Atlas Copco air motors - IAG

LZB Vane motors
Introduction
LZB vane motors are designed to provide high performance and
high standards of reliability. Typically, they are characterized by a
high power output and small physical size, Figure 14.
The design of the motor is chosen to be long and slim. This gives a
number of advantages like a high power to volume ratio, a low air
consumption and long vane life. All motors utilise five vanes,
which are supplied with vane air, to ensure excellent starting and
low speed performance. Multi-step planetary gears are used to meet
the torque and speed requirements of the application, offering high
efficiency with compact dimensions.
Shaft loading
The maximum allowable loads on a given motor´s output shaft are
illustrated in Figure 15. The relevant load curve code for a motor is
stated in the data tables for each specific motor designation, under
the ”Shaft load code” column. These values have been calculated
for shaft and bearing working lives of 10 million turns. To achieve
a working life of 100 million turns, the loading factor must be halved.
Fr
(N )
450
400
350
300
250
200
150
100
50
0
Threaded
shaft
a thread
b thread
c thread
12 ATLAS COPCO AIRMOTORS
Fr (max 400 N)
Fa
500 1000
1500 2000
2500
Figure 14
Fa
(N )
Fr
(N )
3500
3000
2500
2000
1500
1000
500
Fr
(N)
4000
3000
2000
1000
500 1000 1500 2000 2500 3000 3500 4000 4500
e thread
g thread
1000
Cylindric
shaft
Fr
(N)
2000
1500
1000
500
Curva d
Curva c
Curva b
Curva a
2000
Curva h A = 20 mm
A = 15 mm
A = 20 mm
A = 15 mm
500
Factor de conversión
1N = 0.225 lbf
3000
1000
A = 20 mm
A = 15 mm
A = 9 mm
A = 8 mm
4000
Fr
1500
A
2000
5000
Fa
(N)
6000
5000
Fa
Figure 15
Fa
(N )
7000
Fa
(N)