回转式风机，又叫滑片鼓风机，是容积式风机的一种，因为其低噪音的特性，也被成为低噪音回转风机。回转鼓风机是众多风机的一种类型，是一种经过压缩空气来完成曝气的风机，所以又名曝气鼓风机。它主要由电机、空气过渡器、鼓风机本体、空气室、底座(兼油箱)、滴油嘴六部份构成。鼓风机靠汽缸内偏置的转子偏心作业并使转子槽中的叶片之间的容积改变将空气吸入、压缩、排出。
Rotary fan, also known as sliding vane blower, is a kind of volumetric fan. Because of its low noise characteristics, it is also called low noise rotary fan. Rotary blower is a type of many fans. It is a kind of fan that completes aeration through compressed air, so it is also called aeration blower. It is mainly composed of six parts: motor, air transition device, blower body, air chamber, base (and oil tank), and drip nozzle. The blower works by eccentric rotor in the cylinder and changes the volume between the blades in the rotor slot to suck in, compress and exhaust the air.
回转式风机是现在比较常见的类型，具有体积小、风量大，低噪音、安装方便、耐久性强、运行平稳、低廉等特点，回传式鼓风机主要用于小型污水处理。污水处理为什么会用到回转鼓风机呢，小型水处理多采用活性污泥法，这种处理方法需氧性生物进行处理，在处理过程中，须确保水中有一定量的溶解氧，达到维持微生物生命活动的目的，回转式风机在其中起到增氧的作用。
Rotary fan is a common type now, with small volume, large air volume, low noise, convenient installation, strong durability, stable operation and low price. Rotary fan is mainly used for small sewage treatment. Why is rotary blower used for sewage treatment? Activated sludge method is often used for small water treatment. This treatment method is aerobic biological treatment. During the treatment process, it is necessary to ensure that there is a certain amount of dissolved oxygen in the water to maintain the life activities of microorganisms, and rotary blower plays a role in increasing oxygen.

 
在回转风机用途表述中，有好多关于回转风机的用途说明，但是，回转风机除了用于水处理曝气，还有在医院、实验室、电镀槽搅拌中运用比较多，在其他行业，比如印刷业送纸、工业废水搅拌、塑焊及吹风气源供应、燃烧器喷雾、玻璃工业等这些方面，运用比例还是少的多。横向比较，现在用低噪音回转风机的较多的，当属农村和小区污水处理，也常被用于一体化污水配套。
In the description of the use of rotary fans, there are many descriptions about the use of rotary fans. However, in addition to water treatment and aeration, rotary fans are also used more frequently in hospitals, laboratories, and electroplating tank mixing. In other industries, such as paper feeding in the printing industry, industrial wastewater mixing, plastic welding and air supply for blowing, burner spray, glass industry, etc., the proportion of application is much less. In horizontal comparison, most of the low-noise rotary fans are used for rural and residential sewage treatment, and are often used for integrated sewage matching.
回转风机运转时，鼓风机靠汽缸内偏置的转子偏心运转，并使转子槽中的叶片之间的容积变化将空气吸入、压缩、吐出，各部件之间相互摩擦产生摩擦热。风机在运转中，利用鼓风机的压力差自动将润滑油送到滴油嘴。由滴油嘴往汽缸体内滴入必要的润滑油，使摩擦表面润滑，以减少摩擦热和摩擦噪音；并使部件之间形成一层油膜，保持风机的密封性，同时可保持汽缸内气体不回流。这是回转风机润滑油的作用。
When the rotary fan is running, the blower operates eccentrically by the biased rotor in the cylinder, and the volume change between the blades in the rotor slot will suck in, compress and spit out the air, and the friction heat will be generated by the friction between the components. When the fan is running, the pressure difference of the blower is used to automatically send the lubricating oil to the drip nozzle. Drip necessary lubricating oil into the cylinder body from the oil drip nozzle to lubricate the friction surface to reduce friction heat and friction noise; A layer of oil film is formed between the components to maintain the tightness of the fan and keep the gas in the cylinder from flowing back. This is the function of lubricating oil for rotary fan.