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Dynamic study of a roller bearing in a planetary application considering the hydrodynamic lubrication of the roller/cage contact

2019; Elsevier BV; Volume: 149; Linguagem: Inglês

10.1016/j.triboint.2019.03.054

1879-2464

Martin Denni, N. Biboulet, Vincent Abousleiman, A.A. Lubrecht,

Mechanical Engineering and Vibrations Research

A new multi-body dynamics model for the simulation of roller bearings in planetary applications is presented. Analytical relations are used to model the lubricated contacts involved in the bearing. In particular, the vertical damping of the oil film in the roller/cage contact is taken into account, in order to get an accurate estimation of the forces endured by the cage. Results are presented for the case of a planet gear roller bearing in a turbofan planetary gearbox in terms of roller/ring and roller/cage forces and their influence on the instantaneous cage speed. The flexibility of the outer ring is also modelled using a finite element model; its influence on the results, i.e. on the maximum roller/ring force and on the bearing dynamics, is presented.