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CSME 2020/12
Volume 41 No.6
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817-826
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Lubrication Analysis and Friction Loss Perdition of Main Bearings for Non-road Diesel Engines
Fen-Lian Huanga, Peng Wanga, Yu-Hua Bia, Qian-Fan Xina and Na Lia
aYunnan Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, China.
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Abstract:
Based on the Greenwood /Tripp asperity theory and extended Reynolds equation under mass-conserving boundary condition, the elastic-hydrodynamic (EHD) mixed lubrication model of the main bearings according to the flexible engine was developed. The finite element models were reduced by component mode synthesis (CMS) method, and the validation is achieved by comparison with measurements from modal test. Then the oil film thickness, oil film pressure and friction power of each bearing under different operation conditions was calculated, and the validation of friction power is achieved by comparison with results obtained from motoring test with part of components decoupled from the engine. Finally, the friction loss prediction model of main bearings was established based on response surface methodology, and the influence of parameters were analyzed systematically through regression analysis method. The results show that with the increase of engine speed and oil viscosity, the friction power of main bearings become higher, and the bearing clearance made great effects on the friction loss.
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Keywords: Main bearing; Elasto-hydrodynamic lubrication; Friction loss; Response surface methodology.
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©
2020
CSME , ISSN 0257-9731
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