Static pressure bearing device

Details Static pressure bearing device Static pressure bearing device

1994-02-14

1995-01-17

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384 1, 384 12, 384902, F16C 3206

Patent

active

053820959

ABSTRACT:
An apparatus for preventing the self-excited vibration of a static pressure bearing device includes a movable bed and a porous pad. The movable bed is noncontactly supported by the static pressure of pressurized fluid spouted from the porous pad toward the surface of a fixed bed. The porous pad is designed such that the natural frequency of a vibration system including the movable bed is regulated so that among the fluctuation components of the static pressure when the dimension of a bearing gap varies periodically, a periodic fluctuation component having a phase delay of 90.degree. relative to a decrease in the dimension of the bearing gap may be positive and of a frequency equal to the aforementioned natural frequency.

REFERENCES:
patent: 4569562 (1986-02-01), Sato et al.
patent: 4744675 (1988-05-01), Sakino et al.
patent: 4838710 (1989-06-01), Ohta et al.
patent: 5064297 (1991-11-01), Tanaka et al.
patent: 5184055 (1993-02-01), Ohishi et al.

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