Quarry drilling rig feed drive dynamic properties

Purpose. The dynamic properties of the control object of the feed drive system to the face determination, on the basis of which to establish the qualitative and quantitative influence of elastic hydro-mechanical links on dynamic processes. The methods. When conducting research, the apparatus of mathematical analysis of ordinary inhomogeneous differential equations was used and the Laplace integral transformation was performed, which allowed the analysis to be carried out based on the solution of linear algebraic equations and the representation of dynamic links in the form of transfer functions, which made it possible to quantitatively determine the influence of the parameters of the control object on the quality of transient processes. Findings. The analysis of the dynamic properties of the hydro-mechanical system is made, as an object of regulation, allows us to reasonably formulate the requirements for the control system of the feed drive and lowering and lifting operations, in which it is necessary to provide for monitoring the current and limit values of technological parameters in the process of moving the drilling rig, namely the pressure in the hydraulic system, the frequency of rotation of the hydraulic motor shaft and the linear speed of moving the rig, as well as the influence of additional fractional-rational functions on the quality of control of the control system. The originality. The dynamic characteristics of hydro-mechanical links are established, which are based on the fundamental relationships: balances of lubricant consumption, moments and powers on the shaft of the hydromotor. A mathematical model of the control object is obtained and analyzed using standard dynamic links with known characteristics, which allow synthesizing an automatic control system for the drive of lowering and lifting operations and the supply of the supply. Practical implementation. From the analysis of the obtained mathematical model of the control object of the drive for the supply of lowering and lifting operations, it was established that in the control object, in order to implement a rational method of controlling the drilling process with maintaining the power flow in the rock destruction zone at a constant level, it is necessary to control, in addition to the traditional coordinates - torque and engine speed, also technological coordinates – pressure in the hydraulic system, the speed of rotation of the hydraulic motor shaft and the linear speed of moving the post, which requires the appropriate inclusion of control loops.