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Abstract

By using energy equations in the groove area, coupled with the momentum equation in the thin film land, an analytical method is proposed for examining the ram pressure effect on the pressure distribution in fully submerged multi-pad journal bearings and thrust bearings. The major characteristic of the present method is that the viscous effect of the fluid in the groove is better accommodated, compared with other previously reported methods (1–4). The proposed approach also enables the mechanism of the occurrence of the ram pressure, at the leading edge of a pad, to be investigated in a simple and effective manner. Insight into the appearance of the ram pressure is also obtained. The predicted results for the pressure distribution in both the groove and the thin film land, using the present method, showed good agreement with numerical results reported by other research groups (5, 6).

Keywords

groove effect ram pressure thin film lubrication thrust bearings multi-pad journal bearings

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Mechanism of Pressure Variation at the Leading Edge of a Bearing Pad

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