關(guān)于羅茨風(fēng)機(jī)壓力和風(fēng)量的關(guān)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(jī)，如果壓力過大，建議加變頻器來調(diào)節(jié)。

　　首先，要明白幾個(gè)概念，羅茨風(fēng)機(jī)銘牌上的壓力是額定壓力，就是風(fēng)機(jī)可提供大**壓強(qiáng)，這個(gè)壓力值的大小與配套的電機(jī)功率成正比;另一個(gè)，羅茨風(fēng)機(jī)運(yùn)行時(shí)機(jī)頭上的壓力表顯示的壓力是管道內(nèi)的壓力，這個(gè)壓力表上的數(shù)值等于你管道的壓力，與管道的負(fù)荷有關(guān)成正比。

　　其次，無變頻器的普通羅茨鼓風(fēng)機(jī)的壓力無法隨便調(diào)的，主要原因是羅茨鼓風(fēng)機(jī)的電機(jī)功率是固定的，**的額定功率不變，羅茨鼓風(fēng)機(jī)的壓力就不會(huì)發(fā)生變化。如果壓力不夠的話，需要更換更大功率的電機(jī)，如果壓力過大，建議加變頻器來調(diào)節(jié)。

　　以下是一些壓力基本關(guān)系，可了解。

　　1、壓力與電機(jī)功率的關(guān)系

　　需要克服前方管道更大的壓力，就需要更大功率的電機(jī)，電機(jī)功率越大，風(fēng)機(jī)的功率就會(huì)越大。羅茨鼓風(fēng)機(jī)的壓力值是固定的，就是我們常說的選型壓力，這個(gè)壓力受到電機(jī)功率的影響。

　　風(fēng)機(jī)功耗

　　風(fēng)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(fēng)機(jī)中的tota/壓力增加(Pa，N/m-)

　　=風(fēng)機(jī)輸送的風(fēng)量(m/s)

　　不同風(fēng)量和壓力增加下的功耗如下所示：

　　風(fēng)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(duì)于詳細(xì)的工程設(shè)計(jì)，請(qǐng)使用實(shí)際風(fēng)機(jī)的制造商規(guī)范。

　　風(fēng)機(jī)效率

　　風(fēng)扇效率是傳輸?shù)綒饬鞯墓β逝c風(fēng)扇使用的功率之間的比率。風(fēng)扇效率通常與空氣密度無關(guān)，可表示為：

　　=dp q/p

　　2、壓力和風(fēng)量的關(guān)系

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

　　3、風(fēng)機(jī)壓力不夠怎么辦?

　　我們?cè)谑褂昧_茨風(fēng)機(jī)的過程中，我們有的朋友可能會(huì)發(fā)現(xiàn)，壓力表的表值達(dá)不到我們的要求，壓力值偏低，我們?cè)撛趺?*羅茨風(fēng)機(jī)的壓力呢?這種情況實(shí)際是羅茨風(fēng)機(jī)的選型壓力選大了，實(shí)際前方管道的壓力并沒有那么大，可加一個(gè)變頻器來省電，如果不在乎電費(fèi)不用管也可以。

　　以上關(guān)于羅茨鼓風(fēng)機(jī)壓力與風(fēng)量的關(guān)系由上海瑞柘環(huán)保設(shè)備集團(tuán)有限公司原創(chuàng)整理編輯!僅供瑞柘環(huán)?？蛻艨蛻魠⒖?

　　上海瑞柘環(huán)保設(shè)備集團(tuán)有限公司生產(chǎn)銷售羅茨鼓風(fēng)機(jī)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