A Study of the Torsional Vibration of a 4-Cylinder Diesel Engine Crankshaft

2018 ◽  
pp. 383-392
Author(s):  
T. R. Lin ◽  
X. W. Zhang
Keyword(s):  
Diesel Engine ◽  
Torsional 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.

Torsional-Vibration Action Research on the Diesel Engine Crankshaft

2011 ◽  
Vol 199-200 ◽  
pp. 769-772 ◽  
Author(s):  
Xiao Qing Tian ◽  
Shi Ying Liu ◽  
Guo Dong Ding
Keyword(s):  
Diesel Engine ◽  
New Product Development ◽  
Torsional Vibration ◽  
Vibration Amplitude ◽  
3D Model ◽  
New Product ◽  
Engine Design ◽  
Vibration Action ◽  
Set Up ◽  
Engine Crankshaft

Abuse conditions of torsion and vibration occurred on crankshaft should be eliminated or diminished during the engine design process. 3D model of the crankshaft is set up by means of the simplified crankshaft system, using the concentrated quality method. FEA software was used for analyzing the different vibration amplitude orders. Two models with absorber and without absorber were compared and tested. The results of torsional vibration amplitudes-speed and so on are benefit to the new product development for eliminating the potential mechanical harm.

The torsional vibration simulation of the diesel engine crankshaft system based on multi-body dynamic model

2021 ◽  
pp. 146441932110202
Author(s):  
Mengsheng Wang ◽  
Nengqi Xiao ◽  
Minghui Fan
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Silicone Oil ◽  
Engineering Application ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Three Dimensional Model ◽  
Body Dynamics ◽  
Multi Body ◽  
Engine Crankshaft

In order to analyze the torsional vibration of the crankshaft system, a three-dimensional model of the crankshaft system is established, consisted of the piston, connected rod, crank shaft, flywheel and silicone oil damper. Use by multi-body dynamics simulation software ADAMS, created the multi-body dynamics model of the multiple degrees of freedom consisting of rigid hybrid engine system, to do the torsional vibration response simulation, analysis of the torsional vibration on the crankshaft. Through the torsional vibration test of the diesel engine crankshaft system, the accuracy of the simulation calculation results have been verified. This simulation result has higher accuracy, and this calculation method has certain engineering application value.

Diesel engine crankshaft journal bearings failures: Case study

2014 ◽  
Vol 44 ◽  
pp. 217-228 ◽  
Author(s):  
Aleksandar Vencl ◽  
Aleksandar Rac
Keyword(s):  
Diesel Engine ◽  
Journal Bearings ◽  
Crankshaft Journal ◽  
Engine Crankshaft

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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