| 摘要 |
<p>Percussion oleodynamic machine, comprising a body (1) , at least a high pressure oil-nitrogen accumulator (2) , at least a slide type valve (7) , with a low pressure control throttle (100) , a plurality of pushing volumes of the moving parts, a plurality of feeding and discharge circuits, with related inlet and outlet ports, at least a demolisher tool (10) , wherein said slide valve (7) is an on-off one; wherein there are two different hitting tools (3, 4) : while moving downwards, having different inertia, said masses are separated by a high pressure oil volume, because of a pilot throttle (16) ; and wherein there is a start throttle (24) which pressurizes the pushing volume.</p> |
