Abstract
To reveal nonlinear dynamic rules of low viscosity fluid-lubricated tilting-pad journal bearings (TPJBs), the effects of design parameters on journal center orbits and dynamic minimum film thicknesses of water-lubricated TPJBs with and without static loads are investigated. The hydrodynamic bearing force used in the nonlinear dynamic analysis is an approximate analytical solution including the turbulence effect. The results reveal the methods for vibration suppression and load capacity improvement and give an optimal pivot offset and clearance ratio that can maximize the minimum film thickness. The results also show that four-pad TPJBs with loads between pads are preferred due to good dynamic performance and load capacity. This study would provide some guidance for nonlinear design of low viscosity fluid-lubricated TPJBs under dynamic loads.
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This work is supported by National Basic Research Program of China (Grant No. 2015CB057303) and National Natural Science Foundation of China (Grant No. 51775412).
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Yingze JIN. He received his bachelor degree in industrial design in 2014 from Zhengzhou University, Zhengzhou, China. After then, he was a Ph.D. student in mechanical engineering at the Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an, China. His research interests include hydrodynamic bearings and rotor dynamics.
Xiaoyang YUAN. He received his M.S. and Ph.D. degrees in mechanical engineering from Xi’an Jiaotong University, Xi’an, China, in 1985 and 1994, respectively. He is currently a professor in the Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University. His research areas cover superconducting magnetic technology, modern design and control of electromechanical system, lubrication theory, and dynamics of rotor-bearing-seal system.
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Jin, Y., Chen, F., Xu, J. et al. Nonlinear dynamic analysis of low viscosity fluid-lubricated tilting-pad journal bearing for different design parameters. Friction 8, 930–944 (2020). https://doi.org/10.1007/s40544-019-0310-6
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DOI: https://doi.org/10.1007/s40544-019-0310-6