DESIGN PARAMETERS DETERMINATION OF AN ANNULAR ELASTIC VALVE MANAGING THE INTAKE OF ENERGY INTO THE WORKING CHAMBER OF PNEUMATIC PERCUSSION MACHINES
Describes one of the promising shut-off and control elements of the air distribution system of pneumatic shock machines-the annular elastic valve. The unfavorable combination of factors preventing the valve operation is considered. The method of calculation the elastic valve, controlling the energy carrier inlet to the working chamber of the pneumatic shock machine is given, which allows determining the main geometric dimensions of the valve at the design stage, ensuring a stable self-oscillating cycle of the pneumatic shock machine with specified energy characteristics. This technique allows to determine the basic geometric dimensions of the valve device at the design stage, which allows to ensure a stable self-oscillating cycle of a pneumatic shock machine with the given energy characteristics. The developed technique was used to modernize the air distribution system of the down-hole air hammer. In-situ tests of the sample confirmed the increase in energy indicators compared to the serial air hammer.