1. bookVolume 26 (2019): Issue 4 (December 2019)
Journal Details
License
Format
Journal
First Published
20 Dec 2019
Publication timeframe
4 times per year
Languages
English
access type Open Access

Distributions of Hydrodynamic Pressure in the Gap of Slide Journal Bearing Lubricated with Ferro-Oil

Published Online: 24 Apr 2020
Page range: 53 - 61
Received: 27 Sep 2019
Accepted: 06 Dec 2019
Journal Details
License
Format
Journal
First Published
20 Dec 2019
Publication timeframe
4 times per year
Languages
English

This research work is part of a broader comprehensive issue, which is the analysis of flow and operating parameters of journal slide bearings lubricated with ferro-oil. In this article, the author presents only the main assumptions and essential transformations of the analytical and numerical model for determining the pressure distributions in the gap of a slide journal bearing lubricated with ferro-oil. It is cardinal that the rheological and magnetic values of ferro-oil parameters adopted in numerical calculations are based on the results of actual values obtained in the author’s earlier research work. There are presented the pressure distributions by abovementioned method in the article for cases of bearings lubricated with ferro-oils with different concentration of magnetic particles. The obtained results are shown in the form of a set of four complementary characteristics of the dimensionless pressure distributions. First and main of them are the calculations for classical Newtonian lubrication but they take into account the influence of the magnetic field on the distributions. The next of the presented characteristics are so-called “corrections” of pressure distribution values, taking into account as follows: effects of changes in ferro-oil viscosity related to temperature changes, impacts of ferro-oil viscosity changes related to pressure changes and the effect of non-oil properties of the lubricant. The article includes a qualitative and quantitative analysis of the obtained results as well as observations and conclusions are presented in it.

Keywords

[1] Dudziewicz, J., Podstawy elektromagnetyzmu, WNT, Warszawa 1972.Search in Google Scholar

[2] Frycz, M., The ferro-oils viscosity dependent simultaneously on the temperature and magnetic oil particles concentration η=η(T,φ) – part I, Journal of KONES. Powertrain and Transport, Vol. 23, pp. 113-120, 2016.Search in Google Scholar

[3] Frycz, M., The research and modelling of dynamic viscosity of the ferro-oils with the different concentrations of magnetic particles in the aspect of pressure changes, Tribologia. Teoria i Praktyka, Vol. 2, pp. 39-48, 2017.Search in Google Scholar

[4] Frycz, M., Effect of Temperature and deformation rate on the dynamic viscosity of ferrofluid, Solid State Phenomena, Vol. 199, pp. 137-142, 2013.Search in Google Scholar

[5] Frycz, M., Horak, W., Effect of the concentration of the magnetic particles in the ferrooil on its dynamic’s viscosity changes in an external magnetic field, Solid State Phenomena, Vol. 220-221, pp. 324-327, 2015.Search in Google Scholar

[6] Frycz, M., Miszczak, A., Influence of magnetic particles concentration in ferro-oils on values of friction force and coefficient of friction of slide journal bearings, Journal of KONES Powertrain and Transport, Vol. 24, pp. 143-150, 2017.Search in Google Scholar

[7] Frycz, M., Miszczak, A., Longitudinal magnetic field in the journal sliding bearing gap, Tribologia. Teoria i Praktyka, Nr 6 (240), pp. 77-85, 2011.Search in Google Scholar

[8] Frycz, M., Wpływ stężenia cząstek magnetycznych w ferrooleju na parametry przepływowe i eksploatacyjne poprzecznych łożysk ślizgowych, Wydział Mechaniczny UMG, 2018.Search in Google Scholar

[9] Frycz, M., Impact of temperature on magnetic susceptibility coefficient χ of ferro-oils with different concentration of magnetic particles, Tribologia, Teoria i Praktyka, Vol. 5, pp. 21-30, 2016.Search in Google Scholar

[10] Frycz, M., Czaban, A., Models of viscosity characteristics η=η(B) of ferro-oil with different concentration of magnetic particles in the presence of external magnetic field, Journal of KONES. Powertrain and Transport, Vol. 21, No. 4, pp. 119-126, 2014.Search in Google Scholar

[11] Kalinin, A. I., Lavrinovich, L. I., Application of the small parameter method to the singularly perturbed linear-quadratic optimal control problem, Automation and Remote Control, Vol. 77, pp. 751-763, 2016.Search in Google Scholar

[12] Miszczak, A., Frycz, M., Wpływ stężenia cząstek magnetycznych w ferrooleju na wartość siły nośnej w poprzecznym łożysku ślizgowym przy uwzględnieniu zmian lepkości od pola magnetycznego, ciśnienia i temperatury, Logistyka – Nauka, Vol. 6, 2014.Search in Google Scholar

[13] Miszczak, A., Analiza hydrodynamicznego smarowania ferrocieczą poprzecznych łożysk ślizgowych, Monografia. Fundacja Rozwoju Akademii Morskiej, Gdynia 2006.Search in Google Scholar

[14] Pawlak, W., Practical methods of dynamic objects identification Part I. Small perturbations method, Prace Instytutu Lotnictwa, Vol. 170-171, pp. 57-64, 1998.Search in Google Scholar

[15] Walicka, A., Rheology of fluids in mechanical engineering, Oficyna Wydawnicza Uniwersytetu Zielonogórskiego, Zielona Góra 2017.Search in Google Scholar

[16] Wierzcholski, K., Mathematical methods of hydrodynamic theory of lubrication, Politechnika Szczecińska, Monografia, Nr 511, Szczecin 1993.Search in Google Scholar

[17] Wierzcholski, K., Miszczak, A., Równania hydrodynamicznej teorii smarowania cieczą o cechach modelu Rivlina Ericksena, Zagadnienia Eksploatacji Maszyn, Vol. 31, Z. 3 (106), pp. 7-18, 1996.Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo