前彎葉片離心（xīn）風機運行速度（dù）相對較低，通常適用於大風量、低靜壓的工況。典型的流量範圍為30%-80% WOCMS(全敞口流量),最高的靜壓效率為（wéi）60%-68%，通常發生於靜壓最（zuì）大值的稍右側。功率曲線具有（yǒu）增加（jiā）的（de）傾（qīng）向，是“易過載型”風機。前彎葉片（piàn）離心風機的優點是造價低、轉速低，可選用（yòng）較細的軸和（hé）較小的軸承，且具有較寬的操作範圍（wéi）。缺點是性能（néng）曲（qǔ）線形狀可能與管網阻力曲線平行（háng），且係（xì）統靜壓降（jiàng）低可能導致電機過載。另外，葉片結構強度較低，不能運行於較高的轉速。
The centrifugal fan with forward curved blades operates at a relatively low speed and is usually suitable for high air volume and low static pressure. Typical flow range is 30% - 80% WOCMS (full open flow). The highest hydrostatic efficiency is 60% - 68%, which usually occurs on the slightly right side of the maximum hydrostatic pressure. The power curve has a tendency to increase, and it is an "easy overload" fan. The advantages of forward-bending blade centrifugal fan are low cost, low rotating speed, the choice of finer shaft and smaller bearings, and a wide operating range. The disadvantage is that the shape of the performance curve may be parallel to the resistance curve of the pipeline network, and the reduction of the static pressure of the system may lead to overload of the motor. In addition, the blade structure strength is low and can not run at a higher speed. 1、下降部件之間抵觸
1. Conflict between falling parts
軸承間和齒麵間之間（jiān）做著互相運（yùn）動，在外（wài）表參與潤滑油（yóu）的作用，就（jiù）是將抵觸麵離隔（gé），來下降部件之間的抵（dǐ）觸（chù）力，前進機械（xiè）設備的成效。
Between bearings and tooth surfaces, there is mutual movement, which participates in the role of lubricating oil on the surface, that is, separating the contact surface to reduce the resistance between components and advance the effectiveness of mechanical equipment.
2、減少磨損
2. Reduce wear and tear
在軸承（chéng）或齒（chǐ）麵間的潤（rùn）滑油能下降抵觸載荷，然後減少設備的磨損。
Lubricating oil between bearings or tooth surfaces can reduce the resistance load, and then reduce the wear of equipment.
3、冷卻
3, cooling
由於軸流風機的（de）作用，設備處於（yú）長時間（jiān）的作業，外表溫度必定高熱，添加潤滑油就（jiù）是能減低設備的（de）抵觸發（fā）熱。
Because of the role of the axial flow fan, the equipment is in a long period of operation, the external temperature is bound to be high heat, adding lubricant is able to reduce the device's anti-trigger heat.
4、防腐
4, anticorrosion
處於室外，長時間會導致設備的外表出現鏽蝕（shí），添加潤滑油（yóu）能夠隔絕空氣、腐蝕氣體等現象。
Being outdoors for a long time will lead to rust on the surface of the equipment. Adding lubricating oil can isolate air and corrosive gas.
