The core of maintenance for fluidized bed airflow pulverizers is prevention oriented, with regular inspections of subsystems, focusing on the sealing of the airflow system, wear and cleanliness of moving parts, in order to avoid sudden failures, extend equipment service life, and ensure pulverization accuracy.
        1. Daily maintenance: Check before and after each startup
        Daily maintenance should be carried out before each equipment startup and after shutdown, with short time consumption but able to detect potential hazards in a timely manner.
        Air source system inspection: Before starting up, check whether the pressure of the air compressor is normal (it should meet the rated air pressure requirements of the equipment), whether the filter is clogged, and if there is too much dust on the surface of the filter element, it should be cleaned or replaced in a timely manner to avoid impurities entering the crushing chamber and contaminating the material.
        Sealing status inspection: Check whether the connection between the crushing chamber, grading wheel and the body is well sealed. If the sealing ring is aged, deformed or cracked, it needs to be replaced immediately to prevent air leakage from causing a decrease in crushing efficiency or the mixing of external impurities.
        Cleaning work: After shutdown, it is necessary to clean the crushing chamber, grading wheel, and collection system (such as cyclone separator, bag filter). Especially when switching between different materials, residual materials must be thoroughly cleaned to avoid cross contamination of materials and affect product purity.
        2. Regular maintenance: Conduct in-depth inspections of key components on a periodic basis
        Regular maintenance should be carried out according to a fixed cycle (such as weekly, monthly, quarterly, please refer to the equipment manual for details), with a focus on the condition of easily worn and consumable components.
        Classification wheel maintenance: Check the operation status of the classification wheel every week and observe whether there are any abnormal noises or excessive vibrations. Disassemble the grading wheel every quarter and inspect the blades for wear, deformation, or material scaling. If the wear is severe, replace the blades to ensure grading accuracy; Clean the shaft sleeve and bearing at the same time, add special lubricating grease to ensure smooth rotation.
        Nozzle maintenance: Check the nozzles in the crushing chamber every month to see if the nozzle aperture has increased due to wear and tear (which can cause a decrease in airflow velocity and crushing efficiency), or if there is any material blocking the nozzle aperture. If the above situation occurs, the nozzle needs to be replaced, and the installation position of the nozzle should be ensured to be accurate during replacement to avoid deviation in airflow direction.
        Maintenance of motors and transmission components: Check the operating temperature (normally not exceeding 60 ℃) and current of the grading wheel motor and feeding motor every quarter. If the temperature is too high or the current is abnormal, check for bearing wear or circuit problems. At the same time, check the transmission belt of the motor and grading wheel (if any), check the tightness and wear of the belt, adjust the tension if it is too loose, and replace it if it is severely worn.
        3. Long term maintenance: annual comprehensive inspection and performance calibration
        A comprehensive maintenance is required once a year, not only for component inspection, but also for calibrating equipment performance to ensure long-term stable operation.
        Disassembly and inspection of core components: During annual maintenance, it is necessary to disassemble the crushing chamber, grading system, and power system, check the wear degree of vulnerable parts such as jaw plates and lining plates, and evaluate whether replacement is needed; At the same time, check the clearance of transmission components such as bearings and gears. If the clearance is too large, it needs to be adjusted or replaced to avoid abnormal vibration during equipment operation.
        Performance calibration: Use standard materials to calibrate the crushing particle size and grading accuracy of the equipment. If the actual output particle size deviates significantly from the set value, adjust parameters such as grading wheel speed and airflow pressure, or check whether the grading wheel blades are worn and causing grading failure to ensure that the equipment meets production accuracy requirements.
        Electrical system inspection: Check whether the wiring connections inside the electrical control cabinet are firm, whether the components such as contactors and relays are aging or oxidized, and whether the sensors (such as pressure sensors and temperature sensors) are sensitive. If there is a fault, it should be repaired or replaced in a timely manner to prevent electrical faults from causing equipment shutdown.
        4. Special Maintenance: Additional Maintenance for Special Materials
        If the equipment is used to handle heat sensitive, corrosive, or high humidity materials, additional maintenance measures need to be added.
        Thermally sensitive materials: Clean the crushing chamber immediately after each shutdown to avoid residual materials from clumping due to equipment waste heat; At the same time, regularly check the cooling system (if any) to ensure that the cooling effect is normal and prevent materials from deteriorating due to heat.
        Corrosive materials: After use, it is necessary to thoroughly clean the crushing chamber, grading wheel, and other components that come into contact with the materials with neutral cleaning agents. After drying, they should be stored to avoid corrosion of the components; When used for a long time, the lining plate and nozzle can be replaced with corrosion-resistant materials to extend the lifespan of the components.
        High humidity materials: Increase the inspection frequency of the drying device in the air source system to ensure that the compressed air is dry and avoid the material from absorbing moisture and adhering to the chamber wall or nozzle during the crushing process. At the same time, after stopping the machine, use hot air to dry the crushing chamber to prevent residual materials from becoming moldy.