Temperature and Adhesion Influence on the Microbearings Operating Parameters

Abstract:

In presented paper are elaborated the preliminary problems of thermo-hydrodynamic theory of lubrication for dependences between temperature, adhesive forces, and oil dynamic viscosity, in micro-scale inside super thin cylindrical boundary layer arising between two cooperating grooved cylindrical surfaces. In cylindrical micro-bearings are visible the large gradients of temperature changes and adhesion changes in very thin gap height direction. Hence the oil dynamic viscosity changes significantly in gap height direction. This fact implies the visible oil flow velocity changes and friction forces and the hydrodynamic pressure changes during the micro-bearing exploitation. Up to now the influence of adhesion forces simultaneously with temperature on oil viscosity changes and next on hydrodynamic pressure and load carrying capacity changes in cylindrical micro-bearing gap were not considered in analytical and numerical way.

• Periodical: Solid State Phenomena (Volume 199)
• Pages: 176-181
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.199.176
• Online since: March 2013
• Authors: Krzysztof Wierzcholski, Andrzej Miszczak
• Keywords: Grooved Surfaces, HDD Microbearing, Oil Viscosity Changes in Gap Height

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