Airzon 3 LOBES ROOTS BLOWER, Known also as POSITIVE
DISPLACEMENT ROTARY COMPRESSOR, Are used in conditions ranging from strong vacuum to
high pressure in all branches of industries especially in waste water treatment plant.
The simple design, easy handling, and stable performance make possible of wide
range of applications. Its main characteristic is to produce constant flow of gas at different
pressure and efficiency are normally high.
Important feature is that the pumped gas does not get contaminated because there are no
lubricants in the area in which the compression occurs.
The blower consist of a cost-iron casing in which two rotors with conjugate shape rotate and are
sync-hronied by a set of timing gars. During the rotation, there is no contact either between the
lobes and the casing.
Two front and rear side covers close each casing: the bearing of the shafts and the sealing
devices to avoid gas leakage are located there.
Operating Principle
The Trilobe rotors rotate one opposite to the other: their movement is
synchronized by a set of timing gears. The geometric configuration of the lobes allows them to have,
at any moment, a generatrix in common; due to very low machine tolerance, this common generatrix
acts also as a seal device for both rotors.
During the operation, one or two lobes of each rotor come into contact with the
internal surface of the casing: this crete a chamber in which the gas is trapped. As the rotation
continues, the trapped gas moves along until it reaches the position of discharging port.
The two rotors make six intake and exhaust cycles per therefore the capacity of the
roots blower is determined by its operating speed and increase proportionally with the speed, but is
independent from the pressure differential between inlet and outlet ports.
