Results 181 to 190 of about 4,040 (217)

Residue-free peeling of EGaIn oxide enabled by contact angle control. [PDF]

Nat Commun
Jung S, Son JG, Dickey MD, Kim W.
europepmc   +1 more source

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The kinematics of ball-screw mechanisms via the slide–roll ratio

Mechanism and Machine Theory, 2014
Abstract The motion state of balls in the ball screw mechanism is hard to observed or measured because of the complexity of the mechanism consisting of three main components: screw, nut and balls. In this paper, a kinematic model for the basic single arc ball screw mechanism driven by the rotation of the screw is established using the homogenous ...
Tao Zan
exaly   +2 more sources

Effect of the slide-roll ratio on point contact EHL under oil droplet supply

Tribology International, 2019
Abstract Under oil droplet supply a simplified elastohydrodynamic lubrication (EHL) model incorporating slide-roll ratios has been established, and the lubrication behavior of one oil droplet passing through the contact zone was numerically simulated.
Feng Guo, Xinming Li, Chenglong Liu
exaly   +2 more sources

Effects of Slide/Roll Ratio on the Behaviours of Grease Reservoir and Film Thickness of Point Contact

Tribology Letters, 2014
The film formation mechanism of lithium complex grease under starved condition was proposed based on the analysis of the relationship between grease reservoir and the finger-shaped lubricant along the rolling track using a laboratory built ball-on-disc test rig.
Lu Huang
exaly   +2 more sources

Experimental Investigation of Lubrication Failure of Polyalphaolefin Oil Film at High Slide/Roll Ratios

Tribology Letters, 2011
Lubrication failure of polyalphaolefin (PAO) oil film at high slide/roll ratios of more than 1.9 has been experimentally investigated based on a ball-on-disc configuration. The central film thickness and the oil pool shape in the contact were determined by optical interferometry and fluorescence microscopy, respectively, and the traction coefficient ...
Xinchun Lu, Shuhai Liu, Dan Guo
exaly   +2 more sources

The influence of base oil polarity and slide–roll ratio on additive-derived reaction layer formation

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2011
Functional additives, particularly extreme-pressure and antiwear additives, in formulated oil will compete to adsorb and form a protective layer in tribological contacts. The thickness of the layer is determined by the equilibrium between the formation and removal processes. In this article, the interactions between additives and base oil molecules and
Roland Larsson
exaly   +3 more sources

Solving coupled boundary slip and heat transfer EHL problem under large slide–roll ratio conditions

Tribology International, 2019
Abstract Furnishing boundary slip at one of the liquid/solid interfaces in a bearing contact has been proven able to reduce bearing friction in a few recent studies conducted under mild running conditions where thermal effect is insignificant. However, if the concept is applied to practical conditions, how the slip affects temperature rise and its ...
P L Wong
exaly   +2 more sources

Effects of Thermal Properties of Contact Materials and Slide-Roll Ratio in Elastohydrodynamic Lubrication

Journal of Tribology, 2021
Abstract The effects of thermal conductivity, heat capacity, thermal inertia, and slide-roll ratio (SRR) on point elastohydrodynamic lubrication (EHL) are discussed with engineering ceramics and steel by a non-Newtonian thermal EHL analysis.
Motohiro Kaneta, Kenji Matsuda, Hiroshi Nishikawa   +2 more
openaire   +1 more source

A Study on Hourglass Worm Gearing with Constant Slide-Roll Ratio

Journal of Mechanical Design, 1979
A new type of hourglass worm gearing is developed by the authors’ own theories [1], [2]. This hourlgass worm gearing has the good points of Hindley’s one and also covers the weak points of it. The worm is cut by a tool with straight-lined cutting edge which is fixed to the basic member [1].
T. Sakai, M. Maki, H. Tamura
openaire   +1 more source