PRÜFTECHNIK ROTALIGN ALI 3.500, Operating Instructions And Alignment Handbook

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ROTALIGN 01.2000
Practical examples of thermal growth entries
Practical examples of
thermal growth entries
A general description of the thermal growth function is given on the
following pages. Entered values reflect the expected amount of
thermal growth at the individual machine feet.
Consider, for example, the following diagram of "cold" alignment
condition, i.e. before the machines are started:
"Hot" (steady state operation) shaft line
(All values are expressed here in 1/100 mm)
Sign convention:
+ Machine moves upwards
as it warms up
- Machine moves downwards
as it warms up
The individual values for entry into the ROTALIGN computer are
simply read from the diagram: the distance between the "cold" shaft
line to the "hot" shaft line is read for each machine foot. These
amounts are entered via softkeys as follows into the thermal growth
screen:
18
15
13
16