The maintenance method of screw air compressor is as follows:
1. ** Daily maintenance **
- ** Cleaning work ** : regularly clean the external surface and surrounding environment of the screw air compressor to prevent dust and impurities from entering the machine [^1^].
- ** Check the oil level ** : Check the oil level every day to ensure that it is within the prescribed range. If the oil level is found to be insufficient, lubricating oil should be added in time, but pay attention to not too much oil injection, otherwise the excess oil will be taken away by the gas [^2^][^5^].
- ** Check hose and pipe joints ** : Check hose and all pipe joints every day for leakage, if there is leakage, tighten or replace in time [^2^][^5^].
- ** Check the consumable parts ** : check whether the consumable parts have reached the replacement cycle, and if they need to be replaced, the machine must be stopped for replacement [^5^].
- ** Check the exhaust temperature ** : check the exhaust temperature of the main engine, if it reaches or is close to 98 ° C, the oil cooler must be cleaned [^5^].
- ** Check the pressure difference of separator ** : check the pressure difference of separator. When the pressure difference reaches above 0.6 Bar (limit 1Bar) or the pressure difference begins to decrease, the machine should be stopped and the separation core should be replaced [^5^].
2. ** Regular maintenance **
- ** Quarterly maintenance **
- ** Clean motor and cooler ** : Clean the main motor and fan motor, and clean the cooler at the same time to ensure good heat dissipation [^2^][^3^][^5^].
- ** Replace the oil filter element ** : replace the oil filter element every 1500-2000 hours, and the replacement cycle should be shortened in harsh environments [^4^].
- ** Check electrical components ** : Check the electrical components such as the contacts of the AC contactors to ensure that they are working properly [^2^][^5^].
- ** Check the pressure valve and safety valve ** : Check the minimum pressure valve and safety valve to ensure that they can work properly [^2^][^5^].
- ** Check the sensor ** : check the working state of the sensor to ensure the accuracy of its measurement [^2^][^5^].
- ** Half a year maintenance **
- ** Check the connection between the cooler and the wire ** : check the cooler and clean it if necessary; Check all wire connections and tighten [^2^][^5^].
- ** Replacement of air filter element ** : according to the use of the environment and air quality conditions, generally every 500-1000 hours or half a year to replace the air filter element [^1^][^3^].
- ** Calibration of relief valve ** : Calibration of the relief valve to ensure that the operating pressure is accurate [^5^].
- ** Check the elastic coupling ** : Check the concentricity of the elastic coupling and whether the elastic block needs to be replaced [^5^].
- ** Annual maintenance **
- ** Replace lubricating oil and oil-gas separator filter element ** : replace lubricating oil and oil-gas separator filter element, pay attention to replace the oil filter at the same time, and apply a layer of oil on the rubber sealing ring of the new oil filter to tighten [^5^].
- ** Check the cooling fan ** : Check the working state of the cooling fan to ensure its normal operation [^5^].
- ** Clean automatic drain valve ** : Clean automatic drain valve to ensure smooth drainage [^5^].
- ** Supplement or replace motor lubricating grease ** : supplement or replace motor lubricating grease to ensure the normal lubrication of the motor [^5^].
3. Troubleshooting
- ** Abnormal pressure ** : If abnormal pressure is found, the pressure sensor, electric control valve and other related components should be checked in time to ensure their normal work [^1^].
- ** Abnormal temperature ** : If abnormal temperature is found, check the cooling system and radiator to ensure their normal operation and cooling effect [^1^].
- ** Abnormal noise ** : If abnormal noise is found, all parts and connectors of the machine should be checked to eliminate fault points and ensure the normal operation of the machine [^1^].
To sum up, the daily, regular maintenance and troubleshooting of screw air compressor is the key to ensure the stable operation of equipment and prolong the service life. Careful cleaning, inspection, replacement and calibration can effectively prevent potential problems and ensure that the compressor is efficient and safe for all production activities.