Rotary Roots blower is a centrifugal fan commonly used for exhaust and pressurization. The following is a detailed introduction to it:
1、 Working principle
The working principle of the rotary Roots blower is based on the Roots compression principle. When the fan blades rotate, a dual rotating airflow is generated, which achieves gas compression and discharge through continuous alternation of suction and discharge ports. Specifically, two leaf shaped rotors undergo relative motion (also known as synchronous meshing motion) within the cylinder. Within the working volume formed by the concave surface of the rotor and the inner wall of the cylinder, gas is drawn in during the rotation of the rotor. Subsequently, when it moves to the vicinity of the exhaust port, the pressure in the working volume increases sharply due to the reflux of high-pressure gas, ultimately delivering the gas to the exhaust channel.
2、 Structural composition
Rotary Roots blower is usually composed of components such as casing, rotor, Roots gear, etc. Among them, the casing is used to fix and support the rotor, which is the core component of the Roots blower. Its dual rotating airflow achieves gas compression and discharge. And Roots gear is a key component used to drive the rotor for operation. The entire structure is compact, operates smoothly, and is easy to maintain.
3、 Performance characteristics
1. Stable gas delivery: The rotary Roots blower can provide stable gas delivery and pressurization effects during operation, and can adapt to the requirements of different working conditions.
2. Low noise: Due to the continuous alternation of gas compression and discharge, the noise generated by the fan during operation is relatively small, which can effectively reduce the impact of environmental noise on personnel and equipment.
3. Simple structure: Roots blower has a compact structure and easy manufacturing, making it very suitable for gas transportation and pressurization tasks under low pressure conditions.
4. Convenient maintenance: The Roots blower has a simple structure and is also relatively easy to maintain. Operators only need to regularly check the lubricating oil and clean the air inlet to maintain the normal operation of the fan.
5. Long service life: The rotary Roots blower adopts high-quality materials and manufacturing processes, and has a long service life.
4、 Main performance parameters
1. Airflow: Refers to the amount of gas that the fan blades can transport per unit time. The size of the air volume depends on the structure and speed of the fan, usually expressed in cubic meters per hour (m3/h) or standard cubic meters per hour (Nm3/h).
2. Pressure: represents the power required to compress gas. The magnitude of pressure depends on the structure, air volume, and speed of the fan.
3. Rotational speed: Refers to the rotational speed of the fan blades. The speed depends on the power of the motor and the process requirements.
4. Power: Refers to the output power of the fan motor. The magnitude of power depends on the torque, speed, air volume, and pressure required for the movement of the fan blades.
5. Noise: Refers to the noise level during the operation of the fan. The magnitude of noise depends on the acoustic characteristics of fan movement and air flow.
5、 Application Fields
Rotary Roots blowers are widely used in various fields due to their unique working principle and advantages, including:
1. Wastewater treatment: Roots blowers are often used for air flotation sludge mixing, aeration, blowing, and other processes. Roots blower can provide continuous and stable airflow, keeping the floating sludge suspended and effectively promoting the release of harmful gases and microbial metabolism.
2. Waste gas treatment: Roots blower has strong exhaust capacity and stable airflow generation ability, which can collect industrial waste gas and send it to treatment equipment for purification treatment.
3. Paper industry: Roots blowers can provide a large amount of hot air and have constant air pressure and volume characteristics, which can quickly and effectively evaporate the moisture on the surface of wet paper, accelerate the drying process of paper, and improve production efficiency.
4. Welding and cutting: Roots blower can provide strong exhaust capacity, timely discharging harmful gases and dust generated outdoors.
5. Food processing: Roots blowers are widely used in grain storage, material transportation, vacuum dehydration, and other processes. Roots blowers can provide stable negative pressure to dehydrate grains, preventing mold and spoilage.
6. Industrial boiler: Roots blower can provide a large amount of air and has a high outlet pressure, which can meet the air supply needs of industrial boilers.
6、 Advantages and disadvantages
advantage:
1. The gas delivery capacity is relatively stable and can provide a constant gas flow rate.
2. The energy efficiency performance under low load conditions is better than that of centrifugal fans.
3. The structure is relatively simple, with a low failure rate and easy maintenance.
Disadvantages:
1. In high-pressure environments, the efficiency of rotary Roots blowers may not be as good as centrifugal blowers.
2. When dealing with high-temperature gases, special consideration needs to be given to the selection and design of materials.
In summary, the rotary Roots blower plays an important role in multiple fields due to its unique working principle and advantages. In practical applications, rotary Roots blowers should be selected and used reasonably according to specific needs to improve production efficiency, reduce energy consumption, and bring greater economic benefits to enterprises.
