Selecting Parameters Of Air-Percussion Tunneling Facility

The paper discusses vibratory displacement of two-mass vibrating system with air-powered impact force generator. In the first stage of studies, the effect of air leakage between chambers on efficiency of the impact force generator in percussion pricking and ramming, with much short travel of the body of the generator than its piston is analyzed. In the second stage, the influence of clearances on the rate of horizontal self-displacement of the vibrating system with impact force generator is examined at the proportional travels of the body and piston. The effect exerted by compressed air leaks between the work chambers in clearances of swivel joints is evaluated. The research results can be used in design of special pneumatic percussion drive for suction headers.