What is the working principle of Roots blower?

Roots blower realizes gas suction, compression and discharge through special screw structure. The following are its specific operating principles:

Twin screw structure: Roots blower contains two orthogonal rotating screws, one called the main rotor and the other called the slave rotor. The two screws engage with each other through gears, but do not contact directly. This twin screw structure is the key feature of Roots blower.

Aspiration process: when the main rotor and the rotor start to rotate, they create a series of working chambers in the tank. In the process of screw rotation, the chamber gradually expands, thus reducing the pressure of internal gas. The gas enters the enlarged chamber through the air inlet and is sucked in due to the pressure difference.

Gas compression: As the screw continues to rotate, the chamber gradually shrinks. This will cause the inhaled gas to be compressed in the chamber, reducing its volume and gradually increasing its pressure. The gears of the main rotor and the slave rotor are matched to ensure that the gas is continuously compressed during the screw rotation.

Exhaust process: when the gas is compressed to a certain pressure, it will be pushed to the gas outlet. The air outlet is located on the other side of the can body. During the rotation of the screw, the gas is gradually discharged to the air outlet, and then released to the external environment.

Continuous circulation: the screw structure and operation mode of Roots blower enable it to continuously conduct suction, compression and exhaust circulation. This continuous cycle produces a stable gas flow and pressure.

To sum up, Roots blower works in the cycle of suction, compression and exhaust through two orthogonal rotating screws. Its unique working principle makes it suitable for a variety of fields, including wastewater treatment, dust control, ventilation and gas transmission.

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