Shaft seal for turbomachinery

Bearings – Rotary bearing – Plain bearing

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Details

60657, 277 3, 277 15, 277 29, 415168, 415175, F16C 3372, F01M 900

Patent

active

046066527

ABSTRACT:
A cryogenic turboexpander employing a rotor and a shaft fixed thereto including bearings rotatably supporting the shaft having a pressurized lubricating system. A labyrinth seal is positioned between the bearings and the rotor. A control valve is employed to sense differential pressure across a portion of the seal and regulate the pressure within a cavity between the seal and a near bearing.

REFERENCES:
patent: 3171354 (1965-03-01), Sohlemann
patent: 3420434 (1969-01-01), Swearingen
patent: 3670850 (1972-06-01), Swearingen
patent: 3831381 (1974-08-01), Swearingen
patent: 3937022 (1976-02-01), Swearingen
patent: 4005580 (1977-01-01), Swearingen

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