오일젯 윤활 조건에서의 고속 각접촉 볼베어링의 열탄성 모델링 및 해석에 관한 연구

Abstract

This paper presents an integrated thermo-mechanical model for analyzing angular contact ball bearings (ACBBs) operatingunder oil-jet lubrication. The proposed approach enables a comprehensive analysis of both the mechanical and thermalbehavior of the ACBB system. The proposed formulation employs a quasi-static approach to accurately calculate contactloads and heat generation, taking into careful consideration variations in internal clearance resulting from factors such assurface pressure, centrifugal forces, and thermal expansion. For the thermal analysis, a refined thermal network model isutilized. The proposed thermal model incorporates a newly derived correlation for the drag coefficient under oil-jetlubrication, which is obtained through high-fidelity computational fluid dynamics simulations. The validity of the proposedmodel is confirmed through comparison with experimental data. Furthermore, extensive simulations are conducted toinvestigate the impact of bearing fit-up and thermal variations on the performance of ACBBs.