The shaft load diagrams of the individual motors are given in the following
chapters:
●
MKE037
chapter 4.2 "MKE037" on page 26
●
MKE047
chapter 4.3 "MKE047" on page 28
●
MKE098
chapter 4.4 "MKE098" on page 30
●
MKE118
chapter 4.5 "MKE118" on page 33
Maximum permissible radial force
Fradial_max
The maximum permissible radial force F
radial_max
depends on the following fac‐
tors:
●
Shaft break load
●
Force's point of application x
●
Shaft design (plain; with key)
Permissible radial force Fradial
The maximum permissible radial force F
radial
depends on the following factors
●
Arithmetic mean speed (n
mittel
)
●
Force's point of application x
●
Bearing lifetime
Permitted axial force Faxial
The maximum permitted axial force F
axial
is specified in the Technical Data, in
the ”Shaft load” section.
Mean speed
In the exact calculation of the mean speed according to the following example,
the run-up and braking times are taken into account.
n
1m
; n
2m
Mean speed section
n
1
; n
2
processing speed
t
H1
; t
H2
run-up time
t
1
; t
2
processing time
t
B1
; t
B2
braking time
t
11
; t
22
standstill time
Fig.9-18:
Mean speed
A complete processing cycle can consist of several sections with different
speeds. In this case, the average is to be generated from all the sections.
The run-up and braking times can be ignored in the calculation if
the time in which the drive is operated at a constant speed is sig‐
nificantly greater than the acceleration and braking time.
9.10.3
Attachment of Drive Elements
Whenever attaching drive elements to the output shaft, such as
●
gearboxes
Project Planning Manual | Rexroth MKE Synchronous Motors
Electric Drives
and Controls
| Bosch Rexroth AG
87/131
Operating Conditions and Application Notes
