An Investigation Into Axial and Bending Vibration Characteristics of a Diesel Engine Crankshaft

1983 ◽  
Vol 74 (2) ◽  
pp. 659-659
Author(s):  
J.‐ P. B. Thome
Keyword(s):  
Diesel Engine ◽  
Vibration Characteristics ◽  
Bending Vibration ◽  
Engine Crankshaft

Free Modal Experiment and Analysis of 4105 Diesel Engine Crankshaft Torsional-Bending Coupling Vibration

2013 ◽  
Vol 753-755 ◽  
pp. 1804-1811 ◽  
Author(s):  
Xiao Hua Li ◽  
Bei Shen ◽  
Yi Xi Cai ◽  
Kai Zhang
Keyword(s):  
Diesel Engine ◽  
Free Vibration ◽  
Torsional Vibration ◽  
Bending Vibration ◽  
Coupling Vibration ◽  
Vibration Parameters ◽  
Engine Crankshaft

In order to research the principle of crankshaft horizontal-bending vibration, free modal experiments of 4105 diesel engine crankshaft vibration was designed and done. Vibration parameters of free vibration, torsional vibration, vertical-bending vibration and horizontal-bending vibration were obtained respectively through different measurements points setting and motivation techniques. Through analysis of frequencies and models, a conclusion was drawn:the torsional vibration was just coupling with the horizontal-bending vibration.

A study on diesel engine crankshaft bearing failure analysis with consideration of bearing lubrication

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Qi Liu ◽  
Baiqi Huo ◽  
Yunsheng Liu ◽  
Junchao Zhu
Keyword(s):  
Diesel Engine ◽  
Failure Mechanism ◽  
Working Condition ◽  
Mixed Lubrication ◽  
Bearing Failure ◽  
Content Type ◽  
Lubrication Performance ◽  
Lubrication Characteristics ◽  
The Relationship ◽  
Engine Crankshaft

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.

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