Bearings – Linear bearing – Fluid bearing
Patent
1996-08-16
1997-12-02
Hannon, Thomas R.
Bearings
Linear bearing
Fluid bearing
384100, F16C 3206
Patent
active
056928386
ABSTRACT:
An aerostatic bearing comprises a bearing base having a plurality of first through-holes for air intake, a bearing clearance being formed between the bearing surface and the thrust shaft, and a self-controlled restrictor disposed so as to form a restricting spacing with the reverse surface of the bearing base, the self-controlled restrictor being adapted for automatically adjusting the flow rate of air supplied to the bearing surface corresponding to the variation of the pressure on the bearing surface. The self-controlled restrictor has a restricting disc and a circular leaf spring. The restricting disc has a second through-hole at the center. The restricting disc is held by an O ring that also functions as a fluid sealing. The second through-hole is adapted for supplying air to the restricting spacing. The circular leaf spring is integrally formed with the restricting disc of a bottomed cylindrical member. Air supplied from the second through-hole to the restricting spacing flows as a diverging flow. Thus, a restoring force is applied corresponding to the deviation of the angle of the restricting disc.
REFERENCES:
patent: 3799628 (1974-03-01), Van Gaasbeek et al.
patent: 4080009 (1978-03-01), Marathe et al.
patent: 4413864 (1983-11-01), Phillips
patent: 4521121 (1985-06-01), Klein et al.
patent: 4560213 (1985-12-01), Enderle et al.
patent: 4719705 (1988-01-01), Laganza et al.
Transactions of the ASME, Journal of Lubrication technology, Department of Mechanical Engineering--University of Natal, South Africa, Jan. 1977, "Static and Dynamic Performance of an Infinite Stiffness Hydrostatic Thrust Bearing", N. Tully, pp. 106-112.
Nakamura Tetsuo
Okamoto Kenji
Yoshimoto Shigeka
Hannon Thomas R.
Mitutoyo Corporation
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