Non-contacting mechanical face seal including fluid control syst

Details Non-contacting mechanical face seal including fluid control syst Non-contacting mechanical face seal including fluid control syst

1998-01-26

2000-12-05

Mah, Chuck Y.

Seal for a joint or juncture

Seal between relatively movable parts

Diverse and distinct dynamic seals

277304, 277306, 277400, 277388, F16J 1546

Patent

active

06155572&

ABSTRACT:
A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a first seal ring having a first seal face and a second seal ring having a second seal face. The first seal face further has a first portion and a second portion and the seal faces of the first and second seal rings are opposed to each other when assembled. The first seal ring or the second seal ring is adapted to rotate with the rotatable shaft, and the other seal ring is restrained from rotating. The seal is a non-contacting seal that provides for the introduction of a barrier fluid between the seal faces. A first surface of the first seal ring and a first surface of the second seal ring are exposed to the process fluid. An opening force is developed between the first and second seal faces that inhibits contact between the seal faces. The seal further includes a system for regulating the opening force on the seal face as a function of the difference between the pressure of the fluid introduced between the seal faces, i.e., the barrier fluid, and the pressure of the process fluid.

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