1、 Daily inspection and status monitoring

1. Monitoring of operating parameters
   • Check the temperature, pressure, current, and noise of the fan daily to ensure that the parameters are within the rated range. For example, the bearing temperature should not exceed 110 ℃, and the lubricating oil temperature should not exceed 90 ℃. If it exceeds the limit, the machine should be stopped immediately for troubleshooting.
   • Conduct a comprehensive inspection at least once a month, including power voltage stability, motor abnormal noise or odor, loose circuit connectors, etc., to avoid abnormal speed or motor damage caused by unstable voltage.
2. Vibration and Noise Analysis
   • Regularly monitor the sound of the unit during operation. If abnormal vibration or noise occurs, check the center of the pulley, bearing wear, and friction between the rotor and the casing. For example, the vibration value of the Roots blower needs to be within the standard range, and the monitoring positions include the vertical, horizontal, and axial positions of the front and rear bearing boxes.

2、 Cleaning and dust removal management

1. External cleaning
   • Clean the dust and dirt outside the fan every week, especially at the air inlet and outlet, to prevent dust accumulation from affecting heat dissipation. Use a soft cloth or brush during cleaning to avoid water or liquid entering the interior and causing a short circuit.
2. Internal and pipeline cleaning
   • Clean the air filter monthly to prevent dust and impurities from entering the interior of the fan. According to the usage environment, the filter needs to be replaced regularly (such as shortening the replacement cycle in high dust environments).
   • Clean the impeller at least once a year to remove dust and dirt, and avoid damaging the dynamic balance and increasing vibration. Simultaneously check the welding quality of the pipeline to prevent air leakage.

3、 Lubrication and oil management

1. Lubricating oil selection and replacement
   • Use lubricating oil that meets the requirements of the fan (such as diesel engine oil CD15W-40), and keep the oil level at half of the oil level mirror or the line position in the oil sight glass, without exceeding the limit.
   • Replace the lubricating oil after 500 hours of operation, and then replace it every 4000 hours or annually thereafter. If the oil appears black, milky white, or has an odor, it needs to be replaced immediately.
2. Bearing lubrication
   • Lubricating oil should be added to rolling bearings once a week, and oil should be added to the shaft seal device every 24 hours. Lubricating grease is used for motor bearings, which should be replaced every six months.
   • Before lubrication, check whether the oil gun and oil cup are unobstructed. The lubricating grease needs to be scraped by hand to prevent impurities from entering.

4、 Component inspection and replacement

1. Vulnerable Parts Management
   • Regularly inspect vulnerable parts such as blades, bearings, and gears. If there is wear or damage (such as impeller imbalance or spindle deformation), they should be replaced in a timely manner.
   • The tightness of the belt needs to be adjusted once a month. If it is too loose, it will result in low transmission efficiency. If it is too tight, it will increase the bearing load and affect the service life.
2. Safety device inspection
   • Check the pressure setting of the pressure relief valve (unloading valve) every month to ensure automatic release of excess pressure in case of overpressure and protect the fan.
   • Regularly check whether safety devices such as protective covers and nets are intact to prevent personnel from coming into contact with rotating parts.

5、 Fault handling and prevention

1. Common troubleshooting
   • The fan does not rotateCheck if the power supply, motor wiring, or fan head is stuck.
   • Increased noiseAdd bearing grease, replace bearings or impellers, and tighten fasteners.
   • temperature riseReduce the inlet temperature, add lubricating oil, or adjust the working state.
   • Reduced pressure/flow rateClean the filter screen, check the power supply voltage, or adjust the pipe network resistance.
2. overload protection
   • To avoid prolonged overload operation, adjust the inlet and outlet valves according to the working state, control flow and pressure, and prevent entering turbulent or surging zones.
   • Regularly check the power supply voltage and current, keep them within the specified range, and avoid voltage instability that may cause excessive motor load.

6、 Environment and Storage Management

1. Operating environment requirements
   • The fan should be placed in a dry and well ventilated environment to prevent the motor from getting damp. Rainproof measures should be taken when storing outdoors.
   • When used in a sealed environment, ventilation and heat dissipation should be strengthened. When the intake temperature is too high, a fan that allows a higher intake temperature should be selected (such as some models that allow an intake temperature of up to 70 ℃).
2. Long term storage and handling
   • When not in use for a long time, cut off the power and place it in a ventilated area. Rotate the shaft 180 ° every 24 hours to prevent impeller oxidation and blockage.
   • After discontinuation, the lubricating oil should be replaced according to maintenance requirements before use.