In smoke and fire exhaust fan is a common fan and high-quality product. Super-high performance has won the general recognition of customers. But if we use it improperly, it may lead to the bending fracture of the main shaft of the smoke exhaust fan. Even our analysis should be based on the following three reasons:
1. Impeller grinding or blade scaling is serious, which causes impeller unbalance and centrifugal inertia force. Under the action of centrifugal force, it produces violent vibration.
2. Installation of smoke exhaust fan box and motor is not aligned during maintenance. When the two axes of exhaust fan box and motor are connected by coupling, the axial and radial deviations are too large, which makes the whole machine produce greater vibration and makes the shaft deform.
3. Work shaft rolling bearings are worn seriously, and when the clearance is too large, the vibration is intense, resulting in greater bending stress, which leads to the bending deformation of the shaft.
Dual-speed exhaust fan installs fan, or pulls impeller by hand. Fire exhaust fan checks whether there is a close rubbing phenomenon. Any obstacle to rotating object, no abnormal phenomenon, can be tested and run. Wind should expose part of the opportunity to drive shield (users should bring their own). If the air inlet of the fan is not closed, guardrail or other safety devices should be purchased.
The connection of the fan must be correct and reliable, the grounding of the fan shell must be correct, and the grounding must be reliable.
Fire exhaust fan performance is very outstanding, and has been widely used, most users like, and fire exhaust fan application is relatively strong, in the case of voltage instability can also be applied, smoke exhaust fan, but we must operate it reasonably, only in this way can successfully complete the task of smoke exhaust.
We all know that fire exhaust fans mainly work for 20 hours at medium temperature of 100 (?) C continuously without damage. Fire exhaust fans at 3 (?) C, high-rise buildings, underground buildings and tunnels, ventilation in drying rooms or high-temperature smoke, etc. The main parameters of fire exhaust fan are working temperature, air volume, noise, total pressure and efficiency, power, speed and shaft power.
Manufacturer of Fire Exhaust Fan
High temperature smoke exhaust fan is mainly suitable for high-rise buildings, underground buildings, tunnels, drying room ventilation or high temperature smoke. When the temperature exceeds 30 minutes at 280 C under working conditions, the medium temperature is 100 C. Fire exhaust fan is mainly the production and operation environment. We must make full use of its performance according to its reasonable utilization.
Now we know the cause of fatal damage of fire exhaust fans. We should pay attention to these points in the use process to ensure that the fans can work normally and play their due role.