ANALYSIS OF HYDRODYNAMIC LUBRICATION OF JOURNAL BEARINGS WITH OIL OF NON-NEWTONIAN PROPERTIES
Journal Title: Tribologia - Year 2017, Vol 272, Issue 2
Abstract
In this paper, the presented issue concerns hydrodynamic lubrication of the journal bearings with the oil of non-Newtonian properties. For the analysis of the hydrodynamic lubrication, a constitutive model of the third order was assumed. The assumed model consist of a Newtonian part –pI+ηA1 and non-Newtonian part β3·tr(A1 2)A1. The main part of this paper concerns transformation, nondimensionalization, and an estimation of the order of magnitude of the equation, which describes the apparent viscosity. Apparent viscosity describes changes in the dynamic viscosity with shear rate. In this way, the prepared model of apparent viscosity is used in momentum equations. These equations are integrated in order to designate components of the velocity vector. By substitution of the proper boundary conditions, a modified Reynolds type equation is obtained. A further stage of the research will be proceeding of the numerical calculations of the hydrodynamic pressure distribution followed by the designation of the carrying capacity, friction force, and friction coefficient while taking changes of the viscosity from shear rate into account (apparent viscosity).
Authors and Affiliations
Andrzej MISZCZAK, Grzegorz SIKORA
Keywords
Related Articles
- EP ID EP239714
- DOI -
- Views 65
- Downloads 0
Kapryloamfoproponian sodu jako efektywny dodatek modyfikujący właściwości smarne wody
EVALUATION OF WEAR RESISTANCE OF POLYMER MATERIALS IN COOPERATION WITH AN OXIDE COATING
This paper presents the tribological and stereometric research of polymer materials: POM (Delrin), PTFE (Teflon), PA (Nylon) in cooperation with the oxide aluminium alloy. The purpose of the study was to determine the su...
INFLUENCE ESTIMATION OF SLIDING BEARING DETAILS OVALITY ON THE LONGEVITY ACCORDING TO GENERALIZED CUMULATIVE WEAR MODEL
The solution results of contact problem and wear for sliding bearing under the existence of bush and shaft ovality are given using the express-method of calculations. Single-area and mixed schemes of interaction in the b...
IMPROVING THE WORKING CONDITIONS OF FRICTION BY USING OPERATION ADDITIVES TO LUBRICATING OIL
This paper presents the results of laboratory testing and verification on the actual technical facilities for lubricating oil CE/SF SAE 15W/40 and modified operational preparations with chemicals based on solid lubricant...
Badania tribologiczne kompozytów POM z włóknem aramidowym i z proszkiem PTFE współpracujących ze stalą
W artykule przedstawiono wyniki tribologicznych badań porównawczych kompozytów na osnowie polioksymetylenu (POM), o nazwie handlowej Tarnoform, z ciętymi włóknami aramidowymi oraz z proszkiem PTFE. Wymienione napełniacze...