Friction behavior and wear protection ability of selected base lubricants

Zhang, Xin Ai; Zhao, Yuzhen; Ma, Kai; Wang, Qian

doi:10.1007/s40544-016-0106-x

Cited by 20 publications

(8 citation statements)

References 25 publications

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“…In the process of comparing the lubricating properties of PAO base oils and mineral base oils, Wang et al [15] found that PAO with the same viscosity and mineral oils had better film formation at high temperatures, and the viscosity index of PAO was higher than that of mineral oils at 150 • C. And they studied three kinds of base oils with different molecular structures, and found that base oils with a linear molecular structure have higher viscosity and less wear at high temperatures. Zhang et al [16] compared PAO with the other three base oils through viscosity, friction, and wear tests. Fei et al [17] used gas chromatography/mass spectrometry (GC/MS), Fourier−transform infrared spectroscopy (FTIR), and other detection methods to study the physical and chemical properties, as well as chemical structure changes of PAO, after high−temperature oxidation.…”

Section: Introductionmentioning

confidence: 99%

Deterioration Mechanism and Status Prediction of Hydrocarbon Lubricants under High Temperatures and Humid Environments

Su,

Cao,

Jin

et al. 2024

Lubricants

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In practical engineering applications, high temperatures and water ingress seriously affect the service life of hydrocarbon lubricants. In this study, the deterioration process of hydrocarbon lubricants under high temperatures and humid environments was investigated, and a new health state prediction model was proposed. Simulation of hydrocarbon lubricant Polyalpha−olefin (PAO) molecules used the ReaxFF force field to analyse the high temperature thermal oxidation process of lubricants. The rheological properties of oil−water emulsions were determined by observing the morphology of oil−water two−phase mixtures with different water contents. A multiparameter fusion viscosity prediction model was proposed using a linear model of the viscosity of aqueous fluids, as affected by temperature and water content, and was fitted with the Andrade viscosity−temperature equation to predict lubricant viscosity changes under multiple parameters. Online validation tests were carried out on a compound planetary transmission system, and the surface topographical parameters of the transmission components were further discussed. Experimental results show that the linear correlation with the improved lubricant viscosity prediction model is 0.966, and the surface wear of transmission components is consistent with the trend of lubricant quality change. These findings provide a fundamental basis for the assessment of lubricant service life in high temperatures and humid environments.

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Section: Introductionmentioning

confidence: 99%

Deterioration Mechanism and Status Prediction of Hydrocarbon Lubricants under High Temperatures and Humid Environments

Su,

Cao,

Jin

et al. 2024

Lubricants

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show abstract

“…Boncheol Ku et al [7] constructed the experimental equipment with PETE (polytetrafluoroethylene) compounds and aluminum alloys on the surface of the journal bearing to investigate lubrication characteristics on two materials. Xin Ai Zhang et al [8] measured the friction coefficients for various oils with a pin-in-disk tribometer and summarized them in the form of Stribeck curves. Jianqiao Hu et al [9] studied surface friction at the nanoscale level and performed frictional tests.…”

Section: Introductionmentioning

confidence: 99%

Numerical Determination of the Frictional Coefficients of a Fluid Film Journal Bearing Considering the Elastohydrodynamic Lubrication and the Asperity Contact Force

et al. 2022

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This paper proposes a numerical method to investigate the frictional characteristics of a fluid film journal bearing considering the elastohydrodynamic lubrication and the asperity contact force. We solved the average Reynolds equation by utilizing the FEM to determine the hydrodynamic force developed by the lubricant of the journal bearing. We also used a modified GT model (Greenwood–Tripp model) developed by Greenwood and Tripp to decompose the asperity contact force into normal and tangential directions. Once we applied those forces to a rotor, we solved the equations of motion of a flexible shaft to determine the friction coefficient. We verified the proposed method by comparing the calculated friction coefficient with the measured one of journal bearings conducted by prior researchers. Then, the proposed method was applied to investigate the frictional characteristics of a journal bearing of a scroll compressor on which dynamic loads are applied. This paper can contribute to developing robust rotor systems supported by journal bearings.

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“…For this setup, a few standard test methods provided by international standard organizations, such as the American Society for Testing and Materials (ASTM) or the International Organization for Standardization (ISO), can be used, e.g., ASTM-99 [4] or ISO 7148-1 [5] and ISO 7148-2 [6]. It is a well-established method for characterizing lubricant properties [7][8][9], material pairings in dry contact [10,11], or specific geometries [12,13]. Typically, the disc is operated at a constant rotational speed.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive review of tribometer dynamics-Cycle-based data analysis and visualization

et al. 2021

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Tribologists often rely on triboexperiments to investigate factors that affect a tribosystem. The inherent dynamic behavior of the respective tribometer setups and its effect on data interpretation remain often unknown. In this study, a comprehensive analysis of sensor data obtained from lubricated and dry triboexperiments is performed. Data are generated on a pin-on-disc test rig with a silicon nitride ball on a steel disc contact with a rotation frequency of ~3 Hz. High-speed acquisition of sensor data up to 5 kHz is performed to resolve changes in the data within individual cycles. The characteristic frequencies of the system and their temporal evolution are determined via time-frequency analysis, which reveals periodic patterns in the sensor data. Cycle-based data evaluation allows the detection of localized events and changes during an operation and considerably reduces the apparent measurement uncertainty, as compared with an unreduced dataset. The data analysis and visualization routines presented herein may serve as a prototype for further application to tribometer setups.

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Friction behavior and wear protection ability of selected base lubricants

Cited by 20 publications

References 25 publications

Deterioration Mechanism and Status Prediction of Hydrocarbon Lubricants under High Temperatures and Humid Environments

Deterioration Mechanism and Status Prediction of Hydrocarbon Lubricants under High Temperatures and Humid Environments

Numerical Determination of the Frictional Coefficients of a Fluid Film Journal Bearing Considering the Elastohydrodynamic Lubrication and the Asperity Contact Force

Comprehensive review of tribometer dynamics-Cycle-based data analysis and visualization

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