Magtrol TM 301, Руководство пользователя

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2.2 PARASITIC FORCES
Incorrectly mounted torque transducers can generate parasitic forces on the measuring shaft in radial (F
R
)
and axial direction (F
A
) (
see Fig.2-4
).
Fig.2-4 Parasitic Forces
2.2.1 RADIAL FORCES (BENDING)
Radial forces (F
R
see Fig.2-4
) generate a bending momentum in the measuring shaft resulting in displace-
ment of its center of gravity. This disequilibrium will load the shaft periodically with a frequency proportion-
al to the speed of rotation. This effect is particularly noticeable at high speeds.
IN EXTREME CASES, A HIGH BENDING FORCE MAY CAUSE PERMANENT DEFORMATION OF
THE MEASURING SHAFT, LEADING TO FALSE MEASURING RESULTS.
The following table lists the maximum radial forces F
R
allowed for TMB, TM and TMHS Series torque trans-
ducer shafts in suspended and supported installations.
MODEL
F
R
max.
(Suspended
installations)
F
R
max.
(Supported installations)
TM / TMB
a)
TMHS
N N N
TM 301 b) 8
N/A
TM 302
b)
16
TM 303 b) 25 25
TM 304 20 50 50
TM 305 40 80 80
TM 306 70 120
120 TM 307 60 120
TM 308 80 160
TM 309 60 150 150
TM 310 120 300
280
TM 311 200 410
TM 312 300 570 420
TM 313 500 550 410
TM 314 800 900 680
TM 315 1 100 850 640
TM 316
2 200
1 460 1 090
TM 317 1 300 980
d) If available (
see section 1.3 - Fiche technique
)
e) Suspended installation is not recommended for these models
F
R
F
A
F
A
F
A
F
R
F
R
F
R
Suspended installation Supported installation
CAUTION
15
TM
series
INSTALLATION / CONFIGURATION