1. Regularly check the hydraulic oil.
The open-pit DTH drilling rig is a semi-hydraulic vehicle, that is, except for compressed air, other functions are realized through the hydraulic system, and the quality of the hydraulic oil is crucial to the normal operation of the hydraulic system.
① Open the hydraulic oil tank and observe whether the color of the hydraulic oil is clear and transparent. If it has emulsified or deteriorated, it must be replaced immediately. If the drilling frequency is high, the hydraulic oil is generally replaced every six months. Do not mix two hydraulic fluids!
② The hydraulic oil equipped with the drilling rig is wear-resistant hydraulic oil, which contains antioxidants, anti-rust agents, anti-foaming agents, etc., which can effectively prevent early wear of hydraulic components such as oil pumps and hydraulic motors. Commonly used wear-resistant hydraulic oils are: YB-N32.YB-N46.YB-N68, etc. The larger the endnote number, the higher the kinematic viscosity of the hydraulic oil. According to different ambient temperatures, YB-N46 or YB-N68 hydraulic oil with higher viscosity is generally used in summer, and YB-N32.YB-N46 hydraulic oil with lower viscosity is used in winter. In view of the fact that there are still some old models of wear-resistant hydraulic oil, such as YB-N68, YB-N46, YB-N32 and so on.
2. Regularly clean the oil tank and oil filter.
Impurities in hydraulic oil will not only cause failure of hydraulic valves, but also aggravate the wear of hydraulic components such as oil pumps and hydraulic motors. Therefore, we have set up an oil suction filter and an oil return filter on the structure to ensure the cleanliness of the circulating oil in the system. However, due to the wear and tear of hydraulic components during work, adding hydraulic oil will inadvertently enter impurities, so regular cleaning of the oil tank and oil filter is the key to ensuring oil cleaning. Prevent hydraulic system failure and prolong the service life of hydraulic components.
① The improved oil suction filter is installed under the oil tank and connected with the oil suction port of the oil pump. Because of its self-locking function, that is, after the filter element is removed, the oil filter can automatically close the oil port without leakage. When cleaning, just unscrew the filter element and rinse it with clean diesel oil. The oil suction filter should be cleaned once a month. If the filter element is found to be damaged, it should be replaced immediately!
② The oil return filter is installed above the oil tank and connected with the oil return pipe. When cleaning, just unscrew the filter element and rinse it with clean diesel. The oil return filter should be cleaned once a month. If the filter element is damaged, it should be replaced immediately!
③ The oil tank is the intersection of oil suction and oil return, and it is also the place where impurities are most likely to deposit and concentrate, so it should be cleaned frequently. Open the oil plug every month, flush part of the oil out of the impurities at the bottom, clean it thoroughly every six months, release all the oil (it is recommended not to use it or filter it multiple times), and add new hydraulic oil after cleaning the oil tank.
3. Clean the lubricator in time and add lubricating oil.
The down-the-hole drilling rig realizes percussion rock drilling through the impactor. Good lubrication is a necessary condition to ensure the normal operation of the impactor. Because there is often water in the compressed air and the pipeline is not clean, after a period of use, a certain amount of water and impurities often remain at the bottom of the lubricator, which will affect the lubrication and service life of the impactor. Therefore, when it is found that there is no oil in the lubricator or there is moisture and impurities in the lubricator, it should be removed in time. When adding lubricating oil, the main intake valve must be closed first, and then the shock valve should be opened to eliminate the residual air in the pipeline to avoid damage. Operation without lubricating oil is strictly prohibited!
4. Do a good job in diesel engine running-in and oil replacement.
The diesel engine is the source power of the entire hydraulic system, which directly affects the climbing ability of the drilling rig. Propelling (improving) force, rotating torque, rock drilling efficiency, and timely maintenance are the prerequisites for the drilling rig to perform well.
① New or overhauled diesel engines must be run-in before use to improve the reliability and economic life of the diesel engine. Run for 50 hours at less than 70% of rated speed and 50% of rated load.
② After running-in, release the oil in the oil pan while it is hot, clean the oil pan and oil filter with diesel, and replace the oil and filter.
③ After the break-in period is over, replace the oil and filter every 250 hours.
④ Carefully read the manual of the diesel engine and do other maintenance work well.
Post time: Jun-09-2023
