Seal for a compressor and centrifugal compressor equipped...

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

Reexamination Certificate

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Details

C277S359000, C277S360000, C277S361000, C277S401000

Reexamination Certificate

active

06959929

ABSTRACT:
A seal for a rotary compressor comprises a casing, at least one assembly having a rotating seal face ring which rotates as one with a sleeve intended to be mounted on a shaft of the compressor and of a stationary seal face ring mounted on the casing, the seal face rings being urged to press against one another via their rubbing face. The seal design further incorporates fluid circulation for heating leaks of compressible fluid conveyed by the compressor that occur between the seal face rings, this fluid circulation being formed in the casing and extending at least partially downstream of the seal face rings with respect to the direction of flow of the fluid stream.

REFERENCES:
patent: 3556538 (1971-01-01), Heinz
patent: 3804424 (1974-04-01), Gardner
patent: 3811687 (1974-05-01), Honold et al.
patent: 3926442 (1975-12-01), Muller
patent: 4196911 (1980-04-01), Matsushita
patent: 4613141 (1986-09-01), Heinen
patent: 4872689 (1989-10-01), Drumm
patent: 5137116 (1992-08-01), Von Bergen et al.
patent: 5156523 (1992-10-01), Maier
patent: 5217233 (1993-06-01), Pecht et al.
patent: 5421593 (1995-06-01), Aritsubo et al.
patent: 5718560 (1998-02-01), Lorenzen
patent: 6565095 (2003-05-01), Meacham
patent: 0 654 607 (1995-05-01), None
patent: 0 781 948 (1997-07-01), None

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