Experimental measuring set‐up and procedure for the traction coefficient on roller‐on‐disc contact

Abstract

A pin‐on‐disc machine was modified to measure traction coefficient and the potential of contact difference under controlled conditions of slide‐to‐roll ratio, temperature, contact pressure and entrainment speed; oil, grease, grease's base oil and bleed‐oil were tested. This new arrangement proved to be efficient to characterise lubricants traction behaviour, film separation and tribofilm generation. Copyright © 2016 John Wiley & Sons, Ltd.

An experimental assessment of surface micro irregularities (porosity and texture) effects on tribological behaviour under lubricated conditions.

“…Roller-on-disk tests were performed using the same tribometer of pin-on-disk configuration with a custom-made device for SRR variations, see Figure 5.4. This device was proposed by [115] and allowed discrete variation of sliding-rolling conditions. SRR variations were obtained by changing angular speed direction on roller and horizontal disks, thus affecting local kinematics of roller-on-disk interface.…”

“…The SRR device is composed of two shifting parts joined by a screw, being the upper attached to the tribometer and the lower hold the roller, see Figure 5 see [115]. The SRR validation occurred through kinematic evaluation and speed measurements (optical tachometer).…”

“…The SRR validation occurred through kinematic evaluation and speed measurements (optical tachometer). The device effectiveness and reliability in term of SRR variations, along with additional information necessary to deeply understand the fundamentals surrounding the device operation, can be found in the same reference [115]. The disk samples and oil used for pin-on-disk tests were evaluated here.…”

Dynamic, fatigue and harmonic analysis of a beam to beam system with various cross-sections under impact load

“…Later, a mathematical model analysing the basic geometric parameters involved in beam-to-beam contact was also presented [ 17 ]. In addition to contact analysis, research has also been proposed by considering pin-on-disc contact as beam-on-surface for analysis of wear and its inter-related properties [ 18 , 19 , 20 ].…”

Eficiência de uma transmissão automotiva e do comportamento tribológico em regimes de lubrificação aplicados à engrenagens automotivas.

“…Essas características são padrão de engrenagens carbonitretadas utilizadas em aplicações automotivas.FIGUEIREDO, 2015), onde foram avaliadas condições de rolamento e deslizamento (SRR). Para estes ensaios foi também construído um dispositivo, que permite utilizar diferentes condições de rolamento e deslizamento em ensaios tribológicos de rolamento e deslizamento(GAMA et al, 2016). Nesta linha de estudo foi preparada uma amostra de óleo com menor viscosidade e aditivação para extrema pressão otimizada de forma a avaliar seus efeitos na eficiência das transmissões.…”