Effect of micro protrusions on the performance of elliptical journal bearings operating with couple stress lubricant

• Autorzy: Abass Basim Ajeel , Mahdi Mushrek A.

Identyfikatory

DOI

10.29354/diag/136321

• Języki publikacji: EN

Abstrakty

EN

Elliptical bearing is characterized by low induced temperature and high stability at higher speed in comparison with the cylindrical journal bearing. The performance of such bearings can be affected by the type of oil used and its surface properties. The main goal of this work is to study the surface micro protrusion effect on the steady state operation of elliptical journal bearing lubricated with couple stress lubricant. The modified Reynolds’ equation to take into account the effects of couple stress lubricant and micro protrusions of the bearing surfaces is solved using finite difference method. The governing equations were solved using a prepared FORTRAN computer program. Pressure distribution, load carrying capacity and coefficient of friction have been studied for a bearing in laminar flow regime. The mathematical model was validated by comparing pressure results for the elliptical bearing of the present work with that obtained by Hussain et al.(1996). The obtained results demonstrate that the lubricant pressure and the load carried by the bearing decrease for the bearing with higher ellipticity factor while the load carried by the bearing increases for the bearing with higher protrusions or when using a couple stress fluid with higher couple stress variable.

Słowa kluczowe

EN

elliptical journal bearing; hydrodynamic lubrication; micro-protrusions; couple-stress lubricant; non-Newtonian fluids

PL

smarowanie hydrodynamiczne; płyny nienewtonowskie

• Wydawca: Polskie Towarzystwo Diagnostyki Technicznej
• Czasopismo: Diagnostyka
• Rocznik: 2021
• Tom: Vol. 22, No. 2
• Strony: 97--104
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Abass Basim Ajeel

• University of Babylon, College of Engineering, Mechanical Engineering Department, Babylon, Iraq

autor

Mahdi Mushrek A.

• Al-Musayab, Automobile Engineering Department, Babylon, Almusyab-Iraq

Bibliografia

• 1. Xiao-Li Wang, Ke-Qin Zhu, Shi-Zhu Wen. Thermohydrodynamic analysis of journal bearings lubricated with couple stress fluids. Tribology International. 2001; 34: 335-343. https://doi.org/10.1016/S0301-679X(01)00022-6.
• 2. Yan-Yan Ma, Wei-Hua Wang, Xian-Hua Cheng. A study of dynamically loaded journal bearings lubricated with non-Newtonian couple stress fluids. Tribology Letters. 2004;17(1):69-74. https://doi.org/10.1023/B:TRIL.0000017420.44627.63.
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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).