Eventos Anais de eventos
DINAME2019
DINAME2019
Investigation of nonlinear parameters of force on lubricated elliptical contact with load and rotation variations
Submission Author:
Letícia Bizarre , SP , Brazil
Co-Authors:
Letícia Bizarre, Laís Carrer, Katia Lucchesi Cavalca Dedini
Presenter: Letícia Bizarre
doi://10.26678/ABCM.DINAME2019.DIN2019-0053
Abstract
The development of optimized products through time-consuming projects is one of the current researches in the global machinery and equipment industry. The computational simulation allowed to reduce both the project time and costs with prototypes. In this context, the present study aims to evaluate the behavior of contact forces parameters in angular contact ball bearings with the variations of load and rotation applied to this contact, applying the resulting forces simulated in complex systems that contain this type of bearing. From the characterization of the bearing and the parameters for a specific set of rotations and loads, it is possible to study its behavior and estimate parameter values for different load conditions without having to perform a new characterization for each set of parameters that are tested. Initially, the balance of moments and forces in the bearing is calculated using the Hertz contact force model and the force distribution is determined. Sequentially, the system of elastohydrodynamic (EHD) equations is solved by applying the previously calculated parameters. Then, an optimization of the parameters of non-linear contact forces is made for each sphere (contact with the internal and external raceway) and the balance of forces and moments are recalculated using these estimated parameters. The process is repeated until the contact forces adjusted and calculated by the balance of forces and moments reach an established tolerance. The final calculated parameters of these iterations allow to evaluate the behavior of the bearing contact with the variations of rotation and load and to test the resultant forces on simulations of a complex rotor system, for example.
Keywords
contact model, ball bearing, nonlinear parameters, EHD lubrication
