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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2024-01-179</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-946</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MINING MACHINERY, TRANSPORT, AND MECHANICAL ENGINEERING</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ГОРНЫЕ МАШИНЫ, ТРАНСПОРТ И МАШИНОСТРОЕНИЕ</subject></subj-group></article-categories><title-group><article-title>Impact of the technical condition of main pumps on fuel consumption in a hydraulic excavator</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние технического состояния главных насосов гидравлического экскаватора на расход топлива</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5873-5550</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рахутин</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Rakhutin</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Григорьевич Рахутин – доктор технических наук, профессор кафедры горного оборудования, транспорта и машиностроения</p><p>г. Москва</p><p>Scopus ID 57200152323</p><p> </p></bio><bio xml:lang="en"><p>Maxim G. Rakhutin – Dr. Sci. (Eng.), Professor of the Department of Mining Equipment, Transport and Mechanical Engineering</p><p>Moscow</p><p>Scopus ID 57200152323</p></bio><email xlink:type="simple">rahutin.mg@misis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0962-5835</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чан</surname><given-names>В. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Tran</surname><given-names>V. H.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ван Хиеп Чан – кандидат технических наук, преподаватель факультета механики</p><p>г. Ханой</p></bio><bio xml:lang="en"><p>Van Hiep Tran – Cand. Sci. (Eng.), Lecturer of the Mechanical Engineering Faculty</p><p>Hanoi</p><p> </p></bio><email xlink:type="simple">hieptv@lqdtu.edu.vn</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7198-4447</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кривенко</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Krivenko</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Евгеньевич Кривенко – кандидат технических наук, доцент кафедры горного оборудования, транспорта и машиностроения</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Alexander E. Krivenko – Cand. Sci. (Eng.), Associate Professor of the Department of Mining Equipment, Transport and Mechanical Engineering</p><p>Moscow</p><p>Scopus ID 57210220257</p></bio><email xlink:type="simple">Krivenko.ae@misis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-8589-5609</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Занг</surname><given-names>К. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Giang</surname><given-names>Q. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Куок Кхань Занг – кандидат технических наук, декан факультета механической технологии</p><p>г. Хайзыонг</p><p> </p></bio><bio xml:lang="en"><p>Quoc Khanh Giang – Cand. Sci. (Eng.), Dean of the Faculty of Mechanical Engineering</p><p>Hai Duong City</p><p> </p></bio><email xlink:type="simple">khanhgq@thanhdong.edu.vn</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Университет науки и технологий МИСИС<country>Россия</country></aff><aff xml:lang="en">University of Science and Technology MISIS<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Государственный технический университет им. Ле Куй Дона<country>Вьетнам</country></aff><aff xml:lang="en">Le Quy Don Technical University<country>Viet Nam</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Университет Тхань Донг<country>Вьетнам</country></aff><aff xml:lang="en">Thanh Dong University<country>Viet Nam</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>18</day><month>04</month><year>2025</year></pub-date><volume>10</volume><issue>1</issue><fpage>67</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Rakhutin M.G., Tran V.H., Krivenko A.E., Giang Q.K., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Рахутин М.Г., Чан В.Х., Кривенко А.Е., Занг К.К.</copyright-holder><copyright-holder xml:lang="en">Rakhutin M.G., Tran V.H., Krivenko A.E., Giang Q.K.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://mst.misis.ru/jour/article/view/946">https://mst.misis.ru/jour/article/view/946</self-uri><abstract><p>During the operation of hydraulic excavators, the technical condition of pumps deteriorates due to wear, leading to increased internal clearances, fluid leakage, a reduction in volumetric efficiency, and higher energy losses, ultimately resulting in excessive fuel consumption. The objective of this study was to determine the optimal service life of pumps, taking into account the growing fuel overconsumption during operation. The following tasks were addressed: developing a mathematical model for pump ownership costs, incorporating progressive fuel overconsumption; designing an algorithm and conducting computer simulations using Simulink-Matlab; and assessing the increase in fuel consumption. The study examines the impact of the technical condition of the main hydraulic pumps on fuel overconsumption using the Komatsu PC2000-8 hydraulic excavator as a case study. Based on the proposed pump operation cost model, which accounts for the increase in fuel consumption over time, dependencies between fuel overconsumption and pump wear were established. Computer modeling was performed in Simulink-Matlab and Excel based on the developed calculation methodology and software algorithm. Relationships between the excavator's fuel overconsumption and the technical condition of the pumps were identified. A mathematical model for pump ownership costs is presented, taking into account the progressive fuel overconsumption during operation, along with the resulting equation for determining the optimal service life of pumps to minimize total costs, including pump acquisition and fuel expenses. This expression considers the technical condition of the main pumps, their rate of deterioration, fuel costs, and pump replacement costs. A fuel overconsumption indicator was introduced, defined as the ratio of the difference between actual fuel consumption per 1 m3 of excavated material and fuel consumption at nominal efficiency of the main pumps (nominal fuel consumption) to the nominal fuel consumption. The application of this criterion, in conjunction with the proposed equation for determining the optimal pump service life, allows for a data-driven selection of the critical wear threshold for the main pumps, reducing total ownership and fuel costs by up to 17%, depending on economic and mining-engineering conditions.</p></abstract><trans-abstract xml:lang="ru"><p>В процессе эксплуатации гидравлических экскаваторов вследствие износа изменяется техническое состояние насосов. Увеличиваются зазоры, переток жидкости, снижается объемный КПД, возрастают потери энергии, что приводит к перерасходу топлива. Целью работы являлось определение рационального срока эксплуатации насосов с учетом перерасхода топлива, который возрастает в процессе эксплуатации. Решены задачи: создание математической модели затрат на владение насосом с учетом перерасхода топлива, возрастающего в процессе эксплуатации, разработка алгоритма и компьютерного моделирования в программе Simulink-Matlab, оценка увеличения расхода топлива. В статье на примере гидравлического экскаватора Komatsu PC2000-8 показано влияние технического состояния главных насосов гидравлического экскаватора на перерасход топлива. На основе предлагаемой модели затрат на эксплуатацию насоса с учетом повышения расхода топлива в процессе эксплуатации получены зависимости перерасхода топлива от технического состояния насосов. По разработанным методике расчета и программному алгоритму выполнено компьютерное моделирование в программах Simulink-Matlab  и Excel. Получены зависимости перерасхода топлива гидравлического экскаватора от технического состояния насосов. Представлены математическая модель затрат на владение насосом с учетом перерасхода топлива, возрастающего в процессе эксплуатации, и полученное на ее основе выражение для определения рационального срока эксплуатации насосов для минимизации затрат на приобретение насосов и топлива, учитывающее техническое состояние главных насосов, скорость его изменения, стоимость топлива и замены насоса. Предложен показатель, характеризующий перерасход топлива, определяемый отношением разницы между фактическим расходом топлива на 1 м3 экскавируемой горной массы и расходом топлива при номинальных значениях КПД основных насосов (номинальным расходом) к номинальному расходу. Использование предлагаемого критерия совместно с выражением для определения рационального срока эксплуатации насосов позволит обоснованно выбирать значение предельного состояния основных насосов и уменьшить суммарные затраты на владение насосом и на расход топлива до 17 % в зависимости от экономических и горнотехнических факторов эксплуатации. с учетом экономических и горнотехнических факторов эксплуатации.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>горные машины</kwd><kwd>карьерный гидравлический экскаватор</kwd><kwd>техническое состояние насосов</kwd><kwd>гидравлика</kwd><kwd>насос</kwd><kwd>состояние</kwd><kwd>эксплуатация</kwd><kwd>моделирование</kwd><kwd>утечки</kwd><kwd>КПД</kwd><kwd>износ</kwd><kwd>затраты</kwd><kwd>алгоритм</kwd><kwd>расход</kwd><kwd>перерасход</kwd><kwd>рациональный срок</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mining machinery</kwd><kwd>hydraulic mining excavator</kwd><kwd>pump technical condition</kwd><kwd>hydraulics</kwd><kwd>pump</kwd><kwd>condition</kwd><kwd>operation</kwd><kwd>modeling</kwd><kwd>leakage</kwd><kwd>efficiency</kwd><kwd>wear</kwd><kwd>costs</kwd><kwd>algorithm</kwd><kwd>consumption</kwd><kwd>overconsumption</kwd><kwd>optimal service life</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Chen Y., Zhang J., Xu B. et al. 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