Loading Capacity; Measuring Dynamic Torque - HBM T22 Montageanleitung

12
4

Loading capacity

The torque transducer T22 can be used to measure static and dynamic
torques.
Nominal torque can be exceeded statically up to the limit torque. If the nominal
torque is exceeded, additional irregular loading is not permissible. This
includes longitudinal forces, lateral forces and bending moments. Limit values
can be found in the "Specifications" Chapter, Page 15.

4.1 Measuring dynamic torque

The following rule applies to the measurement of dynamic torque:
 The calibration performed for static torques is also valid for dynamic torque
measurements.
NOTE
The frequency of the dynamically acting torques must be smaller than
the natural frequency of the mechanical measuring system.
 The natural frequency f
the moments of inertia J
torsional stiffness of the transducer.
The equation below can be used to approximately determine the natural
frequency f of the mechanical measuring arrangement.
0
+ 1
f
·
0
2p
 The oscillation width (peak‐to‐peak) can be max. 80 % of the nominal
(rated) torque designated for the torque transducer, even under alternating
load. The oscillation width must fall within the loading range specified by
-M and +M
nom
HBM
of the mechanical measuring system depends on
0
and J
1 2
· 1 ) 1
c
T
J J
1 2
.
nom
of the connected rotating masses and the
f = Natural frequency in Hz
0
J , J = Mass moment of inertia in kgm
1 2
c = Torsional stiffness in Nm/rad
T
T22
2
A2302-6.0 en/de