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Information × Registration Number 0225U000683, (0123U101983) , R & D reports Title Study of the influence of design factors on the reliability of hydraulic transmissions of vehicles popup.stage_title Дослідження впливу конструктивних факторів на надійність гідравлічних трансмісій транспортних засобів Head Meliantsov Petro T., к.т.н. Registration Date 15-01-2025 Organization Ukrainian State University of Science and Technologies popup.description1 The idea of the work is to increase the maintainability and operational durability of axial-piston hydraulic machines of hydraulic transmissions of vehicles by introducing structural changes based on the application of methods of calculation and design of axial-piston hydraulic machines, as well as the use of parts made of polymer materials in the structures of aggregates, which will also reduce the metal consumption of hydraulic units and will increase the sensitivity of adjustable axial-piston hydraulic machines. The purpose of the project: - determination of empirical distribution parameters and quantitative reliability characteristics of hydraulic transmission units; - definition of the main and additional indicators of maintainability of axial-piston hydraulic machines; - development of constructive solutions regarding parts and connections of axial-piston hydraulic machines; - justification of the choice of polymer material as a structural material. popup.description2 The purpose of the work is to increase the maintainability and operational durability of axial-piston hydraulic machines of hydraulic transmissions of vehicles by introducing structural changes based on the application of calculation and design methods for axial-piston hydraulic machines, as well as the use of parts made of polymer materials in the structures of units, which will also reduce the metal content of hydraulic units and increase the sensitivity of adjustable axial-piston hydraulic machines. Main results of the work. Expansion of theoretical studies to improve the design of parts of pumping units of axial-piston hydraulic machines that limit their resource under operating conditions. Graphical-analytical modeling of the loss of performance of transmission hydraulic drives is carried out and the relationship between the structural and functional parameters of the technical condition is determined. The empirical distribution of the reliability of units and the importance of structural parameters that affect the performance of the transmission are determined. The functional dependence between the structural parameters of the technical condition of the mating parts of the pumping unit and volumetric and mechanical losses is analytically found. Methods for designing components of axial-piston hydraulic pumps are proposed, which allow reducing power losses in pumps compared to the achieved level by 30...40% and overall dimensions by 10...15%. Structural improvements to the block sleeve with an elastic-damping element and unloading chambers reduce contact loads and their duration between the sleeve and the plunger. As a result of the implementation of the topic, new designs of parts using elastomers and polymer materials have been developed. A method for assessing the maintainability of parts of the end distribution of the working fluid flow for axial-piston hydraulic machines NP-90 and MP-90 has been developed. Product Description popup.authors Losikov Oleksandr M. Malich Mykola H. Nazarets Viktor S. Sydorenko Viktor K. popup.nrat_date 2025-01-15 Close