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Transient Simulation and Cavitation Suppression During Friction Lubrication of Engine Connecting Rod Bearings
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Xiaoqing Yin1, Kangbo Yang2, Jingjing Xu1, Kexin Li1, Xiangning Du1, Yuqi Huang2
Transactions of CSICE | 2024, 42(1) : 87 - 96
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Transactions of CSICE | 2024, 42(1): 87-96
Transient Simulation and Cavitation Suppression During Friction Lubrication of Engine Connecting Rod Bearings
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Xiaoqing Yin1, Kangbo Yang2, Jingjing Xu1, Kexin Li1, Xiangning Du1, Yuqi Huang2
Affiliations
  • 1.State Key Laboratory of Engine Reliability，Weichai Power Company Limited，Weifang 261061，China
  • 2.Power Machinery & Vehicular Engineering Institute，Zhejiang University，Hangzhou 310027，China
doi: 10.16236/j.cnki.nrjxb.202401011
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The influence of different inlet conditions on the oil film cavitation phenomenon of connecting rod bearings of a heavy-duty diesel engine was explored through the dynamic boundary calculation. A method of slotting on the bearing bush was proposed to suppress the cavitation phenomenon during the bearing movement. The effects of the number，depth and form of grooves on the suppression of oil film cavitation were further analyzed. It is found that the increase in the number and depth of grooves can improve the effect of oil grooves to inhibit cavitation，but the degree of improvement of the inhibition effect decreases accordingly. If cavitation occurs and collapses frequently，it will be more likely to destroy the bearing bush surface and cause obvious cavitation erosion compared with the stable cavitation state. Compared with the full-groove model，the half-groove model has a higher suppression effect，which can reduce the maximum gas phase volume fraction of the oil film from 0.94(ungrooved)to 0.39. Combined with the reliability requirements of the overall structure of the bearing bush，selecting a half-ring single groove with an appropriate groove depth can effectively suppress the cavitation of the oil film during the bearing movement.

diesel engine  /  connecting rod bearings  /  cavitation phenomenon  /  oil sump
Xiaoqing Yin, Kangbo Yang, Jingjing Xu, Kexin Li, Xiangning Du, Yuqi Huang. Transient Simulation and Cavitation Suppression During Friction Lubrication of Engine Connecting Rod Bearings[J]. Transactions of CSICE, 2024 , 42 (1) : 87 -96 . DOI: 10.16236/j.cnki.nrjxb.202401011
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Year 2024 volume 42 Issue 1
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Article Info
doi: 10.16236/j.cnki.nrjxb.202401011
  • Receive Date：2022-11-19
  • Online Date：2025-12-11
Article Data
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History
  • Received：2022-11-19
  • Revised：2023-05-24
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Affiliations
    1.State Key Laboratory of Engine Reliability，Weichai Power Company Limited，Weifang 261061，China
    2.Power Machinery & Vehicular Engineering Institute，Zhejiang University，Hangzhou 310027，China
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https://castjournals.cast.org.cn/joweb/nrjxb/EN/10.16236/j.cnki.nrjxb.202401011
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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