scholarly journals Optimizing the Exhaust System of Marine Diesel Engines to Improve Low-speed Performances and Cylinder Working Conditions

2021 ◽  
Vol 17 (4) ◽  
pp. 683-695
Author(s):  
Sheng Liu ◽  
Ling Leng ◽  
Wenjie Zhou ◽  
Lei Shi
Keyword(s):  
Working Conditions ◽  
Diesel Engines ◽  
Exhaust System ◽  
Low Speed ◽  
Marine Diesel

scholarly journals Analysis of Principal Particulars of Two-Stroke Low-Speed Marine Diesel Engines

1993 ◽  
Vol 28 (10) ◽  
pp. 635-643
Author(s):  
Tetusya Oyamada ◽  
Yutaro Wakuri ◽  
Yoshinori Hirayama ◽  
Keijiro Tayama ◽  
Shigemi Ono
Keyword(s):  
Diesel Engines ◽  
Low Speed ◽  
Marine Diesel

Maintenance and repair of marine diesel engines. In 4 volumes

2021 ◽  
Author(s):  
Nikolay Sherstnev
Keyword(s):  
Working Conditions ◽  
Diesel Engines ◽  
Power Plants ◽  
Educational Institutions ◽  
Design Features ◽  
Higher Educational Institutions ◽  
Maintenance And Repair ◽  
University Teachers ◽  
Marine Diesel ◽  
Main Components

The second volume of the textbook shows the design features of the main components and parts of the movement groups that affect their working conditions and methods of maintenance and repair. Recommendations on the frequency of regulated work and possible malfunctions are given. With examples from ship practice, the methods of disassembly-assembly, defection and repair of the main components and parts of the movement groups are considered. The previous and subsequent volumes show the design features, provide recommendations on the frequency of regulated work and maintenance and repair of other components and parts of marine diesel engines. It is intended for students of higher educational institutions in the specialty "Operation of marine power plants" and university teachers. It may be useful for ship mechanics.

MV “CRYSTAL STAR” Diesel Turbocharger Surge Cause Analysis and Troubleshooting

2014 ◽  
Vol 672-674 ◽  
pp. 1562-1567
Author(s):  
Bin Li ◽  
Shou Jun Zhang
Keyword(s):  
Working Conditions ◽  
Diesel Engines ◽  
Preventive Measures ◽  
Fuel Oil ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Oil Consumption ◽  
Cause Analysis ◽  
Shipping Costs ◽  
Marine Diesel

Currently shipping costs are increasing sharply due to the rising oil prices. In order to reduce shipping costs, most low-speed two-stroke diesel engines run at low speeds to reduce fuel oil consumption, and this measure might result turbocharger surge. For modern marine diesel engines, the exhaust gas turbochargers are becoming more and more important; their working conditions have a direct impact on the performance of diesel engines, consequently affecting the operation of the ship. Surge will fail a turbocharger to achieve the supercharging ratio, damage the turbocharger components and even lead to a damage accident of the whole turbocharger. Therefore, a good understanding of the reasons for marine diesel engine turbocharger surge will help to prevent and eliminate turbocharger surge in operation. This paper is to make an analysis on the special surge mechanism occurred to the turbocharger on MV "Crystal Star", and propose some appropriate supervisory and preventive measures against the problem.

A tribological analysis on stuffing box-piston rod system of low-speed marine diesel engines

2018 ◽  
Vol 20 (8-9) ◽  
pp. 911-930 ◽  
Author(s):  
Rui Li ◽  
Xianghui Meng ◽  
Youbai Xie
Keyword(s):  
Film Thickness ◽  
Diesel Engines ◽  
Oil Film ◽  
Low Speed ◽  
Rod System ◽  
Marine Diesel ◽  
Ring Location ◽  
Lubrication Condition ◽  
Ring Pack ◽  
Starved Lubrication

The stuffing box-piston rod system is widely used in the low-speed marine diesel engines to scrape oil and ensure sealing. Its friction power loss and wear rate are great, but the studies about the system are very limited. In this study, based on the special structure and working conditions of the stuffing box, the analytical model for the tribological properties of the stuffing box-piston rod system is developed considering the oil starvation and relative ring location effects. The minimum oil film thickness, friction, oil transportation, and asperity contact are calculated for the stuffing box. The analysis results show that compared with the fully flooded lubrication, the minimum oil film thicknesses of the rings reduce significantly in the middle of the strokes under the starved lubrication condition, but the friction losses of the rings are influenced by the comprehensive effects of the oil film thickness reduction and lubricating area reduction under the starved lubrication condition, which is related to the specific profiles of the rings. In addition, compared with the engine piston ring pack, the relative ring location effect is more obvious in the stuffing box ring pack because there are more rings and the ring intervals are larger. The relative ring location effect makes the minimum oil film thicknesses, friction forces, and asperity contacts of the rings have oscillations after bottom dead center and top dead center.

Influence of Biodiesel Blends on Characteristics of Gaseous Emissions from Two Stroke, Low Speed Marine Diesel Engines

2017 ◽  
pp. 49-63
Author(s):  
Danilo Nikolic ◽  
Sead Cvrk ◽  
Nada Marstijepovic ◽  
Radmila Gagic ◽  
Ivan Filipovic
Keyword(s):  
Diesel Engines ◽  
Gaseous Emissions ◽  
Biodiesel Blends ◽  
Low Speed ◽  
Marine Diesel

scholarly journals Studies on the Characteristics of the Initial Running-in of the Piston Ring for Low-Speed Marine Diesel Engines

1996 ◽  
Vol 31 (3) ◽  
pp. 181-192
Author(s):  
Shoji Mitsutake ◽  
Fumiharu Takahashi
Keyword(s):  
Diesel Engines ◽  
Piston Ring ◽  
Low Speed ◽  
Marine Diesel

Maintenance and repair of marine diesel engines

2021 ◽  
Author(s):  
Nikolay Sherstnev
Keyword(s):  
Working Conditions ◽  
Diesel Engines ◽  
Power Plants ◽  
Educational Institutions ◽  
Maintenance And Repair ◽  
University Teachers ◽  
Marine Diesel ◽  
Main Components ◽  
And Control ◽  
External Inspection

The first volume of the textbook shows the features of the layout of marine diesel engines, the composition of the external inspection and control of their work, the designs of components and parts of the frames that affect their working conditions and methods of maintenance and repair. Recommendations on the frequency of regulated work and possible malfunctions are given. With examples from ship practice, the methods of disassembly-assembly, defection and repair of the main components and parts of the framework are considered. The following volumes show the design features, provide recommendations on the frequency of regulated work and maintenance and repair of other components and parts of marine diesel engines. It is intended for students of higher educational institutions in the specialty "Operation of marine power plants" and university teachers. It may be useful for ship mechanics.

scholarly journals ADVISABLE CRITERIA FOR THE ESTIMATION OF UNBALANCE IN LOW-SPEED MARINE DIESEL ENGINES

2012 ◽  
Vol 1 (12) ◽  
pp. 94-99
Author(s):  
Nikolay A. Taranukha ◽  
◽  
Sergei A. Khudiakov ◽  
Keyword(s):  
Diesel Engines ◽  
Low Speed ◽  
Marine Diesel

scholarly journals Actual Wear Condition of Cylinder Liner and Piston Ring on Recent Low Speed Marine Diesel Engines

1995 ◽  
Vol 30 (3) ◽  
pp. 248-258
Author(s):  
Hiroyuki Ide ◽  
Yuji Tsutsumi ◽  
Seimei Arai ◽  
Takaaki Inoue
Keyword(s):  
Diesel Engines ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Low Speed ◽  
Marine Diesel ◽  
Wear Condition

scholarly journals Increasing the reliability of electronically controlled marine diesel parts

2020 ◽  
pp. 45-52
Author(s):  
А.В. Игнатенко ◽  
М.М. Фролов ◽  
С.А. Худяков
Keyword(s):  
Performance Improvement ◽  
Diesel Engines ◽  
Hydraulic System ◽  
Carbon Steels ◽  
Operating Costs ◽  
Electronic Control ◽  
Low Speed ◽  
Marine Diesel ◽  
Service Data ◽  
Exhaust Valves

Эксплуатации судовых малооборотных дизелей с электронным управлением свидетельствует о том, что со временем появляются повреждения и отказы, связанные с естественными износами пар трения, особенно прецизионных, в силовой гидравлической системе (СГС), топливных насосах высокого давления и форсунках, а также выпускных клапанах с гидравлическим приводом. Фирмы изготовители судовых малооборотных дизелей для улучшения эксплуатационных показателей и повышения ресурсов указанных деталей широко используют новые более износостойкие и жаропрочные материалы, такие как высокоуглеродистые легированные стали, нержавеющие стали, сплавы на основе кобальта – стиллиты, сплавы на основе никеля – нимоники и инконели, в частности для выпускных клапанов. Такое решение позволяет повысить надёжность деталей, увеличить межремонтные периоды и гарантировать более длительный срок службы, одновременно снизив эксплуатационные затраты, несмотря на некоторое повышение стоимости этих деталей. Приведены характеристики указанных материалов ожидаемые и подтвержденные данные об увеличенных межремонтных интервалах. The operation of low-speed marine diesel engines with electronic control indicates that over time, damage and failures appear associated with natural wear of friction pairs, especially precision ones, in the power hydraulic system, high-pressure fuel pumps and injectors, as well as hydraulically operated exhaust valves. Engine makers / manufacturers in the due course of marine low-speed diesel engines performance improvement and enhancement sourced the way to extend the lifetime for these parts by utilizing modern highly reliable wear-resistant and heat-resistant materials, including high-percentage carbon steels, stainless steels, cobalt-based alloys - stillites, nickel-based alloys - nimonic and inconel, in particular for exhaust valves. This solution allows to increases the reliability of parts, extend “in between the overhaul” periods and guarantees longer service life, and at the same time to lower the operating costs, despite a slight increase in the initial investments related to the higher cost of these parts. The characteristics of the above materials are listed and the service data related to between the overhaul periods are included.

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