Methodology for the Hydraulic Drive Design Based on the Application of the Systems Analysis

When employing the known theoretical dependences, intended for the calculation of parameters of volume of the working chamber of the pump, motor and diameter of the cylinder sleeve under condition of using the same input and output data, we identified a significant discrepancy between the obtained calculated results. The need to eliminate the differences that we detected necessitated additional theoretical research.Theoretical studies of the design stage of hydraulic drive as the object of research are based on the application of the systems approach. Hydraulic drive is represented as a complex system, composed in the form of two or more subsystems that are functionally interconnected. Thus, one of the subsystems in the designed hydraulic drive consists of a pump and an oil tank. The second subsystem consists of a hydroallocator, pipelines and hydraulic engine with the function of translational or rotational motion, that is, consists of a hydraulic cylinder or a hydraulic engine.By the results of conducted theoretical research, we proposed a sequence for calculating the parameters of basic elements of hydraulic drive. This sequence includes the calculation of parameters of volume of the working chamber of the pump, motor and diameter of cylinder sleeve followed by the selection of technical specification or standardized magnitudes for each element of the hydraulic drive. Results of the calculation of parameters of the basic elements of hydraulic drive according to the performed research, relative to the known ones, are approximately in between them. Based on this, we may conclude that the research results obtained are new and provide for a more accurate selection of elements for the hydraulic drive during its design.When designing other elements of the hydraulic drive, the calculation and selection of the standardized parameters coincide with the known technique. The application of the proposed methodology contributes to the creation of modern hydraulic drive. Such hydraulic drive will match the assigned initial conditions, accepted in the course of its design