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1. Three daily inspections are required:
1) Before working, check whether the fastening connection of each part of the drilling rig is reliable;
2) During the work, it is necessary to comprehensively observe whether there is oil leakage, water leakage, air leakage, electricity leakage, etc.;
3) After get off work and shutdown, it is necessary to comprehensively check whether there are loose screws that need to be tightened, and replenish oil and water.
In short, daily maintenance should be done: cleaning, lubrication, adjustment, and tightening.
2. Maintenance should be timely to keep it in good operating condition
For hydraulic machinery that fails, the cause of the failure should first be identified. Common faults include external leakage and internal leakage of the hydraulic cylinder. External leakage is intuitive and obvious, and internal leakage should be judged by experience. The cylinder is weak in extension, and the speed of the closing action of the cylinder. After working for half an hour, feel the surface temperature of the oil cylinder by hand, and the temperature of the internal leakage cylinder body increases significantly. At this time, it is necessary to replace the internal oil seal to solve the problem.
The pressure drop of the hydraulic pump and drive motor of the cutting machine cannot reach the maximum load, and the work is weak. In addition to the drop of engine power, this kind of work failure is usually caused by a drop in the pressure of the hydraulic working pump, loss of control of the pressure relief valve, and oil in the drive motor. Wear on the disc surface. To be determined on a case-by-case basis. The most common is the high-pressure oil pipe burst. When replacing it, do not try to be cheap, and do not use counterfeit oil pipes. The high-pressure hydraulic pipes produced by the national regular manufacturers are all steel wire layers and have regular production numbers.
3. Precautions for maintenance work
Before the maintenance of the hydraulic machinery of the cutting machine, the captain who has the conditions should make preparations before the maintenance. It is best to do external cleaning, blow the outer surface of the machine with an air pump, and remove the external sludge and debris. Choose a site to facilitate maintenance work. Different manufacturers of hydraulic machinery have different product models and specifications. It is necessary to carefully identify the model number, classify it into different categories, and do not string it randomly. The repair of the hydraulic cylinder seems to be simple, but it is actually the most labor-intensive and time-consuming, and the body needs to be stabilized before disassembly. Do a good job of safety protection.
Before disassembling the pipeline, release the pressure, drain the oil, and disassemble the bolts. Some oil cylinders have not been repaired for a long time, and it is particularly difficult to separate the oil rod from the oil cylinder, and it has to be mechanically pulled with a wire rope. Note that special tools must be used when removing the cylinder piston, and it is strictly forbidden to smash it with a hammer to prevent damage to the piston surface and the oil seal ring groove. For some O-rings that are not broken, it is best not to damage them, so as to prevent them from being used again when there are no new ones. After the cylinder is decomposed, it should be cleaned and blown, and then replaced to repair.
