1. Daily maintenance

Check the oil level, check the air filter element and the coolant level, check the hoses and all pipe joints for leaks, check that the consumable parts have reached the replacement cycle and must be stopped for replacement, check the exhaust temperature of the main engine, and reach or close to the pre-warning temperature. The oil cooler must be cleaned to check the pressure difference of the separator. When the pressure difference reaches 0.6 bar or more (the limit is 1 bar) or the pressure difference starts to decrease, the separation core should be shut down and replaced.

2. Monthly maintenance

Check the cooler, clean if necessary, check all wire connections and tighten them, check the contacts of the AC contactor, clean the dust on the surface of the motor suction port and the surface of the shell, clean the oil return filter, and check the air compressor settings Is it consistent with the operation?

3. Maintenance every quarter

Clean the main motor and fan motor, replace the oil filter element, clean the cooler, check the smallest pressure valve, safety valve, and check the sensor.

4. Annual maintenance

Replace lubricating oil and oil-air separator filter element, replace air filter element, oil filter, safety valve calibration, check elastic coupling, check cooling fan, clean automatic drain valve, add or replace motor lubricating grease.

The daily maintenance and repair records of screw air compressors can be recorded regularly or irregularly, or recorded after maintenance. Accurate records are conducive to timely analysis and troubleshooting when the air compressor fails. The main contents of the maintenance record include inspection, cleaning, adjustment, supplementation, replacement and corresponding time.

Notice

(According to equipment design, working conditions, consumables, service life, etc., the following data is for reference only)

A. When repairing and replacing components according to the above table, you must make sure that the pressure in the compressor system has been released, separated from other pressure sources, the switch on the main circuit has been disconnected, and safety signs indicating that closing is not allowed have been made.

B. The replacement time of the compressor cooling lubricant depends on the use environment, humidity, dust and whether there is acid or alkaline gas in the air. a. Machines using ordinary cooling oil: the new compressor should be replaced with new oil after 500 hours of operation for the first time, and then replaced every 2500 hours or once a year according to the normal oil change cycle. b. Machines using super cooling oil: Replace every 8000 hours or every two years. The oil of a non-continuous air compressor should be changed in due course. The oil of the sealed compressor should be changed every 2 years.

C. The oil filter must be replaced after 500 hours of use the first time it is turned on, and after 1000 hours of use the second time, it will be replaced every 2500 hours as normal.

D. When servicing and replacing the air filter or intake valve, remember to prevent any debris from falling into the machine head, and close the main machine inlet during operation. After the operation is completed, you need to rotate several times in the direction of rotation of the main machine by hand, and make sure that there is no obstruction before starting the machine.

E. Check the tightness of the belt every 3000-4000 hours of operation. If the belt is loose, adjust the nut until the belt is tensioned and the spring works; in order to protect the belt, it is necessary to prevent the belt from being contaminated by oil during the whole process. And scrapped.

F. Every time the oil is changed, the oil filter must be changed at the same time.

G. Maintenance method of motor

The operating environment of the motor should always be kept dry, the surface should be kept clean, and the air inlet should not accumulate dust, fibers and other debris. When the thermal protection and short circuit protection of the motor continue to operate, it should be checked whether the fault comes from the motor or the overload, or the protection device is set too low, and the fault can be put into operation after the fault is cleared. The motor bearing should be refilled with grease when it runs for 1500~2000h. The bearing temperature should not exceed 120℃. When the temperature is lower than 70℃, the interval of refilling grease can be appropriately extended. When filling oil, use a grease gun, first remove the grease plug on the drain pipe, add new grease until the original grease is discharged from the drain hole, wipe it with a rag, and tighten the oil plug after the oil is filled.

The daily maintenance and overhaul records of the air compressor can be recorded regularly or irregularly, or recorded after the overhaul. Accurate records are helpful for timely analysis and troubleshooting when the air compressor fails. The main contents of the maintenance record include inspection, cleaning, adjustment, supplementation, replacement and corresponding time.