FACE SEAL Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: rotating friction ring is secured to the shaft. The stuffing, contacting with the ring, is received in the ring groove of the housing. The ring piston is mounted in the ring groove of the housing and fixed against rotation. The ring piston can interact with the stuffing and defines the space of the groove. The hydraulic cylinder is secured to the housing. The working space of the cylinder is in communication with the groove space and pressure gauge through the passageway made in the housing. The hydraulic cylinder is constructed as two coaxially arranged plungers with screw drives. The inner plunger is coupled with the drive through a spring. EFFECT: enhanced reliability. 2 cl, 2 dwg