Carrying capacity and friction forces in a transverse journal bearing, lubricated with non-Newtonian oil

• Autorzy: Miszczak A. , Sikora G.

Identyfikatory

DOI

10.5604/01.3001.0010.3076

• Języki publikacji: EN

Abstrakty

EN

In this article, the authors present the results of numerical calculations. Calculations concern dimensionless carrying capacity and friction forces in a transverse journal bearing, lubricated by the oil of non-Newtonian properties. For analytical-numerical considerations a model of apparent viscosity changes based on exploitation time, pressure, temperature, shear rate was assumed The non-Newtonian properties of lubricating oil were characterized by increasing viscosity with increasing shear rate and described as an additional part in the constitutive equationβ3·tr(A1 2)A1. Analytical-numerical calculations were performed for smooth, non-porous plain bearing with full angle of wrap. Non-isothermal, laminar and fixed flow of lubricant in the lubrication gap of the journal bearing was assumed. Numerical calculations of hydrodynamic pressure distribution were made for Reynolds boundary conditions. The finite difference method was used to determine the Reynolds equation and the successive approximation method by taking into account the influence of pressure, temperature and non-Newtonian properties on the change of apparent viscosity. The results of the calculations are presented in the form of graphs and tables illustrating the influence of relative eccentricity and pressure, temperature and non-Newtonian properties on changes in the dimensionless load and friction force. Analysis of the obtained results illustrates the high-pressure effect on the increase of the carrying capacity and friction force for high relative eccentricities. A similar situation is by considering the non-Newtonian properties.

Słowa kluczowe

EN

slide journal bearing; hydrodynamic pressure; load carrying capacity; friction force; non-Newtonian oil

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2017
• Tom: Vol. 24, No. 3
• Strony: 203--210
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Miszczak A.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

autor

Sikora G.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

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• [9] Hayat, T., Hina, S., Hendi, A. A., Asghar, S., Effect of wall properties on the peristaltic flow of a third grade fluid in a curved channel with heat and mass transfer, International Journal of Heat and Mass Transfer, Vol. 54, pp. 5126-5136, 2011.
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• [12] Sikora, G., Miszczak, A.: Równania hydrodynamicznego smarowania poprzecznych łożysk ślizgowych z uwzględnieniem starzenia się oleju, Logistyka, 4, s. 5649−5656, 2015.
• [13] Wierzcholski, K., Mathematical Methods of Hydrodynamic Theory of Lubrication. Politechnika Szczecińska, Monografia, Nr 511, Szczecin 1993.
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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).