The rotary drilling rig's power head outputs enormous torque to enable drilling.#rig mounted truck#
Due to varying geological conditions and different operating procedures, the power head operates under high load, impact, and vibration conditions for extended periods, making it a frequent source of failure.
Power head failures can be broadly categorized into three types:
Low speed, insufficient torque, and no rotation. Low speed: Flow rate determines speed, so low power head speed is caused by flow rate issues. First, operate other functions to check the overall machine operation. If other functions are normal but the power head speed is low, the fault lies in the power head. The power head hydraulic motor is a variable displacement motor; if the motor displacement is faulty (too large displacement), it will lead to insufficient flow and low speed.
Insufficient torque: Pressure determines torque, so insufficient power head torque is caused by pressure issues. Check the overall machine operation. If other functions have normal pressure, the main pump is normal, indicating the fault lies in the power head. Check and adjust the power head relief valve.
Power head not rotating: Currently, most domestically produced drilling rigs are equipped with single-speed reducers (without high-speed soil throwing), so the hydraulic motor and large gear ring are rigidly connected. If the power head does not rotate, check the hydraulic system first. The most direct method is to lift the power head motor with the oil pipe and check if it rotates normally. If the motor rotates normally, it indicates a mechanical fault. Check the planetary reducer, input shaft, large gear ring and hub connection bolts, hub and sleeve connection bolts, etc.#rig mounted truck#
