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Development of an active hydrodynamic bearing for application in rotary systems

Grant number: 18/11298-4
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2019
Effective date (End): February 28, 2023
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal researcher:Gregory Bregion Daniel
Grantee:Douglas Jhon Ramos
Home Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:15/20363-6 - Fault tolerant identification and control of rotating systems, AP.TEM


This research project aims to develop a new concept of hydrodynamic bearing capable of improving the performance of rotary machines by preventing the condition of fluid-induced instability, reduction in bearing temperature and control of their load capacity. A model of the hydrodynamic bearing will be developed to allow the rotation movement of its surface, thus allowing to change the average speed of the lubricating oil film. The dynamic behavior of the rotor as well as the forces developed in the bearings will be evaluated initially through computational simulation, and the equations of motion that govern the system will be solved over time through a numerical integrator. From these simulations it is possible to verify how the inclusion of the model of this new bearing is able to prevent the condition of fluid-induced instability, control the load capacity and reduce the temperature of the oil film acting on the average speed of the lubricant film. The responses obtained in the simulations will be compared with the response obtained in the rotor with the conventional bearing model, in order to verify the improvements proposed in this project. In addition, the design of this new bearing model will be developed in order to obtain a viable constructive solution for the fabrication and assembly of these new bearing. With this, the prototype of this bearing will be submitted to experimental tests under different operating conditions, in order to validate the results obtained through the computational simulations. This project is inserted in the scope of thematic project 2015/20363-6 "Identification and control of failures in rotating systems", acting as a proposal to prevent lubrication failures, and also, changing the equilibrium position of the shaft inside the bearing and keep the machine running until a maintenance stop is programmed. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RAMOS, D. J.; DANIEL, G. B.. A new concept of active hydrodynamic bearing for application in rotating systems. TRIBOLOGY INTERNATIONAL, v. 153, . (15/20363-6, 18/11298-4)

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