Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental analysis of friction torque loss in grease lubricated deep groove ball bearings
Submission Author:
Atilio Silva , PR
Co-Authors:
Atilio Silva, Diego Martins, Marcos Hiroshi Takahama, Cezar Otaviano Ribeiro Negrao, tiago cousseau
Presenter: Marcos Hiroshi Takahama
doi://10.26678/ABCM.COBEM2023.COB2023-1862
Abstract
Ninety percent of rolling bearing are grease lubricated. Besides that, rolling bearing friction torque and life predictions only take into account grease base oil properties. In this context, the objective of this research is to compare friction torque loss, and temperature rise using the SKF friction model, and compare it with experimental tests. To investigate the accuracy of the model, tests were conducted on the Rolling Bearing Power Loss Test Rig - RBPLR at the Universidade Tecnológica Federal do Paraná. The test rig allows for controlling the rotation and load imposed on the bearing, while measuring frictional loss and temperature. In total, nine eight-hour tests were carried out on 6310ZZ deep groove ball bearings lubricated with GJN grease, with speeds of 900 rpm, 1350 rpm, and 1800 rpm, and loads of 1400 N, 1900 N, and 2400 N. Preliminary experimental results show the SKF friction torque model underestimates the measured values in the analysed time interval, which might be related to the churning phase of the rolling bearing. The dependence of friction torque loss with load was shown to be nearly negligible compared to influence of speed, which agrees (or not) with the predictions.
Keywords
Bearings, lubricating greases, theoretical and experimental results, friction torquqe
