The constrained modal and transient stress analysis of diesel engine crankshaft

2017 ◽  
Author(s):  
Heng Zhang ◽  
Zheng-ming Xiao ◽  
Li-rong Wu
Keyword(s):  
Diesel Engine ◽  
Stress Analysis ◽  
Transient Stress ◽  
Engine Crankshaft

Stress analysis of a lifeboat diesel engine crankshaft under impact load

2015 ◽  
Author(s):  
S.C. Su ◽  
H.T. Lei ◽  
H.H. He ◽  
X.M. Wang ◽  
Y. Hou ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Stress Analysis ◽  
Impact Load ◽  
Engine Crankshaft

Strength Calculation Analysis of Diesel Engine Linkage Based on Three-Dimensional Contact Finite Element Method

2011 ◽  
Vol 148-149 ◽  
pp. 1202-1208 ◽  
Author(s):  
Gui Xin Wang ◽  
Xiao Bo Li ◽  
Li Jun Guo ◽  
Jun Yan Ma
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Diesel Engine ◽  
Stress Analysis ◽  
Maximum Stress ◽  
Three Dimensional ◽  
Connecting Rod ◽  
Transient Stress ◽  
Calculation Analysis ◽  
Element Method

Adopting a three-dimensional contact finite element method, with complex connecting rod group assembled body model of computation, the fatigue strength of the connecting rod of a certain type of diesel engine was verified. A transient stress analysis was conducted on the connecting rod. Compared with the connecting rod static stretching and compression test, the three-dimensional contact finite element method, which was used to analyze the strength of the connecting rod subassembly, was feasible. Based on the three-dimensional contact finite element method, the connecting rod transient stress analysis results showed that the maximum stress of the connecting rod did not occur under the highest pressure of the cylinder, and the dynamic stress value was less than the static stress value.

Strength Calculation Analysis of Diesel Engine Linkage Based on Contact Finite Element Method and Experimental Study

2012 ◽  
Vol 569 ◽  
pp. 539-545
Author(s):  
Gui Xin Wang ◽  
Li Jun Guo ◽  
Wen Fu Sun ◽  
Jun Yan Ma
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Diesel Engine ◽  
Stress Analysis ◽  
Maximum Stress ◽  
Dynamic Stress ◽  
Connecting Rod ◽  
Transient Stress ◽  
Calculation Analysis ◽  
Element Method

Adopting the contact finite element method, with complex connecting rod group assembled body model of computation, the fatigue strength of the connecting rod of a certain type of diesel engine was verified. A transient stress analysis was conducted on the connecting rod. Compared with the connecting rod static stretching and compression test, the contact finite element method, which was used to analyze the strength of the connecting rod subassembly, was feasible. Based on the contact finite element method, the connecting rod transient stress analysis results showed that the maximum stress of the connecting rod did not occur under the highest pressure of the cylinder, and the dynamic stress value was greater than the static stress value.

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.

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.

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