What are the differences between Roots blower and centrifugal blower?

離心式鼓風機的工作原理 當電機轉動帶動風機葉輪旋轉時，葉輪中葉片之間的氣體也跟著旋轉，并在離心力的作用下甩出這些氣體，氣體流速增大，使氣體在流動中把動能轉換為靜壓能，然后隨著流體的增壓，使靜壓能又轉換為速度能，通過排氣口排出氣體，而在葉輪中間形成了一定的負壓，由于入口呈負壓，使外界氣體在大氣壓的作用下立即補入，在葉輪連續(xù)旋轉作用下不斷排出和補入氣體，從而達到連續(xù)鼓風的目的。 同等功率下，風壓和風量一般程反比。 同等功率下，風壓高，風量就會相對低，而風量大，風壓就會低些，這樣才能充分利用電機的功效率。

Working principle of centrifugal blower when the motor rotates to drive the fan impeller to rotate, the gas between the blades in the impeller also rotates, and these gases are thrown out under the action of centrifugal force. The gas flow rate increases, so that the kinetic energy of the gas is converted into static pressure energy in the flow, and then with the pressurization of the fluid, the static pressure energy is converted into speed energy, and the gas is discharged through the exhaust port, forming a certain negative pressure in the middle of the impeller, Due to the negative pressure at the inlet, the external gas is immediately replenished under the action of atmospheric pressure, and the gas is continuously discharged and replenished under the continuous rotation of the impeller, so as to achieve the purpose of continuous blowing. Under the same power, the wind pressure and air volume are generally inversely proportional. Under the same power, if the air pressure is high, the air volume will be relatively low, while if the air volume is large, the air pressure will be lower, so as to make full use of the efficiency of the motor.

羅茨風機、羅茨鼓風機的工作原理 工作原理:茨風機為容積式風機，輸送的風量與轉數(shù)成比例，三葉型葉輪每轉動一次由2個葉輪進行3次吸、排氣，與二葉型相比，氣體脈動變少，負荷變化小，機械強度高，噪聲低，振動也小。在2根平相行的軸上設有2個三葉型葉輪，輪與橢圓形機箱內(nèi)孔面及各葉輪三者之間始終保持微小的間隙，由于葉輪互為反方向勻速旋轉，使箱體和葉輪所包圍著的一定量的氣體由吸入的一側輸送到排出的一側。各支葉輪始終由同步齒輪保持正確的相位，不會出現(xiàn)互相碰觸現(xiàn)象，因而可以高速化，不需要內(nèi)部潤滑，而且結構簡單，運轉平穩(wěn)，性能穩(wěn)定，適應多種用途，已運用于廣泛的領域。

Working principle of Roots blower and roots blower working principle: Roots blower is a positive displacement fan, and the air volume conveyed is proportional to the number of revolutions. Each time the three blade impeller rotates, two impellers suction and exhaust three times. Compared with the two blade impeller, the gas pulsation is reduced, the load change is small, the mechanical strength is high, the noise is low, and the vibration is also small. Two three leaf impellers are set on two parallel shafts, and a small gap is always maintained between the wheel and the inner hole surface of the oval box and each impeller. Because the impellers rotate at a uniform speed in the opposite direction to each other, a certain amount of gas surrounded by the box and the impeller is transmitted from the suction side to the discharge side. Each impeller is always kept in the correct phase by the synchronous gear, without touching each other, so it can be high-speed, does not need internal lubrication, and has simple structure, stable operation, stable performance, suitable for a variety of uses, and has been used in a wide range of fields.

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