Large Roots blower
Large Roots blower is a typical positive displacement fan widely used in various industrial fields such as wastewater treatment, pneumatic conveying, vacuum packaging, ventilation, as well as power, chemical, food, etc. The following is a detailed introduction to large Roots blowers:
1、 Working principle
The working principle of a large Roots blower is based on volumetric variation. It works by the rotation of one or more impellers, which rotate in opposite directions within a sealed casing. When the impellers rotate, they continuously change the volume of gas, thereby pressing the gas from one place to another. Specifically, the Roots blower uses two blade shaped rotors to compress and transport gas in a cylinder through relative motion. The rotors are driven by a pair of synchronous gears and move in opposite directions, pushing the inhaled gas from the intake port to the exhaust port without internal compression. This design enables Roots blowers to generate higher pressure at lower speeds.
2、 Characteristics
1. High pressure: Due to its volumetric working principle, large Roots blowers can generate high outlet pressure, which is very helpful in applications that require high-pressure gas.
2. Stable flow rate: Due to the design of the impeller and the characteristic of mutual rotation, the flow rate of a large Roots blower is relatively stable and not affected by external conditions such as temperature, pressure, or changes in gas composition.
3. High efficiency and durability: Due to its simple and direct working principle, large Roots blowers have relatively high efficiency. Due to the lack of direct friction between the impeller and bearings, the wear of Roots blowers is minimal, resulting in a generally longer lifespan.
4. Easy maintenance: Due to its simple structure, the maintenance of large Roots blowers is relatively easy, reducing downtime caused by maintenance.
3、 Application Fields
1. In the field of environmental protection, the application of large Roots blowers is mainly reflected in sewage treatment and garbage incineration. Its stable air transport function helps to achieve processes such as sewage aeration and garbage incineration, thereby improving the efficiency and quality of environmental treatment.
2. In the power industry, large Roots blowers are mainly used for fuel transportation and combustion air supply in thermal power plants. Its air transport capacity can meet the large demand for air in thermal power plants, ensuring the stable operation of the power generation process.
3. In the field of chemical industry, large Roots blowers are widely used in various gas transportation and stirring processes in the chemical production process. Its stable performance can ensure the efficiency of chemical production.
4. In the food industry, large Roots blowers can be used for drying, ventilation, and stirring in the food production process. Its low noise and low vibration characteristics make the food production environment more comfortable, while improving product quality.
4、 Maintenance and upkeep
Regular maintenance is crucial to ensure the normal operation and prolong the service life of large Roots blowers. Here are some recommended maintenance methods:
1. Regular cleaning: Regularly clean the external and internal components of the Roots blower, such as sliding bearings, gears, and sliding surfaces. Use appropriate cleaning tools and agents to avoid the use of corrosive substances.
2. Lubrication management: Regularly lubricate the bearings and gears of the Roots blower to reduce friction and wear. Use the recommended lubricant and lubricate according to the manufacturer's instructions.
3. Good ventilation: Ensure that there are no obstructions around the Roots blower and avoid prolonged continuous operation to maintain a good ventilation environment and prevent overheating and overload.
4. Check the transmission system: Regularly inspect the transmission system of the Roots blower, including belts, chains, and gear transmission, to ensure its normal operation and promptly replace worn or damaged components.
5. Regular maintenance: Develop a regular maintenance plan based on the maintenance manual provided by the manufacturer. Including replacing filters, cleaning the cooling system, checking electrical connections, etc.
6. Temperature control: Roots blowers generate heat during operation and require reasonable temperature control. Ensure that the cooling system is functioning properly and avoid overheating causing malfunctions.
5、 Mainstream models and parameters
There are various mainstream models of large Roots blowers, such as 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, etc., with corresponding motor powers ranging from 0.75kw to 355kw. Specific parameters include flow rate and pressure rise, for example, the flow rate of the 50 type Roots blower is 0.78-2.48m3/min, and the pressure rise is 9.8kPa-58.8kPa; The flow rate of the 350 type Roots blower is 105.5-188.7m3/min, and the pressure rise is also 9.8kPa-58.8kPa. In addition, there are also high-pressure Roots blower series, such as 50H, 65H, 80H, etc., with a higher pressure range of 63.7kPa~98kPa.
In summary, large Roots blowers have been widely used in various industrial fields due to their stability, low noise, low vibration, and ease of maintenance. Through reasonable selection, correct use, and regular maintenance, the stable operation of large Roots blowers can be ensured to meet the needs of various industrial applications.
