Roots blowers play an important role in negative pressure conveying systems, as they generate negative pressure to transport and process materials. The following is a detailed explanation of the negative pressure conveying of Roots blower:
1、 Working principle
Roots blower, also known as Roots blower, is a type of volumetric rotary blower. It is mainly based on the non-contact screw working principle or the relative motion of two blade rotors in the cylinder. When the motor drives one of the impellers (or rotors) to rotate, the other impeller (or rotor) will rotate synchronously at the same speed and in the opposite direction through the action of the synchronous gear. During the rotation of the rotor, when the gas brought in from the suction port moves to the vicinity of the exhaust port, the pressure in the working volume suddenly increases due to the reflux of high-pressure gas, and then the gas is transported to the exhaust channel. Due to the gaps between impellers, impellers and casings, and impellers and wall panels, a vacuum state is formed at the inlet of the Roots blower, resulting in negative pressure. This negative pressure environment causes the materials in the storage bin or container to be subjected to the action of external atmospheric pressure, thereby being sucked into the intake duct of the fan.
2、 Application Fields
The Roots blower negative pressure conveying system is widely used in multiple industries, including but not limited to:
1. Grain processing: used for processes such as grain storage, ventilation, and transportation.
2. Feed processing: Achieving negative pressure conveying of raw materials in the feed production line.
3. Chemical industry: used for the transportation, mixing, and other processes of chemical raw materials.
4. Building materials industry: plays an important role in the production and transportation of building materials such as cement and gypsum.
5. Environmental protection industry: used for aeration, stirring and other processes in sewage treatment systems, as well as for the collection and treatment of dust and waste gas.
6. Mine ventilation: providing necessary ventilation and gas transportation for mines.
3、 Advantages and Characteristics
Compared with other types of fans, Roots blowers have the following advantages in negative pressure conveying:
1. Low noise: The screw structure design or rotor movement mode of Roots blower makes it operate with low noise, suitable for occasions with high noise requirements.
2. Oil free lubrication: The working principle of Roots blower determines that it does not require lubricating oil inside, so it does not need regular maintenance, and the output airflow has high purity.
3. High conveying efficiency: Roots blowers can provide stable and continuous airflow, ensuring smooth conveying of materials in pipelines and improving conveying efficiency.
4. Compact structure: Roots blower has a compact structure and is easy to manufacture, suitable for conveying and pressurization in low-pressure environments.
4、 Usage and maintenance
1. Usage requirements: When using the Roots blower, it is necessary to ensure that the inlet medium temperature does not exceed the specified value (such as 40 ℃), and that the particle impurity content and size meet the requirements. At the same time, necessary inspection work should be carried out before starting, such as opening the intake, exhaust, and bypass control valves, and checking whether the air filter is unobstructed.
2. Maintenance: Regular maintenance is required to ensure the normal operation and prolong the service life of Roots blowers. This includes checking the status of inlet and outlet valves and bypass pipes, adjusting rotor clearances, replacing sealing devices and filters, etc.
In summary, Roots blower, as a commonly used negative pressure conveying equipment, has important application value in industrial production. Its unique working principle and advantages make it have broad application prospects in multiple fields.
