Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Vibration Reduction of Flexible Shaft with Active Bearing
Submission Author:
Heitor Antônio Pereira da Silva , SP , Brazil
Co-Authors:
Heitor Antônio Pereira da Silva, Rodrigo Nicoletti
Presenter: Heitor Antônio Pereira da Silva
doi://10.26678/ABCM.COBEM2023.COB2023-1826
Abstract
Large rotating machines are essencial elements in the production chain, but they may occasionally operate under unpredicted or off-the-norm conditions, resulting in failures and significant economic losses. To minimize the consequences of non-standard operations, it is possible to change the characteristics of the bearings that support the rotor. However, with conventional bearings, this is only possible by completely stopping the machine, which also results in economic losses. The solution comes from the development of active bearings, which allow the modification of the dynamic characteristics of the machine during operation, without needing machine stops. The goal of this work is to utilize a PD (Proportional-Derivative) controller in a system consisting of a long and flexible shaft with a central disk mass. The shaft is supported by bearings on one end and an active bearing on the other. Two cases will be examined: the first is to control the vibration amplitude of the shaft at the end where the active tilting pad journal bearing is located, while the second is to control the vibration amplitude on the disk. This approach aims to reduce friction and wear on rotating machines, thereby extending their useful life, ensuring reliable operation, and minimizing economic losses. The development of active bearings is a significant industry innovation, with positive impacts on the efficiency and profitability of operations that depend on this equipment.
Keywords
Active TPJB, Electromagnetic Actuators, control, flexible shaft
