Positive Displacement Blowers
Positive displacement blowers, which are suitable for applications which involve either air or neutral gas, operate in a relatively simplistic fashion. Air or gas enters through a section on one side of the blower which increases in size and exits through the other side which decreases in size. Due to the difference in proportion between the entry and exit points, positive displacement of the air occurs as it is released through the contracting side, increasing air pressure.
Rotary Lobe Blowers
One specific kind of positive displacement blower is the rotary lobe blower. This operates by way of dual rotors which rotate in opposing directions. The blower draws in air, and the lobes spin the air around before impelling it outward.
Helical Screw Blowers
Helical screw blowers, much like centrifugal blowers, are able to produce air at higher pressures than rotary lobe blowers. Helical screw blowers utilize two rotors, which are each equipped with lobes (usually two or three). The main rotor fits into the flute of a second rotor.
Centrifugal Blowers
Helical screw blowers, much like centrifugal blowers, are able to produce air at higher pressures than rotary lobe blowers. Helical screw blowers utilize two rotors, which are each equipped with lobes (usually two or three). The main rotor fits into the flute of a second rotor.
