The work is devoted to the study of an adaptive hydraulic drive for tool feed of a mobile drilling rig. The analysis of the ways of regulation of the considered hydraulic systems is carried out, the criteria and parameters of their functioning are determined. As a result of the analysis, an original circuit design of an adaptive hydraulic drive was applied, where the tool is fed using an adjustable volumetric hydraulic motor with a hydraulic control loop, taking into account the changing load on the tool during drilling. By a computational experiment in the Matlab Simulink program, the parameters of the control loop devices are determined: a hydromechanical sensor and a hydraulic valve, on the basis of which the experimental setup is implemented. The performed multifactorial experiment made it possible to identify the processes in the original hydraulic circuit for controlling the hydraulic motor under various modes of tool loading. The results made it possible to determine the rational ranges of functioning of the hydromechanical system for a typical working cycle. The use of the developed research methods and their results makes it possible to reduce the time and money spent in the design of adaptive hydraulic systems of mobile technological machines, in the creation of prototypes and in the commissioning.

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The article investigates a hydro-mechanical system of regular feed and principal movement of a production machine (as illustrated by a mobile drilling rig).We study the behavior of a dynamic hydro-mechanical system under varying external processes of well drilling. The task of maintaining the optimal drilling process is solved by using an original design (multivariate sensor, additional hydraulic lines linking the principal movement and the tool-feeding movement). Travel time characteristics and dynamic behavior of the regular feed are provided with one power plant. A dual-mass mathematical model of a dynamic multi-mass hydro-mechanical system (MHS) is proposed in Matlab Simulink software environment. The model contains an analytical description of mechanical, hydraulic and control subsystems and is implemented by subsequent complications of the basic model starting from a single-mass linear model to a nonlinear dual- mass one with active submodels of all subsystems. The application of the model makes it possible to study the duty cycle of a multi-branch MHS, while maintaining the consistency of the results of solutions that are getting increasingly complicated.