Investigation on Dimples Distribution Angle in Laser Texturing of Cylinder–Piston Ring System

In this paper, the wear test was carried on with cylinder piston by the wear test device, receiving the results of the piston ring wear and abrasive characteristics by monitoring the wear process, the thesis analysis and put forward the nano-CaCO3 lubricating oil additive anti wear mechanism by the ferrography analysis technology, and provide the technical reference for the relevant measures to reduce wear and the friction, and provide reference value for further study on the related theories of reducing wear and reducing friction.

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Study on Experiment and Simulation for Laser Surface Micro Texturing on Cylinder Piston Ring Friction Pair

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1033-1034.1317 ◽

2014 ◽

Vol 1033-1034 ◽

pp. 1317-1320

Author(s):

Wei Gong ◽

Fei Dong ◽

Yun Peng Du ◽

Ji Lin Xiong

Keyword(s):

Numerical Simulation ◽

Laser Pulse ◽

Piston Ring ◽

Friction Pair ◽

Simulation Method ◽

Experimental Results ◽

Pulse Interval ◽

Numerical Simulation Method ◽

Cylinder Piston ◽

Micro Cavity

Regarding the cylinder piston ring friction pair system as the object , put forward a new numerical simulation method to study the thermal effect mechanism of single pulse interval laser micro texturing. By means of numerical simulation and experimental verification, analysis the variation of laser pulse frequency and laser power on the 45# steel surface micro cavity morphology. The simulation and experimental results show that along with the increase of laser pulse number, the depth of micro cavity increases, the recasting phenomenon of molten metal is obvious, and the machined surface quality decreases. At the same condition, the micro cavity depth simulation results and experimental results are basically the same trend; the maximum error is less than 8%, which proves the feasibility and validity of the numerical simulation method.

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Features of systems greasing of diesel engines MANB&W

Ship power plants ◽

10.31653/smf340.2020.144-151 ◽

2020 ◽

Vol 1 ◽

pp. 144-151

Author(s):

V.M. Bogach ◽

◽

J.M. Dovidenko ◽

I.M. Slobodianiuk ◽

Keyword(s):

Diesel Engine ◽

Diesel Engines ◽

High Speed ◽

Piston Ring ◽

Actual Problem ◽

Modern Methods ◽

Cylinder Piston ◽

Overall Performance ◽

Experimental Researches ◽

To Receive

The abstract The publication is devoted the decision of an actual problem increase efficiency operation of ship diesel engines by perfection processes greasing of cylinders. The analysis a condition of a question on an investigated problem is made and lacks systems greasing of diesel engines MAN-B&W are defined. Experimental researches on studying processes greasing of cylinders of ship engines that has allowed to receive representation about an overall performance these systems are spent. Modern methods researches, such as oscillograms and high-speed filming are thus used. Characteristics process greasing, and their interrelation with a design of greasing devices are defined. Influence geometrical parametres of channels system greasing on characteristics process the expiration of oil in the cylinder and finally on efficiency its use in the engine is experimentally confirmed. Keywords: ship diesel engine, greasing system, greasing channel, greasing process, cylinder, piston, a piston ring.

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Improving diagnostics of the cylinder-piston group by pneumatic testing

Traktory i sel'hozmashiny ◽

10.31992/0321-4443-2021-4-13-21 ◽

2021 ◽

Vol 1 (4) ◽

pp. 13-21

Author(s):

K.E. Grunin ◽

Keyword(s):

Piston Ring ◽

Statistical Data ◽

Experimental Studies ◽

Engine Operation ◽

Second Stage ◽

Piston Group ◽

Third Stage ◽

Cylinder Piston ◽

Three Stages ◽

Micrometer Size

The task of author’s research was to determine the emerging leaks when compressed air is sup-plied to the above-piston space under pressure of 4, 5 and 6 kgf / cm2, respectively. To obtain more reliable results, measurements of the leakage of the above-piston space by pneumatic testing should be performed three times. The deterioration of this tribo-coupling should be assessed by the average values of the obtained values. In order to identify the analytical relationships between the readings of the pneumotester and various types of cylinder malfunctions, it is necessary, to simulate during the experiment the malfunctions most often encountered during ordinary engine operation that affect the tightness of the combustion chamber. The planned experimental studies were carried out in strict accordance with the tasks and includ-ed three stages. The first stage included the collection and analysis of statistical data on the dependence of engine pneumatic testing indications on various types of cylinder-piston group (CPG) malfunctions during ordinary operation, as well as pneumatic testing of engine cylinders undergoing major repairs and their CPG micrometer size. At the second stage, an experiment to simulate malfunctions on an experimental setup and on a working engine, as well as to determine the influence on the readings of the pneumatic tester of the ratio of leaks in the “piston-ring-sleeve” interface was carried out. The third stage included the processing of statistical data, processing of the data obtained directly during the experiment with the introduced CPG malfunctions and the processing of the data obtained when determining the influence of the leakage ratio in the “piston-ring-sleeve” interface on the readings of the pneumatic tester.

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Application of Metal Self-Repairing Additives on Cylinder-Piston Ring Rubbing Pairs

Advanced Tribology ◽

10.1007/978-3-642-03653-8_32 ◽

2009 ◽

pp. 98-101

Author(s):

Lei Wang ◽

X. C. Zhou ◽

Q. Q. Li ◽

C. Q. Yuan ◽

X. P. Yan ◽

...

Keyword(s):

Piston Ring ◽

Cylinder Piston

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Investigation on the application of YAG laser texturing technology to the cylinder wall of auto engine

Industrial Lubrication and Tribology ◽

10.1108/ilt-12-2011-0109 ◽

2014 ◽

Vol 66 (3) ◽

pp. 387-392 ◽

Cited By ~ 8

Author(s):

Jian Zhan ◽

Mingjiang Yang

Keyword(s):

Wear Rate ◽

Piston Ring ◽

Discrete Distribution ◽

Cylinder Liner ◽

Cylinder Wall ◽

Laser Texturing ◽

Yag Laser ◽

Content Type ◽

The Coefficient Of Friction ◽

Lubrication Condition

Purpose – The purpose of this study was to develop a new approach using a pulse YAG laser with rational power density and pulse width to texture desired discrete distribution morphology on the cylinder wall. Design/methodology/approach – Variational rules of the effects of these three parameters were found by calculating the oil film on the cylinder/piston ring system. The experiment results were compared between laser texturing cylinders and conventional honing cylinders. Findings – It was found that the coefficient of friction and wear rate of laser texturing cylinders were reduced by 50 and 85.7 per cent, respectively, and the piston ring wear rate was decreased by 50 per cent under full lubrication condition. Under starved lubrication condition, the cylinder liner wear was reduced by 34.3 per cent. Originality/value – The effectiveness of which was determined by three control parameters: depth-to-diameter ratio, area density and distribution angle of the dimples.

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Effect of Cylinder Surface Treatment on Diesel Engine Performance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.199-200.689 ◽

2011 ◽

Vol 199-200 ◽

pp. 689-695 ◽

Cited By ~ 1

Author(s):

Zhi Wei Guo ◽

Cheng Qing Yuan ◽

Peng Liu ◽

Xin Ping Yan

Keyword(s):

Diesel Engine ◽

Surface Treatment ◽

Piston Ring ◽

Combustion Engine ◽

Engine Performance ◽

Cylinder Liner ◽

Cylinder Surface ◽

Comparison Analysis ◽

Cylinder Piston ◽

Engine Condition

The cylinder-piston ring pair is one of the most important rubbing pairs of the internal combustion engine. The current studies showed that the micro geometry of friction surface morphology has a great effect on the performance. In this study, the terminological system of cylinder liner - piston ring was regarded as the object. The surface of each cylinder was treated with some pits and grooves. Then, the cylinder-piston ring experiments were implemented using a tester. The comparison analysis of vibration signals from diesel engine condition body surface and tribiological properties between conventional cylinder and a variety of surface treatment of cylinder was conducted. The effects of cylinder surface on diesel engine performance were investigated and some conclusions were obtained and presented in the paper.

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Research of Numberical Solution on Kinetic and Tribological Coupled Model of Piston Systems

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.373-375.95 ◽

2013 ◽

Vol 373-375 ◽

pp. 95-98

Author(s):

Xiao Rong Zhou ◽

Yu Ling Zhang ◽

Gan Wei Cai

Keyword(s):

Piston Ring ◽

Numerical Solutions ◽

Dynamic Performance ◽

Coupled Model ◽

Cylinder Liner ◽

Coupling Model ◽

Ring System ◽

Calculation Process ◽

Piston System ◽

The Finite Difference Method

This paper establishs a coupled model on kinetic and tribological of cylinder liner-piston-piston ring system and takes the cylinder liner-piston system as an automatic control system based on the finite difference method and overrelaxation iteration method; the numerical solutions of the model is put forward and designed the overall the calculation process of coupling model, providing theoretical basis for further analyzing the piston system dynamic performance.

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State Evaluation of Diesel Engine Using Genetic Algorithm for the Feature Selection and Optimize

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.462-463.203 ◽

2013 ◽

Vol 462-463 ◽

pp. 203-208

Author(s):

Min Lin Liu ◽

Bo Yun Liu

Keyword(s):

Genetic Algorithm ◽

Feature Selection ◽

Fault Diagnosis ◽

Diesel Engine ◽

Optimum Parameter ◽

Piston Ring ◽

Simulation Experiment ◽

State Evaluation ◽

Cylinder Piston ◽

Normal Method

As for diesel engine fault diagnosis, it is more difficult to select the appropriate feature. In the paper, using the main parts state such as cylinder, piston and piston ring to diagnosis the fault of diesel engine. Eigenvalue is vital to the precision and efficiency fault diagnosis, the normal method to find the fault diagnosis eigenvalue is simulation experiment. Since the number of experiment cannot be too much, bootstrap is introduced in the paper, then using Genetic Algorithm, an optimum parameter combination has been received.

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Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring-Sleeve Friction Pair of Hydraulic Cylinders

Advances in Materials Science and Engineering ◽

10.1155/2021/5495995 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Wen’an Wang ◽

Zhiqi Liu ◽

Dongliang Chen ◽

Zhiming Xie ◽

Jianli Song

Keyword(s):

Friction Coefficient ◽

Surface Texture ◽

Surface Density ◽

Friction And Wear ◽

Piston Ring ◽

Friction Pair ◽

Wear Characteristics ◽

Texture Parameters ◽

Cylinder Piston ◽

Friction And Wear Characteristics

The surface texture, a major way to decrease friction and wear of the cylinder-piston ring friction pair, was conducted on cylinder-piston ring friction pair specimen using the orthogonal experimental design method to investigate the effect of different texture parameters (size, depth, shape, and surface density) of the friction and wear characteristics. Through simulation analysis, the texture parameters that affect the friction and wear characteristics are obtained. Using the evaluation method of friction coefficient and mass wear rate, the influence sequence and optimal values of texture parameters that affect friction and wear characteristics are obtained through range analysis. The results show that, after surface texture treatment under mixed lubrication conditions, the friction characteristics of the friction pair have changed and the friction coefficient and friction and wear rate have been significantly reduced. The results show that the triangular texture has a good antifriction effect, the texture depth is deepened, and the surface density and the size increases have a positive effect on the improvement of friction and wear. An ultra-depth microscope was used to observe the wear morphology of the friction and wear tests. The results show that the weakening of the third body wear by the texturing treatment and the maintenance of oil lubrication are the main reasons for reducing friction and wear.

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