ADAPTIVE MACHINE OF ROTARY DRILLING Russian patent published in 2013 - IPC E21B3/00 E21B19/86 

FIELD: mining.

SUBSTANCE: machine comprises a hydraulic motor of rotation, a hydraulic cylinder of supply, discharge and drain manifolds connected to an oil station, controlled throttles, hydraulic distributors. The hydraulic motor of rotation and the hydraulic cylinder of supply are connected to the discharge manifold in series, so that the hydraulic line from the outlet of the hydraulic motor of rotation is connected to the piston cavity of the hydraulic cylinder of supply via a three-way hydraulic distributor and with an entry into the first controlled throttle, the outlet from which is connected with the drain manifold, and the steam cavity of the hydraulic cylinder of supply is connected with the drain manifold via the second controlled throttle and the three-way hydraulic distributor. Into a hydraulic line between the discharge manifold of the inlet into the hydraulic motor of rotation and the inlet to the stem cavity of the hydraulic cylinder of supply there is the third controlled throttle.

EFFECT: invention provides for automatic adjustment of feed force depending on the torque of resistance to rotation and provides for automatic adjustment of a machine for drilling mode, close to the optimal one, maximum efficiency and automatic protection against overloads by rotation torque.

2 dwg