Maintenance and maintenance of intake air filter element.
The air filter is a component for removing air dust and dirt. The filtered clean air enters the screw rotor compression chamber for compression. Because the internal clearance of screw machine only allows particles within 15u to be filtered out. If the air filter core is blocked and damaged, a large number of particles larger than 15u enter the screw machine to circulate, which not only greatly shortens the service life of oil filter core and oil separation core, but also causes a large number of particles directly into the bearing chamber, accelerates bearing wear, increases the rotor clearance, reduces compression efficiency, and even makes the rotor dull and bite.
The air filter element should be maintained once a week. Turn off the cap nut, take out the empty filter core, use 0.2-0.4 Mpa compressed air, blow out the dust particles on the outside surface of the air filter core from the inner cavity of the air filter core, and wipe off the stolen goods on the inner wall of the air filter shell with a clean cloth. Re-loading the air filter element, so that the sealing ring at the front end of the air filter element should be closely adhered to the inner end face of the air filter shell.
Normally, the air filter element is replaced every 1000-1500 hours, especially in places where the environment is particularly harsh, it is better to replace the air filter element every 500 hours.
Note: When cleaning or replacing the air filter element, the components must be matched one by one to prevent foreign matter from falling into the intake valve. Usually, it is necessary to check whether the intake expansion tube is damaged or flattened, and whether the connection port between the expansion tube and the air filter intake valve is loose or leaky. If found, it should be repaired and replaced in time.
2. Replacement of oil filter.
The oil core should be replaced 500 hours after the first operation of the new machine. The special wrench reverse rotation oil filter core should be removed. Screw oil should be added before the new filter core is installed. The seal of the filter core should be screwed back to the oil filter seat with both hands and tightened.
It is recommended to replace the new filter element every 1500-2000 hours. It is better to replace the oil filter element at the same time when changing the oil. The replacement period should be shortened when using in bad environment. It is strictly forbidden to use oil filter element beyond the deadline.
3. Maintenance and replacement of oil separator.
Oil separator is a component that separates screw lubricating oil from compressed air. Under normal operation, the service life of oil separator is about 3000 hours. However, in harsh environment, it is necessary to shorten the maintenance and replacement cycle of air filter element, and even consider installing a pre-air filter.
Oil separator must be replaced after expiration or after pressure difference exceeding 0.12 Mpa.
Replacement method: Remove the control pipe fittings installed on the oil and gas barrel cover. Remove the oil return pipe that extends into the oil and gas barrel on the cover of the oil and gas barrel, and remove the fastening bolt of the top cover of the oil and gas barrel. Remove the top cover of the oil and gas barrel and remove the oil separator. Remove the asbestos mat and dirt adhering to the cover. Install new oil separator, pay attention to the upper and lower asbestos pads must be stapled, when pressed asbestos pads must be neat, otherwise it will cause cushion. Install the upper cover plate, oil return pipe and control pipes according to the original sample to check whether there is leakage or not.
4. Maintenance and replacement of screw oil.
The quality of screw oil has a decisive influence on the performance of oil injection screw machine. Good oil products have good antioxidant stability, rapid separation, good foaming, high viscosity and good anti-corrosion performance. Therefore, pure special screw oil must be used. The new machine will be replaced for the first time after 500 hours of running-in period, and the new oil will be replaced every 2000 hours after operation. It is better to replace the oil filter at the same time when changing oil.
Replacement method: Start the compressor running for 5 minutes, make the oil temperature rise to above 50 C, the oil viscosity decreases. Stop operation. When there is 0.1 Mpa pressure in the oil and gas barrel, open the oil discharge valve at the bottom of the oil and gas barrel and connect it to the oil storage tank. Open the drain valve slowly, and close the drain valve after the lubricant drops. Turn on the oil filter element, drain the lubricating oil in each pipeline at the same time, and replace it with a new oil filter element. Open the screw plug at the filling port and inject new oil so that the oil level is within the range of the oil scale. Tighten the screw plug at the filling port to check for leakage. During the use of lubricating oil, when it is found that the oil level is too low, new oil should be added in time, and condensate water must be discharged regularly, preferably once a week, and once in 2-3 days in high temperature climate. It is strictly forbidden to mix different brands of lubricants, and to avoid the overuse of lubricants.
5. Maintenance of cooler.
The cooling effect of the cooler directly affects the operating temperature of the air compressor. The screw cooler is upright. When it is maintained, it needs to use dry compressed air above 0.4Mpa to blow from outside to inside. After blowing, the dust and particles in the air guide hood are cleaned up to prevent blockage caused by fan blowing into the cooler again and cause high temperature of the machine.
In a word, it is very necessary to replace parts and lubricants regularly according to operation rules, clean oil system and water-way of cooler, record operation parameters comprehensively, analyze regularly, find out the existing problems and timely overhaul.
