Types of Air Blower

A blower is a piece of machinery that quickens the rate at which air moves through it. In order to accomplish some other goal, the blower is simply a piece of machinery that can raise the pressure of gas or air from a lower to a higher level. A wide variety of industries, such as cooling, conveying, ventilating and exhausting as well as others, rely on blowers to perform these and other activities. Blowers are most effective when used in pressure ranges that fall in between those covered with fans and compressors.  In this article we will discuss the different types of air blower. 

  • Types of Bowler:

The following are common types of blowers. 

  • Positive Displacement Blowers
  •  Rotary Lobe Blowers
  • Helical Screw Blowers 
  •  Centrifugal Blowers 
  •  Multistage Centrifugal Blowers 
  •  High-Speed Blowers 
  • Regenerative Rotary lobe blowers 

  • Blowers with Positive Displacement: 

Air or neutral gas can be used with positive displacement blowers, which operates in a straightforward manner. The blower takes air or gas in through an expanding portion on one side and expels it through a contracting section on the other. 

As air is forced out through the narrowing side, the pressure in the surrounding space rises because of the positive displacement caused by the air’s movement. This type of blower is distinguished by maintaining a constant airflow velocity despite variations in atmospheric pressure. 

  • Rotary Lobe Blowers, Version: 

The rotary lobe blower is one type of positive displacement fan. It functions thanks to a pair of rotors that spin in the opposite directions. The air is sucked into the blower and then rotated by the lobes before being propelled outward. 

These blowers are great for bigger vacuum systems due to their high air output and rotary lobe design. The air pressure produced by such blowers is quite modest (about 15 psi), as they are typically utilized for tasks like deoxygenating aeration tanks.

  • Blowers with Helical Screws:

Every helical screws blower has a primary rotor with two lobes. This rotor can fit into another rotor’s flute. The pair of rotors rotates in a perfect helical sequence to avoid accidental accidents. Helical screw blowers often produce higher pressure air than rotary lobe blowers. 

They produce less noise than rotary lobe blowers while still producing adequate airflow. Energy efficiency is not the only benefit of these intricate fans. Because of their airtight design, helical screw blowers produce a steady stream of air with minimal loss. Helical screw blowers are capable of transferring either gas or air, depending on the situation. 

  • Radical Blowers: 

The most common type of blower seen in ventilation systems is the radial blower. They also help regulate air quality and transport gas. This blower increases the velocity and volume of the air stream as it passes past the rotating impellers. The direction of a wind current can be significantly altered by using diffusers.

Before leaving the blower, the air and gas enter the fan wheel, makes a 90-degree spin, and speeds up. For continuous gas flow, a radially blower is the best option. Gases increase in dynamic energy as they pass through a diverging blower. When gas exits the diffusive blower, fresh gas is sucked in to maintain a constant pressure. 

This blower is put to use in the creation of pressure, the distribution of air, and the creation of attractions. It is great for producing high strain from low air volumes and can handle high tension. It can be used to power artificial lungs, test gas meters, or circulate air in a fish tank.

  • Quick Bowlers:

If you require a blower with a significant amount of pressure and flow, you should search for one that has a rapid rate of operation. These electrical fans are powered by a motor. They accomplish the dual suction by employing twin impellers, one on both ends of the shaft of the device. High-velocity blowers are able to produce pressures that can reach up to 25 psi and discharge volumes that can reach up to 15,000 m3 hourly.

  • High Speed Bowlers: 

High-speed blowers are machines that move air at a rapid pace and are powered by motors. They are capable of producing high air pressure (up to 25 psi) and high air flow (up to 15,000 m3 / hour). 

To generate a vacuum-like effect, high-velocity blowers, that are analogous to centrifugal blowers, have impellers positioned on opposite sides of the device. These direct-coupled impellers are also linked direct to a synchronous motor that has a permanent magnet and can be controlled using a variable speed motor (VFD). This allows the impellers to operate at high speeds while still maintaining the ability to regulate the flow.

  • Regenerated Bowlers:

If you need to move a lot of air at a low pressure, a regenerative blower is what you need. Oil-free parts on regenerative blowers make them not only low-maintenance but also safe for use in sensitive settings like those found in the beverage, food, and medical industries. 

By dislodging air molecules, regenerative blowers generate pressure. Air is sucked in when the impeller spins and trapped between the blades. When the impeller is in motion, air pushes forward and then flows back toward its origin. The air is transported by the blower by non-positive displacement, which entraps the air and then propels it forward. 

  • Centrifugal Fans and Blowers: 

The use of centrifugal blowers is almost always recommended wherever conditions calling for either high pressure or variable flow are present. These blowers have impellers that spin, which causes the air or gas that travels through them to do so at a significantly faster rate.  

In addition, the air enters the blower at a certain speed, spins the fan wheel through 90 degrees, and then exits the blower at a significantly faster speed. This blower is ideal for ensuring that there is a continuous flow of gas. Once the gas has been let out of the blower, the pressure within the chamber does not change since the gas’s velocity rises as it travels through the chamber.