Earlier methods for turbine measurements where very time consuming. With laser
measurement the work is done fast and with very high accuracy. The possibility to
document the measurement is also a great advantage.
Measuring straightness of a steam or gas turbine diaphragm
When measuring straightness of
a steam or gas turbine diaphragm the Turbine equipment is used. The laser
transmitter is placed at the end of the turbine center line (most often a bearing).
The detector fixture is placed at each part of the diaphragm that has to be measured.
Values are recorded in three positions (9, 6 and 3 o'clock) by turning the detector
probe.
The result of the measurement shows the straightness of the diaphragm
centerline both vertically and horizontally, compared to two zero (reference) points.
The flatness of the parting surfaces are measured with the D22 laser and D5
detector. Measurement values are recorded at marked points at the surface, then
three points are selected as references, giving the flatness of the surface.
Another alignment need in the power generating industry are for example
Shaft alignment.
A. The detector with the measurement probe in position 6 o'clock (straightness measurement).
B. Flatness measurement of parting surface.
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