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Transient squeezing flow of the lubricant impregnated in the porous material 浸渍在多孔材料中的润滑剂的瞬态挤压流
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-04-15 DOI: 10.1002/ls.1648
Guotao Zhang, Liangliang Ma, Ting Jiang, Baohong Tong, Meng Li, Liping Shi
{"title":"Transient squeezing flow of the lubricant impregnated in the porous material","authors":"Guotao Zhang,&nbsp;Liangliang Ma,&nbsp;Ting Jiang,&nbsp;Baohong Tong,&nbsp;Meng Li,&nbsp;Liping Shi","doi":"10.1002/ls.1648","DOIUrl":"10.1002/ls.1648","url":null,"abstract":"<p>Porous materials are widely used in friction pairs. The transient squeezing flow of the lubricant significantly affects the lubrication quality. The study found that the lubricant penetrates into the porous matrix in the contact area and exudes upward to the entrance of the contact area. The maximum stress occurs at the subsurface of the contact zone, and the maximum pressure occurs at the contact centre. In the early loading stage, the lubricant exudates, resulting in a higher liquid-phase load. With the prolongation of the time, the average stress decreases and then increases gradually, whilst the average pressure has the opposite change. In the late loading stage, the load is completely borne by the solid phase. Increasing the load will increases the seepage velocity of the lubricant, which enhance the pumping effect of the friction interface. The findings can help for better understanding of the self-lubrication mechanism of the porous materials.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 6","pages":"385-398"},"PeriodicalIF":1.9,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43969831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Lubrication performance of GQDs@PNIPAM microgels for titanium alloys 润滑性能GQDs@PNIPAM钛合金用微凝胶
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-03-16 DOI: 10.1002/ls.1646
Kang Fu, Kequn Sun, Quan Zheng, Lulu Yao, Ruhong Song, Yufu Xu
{"title":"Lubrication performance of GQDs@PNIPAM microgels for titanium alloys","authors":"Kang Fu,&nbsp;Kequn Sun,&nbsp;Quan Zheng,&nbsp;Lulu Yao,&nbsp;Ruhong Song,&nbsp;Yufu Xu","doi":"10.1002/ls.1646","DOIUrl":"10.1002/ls.1646","url":null,"abstract":"<p>The tribological behaviour of YG8-cemented carbide/Ti6Al4V (YG8/TC4) contacts under aqueous lubrication was investigated in this work. Three types of nano-additives including poly (<i>N</i>-isopropylacrylamide) (PNIPAM), graphene quantum dots (GQDs), and GQDs@PNIPAM microgels were prepared for use as water lubricant additives. Tribological tests were conducted at different concentrations of nano-additives using a ball-on-disk reciprocating tribometer. The experimental results show that GQDs@PNIPAM has the optimum lubricating performance, the average friction coefficient decreases by 28.7% and the average cutting wear volume of the TC4 disk increases by 29.5% when the concentration is 1.5 wt.%. This provides a new strategy for the cutting of titanium alloy materials, which not only reduces the friction coefficient, but also increases the cutting wear volume of the TC4 disk, thereby improving the machining efficiency.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"374-384"},"PeriodicalIF":1.9,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47961898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Lubrication impact of ferrofluid on cylinder-plate system: A comparative study using two flow models 铁磁流体对缸板系统的润滑影响：两种流动模型的比较研究
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-03-01 DOI: 10.1002/ls.1645
Rajesh C. Shah
{"title":"Lubrication impact of ferrofluid on cylinder-plate system: A comparative study using two flow models","authors":"Rajesh C. Shah","doi":"10.1002/ls.1645","DOIUrl":"10.1002/ls.1645","url":null,"abstract":"<p>Squeeze-film characteristics between a long cylinder and an infinite flat plate system are analysed. Ferrofluid (FF) lubricant controlled by transverse uniformly strong magnetic field is used for reducing wear and prolonging life of the system. The modified combined Reynolds equation is derived using two different FF flow models (Shliomis and Jenkins), and continuity equation. The expression for dimensionless film-pressure, load-carrying capacity and squeeze time are derived and calculated numerically for different control parameters. The results show significant improvement in the performance of the system when smaller value of minimum film thickness is chosen. Moreover, the phenomenon can be simulated by both the models equally with proper choice of the parameters.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"361-373"},"PeriodicalIF":1.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46985902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Detailed tribological analysis of compressor lubricants used in electrical technology 电气技术中使用的压缩机润滑油的详细摩擦学分析
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-02-14 DOI: 10.1002/ls.1644
Marina Cardozo Vasco, Laís Pastre Dill, Heloisa Colli Moreira, Daniela Wollmann, Helena Wilhelm, Thiago L. Zanin, Giuseppe Pintaude
{"title":"Detailed tribological analysis of compressor lubricants used in electrical technology","authors":"Marina Cardozo Vasco,&nbsp;Laís Pastre Dill,&nbsp;Heloisa Colli Moreira,&nbsp;Daniela Wollmann,&nbsp;Helena Wilhelm,&nbsp;Thiago L. Zanin,&nbsp;Giuseppe Pintaude","doi":"10.1002/ls.1644","DOIUrl":"10.1002/ls.1644","url":null,"abstract":"<p>This work presents a comprehensive tribological analysis comparing the performance of two types of lubricants—a synthetic and a natural ester—used in industrial reciprocating air compressors. A comprehensive tribological analysis comparing the performance of two types of lubricants—synthetic and natural esters—used in industrial reciprocating air compressors were carried out using surface characterisation methods and lubricant analyses. The formed and detected tribo-films were not efficient to avoid the wear observed on the cylinders, although they may have been to avoid the wear on the rings. Regarding the lubricant analyses, particle analysis showed that none of the lubricants favoured solid particle leaching to a greater extent. A biolubricant such as the one employed in this study would be suitable for replacing a mineral lubricant in situations like the ones observed in this work.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"346-360"},"PeriodicalIF":1.9,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44931328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Numerical simulation model of reciprocating rod seal systems with axial wear texture on rod surface 杆面具有轴向磨损组织的往复杆密封系统的数值模拟模型
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-02-03 DOI: 10.1002/ls.1643
Chong Xiang, Fei Guo, Xiaohong Jia, Yuming Wang
{"title":"Numerical simulation model of reciprocating rod seal systems with axial wear texture on rod surface","authors":"Chong Xiang,&nbsp;Fei Guo,&nbsp;Xiaohong Jia,&nbsp;Yuming Wang","doi":"10.1002/ls.1643","DOIUrl":"10.1002/ls.1643","url":null,"abstract":"<p>In this paper, a simulation model of reciprocating rod seal systems when there is axial texture on the rod surface due to wear is studied. The model includes macroscopic solid mechanics analysis, microscopic contact mechanics analysis and fluid mechanics analysis, and on this basis, the change of surface pressure when the sealing ring fall into a texture is calculated by the micro-deformation mechanics analysis of the seal surface. Then, the stiffness matrix method is used to find the film thickness when the three pressures in the sealing area are in equilibrium, completing the fluid–solid coupling calculation. Combined with the above simulation process, the performance parameters of the sealing system such as leakage and friction can be obtained. Results show that axial texture will degrade sealing performance, which increases leakage and friction. The simulation results can quantitative characterise the influence of rod wear on sealing performance and provide some theoretical basis for the study of seal failure mechanism and prediction of seal life.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"327-345"},"PeriodicalIF":1.9,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49606238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Study on the influence of journal form and position errors on the lubrication performance of four-recess capillary restrictor hybrid journal bearing 轴颈形状和位置误差对四槽毛细管节流混合径向轴承润滑性能影响的研究
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-01-19 DOI: 10.1002/ls.1641
Lili Wang, Xue Ge, Jingdong Duan, Longchao Li, Yunlong Bao
{"title":"Study on the influence of journal form and position errors on the lubrication performance of four-recess capillary restrictor hybrid journal bearing","authors":"Lili Wang,&nbsp;Xue Ge,&nbsp;Jingdong Duan,&nbsp;Longchao Li,&nbsp;Yunlong Bao","doi":"10.1002/ls.1641","DOIUrl":"10.1002/ls.1641","url":null,"abstract":"<p>In the actual working condition, due to the manufacturing errors, improper installation, load, thermal deformation or other factors can cause the journal surface to produce the form and position errors. The mathematical models are developed that takes into account the form and position errors, the lubrication performance of four-recess capillary restrictor hybrid journal bearings with different journal tilt angles and cylindricities is studied, and the effect of eccentricity on the oil film lubrication performance is analysed. The results show that the dimensionless oil film pressure and loading capacity increase as the journal tilt angle and eccentricity increase considering journal tilt, and the friction coefficient tends to increase and then decrease. Compared with journal alignment, the oil film thickness distorts, the oil film pressure peak shifts to the edge of bearing, and the horizontal tilt has a greater impact on bearing when the journal is tilted. The oil film pressure distribution has no significant change considering cylindricity errors, while the oil film pressure value increases, the loading capacity increases and the coefficient of friction decreases as the cylindricity and eccentricity increase. The research shows that the presence of a certain cylindricity error contributes to the lubrication performance of four-recess capillary restrictor hybrid journal bearings.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"299-316"},"PeriodicalIF":1.9,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48584069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Forced drop swinging on vibrated and textured metal substrates 在振动和有纹理的金属基材上强迫跌落摆动
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-01-18 DOI: 10.1002/ls.1642
Jing Xu, Dongdong Zhou, Jing Ni, Bin Li, Jiadi Lian
{"title":"Forced drop swinging on vibrated and textured metal substrates","authors":"Jing Xu,&nbsp;Dongdong Zhou,&nbsp;Jing Ni,&nbsp;Bin Li,&nbsp;Jiadi Lian","doi":"10.1002/ls.1642","DOIUrl":"10.1002/ls.1642","url":null,"abstract":"<p>A new type of vibrated drop wettability mechanism on a micro-texture surface is proposed and investigated experimentally and theoretically. In this experiment, the mechanical testing machine is used as the vibration source, and the compound control cabinet is used to adjust the vibration liquid feeding table. By comparing the apparent dynamic contact angle, it is concluded that the surface energy of the second cycle is larger than the first one. A swing model and spring-mass system model are presented to study the vibrated drop motion pattern. The spring-mass system model is built to analyse the adhesion force working process theoretically. The drop surface energy is transmitted by vibration. With the superposition of vibration energy, the displacement of the drop gravity centre becomes larger and larger until the drop migrates. The adhesion force drives the liquid drop to do reciprocating motion, and it changes the liquid drop dynamic wettability.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 5","pages":"317-326"},"PeriodicalIF":1.9,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42879368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Study the reuse possibility of tempering lubricant for cold-rolled strip wet-rolling processing 冷轧带钢湿法轧制回火润滑油再利用的可能性研究
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-01-14 DOI: 10.1002/ls.1639
Jigang Zhao, Weimin Chen, Junjian Zeng
{"title":"Study the reuse possibility of tempering lubricant for cold-rolled strip wet-rolling processing","authors":"Jigang Zhao,&nbsp;Weimin Chen,&nbsp;Junjian Zeng","doi":"10.1002/ls.1639","DOIUrl":"10.1002/ls.1639","url":null,"abstract":"<p>In the wet rolling process of industrial cold-rolled strips, the tempering lubricant was discarded after one-time use, which resulted in huge waste and high costs for wastewater treatment. In order to explore the reuse value and feasibility of the tempering lubricant, the influences of industrial rolling were to be studied first. In the comparison of before and after-use- tempering lubricant, the surface tension decreased by 34%, and the physicochemical indicators such as electrical conductivity, pH, and total alkali value decreased by 4%–14.3%. In terms of the components and related effects, about 15% of heavy organic matter, such as fatty acids and alcohol amine was responsible for lubrication, rust prevention, and corrosion inhibition. These heavy organic solutes would reduce by 2%–6%, with impurities increasing after rolling. However, the waste tempering lubricant still had a high reuse value. Further from the influence of impurities and microorganisms, it was concluded that if the solid powders were filtered out, the bacteriostatic agent was added after 3 days, and the changes in the effective substance concentration of the tempering lubricant were mastered to replace 1/3 of it in time during recycling, then the reuse of the tempering lubricant was feasible.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 4","pages":"279-286"},"PeriodicalIF":1.9,"publicationDate":"2023-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42043485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
A study on the lubrication effects of nano-TiO2 additive water-based lubricants during rolling of ferritic stainless steel strips 纳米TiO2添加剂水基润滑剂在铁素体不锈钢轧制过程中的润滑作用研究
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-01-13 DOI: 10.1002/ls.1640
Xiaoyu Sun, Xiaoguang Ma, Linan Ma, Cunlong Zhou, Jinghui Li, Mingya Zhang, Jingwei Zhao
{"title":"A study on the lubrication effects of nano-TiO2 additive water-based lubricants during rolling of ferritic stainless steel strips","authors":"Xiaoyu Sun,&nbsp;Xiaoguang Ma,&nbsp;Linan Ma,&nbsp;Cunlong Zhou,&nbsp;Jinghui Li,&nbsp;Mingya Zhang,&nbsp;Jingwei Zhao","doi":"10.1002/ls.1640","DOIUrl":"10.1002/ls.1640","url":null,"abstract":"<p>In the present work, a comparison between traditional oil-in-water (O/W) based lubricant and nano-TiO<sub>2</sub> additive water-based lubricants was made to explore the lubrication effects during rolling of ferritic stainless steel (FSS) strips. The results show that marked reduction in rolling force and improvement in the surface quality can be achieved by utilisation of water-based nanolubricant, which can be attributed to the synergism of rolling effect, mending effect, polishing effect and protection film. An optimal concentration of 3.0 wt% TiO<sub>2</sub> nanoparticles is found to exhibit excellent lubrication effects with sufficient nanoparticles at real contact regions without aggregation, leading to 10% reduction in the surface roughness during rolling of FSS strips.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 4","pages":"287-298"},"PeriodicalIF":1.9,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49615876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
The influence of model organosulfur extreme pressure additives and analogues on the corrosion of copper as measured by a wire corrosion test method 用导线腐蚀试验法测定了模型有机硫极压添加剂及其类似物对铜腐蚀的影响
IF 1.9 4区 工程技术
Lubrication Science Pub Date : 2023-01-04 DOI: 10.1002/ls.1625
Gregory J. Hunt, Michael P. Gahagan, Mitchell A. Peplow
{"title":"The influence of model organosulfur extreme pressure additives and analogues on the corrosion of copper as measured by a wire corrosion test method","authors":"Gregory J. Hunt,&nbsp;Michael P. Gahagan,&nbsp;Mitchell A. Peplow","doi":"10.1002/ls.1625","DOIUrl":"10.1002/ls.1625","url":null,"abstract":"<p>A wire corrosion test (WCT) is used to investigate the influence of model organosulfur extreme pressure additives and analogues. The corrosion response from these compounds is discussed with regards to chemical structural type. Corrosion rates were calculated using the guide in ASTM G31 to provide a measurement in mm/year.</p>","PeriodicalId":18114,"journal":{"name":"Lubrication Science","volume":"35 3","pages":"155-162"},"PeriodicalIF":1.9,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ls.1625","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47233100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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