Correction For Thermal Expansion; General - ABB AMA Manual

3.6.4 Correction for thermal expansion

3.6.4.1 General

3BFP 000 063 R0101 REV D
BRACKET WITH ADJUSTING SCREW
Figure 3-4 Positioning of bracket plates
Bracket plates are placed against the foundation edge and tied down with expansion bolts, see
Figure 3-5 Mounting of the bracket plate. Move the machine by using the adjusting screws until
the shaft centerline and the driven machine centerline are aligned roughly and the desired
distance between the coupling halves is reached. Leave all adjusting screws only lightly
tightened.
BRACKET WITH ADJUSTING SCREW
Figure 3-5 Mounting of the bracket plate
NOTE: Figure 3-5 Mounting of the bracket plate shows bracket plate mounted to concrete
foundation, place similar bracket plate on steel foundation.
Running temperatures have a considerable influence on the alignment, and should therefore be
considered during the alignment. The machine temperature is lower during erection than under
operating conditions. For this reason, the shaft center will be higher, i.e. further away from the
feet during operation than standstill.
It may therefore be necessary to use heat compensated alignment depending on the operating
temperature of the driven machine, coupling type, distance between machines, etc.
Manual for High Voltage Process Performance Motors
EXPANSION BOLT
Installation and Alignment - 25