Experimental investigation of EHD grease lubrication in finite line contacts
نویسندگان
چکیده
منابع مشابه
Elastohydrodynamic Grease Lubrication Theory and Numerical Solution in Line Contacts
In this paper, film thickness and pressure distribution of EHL in line contacts for four kinds of greases and one type of oil are calculated under a series of rolling velocities by wing an inverse solution method. The Herschel-Bulkley model is wed for the rheological characteristics of the grease. Based on the theoretical analysis and numerical calculation, the following influences on film thic...
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The behaviors of two lithium lubricating greases were investigated under EHL circular contact through measurements of traction coefficients on a self-made rig in which the contact was continuously fed with fresh grease. The average values of Erying shear stress and shear modulus of the two lithium greases were obtained from traction experimental data using this rig. Based on the Evans-Johnson m...
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. . l l l r Irr/~ricctrt~ .filttr rl~ickt~(,.s.s of grensr l~rbr ico~r~l , cyli~trdricol rol11,r 1lrr11.sl /)i~crrirrg.s rocts tnmsrt,z,[i, ztsing 11 c n p ( t c i l ( ~ ~ ~ c c ~ t y / ) ~ dl.$plrrcrttrrrrt prol)~,. For cott~,bnri.son, tllr . S N ~ ~ I I ~ to.sts 7110'1' (11.so per/i)rtt11~1 zoi/11 1/11> / ) t~(tr i t~g~s l~tbt-ic(tl(~i 7~1111 ~ I I ~ T I ( , I Y L / oi1.s. Till, , f i / t t~ ...
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O/)licrrl iirtciferoi~~ctiy is used to stz~lly the film thickness of pccrses, colrl of soap srcspeiuioiu and of their base oils in point or lii,e cwrloct. 111 mze cllse, sa?tiples were taken born a grease-lubriccrtc(l p111.i~~c-Occiring test c$/.er 5%and 25-million revolutions. The effcc/I'~~c ~i.scosity of (1 pease t~itder the very high shear rates of the order i f 1/2 X lo-" S-I e i z c o z ~...
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In this article an arbitrary Lagrangian–Eulerian (ALE) formulation for modelling cavitation in elastohydrodynamic lubrication (EHL) is derived and applied to line contact geometry. The method is developed in order to locate the position of cavitation onset along the length of the contacting region which gives the transition from liquid to vapour in the fluid. The ALE is implemented by introduci...
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ژورنال
عنوان ژورنال: Friction
سال: 2018
ISSN: 2223-7690,2223-7704
DOI: 10.1007/s40544-018-0208-8