Failure Analysis of Early Fracture for Diesel Engine Cylinder Liner

2012 ◽  
Vol 461 ◽  
pp. 177-181
Author(s):  
Jun Gu ◽  
Yuan Qiang Xu ◽  
Jing Jing Zhou
Keyword(s):  
Diesel Engine ◽  
Failure Analysis ◽  
Early Time ◽  
Cylinder Liner ◽  
Acute Angle ◽  
Engine Cylinder ◽  
Regulatory Measures ◽  
Engine Cylinder Liner

This article, through the cylinder jacket break phenomenon which occurs to the diesel engine early time carries on the failure analysis, suggests that the cylinder jacket material ingredient control is lax, causes the cylinder jacket material brittleness to be oversized, the tool escape acute angle is the cylinder jacket break primary cause, and proposes corresponding regulatory measures prevent the cylinder jacket early tithe break.

scholarly journals Study on the Effect of Diaphragm Booster on the Pulsed Heat Transfer of Cooling System

2020 ◽  
Vol 6 (4) ◽  
pp. 214-222
Author(s):  
Y. Zhou ◽  
Z. Liu ◽  
A. Golyanin
Keyword(s):  
Heat Exchange ◽  
Diesel Engine ◽  
Cooling System ◽  
Cooling Water ◽  
Check Valve ◽  
Cylinder Liner ◽  
Circulation System ◽  
Engine Cylinder ◽  
Hydraulic Accumulator ◽  
Engine Cylinder Liner

This paper has developed a diesel engine cylinder liner and cooling water heat exchange enhancement device, including diesel engine cylinder liner, cylinder liner water cooler, hydraulic accumulator, check valve, diaphragm booster, centrifugal water pump, pulse valve and Conical tube. As well as the pulsating circulation system and booster system composed of equipment. The device heats the heat generated by the diesel engine cylinder liner in a pulsating circulation system through a cylinder circulator in a pulsating circulation system to exchange heat with the external low-temperature seawater. By controlling the opening and closing of the pulsating valve in the pulsating circulation system, fluid is generated in the pipe. Pulsing and hydraulically impacting the diaphragm booster connected near the pulsation valve pipeline, the fluid at the outlet of the diaphragm booster is subjected to hydraulic shock and circulates in a closed booster circuit connected to the diaphragm booster and passes through the cone during the flow. The shaped tube accelerates the fluid to return to the diaphragm supercharger, and the kinetic energy of the fluid is converted into the pressure in the pulsating heat exchange system by impacting the elastic diaphragm of the diaphragm supercharger, so that the pulsating speed is increased. The present invention is to increase the pulsating velocity of the diaphragm. Based on the design of the compressor drive, it improves energy efficiency, avoids the use of high-power water pumps, and saves equipment construction and daily operation.

Small Sample Competing Failure Model of Cylinder Liners in Diesel Engines

2013 ◽  
Vol 427-429 ◽  
pp. 124-128
Author(s):  
Qu Li Ma ◽  
Jian Jun Yang ◽  
Yi Liu
Keyword(s):  
Diesel Engine ◽  
Prediction Model ◽  
Cylinder Liner ◽  
Small Sample ◽  
Likelihood Method ◽  
Support Vector ◽  
Failure Model ◽  
Engine Cylinder ◽  
Quasi Maximum Likelihood ◽  
Engine Cylinder Liner

In order to deal with the small sample problem in practical reliability analysis of the diesel engine cylinder liner, the method and the steps of using support vector machine to build a regression prediction model to eventually develop the competing failure model of diesel engine cylinder liner are proposed. As proposed, more samples are generated by use of the regression prediction model and the quasi maximum likelihood method is used to separately estimate the occurring patterns of two failure models, including abrasion deterioration and pyrolysis. The scientificity and effectiveness of this method was demonstrated through calculation of examples and comparison of results.

Thermal-Structure Coupled Field Analysis of a Certain HPD Diesel Engine Cylinder Liner

2012 ◽  
Vol 433-440 ◽  
pp. 7425-7429 ◽  
Author(s):  
Jian Ming Lv ◽  
Guang Yao Ouyang ◽  
Ping Zhang
Keyword(s):  
Diesel Engine ◽  
Maximum Stress ◽  
Thermal Structure ◽  
Cylinder Liner ◽  
Field Analysis ◽  
Heat Transfer Theory ◽  
Engine Cylinder ◽  
Sequence Method ◽  
Coupled Loads ◽  
Engine Cylinder Liner

Based on heat transfer theory and thermal-structure coupled in sequence method of finite element, the stress and displacement distribution of a certain high power density diesel engine cylinder liner under the action of thermal-structure coupled loads was calculated. The results showed that the highest temperature field of cylinder liner appeared on the upper part of the cylinder liner inner surface. Furthermore, the maximum stress value and displacement value of cylinder liner were obtained, which will give a gist for designing and calibrating cylinder liner in practical.

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