Bi-directional foil thrust bearing

Details Bi-directional foil thrust bearing Bi-directional foil thrust bearing

1995-06-20

1996-03-12

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

F16C 3206

Patent

active

054980828

ABSTRACT:
A bi-directional foil thrust bearing for use in a variety of turbomachinery devices and disposed between rotating and stationary members of the turbomachine. The thrust bearing comprises annular bearing stiffener, spring cluster, and follower spring disks, with each disk disposed coaxially about a centerline axis of the device. A plurality of generally trapezoidal foils are attached to the bearing stiffener disk and an equal number of generally trapezoidal spring sets are attached to the spring cluster disk. The bearing stiffener and spring cluster disks are configured to permit a predetermined rotation of the disks relative to one another such that each spring set is aligned with a trailing portion of a corresponding foil, regardless of the direction of rotation of the rotatable member of the device. Accordingly, conformity is provided between the bearing stiffness profile and the film pressure profile developed during the operation of the device. Each spring set includes a central portion attached to the spring cluster disk and a plurality of radially spaced spring members, with each spring member having first and second portions attached to and extending generally circumferentially away from opposing sides of the central portion.

REFERENCES:
patent: 4668106 (1987-05-01), Gu
patent: 4767221 (1988-08-01), Paletta et al.
patent: 5248205 (1993-09-01), Gu et al.
patent: 5318366 (1994-06-01), Nadjafi

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