Improving DTH Air Hammer Efficiency through Optimization of Shapes of Colliding Parts
I. A. ZHUKOV1, B. N. SMOLYANITSKY2,3, V. V. TIMONIN2
1Siberian State Industrial University, Novokuznetsk, 654007 Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
3Siberian State Transport University, Novosibirsk, 630049 Russia
Keywords: пневмоударник, боек, удар, импульс, горная порода, разрушение, аir hammer drill, hammering tool, impact, rock, breakage
Abstract
Design development of DTH air hammers is discussed with a view to increasing efficiency of rock drilling. The problem is handled by making hammering tool with curvilinear frees surfaces which are in no contact with the hammer body. This ensures generation of rock-breaking impact at the minimum energy input. New designs of hammering tools are developed for DTH air hammer models PP110EN and PP110NK designed at the Institute of Mining, SB RAS. Experiments prove that selection of rational shape of hammering tools allows improving performance of DTH air hammers by 15% at the average.
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