Experimental observation of elastohydrodynamically lubricated contacts replenishment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU115721" target="_blank" >RIV/00216305:26210/15:PU115721 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.mmscience.eu/content/file/MM_Science_201525.pdf" target="_blank" >http://www.mmscience.eu/content/file/MM_Science_201525.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17973/MMSJ.2015_10_201525" target="_blank" >10.17973/MMSJ.2015_10_201525</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental observation of elastohydrodynamically lubricated contacts replenishment

Popis výsledku v původním jazyce

Starved regime of elastohydrodynamic lubrication (EHL) is usually described by smaller thicknesses of the lubrication film then fully flooded regime. This state can be caused by a number of reasons including operating conditions, lubricant supply or/and its properties. Rolling bearings contain multiple consequent elements which can increase the risk of starvation because the replenishment mechanisms are not able to recover lubricant film after each element passage. One of the main aspects in the rolling bearings is proximity of the rolling elements. Severity of the starvation increases as the mutual elements distance decreases. Lubricant which was squeezed out by rolling element need some time to replenish the gap. This paper presents experimental methods for measuring the time necessary for oil lubricant film recovery. Results obtained by these methods had been compared with existing theory. The theory describes behavior of replenishment of the central film thickness and change in the lubricant distribution across the rolling track. Both of these aspects qualitatively agree. Changes in the central film thickness during replenishment process were theoretically described as very nonlinear process which was confirmed by experiment in this paper.

Název v anglickém jazyce

Experimental observation of elastohydrodynamically lubricated contacts replenishment

Popis výsledku anglicky

Starved regime of elastohydrodynamic lubrication (EHL) is usually described by smaller thicknesses of the lubrication film then fully flooded regime. This state can be caused by a number of reasons including operating conditions, lubricant supply or/and its properties. Rolling bearings contain multiple consequent elements which can increase the risk of starvation because the replenishment mechanisms are not able to recover lubricant film after each element passage. One of the main aspects in the rolling bearings is proximity of the rolling elements. Severity of the starvation increases as the mutual elements distance decreases. Lubricant which was squeezed out by rolling element need some time to replenish the gap. This paper presents experimental methods for measuring the time necessary for oil lubricant film recovery. Results obtained by these methods had been compared with existing theory. The theory describes behavior of replenishment of the central film thickness and change in the lubricant distribution across the rolling track. Both of these aspects qualitatively agree. Changes in the central film thickness during replenishment process were theoretically described as very nonlinear process which was confirmed by experiment in this paper.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MM Science Journal

ISSN

1803-1269

e-ISSN

1805-0476

Svazek periodika

neuveden

Číslo periodika v rámci svazku

2015/3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

640-644

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-84941220208