關于羅茨風機壓力和風量的關系困擾了很多客戶，今天我們就來簡單介紹一下。 如果壓力不夠的話，需要更換更大功率的電機，如果壓力過大，建議加變頻器來調節。

　　首先，要明白幾個概念，羅茨風機銘牌上的壓力是額定壓力，就是風機可提供大**壓強，這個壓力值的大小與配套的電機功率成正比;另一個，羅茨風機運行時機頭上的壓力表顯示的壓力是管道內的壓力，這個壓力表上的數值等于你管道的壓力，與管道的負荷有關成正比。

　　其次，無變頻器的普通羅茨鼓風機的壓力無法隨便調的，主要原因是羅茨鼓風機的電機功率是固定的，**的額定功率不變，羅茨鼓風機的壓力就不會發生變化。如果壓力不夠的話，需要更換更大功率的電機，如果壓力過大，建議加變頻器來調節。

　　以下是一些壓力基本關系，可了解。

　　1、壓力與電機功率的關系

　　需要克服前方管道更大的壓力，就需要更大功率的電機，電機功率越大，風機的功率就會越大。羅茨鼓風機的壓力值是固定的，就是我們常說的選型壓力，這個壓力受到電機功率的影響。

　　風機功耗

　　風扇的理想功耗(無損耗)可以表示為

　　P： dp

　　(1)

　　哪里

　　P： =理想功耗(W

　　dp=風機中的tota/壓力增加(Pa，N/m-)

　　=風機輸送的風量(m/s)

　　不同風量和壓力增加下的功耗如下所示：

　　風扇，功耗

　　總壓力，總壓力

　　Pi = dp q (1)

　　where

　　Pi = ideal power consumption (W)

　　dp = total pressure increase in the fan (Pa, N/m2)

　　q = air volume flow delivered by the fan (m3/s)

　　筆記對于詳細的工程設計，請使用實際風機的制造商規范。

　　風機效率

　　風扇效率是傳輸到氣流的功率與風扇使用的功率之間的比率。風扇效率通常與空氣密度無關，可表示為：

　　=dp q/p

　　2、壓力和風量的關系

　　羅茨風機的壓力與風量無關，風機的選型壓力**并不能增大風機的風量，羅茨風機的風量與轉速息息相關，風機的轉速越高風量越大。通常，我們所說的冷卻風機的****風量和壓力，即風機的進風口和出風口之間沒有壓差的狀態下的風量(**風量)，而封閉房間的風機直到風量為零的狀態下的氣室和外界空氣的壓差(**靜壓)。它們不是兩個孤立的性能指標，而是相互制約的，流體力學中的速度與壓力之間的關系是——隨著氣流之間的壓差減小，風、氣壓測量需要通過符合美國AMCA-210標準的風洞測試儀進行;在選擇風扇時，還要考慮系統阻尼。

　　3、風機壓力不夠怎么辦?

　　我們在使用羅茨風機的過程中，我們有的朋友可能會發現，壓力表的表值達不到我們的要求，壓力值偏低，我們該怎么**羅茨風機的壓力呢?這種情況實際是羅茨風機的選型壓力選大了，實際前方管道的壓力并沒有那么大，可加一個變頻器來省電，如果不在乎電費不用管也可以。

　　以上關于羅茨鼓風機壓力與風量的關系由上海瑞柘環保設備集團有限公司原創整理編輯!僅供瑞柘環保客戶客戶參考!

　　上海瑞柘環保設備集團有限公司生產銷售羅茨鼓風機15年!

　　Many customers have been troubled by the relationship between the pressure and air volume of Roots blower. Today we will briefly introduce it. If the pressure is not enough, the motor with higher power needs to be replaced. If the pressure is too high, it is recommended to add a frequency converter for adjustment.

　　First of all, several concepts should be understood. The pressure on the nameplate of Roots blower is the rated pressure, that is, the blower can provide a large maximum pressure, and the value of this pressure is proportional to the power of the supporting motor; On the other hand, the pressure displayed by the pressure gauge on the head of Roots blower during operation is the pressure in the pipeline. The value on this pressure gauge is equal to the pressure of your pipeline, which is directly proportional to the load of the pipeline.

　　Secondly, the pressure of ordinary roots blower without frequency converter cannot be adjusted at will. The main reason is that the motor power of Roots blower is fixed, and the maximum rated power remains unchanged, so the pressure of Roots blower will not change. If the pressure is not enough, the motor with higher power needs to be replaced. If the pressure is too high, it is recommended to add a frequency converter for adjustment.

　　The following are some basic relationships of stress, which can be understood.

　　1. Relationship between pressure and motor power

　　To overcome the greater pressure of the pipeline in front, a higher power motor is required. The higher the motor power, the greater the fan power will be. The pressure value of Roots blower is fixed, that is, the model selection pressure, which is affected by the motor power.

　　Fan power consumption

　　The ideal power consumption (no loss) of the fan can be expressed as

　　P: DP

　　(1)

　　where

　　P: = ideal power consumption (W

　　Dp= tota/ pressure increase in the fan (PA, n/m-)

　　=Air volume delivered by fan (m/s)

　　The power consumption under different air volume and pressure increases is as follows:

　　Fan, power consumption

　　Total pressure

　　Pi = DP Q (1)

　　Where

　　Pi = ideal power consumption (W)

　　DP = total pressure increase in the fan (PA, n/m2)

　　Q = air volume flow delivered by the fan (m3/s)

　　Note for detailed engineering, please use the manufacturer's specifications of the actual fan.

　　Fan efficiency

　　Fan efficiency is the ratio of the power transmitted to the airflow to the power used by the fan. Fan efficiency is usually independent of air density and can be expressed as:

　　=DP q/p

　　2. Relationship between pressure and air volume

　　The pressure of Roots blower has nothing to do with the air volume. The pressure rise of blower selection does not increase the air volume of the blower. The air volume of Roots blower is closely related to the rotating speed. The higher the rotating speed of the blower, the greater the air volume. Generally, the optimal maximum air volume and pressure of the cooling fan, that is, the air volume (maximum air volume) under the condition that there is no pressure difference between the air inlet and outlet of the fan, while the pressure difference (maximum static pressure) between the air chamber and the outside air under the condition that the air volume of the fan in the closed room is zero. They are not two isolated performance indicators, but they restrict each other. The relationship between velocity and pressure in fluid mechanics is that as the pressure difference between air flows decreases, wind and pressure measurements need to be carried out by wind tunnel testers that meet the American amca-210 standard; System damping is also considered when selecting a fan.

　　3. What if the fan pressure is not enough?

　　In the process of using roots blower, some of our friends may find that the gauge value of the pressure gauge does not meet our requirements, and the pressure value is low. How can we increase the pressure of Roots blower? In fact, the pressure of Roots blower selection is too high. In fact, the pressure of the pipeline in front is not so high. You can add a frequency converter to save power. If you don't care about the electricity charge, you can leave it alone.

　　The above relationship between Roots blower pressure and air volume was originally edited by Shanghai Ruizhe Environmental Protection Equipment Group Co., Ltd! Only for the reference of Ruizhe environmental protection customers!

　　Shanghai Ruizhe Environmental Protection Equipment Group Co., Ltd. has been producing and selling roots blowers for 15 years!

　　The