What are the differences between Roots blower and centrifugal blower?

离心式鼓风机的工作原理 当电机转动带动风机叶轮旋转时，叶轮中叶片之间的气体也跟着旋转，并在离心力的作用下甩出这些气体，气体流速增大，使气体在流动中把动能转换为静压能，然后随着流体的增压，使静压能又转换为速度能，通过排气口排出气体，而在叶轮中间形成了一定的负压，由于入口呈负压，使外界气体在大气压的作用下立即补入，在叶轮连续旋转作用下不断排出和补入气体，从而达到连续鼓风的目的。 同等功率下，风压和风量一般程反比。 同等功率下，风压高，风量就会相对低，而风量大，风压就会低些，这样才能充分利用电机的功效率。

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.

罗茨风机、罗茨鼓风机的工作原理 工作原理:茨风机为容积式风机，输送的风量与转数成比例，三叶型叶轮每转动一次由2个叶轮进行3次吸、排气，与二叶型相比，气体脉动变少，负荷变化小，机械强度高，噪声低，振动也小。在2根平相行的轴上设有2个三叶型叶轮，轮与椭圆形机箱内孔面及各叶轮三者之间始终保持微小的间隙，由于叶轮互为反方向匀速旋转，使箱体和叶轮所包围着的一定量的气体由吸入的一侧输送到排出的一侧。各支叶轮始终由同步齿轮保持正确的相位，不会出现互相碰触现象，因而可以高速化，不需要内部润滑，而且结构简单，运转平稳，性能稳定，适应多种用途，已运用于广泛的领域。

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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