Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing
Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing
复制标题
连杆轴承中实验膜厚测量与弹流动力学分析的比较
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
J. Frěne
中科院分区：
文献类型：
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作者：
H. Moreau;P. Maspeyrot;D. Bonneau;J. Frěne
摘要 本文介绍了动载连杆大端轴承油膜厚度的实验测量和理论计算。每个轴承使用四个涡流间隙传感器来测量油膜厚度并推断轴承轨迹。曲轴主轴承的实验数据很容易获得，但连杆轴承的控制比较困难，因为在旋转和往复运动的连杆上安装仪表很困难。该解决方案使用固定在活塞轴下方的机械连杆。弹流动力学模型考虑连杆弹性变形。计算过程采用有限元和Newton-Raphson方法进行数值分析。实验与理论对负载和曲轴转速的影响进行了比较。
Abstract This paper describes the experimental measurements and the theoretical calculations of oil-film thickness in a dynamically loaded connecting-rod big-end bearing. Four eddy current gap sensors for each bearing are used to measure the oil-film thickness and to deduce the bearing trajectories. Experimental data for crankshaft main bearings are easy to obtain but connecting-rod bearings are more difficult to control due to the difficulty of installing instrumentation on connecting-rods that are rotating and reciprocating. The solution uses a mechanical linkage fixed under the piston axis. The elastohydrodynamic model considers connecting-rod elastic deformations. The calculation process uses finite element and Newton-Raphson methods for the numerical analysis. Comparisons of both the load and crankshaft speed effects are made between experiment and the theory.