HYDRAULIC DRILLING MACHINE

摘要

PCT No. PCT/SU89/00095 Sec. 371 Date Mar. 2, 1990 Sec. 102(e) Date Mar. 2, 1990 PCT Filed Apr. 14, 1989 PCT Pub. No. WO89/11022 PCT Pub. Date Nov. 16, 1989.A hydraulic drilling machine comprises a drill tool (1) connected to a hydraulic motor (3), a hydraulic percussive mechanism (4) connected via a hydraulic distributor (15) to a hydraulic pressure line (11) and to a hydraulic discharge line (21), and a means (16) for sucking the liquid from the working chamber of the hydraulic percussive mechanism (4) during its idle stroke. The means (16) includes a mixing chamber (17) connected to the discharge line of the hydraulic percussive mechanism, an ejector (18) connected to the discharge line of the hydraulic motor (3), and a diffuser (19) connected to the hydraulic discharge line (21) and accommodating a nozzle of the ejector (18).