotating shaft. Sleeve and seal body are equipped with cooling liquid channels. Sleeve has stop fixed in seal body or in chemical apparatus casing. Seal body has additional cooling liquid seal. Thrust ring is mounted on shaft and adapted for restricting displacement of sleeve along shaft. In case of faulty mounting of seal body relative to shaft axis and radial beat of shaft, such construction of seal eliminates influence of said faults upon its service life and tightness. Also, working fluid of chemical apparatus is prevented from getting into elastic ring and rotating shaft friction zone. Seals of such construction may be used with media having increased penetrability, as well as with polimerizable and thermally unstable media.

EFFECT: increased sealing efficiency, prolonged service life and wider range of media used.

3 cl, 4 dwg