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. 葉輪磨削或葉片結垢嚴重，導致葉輪失去平衡，產生離心慣性力。在離心力的作用下，產生劇烈的振動。

　　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. 維修時排煙風機箱與電機安裝不對齊。排煙風機箱與電機兩軸通過聯軸器連接時，軸向偏差和徑向偏差過大，使整機產生較大的振動，使軸變形。

　　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.工作軸滾動軸承磨損嚴重，間隙過大時振動劇烈，產生較大的彎曲應力，導致軸彎曲變形。

　　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.

　　雙速排風機安裝風扇,或用手桿拉移動葉輪,消防排煙風機檢查是否有一個緊密的擦碰現象,任何妨礙旋轉對象,沒有異常現象,可以測試運行,風應該暴露部分的機會驅動盾(用戶應該帶上自己的)。如風機進氣口不收線，還需購置護欄或其他裝置(用戶應自備)。

　　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.

　　風機接線必須正確可靠，風機外殼接地必須正確，接地必須可靠。

　　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.

　　消防排煙風機性能非常突出,并已廣泛使用,大多數用戶喜愛,和消防排煙風機應用也相對強勁,在電壓不穩定的情況下也可以應用,排煙風機,但我們必須合理地操作它,只有這樣才能成功完成的任務排煙。

　　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.

　　我們都知道火災排煙風機主要是在中溫100℃條件下連續工作20小時/次不損壞的情況下，3℃火災高溫風機、高層建筑、地下建筑及隧道、干燥室通風或高溫煙氣等。火災排煙風機的主要參數是工作溫度、風量、噪聲、總壓和效率、電力、轉速和軸功率。

　　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.

　　消防排風機制造商

　　Manufacturer of Fire Exhaust Fan

　　高溫消防排煙風機主要適用于高層建筑、地下建筑、隧道、烘干室通風或高溫煙,等工作條件下的280℃高溫超過30分鐘后,介質溫度100℃,消防排煙風機主要是生產和運行的環境,我們必須根據它的合理利用,因此它的性能充分發揮。

　　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.

　　現在我們知道了火災排風機致命損壞的原因，在使用過程中要注意這些要點，確保風機能夠正常工作，發揮應有的作用。

　　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.