How much is the salary of the apprentice of rotary drilling rig?

Five; The main winch of Dongfang rotary drilling rig training base is weak.

Mainly manifested in the lack of drill bit in construction. If the engine power, main pump pressure and brake opening pressure are normal during the inspection, it may be that the reducer is damaged. You can also judge whether the overflow valve at the motor end has overflow sound by listening to the sound. If there is sound, the overflow valve is out of order; If there is no sound, it can be judged that the reducer is damaged.

Six; Drill pipe falling off

This fault mainly occurs in winter, because the temperature of hydraulic oil is too low in winter, and the oil pressure builds slowly when the operating handle is switched, so the brake can't work at the moment when the handle stops. If this fault occurs in summer, check whether the brake control output oil pressure reducing valve and built-in shuttle valve, as well as the motor oil supply position and oil supply are normal. Seven; Fault diagnosis and elimination of hydraulic pump

1. The gear pump produces serious vibration and noise.

(1) The seal is not tight, and the inhaled air produces noise.

② Mechanical reasons (gear wear caused by dirt/machining quality problems/substandard coaxiality with coupling/damaged parts in pump)

③ Other reasons (filter clogging/high oil viscosity/large diameter of oil inlet and outlet/small axial assembly clearance of pump, burr on tooth profile)

2. The output flow of the pump is insufficient, and the pressure can't go up.

① The filter in the oil tank is blocked, and there is vacuum in the oil suction pipeline.

② The sliding joint between the end face of the pump and the front and rear covers is tightened, resulting in internal unloading.

(3) The oil temperature is too high, which leads to the decrease of oil viscosity.

④ The viscosity of the selected oil is too high or too low.

⑤ The pump body has casting defects such as sand holes and shrinkage cavities.

3. The pump rotates badly or bites to death.

① The axial clearance and radial clearance are small.

② There is dirt in the pump.

③ Assembly quality problem

④ poor coaxiality of coupling

⑤ The parts in the pump are not degaussed.

⑥ The outlet of working oil is blocked.

4. The pump body is very hot

① The oil viscosity is too high.

② The side plate, shaft sleeve and end face of the pump are seriously worn.

(3) The ambient temperature is high and the heat dissipation of the oil tank is poor.

5. Fault diagnosis and elimination of plunger pump

① Pump output flow is insufficient.

② Insufficient oil absorption.

(3) The pump leaks greatly.

④ The actual inclination angle of the pump swash plate is too small.

⑤ The pressure plate is damaged.

6. When the swash plate is at zero degree angle, the oil is discharged.

① The swashplate trunnion is worn, and the position of the controller is offset, loose or damaged.

7. Output flow fluctuation

① If the flow fluctuation is synchronous with the rotating speed, it can be considered that the plunger and the plunger hole, the slipper and the swash plate, the cylinder body and the oil distribution plate are damaged.

② Control the damage of the swash plate.

8. Abnormal output pressure

① Overflow valve problem: the output pressure does not rise/unidirectional.