Fan maintenance and storage
1. The use environment should always be kept tidy, the surface of the fan should be kept clean, and there should be no debris at the inlet and outlet. Eliminate dust and other debris in the fan and pipes on time.
2. It can only be operated when the wind turbines are fully political. Tongjin must maintain sufficient power supply capacity, keep the voltage intact, and strictly prohibit phase loss operation. The power supply line must be a dedicated line, and temporary power supply lines should not be used for a long time.
3. During the operation of the fan, it is found that the fan has abnormal noise, the motor is severely feverish, the shell is electrified, the switch is tripped, and it cannot be started. It should be shut down immediately for inspection. In order to ensure safety and security, maintenance is not allowed while the fan is running. After the inspection, a test run should be carried out for about five minutes, and the machine should be turned on after confirming that there is no abnormal phenomenon.
4. Do not add or replace the lubricating grease on the bearing according to the conditions of the use environment (the motor block bearing does not need to replace the lubricating grease during the service life). In order to ensure good lubrication of the fan during operation, the number of refueling shall not be less than 1000 hours Second, seal the bearings and motor bearings, and fill 2/3 of the inner and outer rings of the bearing with ZL-3 lithium-based lubricating grease. Running short of oil is strictly prohibited.
5. The fan should be stored in a dry environment to prevent the motor from getting damp. When the fan is stored in the open air, measures should be taken to prevent rain. During storage and handling, the fan should be prevented from bumping to avoid damage to the fan.
The choice of the fan shell mainly depends on the thickness of the coating of the cold galvanized sheet. It is thin and easy to rust, so it is not suitable for selection; the fan inlet cover is made of galvanized steel sheet and glass. It is better to choose galvanized steel sheet; the matching motor power is 750 watts and 1100 watts, and the motor power of 1100 watts is selected. Good; there are many types of fans, including stainless steel, galvanized steel, aluminum alloy, and color steel. In terms of performance, stainless steel fan blades should be used. There are various fan blade shapes, and the shape and processing technology with good functions are complex; the rolling assembly has two kinds of die-cast aluminum and cast iron. In comparison, the die-cast aluminum has better performance; the automatic opening device of the shutter has centrifugal hammer type and gravity hammer type Gentle style. From experience, the centrifugal hammer type is less messy, the gravity hammer type is susceptible to dust accumulation, and the opening and closing is easy to fail. The wind blowing type is mainly used for 36-inch fans. The blinds mainly depend on whether their tightness is good.
Fan equipment used in a large number of industries such as electric power, steel, cement, papermaking, etc., because the conveyed gas medium contains a large amount of hard dust particles and acid gas, the flow parts of these equipment are subject to strong washing erosion, especially its The impeller, the heart component, runs at a linear speed of 160 meters per second at the end of its blades, and the wear speed is more severe than other parts. According to statistics, impellers made of ordinary carbon steel or general wear-resistant steel 16Mn generally have a service life of only half a year, and the shortest one is only tens of days. Although various surface anti-wear measures such as surfacing, spraying, spray welding, Coating with polymer wear-resistant materials, etc., can hardly improve the service life significantly. Among the more commonly used methods, surfacing welding is used more often, and the effect is acceptable. Generally, it can be used for more than one year without large-scale repairs. The disadvantage is that because of the large amount of heat input by surfacing welding, if the control is not good, the impeller will be deformed, and it cannot be repaired and used repeatedly. Thermal spray spray welding also has the same problem, which greatly limits their applications.
At present, a better method is to paste or inlay wear-resistant ceramics on the surface of the live volute of the impeller, because wear-resistant ceramics have good wear-resistant performance, which can greatly improve the wear-resistant performance of the extension.
2021,02,25