Substantiation of use of the adjustable elastic linkage in a ripper of digging machine with energy accumulator

The ripper is a working equipment for digging with active vibration isolation system; it allows the excavation with minimal power consumption. The article discusses the dynamic model of a ripper with energy accumulator. Influence of elastic linkage, geometric parameters and mass of links of ripper equipment on the oscillation frequency of working body is analysed. Analytical dependence is obtained, that establishes the interrelation between energy dissipated in soil, parameters of mechanical system and motion modes. Joint analysis of constraints and equations of vibrational motion of ripper working body allows to choose a large group of parameters that characterizes a complex system: basic machine - ripper with energy accumulator - soil. Graphical analysis of elastic and inertial properties of accumulator (the potential energy carrier) leads to the conclusion that adjustable elastic linkage is the main parameter, that provides the matching mode of oscillation frequency of ripper working body and frequency of soil cleavage. The optimal geometric and mass parameters of working equipment are laid down; they determine the mode of excavation with minimal energy consumption, complying with the requirements for protection of operator and elements of basic machine against critical vibratory loads. The obtained analytical dependence clearly shows the complexity of the processes involved in interaction between ripper equipment and soil; these processes require further comprehensive research. The design features of a ripper with energy accumulator, included in the class of digging machines, united by the principle of circuit of dynamic loads on working equipment and soil, are protected by copyright certificates and patents.

vibration protection, dynamic vibration absorber, antiphase oscillations, energy accumulator, working equipment