What is a Roots blower
Roots blower is a common centrifugal fan widely used in industrial and civilian fields. The following is a detailed introduction to Roots blower:
1、 Working principle
Roots blower is a type of positive displacement blower, which works by separating the air inlet through the engagement of a pair of rotors (with a gap between the rotors but not in contact with each other). The rotor is driven by a pair of synchronous gears and moves in the opposite direction, pushing the inhaled gas from the intake port to the exhaust port without internal compression. Specifically, Roots blowers use two or three blade shaped rotors to make relative motion within the cylinder to compress and transport gas. The air volume conveyed by this blower is proportional to the number of revolutions, and there is always a small gap between the impeller end face and the front and rear end covers of the fan, as well as between the fan impellers. Under the drive of the synchronous gear, wind is transported from the inlet of the fan along the inner wall of the casing to the side where it is discharged.
2、 Structural composition
The Roots blower is mainly composed of a casing, impeller, motor, and transmission device. Among them, the impeller is the core component of the Roots blower, which generates airflow through rotation to achieve the transportation and discharge of air. The motor provides power to drive the rotation of the impeller, while the transmission device plays a role in connecting and transmitting power. In addition, the Roots blower also includes wall panels, fuel tanks, mufflers, and other parts. The casing mainly plays a supporting and fixing role; Wall panels are used to connect the casing and impeller, support the rotation of the impeller, and provide end face sealing effect; The oil tank is used to store lubricating oil for lubricating gears and bearings; Silencers are used to reduce the noise generated by airflow pulsation during the inlet and outlet of Roots blowers.
3、 Application Fields
Roots blowers have a wide range of applications, including but not limited to the following aspects:
1. Wastewater treatment and aeration: Roots blowers provide necessary oxygen during the wastewater treatment process to assist microorganisms in aerobic respiration, thereby purifying water quality.
2. Exhaust gas treatment: In the exhaust gas treatment system, Roots blower is used to transport the exhaust gas to the treatment equipment for purification treatment.
3. Fuel atomization: In tunnel ceramic kilns, vertical magnesia kilns, and glass pool furnaces, Roots blowers are used to atomize fuel and improve combustion efficiency.
4. Pneumatic ash conveying: In thermal power plants, Roots blowers compress gas to transport and process ash into the ash silo.
5. Aquaculture oxygenation: In large-scale fish and shrimp farms, Roots blowers inject gas into the aquaculture ponds to increase the oxygen content in the water and promote fish and shrimp growth.
6. Chemical raw material transportation: Roots blowers are used in the chemical industry to transport chemical raw materials, reaction gases, etc.
4、 Characteristics and advantages
1. Simple structure: Roots blower has a simple structure, easy manufacturing, and easy maintenance.
2. Large conveying air volume: The air volume conveyed by the Roots blower is proportional to the number of revolutions, and the air volume can be adjusted as needed.
3. Forced gas delivery: Roots blowers have the characteristic of forced gas delivery and are suitable for gas delivery and pressurization systems in low-pressure environments.
4. Low noise: Due to the use of a three blade rotor structure and a reasonable structure at the inlet and outlet of the casing, the Roots blower has low vibration and noise.
In summary, Roots blower is a powerful and widely used centrifugal fan. By understanding its working principle, structural composition, application fields, characteristics and advantages, one can better understand and apply this device.
