Effects of wall slip on the dynamic characteristics of water-lubricated bearing considering rough contact

Purpose This paper aims to identify the role of the wall slip on the dynamic characteristics of the multi-groove water-lubricated bearing considering rough contact, including stiffness and damping coefficients of the water film and contact stiffness coefficient of the asperity contact. Design/methodology/approach The modified perturbed average Reynolds equations with the wall slip are derived, and the calculated perturbed hydrodynamic pressures are integrated to obtain the stiffness and damping coefficients of the water film. The elastic-plastic contact model of Kogut and Etsion is used to determine the contact stiffness coefficient. Findings Numerical results reveal that the wall slip has the more significant impact on the water film stiffness coefficients compared with the damping and contact stiffness coefficients. When the slip angle lies in a reasonable range, the lubrication performance can be effectively improved, especially in the mixed lubrication condition. In addition, it is worth emphasizing that the abrupt change of the water film stiffness coefficients occurs at the region II (pressure zone) in this study. Originality/value The influence mechanism of the wall slip on the dynamic characteristics of the water-lubricated bearing considering rough contact is first revealed.

[1]  H. Jia,et al.  Study on time-varying mixed lubrication performance of microgroove journal-thrust coupled bearing under water lubrication , 2022, Industrial Lubrication and Tribology.

[2]  Fei Li,et al.  Optimization of boundary slip region on bearing sliders to improve tribological performance , 2022, Tribology International.

[3]  M. Fillon,et al.  Thermohydrodynamic behavior of partially coated plain journal bearings with/without considering wall slip , 2021, Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology.

[4]  Jiaxu Wang,et al.  Hydrodynamic lubrication analysis of water-lubricated bearings with partial microgroove considering wall slip , 2021 .

[5]  Guo Xiang,et al.  Numerical study on the dynamic characteristics of water-lubricated rubber bearing under asperity contact , 2020, Industrial Lubrication and Tribology.

[6]  M. Fillon,et al.  Optimization performance of plain journal bearings with partial wall slip , 2020 .

[7]  Qin Hongling,et al.  Experimental analysis on friction-induced vibration of water-lubricated bearings in a submarine propulsion system , 2020 .

[8]  C. Sima,et al.  Friction-induced vibration and noise of marine stern tube bearings considering perturbations of the stochastic rough surface , 2019, Tribology International.

[9]  Shuyun Jiang,et al.  Investigations of the static and dynamic characteristics of water-lubricated hydrodynamic journal bearing considering turbulent, thermohydrodynamic and misaligned effects , 2019, Tribology International.

[10]  Jinwu Xu,et al.  Investigation into the Normal Contact Stiffness of Rough Surface in Line Contact Mixed Elastohydrodynamic Lubrication , 2018 .

[11]  Ming Feng,et al.  Anti-shock characteristics of water lubricated bearing for fuel cell vehicle air compressor , 2017 .

[12]  Shuyun Jiang,et al.  Dynamics of a motorized spindle supported on water-lubricated bearings , 2017 .

[13]  Zhushi Rao,et al.  The lubrication performance of water lubricated bearing with consideration of wall slip and inertial force , 2017 .

[14]  A. Kietzig,et al.  Internal and External Flow over Laser-Textured Superhydrophobic Polytetrafluoroethylene (PTFE). , 2016, ACS applied materials & interfaces.

[15]  Shibing Liu,et al.  A new model of water-lubricated rubber bearings for vibration analysis of flexible multistage rotor systems , 2015 .

[16]  Gao Gengyuan,et al.  Determination of stiffness coefficients of hydrodynamic water-lubricated plain journal bearings , 2015 .

[17]  Zhengying Wei,et al.  Effect of large-area texture/slip surface on journal bearing considering cavitation , 2015 .

[18]  Meng Hua,et al.  Boundary slip surface design for high speed water lubricated journal bearings , 2014 .

[19]  K. Breuer,et al.  APPARENT SLIP FLOWS IN HYDROPHILIC AND HYDROPHOBIC MICROCHANNELS , 2003 .

[20]  Izhak Etsion,et al.  A Static Friction Model for Elastic-Plastic Contacting Rough Surfaces , 2004 .