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Mechanical installation
26
A4429-3.0
HBM: public
T40FH
There are fan-type lock washers (M4+M5) between the antenna segments:
make sure that they do not get lost.
2. Use an appropriate mounting base to install the stator housing in the shaft
train, so that there is sufficient opportunity for horizontal and vertical adjust
ments. Do not fully tighten the screws yet.
3. Now use four hexagon socket screws to mount the upper antenna segment
removed in Point 1. on the lower antenna segment.
Make sure that the fan-type lock washers are inserted between the antenna
segments (these ensure that there is a defined contact resistance)!
Important
To guarantee that they function perfectly, the fan-type lock washers (A5, 3-FST
DIN 6798 ZN/galvanized) must be replaced after the bolted antenna connection
has been loosened three times.
4. Now tighten all the bolted antenna segment connections with a tightening
torque of 5 N
⋅
m.
5. Then align the antenna to the rotor in such a way that the antenna encloses
the rotor more or less coaxially and the antenna wire in the axial direction
has the same position as the center of the transmitter winding on the rotor.
To make alignment easier, the outer edge of the stator antenna segment
and the outer edge of the stator winding carrier should be on the same line
(in alignment). Conform to the permissible alignment tolerances stated in
the specifications.
6. Now fully tighten the bolted stator housing connection.
Prevention of axial stator oscillation
Depending on the operating conditions, stator oscillation may be induced. This
effect is dependent on:
S
the rotational speed,
S
the antenna diameter (depends in turn on the measuring range),
S
the construction of the machine base.