Logarithmic spiral raceway design enables axial self-locking and enhanced bearing performance

Fixed-curvature circular raceways induce dynamic friction angle oscillations, the primary drivers of ball axial skidding. This paper uses friction self-locking theory and elucidates how the geometric offset affects axial skidding. The dynamic variation laws of friction angles are established, and variable curvature radii of the logarithmic spiral raceway are developed to stabilize friction angles. At 10,000 r/min and a 4.4 kN load, the logarithmic spiral raceway reduces the temperature by 11.9%, the energy consumption by 24.2%, and the average wear mark width by 60% compared with circular raceways. These results demonstrate that logarithmic spiral raceways effectively suppress axial skidding via friction angle regulation, providing a reference for aerospace bearings in high-speed rotor systems.