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风机的性能参数主要有流量、压力、功率，效率和转速。另外，噪声和振动的大小也是主要的风机设计指标。流量也称风量，以单位时间内流经风机的气体体积表示；压力也称风压，是指气体在风机内压力升高值，有静压、动压和全压之分；功率是指风机的输入功率，即轴功率。风机有效功率与轴功率之比称为效率。风机全压效率可达90％。 

工业风扇代理销售: 

【程先生 139 188 64473 qq:937926739】

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。 

   风机广泛用于工厂、矿井、隧道、冷却塔、车辆、船舶和建筑物的通风、排尘和冷却；锅炉和工业炉窑的通风和引风；空气调节设备和家用电器设备中的冷却和通风；谷物的烘干和选送；风洞风源和气垫船的充气和推进等。 

   风机的工作原理与透平压缩机基本相同，只是由于气体流速较低，压力变化不大，一般不需要考虑气体比容的变化，即把气体作为不可压缩流体处理。 

风机分类 标准笼型感应电动机一般均采用自扇风冷，即在电机输出轴上加装风叶片，电机在运转时，靠风叶旋转冷却，排出电机内部热量，达到一个热平衡。

ysdzxcvb201605211

目前市场上的变频电机，如果在订货时不加说明，默认标配均是采用独立风机冷却，结构上在电机转轴上不带叶片，取而代之的是在电机的风叶罩内加装一台风机，即主电机散热风扇采用独立的电机驱动。

 

国内专业的变频电机生产厂不生产风机，对变频电机的风机基本上采取外购。配套的风机电机大多采用B级绝缘，以多年使用变频电机的经验来看，变频电机故障率的恰恰是风机电机，一旦风机发生故障，变频电机则会因通风不畅，使内部热量不能尽快散发出去导致温度快速升高。

为防止变频电机因风机故障过热烧损，电动机的发热与冷却电机带负荷运行中，在电能转化为机械能过程中，因产生损耗而发热。一般在控制保护上，变频电机与其冷却风机电机间均加装联锁，一旦风机电机烧损或过热则停主电机。

  风机分类可以按气体流动的方向，分为离心式、轴流式、斜流式和横流式等类型。 

  风机根据气流进入叶轮后的流动方向分为：轴流式风机、离心式风机和斜流(混流)式风机。 

  风机按用途分为压入式局部风机(以下简称压入式风机)和隔爆电动机置于流道外或在流道内，隔爆电动机置于防爆密封腔的抽出式局部风机(以下简称抽出式风机)。

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