Experimental estimate of power variation range of pneumatic hammer with mechanical locking of elastic valve

Resumo

Under discussion is the experimental estimate of an actual power variation range of pneumatic hammer with a ring-type elastic valve arranged in exhaust unit of back-drive cell in order to lock mechanically this cell until exhaust stroke at various values of the hammer travel. The variation ranges of the valve channel cross-section are found to ensure sustained operation of the pneumatic hammer and the minimized air flow rate irrespective of the hammer weight and position (vertical or horizontal) and the ratio of the hammer power-stroke to the hammer power-stroke cell diameter.