Remote Impact Frequency Control of Air Hammers with Power Closure of Elastic Valve
I. V. Tishchenko, V. V. Chervov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
Keywords: Soil, air hammer, impact unit, elastic valve, power structure, impact frequency, impact impulse energy, smooth adjustment, control unit
Abstract
It is important to enable remote control of duty cycle of air hammers via external distributors meant to set impact frequency. A new general layout is developed for the air-driven impact impulse generator with smooth adjustment of impact frequency at constant energy in driving construction elements in soil. The experimental model of the machine is designed and tested. Based on the analysis of the impulse indicator diagrams of the machine duty cycle, the impact frequency is correlated with the piston choke cross-section for three configurations of the control unit. The impact frequency control limits are found.
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