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Abstract
A gas bearing with a bi-directional hydrodynamic geometry is presented and analyzed. The configuration considered is an equally spaced set of alternating land and radial groove sectors, together forming a bearing surface.
The typical operating gap of the bearing is very small and a predominant laminar viscous flow field is assumed. The Reynolds equation is therefore used to describe the flow field. A parametric study of the controlling equations shows that four dimensionless geometric parameters in conjunction with the bearing number fully define the problem.
A simplified one-dimensional and a more complete two-dimensional steady-state analyses are performed to optimize the governing parameters for maximum load carrying capacity and maximum film stiffness.
This study shows that the performance prediction capability of the one-dimensional model is overly conservative and not satisfactory, but that its parametric optima are in favorable agreement with the two-dimensional analysis results.
The load carrying capacity of the bi-directional bearing is shown to be comparable to that of a Rayleigh step or plain slider bearing. This design offers the great advantage of independence of direction of shaft rotation.
Presented at the 45th Annual Meeting In Denver, Colorado May 7–10, 1990
Notes
Presented at the 45th Annual Meeting In Denver, Colorado May 7–10, 1990