Shaft seal assembly

Details Shaft seal assembly Shaft seal assembly

1978-11-06

1981-03-24

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 27, 277 53, F16J 1540

Patent

active

042576172

ABSTRACT:
A shaft seal assembly comprises contact seal rings which are inserted into a recess formed within labyrinth seal rings encompassing the shaft. The contact seal rings are adapted to be in sealing engagement with the shaft when the shaft is not rotating or the shaft speed is relatively slow. The contact seal rings are moved radially outward with respect to the rotary shaft when the shaft speed is increased. Buffer liquid generates the force to move the contact seal rings radially outward from sealing engagement with the shaft and at the same time establishes a barrier for process fluid when the shaft speed is increased.

REFERENCES:
patent: 3026112 (1962-03-01), Mayer
patent: 3815926 (1974-06-01), Vore
patent: 4114058 (1978-09-01), Albaric

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