TURBO-DRILL Russian patent published in 1994 - IPC

FIELD: mining. SUBSTANCE: turbo-drill has body, shaft, turbine stages in form of stators and rotors with blades and units of turbine fastening to shaft and to turbo-drill body. For improvement of technical characteristics turbo-drill is provided with blade hydraulic brake, made in form of rotors secured on blades and/or stators of section partitions, forming closed hollows with blades. Number of partitions in rotors and stators is same or different, and radial axles of partitions are disposed in same longitudinal plane of turbo-drill. Fastening units of turbines are made in form of bushings with slots and locks installed in body and on shaft. EFFECT: higher efficiency. 2 dwg