Noncontacting face seal

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

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Details

277 27, 277 81R, F16J 1534

Patent

active

052247147

ABSTRACT:
A noncontacting face seal has a stationary sealing ring and a rotating sealing ring with opposed radially extending sealing surfaces for restricting a fluid flow from a high pressure fluid side to a low pressure fluid side. The rotating sealing ring is moved out of contact with the stationary sealing ring due to hydrostatic force from the fluid. The noncontacting face seal comprises spiral grooves formed in one of the sealing surfaces and extending from a low pressure fluid side to a high pressure fluid side in a radial direction so as to pump fluid from the low pressure fluid side towards the high pressure fluid side, and a spaced portion formed in one of the sealing surfaces and extending inwardly from one circumference of the sealing surface at the high pressure fluid side so as to introduce fluid in the high pressure fluid side between the sealing surfaces.

REFERENCES:
patent: 3347552 (1967-10-01), Frisch
patent: 3499653 (1970-03-01), Gardner
patent: 3675935 (1972-07-01), Ludwig et al.
patent: 3744805 (1973-07-01), Heinrich
patent: 3767212 (1973-10-01), Ludwig
patent: 3804424 (1974-04-01), Gardner
patent: 3905606 (1975-09-01), Florjancic
patent: 4099729 (1978-07-01), Nylykke
patent: 4212475 (1980-07-01), Sedy
patent: 4471966 (1984-09-01), Timmermans et al.
patent: 4884945 (1989-12-01), Boutin et al.
Journal of Basic Engineering, Sep. 1965, pp. 547-558, "The Static and Dynamic Characteristics of the Spiral-Grooved Thrust Bearing" S. B. Malanoski et al.
NASA Tech Brief, Jul. 1968 (Brief 68-10270, Category 05).

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