Working principle and application fields of Roots blower
Roots blower, also commonly referred to as Roots blower, is a type of positive displacement blower. The following is a detailed explanation of the Roots blower:
1、 Main components
Roots blower is mainly composed of casing, impeller (rotor), wall panel, gears and other components. Among them, the impeller is the core component of the Roots blower, and its shape is usually involute or similar, such as an "8" shape.
2、 Working principle
The working principle of Roots blower is based on the synchronous rotation of two impellers. When the impeller rotates, the volume between impellers and between impellers and the casing will undergo periodic changes. Specifically:
Gas inhalation: At the inlet, due to the increasing volume (i.e. the space between the two impellers gradually expands), gas is inhaled.
Gas compression and transportation: As the impeller continues to rotate, the space between the two impellers gradually decreases, forming a closed chamber. During the rotation process, the size of this chamber remains unchanged, thereby pushing the inhaled gas from the intake port to the exhaust port without internal compression. At the exhaust port, due to the reflux of high-pressure gas on the exhaust side, the gas is further pressurized and discharged.
3、 Main features
1. Stable performance: Roots blower has a simple structure and is easy to manufacture. Due to the small gaps between impellers and between impellers and the casing, it can effectively increase gas pressure and flow rate.
2. Strong adaptability: Roots blower is suitable for gas transportation and pressurization in low-pressure environments, and can also be used as a vacuum pump. It has a wide range of conveying media, including clean air, clean coal gas, sulfur dioxide, and other inert gases.
3. Easy adjustment: By adjusting the speed and angle of the impeller, it is possible to control the gas flow rate and pressure.
4、 Application Fields
Roots blowers are widely used in various fields, such as metallurgy, chemical industry, fertilizer, petrochemical, instrument, building materials and other industries. In these industries, Roots blowers are commonly used in processes such as gas transportation, pressurization, and vacuum extraction.
5、 Type and selection
According to the shape of the rotor, Roots blowers are divided into two blade and three blade types. The three bladed rotor undergoes three suction and exhaust cycles with two rotors per rotation. Compared with the two leaf type, the three leaf type has lower gas pulsation, vibration, and noise. When choosing a Roots blower, comprehensive consideration should be given to specific application scenarios, gas properties, pressure requirements, and other factors.
In summary, Roots blower is a type of positive displacement blower with stable performance and simple structure, which has a wide range of application prospects and value.
