Atlas Copco air motors - IAG

Lubrication free air motors
Atlas Copco’s lubrication free air motors are
equipped with low-friction vanes, sealed bearings
and vented cylinder plates. Since they release no
lubricants into the air, they offer a viable drive
solution for sensitive processes and hygienic
environments where oil contamination would be
at best a problem and, at worst, a catastrophe.
LZB 33 high torque – low speed air motors
Accomplishing high torques generally calls for very large motors
with correspondingly high air consumption. The LZB 33 high torque/low
speed air motors are based on the combination of LZB 33,
the work horse in Atlas Copco´s air motor program, and the gears
used in the large LZB 42-54 motors. This gives a compact
motor/gear package. The gears are dimensioned to
stand being loaded at full stall torque indefinitely.
Competing low speed air motors often have to
limit their output torques to prevent gear breakage.
LZB 22LR and 33LR – low speed
airmotors
When there is a need for low
speed only, the LR motors offer
a complete and low price
solution compared to the high torque
LZB 33 airmotors.
Motors with brake
The most popular vane motors, LZB 33, are
available with parking brake. This
brake is located between the
motor and the gear. It is a disc
brake that is spring activated
when the motor is not running. When the motor is
started the brake is released by a built in pneumatic
piston. The brake is used when it is important
that the output shaft must not turn when the
motor isn’t running and a torque is applied on the
shaft.
A: Clockwise rotation
AR: Reversible
AV: Anti-clockwise rotation
L: Lubrication free
LB: With brake module
LR: Low speed
R: Stainless steel
RL: Stainless steel, lubrication free
RLB: Stainless steel, with brake module
RLR: Stainless steel, low speed
Table 1 illustrates what features the letters in the motor
designation stands for.
Table 1
LZL Vane motors – 1.3 kW to 6,5 kW
Type LZL Atlas Copco vane motors have been designed to offer
outstanding starting and low speed performance. These general purpose
motors are powerful, rugged and hard wearing, Figure 11.
Helical gear units
Atlas Copco helical gear units are normally fitted to Type LZL
vane motors. Standard units are highly efficient, providing speeds
of 500 r/min down to 15 r/min at torques of up to 4500 Nm. The
gear unit is flange-coupled to the motor and the shafts are joined by
a flexible coupling, Figure 12.
5000 r/min
500 r/min
Worm gear units
Figure 11
Figure 12
The LZL vane motors can also be supplied with worm gear units.
In this configuration, they will deliver speeds of 500 r/min down to
45 r/min at torques of up to 570 Nm. Worm gear units have a selfbraking
action that can be beneficial in certain applications. The
worm gear unit is flange-coupled to the motor and the shafts are
linked by a flexible coupling, Figure 13.
Figure 13
ATLAS COPCO AIRMOTORS 9