Dependent twin-engine hydraulic drive of the drilling rig with a mechano-hydraulic variable pump control circuit

Abstract

Abstract 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.