Controlled aperture seal with drag pad

Details Controlled aperture seal with drag pad Controlled aperture seal with drag pad

1976-09-17

1978-05-09

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277216, F16J 1530

Patent

active

040883299

ABSTRACT:
A carbon ring seal for a shaft rotating at high speed is capable of preventing high temperature, high pressure gas from entering the oil system. The carbon seal is constructed so that at ambient temperature it works as a controlled gap seal, but when the seal runner reaches its full thermal growth the seal then functions as a positive contact seal. The carbon seal ring is not pinned against rotation, but rotation is limited by means of an integral drag pad. The seal housing is provided with a plurality of calibrated holes for predetermined internal pressurization and cooling.

REFERENCES:
patent: 3190661 (1965-06-01), Wahl et al.
patent: 3964753 (1976-06-01), Junker et al.

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