Influence of load on the tribological conditions in piston ring and cylinder liner contacts in a medium-speed diesel engine

2006 ◽  
Vol 39 (12) ◽  
pp. 1643-1652 ◽  
Author(s):  
Jaana Tamminen ◽  
Carl-Erik Sandström ◽  
Peter Andersson
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Medium Speed

3-D Numerical Simulation and Experiment Study on the Wear of Piston Ring-Cylinder Liner

2010 ◽  
Vol 139-141 ◽  
pp. 1036-1039 ◽  
Author(s):  
Jian Ping Zhang ◽  
Yan Kun Jiang ◽  
Xin Liu ◽  
Zhe Lin Dong
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Elastohydrodynamic Lubrication ◽  
Cylinder Liner ◽  
Effect Of Temperature ◽  
Wear Loss ◽  
Asperity Contact ◽  
Warm Start ◽  
Deformation Equation ◽  
Marine Diesel

Aiming at a large marine diesel engine, a mathematical model for the 3-D elastohydrodynamic lubrication analysis of piston ring-cylinder liner was presented. The average Reynolds equation and asperity contact approach were combined with the elastic deformation equation. The asymmetry in the circumferential direction, gas blowby and the effect of temperature and pressure on the oil density and viscosity were considered. The 3-D wear simulation of piston ring-cylinder liner was performed when the diesel engine was operated under warm start and cold start conditions, respectively. The 3-D distribution rules show that the first gas ring has the biggest wear loss, and the maximum wear loss of cylinder liner occurs in the vicinity of TDCF. Finally, the results matched well with the wear measurements, and it indicates the present method is effective and can help engineers to improve the tribological performance of the diesel engine.

Methods for Determining the Thermal State of Medium-Speed Diesel Engines Taking into Account Boiling of the Coolant

2020 ◽  
pp. 22-28
Author(s):  
L.L. Myagkov ◽  
V.M. Sivachev
Keyword(s):  
Heat Transfer ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Thermal State ◽  
Cooling System ◽  
Fatigue Cracks ◽  
Cylinder Liner ◽  
Thermal Factor ◽  
Medium Speed ◽  
Thermal Fatigue Cracks

Forcing medium-speed diesel engines by increasing the mean effective pressure leads to an increase in the thermal factor of the engine parts. High temperatures of the cylinder head fire deck and the cylinder liner working surface cause thermal fatigue cracks in these parts as well as piston scuffing. Therefore, the development of new methods of intensifying heat transfer in the cooling gallery and refined methods for determining the engine parts thermal state is currently relevant. In both areas of research, a significant role is played by the process of coolant boiling, which significantly intensifies heat transfer in the cooling system. A review of the literature showed that the existing methods of mathematical modeling of conjugate heat transfer in the cooling cavities taking into account the boiling process have a number of significant drawbacks. This paper presents the developed mathematical model and methods for determining the thermal state of medium-speed diesel engine parts taking into account boiling of the coolant, thus making it possible to combine the advantages of both the engineering approach and numerical simulation based on computational fluid dynamics. The thermal state of a new generation medium-speed diesel engine D500 was calculated and the thermal factor of the main engine parts was estimated.

First Paper: Measurement of the Oil-Film Thickness between the Piston Rings and Liner of a Small Diesel Engine

1974 ◽  
Vol 188 (1) ◽  
pp. 253-261 ◽  
Author(s):  
G. M. Hamilton ◽  
S. L. Moore
Keyword(s):  
Diesel Engine ◽  
Film Thickness ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Piston Rings ◽  
Oil Film

A capacity gauge has been designed for operating in the conditions of a working engine. The method of using it for determining the oil-film thickness and piston-ring profile is described. Oil-film thicknesses in the range 0·4-2·5 μm between the piston rings and the cylinder liner have been observed. Their variation with speed, load and temperature has been measured and it is concluded that their behaviour is essentially hydrodynamic.

Continued Development of a Coal/Water Slurry-Fired Slow-Speed Diesel Engine: A Review of Recent Test Results

1987 ◽  
Vol 109 (4) ◽  
pp. 465-476 ◽  
Author(s):  
S. E. Nydick ◽  
F. Porchet ◽  
H. A. Steiger
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Diesel Oil ◽  
Pollutant Emissions ◽  
Liquid Fuels ◽  
Slow Speed ◽  
Water Slurry ◽  
Technological Advances ◽  
Coal Water Slurry

The results of tests performed on a slow-speed, two-stroke single-cylinder diesel engine show that thermal efficiency is approximately the same when fired with coal/water slurry fuels and diesel oil and that exhaust pollutant emissions, most notably NOx, are lower with the coal/water slurry fuels. Engine wear, particularly at the piston ring/cylinder liner interface, is considerably greater than that which occurs with liquid fuels. However, it is concluded that by means of technological advances regarding piston ring/cylinder liner materials, new designs, and new concepts in lubrication, a reliable and economical coal/water slurry-fired slow-speed engine can be developed.

Development of High Temperature Diesel Engine Piston Ring and Cylinder Liner Tribology

2003 ◽  
Author(s):  
Lloyd Kamo ◽  
Philipe Saad ◽  
Rudolf Mnatsakanov ◽  
Walter Bryzik ◽  
Milad Mekari
Keyword(s):  
High Temperature ◽  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Engine Piston

Effects of textured cylinder liner piston ring on performances of diesel engine under hot engine tests

2021 ◽  
Vol 146 ◽  
pp. 111193
Author(s):  
Xiang Rao ◽  
Chenxing Sheng ◽  
Zhiwei Guo ◽  
Xuecheng Zhang ◽  
Huabing Yin ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner

scholarly journals Actual Results of Cylinder Liner and Piston Ring Wear of Recent Marine Low Speed Diesel Engine

1992 ◽  
Vol 27 (3) ◽  
pp. 248-261
Author(s):  
Tadahiko Kurosawa ◽  
Renpei Harada ◽  
Tetsuro Shikata ◽  
Kaname Tanaka
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Low Speed

scholarly journals Ceramic-metal Composite Coated Piston Ring and Cylinder Liner of Marine Low Speed Diesel Engine

1992 ◽  
Vol 27 (3) ◽  
pp. 238-247 ◽  
Author(s):  
Masaki Tanaka ◽  
Yoshihisa Kitajima ◽  
Yasuhisa Endoh ◽  
Masaoki Watanabe ◽  
Yutaka Nagita
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Metal Composite ◽  
Low Speed

scholarly journals Wear Test of Cylinder Liner and Piston Ring of Marine Diesel Engine Based on Computer Simulation Technology

2021 ◽  
Vol 2074 (1) ◽  
pp. 012033
Author(s):  
Chen Peng
Keyword(s):  
Computer Simulation ◽  
Diesel Engine ◽  
Piston Ring ◽  
Wear Test ◽  
Cylinder Liner ◽  
System Structure ◽  
Mechanical Equipment ◽  
Marine Diesel Engine ◽  
Practical Operation ◽  
Marine Diesel

Abstract With the development of computer technology, computer simulation has become a powerful tool to carry out liner - piston ring wear experiment of Marine diesel engines. Turbocharged diesel engine is a typical multi-system and multi-level complex power plant. There are many factors that affect the piston change and wear speed of diesel engine in practical operation, and many factors are interrelated and influence each other. Marine diesel engine is the most important mechanical equipment in Marine engine room, which has a complex system structure. If the diesel engine fails, it will seriously affect the navigation safety of the ship. In order to reduce the loss of Marine diesel engine piston ring wear, it is necessary to rely on fault diagnosis technology for timely and reliable diagnosis and maintenance.

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