CENTRIFUGAL PUMP END FACE SEAL Russian patent published in 2000 - IPC

FIELD: mechanical engineering; pumps. SUBSTANCE: end face seal has movable bushing secure don pump shaft and rigid sealing rings, one of which is installed for rotation and the other is fixed. First of the rings is coupled with movable bushing, and the other, with hub of cup by means of pins rigidly secured in bushing and hub and freely fitted in rings. Cup and hub are spring-loaded. Resilient shock absorbers are installed between ring and bushing and between ring and hub. Ring and bushing, and ring and hub, respectively, are intercoupled by means of self- sealing elastic collars. Owing to use of resilient shock absorber, self-sealing collars and hinge coupling of sealing rings, fixed sealing ring more accurately followed end face runout of rotating sealing ring, and vibration of sealing rings in end face plane takes place always in closed position. EFFECT: increased service life, improved operation reliability, reduced labour input in manufacturing and increased operating pressure. 2 cl, 8 dwg