4.7 Article

Investigation on the lubrication characteristics of low-viscosity lubricated micro-grooved bearings considering turbulence and misalignment

Related references

Note: Only part of the references are listed.
Article Engineering, Mechanical

Misalignment and Surface Irregularities Effect in MR Fluid Journal Bearing

Krishnkant Sahu et al.

Summary: Misalignment affects the operation of the journal bearing system, and smart lubricants can enhance the performance of fluid film bearings. The study finds that journal misalignment reduces the fluid film thickness, increases the fluid film damping coefficient, and frictional torque.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2022)

Article Engineering, Mechanical

Numerical Analysis of the Transient Wear and Lubrication Behaviors of Misaligned Journal Bearings Caused by Linear Shaft Misalignment

Tianyou Yang et al.

Summary: This study investigates the effects of misaligned journal caused by linear shaft misalignment on transient wear and mixed lubrication performances using a numerical model. The results show that the wear depth, film pressure, and elastic deformation of the bearing are asymmetric along the axial direction and their peak values shift toward the back end when considering the journal misalignment. The maximum wear depth, fluid pressure, contact pressure, and bearing's elastic deformation under the misaligned journal condition are significantly larger than those under the aligned journal condition.

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME (2022)

Article Engineering, Mechanical

Theoretical and experimental exploration into the fluid structure coupling dynamic behaviors towards water-lubricated bearing with axial asymmetric grooves

Zhongliang Xie et al.

Summary: This study investigates the fluid structure interaction (FSI) dynamic behaviors of water-lubricated bearings with axial asymmetric grooves. Revised FSI models considering cavitation and turbulent effects are proposed. The simulations are consistent with existing literature and experimental data, confirming the accuracy of the model. The effects of groove types and locations on dynamic behaviors are systematically explored, showing that the separation effects of the local asymmetric grooves coupled with the rotation effects enhance the hydrodynamic effects, leading to increased maximum pressure values and load carrying capacity (LCC).

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2022)

Article Mechanics

Transient mixed-lubrication analysis of low-viscosity lubricated bearings under impact load with consideration of turbulence

Fangrui Lv et al.

Summary: This study proposes a transient mixed-lubrication model considering turbulence to investigate the dynamic characteristics of mixed-lubricated bearings. The effects of turbulence, surface roughness, and impact load direction on transient lubrication are analyzed based on a derived transient Reynolds equation and the journal's dynamic equation.

PHYSICS OF FLUIDS (2022)

Article Engineering, Mechanical

On the tribo-dynamic behaviors during start-up of water lubricated bearing considering imperfect journal

Shouan Chen et al.

Summary: This paper investigates the impact of imperfect journal on the tribo-dynamic behavior of water-lubricated bearings during start-up. The numerical model shows that the shape error of the journal can affect the performance of the bearing, but within a reasonable range, it can also improve the tribological performance.

TRIBOLOGY INTERNATIONAL (2022)

Article Engineering, Multidisciplinary

Research on the lubricated characteristics of journal bearing based on finite element method and mixed method

Wenjie Zhou et al.

Summary: This paper presents a new numerical method, including finite element method and mixed method, to study the lubricated characteristics of journal bearing. The calculated results obtained by this method are validated and further research is conducted to investigate the effects of various parameters on the bearing performance. The stiffness and damping coefficients of the bearing are also calculated. The theoretical model and calculated results provide useful references for the design of journal bearing and rotor coupled system.

AIN SHAMS ENGINEERING JOURNAL (2022)

Article Mechanics

Effects of wear and shaft-shape error defects on the tribo-dynamic response of water-lubricated bearings under propeller disturbance

Jianlin Cai et al.

Summary: This study investigates the effects of wear and shaft-shape error defects on the tribo-dynamic responses of water-lubricated bearings under nonlinear propeller disturbance. The results show that the nonlinear disturbance significantly affects the dynamic behavior of the bearings, and reasonable wear parameters can improve the lubrication performance.

PHYSICS OF FLUIDS (2022)

Article Engineering, Mechanical

Coupling analysis of turbulent and mixed lubrication of water-lubricated rubber bearings

Jinsheng Qiao et al.

Summary: This study establishes a turbulent mixed lubrication model of water lubricated rubber bearings (WLRBs), revealing the effect mechanism of turbulence in these bearings. The rationality of the model is verified through experiments, and optimal axial misalignment and radius clearance that can maximize the turbulent force are determined.

TRIBOLOGY INTERNATIONAL (2022)

Article Engineering, Mechanical

Optimization transient wear and contact performances of water-lubricated bearings under fluid-solid-thermal coupling condition using profile modification

Guo Xiang et al.

Summary: A surface profile modification method is proposed to improve the WAC performance of water-lubricated bearings under fluid-solid-thermal coupling condition. Numerical calculations demonstrate the effectiveness of the method in decreasing wear depth and asperity contact force. The optimal modification width and depth are determined, and parametric studies reveal the method's effectiveness is closely related to design parameters and operating conditions. Generally, a large modification depth is not recommended.
Article Mechanics

Mathematical modeling for nonlinear dynamic mixed friction behaviors of novel coupled bearing lubricated with low-viscosity fluid

Jianlin Cai et al.

Summary: This paper develops a mathematical model to investigate the nonlinear dynamic mixed friction behaviors of a novel coupled bearing lubricated with low-viscosity fluid. The study reveals the effect of structural parameters on the friction behavior and verifies the model through numerical simulations.

PHYSICS OF FLUIDS (2022)

Article Engineering, Mechanical

Influence of the mass conservation cavitation boundary on the tribo-dynamic responses of the micro-groove water-lubricated bearing

Jianlin Cai et al.

Summary: This study investigates the role of mass conservation boundary on the tribo-dynamic responses of micro-groove water-lubricated bearings under mixed lubrication. The simulation results show that cavitation can stabilize the bearing's movement and enhance the dynamic pressure effect of the micro-grooves. The analysis of rotational speed and micro-groove depth parameters confirms their significant influence on the cavitation zone and dynamic pressure effect of the bearings.

SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES (2022)

Article Mechanics

Thermohydrodynamic investigation for supercritical carbon dioxide high speed tilting pad bearings considering turbulence and real gas effect

Chunxiao Bi et al.

Summary: A global heat balance method for supercritical carbon dioxide (S-CO2) high speed tilting pad bearings was developed, taking into consideration the real gas effect, variable thermodynamic properties, and turbulence effect. The influence of the thermal effect on the static and dynamic characteristics of bearings is caused by changes in density, specific heat, and thermal expansion coefficient rather than viscosity, which is different from oil bearings. The study found that the influence of thermohydrodynamic lubrication on static characteristics of S-CO2 tilting pad bearings is more significant than on dynamic coefficients.

PHYSICS OF FLUIDS (2021)

Article Engineering, Mechanical

Theoretical and experimental investigation on the influences of misalignment on the lubrication performances and lubrication regimes transition of water lubricated bearing

Zhongliang Xie et al.

Summary: This paper investigates the influences of misalignment on the lubrication performances of water lubricated bearing, proposing a modified lubrication model. Results show that misalignment increases maximum pressure and shear stress, decreases minimum film thickness, reduces certain lubrication regions, ultimately deteriorating lubrication performances on the interface.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

Article Engineering, Mechanical

Theoretical and experimental exploration on the micro asperity contact load ratios and lubrication regimes transition for water-lubricated stern tube bearing

Zhongliang Xie et al.

Summary: The paper investigates the micro asperity contact load ratios and lubrication states of water-lubricated bearings. New coupled models are proposed to consider the micro-scale effects of asperity contact. The study establishes the relevance of load ratio with transition of lubrication regimes under various structural parameters and operating conditions, revealing the mechanism of regimes transition at the micro level. Experimental measurements verify the correctness of the revised model.

TRIBOLOGY INTERNATIONAL (2021)

Article Engineering, Mechanical

Study on MR fluid hybrid hole-entry spherical journal bearing with micro-grooves

Satish C. Sharma et al.

Summary: The study focuses on utilizing magneto-rheological fluid and micro-grooves to enhance the performance and stability of bearing systems, which is expected to assist in the design and analysis of bearing systems.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2021)

Article Mechanics

Effect of different turbulent lubrication models on the lubrication characteristics of water-lubricated rubber bearings at a high Reynolds number

Yuanying Du et al.

Summary: By using four different turbulent lubrication mathematical models, the lubrication characteristics of water-lubricated rubber bearings under high-Reynolds-number operating conditions were studied. The turbulent lubrication models showed higher bearing capacity and film pressure compared to laminar lubrication models, and the Aokihiro-Harada Masahiro turbulent lubrication theory was found to be more accurate. Additionally, non-linear and approximately linear increases in bearing capacity and maximum film pressure were observed with increasing eccentricity and rotational speed, while non-linear decreases and approximately linear increases were observed with increasing clearance ratio.

PHYSICS OF FLUIDS (2021)

Article Engineering, Mechanical

Modeling a Hydrodynamic Bearing With Provision for Misalignments and Textures

Chunxing Gu et al.

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME (2020)

Article Engineering, Mechanical

Thermal turbulent lubrication analysis of rough surface journal bearing with journal misalignment

Shaoyu Zhu et al.

TRIBOLOGY INTERNATIONAL (2020)

Article Engineering, Mechanical

Study on the tribo-dynamic performances of water-lubricated microgroove bearings during start-up

Guo Xiang et al.

TRIBOLOGY INTERNATIONAL (2020)

Article Engineering, Mechanical

Stochastic models for turbulent lubrication of bearing with rough surfaces

Shaoyu Zhu et al.

TRIBOLOGY INTERNATIONAL (2019)

Article Engineering, Mechanical

Effect of misalignment on the dynamic characteristic of MEMS gas bearing considering rarefaction effect

Liangliang Li et al.

TRIBOLOGY INTERNATIONAL (2019)

Article Engineering, Mechanical

Study on influencing factors of lubrication performance of water-lubricated micro-groove bearing

Jiayu Gong et al.

TRIBOLOGY INTERNATIONAL (2019)

Article Engineering, Mechanical

Mixed-lubrication analysis of misaligned bearing considering turbulence

Fangrui Lv et al.

TRIBOLOGY INTERNATIONAL (2018)

Article Engineering, Mechanical

Analysis of equivalent supporting point location and carrying capacity of misaligned journal bearing

Fangrui Lv et al.

TRIBOLOGY INTERNATIONAL (2017)

Review Engineering, Mechanical

Hydrodynamic lubrication of textured surfaces: A review of modeling techniques and key findings

Daniel Gropper et al.

TRIBOLOGY INTERNATIONAL (2016)

Article Engineering, Mechanical

Numerical analysis of plain journal bearing under hydrodynamic lubrication by water

Gengyuan Gao et al.

TRIBOLOGY INTERNATIONAL (2014)

Article Engineering, Mechanical

The impact of the cavitation model in the analysis of microtextured lubricated journal bearings

Roberto Ausas et al.

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME (2007)

Article Engineering, Mechanical

Combined thin-film and Navier-Stokes analysis in high Reynolds number lubrication

J Frêne et al.

TRIBOLOGY INTERNATIONAL (2006)

Article Engineering, Mechanical

Influence of journal misalignment caused by shaft deformation under rotational load on performance of journal bearing

J Sun et al.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY (2005)