Review
Engineering, Mechanical
Suman K. Mandal, Biplab Bhattacharjee, Nabarun Biswas, Kishan Choudhuri, Prasun Chakraborti
Summary: Journal or sliding bearings are widely used in engineering applications for their simple design and complex operation theory. The associated research and development have made reasonable progress in this area.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
G. H. G. van der Meer, F. Quinci, W. Litwin, M. Wodtke, R. A. J. van Ostayen
Summary: The study investigates the application of a modified MR fluid in lubrication performance using a journal bearing test bench. It is found that applying a local magnetic field can significantly reduce the transition speed of the bearing when lubricated with MR fluid, with only a minimal increase in friction. The lubricating performance of the MR fluid is compared to a reference oil.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Chemical
Arun Bangotra, Sanjay Sharma
Summary: This paper presents the static performance analysis of journal bearing with full and partial surface waviness. The effect of surface waviness is considered by modifying the Reynolds equation with the film thickness equation and solved using the finite element method. The study investigates the bearing load capacity, friction coefficient, and other performance parameters under eccentricity ratios ranging from 0.2 to 0.8. Results show that the maximum performance is achieved in the circumferential direction of the full and pressure-increasing region at a high eccentricity ratio.
LUBRICATION SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Vivek Bhardwaj
Summary: This study reports the improvement in performance behaviors of non-Newtonian fluid lubricated journal bearings by employing a rectangular pocket. The investigation found that the pocketed bearing yields significantly reduced coefficient of friction and higher load carrying capacity compared to the non-pocketed bearing. Additionally, the performance of the pocketed bearing improves with the increase in the power law index.
ENGINEERING RESEARCH EXPRESS
(2021)
Article
Engineering, Mechanical
Arun Bangotra, Sanjay Sharma
Summary: This study investigates the impact of surface waviness and nanoparticles on the static performance parameters of hydrodynamic journal bearings. The results show that surface waviness enhances load capacity and reduces friction coefficient, while the addition of nanoparticles improves lubricant viscosity and steady-state parameters of the bearings. The addition of nanoparticles can greatly increase the performance of hydrodynamic journal bearings.
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2022)
Article
Engineering, Mechanical
Nilesh D. Hingawe, Skylab P. Bhore
Summary: This paper investigates the influence of texture geometrical parameters on the tribological performance of meso scale air journal bearing. Through numerical simulations and optimization, it is found that textured air bearings have higher load carrying capacity and lower friction coefficient compared to plain air bearings.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2021)
Article
Engineering, Mechanical
Dragan Milcic, Amir Alsammarraie, Milos Madic, Vladislav Krstic, Miodrag Milcic
Summary: This study experimentally investigated the friction behavior of a tin-babbitt alloy journal bearing under hydrodynamic lubrication conditions using artificial neural network models. The well-trained neural network models can accurately predict the friction coefficient dependence on radial load and speed.
STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Minghui Yang, Hong Lu, Xinbao Zhang, Meng Duan, Liu Bao, Bowen Wang, Wan Wu
Summary: The waviness of the journal and bearing bush surfaces can have different effects on the hydrodynamic journal bearing system. The profile of the surfaces near the attitude angle plays a significant role in determining the performance of the bearing system.
Article
Engineering, Mechanical
Huaiyu Zuo, Song Xue, Tao Hong, Guanying Xing, Jiacheng Han, Jinlong Ma, Run Hu, Xiaobing Luo
Summary: The flow mechanism of a novel centrifugal micro hydrodynamic axial-thrust bearing is analyzed through numerical simulations and experiments in this study. The effects of various bearing properties on its performance are explored and explained. The results indicate that the load capacity increases with inlet-suction flow rate and decreases with rotational speed. Additionally, the bearing exhibits optimal stiffness and anti-abrasion properties at a thickness of 0.3 mm.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Automation & Control Systems
Nada Abdelmoneim Bassiouny, Mohammad Al-Makky, Helmi Youssef
Summary: The purpose of this research paper is to investigate the influence of input working parameters on the quality of friction-drilled holes and formed threads in order to improve their quality. Experiments were conducted to study the hardness macro- and microstructure of formed threads, which had not been researched extensively before. A tension test was performed to compare the performance of form tapped threads with conventionally cut threads. The results showed that the t/d ratio was the most significant factor affecting cylindricity error and collar height.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
He Li, Junkai Niu
Summary: This paper investigates the impact of texture on the tribological performance of journal bearings operating under starvation lubrication conditions. The P-theta model with mass conservation boundary conditions accurately predicts the oil film distribution in the full oil film/starvation region of the textured bearing. The study discusses the effects of different levels of starvation lubrication on parameters such as eccentricity, attitude angle, full film area, and friction coefficient in textured bearings. The results show that the severity of the texture's effect on bearing performance varies with starvation levels and that texturing can improve the bearing's operating performance, increase load carrying capacity, reduce friction coefficient, and enhance safety.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Mechanics
Chandra B. Khatri, Saurabh K. Yadav, Gananath D. Thakre, Arvind K. Rajput
Summary: This paper investigates the application of a vein bionic texture inspired by a peepal leaf pattern to the surface of a hydrodynamic journal bearing, with the optimization done by a bio-inspired genetic algorithm. The study found that the use of the bionic texture alone increased the stability parameter by 13.08% and reduced the friction torque by 21.17%. However, the use of the GA-optimized vein-bionic texture resulted in even greater improvements, with the stability parameter increasing by up to 18.24% and the friction torque being reduced by up to 46.66%. The findings of this study are valuable for researchers in rotor dynamics seeking to stabilize systems with the use of GA-optimized vein-bionic textured journal bearings.
Article
Engineering, Mechanical
Pravez Khan, Anil Dhanola, H. C. Garg
Summary: The study investigated and compared the performance parameters of rigid and flexible journal bearings using non-Newtonian nanolubricants. Results showed that using nanolubricants significantly increased load-carrying capacity, maximum pressure, and friction force, with these parameters increasing with the power law index. The study also found that elastic deformation had a minimal effect on performance parameters.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
F. Quinci, W. Litwin, M. Wodtke, R. van den Nieuwendijk
Summary: The study investigates the performance of a journal bearing lubricated with magnetorheological fluid using Finite Element Modelling (FEM) and experiments. Thicker fluid films, beneficial pressure distribution, and higher friction losses are observed in the bearing with magnetorheological fluid compared to oil lubrication, under all operating conditions.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Jaroslav Zapomel, Petr Ferfecki
Summary: The paper presents a new design concept for a hydrodynamic bearing lubricated by composite magnetic fluids. The mathematical model and computational procedures were developed to study the behavior and performance of the bearing. The research shows that increasing the magnetic induction in the bearing gap improves the bearing load capacity and centers the journal. The advantage of this bearing is its semiactive operation principle.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Huiyi Yang, Yang Xu, Chao Xu
Summary: This study focuses on the impact of dry friction interfaces on the dynamics of jointed structures, particularly on the statistics of contact pressure distribution. Through experimental and simulation analysis, it is found that surface roughness and contact load have significant effects on contact area, contact stiffness, and mean contact pressure.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Guanglan Hu, Houfu Dai
Summary: The effect of metal coating on the machinability of cubic silicon carbide was investigated using molecular dynamics simulation. The results showed that the type of coating has a significant impact on cutting force, surface morphology, stress, and tool wear. Among the three metals studied, Cu coating had the greatest impact on improving cutting performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yunfan Liu, Guozheng Ma, Lina Zhu, Cuihong Han, Zhen Li, Bin Zhang, Haichao Zhao, Haidou Wang, Shuying Chen
Summary: The service performance of coated self-lubricating spherical plain bearings can be improved by applying self-lubricating coatings, especially double-sided coatings. The presence of a large-area and complete mixed friction transfer film on the contact surfaces can cause a signal downstage before the signal mutation stage.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yakup Artun, C. Oktay Azeloglu, Gokhan Taylan
Summary: This article investigates the tribological properties of polymer journal bearings, particularly focusing on radial journal bearings made from UHMWPE and POM materials with different surface qualities. The study examines the performance of these bearings under varying load and speed conditions, and analyzes the relationship between material and surface roughness in tribological performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
