Loading Capacity - HBM TB1A Montageanleitung

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4.5 Loading capacity

The torque measuring discs can be used to measure static and dynamic
torques.
Please note the following when measuring dynamic torque:
• The calibration made for static torques is also valid for dynamic torque
measurements.
• The natural frequency f
the moments of inertia J
TB1A's torsional stiffness.
Use the below equation to determine the natural frequency f
mechanical measuring system:
+ 1
f · c
0 T
2p
• The maximum permissible amplitude of vibration (peak to peak) may be
160 % (at nominal torque 10 kN⋅m=120 %) of the TB1A's nominal torque,
even with alternating load. In all cases the vibration bandwidth must lie
within the loading range defined by −M
Caution: Even in a resonance situation, you must keep to the mechanical
limits. Torsion spring rigidity and moment of inertia for estimating the the
natural frequency, can be found in Chapter 8.
Nominal torque M
+M 100 %
N
90
0
70
−M 100 %
N
Fig. 4.7: Permissible dynamic loading
HBM
for the mechanical measuring system depends on
0
and J of the connected rotating masses and the
1 2
· 1 ) 1
J J
1 2
in %
N
f = Natural frequency in Hz
0
J J = Mass moment of inertia in kgm
1, 2
c = Torsional stiffness in N⋅m/rad
T
and +M .
N N
TB1A
for the
0
2
160 % (120 %) M
N
vibration bandwidth
A0162 7.0 en/de/fr