The working principle of Rotary Roots blower is based on the principle of volumetric compressor, which uses two blade shaped rotors to compress and transport gas through relative motion in the cylinder. This type of blower has a simple structure and is easy to manufacture. It is widely used in fields such as aquaculture oxygenation, sewage treatment aeration, cement conveying, etc. It is more suitable for gas conveying and pressurization systems in low pressure situations, and can also be used as a vacuum pump. The rotor of a Roots blower consists of an impeller and a shaft, which can be divided into linear and spiral types. The impeller has two or three blades. Through the action of a pair of synchronous gears on the main and driven shafts, the impeller rotor synchronously rotates in the opposite direction at a constant speed, inhaling gas from the inlet. The airflow is then compressed into the chamber through the rotating rotor, and as the volume of the rotor inside the chamber decreases, the gas is discharged under pressure and sent into the pipeline or container. The characteristic of Roots blower is that when the pressure is adjusted within the allowable range during use, the flow rate changes very little, and the pressure selection range is wide, which has the characteristic of forced gas transmission. Due to the small assembly gap between the two rotors and the casing during the manufacturing of Roots blowers, the phenomenon of gas reflux during the compression process is relatively small, and the pressure is higher than other forms of blowers. According to operational requirements, the pressure can vary within a certain range, but the volumetric flow rate remains unchanged. Therefore, Roots fans are particularly suitable for working conditions that require small gas transmission and stable flow rate.