scholarly journals Research and development of commercially viable lubricants to intensify working life of marine diesel engines and cylinder piston group in internal combustion engines

2021 ◽  
Vol 2021 (4) ◽  
pp. 62-74
Author(s):  
Vasiliy Aleksandrovich Chanchikov ◽  
Ivan Nikolaevich Guzhvenko ◽  
Alexandr Ivanovich Andreev ◽  
Marina Aleksandrovna Shulimova ◽  
Sergey Aleksandrovich Svekolnykov
Keyword(s):  
Diesel Engines ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Mechanical Mixing ◽  
Friction Modifier ◽  
Marine Engine ◽  
Piston Group ◽  
Molybdenum Diselenide ◽  
Marine Diesel ◽  
Cylinder Piston

The paper presents the results of studying the influence of variable characteristics of lubricating oils for marine diesel engines (concentration of layered friction modifier in lubricating oil, viscosity of lubricating oil, contact pressure in the friction zone) on the tribological parameters of parts of the cylinder-piston group of marine diesel engines. There are considered the aspects of increasing the reliability and wear resistance of the cylinder-piston group of marine diesel engines when a layered friction modifier is added to the base lubricating oil in a concentration of 1.5 vol.%. There have been carried out the comparative tribological studies of M-16G2CS lubricating oil including an additive based on molybdenum diselenide. Dependences of the wear of parts of the cylinder-piston group of a marine engine on different parameters of the studied lubricants are shown. The wear rate of experimental samples in conditions of variable characteristics of lubricants has been studied. According to the tribological studies of lubricants and structural materials, the tribological rating of lubricating compositions containing M16G2CS marine engine oil as a base and a layered friction modifier - molybdenum diselenide as a tribologically active additive was built. The test tool for the antiwear ability of lubricants is a friction machine of an original design with abraded samples according to the “ball-cylinder” contact scheme. Mechanical mixing of the lubricating medium of “oil + additive” type on the RPU-0.8-55A rotary-pulsating unit was one of the variable parameters in the tests. The tribological efficiency of the studied antiwear additive varies depending on the type of mixing of the additive solution before adding to the base lubricating oil and makes 13-54% (the difference in the diameter of the wear spot of the sample) for mechanical mixing, and for rotary-pulsation mixing - 45-56%.

scholarly journals Выбор индекса производительности центробежного сепаратора для комбинированных маслоочистительных комплексов судовых тронковых дизелей

2020 ◽  
Vol 45 (4) ◽  
Author(s):  
Keyword(s):  
Diesel Engines ◽  
Performance Index ◽  
High Speed ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Lubrication System ◽  
Centrifugal Separator ◽  
Resource Saving ◽  
Marine Diesel ◽  
Engine Wear

Показана перспективность комбинированной очистки моторного масла в судовых тронковых дизелях с использованием саморегенерирующихся фильтров и сепараторов. Этот метод очистки особенно эффективен для форсированных высокоавтоматизированных двигателей с низким угаром масла, работающих на высоковязких остаточных топливах. Обосновывается важность надежной защиты подшипников двигателя от абразивного изнашивания полнопоточным фильтрованием масла. Центробежный сепаратор, работающий по байпасной схеме, эффективно удаляет из системы смазки мелкодисперсную фазу нерастворимых загрязнений, что обеспечивает функционирование и повышает автономность саморегенерирующегося фильтра, а также замедляет старение смазочного масла. Доказывается необходимость подбора сепаратора по удельному индексу производительности, обеспечивающему ресурсосберегающее маслоиспользование в системе «дизель–топливо–масло– очистка». Новизна экспериментального моделирования эффективности этой системы состоит в оценке с помощью лабораторной моторной установки трибологических показателей отработавшего в судовом дизеле смазочного масла, отражающих взаимодействие звеньев рассматриваемой системы, и установлении их связи с изнашиванием двигателя. Эффективность системы идентифицирована по критерию изнашивания дизеля, что позволяет использовать ее расчетно-экспериментальную модель для определения параметров центробежного сепаратора – с тем, чтобы он удовлетворял требованиям рассматриваемых взаимодействующих звеньев. Модель трансформирована в выражение для расчета удельного, приходящегося на единицу мощности двигателя индекса производительности сепаратора, обеспечивающего минимальное изнашивание двигателя, бессменную работу смазочного масла и автономный срок службы саморегенерирующегося фильтра не менее 3 тыс. ч. Полученные рекомендации по подбору сепаратора в системе смазки двигателя с полной реализацией достоинств автоматизированной тонкой очистки моторного масла комбинированием фильтрования и центрифугирования применимы для судовых дизелей средней и повышенной частоты вращения мощностью до 20 тыс. кВт. Ключевые слова: ресурсосберегающее маслоиспользование, саморегенерирующийся фильтр, центробежный сепаратор, изнашивание дизеля, комбинированная очистка масла, смазочная система, индекс производительности сепаратора, оптимизация сепарирования масла The prospects of combined cleaning of engine oil in ship trunk diesel engines using self-regenerating filters and separators are shown. This cleaning method is especially effective for high-powered, highly automated engines with low oil waste, operating on high-viscosity residual fuels. The importance of reliable protection of engine bearings from abrasive wear by full-flow oil filtration is substantiated. The centrifugal separator, operating according to the bypass scheme, effectively removes the finely dispersed phase of insoluble contaminants from the lubrication system, which ensures the functioning and increases the autonomy of the self-regenerating filter, and also slows down the aging of the lubricating oil. The necessity of selecting a separator according to the specific performance index, which ensures resource-saving oil use in the “dieselfuel-oil-cleaning” system, is proved. The novelty of the experimental modeling of the efficiency of this system consists in evaluating the tribological indicators of the lubricating oil used in a marine diesel engine, reflecting the interaction of the links under consideration, on a laboratory motor unit, and establishing their connection with engine wear. The efficiency of the presented system is identified by the criterion of diesel wear, which makes it possible to use its computational and experimental model to determine the parameters of a centrifugal separator so that it meets the requirements of the considered interacting links. The model has been transformed into an expression for calculating the specific index of the separator performance per unit of engine power, which ensures minimum engine wear, permanent operation of the lubricating oil and an autonomous service life of a self-regenerating filter of at least 3 thousand hours. Full realization of the advantages of automated fine cleaning of engine oil by combining filtration and centrifugation, are applicable for marine diesel engines of medium and high speed with a capacity of up to 20 thousand kW. Keywords: resource-saving oil use, self-regenerating filter, centrifugal separator, diesel wear, combined oil purification, lubrication system, separator performance index, optimization of oil separation

scholarly journals EFFECT OF WASTE ENGINE OIL ON AGEING INTENSITY IN A MARINE DIESEL ENGINE WITH HIGH BOOST

2019 ◽  
pp. 71-77
Author(s):  
Liudmila Anatolievna Semeniuk ◽  
Maxim Igorevich Tarasov
Keyword(s):  
Diesel Engine ◽  
Engine Oil ◽  
Experiment Planning ◽  
Specific Rate ◽  
Motor Oil ◽  
Waste Engine Oil ◽  
Piston Group ◽  
The Matrix ◽  
Marine Diesel ◽  
Cylinder Piston

The key directions of the oil aging process are closely interrelated with its fumes and this is once again confirmed by the motor experiment. The degree of oxidation of the engine oil subjected to identification by increasing the concentration of insoluble impurities identifies the thermo-oxidative destruction of the present hydrocarbons. The results of modeling the process of wear of parts of the cylinder-piston group of marine diesel are considered. Through the application of the theory of experiment planning, the range of minimum wear is revealed, the dependence is focused on the values of the quality indicators of the used fuels and lubricants, the engine boost and the amount of engine oil burn. The change in the values in the main directions of oil aging as a result of reducing its fumes was noted. There has been revealed engine oil burnout in which the operation of the diesel engine is accompanied by less carbon and varnish formation on its pistons and the wear rate of the elements of the cylinder-piston group, the engine oil being in excellent condition in terms of the composition of aging products. Oil aging rate is determined at each stage of trial, according to sample analysis. There is given the matrix of experiment planning, as well as results of its processing. There are established the equations usable in trunk diesel operation that help to analyze general and specific rate of motor oil ageing, the initial values being values of oil waste, properties of fuels and lubricants and engine forcing. Motor oil of М-14-Г2 grade (circulating system) has been recommended to use for efficient and durable operation of ship diesels with average and low boost. For high powered engines operating on deep refining fuels it is possible to use the following oil grades: М-14-Д2 (cl 20) и М-14-Д2 (cl 30) with high neutralizing and motor qualities.

scholarly journals METHODS OF INCREASING EFFICIENCY OF THIN CLEARING ENGINE OIL BY IMPROVING FILTERING NONWOVENS IN OIL PURIFIERS OF MARINE DIESEL ENGINS

2018 ◽  
pp. 31-41
Author(s):  
Andrei Veniaminovich Nadezkin ◽  
Gennadiy Petrovich Kicha ◽  
Liudmila Anatolievna Semeniuk
Keyword(s):  
Service Life ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Specific Capacity ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Resource Saving ◽  
Marine Diesel ◽  
Oil Purification ◽  
Filtering Element

The article presents the results of motor tests of mass production filtering elements and new ones with improved performance in marine diesel engines. The filtering elements help to increase the efficiency of cleaning the engine oil and to lessen the engine wear and carbonation. The extended diesel service life is directly connected to the quality of oil purification. There has been carried out the analysis of developing filter technology regarding to engine oil cleaning in lubrication systems of ship medium-speed internal combustion engines equipped with different oil cleaners on the vessels of the Far Eastern basin. There have been presented the methods of increasing the throughput, dirt capacity and service life, as well as the fineness and completeness of sifting filtering elements due to the use of new filter materials. The dependence of the oil filtration rate on the efficiency of its purification is shown. Oil purification process can be intensified by means of decreasing the rate of oil filtering. To obtain the optimal filtering rate it is necessary to choose the appropriate size of a filtering element. Nowadays, the production technology of filtering elements is constantly improving, parameters of filtering materials are being upgraded, such as porosity, specific capacity, etc. There have been proposed measures to improve the hydraulic and filtering characteristics of nonwovens from cellulose and synthetic fibers of different thicknesses with different fillers and binders, which increases the permeability of papers, the number of pores per unit surface and a narrower distribution in diameter. New scientific and technical solutions are presented, which increase the efficiency of oil use in diesel engines. The ways of reducing the wear rate of the main parts in the engine due to full-flow fine cleaning of lubricating oil providing economical resource-saving operation of the trunk diesel engines are shown. The Russian industry manufactures the full-flow filtering elements and filtering materials relevant to the best international analogues.

Increasing the durability of the coupling "crankshaft neck – bearing liner" by applying nanocomposite additives to the engine oils of marine medium-speed diesel engines

2021 ◽  
pp. 93-100
Author(s):  
Л.Б. Леонтьев ◽  
Н.П. Шапкин ◽  
А.Л. Леонтьев ◽  
В.Н. Макаров ◽  
А.В. Арон
Keyword(s):  
Wear Resistance ◽  
Diesel Engines ◽  
Operating Conditions ◽  
Inorganic Materials ◽  
Engine Oil ◽  
High Wear Resistance ◽  
Medium Speed ◽  
Marine Diesel ◽  
Optimal Material ◽  
Technical Operation

Повышение долговечности трибосопряжений судовых дизелей, определяющих их ресурс, представляет собой актуальнейшую проблему, обусловленную как безопасностью мореплавания, так и экономическими факторами. Основной причиной отказов коленчатых валов двигателей, определяющих необходимость капитального ремонта, является износ шеек. Решение проблемы повышения износостойкости и, соответственно, долговечности связано с применением трибоактивных присадок в смазку. Несмотря на глубокие и обстоятельные исследования в области применения органо-неорганических материалов для использования в качестве присадок в моторное масло для повышения долговечности трибоузлов осуществить выбор оптимального материала для конкретных условий практически невозможно, так как исследования выполнены для различных условий эксплуатации и по различным методикам. Цель работы – разработка триботехнической присадки к моторным маслам, обеспечивающей повышение надежности и эффективности технической эксплуатации судовыхсреднеоборотных дизелей путем формирования тонкопленочного металлокерамического покрытия на поверхностях трения стальных деталей трибоузлов, позволяющего получить оптимальный комплекс параметров материала износостойкого покрытия. В работе представлены исследования эксплуатационных свойств присадок в моторное масло 17 органо-неорганических триботехнических материалов 4 групп — природные и искусственные полимеры, из которых были изготовлены свыше 20 композиций и композитов. Установлено, что наиболее перспективным является использование нанокомпозитов на основе вермикулита, модифицированного кислотой, в качестве присадок в моторное масло, так как они обладают минимальными коэффициентом трения при граничной смазке (0,007–0,014) а также высокой износостойкостью стали 40Х и обеспечивают минимальную величину скорости изнашивания вкладыша подшипника, благодаря чему повышается ресурс трибосопряжения более, чем в 3 раза, и соответственно снижаются эксплуатационные расходы. Increasing the durability of the tribo-couplings of marine diesel engines, which determine their resource, is an urgent problem due to both the safety of navigation and economic factors. The main reason for engine crankshafts failures, which determine the need for major repairs, is the wear of the necks. The solution to the problem of increasing wear resistance and, accordingly, durability is associated with the use of triboactive additives in the lubricant. Despite in-depth and thorough research in the field of application of organo-inorganic materials for use as additives in engine oil to increase the durability of tribo-nodes, it is almost impossible to choose the optimal material for specific conditions, since the studies were carried out for various operating conditions and according to various methods. The purpose of the work is to develop a tribotechnical additive to motor oils that provides an increase in the reliability and efficiency of technical operation of medium-speed marine diesel engines by forming a thin-film metal-ceramic coating on the friction surfaces of steel parts of tribo-nodes, which allows to obtain an optimal set of parameters of the wear-resistant coating material. The paper presents studies of the operational properties of additives in engine oil of 17 organo-inorganic tribotechnical materials of 4 groups — natural and artificial polymers, from which more than 20 compositions and composites were made. It has been established that the most promising is the use of nanocomposites based on vermiculite modified with acid as additives in engine oil, since they have a minimum coefficient of friction with boundary lubrication (0.007-0.014) as well as high wear resistance of 40X steel and provide a minimum wear rate of the bearing liner, thereby increasing the tribo-tension life by more than 3 times, and, accordingly, operating costs are reduced.

scholarly journals Методика для трибодиагностики судовых крейцкопфных дизелей на основе имитационного моделирования

2020 ◽  
Author(s):  
A.V. Golenishev ◽  
A.V. Nadezkin ◽  
M.E. Starchenko
Keyword(s):  
Diesel Engine ◽  
Simulation Model ◽  
Technical Condition ◽  
Operating Conditions ◽  
Marine Diesel Engine ◽  
Threshold Values ◽  
Piston Group ◽  
Marine Diesel ◽  
Cylinder Piston ◽  
Wear Products

Рассматриваются подходы по определению пороговых значений концентрации продуктов износа в отработанном цилиндровом масле, характеризующие переход объекта диагностирования судового крейцкопфного дизеля из одного технического состояния в другое. Показано, что существующие методики не учитывают индивидуальные особенности и техническое состояние деталей цилиндропоршневой группы. Предложено для решения задачи их трибодиагностики использовать разработанную имитационную модель, позволяющую провести моделирование процесса изнашивания цилиндровой втулки и поршневых колец судового дизеля и на основании полученных расчетов определить концентрацию продуктов износа поступивших в отработанное цилиндровое масло при различной скорости изнашивания трущихся деталей. Данные о фактической концентрации продуктов износа в отработанном цилиндровом масле в дальнейшем соотносятся с результатами моделирования, что позволяет оценить техническое состояние деталей цилиндропоршневой группы двигателя. Представлены результаты моделирования по определению пороговых значений концентрации продуктов износа в отработанном цилиндровом масле, характеризующее переход судового дизеля из исправного в несправное техническое состояние. Даны практические рекомендации по выбору пороговых значений содержания продуктов износа в отработанном цилиндровом масле для различных типов судовых крейцкопфных дизелей и условий их эксплуатации.The article examines approaches to determine the threshold values of the concentration of wear debris in used cylinder oil that characterize the transition of a ship crosshead diesel engine unit under test from one technical condition to another. It is shown that the existing methods do not take into account the individual characteristics and technical condition of the parts of the cylinder-piston group. To solve the problem of tribodiagnostics, it is proposed to use the developed simulation model, which allows modeling the wear process of the cylinder bushing and piston rings of a marine diesel engine and, based on the obtained results, determining the concentration of wear products issued in the used cylinder oil at different wear rates of the moving parts. The data on the actual concentration of wear products in the used cylinder oil are subsequently correlated with the simulation model results, which makes it possible to evaluate the technical condition of the parts of the engine cylinder-piston group. The article presents the results of modeling of threshold values determination of the concentration of wear products in used cylinder oil, that measure the transition of a marine diesel engine from a working condition to a malfunctioning technical condition. Practical recommendations are given on choosing threshold values for the concentration of wear products in used cylinder oil for various types of marine crosshead diesel engines and their operating conditions.

scholarly journals Influence of lubricating oil centrifugal separation intensity in combined cleaning systems on marine diesel engine

2020 ◽  
Vol 2020 (3) ◽  
pp. 23-32
Author(s):  
Nikolai Sergeevich Molokov ◽  
Gennadiy Petrovich Kicha ◽  
Andrei Veniaminovich Nadezkin
Keyword(s):  
Diesel Engines ◽  
Experimental Simulation ◽  
Lubricating Oil ◽  
Centrifugal Separation ◽  
Fuel Quality ◽  
Resource Saving ◽  
Minimum Value ◽  
Marine Diesel ◽  
Engine Wear ◽  
Capacity Index

The article considers the rationality of combined lubricating oil cleaning system in the automatically operated marine diesel engines. The system includes a self-recovering filter and a self-cleaning centrifugal purifier. This combination is found to obtain resource-saving oil using coupled with minimum engine wear and increased reliability. The full-flow filtration of oil in a die-sel engine lubricating system is necessary to protect its friction couples (bearings) from abrasive wear. Centrifugal separation contributes deep oil purification i.e. removal of insoluble impurities reducing lubricating oil service life. By means of experimental simulation there has been found a minimum value of centrifugal purifier capacity index, when engine wear reaches the lowest level and keeps stable. The dependence of engine wear on the fuel quality and centrifugal purification intensity represented by centrifugal purifier capacity index is displayed. The adequacy variance was calculated, the adequacy of the found model being checked by using Fisher criterion. The experimental design and processing of the results have been carried out using orthogonal central composite plan of the second order. Specificity of polynomial when all the points of extremum show the minimum value of engine wear was presented. The model is designed to select the proper oil purifier for forced marine diesel engines with average and increased revolutions.

Study on Wear of Piston Rings in Diesel Engines With Exhaust Gas Recirculation

2001 ◽  
Author(s):  
Tokuro Sato ◽  
Hideki Saito ◽  
Koji Korematsu ◽  
Junya Tanaka
Keyword(s):  
Diesel Engines ◽  
Time History ◽  
Acid Number ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Base Number ◽  
Piston Rings ◽  
Total Acid ◽  
Residual Content ◽  
Measured Time

Abstract The wear of piston rings in the diesel engines with EGR system is studied experimentally. In order to clarify the effect of PM on the wear, the wear of the piston rings in the test engine is measured, (1) when the non-soluble in the lubricating oil is removed by the oil filters, (2) when PM in the re-circulating gas is removed by the DPF, (3) when the carbon black is added in the lubricating oil. The experimental results are discussed with the measured time history of kinematic viscosity, total base number, total acid number, ZDTP survival rate, and carbon residual content and its particle size in the engine oil.

scholarly journals Assessment of the impact of the technical condition of the cylinder-piston group parts on nitrogen oxide emissions

2021 ◽  
Vol 2131 (5) ◽  
pp. 052058
Author(s):  
O Roslyakova ◽  
V Zaitsev ◽  
D Panov
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Technical Condition ◽  
Working Process ◽  
Mixture Formation ◽  
Special Equipment ◽  
Harmful Emissions ◽  
Marine Diesel ◽  
Cylinder Piston ◽  
The Impact

Abstract Nowadays, a lot is paid to environmental protection issues, including those related to reducing emissions from ships of the sea and river fleet, which is reflected in many works. Constant control over the content of harmful emissions in the environment forces us to deal with the issues of reducing emissions from diesel engines at the design stages and during operation. The solution to this problem allows us to consider 2 directions: constructional and the use of special equipment for capture and neutralization. In the best case, a combined method can be used, i.e. constructional with the use of capturing equipment for harmful components in diesel exhaust gases. This paper presents an analysis of the influence of various factors that reduce the load on the atmospheric air from nitrogen oxides of marine diesel engines, namely, from the operating settings of the diesel engine and its wear. On the ships of the river fleet, diesel engines are used with various mixture formation with volumetric, volumetric-film, vortex mixture formation. The leader in the listed group is the volumetric mixture engines. The paper provides an assessment of the research carried out to analyze various methods of influencing the working process of a diesel engine - the type of mixture formation, wear of the cylinder sleeve in order to determine their influence on the formation of NOx emissions.

scholarly journals A STUDY ON OPERATIONAL PROPERTIES OF ANTI-WEAR ADDITIVES FOR MOTOR LUBRICATING OILS DEPENDING ON THEIR PROCESSING AND SEDIMENTATION

2020 ◽  
pp. 110-123
Author(s):  
Arshavir P. Perekrestov ◽  
Ali Salameh ◽  
Vasiliy A. Chanchikov ◽  
Ivan N. Guzhvenko ◽  
Abdullahi Y. Abubakarov
Keyword(s):  
Internal Combustion Engines ◽  
Storage Time ◽  
Subsequent Treatment ◽  
Solid Component ◽  
Wear Properties ◽  
Friction Modifier ◽  
Molybdenum Diselenide ◽  
Marine Diesel ◽  
Sedimentation Resistance ◽  
Additive Solution

The article presents studies on the dependence of sedimentation resistance of the anti-wear additive solid component for marine diesel trunk-type internal combustion engines on the technological conditions of its manufacturing. A friction modifier, molybdenum diselenide, which has optimal anti-wear properties, was selected as a solid component. The authors consider the process of sedimentation of a given substance, stabilized in the volume of an additive solution with unsaturated acids, at different times of rotary stirring, and under the influence of subsequent treatment of the prepared solution with ultrasound. The mass of the solution solid component is studied as irretrievably precipitated over various periods of storage time of the additive solutions, subjected to rotary stirring and additional ultrasonic treatment. The recommended storage time of the considered anti-wear additive with a 10% content of molybdenum diselenide has been established.

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