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Modified Reynolds Equations for Thin Film Lubrication with Saturated High-Viscosity Surface Layer and Lubrication Analysis of Tapered Pad Bearing 饱和高黏度表面层薄膜润滑的修正雷诺方程及锥形垫轴承润滑分析
IF 1
Tribology Online Pub Date : 2022-09-30 DOI: 10.2474/trol.17.207
K. Ono
{"title":"Modified Reynolds Equations for Thin Film Lubrication with Saturated High-Viscosity Surface Layer and Lubrication Analysis of Tapered Pad Bearing","authors":"K. Ono","doi":"10.2474/trol.17.207","DOIUrl":"https://doi.org/10.2474/trol.17.207","url":null,"abstract":"This paper presents a modified Reynolds equation for analyzing thin film lubrication with a saturated high-viscosity surface layer on a solid surface. The saturated high-viscosity characteristics of engine oil blended with additives of metallic detergents and friction modifiers were expressed using new viscosity functions with various orders termed “viscosity model 2,” which is different from the previous model, termed “viscosity model 1.” The viscosity function was then incorporated on the moving surface, and the fluid flow in the bearing gap was determined in a closed-form solution for order numbers N of 2 to 5. Subsequently the modified Reynolds equation was formulated by numerically integrating the flow equation. The modified Reynolds equation was applied to analyze the tapered pad bearing, and different features of the load capacity and friction coefficients from those for viscosity model 1 were clarified. The effects of the order number N , viscosity ratio, bearing length, and high-viscosity layer thickness on the load capacity and friction coefficient were elucidated. It was found that when the order number N was increased to 5, the friction coefficient decreased to a minimal value, subsequently increased to the maximum value, and then decreased to the lowest value with a decrease in the trailing gap.","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"19 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81069887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
N-Oleoyl Sarcosine as an Engine Oil Friction Modifier, Part 2: Elucidation of Friction-Reducing Mechanism at Room Temperature Focusing on Contribution of NOS in NOS+ZDDP Mixture n-油酰肌氨酸作为发动机润滑油的摩擦改进剂,第二部分:室温下减摩机理的阐释——以NOS在NOS+ZDDP混合物中的作用为重点
IF 1
Tribology Online Pub Date : 2022-09-30 DOI: 10.2474/trol.17.227
W. Shen, Dongjiang Han, T. Hirayama, Naoki Yamashita, T. Oshio, Hideo Tsuneoka, K. Tagawa, K. Yagishita
{"title":"N-Oleoyl Sarcosine as an Engine Oil Friction Modifier, Part 2: Elucidation of Friction-Reducing Mechanism at Room Temperature Focusing on Contribution of NOS in NOS+ZDDP Mixture","authors":"W. Shen, Dongjiang Han, T. Hirayama, Naoki Yamashita, T. Oshio, Hideo Tsuneoka, K. Tagawa, K. Yagishita","doi":"10.2474/trol.17.227","DOIUrl":"https://doi.org/10.2474/trol.17.227","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"4 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86094117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
N-Oleoyl Sarcosine as an Engine Oil Friction Modifier, Part 1: Tribological Performance of NOS+ZDDP Mixture at 100°C n -油酰肌氨酸作为发动机润滑油摩擦改进剂,第一部分:NOS+ZDDP混合物在100℃下的摩擦学性能
IF 1
Tribology Online Pub Date : 2022-09-30 DOI: 10.2474/trol.17.216
W. Shen, Dongjiang Han, T. Hirayama, Naoki Yamashita, T. Oshio, Hideo Tsuneoka, K. Tagawa, K. Yagishita
{"title":"N-Oleoyl Sarcosine as an Engine Oil Friction Modifier, Part 1: Tribological Performance of NOS+ZDDP Mixture at 100°C","authors":"W. Shen, Dongjiang Han, T. Hirayama, Naoki Yamashita, T. Oshio, Hideo Tsuneoka, K. Tagawa, K. Yagishita","doi":"10.2474/trol.17.216","DOIUrl":"https://doi.org/10.2474/trol.17.216","url":null,"abstract":"The friction coefficient when a Fe surface was lubricated with an additive mixture of N-Oleoyl sarcosine (NOS), a commercial organic friction modifier, and zinc dialkyldithiophosphate (ZDDP) was measured at 100°C using a ball-on-disk tribometer under boundary lubrication conditions. The sliding surface was observed with a 3D laser microscope to investigate the tribo-film morphology and to evaluate the anti-wear performance. The findings indicate that this additive mixture enhanced tribological lubrication behavior in terms of friction-reducing and anti-wear properties under extended sliding cycle conditions. Scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDX) studies were conducted to analyze the elemental composition of sliding surfaces after tribo-tests and to estimate the friction reduction mechanism of the additive mixture. The EDX results revealed a noticeable decrease in S, suggesting that the NOS suppresses ZDDP decomposition and reduces the adsorption of the decomposition products.","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"20 5","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72602152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Design Method of Cylindrical Bearings Based on a Simplified Thermohydrodynamic Lubrication Model 基于简化热流体润滑模型的圆柱轴承设计新方法
IF 1
Tribology Online Pub Date : 2022-09-15 DOI: 10.2474/trol.17.175
K. Hatakenaka, Aoi Honda
{"title":"A New Design Method of Cylindrical Bearings Based on a Simplified Thermohydrodynamic Lubrication Model","authors":"K. Hatakenaka, Aoi Honda","doi":"10.2474/trol.17.175","DOIUrl":"https://doi.org/10.2474/trol.17.175","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"19 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84896361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computational Methods for Detection of Microgeometry Changes in Tribological Surfaces 摩擦学表面微几何变化检测的计算方法
IF 1
Tribology Online Pub Date : 2022-09-15 DOI: 10.2474/trol.17.196
G. Morales-Espejel, V. Brizmer, R. Meeuwenoord
{"title":"Computational Methods for Detection of Microgeometry Changes in Tribological Surfaces","authors":"G. Morales-Espejel, V. Brizmer, R. Meeuwenoord","doi":"10.2474/trol.17.196","DOIUrl":"https://doi.org/10.2474/trol.17.196","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"16 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78562523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transient Wear FEA Modelling Using Extrapolation Technique for Steel-on-Steel Dry Sliding Contact 基于外推法的钢对钢干滑动接触瞬态磨损有限元模拟
IF 1
Tribology Online Pub Date : 2022-08-31 DOI: 10.2474/trol.17.162
Vedant A. Joshi, P. Ramkumar
{"title":"Transient Wear FEA Modelling Using Extrapolation Technique for Steel-on-Steel Dry Sliding Contact","authors":"Vedant A. Joshi, P. Ramkumar","doi":"10.2474/trol.17.162","DOIUrl":"https://doi.org/10.2474/trol.17.162","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81694828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Announcement - 2021 JAST Best Paper Award 公告- 2021年JAST最佳论文奖
IF 1
Tribology Online Pub Date : 2022-08-31 DOI: 10.2474/trol.17.i
{"title":"Announcement - 2021 JAST Best Paper Award","authors":"","doi":"10.2474/trol.17.i","DOIUrl":"https://doi.org/10.2474/trol.17.i","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75025329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FTIR Condition Monitoring of In-Service Lubricants: Analytical Role and Quantitative Evolution 在役润滑油的FTIR状态监测:分析作用和定量演变
IF 1
Tribology Online Pub Date : 2022-08-31 DOI: 10.2474/trol.17.144
F. R. van de Voort
{"title":"FTIR Condition Monitoring of In-Service Lubricants: Analytical Role and Quantitative Evolution","authors":"F. R. van de Voort","doi":"10.2474/trol.17.144","DOIUrl":"https://doi.org/10.2474/trol.17.144","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"36 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76356829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of Lubrication Oil Parameter Degradation to Extend the Oil Change Interval Based on Gaussian Process Regression (GPR) 基于高斯过程回归(GPR)的润滑油参数退化预测延长换油周期
IF 1
Tribology Online Pub Date : 2022-07-31 DOI: 10.2474/trol.17.135
Najat Mohammad Nazari, M. Muhammad, A. Mokhtar
{"title":"Prediction of Lubrication Oil Parameter Degradation to Extend the Oil Change Interval Based on Gaussian Process Regression (GPR)","authors":"Najat Mohammad Nazari, M. Muhammad, A. Mokhtar","doi":"10.2474/trol.17.135","DOIUrl":"https://doi.org/10.2474/trol.17.135","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72827102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental Study on Leakage and Thermal Features of Herringbone-Grooved Oil-Film-Lubricated Mechanical Face Seals 人字槽油膜润滑机械密封泄漏与热特性试验研究
IF 1
Tribology Online Pub Date : 2022-07-15 DOI: 10.2474/trol.17.126
Yongfan Li, Muming Hao, Baojie Ren, Tianzhao Li, Xinhui Sun
{"title":"Experimental Study on Leakage and Thermal Features of Herringbone-Grooved Oil-Film-Lubricated Mechanical Face Seals","authors":"Yongfan Li, Muming Hao, Baojie Ren, Tianzhao Li, Xinhui Sun","doi":"10.2474/trol.17.126","DOIUrl":"https://doi.org/10.2474/trol.17.126","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"114 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74572201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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