Oil Film Thickness measurements in a Dynamically Loaded Journal Bearing—A Comparison of Measured and Calculated Minimum Oil Film Thickness with Newtonian Lubricating Oils

As previously reported an experimental apparatus has been built that allows direct measurement of the oil film thickness in a bearing that is subjected to dynamic loads and shaft speeds representative of those occurring in automobile engine connecting-rod, big-end bearings. The measurement system allows the locus of journal centers to be plotted within the bearing clearance circle while the bearing is subjected to dynamic loads. In comparison with making similar measurements in an engine, this apparatus allows accurate measurements while the oil film is subjected to carefully controlled conditions representative of those in an engine

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