Development of an active hydrodynamic bearing for application in rotary systems

• Grant number: 18/11298-4
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2019
• End date: February 28, 2023
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Gregory Bregion Daniel
• Grantee: Douglas Jhon Ramos
• Host 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

Abstract

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)

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.. Microgroove optimization to improve hydrodynamic bearing performance. TRIBOLOGY INTERNATIONAL, v. 174, p. 12-pg., 2022-10-01. (15/20363-6, 18/11298-4)

RAMOS, D. J.; DANIEL, G. B.. A new concept of active hydrodynamic bearing for application in rotating systems. TRIBOLOGY INTERNATIONAL, v. 153, JAN 2021. (18/11298-4, 15/20363-6)

RAMOS, DOUGLAS JHON; CUNHA, BARBARA ZAPAROLI; DANIEL, GREGORY BREGION. Evaluation of physics-informed neural networks (PINN) in the solution of the Reynolds equation. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 45, n. 11, p. 16-pg., 2023-11-01. (15/20363-6, 18/11298-4)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

RAMOS, Douglas Jhon. Development of an active hydrodynamic bearing for application in rotating systems. 2023. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica Campinas, SP.