#Rotary Drilling Rig# Today, SDLQ editor will show you how to solve the problem of LQR-130 rotary drilling rig suddenly not working during construction:
1. Fault phenomenon: An LQR-130 rotary drilling rig suddenly stopped working during construction. The operating handle did not work, but the engine was working. 2. Fault analysis: This fault occurred suddenly. It is likely that the pilot solenoid valve is not receiving power; or the pilot pump is not functioning, and no control oil enters the pilot control oil circuit, causing the entire machine to stop working. Alternatively, no power is supplied to the hydraulic power components - the various hydraulic pumps, which can also cause the entire machine to stop working. 3. Troubleshooting ideas: (1) The solenoid coil of the pilot solenoid valve in the circuit is not receiving power; (2) The pilot pump in the hydraulic part is damaged; (3) The connection plate between the engine and the pump in the mechanical part is faulty.#rotary drilling rig#
4. Troubleshooting process:
(1) When the pilot solenoid valve is energized, place a small screwdriver close to the solenoid valve. The small screwdriver is attracted by the magnetic field generated by the solenoid valve, and there is no problem with the circuit;
(2) Start the rotary drilling rig and find that the pressure gauge shows 0MPa. Stop the machine and remove the oil outlet pipe of the pilot pump. Then start the drilling rig and find that no pressure oil is flowing out. It may be that the pilot pump is not working;
(3) It is not certain that the pilot pump is faulty because the pressures of the three pressure gauges are all 0MPa and the main and auxiliary pumps have no pressure;
(4) Remove the oil outlet pipe on the auxiliary pump and start the drilling rig and find that the auxiliary pump also has no hydraulic oil pumping out. It is impossible for both the pilot pump and the auxiliary pump to fail suddenly at the same time;
(5) It is determined that the power transmission link is faulty. The connecting plate between the engine and the pump is faulty. After removing the connecting plate, it is found that the connecting plate gear ring is severely worn and the power cannot be effectively transmitted. Replace the connecting plate and the fault is eliminated. 5. Troubleshooting experience: When troubleshooting a rotary drilling rig, you must pay attention to details, starting from the electrical, hydraulic, and mechanical aspects, watch more, listen more, ask more, and think twice before acting.#rotary drilling rig#
