What is a Blower?
A blower is suitable for a variety of applications including ventilation, cooling, and exhausting. It is a device that enhances the air velocity by moving gas and air at low to high pressure.
You can easily use a blower for a specific function and it is best suitable when the pressure requirement falls between the compressor and fan. The mechanical device comes in many different types depending upon the flow capacity and operating pressure.
The purpose of a blower is to increase the airflow thereby removing contaminants including dust and dirt.
Types of Blowers
1. Positive Displacement Blowers
A positive displacement blower works for maintaining a constant flow and speed irrespective of the change in pressure. This makes it ideal for moving neutral and air gases.
It is highly effective and removes the gas through the decreasing section. In a simple way, a positive displacement blower will trap and release the air. The blower has a simple function and it comes in two different types.
a. Rotary Lobe Blowers
A rotary lobe blower is a type of positive displacement blower that comes with two spinning rotors. Here the rotors spin in opposite directions that suck in the air before pushing them out. It can produce high air volume which makes it ideal for vacuum systems. The rotary lobe blower goes with different types of blowers and requires less maintenance.
However, they do come with a disadvantage and can be very loud. Even the air pressure is very low making it suitable for limited applications. Another thing is that it is not energy efficient.
b. Helical Screw Blowers
Another type of positive displacement blower is the helical screw blower. It features two lobes where there is the main rotor. The rotor will go into the second rotor’s flute. It is the design of the helical screw blower that prevents the two rotors to come in contact with each other.
Compared to the rotary lobe blower, it can produce high air pressure. It can also operate quietly. Another great thing about helical screw blowers is that they are energy efficient and come in a sealed design. This makes sure there will be low chances for air leakage.
2. Centrifugal Blowers
Ideal for ventilation systems, a centrifugal blower helps in controlling air pollution and gas transportation. It is a common type of blower that lets you use it for ventilation purposes. It works by changing the direction of the airflow and turns in 90 degrees. With a centrifugal blower, there will be continuous gas transfer. While passing the gas through the centrifugal blower, increases the kinetic energy. You can easily use these types of blowers for various applications which require variable flow with high pressure. It features rotating impellers that help to discharge the gas.
3. Multistage Centrifugal Blowers
Multistage centrifugal blowers are a type of centrifugal blower that rotates the machine for increasing the air pressure. It has an electric motor that offers high-pressure tolerance. Even the flow rate is very high making it ideal for different applications. You can easily use a multistage centrifugal blower for different purposes including wastewater treatment industry, powering of artificial lungs, and landfill gas boosting.
4. High-Speed Blowers
When it comes to high-speed blowers, it offers high pressure and high flow. It is perfect for different purposes as it can offer a double suction. Equipped with a motor, it features impellers on each side. The directly coupled impellers let you connect it to a permanent magnet motor that has a variable frequency drive.
5. Regenerative Blowers
In a regenerative blower, you will find oil-free components that make it easy to maintain. You can easily use it for different applications that require low pressure. These types of blowers work by creating pressure by displacing the air molecules. It features impeller spins that will capture in between the blades. It works by having non-positive displacement which forces the air to move. The blower can be perfect for moving large air volumes and you can use it in sensitive environments.
How Do Blowers Work?
Blowers are suitable for a wide range of applications and offer many benefits. Whether it is cooling, ventilating, exhausting, or drying, it works by supplying cold or hot air. Blowers increase the air pressure or gas pressure with the help of a rotor. It takes the gas from the inlet valve and makes the impellers rotate. This makes the centrifugal force propels air. The blower will continuously compress gas with the increase in pressure.
Conclusion
We have seen the five different types of blowers and each of them has its own functionality. They all come with pros and cons and you need to see if it suits your purpose. As blowers are suitable for different applications, you need to see your usage. The above guide will let you have an insight into the different types of blowers and their functionality. As per your requirements and suitability, you should choose accordingly.
