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squeeze-film lubrication

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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
... pressure is mostly due to the reluctance of the viscous liquid to be squeezed out from the system. Many bearings, including those that are used for reciprocating motion, depend on such squeeze-film lubrication. Designers rely on the squeeze-film action for plain bearings that are subjected to impact...
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
... describes the mixed-film lubrication and solid film lubrication in cold forging, as well as solid film lubrication and thick film lubrication in hot forging. The article reviews the factors affecting abrasive wear: die hardness, workpiece temperature, and lubrication and die temperature. It concludes with...
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: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006422
EISBN: 978-1-62708-192-4
... pickup ensues if the workpiece material shows adhesion to the roll. The rate of pickup is relatively low, because the contact zone is only a small fraction of the roll circumference and keeps moving around. Furthermore, in four-high and multiroll mills, work roll surface and lubricant film are further...
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
... strain ratio ( r ) value has the opposite effect. At the start of deformation there is normal approach between punch and sheet, and, in the presence of a liquid lubricant, a squeeze film develops. Contact is made at the highest point; in stretching over a hemispherical punch, there is no sliding at...
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
... Formed by Using Oil-Film Simulations” , SAE Paper #2012-01-0908, Society of Automotive Engineers , Warrendale, PA , 2012 38. Wang X. , Du J. , and Zhang J. , Mixed Lubrication Analysis of Piston Pin Bearing in Diesel Engine with High Power Density , ASME Paper # IJTC2011-61185...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006425
EISBN: 978-1-62708-192-4
... low. In zone 5, this is a severe sliding condition under circumferential compression, bending and unbending, causing high pressure. In zone 6, a lubricant is trapped by the squeeze-film effect due to the thickening of the flange, causing a wedge in hydrodynamic lubrication. Due to the different...
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
... journal center continuously changes and an additional lubrication mechanism, termed squeeze film lubrication, occurs. Fig. 7 Schematic diagram of dynamically loaded journal bearing. Source: Ref 9 Apart from radial sliding bearings shown in Fig. 6 and 7 , there are hydrodynamic bearings...
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
... lubrication in hot forging was studied ( Ref 7 ). Researchers found 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...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006399
EISBN: 978-1-62708-192-4
...-established and widely accepted analytical methods and design and analysis charts for dealing with some of the issues in the area of engine and power train tribology. It provides a discussion on lubricant rheology and the prediction of lubricating film thickness. The article reviews the frictional power loss...
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
... primary reason for this. Under dynamic loads, lubricant compression reduces squeeze-film energy dissipation that would otherwise occur and produces a small time delay between the application of the dynamic load and a new equilibrium pressure distribution within the bearing. This delay, under some...
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
... capacity lubricants rotating shaft sliding bearings squeeze-film lubrication surface roughness MECHANICAL DEVICES usually contain some moving parts. Bearings are usually provided where a specific spatial relationship (alignment) must be maintained between the parts or where a force is to be...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002474
EISBN: 978-1-62708-194-8
... surface. With fluids it is possible to generate thicker films as a result of squeeze film effects in the fluid. As a result of these effects it is sometimes possible to achieve complete separation of the surfaces, which virtually eliminates wear. This is referred to as fluid lubrication. (Design...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... material from the surface of a bearing race depends on the lubricant viscosity and/or film thickness. Various theories have been proposed that attribute the spalling to hydrostatic pressure of the lubricant being forced into surface cracks to propagate them. Another theory states that the propagation is...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006383
EISBN: 978-1-62708-192-4
... the traditional sense and may not generate measurable wear metal debris unless abnormal wear occurs. However, oil contaminants such as particulates, water, and/or fuel will weaken the lubricant film, resulting in metal-on-metal contact from which fatigue wear can propagate, or abrasive or adhesive...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003983
EISBN: 978-1-62708-185-6
... will adhere to the mandrel and to use the correct amount so that it does not drip into the dies during the swaging operation. Dry film lubricants work well in this application and have none of the drawback of other types of lubricant. Most mandrel lubricants have this adherent quality. The lubricant...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005104
EISBN: 978-1-62708-186-3
... eliminated wear while TiN only reduced it. Fig. 11 Effect of punch surface treatments on wear measured in a simulation test Various lubricants are effective in reducing wear, especially wear that is due primarily to adhesion. Liquid lubricants form a squeeze film when the punch hits the sheet...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003180
EISBN: 978-1-62708-199-3
... blends (a) C B C A C A C B B Soap-fat pastes (b) NR NR C A B B C B C Wax-base pastes (b) B B B A B B C B A Heavy-duty emulsions (c) B NR B A B B NR A B Dry film (wax, or soap plus borax) B B B NR B A B NR A Pigmented pastes (b) (d) B NR...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
..., and oxide materials. It is now widely used to fabricate automotive catalytic converter substrates. Shape capability has also expanded greatly, from simple rods and tubes to complex profiles, sheets/films, and honeycombs. Extrusion has limitations and cannot be used to make all products. It is best...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
.... , Friction in Aluminum Extrusion – Part 2: A Review of Friction Models for Aluminum Extrusion , Tribol. Int. , Vol 56 , 2012 , p 99 – 106 10.1016/j.triboint.2012.06.006 17. Hamrock B.J. , Schmid S.R. , and Jacobson B.O. , Fundamentals of Fluid Film Lubrication , 2nd ed. , CRC...