RU97111980A - DRILLING DRILL OF THE DRILLING MACHINE - Google Patents

Claims (1)

A drilling rig hydraulic actuator comprising a pump, a drill string rotary drive hydraulic motor, a drill string hydraulic feed drive, rotary drive and feed drive hydraulic control valves, safety valves, an oil tank and connecting lines, characterized in that the rotary drive hydraulic motor, a hydraulic feed drive and hydraulic control valves for rotator drives and feed mechanism are connected to the pump and oil tank by connecting lines been consistent, line connecting control valves drives the rotator and the feed mechanism is connected to the oil tank through the relief valve feeding the actuator, and the maximum pressure level in the actuator feeding mechanism related to the maximum pressure level in the actuator rotator while drilling dependence:

where p $\genfrac{}{}{0ex}{}{\text{max}}{\text{bp}}$ and p $\genfrac{}{}{0ex}{}{\text{max}}{\text{P}}$ - maximum pressure levels in the rotator and feed drives;
N _p and N _BP - maximum power levels of the rotator and feed drives (when drilling);
2. The hydraulic actuator according to claim 1, characterized in that a pump with a characteristic that provides a constant flow rate in the range of operating pressures and a decrease in flow rate to a minimum value at a maximum permissible load when drilling is used as a drive, and a line that is pressure when unscrewing the drilling stav, connected to the drain through the second safety valve.