Mixed Lubrication Solution of Dynamically Loaded Radial Slide Bearings

Novotný, Pavel

doi:10.24874/ti.2017.39.01.09

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The problems of interaction contacting surfaces are most actively considered in mechanics [5,7,8] and are caused by the processes of friction and wear. It is known that the interaction process is a complex process of physico-chemical and molecular mechanics, and it is not possible to describe it without reasonable simplifications, therefore, various models of the friction process have become widespread [7,[9][10][11][12]. It is widely recognized that existing methods are not perfect, and work in this direction continues.…”

Section: Introductionmentioning

confidence: 99%

The Construction of Models of Rough Surfaces’ Interaction: Markov’s Approach

2022

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This article shows that the change of rough surfaces in the way of their contact interaction can be analyzed using the theory of Markov’s processes. In the framework of existing models, this problem cannot be solved. In this article, the idea of reducing to Markov’s model is shown on a simple discrete scheme, which is then generalized. The approach was applied to the analysis of the friction process, to the fatigue failure mode, in which the surface element changes after multiple contacts, possibly many millions. The Kolmogorov-Feller’s equations for the model of this regime were presented and the model of the influence of lubrication is offered. A calculated example of estimating the evolution of surfaces separated by a lubricant layer is given. Additionally, the technical characteristics as functions of the friction path and the load were evaluated.

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Section: Introductionmentioning

confidence: 99%

The Construction of Models of Rough Surfaces’ Interaction: Markov’s Approach

2022

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“…Additionally, the tribological performance for journal bearings was tested by applying a bio-based lubricant method [13]. The effect of lubrication oil on the performance of journal bearings was studied by some authors [14,15]. The gaseous phase areas of journal bearings under flooded and starved lubrication conditions were theoretically studied by means of the computational fluid dynamics of a two-phase flow [16].…”

Section: Introductionmentioning

confidence: 99%

Static Characteristics of a Tilting Five-Pad Journal Bearing with an Asymmetric Geometry

2020

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In this paper, static characteristics of a tilting five-pad rocker-backed journal bearing with an asymmetric geometry, i.e., different clearance for each pad, are investigated. A thermo-elasto-hydrodynamic (TEHD) model considering the elasticity of the pad and pivot is used for the simulation. The pivot stiffness of each pad obtained by experiment is also introduced in the model. The experimental tests were carried out on a tilting pad journal bearing (TPJB) with a nominal diameter of 100 mm and a length-to-diameter (L/D) ratio of 0.7 with load-between-pad (LBP) and load-on-pad (LOP) arrangements. Several analyses, including numerical simulations and experimental measurements, are implemented in order to obtain the static behaviors of the tilting-pad bearing under variations of rotational speed, amplitude and direction of applied static load, such as clearance distribution profile, static eccentricity, temperature and pressure distribution. The results show that the effect of asymmetric geometry on the static characteristics is not negligible.

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