05. Velichko S.A., Chumakov P.V., Kolomeychenko A.V. Assessment of Technical Condition of C Series Power Hydraulic Cylinders of Mounted Hydraulic Systems of Tractors.

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UDK 621.225:631.3

DOI: 10.15507/2658-4123.029.201903.396-413

Assessment of Technical Condition of C Series Power Hydraulic Cylinders of Mounted Hydraulic Systems of Tractors

Sergey A. Velichko
Senior Lecturer of Technical Service Machines Chair, Institute of Mechanics and Power Engineering, National Research Mordovia State University (5 Rossiyskaya St., Saransk 430904, Russia), Ph.D. (Engineering), ResearcherID: G-9021-2018, ORCID: https://orcid.org/0000-0001-6254-5733, This email address is being protected from spambots. You need JavaScript enabled to view it.

Pavel V. Chumakov
Senior Lecturer of Technical Service Machines Chair, Institute of Mechanics and Power Engineering, National Research Mordovia State University (5 Rossiyskaya St., Saransk 430904, Russia), Ph.D. (Engineering), ResearcherID: G-8320-2018, ORCID: https://orcid.org/0000-0002-8504-5907, This email address is being protected from spambots. You need JavaScript enabled to view it.

Alexander V. Kolomeychenko,
Head of the Chair of Reliability and Repair of Machines, Orel State Agrarian University (69 Generala Rodina St., Orel 302019, Russia), D.Sc. (Engineering), Professor, ResearcherID: D-6053-2019, ORCID: https://orcid.org/0000-0002-3865-4486, This email address is being protected from spambots. You need JavaScript enabled to view it.

Introduction. The existing methods of assessing the technical condition of power hydraulic cylinders do not allow one to conclude about the need to restore worn surfaces of parts. The data on limit values of wear of parts (wear and tear value at which a decision is made to repair) in technical requirements to overhaul and other technical documentation of hydraulic cylinders are not currently available. The aim of the study is to determine limit values of wear of working surfaces of hydraulic cylinder parts of C series.
Materials and Methods.To assess the technical condition of hydraulic cylinders used, the authors developed a device on the basis of the stand KI-28097M-GOSNITI, equipped with an independent hydraulic station and load hydraulic cylinder, at which bench tests were carried out in the operation of С series hydraulic cylinders to determine overall efficiency values.
Results. Results of bench and micrometer tests of the former hydraulic cylinders of the С series (С75/30, С90/30, С100/40) are presented. The regression model of the relationship between total efficiency of C series hydraulic cylinders (С75/30, С90/30, С100/40) and wear of working surfaces of parts was obtained. According to this regression model obtained using the method of steep ascent, limit values of wear of the working surfaces of C series hydraulic cylinder parts (С75/30, С90/30, С100/40) were determined.
Discussion and Conclusion. 19,5 % of hydraulic cylinders of С series (С75/30, С90/30, С100/40) were operated in an out-of-limit condition. In case of technical service companies carrying out the input control of to-be-repaired hydraulic cylinders, limit values of wear for hydraulic cylinder surfaces, determined by the method of steep ascent, allow for making proper decisions on the need of their restoration.

Keywords: hydraulic cylinder, efficiency factor, technical condition, micrometer, wear

Funding: The publication was prepared with the financial support of the Ministry of Education of Russia, State Assignment: Competency Development, Project No. 11.3416.2017/4.6: Development of Technologies and Means of Enhancing Durability of Parts, Components, Assemblies of Machinery and Equipment by Creating Nanostructured Coatings by Concentrated Energy Sources.

For citation: Velichko S.A., Chumakov P.V., Kolomeychenko A.V. Assessment of Technical Condition of C Series Power Hydraulic Cylinders of Mounted Hydraulic Systems of Tractors. Inzhenerernyye tekhnologii i sistemy = Engineering Technologies and Systems. 2019; 29(3):396-413. DOI: https://doi.org/10.15507/2658-4123.029.201903.396-413

Contribution of the authors: S. A. Velichko – scientific guidance, formulation of the research problem, statistical data processing, obtaining a regression model of the overall efficiency of hydraulic cylinders with wear of the working surfaces of the parts, defense of the doctoral thesis with scientific results presented in this article; P. V. Chumakov – analysis of literary data, development of techniques, experimental studies; A. V. Kolomeychenko – accumulation of statistical data, analysis of the regression model and finalization the text.

All authors has read and approved the final manuscript.

Received 18.03.2019; revised 10.05.2019; published online 30.09.2019

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