The three filters and one oil of screw air compressor refers to the four consumables of screw air compressor: air filter element, oil filter, oil and gas separator and screw air compressor oil. The regular maintenance of air compressor is to replace these parts. . If the screw air compressor is well maintained and properly maintained, it will bring twice the result with half the effort to your production; on the contrary, if the maintenance is not timely, the air compressor will get into trouble with you from time to time, and it is common for you to lie down.
1. Replacement of screw air compressor oil filter
The running-in period of a new machine is generally 500 hours, and the oil filter needs to be replaced.
It is recommended to replace the oil filter with a new one every 2000 hours or so. When changing the engine oil, the oil filter is usually replaced at the same time. When used in harsh environments, the replacement cycle should be shortened. The service life of the oil filter and screw air compressor oil has a great relationship with the cleanliness of the air filter.
It is strictly prohibited to use the oil filter element beyond the specified period. Otherwise, due to the serious blockage of the filter element, the pressure difference exceeds the tolerance limit of the bypass valve, the bypass valve automatically opens, and a large amount of stolen goods and particles will directly enter the main engine of the screw air compressor with the oil, causing serious consequences.
2. Maintenance and maintenance of screw air compressor air filter element
The air filter element is the gatekeeper for filtering out air impurities. The filtered clean air enters the compression chamber of the screw rotor for compression. Because the internal clearance of the screw air compressor only allows particles within 15υm to be filtered out. If the air filter element is clogged and damaged, a large amount of particles larger than 15u will enter the internal circulation of the screw host, which will not only shorten the service life of the oil filter element and oil and gas separation element, but also cause a large amount of particles to directly enter the bearing cavity, accelerate bearing wear, increase the rotor clearance, and reduce the compression efficiency. Lower, or even rotor seizure.
Therefore, the air filter element should be maintained once a week. Use compressed gas to blow away the dust particles on the outer surface of the air filter element from the inner cavity.
Under normal circumstances, the air filter element should be replaced every 1000-2000 hours. In places where the environment is particularly harsh, such as mining, papermaking industry, and textile industry, it is recommended to replace the air filter element every 1000 hours.
3. Maintenance and replacement of screw air compressor oil and gas separator
The function of the oil and gas separator is to separate the oil and gas mixture. Under normal use, the life of the oil and fine separator is about 3,000 hours, but the quality of the lubricating oil and the filtration accuracy of the air have an important impact on its life. In harsh environments, the maintenance and replacement cycle of the air filter element must be shortened.
The oil and gas separator must be replaced after it has been used for about 3,000 hours or when the pressure difference between the front and rear exceeds 0.12Mpa. Otherwise, the motor will be overloaded, the current will be too large, and the oil and fine separator will be easily damaged and oil will leak out.
4. Maintenance and replacement of screw air compressor oil
The quality of screw air compressor oil has a decisive impact on the stability of oil-injected screw air compressors. Good oil has good anti-oxidation stability, rapid separation, good foam cleaning, high viscosity, and good anti-corrosion properties. Therefore, Users should use special screw oil that matches the equipment. (90% of practitioners have paid attention to the 'Compressor Network' WeChat public platform)
The oil should be replaced after the new machine's running-in period of 500 hours, and new oil should be replaced every 2,000 hours of operation. When changing the oil, replace the oil filter at the same time. Use in places with harsh environments to shorten replacement cycles.
If the air compressor oil is replaced when the machine is cold, the air compressor should be started and run for 5 minutes to allow the oil viscosity to drop. Completely stop operation, open the oil drain valve at the bottom of the oil and gas barrel, and connect to the oil storage tank. The oil drain valve should be opened slowly to prevent the lubricating oil under pressure and temperature from splashing and injuring the human body.
Frequent inspections are required during use. If the oil level is found to be too low, new oil should be added in time. Condensed water should also be discharged frequently during use of lubricating oil. Generally, it should be discharged once a week. In high temperature climates, it should be discharged once every 2-3 days.
It is strictly forbidden to mix different brands of lubricating oil, and avoid using lubricating oil for an extended period. Otherwise, the quality of the lubricating oil will decrease, the lubricity will be poor, the flash point will decrease, and it will easily cause high-temperature shutdown and spontaneous combustion of the oil.
5. Routine maintenance of screw air compressor cooler
It should be mentioned here that daily maintenance of the screw air compressor cooler is also very important. The heat dissipation effect directly affects the operating temperature of the air compressor. The plate-fin structure is prone to dust accumulation, so cooler maintenance requires regular purging with dry compressed air. If the screw air compressor is used in a harsh environment and the surface of the cooler is full of oil and cannot be blown clean, then the radiator must be removed and rinsed with high-pressure car wash water to restore the cooling effect of the screw air compressor radiator. .