Shaft seal with both hydrostatic and hydrodynamic pressure parts

Details Shaft seal with both hydrostatic and hydrodynamic pressure parts Shaft seal with both hydrostatic and hydrodynamic pressure parts

1984-11-07

1986-12-30

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 18, 277 24, 277 27, 277 59, 277 81R, F16J 1534, F16J 1548

Patent

active

046324020

ABSTRACT:
A shaft seal for a gas pumping device comprising a mechanical seal (5,6) and a labyrinth seal in form of a sliding bearing (4). A chamber (7) between the mechanical seal and the sliding bearing is fed with lubricant for the bearing at a pressure being higher than the gas pressure on the other side of the mechanical seal so that there is no leakage of gas past the mechanical seal.

REFERENCES:
patent: 2284465 (1942-05-01), Wood
patent: 3005518 (1961-10-01), Jassniker
patent: 3926442 (1975-12-01), Mu277 27

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