REXROTH IndraDyn A Series, Руководство по планированию проекта, Страница: 183 / 220

Rexroth IndraDyn A Application Notes
9-27
Couplings
Couplings are attached for the torque transmission of two separate shaft
ends, whereby normally the shaft offset, angular misalignment or axial
distances must be balanced. When attaching couplings that are too stiff, a
circumferential (= continuously changing the angular position) radial load
can thereby be generated to the drive end. This circumferential radial load
may result in an impermissibly high load to the seating of the bearing and
thereby to a significantly reduced lifetime of the bearing.
Note:
Rexroth offers the „R“ bearing type for attaching couplings to
IndraDyn A motors.
By using the “R“ bearing, high circumferential radial forces can be
absorbed. Furthermore, couplings with a high rate of radial rigidity can be
used.
Permissible circumferential radial forces
Motor frame size
MAD/MAF….
with “R“ bearing: with bearing
“N“, “H“, “V“
100B 800 N 25 N
100C 800 N 25 N
100D 800 N 30 N
130B 1000 N 40 N
130C 1000 N 50 N
130D 1000 N 55 N
160B 1300 N 65 N
160C 1300 N 65 N
180C 1600 N 95 N
180D 1600 N 100 N
Fig. 9-32: Permissible circumferential radial forces
Note:
By using the “R“ bearing, a limited maximum speed is
available.
Details on the maximum speed are contained in Chapter 4,
“Technical Data“ for the respective motor.
When used with R-type bearings, Rexroth recommends axial-balancing
couplings such as, e.g.
•
Spring washer couplings with two spring packages (double cardanic)
•
Metal bellows couplings
These types of coupling are backlash-free and have a high level of
torsional rigidity with a low radial spring rigidity.
Note:
If the recommended types of coupling cannot be used then
you
must
contact Bosch Rexroth.
Coupling Recommendations