Roots fan is a positive displacement fan, and its working principle and structural characteristics make it widely used in many fields. The following is a detailed introduction to roots fans:

1. Working principle

The working principle of roots fans mainly relies on two blade-shaped rotors (usually three-blade impellers) to make relative movements in the cylinder to compress and transport gas. The specific process is as follows:

Impeller rotation: When the motor drives one of the impellers to rotate, through the action of the synchronized gear, the other impeller will rotate synchronously at the same speed and in the opposite direction.

Gas intake and compression: Due to the extremely small gap between the impeller and the impeller, the impeller and the casing, and the impeller and the wall plate, a vacuum is formed at the air inlet during the rotation of the impeller, and the air is sucked into the intake cavity under the action of atmospheric pressure. As the impeller continues to rotate, two of the blades of each impeller form a sealing cavity with the wall plate and the casing, and the air from the intake cavity is continuously brought to the exhaust cavity by the sealing cavity formed by these two blades. And because the impellers in the exhaust cavity are meshed with each other, the air between the two blades is squeezed out.

Gas Discharge: After continuous inhalation and squeezing, air is continuously transported from the air inlet to the outlet, completing the entire gas delivery process.

2. Structural characteristics

Roots fan is composed of five parts: casing, wall plate, impeller, fuel tank and muffler, with the following characteristics:

Simple structure: Roots fan has a compact structure and is easy to manufacture.

Low vibration and low noise: Due to the use of three-blade rotor structure and reasonable structure of the air outlet in the shell, the fan has low vibration and low noise.

Long-lasting performance: The impeller and shaft are integral and the impeller is wear-free, and the fan performance is long-lasting and can run continuously for a long time.

High volumetric efficiency: the fan has a large volume utilization rate and high volumetric efficiency.

flexible installation method: compact structure, flexible and changeable installation method, complete models, can meet the needs of different users for different purposes.