Operation Factors of Pneumatic Hammer with Reduced Volume Front Chamber
I. V. Tishchenko, V. V. Chervov
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Pneumatic hammer, impact capacity, elastic valve, compressed air pressure, impact frequency, energy carrier flow rate, impact energy
Abstract
The methods of increasing energy and operation parameters of a pneumatic hammer with an air distribution valve are reviewed. The algorithm of restructuring impact capacity of a pneumatic hammer with an elastic ring valve in the back stroke chamber of the hammer piston is proposed: it is suggested to use a feed source with an increased-pressure energy carrier. The algorithm was employed in designing and manufacturing a prototype model of the hammer. The actual operation factors of the prototype model are determined on a lab-scale bench tester: impact energy, impact frequency, energy carrier flow rate. After processing of indicator pressure charts, compressed air flow rate per unit energy output is assessed.
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