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fluid-film lubrication

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... Abstract This article discusses the classification of sliding bearings and describes the major groups of soft metal bearing materials: babbitts, copper-lead bearing alloys, bronze, and aluminum alloys. It provides a discussion on the methods for fluid-film lubrication in bearings. The article...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006401
EISBN: 978-1-62708-192-4
... Publications , Oxford, U.K. , 2005 7. Hamrock B.J. , Schmid S.R. , and Jacobson B.O. , Fundamentals of Fluid Film Lubrication , 2nd ed. , Marcel Dekker Inc. , New York , 2004 8. Tallian T.E. , On Competing Failure Modes in Rolling Contact , ASLE Trans ., Vol 10...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006422
EISBN: 978-1-62708-192-4
... the coefficient of friction is inversely proportional to η v/P . Figure 8 illustrates three lubrication regimes, namely boundary lubrication, mixed-film lubrication, and fluid-film lubrication. Fig. 8 Stribeck diagram used to characterize lubrication regimes. Source: Ref 15 With low η and/or v...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006369
EISBN: 978-1-62708-192-4
... is considered to be an extreme environment. Lubrication by liquids and greases performs two primary functions: separation of surfaces in relative motion through the generation of a fluid film, and conduction of heat away from the contact area. Secondary functions include the removal of wear debris...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006429
EISBN: 978-1-62708-192-4
... with electric motors and internal combustion engines of the same power (v) based on item (ii), the concept of hydrostatic lubrication is ease of application to the sliding parts. Piston type machines are superior to the other types. Fig. 1 Limits of operation of hydraulic pumps. (1) Fluid film formation...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006427
EISBN: 978-1-62708-192-4
... compared to the surface roughness. Figure 2 illustrates the levels of separation of two rough surfaces ( Ref 20 ). Hydrodynamic lubrication, or fluid film lubrication, refers to the regime where the surfaces are separated by a sufficiently thick oil film so there is no direct solid–solid contact...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
... a large role in the creation of hydrodynamic lubrication conditions. Specifically, low contact angles (i.e., die angles) tend to increase the height of the fluid film and promote full film lubrication. High temperatures lead to a decrease in lubricant viscosity and can cause chemical breakdown...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006354
EISBN: 978-1-62708-192-4
... discharge), scuffing, and Hertzian fatigue (including macropitting and micropitting). Details for obtaining high lubricant specific film thickness are presented. The article describes the selection criteria for lubricants, such as oil, grease, adhesive open gear lubricant, and solid lubricants. It discusses...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005179
EISBN: 978-1-62708-186-3
... (such as sulfur and chlorine) or zinc stearate soaps in order to prevent galling. Solid-film lubricants in the form of polyethylene, polyvinyl chloride, and polytetrafluoroethylene, which are applied to the workpiece as a powder, coating, or solid sheet, also give adequate protection against adhesive wear...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006424
EISBN: 978-1-62708-192-4
... , Journal of Materials Processing Technology , Vol 166 ( No. 3 ), 20 August 2005 , p 372 – 380 , http://doi.org/10.1016/j.jmatprotec.2004.07.103 68. Steenberg T. , Olsen J.S. , Christensen E. , and Bjerrum N.J. , Estimation of Temperature in the Lubricant Film during...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006362
EISBN: 978-1-62708-192-4
... and Its Application to Mr. Beauchamp Towser’s Experiments, Including an Experimental Determination of the Viscosity of Olive Oil , Philos. Trans. R. Soc. (London) A , Vol 177 (Part I) , 1886 , p 157 – 234 10.1098/rstl.1886.0005 3. Hamrock B. , Fundamentals of Fluid Film Lubrication...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006366
EISBN: 978-1-62708-192-4
... 40 ( No. 2 ), 2010 , p 247 – 268 10.1007/s11249-010-9671-8 26. Song Z. , Liang Y. , Fan M. , Zhou F. , and Liu W. , Ionic Liquids from Amino Acids: Fully Green Fluid Lubricants for Various Surface Contacts , Rsc Advances , Vol 4 ( No. 37 ), 2014 , p 19396...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006405
EISBN: 978-1-62708-192-4
... and hardware wear by introducing a stable, lubricating film between moving parts Cooling, because it helps dissipate heat away from the critical parts of the equipment Cleaning and suspending, because it facilitates the smooth operation of the equipment by removing and suspending deposits such as carbon...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006411
EISBN: 978-1-62708-192-4
... friction coefficient is achieved when the two surfaces are completely separated by a relatively thick oil film (λ >3). Fig. 7 Typical Stribeck curve, which depicts friction regimes for sliding lubricated surfaces categorized as solid/boundary friction, mixed friction, and fluid friction...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006434
EISBN: 978-1-62708-192-4
... the material categories of solid lubricant coatings, including graphite, graphite fluoride, transition metal dichalcogenides, diamond-like-carbon, polymeric materials, and metallic films. The article presents a description of deposition methods from the simplest processes involving burnishing and impingement...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006409
EISBN: 978-1-62708-192-4
.... From a macroscopic point of view, viscous heating originates from local deformation of the lubricant film due to shear stresses. The mechanical work necessary to shear off the fluid film is converted into internal friction between layers of fluid and finally dissipated into heat. Hence, viscous heating...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006407
EISBN: 978-1-62708-192-4
... and antiwear agents. Extreme-pressure/anti-wear (EP/AW) oils are usually rust and oxidation (R&O) inhibited products with EP/AW additives to generate a lubricating surface that can prevent metal-to-metal contact or smoothen the surfaces when the fluid film fails. Two main strategies exist in formulating EP...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006356
EISBN: 978-1-62708-192-4
... as well. Fuel efficiency is also a fundamental concern in transmission fluids. As with other lubricant areas, there are investigations into lower-viscosity transmission fluids as well as blends of various viscosities. The changes are pursuing reductions in friction, which stands to reason with the link...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004032
EISBN: 978-1-62708-185-6
... that the carrier fluid not only impaired the interlayer bonding but caused the squeeze film effect, if the contact time of the forging process was short enough. However, it was also concluded that the water in aqueous graphite evaporated very early, especially when the die was very hot. They pointed out...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006398
EISBN: 978-1-62708-192-4
... Evaluation of Journal Bearings , Tribol. Int. , Vol 30 ( No. 11 ), 1997 , p 825 – 834 10.1016/S0301-679X(97)00066-2 13. Elrod H.G. , Thin-Film Lubrication Theory for Newtonian Fluids with Surfaces Possessing Striated Roughness or Grooving , J. Lubr. Technol. , Vol 95 ( No. 4 ), 1973...