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Attention to Motor Selection for Structural Form of Fire Exhaust Fan

Release Time：2021-07-20

The common construction forms of fire exhaust fans include the form of internal refrigeration electric air centrifugal impeller, the form of suction refrigeration motor cyclone, and the low-speed fire exhaust fans in the form of flow plates and moving blades that suck in refrigeration air. Their characteristics and actual effects are different.
In the form of internal refrigeration electric air centrifugal impeller, the smoke temperature in the main duct of this kind of fire-fighting smoke exhaust fan can reach 280 ℃, the smoke is transported by the centrifugal impeller installed on the motor, and then the area where the motor was originally installed with the refrigeration centrifugal impeller, the cooling fan for the refrigeration motor is designed again, connected with the air inlet cut on the casing and the ventilation and fire-fighting smoke exhaust fan port, and according to the motor and the centrifugal fan wheel, the channel refrigeration motor.
This form of motor refrigeration channel can ensure that when the temperature of the popular channel reaches 300 ℃, the temperature of the outer shell can be maintained at about 130 ℃. At the working temperature here, the effect can be achieved by selecting a general flame retardant grade motor, and there is no need to select a high-temperature insulation layer motor, thus greatly reducing the manufacturing cost of the centrifugal fan.
The cyclone of the refrigeration motor is sucked in by the main working middle wheel and then discharged into the main cyclone. The fire exhaust fan and the main cyclone converge and discharge together. This structure is simple and does not need the guide vane behind the centrifugal impeller of the refrigeration motor. The design scheme of streamline support point is selected to reduce the noise pollution at the inlet of the centrifugal fan. This type of motor has relatively low working efficiency, there is no need to make a single-speed structure to increase the cost of the project.
Before application, people should remove the dust inside the smoke exhaust fan on time, especially the dust on the centrifugal impeller, delays and other residues to prevent rust and imbalance. On the other hand, they should try their best to reduce some common faults that will occur in machinery and equipment, such as the large flow rate or high temperature of the electric fire-fighting smoke exhaust fan, and the rolling bearing box violently surpasses these. Do a good job in prevention work, smoke exhaust fan motor selection must be common problems:.
1. The key main parameters used are operating temperature, exhaust air volume, motor rated power, high efficiency, noise, motor rated power, speed ratio and shaft power.
2, in the material temperature is not higher than 85 ℃ standard should also be long-term all normal operation.
3. It should be ensured that: when the temperature of the transported material is 280 ℃, it should continue to work for 30min, and everything can continue to operate normally when the material temperature is cooled to the working temperature.
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.