Functions of Roots blower [Detailed explanation]

Roots blower is a positive displacement fan, with impeller end face, fan front and rear end covers. The principle is a rotary compressor that uses two blade rotors to make relative movement in the cylinder to compress and transport gas. This kind of blower has simple structure and is easy to manufacture. It is suitable for gas transmission and pressurization in low pressure occasions and can be used as a vacuum pump. Now we will learn about the relevant characteristics of Roots blower in detail.

Roots blower is a kind of volumetric fan. There are two three blade impellers rotating relatively in the space sealed by the casing and wall plate. Because each impeller uses involute or the envelope of cycloid as the impeller processing profile, the three blades of each impeller are identical, and the two impellers are identical, which greatly reduces the processing difficulty. Numerical control equipment is used during impeller processing to ensure that no matter where the two impellers are rotated, a certain minimum clearance can be maintained under the condition that the center distance between the two impellers is constant, so as to ensure that the gas leakage is within the allowable range.

Due to the adoption of the three blade rotor structure and the reasonable structure at the inlet and outlet of the housing, the fan has low vibration and noise. The impeller and shaft are of integral structure, and the impeller is free of wear. The performance of the fan is permanent and can operate continuously for a long time. The fan has large volume utilization rate, high volume efficiency, compact structure and flexible installation mode. The selection of bearings is more reasonable, and the service life of each bearing is even, thus extending the life of the fan! The fan oil seal is made of imported fluororubber material, which is high temperature resistant, wear-resistant and has a long service life. Complete models can meet the needs of different users for different purposes.

Roots blower can be roughly divided into single-stage blower and two-stage blower according to different working modes. The blower with only one compression stage is called single-stage blower, while the blower with two single-stage blowers connected in series to compress gas twice in a row is called two-stage blower. Roots blower must be operated, installed and debugged in accordance with the relevant instructions of the equipment during use.