国外文献 > 1.轴承 > 3. 材料与制造 > 材料性能
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| 标 题： |
A study on diesel engine crankshaft bearing failure analysis with consideration of bearing lubrication
考虑轴承润滑的柴油机曲轴轴承失效分析研究 |
| 作 者： |
Liu, Qi
Huo, Baiqi
Liu, Yunsheng
Zhu, Junchao |
| 关键词： |
Crankshaft bearing [曲轴轴承]
Mixed lubrication [ 混合润滑]
Lubrication failure [ 润滑失效]
Asperity load [ 刚性载荷]
DYNAMIC CHARACTERISTICS [ 动态特性]
SURFACE-ROUGHNESS [ 表面粗糙度]
PERFORMANCE [ 表现]
MISALIGNMENT [ 错位]
DEFORMATION [ 变形]
PRESSURE [ 压力]
SHAFT [ 轴] |
| 出版年： |
2022 |
| 期刊名： |
Industrial Lubrication and Tribology
工业润滑与摩擦学 |
| 年卷期： |
2022, vol.74, no.1 |
| 摘 要： |
Purpose The edge of diesel engine crankshaft main bearing is more likely to fail in its real working condition. This paper aims to study the bearing failure mechanism by finding the relationship between bearing lubrication characteristics and its working condition. Design/methodology/approach This work builds the mixed lubrication model of crankshaft bearing to analyze the cause of bearing abnormal wear, and the finite difference method was used to solving the average Reynolds equation. During the analysis, journal misaligned angle, external load and roughness are considered. Findings The result shows that the wear of the diesel engine crankshaft bearing happens in engine startup phase and the bottom of the bearing are more prone to be excessively worn. Under the influence of journal misalignment, bearing asperity contact load and speed range of mixed lubrication will increase markedly. The edge of the bearing will be excessively worn. The effect of misalignment on bearing lubrication performance varies under different shaft rotation speed. Originality/value The former research studies on crankshaft bearing either just focused on its lubrication characteristics or interested in its failure types (wear, adhere, cavitation). This paper studies the relationship between bearing failure mechanism and lubrication performance.
目的：在实际工作条件下，柴油机曲轴主轴承边缘更容易发生失效。本文旨在通过研究轴承润滑特性与工作条件之间的关系，探讨轴承的失效机制。设计/方法：本研究建立了曲轴轴承的混合润滑模型，以分析轴承异常磨损的原因，并采用有限差分法求解平均雷诺方程。分析过程中考虑了轴颈偏心角、外载荷和表面粗糙度等因素。结果表明，柴油机曲轴轴承的磨损主要发生在发动机启动阶段，且轴承底部更易出现过度磨损。在轴颈偏心的影响下，轴承的粗糙接触载荷和混合润滑速度范围将显著增大，导致轴承边缘过度磨损。此外，偏心对轴承润滑性能的影响会随转速不同而有所变化。原创性/价值：以往关于曲轴轴承的研究要么仅关注其润滑特性，要么关注其失效类型（磨损、粘附、空蚀）。本文研究了轴承失效机制与润滑性能之间的关系。 |
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