Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Assessment of Modal Balancing Technique Applied to a Rotating Machine Supported by Deep-Groove Ball Bearings
Submission Author:
Thiago de Paula Sales , SP
Co-Authors:
Yuri Andrade Dias Martins, Thiago de Paula Sales
Presenter: Yuri Andrade Dias Martins
doi://10.26678/ABCM.COBEM2023.COB2023-1101
Abstract
Rotating machines are widely employed in many engineering fields, being vastly explored from power generation to aeronautical mobility with high demands. To fulfill the operational requirements and guarantee certain reliability, it is crucial that a given machine runs with acceptable vibration levels within its specified operating range. However, this condition is not always met due to inherently present mechanical faults which cause malfunctions and may lead to excessive bearing wear, potentially compromising the whole rotating assembly lifetime. For this reason, this paper discusses theoretical and experimental unbalance identification in a laboratory test rig comprised of a flexible shaft and a rigid disk, supported by deep-groove ball bearings, modeled using the finite element method. In possession of a representative model of the rotor system, and experimental data measured from the test rig, an optimization problem is posed and solved to identify unknown unbalance parameters, including magnitude and phase. Verification of the rotating assembly new operating condition in terms of vibration levels is performed by comparing orbit plots, velocity amplitudes at the balancing speed and run-up tests. Results show a great reduction in terms of vibration amplitude comparing unbalanced and balanced cases, motivating the application in more complex rotors.
Keywords
balancing, Optimization, flexible rotor, Fault Detection
