Loading Capacity; Measuring Dynamic Torque - HBM T10FM Mounting Instructions

T10FM
8

Loading capacity

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, on Page 46.

8.1 Measuring dynamic torque

The torque flanges can be used to measure static and dynamic torques. The
following rule applies to the measurement of dynamic torque:
 The T10FM calibration made for static measurements is also valid for
dynamic torque measurements.
 The natural frequency f
the moments of inertia J
T10FM torsional stiffness.
Use the equation below to approximately determine the natural frequency f
the mechanical measuring arrangement:
+۷ 1
f c
·۷
0 T
2p
 The oscillation width is, depending on the measuring range, 25, 45 and
80 kNm (see Specifications, Page 50), even with alternating loads. The
oscillation width must lie between the maximum upper and lower torques of
the defined loading range. The same also applies to transient resonance
points.
A0894-5.2 en
for the mechanical measuring system depends on
0
and J of the connected rotating masses and the
1 2
· 1 ۷) 1
J J
1 2
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
39
of
0
2
HBM