The floating ring bearing(FRB)casing usually contains a deep circumferential oil-groove or several axial grooves for the increase of flow rate.However,the existence of the oil grooves complicates the boundary of the oil film.Be-cause the short bearing model is difficult to handle complex boundary conditions and the calculation efficiency of the nu-merical method is extremely low,two oil film force models,the fluid force database method(FFDM)and the separation of variable method(SVM),were introduced and developed to deal with complex boundary problems of the FRB.Considering the complex boundary introduced by the axial groove,the database of oil-film force and shearing force with three-dimen-sional structure was established based on FFDM.Considering the complex boundary introduced by the circumferential groove,the analytical expression of the oil-film force was derived based on SVM.The accuracy and efficiency of the pro-posed methods for FRBs was validated through comparing the numerical results using finite difference method under same conditions.
关键词
浮环轴承/油膜力模型/分离变量法/流体力数据库法/复杂边界条件
Key words
floating-ring bearing/oil-film force model/separation of variable method/fluid force database method/com-plex boundary condition
维普
万方数据