Anti-Impact Performances of Aircraft Engine Spindle Bearings under Oil Injection Conditions

In order to solve the problem of impact resistance of the outer ring of the aero-engine main shaft bearing, a kind of hollow inner cooling structure like lotus root was proposed in this paper, and a dynamic model of the hollow inner cooling structure was established. The influence of parameters such as inlet pressure, oil density, hollow channel width and shape on the impact resistance performance of bearings was studied using fluid structure coupling analysis; The influence mechanism of different working conditions and parameters on bearing deformation and damping ratio was elucidated. The results showed that the changes in inlet pressure and lubricant density had almost no effect on the deformation and stress of the outer ring, but hollow channel width and channel shape had a significant impact on the deformation and stress of the outer ring; The change in lubricant density had no effect on the damping ratio of the outer ring; The inlet pressure, hollow channel width, and channel shape had a significant impact on the damping ratio of the outer ring. The research results were of great significance for improving cooling efficiency and impact resistance of spindle bearings.