zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2021-87-1-52-60zldm-1351Research ArticleМЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬMECHANICAL TESTING METHODSУскоренные испытания пар трения торцевых уплотнений из композиционного материала системы TiC – SiCAccelerated testing of the friction pairs of mechanical seals made of composite material of the TiC – SiC systemСомовО. В.SomovO. V.

Олег Васильевич Сомов

614013, г. Пермь, ул. Профессора Поздеева, д. 6

Oleg V. Somov

6, ul. Prof. Pozdeeva, Perm, 614013

ovsomov@mail.ruКаченюкМ. Н.KachenyukM. N.

Максим Николаевич Каченюк

614013, г. Пермь, ул. Профессора Поздеева, д. 6

Maxim N. Kachenyuk

6, ul. Prof. Pozdeeva, Perm, 614013

СметкинА. А.SmetkinA. A.

Андрей Алексеевич Сметкин

614013, г. Пермь, ул. Профессора Поздеева, д. 6

Andrey A. Smetkin

6, ul. Prof. Pozdeeva, Perm, 614013

ОглезневаС. А.OgleznevaS. A.

Светлана Аркадьевна Оглезнева

614013, г. Пермь, ул. Профессора Поздеева, д. 6

Svetlana A. Oglezneva

6, ul. Prof. Pozdeeva, Perm, 614013

ФГБОУ ПО «Пермский национальный исследовательский политехнический университет»РоссияFederal State Budgetary Educational Institution of Higher Education «Perm National Research Polytechnic University»Russian Federation2021190120218715260Copyright © Сомов О.В., Каченюк М.Н., Сметкин А.А., Оглезнева С.А., 20212021Сомов О.В., Каченюк М.Н., Сметкин А.А., Оглезнева С.А.Somov O.V., Kachenyuk M.N., Smetkin A.A., Oglezneva S.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/1351

Новые износостойкие материалы, применяемые в парах трения, разрабатывают в целях повышения надежности и безотказности их работы при эксплуатации, снижения экологической нагрузки и сокращения энергозатрат в технологических процессах изготовления. Одним из перспективных функциональных материалов для изготовления прочных и износостойких деталей и изделий, подвергающихся интенсивному износу в процессе эксплуатации, является порошковый композит системы TiC – SiC, получаемый искровым плазменным спеканием (ИПС). ИПС — энергосберегающий способ, альтернативный горячему прессованию. Он экологически безопаснее производства серийных пар трения для тракторостроения из свинцово-графитовой композиции НАМИ ГС-ТАФ-40. По эскизам серийной пары трения торцевого уплотнения центробежного насоса 16-08-140СП системы охлаждения дизеля Д-180 трактора Т10 изготавливали опытные образцы пар трения из порошкового материала системы TiC – SiC с применением технологии ИПС. Цель работы — проведение ускоренных стендовых испытаний опытных пар трения. Испытания проводили на оборудовании модульного блока для испытаний торцевых уплотнений к УСУ «Климат». Методика ускоренных испытаний предусматривала имитацию эксплуатационных испытаний опытных пар трения торцевых уплотнений центробежных насосов системы охлаждения ДВС с ускорением в 2,0 – 2,5 раза. Критерием применимости и оценки результатов ускоренных испытаний опытных пар трения являлось сходство температурных режимов работы уплотнения водяного насоса и усилия сжатия колец в паре трения в условиях реальной эксплуатации дизеля с режимами ускоренных испытаний при увеличенной частоте вращения вала центробежного водяного насоса. За основу оценки безотказности и долговечности объектов испытаний принимали путь, пройденный точкой среднего радиуса «пояска касания» рабочих поверхностей колец с учетом коэффициента ускорения испытаний в 2,0 – 2,5 раза. При ускоренных испытаниях проводили учет всех параметров испытаний, визуальный осмотр испытательного оборудования и торцевого уплотнения. Износостойкость опытных пар трения определяли по изменению массы, проводя промежуточные замеры величин износа колец через 100 и 200 ч испытаний. Ускоренные стендовые испытания показали, что пара трения с деталями из материала на основе TiC – SiC повышает ресурс работы торцевого уплотнения центробежного насоса системы охлаждения дизеля Д180 не менее чем в 1,5 раза.

Novel wear-resistant materials used in friction pairs are being developed to increase their reliability and failure-free performance in operation, reduce the environmental load and energy consumption in manufacturing processes. One of the promising functional materials for manufacturing durable and wear-resistant parts and products that undergo intensive wear in operation is a powder material of the TiC – SiC system obtained by spark plasma sintering (SPS). SPS is an energy-efficient alternative to hot pressing and environmentally-friendly procedure compared to that used in manufacturing serial friction pairs from the lead-graphite composition NAMI GS-TAF-40 for tractor industry. Prototype friction pairs made of the powder material of the TiC – SiC system have been manufactured by SPS technology using sketches of a serial friction pair of the mechanical seal of a centrifugal pump 16-08-140SP of the cooling system of D-180 diesel engine developed for a T10 tractor. The goal of the study is accelerated bench testing of the obtained experimental friction pairs. The tests were carried out on the equipment of a modular block for testing mechanical seals designed for the USI «Climate». The method of accelerated testing provided simulation of the operational tests of experimental friction pairs of mechanical seals of centrifugal pumps of the cooling system of an internal combustion engine with a 2.0 – 2.5-fold acceleration. The criterion for the applicability and evaluation of the results of accelerated tests of experimental friction pairs was the similarity of temperature conditions of the water pump seal and the compression forces of the rings in the friction pair under real diesel operation and the accelerated test modes for the increased rotational speed of the centrifugal water pump shaft. A path traveled by the point of the average radius of the «contact line of touch» of the working surfaces of the rings with allowance for test acceleration coefficient (2.0 – 2.5) was taken as a basis for assessing the reliability and durability of test objects. During accelerated testing, all the test parameters were taken into account in addition to visual inspection of the test equipment and the mechanical seal. The wear resistance of the experimental friction pairs was determined by change in the mass through intermediate measurements of the ring wear after 100 and 200 hours of testing. Accelerated bench tests revealed that a friction pair with parts made of a TiC – SiC-based composite material will provide at least 1.5- fold increase in the service life of the mechanical seal of the centrifugal pump of a D180 diesel cooling system.

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The authors declare that there are no conflicts of interest present.