The working principle of two-lobe Roots blower and three-lobe Roots blower, including spare parts and the structure of the blower is the same, the main difference is that the impeller structure inside the pump head is different.

The use of two lobes is two impellers, the use of three lobes of three impellers, due to the difference in the impeller, it also caused the difference in the performance of the two machines.

1. In the case that the center distance and the outer circle radius are the same, the displacement of the three-lobe Roots blower with the arc lobe is larger than that of the two lobes. The displacement of involute lobe Roots blower is not related to the number of rotor heads.

2. The mechanical properties of the three-lobe rotor are better, which is better than that of the two-lobe rotor to ensure the clearance between the impeller and the impeller and the casing.

3. The characteristics of the two-lobe roots blower are that the air outlet is large, the noise is higher, and the stability of the operation is not as stable as that of the three-lobe.

4. The advantage of the three-lobe roots blower is that the operation is stable and the noise value is a little lower than that of the two-lobe blower, and this type is currently used more.

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