Contact-less seal and method for making same

Details Contact-less seal and method for making same Contact-less seal and method for making same

1992-05-18

1993-06-29

Bertsch, Richard A.

Pumps

Expansible chamber type

418141, 92162R, 277215, 277 53, F04B 1900

Patent

active

052228797

ABSTRACT:
A contact-less seal apparatus including a first surface and a closely adjacent second surface with a space defined therebetween. A high pressure fluid region exists on a first side of the space. A low pressure fluid region exists on a second side of the space. A plurality of discrete expansion chambers are integrally formed in at least one of the first and second surfaces within the space to limit fluid flow from the high pressure fluid region to the low pressure fluid region. The expansion chambers may be formed on an axial end of a rolling piston, side and end faces of a vane, lateral faces of a reciprocating piston or other elements where a contact-less seal is highly desirable to improve sealing capability and effectiveness.

REFERENCES:
patent: 1016561 (1912-02-01), Grabler
patent: 4314531 (1982-02-01), Bruni
patent: 4629403 (1986-12-01), Wood
ASME Article 88-Trib-40, Experimental Results for Labyrinth Gas Seals with Honeycomb Stators, Authors--D. Childs, D. Elrod and K. Hale--Dec. 1988.
ASME Article, Annular Honeycomb Seals, Authors L. Hawkins, D. Childs and K. Hale--Dec. 1988.

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