Earlier methods for measuring turbines were very time-consuming. With laser measurement, the work can be performed quickly and with extremely high precision. The potential to document measurement results is also a great advantage.
When measuring the straightness of diaphragms and bearing journals in a steam or gas turbine, the turbine alignment equipment, system E960, is used. The laser transmitter is mounted at one end of the turbine’s centre line (usually a bearing journal).
The measurement result displays the straightness of the bearing and the diaphragm’s centre line, both vertically and horizontally, compared with two zero (reference) points. The flatness of the parting surface is measured with laser D22 and a suitable detector. The measurement values are recorded at the marked points on the surface, after which three zero points are selected to which the flatness refers.
The points can be measured and adjusted in any order. The measured reference line (A) can be offset (B) in the measurement program. This is especially useful when measuring and adjusting turbine diaphragms and bearing positions that have different centre lines due to thermal expansion.
Shaft alignment is another great requirement within the power industry (read more under Applications / Shaft alignment.)