Estimate of Blow Frequency Range for an Air Drill Hammer with a Ring-Shaped Elastic Valve in Backstroke Exhaust Line
V. V. CHERVOV, B. N. SMOLYANITSKY, I. V. TISHCHENKO
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: Пневмомолот, упругий клапан, расход воздуха, частота ударов, энергия удара, air drill hammer, elastic valve, air flow rate, blow frequency, blow energy
Abstract
The authors report and discuss the experimental results on an air drill hammer with an elastic valve installed in the backstroke exhaust line for mechanical closing. It is approved that such air hammer is capable to ensure the wanted blow capacity at fixed blow energy by varying blow frequency through adjustment of cross section choke coupling the backstroke and front stoke chambers of the hammer. With larger cross section of choke coupling, the maximum blow frequency is achieved and remains the same later on.
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