Product
Description
LCB Compact Linear Actuator
36
192-510014 N04 March 2010
4.3.4.
Critical whirling speed of the dual-axis actuator connection
shaft
The critical whirling speed is the speed from which the connection shaft of the double-axis actuator
shows natural oscillation. This oscillation can get so strong that, in an extreme case, the double-axis
connection is destroyed.
The critical rotational speed depends on the length of the connection shaft (=linear to the axis
distance) and on the speed of the shaft (=linear to the speed of the actuator). The diagrams show from
where it is necessary to equip the connection shaft with an additional support in the middle of the
shaft.
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
500
600
700
800
900
1000
A
ch
sa
b
st
an
d
/
d
is
ta
n
ce
[
m
m
]
Geschwindigkeit / speed [m/s]
(2)
(1)
(1) Connection shaft without intermediate shaft bearing
(2) Connection shaft must be supported
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
Geschwindigkeit / speed [m/s]
900
1000
A
ch
sa
b
s
ta
n
d
/
d
is
ta
n
ce
[
m
m
]
1100
1200
1300
1400
1500
(2)
(1)
(3)
(1) Connection shaft without intermediate shaft bearing
(2) Connection shaft must be supported
(3) impermissible range
LCB040
LCB060
