Comparative analysis of Roots blower and vortex blower
Roots blower and vortex blower are two commonly used gas conveying equipment in the industrial field, and they have significant differences in structure, working principle, performance characteristics, and application scenarios. The following provides a detailed comparison in terms of core principles, performance parameters, application areas, and advantages and disadvantages:
1、 Core principles and structural differences
1. Roots blower
Working principle: It belongs to a positive displacement fan, which uses two three bladed rotors to rotate synchronously in the opposite direction inside the cylinder, forming a volume change to achieve gas compression and transportation.
Structural features: There is no direct contact between rotors, relying on precision gap sealing, simple structure, and high manufacturing accuracy requirements.
2. Vortex fan
Working principle: It belongs to a turbine fan, which generates centrifugal force through the rotation of the impeller, forming a circulating airflow in the pump body to achieve gas pressurization.
Structural features: The impeller is composed of dozens of blades, similar to a gas turbine impeller, with a compact structure, small volume, and light weight.
2、 Performance parameter comparison
1. Parameters Roots blower vortex blower
2. Pressure range: high pressure (up to 196kPa), medium low pressure (usually ≤ 101kPa)
3. Large air volume range (0.15-1200m3/min) Medium air volume (40-3000m3/h)
4. High noise level (due to periodic suction and exhaust pulsation) and low noise level (smooth rotation of impeller)
5. Low energy efficiency (volumetric compression consumes more energy) High energy efficiency (turbine compression consumes less energy)
6. Regular replacement of lubricating oil and inspection of gear wear are required for maintenance. Maintenance is simple and basically maintenance free
3、 Comparison of application fields
1. Roots blower
Applicable scenarios:
High pressure gas conveying (such as pneumatic ash conveying, sewage treatment aeration)
Chemical industry (gas pressurization, reactor gas supply)
Aquaculture (oxygenation)
Advantages: High pressure stability, wide flow regulation range, and adaptability to harsh working conditions.
2. Vortex fan
Applicable scenarios:
Medium and low pressure gas transportation (such as ventilation and drying equipment)
Printing industry (paper adsorption, ink drying)
Food processing (vacuum packaging, material transportation)
Advantages: Small size, low noise, flexible installation, and low cost.
4、 Summary of advantages and disadvantages
1. Roots blower
advantage:
High voltage stability, suitable for long-distance transportation
Simple structure and high reliability
Disadvantages:
High noise and energy consumption
Large volume, high installation space requirements
2. Vortex fan
advantage:
Small size, light weight, easy installation
Low noise, smooth operation
Disadvantages:
Low pressure, limited applicability
Performance degradation under high temperature environment
5、 Selection suggestions
1. Choosing Roots blower: Roots blower is more suitable for high-pressure gas transportation (such as pneumatic ash conveying, sewage treatment), high flow stable gas supply (such as aquaculture oxygenation), or harsh working conditions (such as high temperature and high dust).
2. Choosing a vortex fan: If you need medium and low-pressure gas delivery (such as ventilation, drying equipment), noise sensitive environments (such as food processing, printing industry), or space constrained scenarios, vortex fans have more advantages.
conclusion
Roots blower and vortex blower have their own advantages and disadvantages, and the selection should be based on specific operating conditions. Roots fans are suitable for high-pressure, high flow, and stable gas supply scenarios, while vortex fans are more suitable for medium and low-pressure, noise sensitive, and space limited applications.
