Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Mathematical model of heat dissipation in rolling bearings
Submission Author:
Marcos Hiroshi Takahama , PR
Co-Authors:
Marcos Hiroshi Takahama, Cezar Otaviano Ribeiro Negrao, tiago cousseau
Presenter: Marcos Hiroshi Takahama
doi://10.26678/ABCM.ENCIT2022.CIT22-0719
Abstract
This work aims to predict the temperature in the bearing from the thermal modeling of a Rolling bearing. The model is based on the law of conservation of energy in a transient regime, whose equations are based in the thermal resistance network. In this model, the bearing was discretized at 39 nodes and has major detail in the inner region of the bearing. A bearing friction model is used to predict the torque and power dissipated in the bearing in the form of thermal energy. The model results were compared with measured values in a Rolling Bearing Power Loss Test Rig of the Universidade Tecnológica Federal do Paraná. The experimental rig makes it possible to measure temperature, torque, shaft rotation and load on the deep groves rolling bearing as a function of time. Eighteen 6-hour tests were performed on 6310ZZ rolling bearings lubricated with polyurea Mobilith grease and MT33 SKF grease. The system was subjected to rotations between 350rpm and 1800rpm and radial loads up to 1000N. An additional analysis in experimental results about of increase temperature are performed. The Results show as the friction torque model predicts a torque well below the measured values. Using measured torque measurement results as the model boundary condition, a good comparison was observed between calculated and measured temperature values in both transient and steady state. In all tests performed, the maximum difference between the calculated and measured temperatures was below 2.6ºC in steady state.
Keywords
Temperature prediction, rolling bearings, Thermal Resistance model
