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To improve roller bearing efficiency, it is essential to identify the sources of power losses and quantify them in the design stage, considering different influencing factors. For oil-lubricated bearings, load-independent power losses () can be the dominant source of dissipation, especially for high-speed and abundant lubrication. In the present work,of a 32208 tapered roller bearing were measured experimentally under various operating conditions; that is, different rotational speeds, temperatures, and geometries of the oil reservoir. A numerical tool, based on computational fluid dynamics, to estimateand provide useful insights to investigate their causes has been developed in the OpenFOAM® environment. Numerical and experimental results show excellent agreement in most of the operating conditions investigated. Oil flows,contributions of different bearing components, and computational effort are discussed in the article.

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Load-Independent Power Losses of Fully Flooded Lubricated Tapered Roller Bearings: Numerical and Experimental Investigation of the Effect of Operating Temperature and Housing Wall Distances