Publication detail
The study of lubrication film formation under starved conditions
SVOBODA, P.
Czech title
Studium utváření mazacího filmu za podmínek nedostatečného mazání
English title
The study of lubrication film formation under starved conditions
Type
conference paper
Language
en
Original abstract
Rolling elements are among the most common machine elements in use today. They must function correctly, often over prolonged periods. To maintain optimum performance over an acceptable time, lubrication is often necessary to minimize friction and wear through the formation of a low shear strength film separating the surfaces. In engineering practices, for the contacts of elastohydrodynamic lubrication, it often occurs that the available lubricant is not enough to fill the gap between the two contact surfaces such an oil supply condition is called oil starvation. Starvation occurs whenever there is a limited amount of lubricant available to the contact and in this case the film thickness can be much less than under fully flooded conditions. In these cases starvation arises because there is a limited amount of lubricant available in the track. At present the classical theories cannot be applied to predict film thickness and this represents a severe limitation for designers.
Czech abstract
Valivé ložiska jsou v technické praxi nejvíce používanými strojními částmi. Tyto prvky musí fungovat správně a často přes prodlouženou trvanlivost. Pro zaručení optimálního výkonu je mazání nezbytné k minimalizaci tření, opotřebení a oddělení kontaktních ploch. V technické praxi pro elastohydrodynamicky mazané (EHL) kontakty nastává, že dostupné mazivo často nestačí, aby oddělilo třecí povrchy. Tento nedostatek maziva v EHL kontaktu se nazývá hladovění. Hladovění nastává v prvcích s omezeným množstvím maziva přiváděného do mazaného kontaktu. V tomto případě je tloušťka filmu mnohem menší než v plně zaplaveném EHL kontaktu. Doposud používaná klasická teorie nemůže být v tomto případě aplikovaná pro výpočet tloušťky filmu a toto představuje jisté omezení pro návrhy inženýrských uzlů.
English abstract
Rolling elements are among the most common machine elements in use today. They must function correctly, often over prolonged periods. To maintain optimum performance over an acceptable time, lubrication is often necessary to minimize friction and wear through the formation of a low shear strength film separating the surfaces. In engineering practices, for the contacts of elastohydrodynamic lubrication, it often occurs that the available lubricant is not enough to fill the gap between the two contact surfaces such an oil supply condition is called oil starvation. Starvation occurs whenever there is a limited amount of lubricant available to the contact and in this case the film thickness can be much less than under fully flooded conditions. In these cases starvation arises because there is a limited amount of lubricant available in the track. At present the classical theories cannot be applied to predict film thickness and this represents a severe limitation for designers.
Keywords in Czech
tloušťka mazacího filmu, proces hladovění, tření, opotřebení
Keywords in English
lubrication film thickness, starvation process, friction, wear
RIV year
2010
Released
08.09.2010
Publisher
C-PRESS - Košice
Location
Košice
ISBN
978-80-970294-1-8
Book
51. Medzinárodná vedecká konferencia katedier častí a mechanizmov strojov
Edition number
1
Pages from–to
269–272
Pages count
4
BIBTEX
@inproceedings{BUT34434,
author="Petr {Svoboda},
title="The study of lubrication film formation under starved conditions",
booktitle="51. Medzinárodná vedecká konferencia katedier častí a mechanizmov strojov",
year="2010",
month="September",
pages="269--272",
publisher="C-PRESS - Košice",
address="Košice",
isbn="978-80-970294-1-8"
}