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What does the axial flow fan serve? The cause of the fan bearing failure

Release Time：2021-07-20

On the axial flow fan people still don't know where it is used, it can be used for general factories, warehouses, offices, residential and other places of ventilation, it is simple and better ventilation.
1. Anti-corrosion and explosion-proof axial flow fans adopt anti-corrosion materials and explosion-proof measures, and match explosion-proof motors. They can be used for general-purpose ventilation equipment in places where explosive, volatile, and corrosive gases are used.
2. It is required that the gas transported by the axial flow fan should be free of significant dust, non-viscous and fibrous substances, the temperature of the motor direct connection type should not exceed 40 ℃, and the temperature of the belt drive type should not exceed 60 ℃.
3. Axial flow fan Axial flow fan is mainly composed of impeller, casing, motor and other parts. The bracket is connected with the casing ram by section steel. Among them, the anti-corrosion type axial flow fan impeller and casing are made of glass fiber reinforced plastic. Other types of axial flow fans are generally made of steel plate.
4. The working principle of the axial flow fan: When the impeller rotates, the gas enters the impeller axially from the air inlet, and is pushed by the blades on the impeller to increase the energy of the gas, and then flows into the guide vanes, which will deflect the airflow into the axial At the same time, the gas is introduced into the diffuser pipe to further convert the kinetic energy of the gas into pressure energy, and finally into the working pipeline.

Axial fan fan bearing fault causes and troubleshooting methods:
1. Analysis of the cause of the failure: both sides of the vane are fixedly matched with the bearing of the bearing seat. The failure of high temperature and high vibration value of the free end bearing will occur when the test is re-run. The upper cover of the bearing turn is disassembled and the slow-speed rotary fan is manually operated. It is found that the bearing roller at a specific position of the rotating shaft also rolls in the non-load area. In this way, it can be determined that the bearing running clearance changes too high and the installation clearance may be insufficient.
2. Elimination method: During treatment, unseat the tightening sleeve, readjust the matching tightness between the shaft and the inner ring, take the clearance after replacing the bearing 0.10mm, restart the axial flow fan after reinstalling the axial flow fan, and the vibration value and operating temperature of the bearing return to normal.
The small internal clearance of the bearing or the poor design and manufacturing accuracy of the parts are the main reasons for the high operating temperature of the extension bearing. In order to facilitate the installation, disassembly, repair and maintenance of the fan equipment. Generally, the design of the bearing seat bearing with the inner ring of the fixed sleeve bearing taper hole is used, but it is also easy to cause problems due to negligence in the installation procedure. In particular, the appropriate clearance of the trim, bearing internal clearance is too small. The operating temperature rises rapidly: the taper hole of the inner ring of the bearing is too loose with the adapter sleeve, and the bearing is easy to break down and burn out in the short term due to the loosening of the mating surface.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.