ANALYSIS OF TESTING METHODS FOR VOLUME HYDRAULIC MACHINES AND HYDRAULIC TRANSMISSIONS

Purpose. Creation of recommendations for the use of testing methods for volumetric hydraulic machines and hydraulic drives for domestic specialists in the field of mechanical engineering of hydronic vehicles and technological equipment, as well as in the education of students. Research methodology. Analysis of modern hydraulic schematic diagrams and testing methods for volumetric hydraulic machines and hydraulic drives to solve the problems of diagnosing the technical condition, determining volumetric and hydromechanical power losses and resource tests based on accumulated domestic and foreign experience. At the same time, the ISO 4409 standard introduced in Ukraine for bench tests of hydraulic machines and hydraulic drives, as well as test methods that are practically used in domestic production and in research centers, are considered. To adapt the new standard, the hydraulic schematic diagrams are modified with the necessary designations and standardized terms are applied according to DSTU 3455. From the point of view of researching power losses in hydraulic machines, conducting resource tests, as well as diagnostics of post-repair tests, the methods that have not been included in the ISO 4409 standard are presented, but they can be useful in terms of improving research, energy saving and reducing the nomenclature of bench equipment. The results of the analysis of the methods of testing hydraulic machines and hydraulic drives can be useful for specialists in the national economy who are engaged in the design of hydraulic drives, new pumps and hydraulic motors and their production, as well as for master's students studying the discipline ''Design and testing of hydraulic drives'' in the specialty ''Industrial mechanical engineering''.