Article
Engineering, Mechanical
Xiaohui Lin, Shun Wang, Shuyun Jiang, Shaowen Zhang
Summary: This study investigates the influence of interface effect and cavitation bubble distribution on the dynamic characteristics of high-speed water-lubricated spiral groove thrust bearings. A turbulent cavitating flow lubrication model is established based on two-phase fluid and population balance equation of bubbles. The stiffness and damping coefficients of the bearings are calculated using perturbation pressure equations. Experimental results validate the theoretical model. The findings suggest that the turbulent effect has a greater impact on the dynamic characteristics of the bearings compared to the cavitation effect.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Guangwu Zhou, Renpan Li, Daxin Liao, Wanyou Yang, Ping Zhong
Summary: In order to meet the urgent requirements of shaftless rim-driven thrusters for low and medium speed, high load capacity, and wear-resistant water-lubricated bearings, this paper conducted research on the lubrication structure design of water-lubricated spiral groove rubber thrust bearings (SGRTBs). A mixed lubrication analysis technique was proposed, considering the effect of surface roughness, and the optimization design of the spiral groove structure parameters was achieved, addressing the mixed lubrication issue of typical spiral surface contact.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Shuyun Jiang, Pengfei Liu, Xiaohui Lin
Summary: This article aims to establish a theoretical model for water-lubricated textured spiral groove thrust bearing and analyze its static characteristics. The verified tests indicate that texture effects can reduce the friction torque of the bearing, and there exists an optimal texture parameter for maximum load-carrying capacity. Furthermore, the cavitation effect increases the load-carrying capacity of the bearing.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Narendra Kumar, Satish C. Sharma
Summary: This study investigates the effects of shear-thinning and piezoviscous lubricant on the behavior of spiral grooved hybrid annular thrust pad bearing configurations, and reveals that the characteristics of grooves and lubricant have significant impact on lubrication performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2023)
Article
Engineering, Mechanical
Linfeng Ge, Chao Wang, Ke Yan, Yongsheng Zhu, Jun Hong
Summary: By adding groove structures to the non-contact area of bearing inner ring surface, the lubrication performance of bearing can be enhanced, leading to a lower temperature rise. The design and optimization of groove structure can improve the lubrication effect of bearing during high-speed rotation.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Chemical
Hara Prakash Mishra, Suraj Kumar Behera
Summary: This paper presents the design and numerical optimization of an oil-lubricated spiral grooved thrust bearing (SGTB) for high-speed and axial loading conditions. A numerical model is developed using the nonlinear incompressible Reynold's equation and solved using the finite volume method (FVM) to determine the static characteristics of the bearing. The influence of groove parameters on the bearing's static characteristics is investigated, and it is found that the designed SGTB can operate at high-speed conditions and withstand high axial loads. The characteristic data sets obtained from the numerical analysis are trained using an artificial neural network (ANN) and the optimum bearing parameters are determined through an adaptive neuro-fuzzy interface system (ANFIS) surface plot.
LUBRICATION SCIENCE
(2023)
Article
Engineering, Mechanical
Shaowen Zhang, Shuyun Jiang
Summary: This technical brief investigates the static characteristics of double-pad inwardly pumping and outwardly pumping water-lubricated spiral-groove thrust bearings (SGTB) through the establishment of a lubrication model and experimental verification. The results suggest that the outwardly pumping version can outperform the inwardly pumping version under certain conditions, offering better axial load capacity and resistance to tilting.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Mechanics
Beichen Tian, Linmin Li, Yang Meng, Biao Huang
Summary: The multiscale effect of cavitation is studied using a proposed model, which successfully simulates the behavior and evolution of bubbles under different cavitation patterns. The results show the influence of turbulence and cavitation number on bubble characteristics.
Article
Engineering, Mechanical
Nguyen LaTray, Daejong Kim
Summary: The integration of foil bearing technology into high-speed oil-free machines has been slow due to the low load-carrying capacity of the foil thrust bearing. This study introduces a novel thrust foil bearing with taper-flat configuration and pocket grooves on the top foil, which acts as a secondary pressure boosting mechanism. Parametric study suggests that the static performance of the bearing is most sensitive to the angular span of the pocket grooves.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Jianping Wang, Haifeng Ran, Peng Dai, Shuping Yan, Xingjia Yao, Fengtao Wang, Guizhong Zuo
Summary: This study aims to investigate the influence of shaft misalignment on the performance of herringbone groove thrust bearings. Computational fluid dynamics was used to analyze the flow of the liquid film. The results show that herringbone grooves create micro hydrodynamic effects, and the effects of shaft misalignment on lubrication and sealing performance can be observed.
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2023)
Article
Chemistry, Physical
Reo Miwa, Norifumi Miyanaga, Jun Tomioka
Summary: This study investigated the unique hysteresis phenomena in the hydrodynamic lubrication properties of dimpled thrust bearings. The dimpled specimen showed improved load-carrying capacity and reduced frictional torque compared to the dimple-free specimen. The size of cavitation bubbles within the dimples strongly influenced this phenomenon.
Article
Engineering, Mechanical
Pavel Novotny, Martin Jonak, Jiri Vacula
Summary: Thrust bearings are crucial components in rotating machines, requiring optimal performance under various operating conditions. An optimization method based on genetic algorithms can design bearings with exceptional performance in extreme conditions. Bearings designed using this approach reduced friction losses by 30% and mechanical losses of the entire turbocharger by 20%.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
J. C. Atwal, R. K. Pandey
Summary: This paper explores the performance parameters of a sector-shaped pad thrust bearing lubricated with water using a new pocket design, considering the effects of turbulence and cavitation. The study investigates the effects of new pocket attributes and compares the performance behaviors achieved with the new pocketed pad bearing with plain pad and rectangular pocketed bearing.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Mechanics
Yuansen Song, Shaoxian Bai, Jing Yang, Junjie Chen
Summary: This paper presents a compressible cavitation model to study the effect of fluid cavitation intensity on zero-leakage flow. The results show that cavitation has a negative impact on sealing performances, but the groove's configuration and working conditions can control the cavitation intensity. It is also important to consider the formation of a circumferential continuous pressure ring for judging strict zero leakage.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Engineering, Mechanical
Ruichao Liu, Lilong Jing, Xianghui Meng, Bugao Lyu
Summary: The study showed that the bearings of the hermetic rotary compressor work under high ambient pressure, and taking into account the deformation of the crankshaft can more accurately estimate the wear of the thrust bearing. Furthermore, high ambient pressure is the leading cause of thrust bearing wear.
TRIBOLOGY INTERNATIONAL
(2021)