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2-3
How to obtain the maximum load moment load
How to obtain the maximum load moment load is shown below. Check Mmax <=Mc.
● Formula (1)
Mmax＝Frmax(Lr+R)+Famax･La
Symbol of Formula (1)
Maximum
Frmax
load
Maximum
Famax
load
Lr ,La
――――
Offset amount
R
2-4
How to obtain the average load
(Average radial load, average axial load, average output rotational frequency)
If the radial load and the axial load fluctuate, they should be converted into the average load to check the
life of the 4-point contact bearing.
● Formula (2) How to obtain the average radial load (Frav)
3
n
t
=
1
av
Fr
Note that the maximum radial load within the t1 section is Fr1
and the maximum radial load within the t2 section is Fr2.
●Formula (3) How to obtain the average axial load (Faav)
3
n
t
(
=
1
1
av
Fr
Note that the maximum axial load within the t1 section is Fa1
and the maximum axial load within the t2 section is Fa2.
●Formula (4) How to obtain the average output rotational frequency (Nav)
N
Chapter 2 Installing of Motor
radial
See Figure 1.
N(kgf)
axial
See Figure 1.
N(kgf)
See Figure 1.
m
See Figure 1
m
and Table 1.
)
)
+
3
3
(
Fr
n
t
(
Fr
n
+
1
1
2
2
2
+
+
+
n
t
n
t
n
n
1
1
2
2
)
)
3
3
Fa
n
t
(
Fa
+
1
2
2
2
+
+
+
n
t
n
t
1
1
2
2
+
+
+
n
t
n
t
n
=
1
1
2
2
av
+
+
+
t
t
t
1
2
n
Figure 1External load influence diagram
Radial load Fr
La
Axial load Fa
)
3
t
(
Fr
n
n
n
t
n
+
)
3
n
t
(
Fa
n
n
n
n
t
n
n
t
n
n
4
Lr
R
dp
F
R
L/2
L
Graph: Load pattern and output
rotational frequency
Time
Time
Time
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