Analysis of Self-oscillating Single-acting Hydro-impact System Operational Modes with Two Limiters of Striker Movement

Authors

  • Leonid V. Gorodilov N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia

DOI:

https://doi.org/10.13052/ijfp1439-9776.2023

Keywords:

hydro-impact system, reversing mode, strike power

Abstract

A new property of self-oscillating single-acting hydro-impact systems is considered in this paper – an ability to make strikes in forward and backward directions in presence of two limiters of striker movement without structural changes in device. Mathematical models are presented for system, which includes a flow rate source, a control valve, an impact unit (body frame, striker and spring), an energy accumulator and two limiters. Program for system operational modes (op-modes) simulation is developed and dynamics of specific typical device is numerically investigated. Theoretical oscillograms of its dynamic characteristics and dependencies of integral characteristics on source and impact device parameters are analyzed. At low flow rate multiimpact self-oscillating cycles are obtained, in which the nature of dynamics phenomenon repeats after several striker-limiters interactions. Increase of flow rate leads to single-impact working mode with forward direction of striker movement, then to transition to double-impact mode with forward and backward directions and, further, to single-impact mode with backward direction. Transition boundary points, in which system op-modes changes, are found. Results of this paper can be applied in development of reversible hydro-impact devices (with impacts in forward and backward directions) for mining and construction engineering.

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Author Biography

Leonid V. Gorodilov, N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia

Leonid V. Gorodilov was born in 1956 in Glazov, Russian Federation. He qualified as a specialist in the field of Physical processes of mining in the Moscow mining institute in 1979. Leonid V. Gorodilov in 1993 received a PhD degrees in Fluid mechanics, gas and plasma from the Institute of hydrodynamics SB RAS. In 2010, he received a Dr. of Engineering degrees in Mining machinery from the Institute of mining of SB RAS. Since 1985 he has been working at the Institute of mining SB RAS, currently he is the Head of the laboratory of Pulse systems modeling. Dr. L. Gorodilov is currently engaged in research in the field of hydraulic impact systems for mining and mechanics of impact destruction of rocks.

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Published

2019-11-20

How to Cite

Gorodilov, L. V. (2019). Analysis of Self-oscillating Single-acting Hydro-impact System Operational Modes with Two Limiters of Striker Movement. International Journal of Fluid Power, 20(2), 209–224. https://doi.org/10.13052/ijfp1439-9776.2023

Issue

2019: Vol20 Iss 2

Section

Original Article