Non-contact type seal device for turbocharger

Details Non-contact type seal device for turbocharger Non-contact type seal device for turbocharger

1985-06-28

1987-02-24

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277133, 277203, F16J 15447

Patent

active

046452133

ABSTRACT:
A non-contact type seal device for a turbocharger in which lubricating oil is prevented from leaking into the compression chamber of the turbocharger over the entire range of rotational speeds thereof. The seal device of the invention includes a retainer mounted in a compression chamber of a housing of the turbocharger, a collar attached to a compressor wheel mounting portion of the rotor shaft of the turbocharger, and a ring provided on an inner peripheral surface of the retainer. An annular groove receiving the ring is formed in the outer peripheral surface of the collar. A first gap is formed between the outer peripheral surface of the collar and the inner peripheral surface of the retainer, while a second gap is formed between the inner surface of the annular groove and each of the inner and outer end surfaces of the ring. A threaded groove is formed in the inner peripheral surface of the retainer in opposition to the outer peripheral surface of the collar.

REFERENCES:
patent: 4296934 (1981-10-01), Atkin
patent: 4523763 (1985-06-01), Asano et al.

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