Eventos Anais de eventos
DINAME2019
DINAME2019
Load distribution in cylindrical roller bearing with EHD lubricated contact force
Submission Author:
Natália Akemi Hoshikawa Tsuha , SP
Co-Authors:
Natália Akemi Hoshikawa Tsuha, Fabio Nonato, Katia Lucchesi Cavalca Dedini
Presenter: Natália Akemi Hoshikawa Tsuha
doi://10.26678/ABCM.DINAME2019.DIN2019-0052
Abstract
In roller bearings, elastohydrodynamic (EHD) lubrication is presented in contacts between rolling elements and raceways. The objective of this work is to study the effect of the EHD contact forces in load distribution of cylindrical roller bearings in contrast to classic Hertzian contact. The EHD line contact force model is based on elastohydrodynamic stiffness and EHD constant surface separation force. These force parameters are obtained by solving numerically the full EHD system of equations. Subsequently, the force equilibrium in cylindrical roller bearing is evaluated. The roller bearing is simulated at 5000 rpm and under a radial load of 50 kN with different amount of clearance. The application of EHD contact force model impacts the load distribution in cylindrical roller bearings and the major influence is related to the displacement of the roller elements. The variation of displacement amplitude indicates that the inclusion of EHD lubricated contact in roller bearings can affect the response in rotor dynamic.
Keywords
cylindrical roller bearing, elastohydrodynamic lubrication, contact force, EHD stiffness, load distribution
