The operating environment should be kept clean at all times. The fan surface should be kept clean, and there should be no debris at the inlet and outlet. Regularly remove dust and other debris from the fan and ductwork.
The fan should only be operated when it is functioning completely normally. Sufficient power supply capacity and stable voltage must be maintained. Operation with a single phase is strictly prohibited. The power supply line must be a dedicated line; temporary power lines should not be used for extended periods.
If abnormal noises, severe motor overheating, live casing, circuit breaker tripping, or inability to start are observed during fan operation, the fan should be stopped immediately for inspection. For safety reasons, maintenance is not permitted while the fan is running. After maintenance, a test run of approximately five minutes should be performed to confirm the absence of abnormalities before restarting the fan.
The lubricating grease should be replenished or replaced periodically according to the operating environment (the lubricating grease of the motor's sealed bearings does not need to be replaced during their service life). To ensure good lubrication of the fan during operation, lubrication should be applied at least once every 1000 hours. For sealed bearings and motor bearings, use ZL-3 lithium-based lubricating grease to fill 2/3 of the inner and outer rings of the bearing. Operation without lubrication is strictly prohibited.
The fan should be stored in a dry environment to prevent the motor from getting damp. When the fan is stored outdoors, rain protection measures should be taken. During storage and transportation, the fan should be protected from impacts to avoid damage.
The thickness of the cold-dip galvanized steel coating is the main factor to consider when choosing a fan casing. Thin blades are prone to rust and should be avoided. Fan inlet covers are available in galvanized steel and glass; galvanized steel is preferable. Matching motors are available in 750W and 1100W options; 1100W is better. Fans come in various types and materials, including stainless steel, galvanized steel, aluminum alloy, and color-coated steel. Stainless steel fan blades are recommended for performance. Fan blade designs are diverse, with high-performance blades often featuring complex designs and manufacturing processes. Rotary assemblies are available in die-cast aluminum and cast iron; die-cast aluminum offers better performance. Automatic louver opening devices include centrifugal hammer, gravity hammer, and air-blowing types. Experience shows that centrifugal hammer types are more stable, while gravity hammer types are susceptible to dust accumulation and prone to malfunction. Air-blowing types are mainly used in 36-inch fans. For louvers, the key is to assess their airtightness.
Fans, widely used in industries such as power, steel, cement, and papermaking, transport gases containing large amounts of hard dust particles and acidic gases. The flow-through components of these devices suffer severe erosion and corrosion, especially the impeller, its core component. At the blade tips, the linear velocity reaches 160 meters per second, resulting in more severe wear than other parts. Statistics show that impellers made of ordinary carbon steel or general wear-resistant steel 16Mn typically have a service life of only six months, with some lasting only a few dozen days. Despite various surface anti-wear measures such as welding, spraying, and coating with high-polymer wear-resistant materials, their service life is difficult to significantly improve. Among the more commonly used methods, welding is the most prevalent and effective, generally allowing for over a year of use without major repairs.
A better method is to attach or embed wear-resistant ceramics onto the impeller and volute surface. Because wear-resistant ceramics have excellent wear resistance, they can greatly improve the wear resistance of the fan.
