An Analysis on the Structural Constraint Influence on Heat Transfer of Spindle Bearings

Although the structural constraint effect on bearing temperature was discussed by many researchers, the available thermal predictions are either very simple due to less coupling factors or too complex because of the extensive factors integrated. In addition, scholars usually only made some basic assumptions or analyses when developing these formulas. Hence, their findings, clearly, lack sufficient theoretical supports. This paper devotes to explore the structural constraint effect on bearing temperature. For this, the statistical analysis on the structure parameters of high-speed angular contact ball bearings was first implemented. Next a formula was constructed to implement the contrast of the heat transfer capacity between the axial and radial directions of bearing rings. The result provides a sound theoretical basis for the thermal evaluation model simplification.