离心式通风机主要由：叶轮、机壳、联轴器、轴。 叶轮是产生风压和传递能量的主要作功部件;机壳主要用来引入气体和排出气体，同时将气体的部分动能变为压力能;联轴器用来连接电机和风机，传递力矩;轴安装并固定叶轮，通过联轴器与电机。离心通风机主要由叶轮和机壳组成，小型通风机的叶轮直接装在电动机上中、大型通风机通过联轴器或皮带轮与电动机联接。离心通风机一般为单侧进气，用单级叶轮;流量大的可双侧进气，用两个背靠背的叶轮，又称为双吸式离心通风机。

Centrifugal fan mainly consists of impeller, casing, coupling and shaft. The impeller is the main work component that generates wind pressure and transmits energy; The casing is mainly used to introduce and discharge gas, and change part of the kinetic energy of the gas into pressure energy; The coupling is used to connect the motor and fan to transmit torque; The shaft is installed and fixed with the impeller, which is connected with the motor through the coupling. Centrifugal fan is mainly composed of impeller and casing. The impeller of small fan is directly installed on the motor. Medium and large fans are connected with the motor through coupling or belt pulley. Centrifugal fan is generally single-sided air inlet, with single-stage impeller; Large flow can be double-sided air intake, with two back-to-back impellers, also known as double suction centrifugal fan.

气体排出 ：离心通风机叶片之间的气体在叶轮旋转时，受到离心力作用获得动能(动压头)从叶轮周边排出，经过蜗壳状机壳的导向，使之向通风机出口流动，从而在叶轮中部位形成负压，使外部气流不断流入补充，从而使风机能排出气体。

Gas discharge: when the impeller rotates, the gas between the blades of the centrifugal fan is discharged from the periphery of the impeller by the kinetic energy (dynamic pressure head) obtained by the centrifugal force, and flows to the outlet of the fan through the guidance of the volute like casing, thus forming a negative pressure in the middle of the impeller, making the external air flow continuously flow in and supplement, so as to discharge the gas from the fan.

风压减小 ：电动机通过轴把动力传递给风机叶轮，叶轮旋转把能量传递给空气，在旋转的作用下空气产生离心力，空气延风机叶轮的叶片向周围扩散，此时，风机叶轮越大，空气所接受的能量越大，也就是风机的压头(风压)越大。如果将大的叶轮割小，不会影响风量，只会减小风压。

Wind pressure reduction: the motor transmits power to the fan impeller through the shaft, and the rotation of the impeller transfers energy to the air. Under the action of rotation, the air generates centrifugal force, and the air diffuses around along the blades of the fan impeller. At this time, the larger the fan impeller, the greater the energy received by the air, that is, the greater the pressure head (wind pressure) of the fan. If the large impeller is cut down, the air volume will not be affected, but the air pressure will be reduced.

叶轮是通风机的主要部件，它的几何形状、尺寸、叶片数目和制造精度对性能有很大影响。叶轮经静平衡或动平衡校正才能保证通风机平稳地转动。按叶片出口方向的不同，叶轮分为前向、径向和后向三种型式。前向叶轮的叶片顶部向叶轮旋转方向倾斜;径向叶轮的叶片顶部是向径向的，又分直叶片式和曲线型叶片;后向叶轮的叶片顶部向叶轮旋转的反向倾斜。

Impeller is the main component of fan. Its geometry, size, number of blades and manufacturing accuracy have a great impact on its performance. The impeller can rotate smoothly only after static balance or dynamic balance correction. According to the different direction of blade outlet, the impeller is divided into three types: forward, radial and backward. The top of the blade of the forward impeller is inclined to the rotation direction of the impeller; The blade top of radial impeller is radial, which is divided into straight blade type and curved blade type; The reverse inclination of the blade top of the backward impeller to the rotation of the impeller.

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The above is Shaanxi centrifugal fan manufacturer http://www.sdyqtc.com Thank you for checking the information of our company in your busy schedule. If you want to know more, you are welcome to call us for consultation!

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