Seal assembly for rotating shafts

Details Seal assembly for rotating shafts Seal assembly for rotating shafts

1981-12-02

1983-11-08

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 30, 277 65, F16J 1534

Patent

active

044138300

ABSTRACT:
A seal assembly for rotating shafts particularly for sterntube seals for ps comprises two slide rings mounted in a receiving ring and pressed against a counter-ring by means of the surrounding sea-water. Between the slide rings an annular space is formed into which a liquid medium is let. The outer slide ring being a hydrostatic seal is lifted by the liquid medium in the annular space against the force of a spring in the receiving ring so that a small amount of the liquid medium leaks out to lubricate the slide rings and to prevent entering of abrasive particles. The inner slide ring is a hydrodynamic seal and is urged into contact with the counter-ring by the hydrostatic head of the sea-water surrounding the seal assembly. The receiving ring is guided in the housing or on the shaft with some clearance so that the faces of the slide rings can maintain a position parallel to the counter-ring.

REFERENCES:
patent: 3050310 (1962-08-01), Kuiken
patent: 3311381 (1967-03-01), Pech
patent: 3642289 (1972-02-01), Basham et al.
patent: 3926442 (1975-12-01), Muller

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