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Discussion on Ball Screw Slide–Roll Ratio and Entrainment Velocity Calculation [PDF]
Machines, 2022 The slide–roll ratio and entrainment velocity are critical parameters in ball screw mechanism tribology investigations and are often determined by Chin-Chung Wei’s approach. Their findings indicated that substantial sliding always occurs between the ball
Shu-Jiang Chen, Weike Wang, Lei Lv
exaly +6 more sources
Effect of contact angle and helix angle on slide-roll ratio under the uniform motion state of BSM [PDF]
MATEC Web of Conferences, 2017 To study the effect of contact and helix angles on slide-roll ratio at the ball contact point under the uniform motion state of ball screw mechanism (BSM), a slide- roll ratio model was derived in the literature [9] were used in this paper.
Deshun Kong, Min Wang, Xiangsheng Gao
doaj +2 more sources
The Influence of Slide–Roll Ratio on the Extent of Micropitting Damage in Rolling–Sliding Contacts Pertinent to Gear Applications [PDF]
Tribology Letters, 2019 Micropitting is a type of surface damage that occurs in rolling–sliding contacts operating under thin oil film, mixed lubrication conditions, such as those formed between meshing gear teeth. Like the more widely studied pitting damage, micropitting is caused by the general mechanism of rolling contact fatigue but, in contrast to pitting, it manifests ...
Amir Kadiric, Kadiric Amir
exaly +3 more sources
Tribology OnlineThe efficiency of electric vehicles (EVs) can be further enhanced by increasing the rotational speed of their motors. However, higher motor speeds may reduce the fatigue life of gear teeth, particularly through the formation of micropitting.
Takuto Kunii +3 more
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Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle
Lubricants, 2021 Total knee arthroplasty is on the rise worldwide. Despite its success, revision surgeries are also increasing. According to the American Joint Replacement Registry 2020, 3.3% of revision surgeries are due to wear, and 24.2% are due to mechanical ...
Matúš Ranuša +4 more
doaj +1 more source
The role of surface roughness and slide-roll ratio on the decomposition of MoDTC in tribological contacts [PDF]
Journal of Physics D: Applied Physics, 2017 Abstract In this study, the role of surface roughness and slide-roll ratio in the decomposition and friction performance of molybdenum dialkyldithiocarbamate (MoDTC) has been investigated. Tribotests were carried out in a minitraction machine (MTM) using steel discs of varying roughness rubbing against smooth ...
Khaemba, DN +4 more
openaire +2 more sources
Lubricants, 2023 This paper develops a coupling model of cam-roller contact and roller-pin contact considering thermal effects based on the exhaust cam-roller unit of an internal combustion engine.
Shuyi Li +4 more
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Experimental observation of shear properties of grease film at different sliding rolling ratios [PDF]
SCIENTIA SINICA Technologica, 2019 In this work, the friction coefficient and film thickness of a grease film were simultaneously measured by a new ball-on-disc thin film measurement device at different sliding rolling ratios (SRR). The results showed that the grease films sharply decayed from the full-flooded state to the starvation state.
Qi CHEN +4 more
openaire +1 more source
Lubricants, 2023 This study compares the film thickness, lubricant temperature, and traction curves of two groups of commonly used constitutive models for lubricants in thermo-elastohydrodynamic lubrication (TEHL) modelling.
Peyman Havaej +2 more
doaj +1 more source
Mathematics, 2021 Gear wear is a common fault that occurs in a gear transmission system that degrades the operating efficiency and may cause other catastrophic failures such as tooth breakage and fatigue.
Xiuquan Sun +4 more
doaj +1 more source