17
2.1
mounting possibilities
Magtrol TM Series Torque In-Line Torque Transducers must, above all, be considered precision
measuring instruments and not torque transmission components. The transducer model and the
alignment precision highly influence the measuring precision as well as the operating life of the
transducer, especially of the bearings and couplings.
There are two different ways of mounting TM Torque Transducers: suspended and supported
installation.
2.1.1
S
uSpended
I
nSTallaTIon
both the measuring shaft and torque transducer housing are supported by the driving and driven
machine shafts via couplings (see
figure 2–1
). In this configuration, couplings offering only one
degree of freedom are adequate to avoid a hyperstatic mounting.
CAUTION!
ROTATING PARTS
IN OPERATION.
STOP SYSTEM BEFORE
PERFORMING
MAINTENANCE.
D
C
B
A
F
E
!
Figure 2–1 Suspended Installation
2.1.1.1
Advantages
• Single-element couplings are less expensive than double-element couplings.
• Shorter drive train leading to a higher torsional resonance frequency (as compared to double-
element couplings).
2.1.1.2
Disadvantages
• Increase of radial play as the torque transducer is not directly fixed to the test bench.
Consequently, the critical speed is lower than with a supported installation.
Note:
The low friction torque generated by the bearings, as well as the
weight of the built-in electronic housing, results in only the shaft
being driven by the rotating system.
2.1.2
S
upporTed
I
nSTallaTIon
The measuring shaft is supported by the torque sensor housing, which itself is fixed to the test bench
frame by means of a support unit (see
Figure 2–2)
. here, couplings with two degrees of freedom
must be used in order to avoid hyperstatic mountings.
2. Installation / Configuration