COLUMN BORING GEAR WITH ELECTRICAL DRIVE Russian patent published in 2004 - IPC

FIELD: mining industry. SUBSTANCE: device has pump and, in the lower body of column pipe, a crown, male- accepting pipe, which is connected to mud pipe, in which filter and mud-lifting pipe are located, shaft with electrical drive rotor fixed on it, stator of which drive is located in the upper body of column pipe, to the upper part of which a cable lock is fixed. Gear is equipped with a control system connected to electrical drive, and with a resilient member in rigid connection with cable lock on one side and with electrical drive rotor on another. Resilient member of lower body is capable of turning relative to upper body. Pump is fixed through a reducer on mud pipe in lower body of column pipe. EFFECT: simplified construction of boring gear due to removal of reaction torque. 3 dwg