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CSME 2023/12
Volume 44 No.6
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565-572
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Study on The Journal Center Orbit of Micro-Polar Lubricated Offset-Halves Journal Bearings
Lili Wanga, Longchao Lia, Jingdong Duana and Yunlong Baoa
aCollege of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, China 266590.
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Abstract:
During the actual operation, bearings are inevitably subjected to various loads, and the journal center orbit shows many lubrication patterns, the transient performance of the journal center orbit of micro-polar lubricated offset-halves journal bearings is studied. A nonlinear journal center orbit calculation model is established, the Eulerian method is applied to calculate the journal center orbit, and the journal center orbit and bearing lubrication performance under step load and rectangular load are studied. The results show that the action time of rectangular load is limited, and the journal center converges to the original equilibrium position after the load disappears, while the journal center converges to the new equilibrium position when the step load is applied. When the bearing is subjected to transient load, the oil film thickness and pressure will produce large change, and the oil film thickness and pressure will return to the previous state as the load disappears. The oil film pressure of the upper and lower bushes of the offset-halves journal bearing is equal in values and opposite in direction without load. The pressure of the lower bush increases and the pressure of the upper bush decreases while loading.
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Keywords: micropolar lubrication, offset-halves journal bearing, nonlinear journal center orbit, step and rectangular load.
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©
2023
CSME , ISSN 0257-9731
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