Design and evaluation of operational characteristics of energy efficient crane-manipulator in-stallation for mobile transport-technological machines

The article describes the design and features of the original energy-efficient manipulation system for loading and unloading operations using a mobile transport and technological machine. The design feature of this manipulation system is the replacement of the hydraulic mechanism of the rotary motion of the most loaded link with the mechanism of translational motion. This made it possible to solve two important tasks: to significantly reduce the magnitude of the operational load that the power cylinder needs to overcome in the process of moving the link of the manipulation system, as well as to ensure the constancy of the magnitude of the operational load throughout the entire vertical movement of the transported cargo. In relation to the design and technical characteristics of the manipulation system of a real mobile machine, a comparative analysis was made of the energy efficiency of operating the crane-manipulator of the considered and traditional design. The results of the analysis showed that the operation of the manipulation system of the proposed design is much more economical. This is due to a decrease in the power of the hydraulic drive of the mobile machine due to the use of a power cylinder of a smaller size, which requires less volumetric flow rate of the working fluid. In particular, for the considered mobile machine, a possible reduction in pumping unit capacity may be more than 30%.