Simulation of lubricating oil centrifugal separator performance index influence on marine diesel engine wear

2021 ◽  
pp. 79-85
Author(s):  
Н.С. Молоков ◽  
Г.П. Кича ◽  
М.И. Тарасов
Keyword(s):  
Diesel Engine ◽  
Performance Index ◽  
Internal Combustion Engines ◽  
Oil Quality ◽  
Lubricating Oil ◽  
Centrifugal Separator ◽  
Resource Saving ◽  
Autonomous Operation ◽  
High Purification ◽  
Engine Wear

Представлена методика подбора центробежного сепаратора для комбинированных систем тонкой очистки моторного масла в двигателях внутреннего сгорания. Предложен показатель (индекс производительности сепаратора), который характеризует интенсивность разделения гетерогенных систем центрифугированием. Показана зависимость скорости изнашивания основных деталей дизеля от качества используемых горюче-смазочных материалов и интенсивности очистки масла (индекса производительности сепаратора). Рассмотрены преимущества комбинированной системы очистки смазочного масла, включающие в себя центробежный сепаратор, обеспечивающий очистку масла от нерастворимых загрязнений мелкодисперсной фазы работающий совместно с саморегенерирующимся фильтром. Благодаря такому сочетанию обеспечивается минимальной изнашивание пар трения дизеля. Преимущество данного метода очистки также заключается в возможности обеспечения автономной работы механизмов смазочной системы при сохранении высокой эффективности очистки. С помощью экспериментального моделирования определено минимальное значение индекса производительности центробежного сепаратора, необходимое для стабилизации изнашивания деталей дизеля и достижения ресурсосберегающего маслоиспользования. Проиллюстрировано сравнение результатов моделирования с экспериментальными данными. Methods of centrifugal separator selection for lubricating oil combined purification systems of internal combustion engines are represented. Purification intensity parameter (performance index) for description of heterogeneous medium separation is offered. The relation between separation intensity (separator performance index) and engine wear is shown as well as its dependence on fuel and lubricating oil quality. Advantages of lubricating oil combined cleaning method by means of centrifugal purifier, used for insoluble particles removal together with the self-regenerating filter are represented. Due to their combination the minimum wear of diesel engine friction coupling can be achieved. Benefits of the method lie in autonomous operation of lubricating system for a long period of time together with high purification efficiency. Minimum value of separator performance index, required to stabilize engine parts wear and achieve resource-saving oil use has been determined by means of experimental design. Simulation results have been compared with experimental data and effect of comparison has been represented.

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

Influence of waste of lubricating oil on the intensity of its aging in a marine trunk diesel engine

2021 ◽  
pp. 56-65
Author(s):  
М.И. Тарасов ◽  
Г.П. Кича ◽  
А.В. Надежкин
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Fuel Oil ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Engine Fuel ◽  
Operating Life ◽  
Resource Saving ◽  
Aging Model ◽  
Operating Modes

Представлены результаты моделирования старения моторного масла в судовом тронковом дизеле при разном его угаре с идентификацией влияния на степень окисления, срабатывание присадок (по щелочности), накопление нерастворимых продуктов, рост кислотности и смолообразования форсировки двигателя и качества применяемых горюче-смазочных материалов. Показана рациональность исследования процесса старения смазочного масла в циркуляционной системе смазки одноцилиндрового отсека дизеля в лабораторных условиях, что позволяет выдерживать контролируемые параметры комплекса «дизель – топливо – масло» (ДТМ) и снизить затраты на моторные испытания. По результатам расчетно-эксперементального исследования получена модель старения смазочного масла по удельным, приходящимся на единицу мощности двигателя показателям, которая позволяет прогнозировать его состояние в зависимости от срока службы и своевременно отбраковывать. Показана адекватность модели старения по экспериментальным данным использования моторного масла в судовом полноразмерном тронковом дизеле повышенной форсировки. Разработанная модель по указанным направлениям старения позволяет определить состав и режимы функционирования комплекса ДТМ, при которых обеспечивается ресурсосберегающее маслоиспользование в двигателях внутреннего сгорания. This paper presents the results of an engine oil aging model in a marine trunk diesel engine under different combustion conditions with characterization of the effect on the oxidation rate, the actuation of additives (by alkalinity), the accumulation of non-soluble products, an increase in acidity and gumming of the engine boost and the quality of the utilized fuels and lubricants. The efficiency of the lubricating oil aging process study in the circulating lubrication system of a single-cylinder diesel compartment in laboratory conditions is also shown in the article, this allows to maintain the controlled parameters of the «diesel – fuel – oil» system and to reduce the cost of motor tests. Based on the results of a computational-experimental study a lubricating oil aging model was obtained in terms of specific indicators per unit of engine power, which allows to predict its condition depending on the operating life and to promptly discard it. The adequacy of the aging model is based on experimental data of the engine oil use in a ship's full-size trunk diesel engine with increased boost. The developed model of the indicated directions of aging makes it possible to determine the composition and operating modes of the «engine-fuel-oil» system, which ensures resource-saving oil use in internal combustion engines.

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.

scholarly journals OPTIMIZATION OF WASTE MOTOR OIL IN SHIP DIESEL WITH HIGH BOOST BY WEAR CRITERION

2018 ◽  
pp. 78-86
Author(s):  
Maxim Igorevich Tarasov ◽  
Georgy Alexandrovich Gauk ◽  
Liudmila Anatolievna Semeniuk
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Optimal Level ◽  
Engine Oil ◽  
Resource Saving ◽  
Engine Wear ◽  
The Impact

The results of modeling the impact of oil burning on the condition of the ship forced trunk piston diesel engine when using lubricants with different operating properties. The dependence of wear rate on oil fume, the quality of used lubricants and marine diesel forcing is obtained by modeling wear using the theory of planning experiments. The area of minimal wear has been determined. There has been detected the most efficient waste oil providing favorable conditions for resource-saving operation of the internal combustion engine. It is inferred that reduction of engine oil fume changes the main parameters of its aging. At the same time, the intensity of oil aging in main directions and of engine wear reduce from 0.75 to 2.25 g/(kW∙h), whereas the fume increases. Its further increase is accompanied by an increase in the rate of oil aging and engine wear. The detected "fracture" depending on И( g y) after passing the border g yopt = 2.25-2.5 g/(kW∙h) is stipulated by different ratio of oil exchange in the lubrication system and the ingress of gases into the crankcase. There has been determined the degree of oil burning, at which sludging and lacquer formation of the internal combustion engine is least intense. The smallest carbon deposits on pistons and in the crankcase of the engine can be observed when the diesel engine is operating in the zone of optimal carbonation. Experimentally, the dependence of tribotechnical properties, in particular, wear of insoluble products of oil aging has been detected at different degrees of oil burning. It is revealed that these characteristics also depend on the quality of the used fuels and lubricants and the conditions of formation and turnover of the oil film on the mirror of the cylinder, the thermal effect on it of the engine workflow. The result of simulation is the prediction of resource-saving operation of marine trunk diesel engines by maintaining oil fume at the optimal level.

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.

scholarly journals Analysis of lubricant oil contamination and degradation and wear of a biogas-fed otto cycle engine

2017 ◽  
Vol 39 (4) ◽  
pp. 409 ◽  
Author(s):  
Rovian Bertinatto ◽  
Leandro Friedrich ◽  
Reinaldo Aparecido Bariccatti ◽  
Samuel Nelson Melegari de Souza ◽  
Flavio Gurgacz ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Oil Quality ◽  
Engine Oil ◽  
Oil Contamination ◽  
Combustion Engines ◽  
Lubricant Oil ◽  
Wear And Corrosion ◽  
Oil Performance ◽  
Engine Wear ◽  
The Cost

The increasing deployment of biodigesters for the treatment of waste on farms and the use of the biogas generated in the production of energy have highlighted the need for knowing the influence of this fuel on internal combustion engines. This study aimed to analyze the influence of filtrated biogas on lubricant oil contamination and degradation, as well as on engine wear and corrosion. Lubricant oil samples were collected every 75 engine operating hours (EOH) and then correlated between each other and with a sample of new oil, determining the elements present in the biogas that contribute to lubricant oil contamination and degradation, as well as lubricant oil performance in the course of EOH and engine wear. The results demonstrate that hydrogen sulfide affects the performance of the lubricant oil and engine wear. Among the metals, we observed that the copper concentration exceeded the maximum limit recommended in the literature. As for the additives, the variation in concentrations of magnesium impacted on lubricant performance. By monitoring lubricant oil quality were able to extend the engine oil change interval of this study by 50%, what resulted in a savings of 33.3% in the cost of lubricant per hour worked.

scholarly journals Mineral Deposit Formation in Gas Engines During Combustion of Biogas from Landfills and Municipal WWTP

2020 ◽  
Vol 27 (3) ◽  
pp. 347-356
Author(s):  
Izabela Konkol ◽  
Jan Cebula ◽  
Jolanta Bohdziewicz ◽  
Krzysztof Piotrowski ◽  
Piotr Sakiewicz ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Calcium Content ◽  
Mineral Deposit ◽  
Lubricating Oil ◽  
Municipal Wastewater Treatment ◽  
High Concentration ◽  
Engine Wear ◽  
Engine Failure

AbstractThe biogas produced in municipal wastewater-treatment plants (WWTP) should be cleaned before it can be used as a fuel in internal combustion engines. Efficient running of such engines is possible only subject to using high quality biogas and lubricating oil. Otherwise, biogas impurities in course of complex chemical reactions may form deposits on various engine parts as well as seriously contaminate the lubricating oil. In this paper, mineral deposits containing high concentration of bismuth, silicon, sulphur, calcium and zinc are studied. Silicon deposits demonstrating strong friction properties are formed during combustion of volatile silica compounds. As these deposits build up, abrasion problems, ignition failure and even engine failure result. The bismuth containing deposits comes from bearings degradation, zinc and calcium were derived from the additives present in commercially available lubricating oil, while lead, aluminium, copper, nickel, iron and chromium were introduced by engine wear phenomena. The highest bismuth content was located at the engine cylinder heads and the lowest at the exhaust elements, whereas highest calcium content was registered on the pistons. Silicon containing deposits are highest in the exhaust and lowest at the engine head. Zinc deposits are highest at the piston.

DIESEL ENGINE OPERATION IN USE OF FUEL WITH ADDITIVES

2018 ◽  
pp. 18-24
Author(s):  
Petar Kazakov ◽  
Atanas Iliev ◽  
Emil Marinov
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Experimental Studies ◽  
Combustion Engines ◽  
Engine Operation ◽  
Factors Affecting ◽  
Operating Modes ◽  
Positive Effects

Over the decades, more attention has been paid to emissions from the means of transport and the use of different fuels and combustion fuels for the operation of internal combustion engines than on fuel consumption. This, in turn, enables research into products that are said to reduce fuel consumption. The report summarizes four studies of fuel-related innovation products. The studies covered by this report are conducted with diesel fuel and usually contain diesel fuel and three additives for it. Manufacturers of additives are based on already existing studies showing a 10-30% reduction in fuel consumption. Comparative experimental studies related to the use of commercially available diesel fuel with and without the use of additives have been performed in laboratory conditions. The studies were carried out on a stationary diesel engine СМД-17КН equipped with brake КИ1368В. Repeated results were recorded, but they did not confirm the significant positive effect of additives on specific fuel consumption. In some cases, the factors affecting errors in this type of research on the effectiveness of fuel additives for commercial purposes are considered. The reasons for the positive effects of such use of additives in certain engine operating modes are also clarified.

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