...Vishal G. Salunkhe; S. M. Khot; Nitesh P. Yelve; T. Jagadeesha; R. G. Desavale Bearing clearance is a common issue in mechanical systems due to unavoidable assembly errors, leading to weak fault features that are challenging to detect. This study introduces a novel diagnostic technique...

...J. C. Atwal; P. Ganai Rigid bore aerodynamic journal bearings are widely used in precision machinery, high-speed small turbomachinery, etc., to support and guide the motion of shafts. Due to several starts/stops of the machinery, these bearings may wear out in the service, and subsequently...

...Chaozhen Yang; Xueshen Liu; Zhangkai Huang; Ting Wang; Meixia Chen A novel friction model for water-lubricated bearings under boundary lubrication conditions is proposed. The effects of speed, load, surface roughness, and material properties on the friction coefficient are examined. The model...

...MD Shujan Ali; Dongil Shin; Alan Palazzolo Super-critical CO 2 (SCO 2 ) power cycles offer significant advantages in terms of thermal efficiency, cost-effectiveness, and environmental benefits. However, the successful implementation of these cycles depends on the design and analysis of bearings...

...Rajesh Joshi; Gurmitsingh Bassan Tapered roller bearings with hollow rollers offer improved roller stiffness, enhanced speeds, and lower running temperatures due to better lubrication. Designing precise tapered roller bearings with hollow rollers is crucial. This study introduces a novel design...

...Mitul T. Solanki; Dipak P. Vakharia The fatigue life of rolling bearings is a critical factor in their selection and application, driving ongoing research aimed at enhancing their performance. Among the solutions explored, the introduction of hollow rollers has been noted for their lighter weight...

...Qing Liu; Mingdi Wu; Ruihuan Ge; Weipei He; Ziyu Cheng As the demand for ultrahigh-speed bearings grows, hybrid gas-magnetic bearings (HGMBs) have emerged as a research focus due to the ability to integrate the merits of active magnetic bearings (AMBs) and gas bearings (GBs). However, HGMBs face...

... motors generate complex shaft voltages and bearing currents, leading to bearing electrical erosion. This study proposes a new method for detecting high-frequency (HF) circulating current and electric discharge machining (EDM) current signals in bearings for electric motors. The proposed method utilizes...

...Yang Liu; Yangzhou She; Wenqi Li To analyze the working mechanism of the floating sleeve bearing of the cone bit, the life of the floating sleeve bearing was tested. The experimental results show that adhesive wear will form on the bearing surface with the increase in temperature, which is the main...

...Robert L. Jackson; Sudip Saha; Jack R. Janik Rolling element bearings are an integral component of electric vehicles, supporting radial and axial loads in powertrain components such as electric motor shafts and wheel bearings. Fast-switching inverters enable precise, variable control of motor...

...Ge Xu; Shuyun Jiang; Chibin Zhang; Xiaohui Lin The hydrodynamic herringbone groove journal bearing (HGJB) performs exceptionally well at high speeds but is limited by a low load-carrying capacity, largely due to the lubrication characteristics of water. To address this issue, a hybrid water...

...Collier Fais; Muhammad Ali; Isaiah Yasko This study presents the design and development of a new hydrodynamic thrust bearing test rig with a novel hydrodynamic pressure feedback bearing alignment control system. The bearing alignment system maintains an even distribution of thrust load across...

...Hengrui Du; Jing Wang; Xinqing Wang In ball bearings without a cage, adjacent balls exhibit a zero-entrainment velocity (ZEV) contact condition, which is worse than typical pure rolling or rolling–sliding contact, and the contact between adjacent balls under periodic loading is notably more...

...Minghui Guo; Guojun Zhang; Haidong Hu; Zhuxin Tian; Youmin Rong; Yu Huang; Congyi Wu The temperature rises of the oil film in hydrostatic bearings at high speed lead to a reduction in load capacity, accuracy, and stability. In this paper, a superhydrophobic/oleophobic surface with a micro-bulge...

...Pedro Herrera; Christopher Goyne; Robert Rockwell The stiffness and damping coefficients of fluid film bearings play a key role in predicting levels of vibration and stability margins in high-performance industrial rotating machinery. However, variability in the coefficients calculated by numerical...

...Samruddhi Patel; Sanjay Patel The empirical and mathematical approach is presented in the present paper for multiple distributed and localized flaws analyses in the shaft-rotor-bearing arrangement. These flaws in the combination of the inner raceway, outer raceway, and roller are measured...

...Peng Liang; Xingyang Li; Feng Guo; Xiaohan Zhang; Fulin Jiang When sand enters the gap between the shaft and water-lubricated bearing, it will nick surfaces of shaft and bearing bush, and the scratch will appear. The variations of static and transient performance with the number and depth...

...Zhixiang Zhao; Xi Wang; Yu Hou Roller skew in roller bearings can cause heat generation in roller–race and roller–rib contacts, thus reducing bearing life. It is significant to obtain the roller skew angle in situ for guiding the bearing design and adjusting the operating conditions. In this study...

...Shuaijun Ma; Yanjing Yin; Linbo Zhu; Ke Yan; Yongsheng Zhu As a crucial component, rolling bearings directly determine the reliability of rotating equipment. However, current dynamic models for predicting the bearing performance either ignore the velocity and stress dispersion at the ball/raceway...

...Subrata Barman; Kritesh Kumar Gupta; Subrata Kushari; Sudip Dey This investigation presents the deterministic and stochastic responses of the journal bearing with a two-layered porous bush. Pressure equations in the porous layers and modified Reynolds equations in the clearance region are governed...