Thermal compensation for fluid dynamic bearing using bimetal par

Details Thermal compensation for fluid dynamic bearing using bimetal par Thermal compensation for fluid dynamic bearing using bimetal par

1998-10-23

2000-05-23

Hannon, Thomas R.

Bearings

Rotary bearing

Plain bearing

384110, 384905, F16C 3206, F16C 1722

Patent

active

060658770

ABSTRACT:
A bimetallic part is formed from metals or comprises metals with different thermal expansion coefficients. A first element defines the part and defines one surface of the bearing gap and has a first coefficient of expansion and a second element is wholly or partially inserted into and constrained within the first element and having a different coefficient of thermal expansion so that as the temperature changes, the stress created by the differential expansion of the two elements will cause the overall part to deform elastically as a function of temperature. This deformation will cause the gap, the elements being properly selected, to narrow as temperature rises (and viscosity falls) and to widen as temperature falls (and viscosity rises).

REFERENCES:
patent: 5524985 (1996-06-01), Dunfield
patent: 5628569 (1997-05-01), Hayakawa et al.
patent: 5664889 (1997-09-01), Gustafson

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