Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology最新文献_第9页

Transient analysis for offset-elliptical journal bearings under misalignment and dynamic loading 偏置椭圆滑动轴承在动载荷和失位作用下的瞬态分析

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-17 DOI: 10.1177/13506501231163920

Kai Wang, Lihua Yang, Haoze Wang, Xilong Ji, Kaidi Zhu

{"title":"Transient analysis for offset-elliptical journal bearings under misalignment and dynamic loading","authors":"Kai Wang, Lihua Yang, Haoze Wang, Xilong Ji, Kaidi Zhu","doi":"10.1177/13506501231163920","DOIUrl":"https://doi.org/10.1177/13506501231163920","url":null,"abstract":"Although the offset-elliptical journal bearings (OEJBs) are widely used in industry, there are few researches on the OEJBs, especially under the conditions of journal misalignment and sudden load. To overcome such deficiency, the dynamic response of misaligned OEJBs subjected to the dynamic load has been studied in this paper. Based on the Reynolds equation, Euler equation, and kinetic equations, a hydrodynamic model is developed and validated to conduct the transient analysis for the OEJBs. Moreover, the modified film thickness of the misaligned OEJB is given. The partial derivative method and the finite difference method are adopted to solve the lubrication equations. The correlations of bearing characteristics such as the minimum film thickness, maximum film pressure, journal orbits, and time-varying dynamic coefficients with the misalignment and dynamic load are studied. In addition, the effects of the misalignment, rotating speed, and clearance ratio on the transient performance of OEJBs under the dynamic load are discussed in detail. The results indicate that the journal misalignment and dynamic load have a significant impact on the transient performance of OEJBs. The decrease of the film thickness caused by the journal misalignment can be aggravated by the suddenly applied load. The proposed model can provide theoretical fundament in the design and monitoring of the dynamically loaded bearing-rotor system.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"os-11 1","pages":"1511 - 1531"},"PeriodicalIF":2.0,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87189357","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: 4

Tribological roles of MoS2 and PTFE nano oils at the rolling/sliding point contacts: Conventional versus textured contacts 二硫化钼和聚四氟乙烯纳米油在滚动/滑动点接触中的摩擦学作用:常规接触与纹理接触

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-15 DOI: 10.1177/13506501231161475

R. Chaudhary, R. Pandey, S. Mazumdar

{"title":"Tribological roles of MoS2 and PTFE nano oils at the rolling/sliding point contacts: Conventional versus textured contacts","authors":"R. Chaudhary, R. Pandey, S. Mazumdar","doi":"10.1177/13506501231161475","DOIUrl":"https://doi.org/10.1177/13506501231161475","url":null,"abstract":"Nanolubricants and surface textures have evidenced the ability to improve the tribo-performances of concentrated contacts. Motivated by this finding as reported in the literature, in the present work, the synergistic uses of laser-created surface textures and nanolubricants have been employed to explore and improve the tribological behaviours of moderately loaded (PH = 0.5 and 0.8 GPa) point contacts operating mainly in mixed and elastohydrodynamic lubrication regimes. MoS2 and polytetrafluoroethylene (PTFE) nanoparticles based on two nanolubricants were prepared in the laboratory to lubricate the rolling/sliding conventional and textured point contacts. Two sets of contacts (grounded discs versus lapped balls and grounded textured discs versus lapped balls) have been employed to create the geometric configuration of conventional and textured concentrated point contacts. Based on the experimental results found herein, the friction coefficient with the textured contacts reduced by 64% in the presence of MoS2-based nanolubricant as compared to the conventional point contact lubricated with the base oil; however, in the presence of polytetrafluoroethylene-based nanolubricant, this reduction has been recorded by 56%. The textured surface involving a small dimple size yielded better results than the relatively large size. Worn surfaces have been investigated and analysed using optical and scanning electron microscopy/energy dispersive X-ray spectroscopy micro-images. Moreover, certain surface studies using atomic force microscope have also been conducted to understand the surface topography and associated wear mechanisms.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"2 1","pages":"1471 - 1486"},"PeriodicalIF":2.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85706506","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

Tribological property and oxidation stability evaluation of rice bran oil with silicon dioxide nanoparticles and spicy aroma-based herbal oils as additives 纳米二氧化硅和香料型草药油对米糠油摩擦学性能及氧化稳定性的影响

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-15 DOI: 10.1177/13506501231162396

Vivek V. Kamal, N.B. Pradeep, Rani Santhakumari amma, M. Arif, Ananthan D. Thampi, Sneha Edla

{"title":"Tribological property and oxidation stability evaluation of rice bran oil with silicon dioxide nanoparticles and spicy aroma-based herbal oils as additives","authors":"Vivek V. Kamal, N.B. Pradeep, Rani Santhakumari amma, M. Arif, Ananthan D. Thampi, Sneha Edla","doi":"10.1177/13506501231162396","DOIUrl":"https://doi.org/10.1177/13506501231162396","url":null,"abstract":"Around the globe, the majority of industries are utilizing mineral oil-based lubricants because of their cost, availability, and compatibility with different engineering materials. The progressive depletion and negative impacts of mineral oil-based products on the environment have led to the search for some potential alternatives. Biodegradable and nontoxic vegetable oils are considered a potential replacement for mineral oils. However, they exhibit certain limitations such as less oxidation stability, poor cloud, and pour point characteristics. In the present study, herbal oils are used as novel antioxidants, and also the synergetic effect of nanoparticles and herbal oils are studied. The modified rice bran oil (MRBO) was formulated using rice bran oil (RBO) as base oil with optimum concentrations of additives such as ginger oil (GO), black pepper (BP) oil, and silicon dioxide nanoparticles. The wear scar diameter (WSD) was reduced significantly by 18.8% after the addition of 0.05 wt.% of SiO2 to RBO. The synergetic effect of herbal oils and SiO2 has significantly reduced the coefficient of friction (COF) of RBO by 15.5%. The oxidation stability of developed oil was also found to be better than RBO when compared to that of commercial lubricant (COM).","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"26 1","pages":"1712 - 1720"},"PeriodicalIF":2.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89128999","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: 1

Micropolar lubricant effects on the performance of partial journal bearings 微极性润滑剂对局部滑动轴承性能的影响

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-15 DOI: 10.1177/13506501231161379

Sanyam Sharma, S. Lambha, V. Mittal, Rajiv Verma

引用次数: 0

Hydrodynamic performance study of a dimple textured surface at various area ratios and sliding speeds using CFD 利用CFD研究不同面积比和滑动速度下凹窝纹理表面的水动力性能

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-13 DOI: 10.1177/13506501231161785

Haniff A Rahman, J. A. Ghani, Wan Mohd Faizal Wan Mahmood, M. Rasani, N. Jouini

引用次数: 0

Effect of direct injection and pivot stiffness on the static performance parameters of tilting pad journal bearings 直喷和枢轴刚度对可倾垫滑动轴承静态性能参数的影响

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-08 DOI: 10.1177/13506501231162119

Thales Freitas Peixoto, F. Tuckmantel, G. Daniel, K. Cavalca

{"title":"Effect of direct injection and pivot stiffness on the static performance parameters of tilting pad journal bearings","authors":"Thales Freitas Peixoto, F. Tuckmantel, G. Daniel, K. Cavalca","doi":"10.1177/13506501231162119","DOIUrl":"https://doi.org/10.1177/13506501231162119","url":null,"abstract":"This work presents a thermo-hydrodynamic model of a tilting pad journal bearing (TPJB) supported on flexible pivots and considering direct injection on the bearing gap. It initially investigates separately each effect on the static characteristics of a TPJB and after, the concomitant influence of both mechanisms on the bearing performance. The study reveals both mechanisms of direct injection and pivot deflection affect the lubricant pressure and temperature distribution. Direct injection is a local effect, mainly influencing the pressure around the injection orifice and the temperature downward it. Pivot flexibility reduces the lubricant pressure and the temperature rise, as the film thickness increases with pivot deflection. For soft pivots, direct injection may reduce even further the lubricant temperature. As the pivot stiffness reduces, the journal displacement increases, but the drag torque is reduced, indicating that bearing mechanical efficiency may be increased if the tilting pads are supported on flexible pivots, whether the journal displacement is within acceptable bounds. Each considered mechanism in a TPJB may affect its performance and should be modeled accordingly.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"31 1","pages":"1487 - 1510"},"PeriodicalIF":2.0,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91246002","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 evaluation of a surface-textured ultrasonic levitation bearing under multi-operation mode 多工况下表面纹理超声悬浮轴承的性能评价

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-08 DOI: 10.1177/13506501231161518

Minghui Shi, Hong Guo, S. Zhang, Shujie Chen, Fengcheng Fan

{"title":"The performance evaluation of a surface-textured ultrasonic levitation bearing under multi-operation mode","authors":"Minghui Shi, Hong Guo, S. Zhang, Shujie Chen, Fengcheng Fan","doi":"10.1177/13506501231161518","DOIUrl":"https://doi.org/10.1177/13506501231161518","url":null,"abstract":"The load capacity of ultrasonic levitation bearing has become an important factor limiting its practical application in engineering, due to which the load capacity is very small compared to that of other gas bearing. In order to obtain greater load capacity, surface texture is introduced into ultrasonic levitation bearing in this study. A theoretical model considering the geometry parameters and mode shape is established to obtain the running performance of surface-textured ultrasonic levitation bearing, which is solved by using eight-point discrete grid finite-difference method. Influence of driving voltage, rotational speed, eccentricity ratio, texture position, and texture size parameters on load capacity is investigated systematically. Previous experimental results were used to verify the feasibility of the proposed model. The results show that positive texture can effectively improve the load capacity of ultrasonic levitation bearing, especially under ultrasonic levitation mode. Research results are instructive for understanding the lubrication mechanism of ultrasonic levitation bearing and further promote the practical application of the bearing in engineering.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"100 1","pages":"1690 - 1705"},"PeriodicalIF":2.0,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90995632","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: 1

Retraction notice 撤销通知

3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-03-07 DOI: 10.1177/13506501231161959

引用次数: 0

Research on the thermohydrodynamic lubrication performance of engine main bearing with rough surface considering the axial motion and deformation of crankshaft 考虑曲轴轴向运动和变形的粗糙表面发动机主轴承热流体润滑性能研究

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-02-28 DOI: 10.1177/13506501231160403

Biao Li, Jun Sun

{"title":"Research on the thermohydrodynamic lubrication performance of engine main bearing with rough surface considering the axial motion and deformation of crankshaft","authors":"Biao Li, Jun Sun","doi":"10.1177/13506501231160403","DOIUrl":"https://doi.org/10.1177/13506501231160403","url":null,"abstract":"In this paper, the influence of the thermal effect on the lubrication performance of engine main bearing with rough surface considering the axial motion of crankshaft is investigated. In the analysis, the crankshaft-bearing system of a four-cylinder four-stroke engine is taken as the object. The axial motion of crankshaft is measured by the engine bench test. The journal load of main bearing and crankshaft deformation are calculated by the whole crankshaft finite-element method. The analysis model is established based on the average flow lubrication model. The lubrication of main bearing is analyzed by the dynamic method. The temperatures of lubricating oil and bearing are calculated by the energy equation and solid heat conduction equation. The results show that the influence degree of the axial motion of crankshaft on the lubrication of engine main bearing with rough surface is greatly affected by the thermal effect. When the thermal effect is considered, the influence of the axial motion of crankshaft on the lubrication of engine main bearing makes its working condition deteriorate further. When the axial motion of crankshaft is considered, the influence of the thermal effect on the lubrication of different main bearings varies significantly.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"22 1","pages":"1446 - 1460"},"PeriodicalIF":2.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86640125","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: 2

Cutting tool wear minimization in drilling operations of titanium alloy Ti-6Al-4V Ti-6Al-4V钛合金钻井作业中刀具磨损最小化

IF 2 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2023-02-19 DOI: 10.1177/13506501231158259

Mohsen Soori, B. Arezoo

{"title":"Cutting tool wear minimization in drilling operations of titanium alloy Ti-6Al-4V","authors":"Mohsen Soori, B. Arezoo","doi":"10.1177/13506501231158259","DOIUrl":"https://doi.org/10.1177/13506501231158259","url":null,"abstract":"Cutting tool wear during drilling operations can cause damage to cutting tools, machine tools, and workpieces which should be analyzed and minimized. Cutting tool wear impacts not just tool life but also the quality of the final product in terms of dimensional accuracy and surface integrity. High mechanical and thermal loads are generated during drilling operations of difficult-to-cut materials such as Ti-6Al-4V alloy which can reduce the life of cutting tool during chip formation process. Thus, to increase the accuracy of drilled parts from titanium alloy Ti6-Al-4V, the cutting tool wear during drilling operations should be accurately predicted in order to be minimized. Application of virtual machining systems is developed in the study in order to predict and minimize the cutting tool wear during drilling operations of titanium alloy Ti-6Al-4V. To predict the tool wear during drilling operations, cutting forces and temperature are calculated. Then, the finite element method (FEM) is utilized to predict the tool wear using the analytical model of Takeyama–Murata and updating the cutting tool geometry during chip formation process. To minimize the cutting tool wear during drilling operations, the optimum drilling parameters of feed rate and spindle speed are obtained using the Taguchi method-based response surface analysis algorithm. As a result, optimized drilling parameters are used in order to minimize the cutting tool wear during drilling operations. To validate the study, the experimental works are implemented to the sample workpiece from titanium alloy Ti6-Al4-V and the values of tool wear are then measured. To present the effectiveness of the proposed virtual machining system in minimization of cutting tool wear, the obtained results with and without optimized machining parameters are evaluated and compared. So, precision and productivity in drilling operations of titanium alloy Ti6-Al4-V can be enhanced using the developed virtual machining system in the study.","PeriodicalId":20570,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology","volume":"18 1","pages":"1250 - 1263"},"PeriodicalIF":2.0,"publicationDate":"2023-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81836516","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: 8