Hydrodynamic shaft seal

Details Hydrodynamic shaft seal Hydrodynamic shaft seal

1980-02-07

1981-09-08

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277153, 277165, F16J 1532, F16J 1540

Patent

active

042880831

ABSTRACT:
A hydrodynamic shaft seal for use under both static and dynamic conditions features a sealing face having one static sealing surface at the non-liquid side of the seal and a dynamic sealing surface having a plurality of angular vanes forming chambers open to the liquid at the liquid side of the seal. An annular coil spring biases the static sealing surface into contact with the shaft under static conditions and controls its spacing under dynamic conditions during which the vanes propel liquid toward the liquid side of the seal.

REFERENCES:
patent: 3534969 (1970-10-01), Weinand
patent: 3633927 (1972-01-01), Van Deven
patent: 3913925 (1975-10-01), Gyory

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