离心式管道风机我想大家对这个词很陌生，尽管很多人都不知道离心式管道风机是什么，有什么作用，但是它确确实实的存在于我们生活中的每个角落是不可缺少的存在，下面我们就来了解下离心式管道风机。

Centrifugal duct fan I think you are very familiar with this word. Although many people do not know what centrifugal duct fan is and what its function is, it does exist in every corner of our life and is indispensable. Let's learn about centrifugal duct fan.

离心风机是依靠输入的机械能，提高气体压力并排送气体的机械，它是一种从动的流体机械。它根据动能转换为势能的原理，利用高速旋转的叶轮将气体加速，然后减速、改变流向，使动能转换成势能(压力)。在单级离心风机中，气体从轴向进入叶轮，气体流经叶轮时改变成径向，然后进入扩压器。在扩压器中，气体改变了流动方向造成减速，这种减速作用将动能转换成压力能。压力增高主要发生在叶轮中，其次发生在扩压过程。在多级离心风机中，用回流器使气流进入下一叶轮，产生更高压力。

Centrifugal fan is a driven fluid machine that relies on input mechanical energy to increase gas pressure and discharge gas. According to the principle that kinetic energy is converted into potential energy, it uses the high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction to convert kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes into the radial direction when the gas flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction to cause deceleration, which converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller, and then occurs in the diffuser process. In the multi-stage centrifugal fan, the reflux device is used to make the air flow enter the next impeller to generate higher pressure.

离心式管道风机—离心式管道风机构成

Centrifugal duct fan - composition of centrifugal duct fan

机壳：由钢板制成坚固可靠，可为分整体式和半开式，半开式便于检修。

Shell: made of steel plate, solid and reliable, can be divided into integral type and semi open type, which is convenient for maintenance.

叶轮：由叶片、曲线型前盘和平板后盘组成。

Impeller: composed of blades, curved front disk and flat rear disk.

转子：应做过静平衡和动平衡，保证转动平稳，性能良好。

Rotor: static balance and dynamic balance shall be conducted to ensure stable rotation and good performance.

传动部分：有主轴、轴承箱、滚动轴承及皮带轮(或联轴器)组成。

Transmission part: it is composed of main shaft, bearing box, rolling bearing and pulley (or coupling).

性质：基础装置的自振频率不得大于电机和通风机转速的1/3，通风机运转时的振动速度与通风机静止时的振动速度的差需大于3倍以上。

Nature: the natural vibration frequency of the foundation device shall not be greater than 1 / 3 of the rotating speed of the motor and the fan. The difference between the vibration speed of the fan during operation and the vibration speed of the fan at rest shall be more than 3 times.

柔性接头：通风机进出口与风管之间连接，应设柔性接头。进风管、出风管等装置应有单独支撑，并由基础或与建筑物其他构件支撑牢固，机壳不应承受其它机件的重量。

Flexible joint: flexible joint shall be set between the inlet and outlet of the fan and the air duct. Air inlet pipe, air outlet pipe and other devices shall be independently supported and firmly supported by the foundation or other components of the building. The cabinet shall not bear the weight of other parts.

建筑结构件：通风机安装在建筑物构件上时，应采取隔振措施。

Building structure: when the ventilator is installed on the building components, vibration isolation measures shall be taken.

直风管：管道通风机可安装在直风管上，具有接管方便，占用空间较小等优点

Straight air duct: the duct fan can be installed on the straight air duct, which has the advantages of convenient connection and small occupation space

离心式管道风机能好少、大容量、高压力、噪声低、结构紧、效率高、可塑性好，已经广泛应用于宾馆、剧院、ktv、商场大专院校及民用建筑的通风换气，成为了人们在生活当中不可缺少的一部分了。

The centrifugal duct fan has good performance, small capacity, high pressure, low noise, tight structure, high efficiency and good plasticity. It has been widely used in the ventilation of hotels, theatres, KTV, shopping malls, colleges and universities and civil buildings, and has become an indispensable part of people's life.

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