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4-72离心风机是离心风机中一个比较常见的类型，在离心风机中的使用率和市场占有率都是非常的高。4-72离心风机在生产中如此常见，自然就要好好了解4-72离心风机参数了。在这篇文章中我们将对4-72离心风机参数进行详细的介绍。
4-72 centrifugal fan is a common type of centrifugal fan. Its utilization rate and market share are very high. 4-72 centrifugal fan is so common in production, so it is natural to have a good understanding of the parameters of 4-72 centrifugal fan. In this paper, we will introduce the parameters of 4-72 centrifugal fan in detail.

4-72离心风机参数介绍
4-72 centrifugal fan parameter introduction



4-72型离心式通风机可输送空气和其他不自燃的、对人体无害的、对钢材无腐蚀性的其他。气体内不允许有粘性物质，所含尘土及硬质颗粒物不大于150mg/立方。
4-72 centrifugal fan can convey air and other non spontaneous combustion, harmless to human body and non corrosive to steel. No viscous substances are allowed in the gas, and the dust and hard particles contained in the gas are not more than 150mg / m3.

气体温度不得超过80°C。该风机具有良好的气动性能、运转平衡、振动小、效率高、寿命长等特点。广泛适用于工矿企业、大型建筑物、宾馆酒楼等室内通气换气。
The gas temperature shall not exceed 80 ° C. The fan is characterized by good aerodynamic performance, balanced operation, small vibration, high efficiency and long service life. Widely used in industrial and mining enterprises, large buildings, hotels, restaurants and other indoor ventilation.

B4-72型防爆型离心式通风机、主要有铝叶轮、机壳、进风口等部分与防暴电机组成、可作为易燃挥发性气体的通风换气只用、其性能和安装尺寸同于4-72型。
B4-72 explosion-proof centrifugal fan is mainly composed of aluminum impeller, casing, air inlet and anti explosion motor. It can be used for ventilation of flammable volatile gas only. Its performance and installation size are the same as 4-72.

F4-72型为防腐型离心式通风机，主要用不锈钢(或玻璃钢)材质制成的叶轮、机壳、进风口等部分与电机组成，可用于输送腐蚀性气体，其性能与安装尺寸同于4-72型。
F4-72 is a corrosion-resistant centrifugal fan, which is mainly composed of impeller, casing, air inlet and other parts made of stainless steel (or fiberglass) and motor. It can be used to transport corrosive gas, and its performance and installation size are the same as 4-72.



工作环境
work environment

气体内不许有粘性物质，所含的尘土及硬质颗粒不大于150mg/m3。
There shall be no viscous substance in the gas, and the dust and hard particles contained shall not be more than 150mg / m3.

气体的温度：不超过80℃。
Gas temperature: no more than 80 ℃.

左旋右旋
Left-handed dextral

从电机一侧正视，叶轮顺时针旋转者称右旋风机，以“右”表示;叶轮逆进针旋转者称左旋风机，以“左”表示。
Facing from one side of the motor, if the impeller rotates clockwise, it is called right cyclone, which means "right"; if the impeller rotates counterclockwise, it is called left cyclone, which means "left".

风机的出口位置，以机壳的出风口角度表示。4-72型风机№2.8～7.1出厂时均做成一种型式，使用单位根据要求再安装成所需要的位置，订货时不需注明。其中№2.8出风口位置调整范围是0°～255°，间隔是45°;№16、20出风口位置制成固定的三种0°、90°、180°，不能调整，订货时需注明。
The outlet position of the fan is indicated by the outlet angle of the casing. 4-72 fans № 2.8-7.1 are all made into one type when leaving the factory, and the user shall install them to the required position according to the requirements, which shall not be noted when ordering. The position adjustment range of № 2.8 air outlet is 0 ° - 255 ° and the interval is 45 °; the position of № 16 and № 20 air outlet is made into three fixed positions of 0 °, 90 ° and 180 °, which can not be adjusted, and shall be noted when ordering.

传动方式
Transmission mode

风机的传动方式有A、B、C、D四种：以应达风机为例，4-72型风机中，№2.5～7.1采用A式传动，№8～12采用C、D式传动，№16～20采用B式传动。
There are four driving modes for fans: A, B, C and D: take Yingda fan as an example, among the 4-72 fans, № 2.5-7.1 is driven by type A, № 8-12 is driven by type C and D, and № 16-20 is driven by type B.

A式表示以电动机直联传动;
Type A indicates direct drive of motor;

B式表示悬臂支撑装置，皮带传动，皮带轮在轴承中间;
Type B refers to cantilever support device, with belt drive and pulley in the middle of bearing;

C式表示悬臂支撑装置，皮带传动，皮带轮在轴承外侧;
Type C refers to cantilever support device, driven by belt, with pulley outside the bearing;

D式表示悬臂支撑装置，用联轴器连接传动。
Type D refers to cantilever support device, which is connected and driven by coupling.


风机的结构
Structure of fan

4-72型风机中№2.8～6主要由叶轮、机壳、进风口、电机等部分组成。№8～20除具有上述部分外，还有传动部分。
No. 2.8-6 in 4-72 fan is mainly composed of impeller, casing, air inlet, motor, etc. No. 8-20 has not only the above parts, but also the transmission part.

(1)叶轮：由10个后倾机翼型叶片、曲线型前盘和平板后盘组成，用钢板制造，并经动、静平衡校正，空气性能良好，效率高，运转平稳。
(1) Impeller: it is composed of 10 airfoil blades, curved front plate and flat back plate of the rear tilt machine. It is made of steel plate and calibrated by dynamic and static balance. It has good air performance, high efficiency and stable operation.

(2)机壳：做成二种不同型式。其中№2.8～12机壳作成整体，不能拆开，№16～20的机壳制成三开式，除沿中分水平面分为两半外，上半部再沿中心线垂直分为两半，用螺栓连接。
(2) Casing: made of two different types. The shell № 2.8-12 is made as a whole and cannot be disassembled. The shell № 16-20 is made into three open type. Except that it is divided into two parts along the horizontal plane of the middle part, the upper part is divided into two parts vertically along the central line and connected with bolts.

(3)进风口：制成整体，装于风机一侧，与轴向平行的截面为曲线开关作用是能使气流顺畅时入叶轮，且损失较小。
(3) Air inlet: it is made into a whole and installed on one side of the fan. The section parallel to the axial direction is a curve switch, which can make the air flow into the impeller smoothly, and the loss is small.

(4)传动：由主轴、轴承箱、流动轴承、皮带轮或联轴器组成。
(4) Transmission: composed of main shaft, bearing box, flow bearing, pulley or coupling.

综上所述，这篇文章所介绍的就是4-72离心风机参数的详细信息。其实离心风机有非常多的类型，大家在选择离心风机投入工业生产的时候也不一定要选择4-72离心风机，也可以根据自己的实际情况来进行筛选，选出更加适合的离心风机。
To sum up, this article introduces the details of the parameters of 4-72 centrifugal fan. In fact, there are many types of centrifugal fans. When you choose centrifugal fans for industrial production, you don't have to choose 4-72 centrifugal fans. You can also select more suitable centrifugal fans according to your actual situation.


相信好多朋友都掂过离心风机，特别系4-72 model。咁系真嘅熟佢嘅属性与构造吗？今日就畀个作带大家好识下这款风机。
工作原理：
风机都系根据动能转换为位能嘅原理，利用赶旋转嘅后倾风轮将空气加速，转变方向，
令到动能转换成压力。喺单级离心式风机中，空气喺入风口轴向进入后倾风轮，空气经。
后倾风轮后改变流向为径向输出，风压增高主要发生喺后倾风轮中。