scholarly journals An Example of Fatigue Failure in a Diesel Engine Crankshaft

1988 ◽  
Vol 37 (415) ◽  
pp. 371-377 ◽  
Author(s):  
Susumu MITANI
Keyword(s):  
Diesel Engine ◽  
Fatigue Failure ◽  
Engine Crankshaft

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.

Calculation Error Analysis on the Strain Fatigue Life Predication Formula of Manson-Coffinn and Damage Stain Model

2011 ◽  
Vol 197-198 ◽  
pp. 1599-1603
Author(s):  
Zhen Wei Wang ◽  
Ping An Du ◽  
Ya Ting Yu
Keyword(s):  
Fatigue Life ◽  
Error Analysis ◽  
Fatigue Failure ◽  
High Speed ◽  
Production Cost ◽  
Calculation Error ◽  
Mechanical Components ◽  
Strain Model ◽  
Engine Crankshaft

Mechanical components are subjected heavy alternate load in industries, such as engine crankshaft, wheel axle, etc. The fatigue failure happens after a long work loading, which affects the production cost, safe and time. So the fatigue life predication is fundamental for the mechanical components design. Especially, it is very important for heavy, high-speed machinery. In this paper, both main fatigue life predication formulas are introduced briefly, including Manson-Coffinn formula and Damage strain model. Then, shortages of above life predication formulas are pointed out, and coefficients are explained in detail. Further calculation error analysis is conducted on the basis of experiments on 16 materials. Results show that above life predication formulas lack calculation accuracy. Finally, it is pointed out that coefficients of fatigue life predication formulas are dependent of material performance. So it is unreliable that coefficients are constants for Manson-Coffin and Damage strain model.

scholarly journals Microstructure and fatigue fracture mechanism for a heavy-duty truck diesel engine crankshaft

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
Karim Alilakbari ◽  
Mohammad Imanparast ◽  
Reza Masoudi Nejad
Keyword(s):  
Diesel Engine ◽  
Fatigue Fracture ◽  
Fracture Mechanism ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Engine Crankshaft ◽  
Fatigue Fracture Mechanism

The Shell Molding Process Study for Mass Production of Single-Cylinder Diesel Engine Crankshaft

2010 ◽  
Vol 44-47 ◽  
pp. 284-288 ◽  
Author(s):  
Jiang Liu
Keyword(s):  
Diesel Engine ◽  
Ductile Iron ◽  
Pressure Head ◽  
Molding Process ◽  
Single Cylinder ◽  
Iron Castings ◽  
Transmission Part ◽  
Sector Plate ◽  
Engine Crankshaft ◽  
Casting Production

Crankshaft is a key transmission part in single-cylinder diesel engine, but its mass casting production is a problem. Based on the traditional shell molding process of ductile iron castings, this study did lots of techniques optimization for the crankshaft castings of single-cylinder diesel engine. Through increasing the multi-block or a combination of chill iron at sector-plate and upper spindle neck, increasing the pressure head of blind risers and the cross section of sprue, improving the fill compaction of iron pills, and other improvements, produces qualified ductile iron crankshaft castings without or almost without the shrinkage and other casting defects.

scholarly journals Rotational dynamics of piston diesel engine crankshaft with deactivated cylinders at idle

2019 ◽  
Vol 632 ◽  
pp. 012040
Author(s):  
S N Krivtsov ◽  
T I Krivtsova ◽  
A S Grebennikov
Keyword(s):  
Diesel Engine ◽  
Rotational Dynamics ◽  
Engine Crankshaft

Study on the Field Dynamic Balance of Diesel Engine Crankshaft

2013 ◽  
Vol 307 ◽  
pp. 299-303
Author(s):  
Shi Xun Jiang ◽  
Shi Hai Zhang ◽  
Zhi Min Yu
Keyword(s):  
Diesel Engine ◽  
Dynamic Balance ◽  
Least Square Method ◽  
Least Square ◽  
Vibration Monitoring ◽  
Influence Coefficient ◽  
Balance System ◽  
Influence Coefficient Method ◽  
Field Dynamic ◽  
Engine Crankshaft

Abstract：Based on the actual situations of diesel engines, significance of dynamic balance for marine diesel engine crankshaft system is discussed and as well vibration monitoring and field dynamic balance system for diesel engine crankshaft system is constructed. The least square method is applied to fit fundamental frequency vibration signals of crankshaft system and the field dynamic balance strategy is designed on the basis of the influence coefficient method. The feasibility of the dynamic balance system is tested through experiments in the paper.

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