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The influence of bearing grease composition on friction in .

P.M. CannGrease lubrication of rolling element bearings — role of the grease thickener. Lubr Sci, 19 (2007), pp. 183-196 ... P.M. CannGrease degradation in a bearing simulation device. Tribol Int, 39 (2006), pp. 1698-1706. Google Scholar ... J. LäugerCorrelation between friction and flow of lubricating greases in a new tribometer device ...

Analysis and Characterization of Waste Lubricating Grease .

2006 [14] reported a similar observation for grease degradation in a bearing simulation device. The WGDO spectrum shows an intense (C=O) band at 16701725 cm-1, - which is due to oxidation of the oil and small traces of the thickener. Rincon et al, 2007 [15] pointed out that the co-extraction of oxidation compounds together with base oil may

Lubricants | September 2016 - Browse Articl

Lubricants, Volume 4, Issue 3 (September 2016) . Issues are regarded as officially published after their release is announced to the table of contents alert mailing list.; You may sign up for e-mail alerts to receive table of contents of newly released issues.; PDF is the official format for papers published in both, html and pdf forms.

Tribological behaviors of three novel imidazoline-type .

Three novel imidazoline-type thiadiazole derivatives are prepared and used as antiwear and extreme-pressure additives in biodegradable lithium grease, and their tribological performances are evaluated using a four-ball tester. Tribological tests show that all derivatives are effective in reducing wear, especially at lower additive concentrations.

Modeling of the Non-Linear Rheological Behavior of a .

José M. Madiedo, José M. Franco, Concepción Valencia, ... and Kokini, J. L., 1995, “Simulation of the Non-Linear Rheological Properties of Gluten Dough Using the Wagner Constitutive Model,” J. Rheol., 39, pp. 1465–1482. 32 . Darby ... Modeling of the Non-Linear Rheological Behavior of a Lubricating Grease at Low-Shear Rates.

Assessing workability of greased bearings after long-term .

Abstract. Here, we developed a technique to assess the workability of sealed-for-life greased rolling bearings after a long-term storage. In this framework, we devised a model of equivalent transition between the conditions of natural ageing under daily and seasonally fluctuating temperature, and the conditions of accelerated thermal ageing at a constant high temperature.

3(5)250$1&( $1' 7(67,1* 2) +$5021,& '5,9( *($56 /8%5,&$7 .

With the aid of specific test device, twelve harmonic drive gears whose inner fexspline diameter is 60mm and . reduction ratio is 200:1, were divided into four groups to estimate their performance degradation and life under four kinds of output torque stress respectively in vacuum.

Grease degradation in a bearing simulation devi

Grease degradation in a bearing simulation device Grease degradation in a bearing simulation device Cann, P.M. 2006-12-01 00:00:00 In this study, a ball-on-disc traction (MTM) device has been used to degrade grease under controlled thermal and shear conditions over an extended period. The tests were run under both fully flooded and semi-starved conditions to simulate the lubricant supply ...

The influence of bearing grease composition on friction in .

Read "The influence of bearing grease composition on friction in rolling/sliding concentrated contacts, Tribology International" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Biocides in Hydraulic Fracturing Fluids: A Critical Review .

Biocides are critical components of hydraulic fracturing (“fracking”) fluids used for unconventional shale gas development. Bacteria may cause bioclogging and inhibit gas extraction, produce toxic hydrogen sulfide, and induce corrosion leading to downhole equipment failure. The use of biocides such as glutaraldehyde and quaternary ammonium compounds has spurred a public concern and debate ...

... for Internal Temperature of Rolling Bearings--《Bearing .

Based on the basic theories of heat transfer and tribology of rolling bearings, a temperature simulation model of rolling bearings system was developed with CFD code Fluent ...

(PDF) Studies of the Kinetics of Lithium Grease .

Stuttgart/Ostfild- observed for the methyl and methylene groups character- ern, Germany (2008) istic for lithium 12-hydroxystearate molecules. This con- 10. Paszkowski, M.: Some aspects of grease flow in lubrication systems and friction nodes.

film thickness and friction in grease lubricated contacts .

The rheological parameters of lubricating greases (G1 , G2 , G˚ , K, m, τy , τ , η, tan pδq) were measured / calculated to characterize thickener-oil interaction, grease flow and viscoelastic characteristics and determine their possible influence on grease traction behaviour, film thickness and rolling bearing friction torque.

NAVER Academic > Grease lubrication of rolling element .

Lubricant film thickness and friction were measured for different grease thickener types in a bearing simulation device. The ... Grease lubrication of rolling element Author ...

Bearing performance limits with grease lubrication: the .

Bearing performance limits with grease lubrication: the interaction of bearing design, operating conditions and grease properties. P M E Cann 1 and A A Lubrecht 2. Published 30 August 2007 • 2007 IOP Publishing Ltd Journal of Physics D: Applied Physics, Volume 40, Number 18

(PDF) Grease Degradation in R0F Bearing Tests | P. Lugt .

This paper is the second in a series that examines grease lubrication mechanisms and failure in rolling element bearings. The aim of the work was to understand the grease condition changes during use and the relationship to lubrication performance

NAVER Academic > Grease lubrication of rolling element .

Lubricant film thickness and friction were measured for different grease thickener types in a bearing simulation device. The ... Grease lubrication of rolling element Author ...

Grease Degradation in Rolling Element Bearings | P. M .

Grease is degraded during use in rolling element bearings and as a result the lubrication performance can deteriorate. Under severe conditions this can result in lubrication failure and, thus, the ...

US8718991B2 - Prediction of relubrication interval .

The invention relates to a method of predicting when a grease in a grease-lubricated rolling element bearing ( 10 ) will reach an unacceptable condition. According to the invention, a time series of a parameter is measured and recorded, whereby the parameter is directly or indirectly indicative of a degree of breakdown of a lubricant film separating the rolling contacts.

Grease lubrication of rolling element bearings — role of .

Lubricant film thickness and friction were measured for different grease thickener types in a bearing simulation device. The results showed that the greases formed thick (20–80nm), low friction surface layers at low speeds, which were much greater than the corresponding base oil film. ... P. M. Lugt, R . Bosman, C ... Thermal modeling of a ...