In depth interpretation of the working principle of high-speed Roots blower
A high-speed Roots blower is a type of positive displacement blower, which mainly relies on the relative motion of two blade rotors (usually three bladed impellers) in the cylinder to compress and transport gas. The following is a detailed analysis of the working principle of high-speed Roots blower:
1、 Basic Structure
The high-speed Roots blower is mainly composed of components such as the casing, impeller, bearing box, and gearbox. Among them, the impeller is the core component of the Roots blower, usually consisting of two three bladed rotors that are driven by synchronous gears to rotate at a constant speed in opposite directions.
2、 Working principle
1. Impeller rotation: When the motor drives one of the impellers to rotate, the other impeller will rotate synchronously at the same speed and in the opposite direction through the action of the synchronous gear.
2. Gas suction and compression: Due to the gaps between impellers, impellers and casings, and impellers and wall panels, a vacuum state is formed at the inlet during the rotation of the impeller, and air is sucked into the inlet chamber under atmospheric pressure. As the impeller continues to rotate, two of the blades of each impeller form a sealed chamber with the wall panel and casing, and the air in the intake chamber is continuously carried to the exhaust chamber by the sealed chamber formed by these two blades. Also, because the impellers in the exhaust chamber are interlocked, the air between the two blades is squeezed out.
3. Gas exhaust: Through continuous inhalation and compression, air is transported from the inlet to the outlet on site, completing the entire gas transportation process.
3、 Characteristics and advantages
1. Forced gas delivery: When the outlet resistance of the blower varies within a certain range, it has little effect on the conveying air volume, and gas delivery is mandatory. When the resistance of the process system increases and the working speed remains constant, it can only cause an increase in the load on the motor, without a significant decrease in the amount of air transported.
2. Simple structure: Roots blower has a simple structure, stable operation, high efficiency, the rotor does not require lubrication, and the gas transported is pure and dry.
3. Long lasting performance: The three bladed impeller structure ensures minimal vibration, low noise, and consistent performance of the fan, allowing for long-term continuous operation.
4. High volumetric efficiency: The fan has a high utilization rate of volume, high volumetric efficiency, compact structure, and flexible installation methods.
4、 Application Fields
High speed Roots blowers are widely used in various fields such as aquaculture oxygenation, sewage treatment aeration, cement conveying, pneumatic conveying, flue gas desulfurization and denitrification, ventilation, etc. The characteristics of forced gas transmission and stable performance make Roots blowers play an important role in these fields.
In summary, the working principle of high-speed Roots blower mainly relies on the relative motion of two three bladed impellers in the cylinder to compress and transport gas. Its simple structure, long-lasting performance, and high volumetric efficiency make Roots blowers widely used in multiple fields.
