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Analysis of turbulent cavitation effects on water-lubricated bearing in single screw compressors Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-24 Qingyang Wang, Weifeng Wu, Ping Zhang, Chengqiang Guo, Yifan Yang
Purpose To guide the stable radius clearance choice of water-lubricated bearings for single screw compressors, this paper aims to analyze the effects of turbulence and cavitation on bearing performance under two conditions of specified external load and radius clearance. Design/methodology/approach A modified Reynolds equation considering turbulence and cavitation is adopted, based on the Jakobsson–Floberg–Olsson
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Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-18 Amanda Norazman, Zulhanafi Paiman, Syahrullail Samion, Muhammad Noor Afiq Witri Muhammad Yazid, Zuraidah Rasep
Purpose The purpose of this paper is to investigate the performance of bio-based lubricants (BBL), namely, palm mid-olein (PMO) enriched with an antioxidant agent, tertiary-butylhydroquinone (TBHQ) and a viscosity improver, ethylene-vinyl acetate (EVA), in journal bearing (JB) applications. Design/methodology/approach Samples of the BBL were prepared by blending it with TBHQ and EVA at various blending
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Tribological properties of aluminum alloy coated with graphene oxide/polyvinyl alcohol composites after micro-arc oxidation Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-17 Jian Sun, Zhanshuai Fan, Yi Yang, Chengzhi Li, Nan Tu, Jian Chen, Hailin Lu
Purpose Aluminum alloy is considered an ideal material in aerospace, automobile and other fields because of its lightweight, high specific strength and easy processing. However, low hardness and strength of the surface of aluminum alloys are the main factors that limit their applications. The purpose of this study is to obtain a composite coating with high hardness and lubricating properties by applying
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Slip flow and thermal characteristics in gas thrust bearings with rough surfaces Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-17 Cheng Xiong, Bo Xu, Zhenqian Chen
Purpose This study aims to investigate the rarefaction effects on flow and thermal performances of an equivalent sand-grain roughness model for aerodynamic thrust bearing. Design/methodology/approach In this study, a model of gas lubrication thrust bearing was established by modifying the wall roughness and considering rarefaction effect. The flow and lubrication characteristics of gas film were discussed
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Tribological performances of MoS2/C60 nanocomposite as lubricating additive in dioctyl sebacate Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-16 Ziyan Lu, Feng Qiu, Hui Song, Xianguo Hu
Purpose This paper aims to solve the problems molybdenum disulfide (MoS2) nanosheets suffer from inadequate dispersion stability and form a weak lubricating film on the friction surface, which severely limits their application as lubricant additives. Design/methodology/approach MoS2/C60 nanocomposites were prepared by synthesizing molybdenum disulfide (MoS2) nanosheets on the surface of hydrochloric
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Characterization of the friction-induced attractor trajectories during the running-in process in ball-on-disk tribosystem Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-10 Yuting Wang, Guodong Sun, Haisheng Wang, Bobo Jian
Purpose The purpose of this study is to solve the issues of time-consuming and complicated computation of traditional measures, as well as the underutilization of two-dimensional (2D) phase-trajectory projection matrix, so a new set of features were proposed based on the projection of attractors trajectory to characterize the friction-induced attractors and to reveal the tribological behavior during
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Effects of Spectrum Loading and break in period using molybdenum disulphide (MoS2) and zinc dialkyl dithiophosphate (ZDDP) as EP additives in lithium based grease Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-16 Gabi N. Nehme, Najat G. Nehme
Purpose The purpose of variable loading conditions (392 N-785N-392N-785N) with break-in period were used to study interactions between zinc dialkyl dithiophosphate (ZDDP) 0.1 P% (phosphorus) and fine-grade molybdenum disulfide (MoS2) 3%, in different mixtures of NLGI 2 lithium stearate grease. Four-ball wear tests were used to evaluate the tribological properties of different grease mixtures such as
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Influence of microtextured parameters of dry gas sealing rings on tribological performance Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-12 Delin Chen
Purpose This study aims to research the influence mechanism of microtextured geometric parameters of dry gas seal end face on the tribological behavior under dry frictional conditions. Design/methodology/approach The microtexture was processed using laser processing, while the diamond-like carbon (DLC) film was applied through magnetron sputtering; the experimental platform of friction vibration was
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Effect of texture parameters on the lubrication performance of static and dynamic pressure thrust bearings and multi-objective optimization Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-12 Xiaodong Yu, Guangqiang Shi, Hui Jiang, Ruichun Dai, Wentao Jia, Xinyi Yang, Weicheng Gao
Purpose This paper aims to study the influence of cylindrical texture parameters on the lubrication performance of static and dynamic pressure thrust bearings (hereinafter referred to as thrust bearings) and to optimize their lubrication performance using multiobjective optimization. Design/methodology/approach The influence of texture parameters on the lubrication performance of thrust bearings was
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A comprehensive review of non-destructive methods for bearing lubricating oil film thickness measurement Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-04-08 Fei Shang, Bo Sun, Dandan Cai
Purpose The purpose of this study is to investigate the application of non-destructive testing methods in measuring bearing oil film thickness to ensure that bearings are in a normal lubrication state. The oil film thickness is a crucial parameter reflecting the lubrication status of bearings, directly influencing the operational state of bearing transmission systems. However, it is challenging to
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Prediction and comparative analysis of friction material properties using a GA-SVM optimization model Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-29 Jianping Zhang, Leilei Wang, Guodong Wang
Purpose With the rapid advancement in the automotive industry, the friction coefficient (FC), wear rate (WR) and weight loss (WL) have emerged as crucial parameters to measure the performance of automotive braking systems, so the FC, WR and WL of friction material are predicted and analyzed in this work, with an aim of achieving accurate prediction of friction material properties. Design/methodology/approach
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Friction and wear performances of 7075 aluminum alloy surface with V-shaped microtexture via numerical simulation and experimental characterizations Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-26 Cong Ding, Zhizhao Qiao, Zhongyu Piao
Purpose The purpose of this study is to design and process the optimal V-shaped microstructure for 7075 aluminum alloy and reveal its wear resistance mechanism and performance. Design/methodology/approach The hydrodynamic pressure lubrication models of the nontextured, V-shaped, circular and square microtextures are established. The corresponding oil film pressure distributions are explored. The friction
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Effect of line parameters on wheel wear of heavy–haul freight vehicle Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-22 Hongkun Wang, Yongxiang Zhao, Yayun Qi, Yufeng Cao
Purpose The serious wear problem of heavy-haul freight vehicle wheels affects the safety and economy of vehicle operation. This paper aims to study wheel wear evolution law and the influence of line parameters on wheel wear of heavy-haul freight, and provide the basis for operation and line maintenance. Design/methodology/approach The wheel wear test data of heavy-haul freight vehicles were analyzed
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Laboratory evaluation of a nanostructured lubricating grease for tram runflat tires Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-20 Mauricio Pérez Giraldo, Mauricio Vasquez, Alejandro Toro, Robison Buitrago-Sierra, Juan Felipe Santa
Purpose This paper aims to develop a stable gel-type lubricant emulating commercial conditions. This encompassed rheological and tribological assessments, alongside field trials on the Medellín tram system. Design/methodology/approach The gel-type lubricant with graphite and aluminum powder is synthesized. Rheological tests, viscosity measurements and linear viscoelastic regime assessments are conducted
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Static and dynamic characteristics of large-span six-slider closed hydrostatic guideway considering pitch moment and yaw moment Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-20 Heji Zhang, Dezhao Lu, Wei Pan, Xing Rong, Yongtao Zhang
Purpose The purpose of this study is to design a closed hydrostatic guideway has the ability to resist large-side load, pitch moments and yaw moments, has good stiffness and damping characteristics, and provides certain beneficial guidance for the design of large-span closed hydrostatic guideway on the basis of providing a large vertical load bearing capacity. Design/methodology/approach The Reynolds’
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Tribological performance of ficus carica oil modified with ethylene vinyl acetate and sodium dodecyl benzenesulfonate Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-15 Audu Ibrahim Ali, Mohd Kameil Abdul Hamid, Mohd Azman Bin Abas, Mohd Farid Muhamad Said, Anthony Chukwunonso Opia, Izhari Izmi Bin Mazali, Zul Hilmi Bin Che Daud
Purpose Due to the environmental issues caused by petroleum lubricants used in lubrication, the concept of creating various bio-lubricants requires research globally. Thus, this study aims to develop, characterize and test the base ficus carica oil (fig oil) for its ethylene vinyl acetate copolymer (EVA) and sodium dodecylbenzene sulfonate (SDBS) content. Design/methodology/approach The sample characterization
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Study on dynamic characteristics of acceleration process of spherical hybrid sliding bearings rotor system Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-14 Weiqiang Xue, Jingfeng Shen, Yawen Fan
Purpose The transient loads on the spherical hybrid sliding bearings (SHSBs) rotor system during the process of accelerating to stable speed are related to time, which exhibits a complex transient response of the rotor dynamics. The current study of the shaft center trajectory of the SHSBs rotor system is based on the assumption that the rotational speed is constant, which cannot truly reflect the
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Performance analysis of columnar convex-concave compound microtexture thrust bearing Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-11 Lili Wang, Ying’ao Liu, Jingdong Duan, Yunlong Bao
Purpose This study aims to enhance the lubrication performance of thrust bearings. The influence of columnar convex–concave compound microtexture on bearing performance is investigated Design/methodology/approach Based on the compound microtexture model of thrust bearings, considering surface roughness and turbulent effect, the variation of lubrication characteristics with the change in the compound
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Study on friction reduction performance of granular flow lubrication during the milling of Inconel 718 superalloy Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-08 Lijie Ma, Xinhui Mao, Chenrui Li, Yu Zhang, Fengnan Li, Minghua Pang, Qigao Feng
Purpose The purpose of this study is to reveal the friction reduction performance and mechanism of granular flow lubrication during the milling of difficult-to-machining materials and provide a high-performance lubrication method for the precision cutting of nickel-based alloys. Design/methodology/approach The milling tests for Inconel 718 superalloy under dry cutting, flood lubrication and granular
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Synergistic lubrication effects of Sn–Ag–Cu and MXene–Ti3C2 to improve tribological properties of M50 bearing steel with microporous channels Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-08 Yuchun Huang, Haishu Ma, Yubo Meng, Yazhou Mao
Purpose This paper aims to study the synergistic lubrication effects of Sn–Ag–Cu and MXene–Ti3C2 to improve the tribological properties of M50 bearing steel with microporous channels. Design/methodology/approach M50 matrix self-lubricating composites (MMSC) were designed and prepared by filling Sn–Ag–Cu and MXene–Ti3C2 in the microporous channels of M50 bearing steel. The tribology performance testing
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Effects of surface morphology on the performance of water-lubricated thrust bearings Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-03-01 Jun Cheng, Chunxing Gu
Purpose As the crucial support component of the propeller power system, the reliability of the operation of submersible pumps is influenced by the lubrication performance of water-lubricated thrust bearings. When the water-lubricated thrust bearings are under start-stop or heavy load conditions, the effect of surface morphology is crucial as the mixed lubrication regime is encountered. This paper aims
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Experimental study on adhesion recovery based on a circumferential test rig Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-02-13 Jiajun Zhou, Chao Chen, Chun Tian, Gengwei Zhai, Hao Yu
Purpose To authenticate the existence and principles of the adhesion recovery phenomenon under water pollution conditions, an innovative circumferential rail–wheel adhesion test rig was used. The study conducted extensive tests on the adhesion characteristics under large sliding conditions. Design/methodology/approach Experiments were conducted to investigate the influence of speed, axle load and slip
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Simulation and analysis of micro-textured rough curved surface based on fractal characterization method Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-02-09 Chunxia Zhu, Xianling Meng
Purpose Micro-texture is processed on the surface to reduce the friction of the contact surface, and its application is more and more extensive. The purpose of this paper is to create a texture function model to study the influence of surface parameters on the accuracy of the simulated surface so that it can more accurately reflect the characteristics of the real micro-textured surface. Design/methodology/approach
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Vibration behavior of a 3D-printed hybrid polymer bearing with outer race defect Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-02-07 Burcu Küçükoğlu Doğan, Abdurrahim Dal, Görkem Ağören, Tuncay Karaçay
Purpose In industry applications, polymer hybrid bearings have become widespread in recent years owing to the lack of lubricant requirements, particularly in areas requiring hygiene. The additive manufacturing method gives significant advantages to have complex machinery parts, and it has become popular in the industry in recent years. However, it has some inherent disadvantages caused by layered deposition/addition
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Insights into modeling approaches for boundary- and mixed-lubricated conditions Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-02-07 Rajesh Shah, Blerim Gashi, Vikram Mittal, Andreas Rosenkranz, Shuoran Du
Purpose Tribological research is complex and multidisciplinary, with many parameters to consider. As traditional experimentation is time-consuming and expensive due to the complexity of tribological systems, researchers tend to use quantitative and qualitative analysis to monitor critical parameters and material characterization to explain observed dependencies. In this regard, numerical modeling and
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Effect of pocket orientation on four pocket hybrid journal bearing operating with piezo-viscous polar lubricant Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-02-01 Vishal Singh, Arvind K. Rajput
Purpose The present paper aims to analyse the synergistic effect of pocket orientation and piezo-viscous-polar (PVP) lubrication on the performance of multi-recessed hybrid journal bearing (MHJB) system. Design/methodology/approach To simulate the behaviour of PVP lubricant in clearance space of the MHJB system, the modified form of Reynolds equation is numerically solved by using finite element method
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Interactive spatiotemporal LSTM approach for enhanced industrial fault diagnosis Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-31 Tan Zhang, Zhanying Huang, Ming Lu, Jiawei Gu, Yanxue Wang
Purpose Rotating machinery is a crucial component of large equipment, and detecting faults in it accurately is critical for reliable operation. Although fault diagnosis methods based on deep learning have been significantly developed, the existing methods model spatial and temporal features separately and then weigh them, resulting in the decoupling of spatiotemporal features. Design/methodology/approach
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Effect of process parameters on the growth and wear resistance of CrAlN coating on silicon nitride surface Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-29 He Lu, Yuhou Wu, Zijin Liu, He Wang, Guangyu Yan, Xu Bai, Jiancheng Guo, Tongxiang Zheng
Purpose Preparing CrAlN coatings on the surface of silicon nitride bearings can improve their service life in oil-free lubrication. This paper aims to match the optimal process parameters for preparing CrAlN coatings on silicon nitride surfaces, and reveal the microscopic mechanism of process parameter influence on coating wear resistance. Design/methodology/approach This study used molecular dynamics
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Parametric optimization to establish eco-friendly nanofluid minimum quantity lubrication (NMQL) practice for turning superalloy Inconel 718 Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-25 Talwinder Singh
Purpose The purpose of this paper, an experimental study, is to investigate the optimal machining parameters for turning of nickel-based superalloy Inconel 718 under eco-friendly nanofluid minimum quantity lubrication (NMQL) environment to minimize cutting tool flank wear (Vb) and machined surface roughness (Ra). Design/methodology/approach The central composite rotatable design approach under response
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Effect of nano-AlN, Al2O3 on friction and wear properties of copper-steel clad plate immersed in the lubricants Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-25 Xiaoxuan Lin, Xiong Sang, Yuyan Zhu, Yichen Zhang
Purpose This paper aims to investigate the preparation of AlN and Al2O3, as well as the effect of nano-AlN and nano-Al2O3, on friction and wear properties of copper-steel clad plate immersed in the lubricants. Design/methodology/approach Nano-AlN or nano-Al2O3 (0.1, 0.2, 0.3, 0.4 and 0.5 Wt.%) functional fluids were prepared. Their tribological properties were tested by an MRS-10A four-ball friction
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Numerical simulation study of high-speed lip seal considering eccentricity Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-25 Guibin Tan, Jinfu Li, Cheng Zhou, Ziwei Luo, Xing Huang, Fei Guo
Purpose This paper aims to focus on the high-speed rotary lip seal in aircraft engines, combining its service parameters, its own structure and application conditions, to study the influence of different eccentric forms, eccentricity, rotational speed and other factors on the performance of the rotary lip seal. Design/methodology/approach A numerical simulation model for high-speed eccentric rotary
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Study on structure optimization and performance improvement of Y-shaped water seal of rock drill Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-25 Chun Qiang Jia, Aofei Wang, Ling Yu, Li Zong
Purpose The rock drill’s drill tail experiences high-frequency fretting simultaneously in the rotational and axial directions. Due to the complex working characteristics and the low viscosity of the water medium, the pure water seal is susceptible to damage and failure. The purpose of this paper is to enhance the water seal’s performance. Design/methodology/approach The Y-shaped seal ring is modeled
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Effect of ball–material ratio on Cu-Bi mixed powder and self-lubricating material properties Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-22 Cong Liu, Yanguo Yin, Rongrong Li
Purpose This study aims to investigate the effects of ball–material ratio on the properties of mixed powders and Cu-Bi self-lubricating alloy materials. Design/methodology/approach Cu-Bi mixed powder was ball milled at different ball–material ratios, and the preparation of Cu-Bi alloy materials was achieved through powder metallurgy technology. Scanning electron microscopy, X-ray diffraction and Raman
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Fractal contact resistance model of wind pitch slip ring considering wear and self-excited vibration Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-18 Minglang Zhang, Xue Zuo, Yuankai Zhou
Purpose The purpose of this paper is to reveal the dynamic contact characteristics of the slip ring. Dynamic contact resistance models considering wear and self-excited were established based on fractal theory. Design/methodology/approach The effects of tangential velocity, stiffness and damping coefficient on dynamic contact resistance are studied. The relationships between fractal parameters, wear
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Effects and optimization of bionic texture parameters on the tribological behavior of line contacts under starved lubrication conditions Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-16 Longchang Zhang, Qi Chen, Yanguo Yin, Hui Song, Jun Tang
Purpose Gears are prone to instantaneous failure when operating under extreme conditions, affecting the machinery’s service life. With numerous types of gear meshing and complex operating conditions, this study focuses on the gear–rack mechanism. This study aims to analyze the effects and optimization of biomimetic texture parameters on the line contact tribological behavior of gear–rack mechanisms
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TiO2 and CeO2 nanoparticles as lithium complex grease additives for enhanced lubricity Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-08 Zhicai Du, Qiang He, Hengcheng Wan, Lei Zhang, Zehua Xu, Yuan Xu, Guotao Li
Purpose This paper aims to improve the tribological properties of lithium complex greases using nanoparticles to investigate the tribological behavior of single additives (nano-TiO2 or nano-CeO2) and composite additives (nano-TiO2–CeO2) in lithium complex greases and to analyze the mechanism of their influence using a variety of characterization tools. Design/methodology/approach The morphology and
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Study on the subsurface characteristics of textured surfaces under EHL condition Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-08 Zhi Li, YiYuan Du, Zhiming Xu, Xuqian Qiao, Hong Zhang
Purpose The purpose of this study is to investigate the influence of surface texture on the subsurface characteristics of contact interfaces under elastohydrodynamic lubrication condition. As a typical contact form of gears and bearings, the optimization of friction characteristics at the elastohydrodynamic lubrication (EHL) interface has attracted the attention of scholars. Laser surface texturing
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Experimental analysis of vibration and noise characteristics of helical gears with nano-lubricant additives Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-12 Kai Xu, Ying Xiao, Xudong Cheng
Purpose The purpose of this study is to investigate the effects of nanoadditive lubricants on the vibration and noise characteristics of helical gears compared with conventional lubricants. The experiment aims to analyze whether nanoadditive lubricants can effectively reduce gear vibration and noise under different speeds and loads. It also analyzes the sensitivity of the vibration reduction to load
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Test and analysis of friction torque of double-row angular contact ball bearing under vacuum environment Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-10 Biqing Ye, Kebiao Zhang, Qiang Zuo, Li Zhang, Xiaohang Shan
Purpose The purpose of this paper is to test and analyze the friction torque of double-row angular contact ball bearings under vacuum or ordinary pressure environment, horizontal or upright installation mode, and different rotational speeds, and to provide theoretical bases for the development of aerospace equipment. Design/methodology/approach The experiments were carried out to investigate the effects
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Study of machining performance for electrochemical grinding of difficult-to-cut alloy U71Mn Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-10 Zhaozhi Li, Changfu Zhang, Hairong Zhang, Haihui Liu, Zhao Zhu, Liucheng Wang
Purpose This study aims to apply an electrochemical grinding (ECG) technology to improve the material removal rate (MRR) under the premise of certain surface roughness in machining U71Mn alloy. Design/methodology/approach The effects of machining parameters (electrolyte type, grinding wheel granularity, applied voltage, grinding wheel speed and machining time) on the MRR and surface roughness are investigated
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Study on the prediction of high-speed rotary lip seal wear in aero-engine based on heat-fluid-solid coupling Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-10 Jian Wei, YuXi Xue, Jing Tian, Fei Guo
Purpose This paper aims to investigate the effect of frictional heat on the wear of high-speed rotary lip seals in engines. Design/methodology/approach In this research paper, the authors focus on the high-speed rotating lip seal of aircraft engines. Using the hybrid lubrication theory, a thermal-fluid-solid coupled numerical simulation model is established to investigate the influence of parameters
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Study on surface properties of coated WC-Co alloy based on laser reduction process Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-05 Shucai Yang, Dawei Wang, Zhanjun Xiao
Purpose The purpose is to explore the improvement mechanism of coating and laser micro-texture on the surface properties of cemented carbide, so as to give full play to the technical advantages of both and improve the overall surface properties of the material. Design/methodology/approach The surface hardness of the coating was measured by a microhardness tester, the surface element composition of
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Influence of manufacturing surface topography on torque and load bearing capacity of hydro-viscous drive clutch under mixed lubrication stage Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2024-01-01 Shi Chen, Zhiyong Han, Qiang Zeng, Bing Wang, Liming Wang, Liuyang Guo, Yimin Shao
Purpose Hydro-viscous drive (HVD) clutches are widely used in equipment requiring soft start, such as fans and pumps, to transmit torque and adjust speed by changing the gap distance between friction pairs. This paper aims to propose a novel two-parameter evaluation method for HVD during the mixed lubrication stage. The objective is to develop an effective model that establishes the relationship between
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Stability analysis of partial journal bearings lubricated with micropolar fluid Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-29 Sanyam Sharma, Rajiv Verma
Purpose This study aims to investigate the stability performance of partial journal bearings of 120° and 180° partial angles with micropolar lubricant. Design/methodology/approach To investigate the stability characteristics of partial journal bearing, a MATLAB source code is written. To solve the Reynolds’ equation, the finite element method is used. Stability performances of 120° and 180° partial
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Deformation mechanism and dimension optimization methods of PTFE oil seals for shafts in a wide temperature range cycle Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-26 Yangtao Xing, Fugang Zhai, Shengnan Li, Peng Gui
Purpose This paper aims to study the deformation mechanism of polytetrafluoroethylene (PTFE) oil seal under a wide temperature range cycle. Design/methodology/approach This study categorizes the oil seal operation into three states: assembly, heating-up and cooling. The deformation equation for the oil seal is developed for each state, considering the continuity between them. The investigation of the
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Effect of textured parameters on tribological properties of hydrodynamic journal bearing Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-21 Yazhou Mao, Daqing Li, Lilin Li, Jingyang Zheng
Purpose This study aims to improve the tribological properties of hydrodynamic journal bearing via surface texture, as well as the wear and antifriction mechanisms of textured bearing were represented. It provides a design direction for solving the tribological problem of rotor-bearing system. Design/methodology/approach In this paper, the variation of surface texture parameters (e.g. texture diameter
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Investigation of rail damage considering impact at a welded joint under wet condition Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-21 Zhaoyang Wang, Bing Wu, Jiaqing Huang, Yuqi Yang, Guangwen Xiao
Purpose The purpose of this study is to develop a transient wheel–rail rolling contact model to primarily investigate the rail damage under wet condition when the train passes through the welded joints. Design/methodology/approach The impact force induced by welded joints is obtained through vehicle–track coupling dynamics. The normal and tangential wheel–rail contact pressures were solved by elastohydrodynamic
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Study on the influence of non-Gaussian honing surface on contact and flow characteristics Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-14 Yihu Tang, Li Huang, Xianghui Meng
Purpose The contact and lubrication performances, which were previously estimated assuming a Gaussian surface, are insufficient due to the non-Gaussian surface characteristics of the honing liner. The purpose of this study is to analyze the liner honing surface and examine its effects on the contact and flow performance. Design/methodology/approach The fast Fourier transform (FFT) method was used to
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Tribological glazing evolution of fixed abrasive pad under different polishing solution conditions Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-12 Changliu Tian, Yabo Wu, Minghua Pang, Zhankui Wang
Purpose This study aims to clarify the influence mechanism of polishing solution type on the glazing evolution of fixed abrasive pad under different interfacial pressure conditions. Design/methodology/approach The tribological experiments were carried out on the friction and wear machinery with W3-5 diamond fixed abrasive pad and quartz glass workpiece under three polishing solution types of five pressure
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Influence of V doping on the microstructure, chemical stability, mechanical and tribological properties of MoS2 coatings Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-06 Xiaolong Lu, Xudong Sui, Xiao Zhang, Zhen Yan, Junying Hao
Purpose This study aims to investigate the effect of V doping on the microstructure, chemical stability, mechanical and vacuum tribological behavior of sputtered MoS2 coatings. Design/methodology/approach The MoS2-V coatings are fabricated via tuning V target current by magnetron sputtering technique. The structural characteristic and elemental content of the coatings are measured by field emission
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Study on life distribution and prediction method of flexible graphite composite reinforced gasket Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-12-01 Yunhao Zhang, Chunlei Shao, Jing Kong, Junwei Zhou, Jianfeng Zhou
Purpose This paper aims to prevent gasket sealing failure in engineering, accurately predict gasket life, extend system life and improve sealing reliability. The accelerated life test method of flexible graphite composite–reinforced gaskets is established, the life distribution law of flexible graphite composite–reinforced gaskets is revealed, and the life prediction method of flexible graphite composite–reinforced
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Dynamic behavior of hydrostatic squeeze film dampers fed through four capillary restrictors with micropolar lubricant Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-28 Aboubakeur Benariba, Ahmed Bouzidane, Hicham Aboshighiba, Mark Thomas
Purpose The purpose of this research is to study the dynamic behavior of hydrostatic squeeze film dampers made of four hydrostatic pads, fed through four capillary restrictors with micropolar lubricant. Design/methodology/approach The modified version of Reynolds equation is solved numerically by the finite differences and the Gauss–Seidel methods to determine the pressure field generated on the hydrostatic
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Tribological responses of steels to different surface films generated in oil lubricants Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-22 Shoufan Cao, Zhang Xu, Yi Liang, Stefano Mischler
Purpose The aim of this study is to experimentally analyze the friction and wear responses of different steels to different surface films generated in oil-lubricated tribological contacts. Design/methodology/approach Tribological experiments were conducted using a 100Cr6 bearing ball sliding against a V155 carbon steel disk and 316L stainless steel disk, respectively. Lubricants with additives known
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Tribological performance of maintenance-free Cu-Sn-Ni-MoS2 composites over a wide temperature range Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-20 Yingxiang Zhao, Junde Guo, Xiaoni Yan, Shan Du, Min Gong, Biao Sun, Junwen Shi, Wen Deng
Purpose The purpose of this paper is to investigate the friction and wear mechanisms in copper-based self-lubricating composites with MoS2 as the lubricating phase, which provides a theoretical basis for subsequent research on high-performance copper-based self-lubricating materials. Design/methodology/approach Friction tests were performed at a speed of 100 r/min, a load of 10 N, a friction radius
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Influence of floating ring elastic deformation on ring equilibrium and minimum film thickness for a hydrodynamic/hydrostatic floating ring bearing Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-16 Shuai Yang, Junxing Hou, Xiaodong An, Shuanghui Xi
Purpose The floating ring generates elastic deformation as the film pressure for high-speed floating ring bearings (FRBs). The purpose of this study is to investigate the influence of ring elastic deformation on the performance of a hydrodynamic/hydrostatic FRB, including floating ring equilibrium and minimum film thickness. Design/methodology/approach The finite element method and finite difference
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Mechanical seal friction condition monitoring based on bispectral characteristics Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-14 Haocheng Bi, Muming Hao, Baojie Ren, Sun Xinhui, Tianzhao Li, Kailiang Song
Purpose The purpose of this paper is to investigate the monitoring of the friction condition of mechanical seals. Design/methodology/approach Acoustic emission signals from the friction of the seal end face were obtained, and their bispectral characteristics were extracted. The variation of non-Gaussian information with the degree of friction was investigated, and by combining bispectral characteristics
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Effect of rail profile wear on vehicle operation performance in high-speed line Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-14 Yayun Qi, Shuyu Li, Zhaowei Chen, Ruian Wang
Purpose With the continuous increase in the operating speed of high-speed trains, the wear and tear of rails on high-speed lines has also gradually deteriorated. At present, the phenomenon of asymmetric wear of rails in high-speed lines is relatively serious. This paper aims to analyze the effect of three typical rail profile wear on vehicle operation performance. Design/methodology/approach To solve
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Research of operation mode of high-speed trains on the effect of rail wear evolution law Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-14 Yayun Qi, Ruian Wang, Xiaolu Cui, Hutang Sang, Wenhui Mao
Purpose With the increased speed and mileage of high-speed lines, the problem of rail wear is increasing. In actual operation, a large number of abnormal wear phenomena occur on both vehicles and rails during fixed line operation; therefore, the purpose of the study is to explored the rail wear for a variety of vehicles running in mixed operation. Design/methodology/approach This paper used the universal
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Study on contact and vibration characteristics of composite cylindrical roller bearings Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-14 Qiang Bian, Xiangyun Zhang, Bowen Jiao, Guang Zeng, Chunjiang Zhao
Purpose The purpose of this paper is to establish a dynamic analysis model of composite cylindrical roller bearings, investigate the effects of different working conditions on the kinematic characteristics of composite bearings and compare the differences between them and solid roller bearings. Design/methodology/approach This paper establishes a dynamic analysis model for composite cylindrical roller
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Mercaptobenzothiazole functionalized ionic liquids as additive in lithium complex grease: rheological and tribological performances Ind. Lubr. Tribol. (IF 1.6) Pub Date : 2023-11-14 Huimin Yang, Chunlin Ye, Yi Li, Songwei Zhang
Purpose This study aims to probe the applicability of 2-mercaptobenzothiazole (MBT) functionalized ionic liquids (ILs) as additives in lithium complex grease (LCG) by researching the corrosion inhibiting, rheological and tribological performances. Design/methodology/approach Electrochemical tests such as electrochemical impedance spectroscopy and potentiodynamic polarization curves were used on Gamry