Identification of oil starvation in hydrodynamic journal bearing using rotor vibration and Extended Kalman Filter

Oliveira, Marcus Vinícius Medeiros; Fioravanti, André R.; Daniel, Gregory B.

doi:10.1016/j.triboint.2022.107469

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…In order to prevent worked with the low performance at high temperatures in the journal bearings, Mobil DTE 68 fluid is used and the system is protected with this fluid. In this sense, Oliveira and Daniel (2024) have examined the problems that may be caused by deficiencies in oil of journal bearing with numerical analysis. As a result of the analyzes, it was observed that the deterioration in the input parameters of the fluid entering the system can cause more than one malfunction in the machines that tend to rotate [1].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the journal bearings of Keban Hydroelectric Power Plant using different type nanofluids

Öztürk,

Çiftçi

2024

International Journal of Energy Studies

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Energy production in line with demand rapidly increases. Fossil-fuel systems in use today pose a great threat to the future of the world and in this sense, the interest to the renewable energy sources such as hydroelectric energy systems is increasing. In this study, the heating problem of the turbine bearings one of the parts of the hydroelectric energy systems was evaluated, various analyzes were performed with the Computational Fluid Dynamics (CFD) approach to eliminate this problem and the results obtained were shared. Initial analyses were performed and evaluated for Mobil DTE 68 oil, which was commonly used as a refrigerant in journal bearings. Then, Al2O3 nanoparticles at concentrations of 3%, 7% and 10% were then added to the refrigerant oil and necessary analyses were performed for these three conditions. Finally, similar analyses were performed in the 3%, 7% and 10% concentration for SiO2. When the obtained temperature changes were examined accordingly, it was obtained that the increase in the concentration of nanoparticles exhibited a characteristic that was inversely proportional to the surface temperature. With the addition of nanoparticles, surface temperatures have been observed to decrease from 80 °C’ to 68 °C’, but the effect on sharp corners is quite low. In this sense, it has been obtained that nanoparticles can significantly increase the thermal characteristics of Mobil DTE 68 oil, and it has been concluded that nanofluids may be an alternative solution for the overheating problem that occurs in turbine bearings.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of the journal bearings of Keban Hydroelectric Power Plant using different type nanofluids

Öztürk,

Çiftçi

2024

International Journal of Energy Studies

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“…Porras-Vazquez et al 18 characterized the effect of spin on the film thickness distribution in the contact area under the condition of oil starvation, and provided an analytical expression to predict the film thickness under this specific condition. Oliveira et al 19 proposed a method to identify the phenomenon of starvation in real time from the noise and vibration of the machine, and the starvation rules extended from the theoretical research to application. In the mean while, the researches on the mechanism of grease starvation are also in progress.…”

Section: Introductionmentioning

confidence: 99%

A thermal EHL investigation for finite line contact under starved condition on bush-pin hinge pairs in industrial chains

Zhang

Wang

Venner

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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During the operation of the industrial chains, serious starvation may happen so that the oil film is often too thin to effectively separate the bush-pin surfaces, resulting in surface damage of the pin since the bush surface is harder. In this paper, the effects of oil supply and equivalent radius of curvature on the variations of pressure, film thickness and temperature in the contact area are studied based on the thermal elastohydrodynamic lubrication (EHL) theory and a finite line contact lubrication model under oil starvation condition is employed. It is found that oil starvation and the increase of equivalent curvature radius will aggravate the stress concentration at the end of the contact area, and more oil supply is required in the contact area if the thermal rise is considered. An oil starvation mechanism of finite line contact EHL is proposed, in which in addition to the direct influence of oil supply, the interaction of film thickness, pressure and temperature in the contact area also play important roles. The reduction of minimum film thickness is proposed to measure the degree of oil starvation at the ends of the contact area. The oil starvation process of finite line contact is divided into four typical stages.

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Spatial geometric error fusion and decoupling of multi-axis CNC machine tools based on Unscented Transform Kalman filter

Li,

Cai,

Meng

et al. 2025

Measurement

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Identification of oil starvation in hydrodynamic journal bearing using rotor vibration and Extended Kalman Filter

Cited by 9 publications

References 23 publications

Numerical analysis of the journal bearings of Keban Hydroelectric Power Plant using different type nanofluids

Numerical analysis of the journal bearings of Keban Hydroelectric Power Plant using different type nanofluids

A thermal EHL investigation for finite line contact under starved condition on bush-pin hinge pairs in industrial chains

Spatial geometric error fusion and decoupling of multi-axis CNC machine tools based on Unscented Transform Kalman filter

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