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An investigation on the static performance of hydrodynamic wave journal bearings

The wave journal bearing was first reported by Dimofte In the early 1990's. The static behavior of a hydrodynamic wave journal bearing is present in this paper. It is found that the static performance is related to the design parameters including eccentricity ratio, wave number, wave amplitude ratio and wave position angle. It is shown by the numerical results that the influence of the wave number to the load capacity and attitude angle is significant. The load capacity of the wave bearing decreases with the rise of wave number when the wave amplitude ratio is lower than 0.1 under the assumption that the load is applying on the sleeve between the two groove. The wave bearing has a larger load capacity than the plain one in general, except that the wave amplitude ratio is less than 0.15 and the wave position angle is smaller than 20 degree. There is a minimum value of the load capacity as the increasing of wave position angle with wave amplitude ratio smaller than 0.15, while in the larger wave amplitude ratio situation, the load capacity rises as first and then decreases in the end as an increasing wave position angle.