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| Vibration Characteristics of Wet Cylinder Liner of Vehicle Diesel Engine |
| Received:August 02, 2019 Revised:August 29, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.11.002 |
| KeyWord:diesel engine cylinder liner vibration mode excitation force finite element analysis time-frequency conversion |
| Author | Institution |
| LU Chuan |
.School of Mechanical Engineering,Chengdu , China |
| LU Yao-hui |
.School of Mechanical Engineering,Chengdu , China ;Engineering Research Center of Advanced Driving Energy-saving Technology of Ministry of Education, Southwest Jiaotong University, Chengdu , China |
| WU Yu-wei |
.School of Mechanical Engineering,Chengdu , China |
| LI Zhan-ping |
.School of Mechanical Engineering,Chengdu , China |
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| Abstract: |
| Objective To study the main reasons for the cylinder liner failure through calculation and analysis of the vibration characteristics of the diesel engine wet cylinder liner, to improve the reliability of the diesel engine structure. Methods Based on the structural parameters of the cylinder liner of 16V280ZJ diesel engine, the finite element analysis model of cylinder liner was established by finite element method, and the modal analysis was carried out, including the free mode and the constrained mode. The inherent vibration characteristics of the cylinder liner were analyzed. Then, based on the performance parameters of the 16V280ZJ diesel engine, the gas force and the inertial force were calculated, and the alternating side pressure of the cylinder liner was calculated. The alternating side pressure spectrum was converted into a frequency domain spectrum by time-frequency conversion to analyze the excitation characteristics of the cylinder liner. Results The mode shape of the cylinder liner was mainly radial bending vibration, indicating that the radial stiffness was less than the axial stiffness. The frequency of the alternating side pressure experienced by the cylinder liner was lower than the natural frequency of the cylinder liner. Conclusion The wet cylinder liner of the diesel engine is not resonated by the lateral excitation force of the piston, and the radial rigidity of the cylinder liner is small, which causes cavitation of the cylinder liner after the excitation force is transmitted to the cooling water. |
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