Article
Chemistry, Multidisciplinary
Yanfeng Han, Ting Tang, Guo Xiang, Hang Jia
Summary: This study investigates the impact of propeller shaft deflection on the fluid-solid-heat coupling performance of water lubricated rubber stern bearing, and develops a model to validate the findings. Results suggest that under heavy load conditions, the deflection of the stern shaft should be taken into account in the analysis of FSH performance of the JWR system.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Mechanical
Qilin Liu, Wu Ouyang, Ruiqing Li, Yong Jin, Tao He
Summary: This paper aims to study the demand of underwater vehicles for water-lubricated stern bearings with low noise, low vibration, high load capacity, and long service life. A series of experiments was conducted to analyze the lubrication and vibration characteristics of three test bearings with different bushing materials and structures. The results indicate that under extreme working conditions, the modified polyurethane bearing shows the best comprehensive performance. Specific pressure and environment temperature significantly influence the bearing performance, while flow rate has limited effect. The research provides important references for the material and structure design and performance testing of water-lubricated stern bearings.
Article
Engineering, Mechanical
Tao He, Zhongliang Xie, Xin Tao, Kang Yang, Jian Jiao, Minli Huang, Wensheng Ma
Summary: This study proposes a water-lubricated stern bearing with self-adaptation capacity for load equalization and vibration reduction. By using elastic elements and damping alloy, the bearing can improve the service life and reduce vibration response.
Article
Engineering, Mechanical
Qilin Liu, Wu Ouyang, Qichao Cheng, Jinjun Li, Qizhi Cheng, Ruiqing Li
Summary: This paper investigates the lubrication and dynamic characteristics of water-lubricated stern bearing under service conditions. It proposes a test scheme to analyze the pressure distribution and spatial shaft position of the bearing. The experiment reveals the pressure bias and bidirectional shaft inclination phenomenon, and a dynamic model considering bidirectional shaft inclination and lining deformation is established. The study explores the influences of various factors on lubrication and dynamic characteristics and provides guidance for the design and optimization of such bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
M. Wodtke, W. Litwin
Summary: The research focuses on thermal phenomena related to the operation of a water-lubricated stern tube bearing with axial grooves. Experimental tests showed that the intensity of forced axial flow significantly affects the bush temperature. Numerical simulations revealed that restricted axial flow leads to backflow of water through the grooves, resulting in a higher backflow temperature than the supply temperature and an increase in bearing bush temperature.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Physics, Applied
Xingfei Xie, Qingwen Dai, Wei Huang, Xiaolei Wang
Summary: This study develops a ferrofluid-lubricated thrust bearing with an air cushion that provides much higher static supporting force compared to traditional ferrofluid rings. Dynamic experiments show that the rotor speed has only a minor effect on the supporting force, indicating potential use in precise positioning or low-friction systems.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Mechanical
Xincong Zhou, Fuming Kuang, Jian Huang, Xueshen Liu, Konstantinos Gryllias
Summary: Frictional vibration in water-lubricated rubber bearings can severely impact the reliability and performance of underwater vehicles. The hardness, thickness, and concavo-convexity of the rubber layer significantly affect the damping properties of the bearing system, with hardness being the most important factor, followed by thickness and surface radius.
TRIBOLOGY TRANSACTIONS
(2021)
Article
Engineering, Mechanical
Wu Ouyang, Qilong Yan, Junxin Kuang, Yong Jin, Weicai Peng
Summary: By introducing the squeeze film damper technology, the design of ship water-lubricated stern bearing successfully balances high load-carrying capacity and low natural frequency. Experimental results indicate that WDSB shows significant vibration reduction effect compared to CWSB.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Engineering, Mechanical
Shengdong Zhang, Zhilin Long, Xiuying Yang
Summary: This research proposes a magnetorheological fluid-lubricated rubber stern bearing test ring to study the effects of temperature, magnetic field strength, and eccentricity ratio on lubrication performance. By solving the Reynolds equation with the finite difference method and successive over-relaxation method, it is found that bearing capacity can be improved and friction coefficient reduced by adjusting these parameters. The results of this study may offer valuable theoretical and experimental support for the design of rubber stern bearings lubricated with this type of magnetorheological fluid.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Review
Engineering, Mechanical
Zhongliang Xie, Jian Jiao, Kang Yang, Hao Zhang
Summary: This paper provides a detailed summary of water-lubricated bearings in five typical aspects: lubrication regime, fluid-solid interaction (FSI), thermal effect, tribological behaviors, and vibration-noise performances. It extracts and acquires the influencing factors, judgement criteria, and lubrication mechanism of the lubrication regime. The methodology and parameters influencing temperature rise are summarized. The generation mechanism of tribological behaviors and vibration & noise is obtained. The paper systematically combs and summarizes the theories and methods of water-lubricated bearings, pointing out the existing problems and urgent technologies that need to be solved. The findings can serve as a distinct theoretical and methodological reference for further investigation on water-lubricated bearings.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Mathematics, Applied
Zhongliang Xie, Kang Yang, Jian Jiao, Weiyang Qin, Tao Yang, Chao Fu, Anbo Ming
Summary: This paper clarifies the mechanism of the dynamic characteristics of the water-lubricated bearing-rotor coupling system at different operating stages. Dynamic models of the system are developed to investigate the influences of different operating modules on the dynamic characteristics. The effects of different speeds, different loads, and different impacts are analyzed. Experimental results verify the validity of the newly developed models, providing theoretical foundations for the optimum design of such bearing-rotor systems.
Article
Engineering, Mechanical
Zhongliang Xie, Yun Zhang, Jinzhu Zhou, Weidong Zhu
Summary: This paper aims to reveal the micro interface lubrication regimes of water lubricated bearings through computational fluid dynamic analysis. The influences of operating conditions and dimensionless structural parameters on fluid features are explored, and experimental data verifies the correctness of the lubrication model. The research results lay a solid foundation for further optimal design of such bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Ammar Athmania, Mustapha Lahmar, Benyebka Bou-Said, Bachir Bouchehit, John Tichy
Summary: This paper presents a numerical simulation of porous journal bearing behavior considering the interaction between fluid film and poroelastic matrix, as well as the non-Newtonian behavior of a nano-lubricant. The study found that the load capacity of the bearing increases with the characteristic size and concentration of nanoparticles, while the attitude angle, leakage flow rate, and coefficient of friction decrease. On the other hand, the permeability decreases the hydrodynamic pressure, load capacity, and leakage flow rate; but increases the attitude angle and coefficient of friction.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Marine
Chang-Gang Lin, Ming-Song Zou, Hai-Cheng Zhang, Li-Bo Qi, Shu-Xiao Liu
Summary: The study established a mechanism for friction-induced vibration and noise in water-lubricated stern bearings, finding that changes in various parameters can significantly affect the stability and nonlinear response of the system, providing important guidance for low noise design.
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING
(2021)
Article
Engineering, Mechanical
Krishnkant Sahu, Satish C. Sharma, Adesh Kumar Tomar
Summary: This paper proposes a study on the slot-entry 'hybrid conical journal bearing system' (HCJBs) with the slot restrictor as a compensating device. The effects of different zonal arrangements of textured surfaces and smart behavior of magnetorheological fluid (MRF) on the HCJBs are analyzed. Mathematical modeling of the modified Reynolds equation is done using the Finite element method and the Gauss-Seidel method. Numerical simulation shows that the application of textured surfaces and MR fluid improves the performance of the hybrid conical bearing system in terms of fluid film thickness, stiffness, and stability.
TRIBOLOGY INTERNATIONAL
(2023)
