An industrial air blower is one of the common devices that is used to move and deliver the pressurized air with increased flow rate to the application that it serves for, in order to facilitate the cooling or ventilating purposes, etc.
The industrial air blower is driven by the electric motor, which means that it is operated with the electric energy being transformed into the kinetic energy, so as to advance the movement as well as provide pressure to the air or gas. With the repeating of this cycle, the pressurized air or gas would be sent out to perform their works.
We can commonly see the handheld air blowers on the markets, which are the devices that are used for blowing the fallen leaves and the dirt or debris with the pressurized air or gas, and accumulating them for easier cleaning process.
These air blowers come in various sizes and forms in order to accommodate to the areas they are applied for, while most of them are portable as they are usually held by the hands of the operators.
However, the industrial air blowers are larger in sizes and heavier in weights, and are thus capable of working for higher loads and wider range of applications, such as for the cooling and ventilating of the environments, combustion air supplies, pneumatic conveying, or sewage aeration, to name a few.
The industrial air blowers can be separated into two types depending on their construction and how they are operated, including the centrifugal blowers and the positive displacement blowers.
The centrifugal blowers are usually comprised of multistage construction, which includes an inlet, a motor, a rotor shaft, multiple impellers and diffusers, and an outlet.
The inlet and the outlet are arranged on the opposite sides respectively, and are in charge of accumulating and releasing the air and gas once their flow rate and pressure are increased.
The motor is driven when the power supply is offered, and it would facilitates the other components to be operated, in order to conduct their duty one after another.
The rotor shaft penetrates through the multiple impellers and diffusers, which rotates to push the air or gas to move, and causes the movements of impellers and diffusers as well.
The impellers and diffusers are arranged in a raw, which wrap around the rotor shaft. They are driven by the rotating of the rotor shaft, and provides the centrifugal force to the air or gas that passes through them.
As the air or gas passes, the velocity and pressure of the air or gas would be gradually increased, so as to achieve what the centrifugal blower is supposed to do.
The positive displacement blowers are like the positive displacement pumps, and the most common type of them are the rotary lobe blowers, which also apply the rotating rotors to produce high pressure of the flowing media and deliver to the applications they serve for.
Instead of the stages that include a series of impellers and diffusers, a positive displacement blower is comprised of two lobe shaped rotors inside the chamber of blower.
In addition, there is not only one shaft that penetrates through the other components in this type of blower. In fact, there are two separate shafts in the middle of the lobes respectively.
During the operation, the two lobes would rotate at the same time to generate pressure to the air or gas, but would not come in contact with each other, which reduce the possibility for the blower to wear.
Besides, compared to the centrifugal blowers, the positive displacement blower are capable of providing higher pressure to the media that flow through them, which makes it the determining factor that the manufacturers choose the latter over the former.
In the industrial fields, the blowers and the fans are often mentioned and compared together, as they are both dedicated to ”blow” the air or gas to the applications that they work for.
One of the similarity between these two types of devices is that they can both be centrifugal form, which utilizes the centrifugal force that is made when the impellers and the diffusers rotate to increase the pressure of the air or gas.
However, as they own different names, they are actually different from each other, and the variation between them can be seen in how much pressure they are able to provide for the air or gas, and thus leads to the varied applications that they are used for.
Comparing the industrial blower and the industrial fan, the former can provide higher pressure for the media that they deal with.
As for the applications of them, since the former is able to withstand higher pressure, what they serve for can range from the dust control of a small area to the pneumatic conveying. While the latter is mainly applied for cooling and drying purposes.
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