A Roots rotary lobe blower, often just called a Roots blower, is a type of positive displacement pump that moves gases or air by trapping a fixed volume between rotating lobes and pushing it out. It’s used in various industrial applications to provide a relatively constant flow of air or gas at varying pressures.
Here’s a more detailed explanation:
What it is:
A Roots blower uses two rotating lobes (also called rotors or impellers) within a casing to displace gas.
These lobes don’t touch each other or the casing, minimizing wear and tear.
The rotation traps a fixed volume of gas between the lobes and the casing, carrying it from the inlet to the outlet.
This video explains the design and operation of a rotary lobe pump (Roots blower):
How it works:
Intake:As the lobes rotate, they create a vacuum, drawing gas into the blower through the inlet port.
Trapping:The rotating lobes trap a pocket of gas as they turn.
Displacement:The trapped gas is carried around the casing to the outlet port.
Discharge:The gas is then forced out of the outlet, against the system’s pressure.
Key Features and Benefits:
Positive Displacement:
Delivers a relatively constant volume of gas, regardless of pressure changes.
High Efficiency:
Maintains high efficiency over a wide range of flow rates.
Versatility:
Suitable for various industrial applications requiring consistent airflow, such as wastewater treatment, pneumatic conveying, and combustion processes.
Roots Blower Improvement:
Whispair Blowers reduce pulsations and shock loads by slowly pressurizing the trapped gas to discharge conditions.
Low Maintenance:
Roots blowers are known for their reliability and low maintenance requirements.
Applications: Wastewater treatment plants, Pneumatic conveying systems, Combustion processes, Fly ash and lime conveying in power generation, and Fish farming.
Historical Context:
Named after the inventors, brothers Philander and Francis Marion Roots.
Patented in 1860, with the basic design still in use today.
