BASIC APPROACHES TO ANALYSIS OF RELATED PHYSICAL-MECHANICAL PROCESSES AND STATES IN ELEMENTS OF RADIAL HYDRAULIC TRANSMISSIONS

This work defines general methodological approaches to the analysis of interrelated physical and mechanical processes and states in the elements of radial-piston hydraulic transmissions. The key characteristics of these approaches are, firstly, a generalized parametric description of various processes and states in hydraulic transmissions, and secondly, the construction of integrated modeling problems of these interconnected physical processes. Such integration differs from the traditional approach, which involves the sequential solution of separate independent problems, which allows to create more corresponding mathematical models of work processes in hydraulic transmissions and to substantiate progressive technical solutions. In particular, there were a number of processes and states considered in the complex and interaction. Special attention is devoted to the kinematics and dynamics of movement of hydraulic transmission elements. Also important is the analysis of contact interaction and the stress-strain state of hydraulic transmission elements. Among the determinant one’s – the processes of hydrodynamics of the working fluid in the working volumes of hydraulic transmissions. In the general description of the mathematical models of the processes and states under study in hydraulic transmissions, the main state variables and factors were determined, which serve as the basis for the forming of more detailed models within the framework of further research. The key dimensions, that used in the calculation models of processes and states in hydraulic transmissions were evaluated, which makes it possible to classify them according to the degree of significance. It has been established that neglecting individual stages of the research can lead to significant errors in the calculation results compared to the behavior of real objects. Thus, the developed comprehensive model of processes and states in the elements of radial-piston transmissions, on the one hand, is sufficiently complete, as it encompasses all significant aspects of the functioning of these transmissions. On the other hand, it is impractical to remove individual parts from it. Therefore, the applied approach made it possible to build a basic mathematical model of processes and states, balanced by the criteria of adequacy and complexity.