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Journal of Mining Sciences

2020 year, number 6

Basic Properties of One-Way Action Hydraulic Percussion System with Two Piston Arresters

L. V. Gorodilov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: hydraulic percussion system, limit cycle, mathematical model, similarity criteria, output characteristics, reversing duty, percussion power


The author presents the mathematical model of an autooscillating one-way action and positive-displacement system with two piston arresters. The dynamic criteria of similarity are determined, including: stiffness ratio of springs of the accumulator and percussion assembly; proportional value of the ratio between potential energy of the accumulator and kinetic energy of the piston at the preset parameters of power source; dimensionless coordinates of the piston when the positions of the distributor and the second arrester of the piston, as well as the pre-tension of the spring between the piston and the percussion assembly housing change; velocity recovery coefficient of the piston. Numerical calculations are performed in the space of the similarity criteria. The nomograms of isolines of the integral output parameters of the system and the oscillograms of dynamic characteristics are plotted. Dynamics of the system is analyzed, and its behavioral features are revealed in a wide range of input parameters. In the space of the similarity criteria, the boundaries are determined for the domains of single-blow, double-blow and multi-blow limit cycles.