Eccentric face seal with asymmetric closing force

Details Eccentric face seal with asymmetric closing force Eccentric face seal with asymmetric closing force

1991-08-15

1993-01-19

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 961, F16J 1534

Patent

active

051801728

ABSTRACT:
An eccentric face seal for rotary machines in which the closing force of the seal faces towards one another is asymmetric. The asymmetric closing force is utilized to produce corresponding variations in the face seal gap which tends to produce fluid flow across the seal face in a direction opposite to the leakage produced by the pressure difference, and thereby eliminate or reduce leakage. Closing forces can be applied by at least a pair of springs providing different compressive forces or by hydraulic actuation in which the total combined forces can readily be made to vary with fluid operating pressure. In one embodiment the hydraulic actuation is provided by asymmetric pressure responsive areas of the rotor or stator.

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