工業(yè)離心式鼓風(fēng)機選型需要考慮很多方面的因素

目前離心風(fēng)機應用于工廠(chǎng)、環(huán)保行業(yè)、冶金、化工、紡織、食品等行業(yè)。離心式鼓風(fēng)機主要的應用包括輸送氣體、排掉廢氣、輸送物料、冷卻介質(zhì)等。設備的選擇是離心風(fēng)機生產(chǎn)流程中關(guān)鍵性的一步,但很多人都不了解應該怎么選。

At present, centrifugal fans are used in factories, environmental protection industry, metallurgy, chemical industry, textile, food and other industries. The main applications of centrifugal blower include conveying gas, discharging waste gas, conveying materials, cooling medium, etc. The selection of equipment is a key step in the production process of centrifugal fan, but many people do not know how to choose.

工業(yè)離心式鼓風(fēng)機選型需要考慮很多方面的因素，

Many factors need to be considered in the selection of industrial centrifugal blower,

其中需要考慮就是要平衡前期安裝成本和后期運行成本，這里的安裝成本包括了離心風(fēng)機成本，電機成本，風(fēng)機安裝尺寸等。

The installation cost includes centrifugal fan cost, motor cost, fan installation size and so on.

但是有些系統的安全系數考慮過(guò)大，也是沒(méi)有必要的。比如說(shuō)離心風(fēng)機實(shí)際運行壓力只有預期壓力的50%。導致離心通風(fēng)機在非常的效率點(diǎn)運行，甚至工況點(diǎn)偏離選型點(diǎn)過(guò)遠而引起電機過(guò)載。雖然可以改變風(fēng)機的轉速來(lái)解決電機過(guò)載問(wèn)題。卻也因此損失了很多風(fēng)量從而降低了系統的生產(chǎn)能力。

However, it is unnecessary to consider the safety factor of some systems. For example, the actual operating pressure of centrifugal fan is only 50% of the expected pressure. As a result, the centrifugal fan runs at a very high efficiency point, and even the operating point deviates from the selection point too far, resulting in motor overload. Although the fan speed can be changed to solve the problem of motor overload. But it also lost a lot of air volume, which reduced the production capacity of the system.

這種情況下，簡(jiǎn)單的解決方法是選擇大功率電機，但會(huì )因此同時(shí)增加安裝成本以及后期的運營(yíng)成本。與離心通風(fēng)機在設計中僅僅考慮增加壓力安全余量，不如結合安全余量與風(fēng)機的選型，增大使用壓力到風(fēng)機曲線(xiàn)高點(diǎn)壓力范圍，使操作壓力有較大的余量。

In this case, the simple solution is to choose high-power motor, but it will increase the installation cost and later operation cost. It is better to combine the safety margin with the type selection of the fan and increase the range from the operating pressure to the high point of the fan curve, so that the operating pressure has a larger margin.

如果起初系統設計預留20%的安全系數被認為是較理想的，那么離心通風(fēng)機選型應選擇風(fēng)機操作點(diǎn)壓力至少低于高壓力的15%，并同時(shí)預留10%的安全系數。這樣就會(huì )確保所選擇的風(fēng)機會(huì )在運行過(guò)程中更接近所需的的工作點(diǎn)。

If it is considered to be ideal to reserve 20% of the safety factor in the initial system design, the selection of centrifugal fan should select that the pressure at the operating point of the fan should be at least 15% lower than that of the high pressure, and a safety factor of 10% should be reserved at the same time. This will ensure that the selected wind turbine is closer to the required operating point during operation.