Study of the lubrication conditions and power losses in lubricated joint of mechanisms

• Grant number: 15/20036-5
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2016
• End date: September 30, 2018
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Gregory Bregion Daniel
• Grantee: Gregory Bregion Daniel
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

The necessity to obtain greater production, lower fuel consumption and lower emissions of pollutants is typical interest factors in the development of machinery and equipment. For this reason, the pursuit for more efficient machinery has been increased in recent years, aiming to obtain greater productivity and comply with the regulatory standards of consumption and emission. Therefore, the studies related to the identification of the main causes of power loss and, consequently, the development of tools that can reduce these losses has become of great value to the industrial sector. This research project is included in this context, whose topic is related to the study and analysis of lubricated joints that represent a kinematic pair susceptible to high power losses. This research project aims to analyze the conditions of lubrication and evaluate power losses in lubricated joints, allowing to verify its influence on the dynamic behavior of mechanisms. For this, lubrication models should be developed to represent the lubrication conditions in lubricated joints. In this research project will be developed three different lubrication models, namely: hydrodynamic lubrication model with effects of roughness, hydrodynamic lubrication model with texturized surfaces and lubrication model considering mechanical deformation. The hydrodynamic forces in the lubricated joints can be determined from these lubrication models, allowing to analyze the dynamic behavior of the mechanism. The modeling of the dynamic behavior of the mechanism is obtained by Lagrange method, being that the hydrodynamic forces in the lubricated joint represent coupling forces of the equations of motion of the mechanism. Finally, it is important to highlight that the computer simulations planned in this project aim to show the influence of the roughness, texturing and mechanical deformation of the bearing in the power loss, in order to propose solutions that can improve the mechanical efficiency and the dynamic behavior of mechanisms with lubricated joints. (AU)

Scientific publications

(8)

(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)

GARCIA DA SILVEIRA, ANDRE RODRIGUES; DANIEL, GREGORY BREGION. Piezoelectric harvester for smart tilting pad journal bearings. ENERGY CONVERSION AND MANAGEMENT, v. 205, FEB 1 2020. (15/20036-5)

RAMOS, DOUGLAS JHON; RAMOS, LEANDRO ITO; DANIEL, GREGORY BREGION. Stability Analysis of Rotating Systems Supported by Textured Journal Bearings. JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, v. 142, n. 3, MAR 2020. (15/20363-6, 15/20036-5, 16/20975-4)

CUNHA, BARBARA Z.; DANIEL, GREGORY B.. ffects of bearing lubrication conditions on rotor dynamic behavio. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, v. 236, n. 3, APR 2021. (15/20036-5)

GARCIA DA SILVEIRA, ANDRE RODRIGUES; DANIEL, GREGORY BREGION. Optimization analysis of an energy harvester for smart tilting pad journal bearings considering higher vibration modes. MECHANICAL SYSTEMS AND SIGNAL PROCESSING, v. 166, MAR 1 2022. (15/20036-5)

RAMOS, LEANDRO ITO; RAMOS, DOUGLAS JHON; DANIEL, GREGORY BREGION. Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, v. 234, n. 6, p. 16-pg., 2019-11-05. (15/20363-6, 16/20975-4, 15/20036-5)

RAMOS, LEANDRO ITO; RAMOS, DOUGLAS JHON; DANIEL, GREGORY BREGION. Evaluation of textured journal bearings under dynamic operating conditions in rotating machinery. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, NOV 2019. (15/20363-6, 15/20036-5, 16/20975-4)

SILVEIRA, A. R. G.; DANIEL, GREGORY BREGION. Influence of bearing ovalization in the dynamic of a planar slider-crank mechanism. Applied Mathematical Modelling, v. 66, p. 175-194, FEB 2019. (15/20036-5)

ITO, L. R.; RAMOS, D. J.; SILVEIRA, Z. DE C.; DANIEL, G. B.; CAVALCA, KL; WEBER, HI. Parametric Sensitivity Analysis of Tilting Pad Bearings to Investigate the Dynamic Behavior of Rotating Machines. PROCEEDINGS OF THE 10TH INTERNATIONAL CONFERENCE ON ROTOR DYNAMICS - IFTOMM, VOL. 1, v. 60, p. 15-pg., 2019-01-01. (15/20363-6, 16/20975-4, 15/20036-5)