Lubricants最新文献_第8页

Carrying Capacity of Spherical Hydrostatic Bearings including Elastic Deformation 球面静压轴承的承载能力（包括弹性变形

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-15 DOI: 10.3390/lubricants12030097

Shengdong Zhang, Dongjiang Yang, Guangming Li, Yongchao Cheng, Guang Chen, Zhiming Zhang, Jichao Li

引用次数: 0

Erosive Wear of Structured Carbon-Fibre-Reinforced Textile Polymer Composites under Sands Blasting 结构化碳纤维增强纺织聚合物复合材料在喷砂过程中的侵蚀磨损

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-15 DOI: 10.3390/lubricants12030094

Tong Deng, Vivek Garg, Michael S.A. Bradley

{"title":"Erosive Wear of Structured Carbon-Fibre-Reinforced Textile Polymer Composites under Sands Blasting","authors":"Tong Deng, Vivek Garg, Michael S.A. Bradley","doi":"10.3390/lubricants12030094","DOIUrl":"https://doi.org/10.3390/lubricants12030094","url":null,"abstract":"Textile polymer composite is made of structured fibre matrix using textile technologies in fabrication, and gains benefits from strong mechanical properties with extra light weight. However, erosion behaviours and associated wear mechanisms of the composites may be influenced by the fibre structures due to heterogeneous composition and complex architectural topologies. Understanding the erosive mechanisms of the structured composites can be important, not only for preventing surface damage and loss of mechanical strength but also for improving design and fabrication of the composites. This paper presents an experimental study of erosive wear under sand blasting on 3D woven carbon-fibre-reinforced textile composites with epoxy. The architectural topology methods of the composites include non-crimped bidirectional, tufted bidirectional, 3D layer-to-layer and 3D orthogonal textile methods. The erosion tests were conducted on four impact angles (20°, 30°, 45° and 90°) under one impact velocity at 40 m/s. The study results show that the erosive mechanism of the textile composites is different from that of the neat substrate material. The observations from this study also reveal the different erosive behaviours between the composites with different fibre structures. It concludes that architectural structures can influence the erosion of a textile composite but will not result in significant differences in the wear resistance of the composites (<20%).","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation and Validation of Planet Gear Sliding Bearings for a Three-Stage Wind Turbine Gearbox 三级风力涡轮机齿轮箱行星齿轮滑动轴承的计算与验证

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-15 DOI: 10.3390/lubricants12030095

Huanhuan Ding, Ümit Mermertas, Thomas Hagemann, H. Schwarze

{"title":"Calculation and Validation of Planet Gear Sliding Bearings for a Three-Stage Wind Turbine Gearbox","authors":"Huanhuan Ding, Ümit Mermertas, Thomas Hagemann, H. Schwarze","doi":"10.3390/lubricants12030095","DOIUrl":"https://doi.org/10.3390/lubricants12030095","url":null,"abstract":"In recent years, the trend towards larger wind turbines and higher power densities has led to increasing demands on planet gear bearings. The use of sliding bearings instead of rolling bearings in planetary bearings makes it possible to increase the power density with lower component costs and higher reliability. Therefore, the use of planet gear sliding bearings in wind turbine gearboxes has become more common. However, the flexible structure and complex load conditions from the helical tooth meshes lead to highly complex elastic structure deformation that modifies the lubricant film thickness and pressure distribution and, thus, has to be considered in the calculation of the bearing’s load-carrying capacity. This paper introduces a highly time-efficient calculation procedure that is validated with pressure measurement data from a three-stage planetary gearbox for a multi-megawatt wind energy plant. The investigations focus on three main objectives: (i) analyses of experimental and predicted results for different load cases, (ii) validation of the results of planet gear sliding bearing code, and (iii) discussion on mandatory modeling depths for the different planet stages. Results indicate the necessity of further research in this field of applications, particularly for the third-stage bearings.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140238139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Titanium Nitride Coatings on CoCrMo and Ti6Al4V Alloys: Effects on Wear and Ion Release CoCrMo 和 Ti6Al4V 合金上的氮化钛涂层：对磨损和离子释放的影响

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-15 DOI: 10.3390/lubricants12030096

Mohammed AbuAlia, S. Fullam, Filippo Cinotti, Noora Manninen, Markus A. Wimmer

{"title":"Titanium Nitride Coatings on CoCrMo and Ti6Al4V Alloys: Effects on Wear and Ion Release","authors":"Mohammed AbuAlia, S. Fullam, Filippo Cinotti, Noora Manninen, Markus A. Wimmer","doi":"10.3390/lubricants12030096","DOIUrl":"https://doi.org/10.3390/lubricants12030096","url":null,"abstract":"While titanium nitride (TiN) coatings are well known for their biocompatibility and excellent mechanical properties, their wear particle and debris release in orthopedic implants remains a matter of active investigation. This study addresses the efficacy of TiN coatings on CoCrMo and Ti6Al4V alloys to enhance wear resistance and reduce ion release from prosthetic implants. Three different coating variants were utilized: one variant deposited using arc evaporation (Arc) followed by post-treatment, and two variants deposited using high-power impulse magnetron sputtering (HiPIMS) with or without post-treatment. The coatings’ performance was assessed through standard wear testing against ultra-high-molecular-weight polyethylene (UHMWPE) in bovine serum lubricant, and in the presence of abrasive PMMA bone cement particles in the lubricant. The results indicated that Arc and HiPIMS with post-treatment significantly reduced wear and eliminated detectable metal ion release, suggesting that these coatings could extend implant longevity and minimize adverse biological responses. Further long-term simulator and in vivo studies are recommended to validate these promising findings.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140241205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Examining Wear Mechanisms in Railway Wheel Steels: Experimental Insights and Predictive Mapping 研究铁路车轮钢的磨损机制：实验启示与预测绘图

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-14 DOI: 10.3390/lubricants12030093

Nicola Zani, A. Mazzù, Luigi Solazzi, C. Petrogalli

{"title":"Examining Wear Mechanisms in Railway Wheel Steels: Experimental Insights and Predictive Mapping","authors":"Nicola Zani, A. Mazzù, Luigi Solazzi, C. Petrogalli","doi":"10.3390/lubricants12030093","DOIUrl":"https://doi.org/10.3390/lubricants12030093","url":null,"abstract":"Railway systems play a pivotal role in modern transportation networks, contributing to both efficiency and environmental sustainability. This study investigated the multifaceted aspects of wear phenomena in railway engineering, focusing on their significant implications for environmental costs and operational efficiency. Experimental trials were conducted using a high-performance bi-disc apparatus, evaluating a range of materials, contact pressures, and lubrication conditions. Shakedown maps were employed to assess ratcheting behaviour, while the wear rate was analysed as a function of the fatigue index (FI). The results reveal the intricate interplay of contact pressure, slip ratio, material properties, and lubrication in determining wear and ratcheting behaviour. Oxidative and mild wear mechanisms were identified, and wear debris composition and morphology were characterised. The outcomes from this research clarify the pivotal role that wear processes play within railway systems and the far-reaching environmental repercussions they entail. This exploration contributes to the ongoing optimisation of railway operations, offering valuable insights aimed at mitigating unavoidable pollution sources and strengthening sustainability efforts. By delving into the intricate dynamics of wear phenomena within wheel–rail material, this research paves the way for innovative solutions that not only enhance operational efficiency but also minimise the ecological footprint of railway transportation.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140243285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning-Based Predictive Model to Assess Rheological Dynamics of Eco-Friendly Oils as Biolubricants Enriched with SiO2 Nanoparticles 基于机器学习的预测模型来评估作为富含二氧化硅纳米颗粒的生物润滑剂的环保油的流变动力学特性

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-14 DOI: 10.3390/lubricants12030092

Girish Hariharan, Meghana K. Navada, Jeevan Brahmavar, Ganesha Aroor

{"title":"Machine Learning-Based Predictive Model to Assess Rheological Dynamics of Eco-Friendly Oils as Biolubricants Enriched with SiO2 Nanoparticles","authors":"Girish Hariharan, Meghana K. Navada, Jeevan Brahmavar, Ganesha Aroor","doi":"10.3390/lubricants12030092","DOIUrl":"https://doi.org/10.3390/lubricants12030092","url":null,"abstract":"Efficient machinery operation relies on the performance of high-quality lubricants. Currently, mineral oils of different grades are widely employed for lubricating machine components, but their environmental impact is a concern. Biolubricants are potential alternatives to mineral oils due to environmental factors. The present study focuses on assessing the rheological characteristics of SiO2 nanoparticle (NP)-enhanced ecofriendly biolubricants for near zero and high-temperature conditions. Pure neem oil, pure castor oil and a 50:50 blend of both oils were considered as the base oils. Nanobiolubricants with enhanced dispersion stability were prepared for varied concentrations of NPs using an ultrasonification method. Viscosity analysis was conducted using an MCR-92 rheometer, employing the Herschel Bulkley model to precisely characterize the viscosity behavior of bio-oils. Due to the fluid–solid interaction between SiO2 NPs and bio-oils, a crossover trend was observed in the flow curves generated for different base oils enriched with SiO2 NPs. For neem oil, a significant increase in viscosity was noted for 0.2 wt% of NPs. Using the multilayer perceptron (MLP) algorithm, an artificial neural network (ANN) model was developed to accurately predict the viscosity variations in nanobiolubricants. The accuracy of the predicted values was affirmed through experimental investigations at the considered nanoSiO2 weight concentrations.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140242099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tribofilm Formation and Friction Reduction Performance on Laser-Textured Surface with Micro-Grooved Structures 带有微槽结构的激光纹理表面上的三膜形成和减摩性能

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-13 DOI: 10.3390/lubricants12030091

Qianru Li, Renguo Lu, H. Tani, Shohei Kawada, S. Koganezawa, Xujun Liu, Peihong Cong

{"title":"Tribofilm Formation and Friction Reduction Performance on Laser-Textured Surface with Micro-Grooved Structures","authors":"Qianru Li, Renguo Lu, H. Tani, Shohei Kawada, S. Koganezawa, Xujun Liu, Peihong Cong","doi":"10.3390/lubricants12030091","DOIUrl":"https://doi.org/10.3390/lubricants12030091","url":null,"abstract":"Tribofilms, resulting from tribochemical reactions involving lubricants, additives, and metal surfaces, are pivotal in reducing friction, preventing adhesion, and minimizing wear. This study investigates the tribological characteristics of textured surfaces in boundary lubrication, emphasizing the impact of surface texturing on tribofilm formation. Untextured surfaces manifest high friction coefficients and low wear owing to the development of thick tribofilms. However, debris accumulation impedes further tribochemical reactions, necessitating more energy for sliding and resulting in higher friction coefficients. Additionally, molybdenum dialkyl dithiocarbamate-derived MoS2 oxidation diminishes the expected lubrication effect. Textured surfaces exhibit lower friction coefficients and higher wear because the structure aids debris removal, promoting the formation of thinner tribofilms. Despite increased wear from solid-to-solid contact, textured surfaces facilitate an early fluid lubrication transition and enhance cavitation capacity, leading to reduced friction coefficients. We also consider the impact of sliding direction angles on friction coefficients, revealing that lower angles parallel to the grooves heighten friction, whereas higher angles enhance cavitation capacity. Unexpectedly, a 90° sliding direction angle increases the friction coefficients, attributed to MoS2 distribution in the tribofilms. These results provide crucial insights for optimizing lubrication strategies and enhancing wear resistance in boundary lubrication scenarios.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140245846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Performance of Carbon-Based Nanomaterials in Different Base Oils and an Oil Blend 碳基纳米材料在不同基础油和混合油中的性能

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-13 DOI: 10.3390/lubricants12030090

Jack Nasr, Diana Cursaru

{"title":"The Performance of Carbon-Based Nanomaterials in Different Base Oils and an Oil Blend","authors":"Jack Nasr, Diana Cursaru","doi":"10.3390/lubricants12030090","DOIUrl":"https://doi.org/10.3390/lubricants12030090","url":null,"abstract":"Different carbon-based nanomaterials (fullerenes, graphene, SWCNTs, and SWCNT-COOH) were tested as additives in a base mineral oil, SN150; rapeseed oil (RSO); and a 50/50 by volume blend of the two using an HFRR (high-frequency reciprocating rig) tester for coefficient of friction (COF) and wear scar diameter (WSD) determinations and a four-ball tester for welding point determinations. The concentrations considered for the HFRR tests were 0.1, 0.5, 1, and 2 wt.%, while the concentration considered for the welding point tests was 0.5 wt.%. The results of the welding point tests showed that the addition of different nanoparticles made it so that welding occurred at much lower pressures compared to the pure oils. This is due to the hardness of the nanoparticles, which increases the local temperature and pressure at the contact points between them and the surfaces, causing welding to occur much sooner. The results of the HFRR tests showed a possible synergistic effect between the fullerenes and SWCNT-COOH and the oil blend, which may be attributed to possible interactions that occurred at a molecular level between the nanoparticles and the different molecules of the oil blend.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Behavior of Lubricated Bearings in Electric Circuits 电路中润滑轴承的行为

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-11 DOI: 10.3390/lubricants12030089

E. Kirchner, M. Bartz, F. Becker-Dombrowsky

引用次数: 0

Green-Emitting Carbon Quantum Dots: Highly Sensitive Temperature Sensing Probe in Nanocomposite and Lubrication System 绿色发光碳量子点：纳米复合材料和润滑系统中的高灵敏度温度传感探针

IF 3.5 3区工程技术

Lubricants Pub Date : 2024-03-11 DOI: 10.3390/lubricants12030088

Jiannan Sun, Ke Yan, Pan Zhang, A. Pan, Xuehang Chen, Xinyi Shi

{"title":"Green-Emitting Carbon Quantum Dots: Highly Sensitive Temperature Sensing Probe in Nanocomposite and Lubrication System","authors":"Jiannan Sun, Ke Yan, Pan Zhang, A. Pan, Xuehang Chen, Xinyi Shi","doi":"10.3390/lubricants12030088","DOIUrl":"https://doi.org/10.3390/lubricants12030088","url":null,"abstract":"Carbon quantum dots (CQDs) have already demonstrated their utility as lubricant additives, and non-contact temperature sensing based on CQDs offers considerable potential for condition monitoring in mechanical, electrical, and other fields, as well as lubrication-temperature multifunctional applications in lubricants. In this paper, we have successfully synthesized and designed high-brightness carbon quantum dots/polyvinyl alcohol (PVA) temperature sensor thin film and dispersions of CQDs in a liquid paraffin lubrication system. Based on fluorescence intensity and the fluorescence intensity ratio, the carbon quantum dot/PVA film exhibited exponential temperature-dependent properties with a wide applicability range, a high goodness of fit (R2 > 0.99), and high relative thermal sensitivity (relative sensitivities of 1.74% K−1 and 1.39% K−1 for fluorescence intensity and fluorescence intensity ratio, respectively). In addition, based on the fluorescence intensity, the CQDs exhibited a wide temperature range (20–90 °C), a high goodness of fit (R2 > 0.99), and higher sensitivity (2.84% K−1) in a liquid paraffin lubrication system, which reflects the temperature responsive properties of carbon quantum dots as additives in lubrication systems. These findings provide convenient and effective possibilities for the sensing and monitoring of carbon quantum dots and their multifunctional applications under lubrication systems.","PeriodicalId":18135,"journal":{"name":"Lubricants","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0