До дослідження об’ємного гідропривода обертання автобетонозмішувача

The mathematical model of the  hydraulic fluid power  of rotation of the drum of the concrete mixer which consists of algorithms of static and dynamic calculations is considered. The calculation methods allow to find the displacement  of the hydraulic motor and the pump operating in a closed circuit of the working fluid circulation, and to establish the influence on the pressure fluctuations in the hydraulic drive depending on the rate of change of the axial-piston pump supply. Simulation of the dynamics of the three-dimensional hydraulic  fluid power  fluid power  was performed by setting the variable feed pump performed using the package VisSim-map in the start mode, the established mode and the brake mode. The automation of the pump supply modes is performed through the use of a  displacement  control with electrical proportional control. It is possible to set the minimum possible time to increase and decrease the supply of the pump, which limits the maximum pressure during start-up and operation of the hydraulic drive without cavitation, taking into account the moment of inertia and compressibility of the working fluid.